Adding upstream version 2.4.38.upstream/2.4.38upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3097 insertions, 0 deletions

diff --git a/modules/proxy/mod_proxy.c b/modules/proxy/mod_proxy.c
new file mode 100644
index 0000000..69a35ce
--- /dev/null
+++ b/modules/proxy/mod_proxy.c
@@ -0,0 +1,3097 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mod_proxy.h"
+#include "mod_core.h"
+#include "apr_optional.h"
+#include "scoreboard.h"
+#include "mod_status.h"
+#include "proxy_util.h"
+
+#if (MODULE_MAGIC_NUMBER_MAJOR > 20020903)
+#include "mod_ssl.h"
+#else
+APR_DECLARE_OPTIONAL_FN(int, ssl_proxy_enable, (conn_rec *));
+APR_DECLARE_OPTIONAL_FN(int, ssl_engine_disable, (conn_rec *));
+APR_DECLARE_OPTIONAL_FN(int, ssl_engine_set, (conn_rec *,
+                                              ap_conf_vector_t *,
+                                              int proxy, int enable));
+APR_DECLARE_OPTIONAL_FN(int, ssl_is_https, (conn_rec *));
+APR_DECLARE_OPTIONAL_FN(char *, ssl_var_lookup,
+                        (apr_pool_t *, server_rec *,
+                         conn_rec *, request_rec *, char *));
+#endif
+
+#ifndef MAX
+#define MAX(x,y) ((x) >= (y) ? (x) : (y))
+#endif
+
+/*
+ * We do health-checks only if that (sub)module is loaded in. This
+ * allows for us to continue as is w/o requiring mod_watchdog for
+ * those implementations which aren't using health checks
+ */
+static APR_OPTIONAL_FN_TYPE(set_worker_hc_param) *set_worker_hc_param_f = NULL;
+
+/* Externals */
+proxy_hcmethods_t PROXY_DECLARE_DATA proxy_hcmethods[] = {
+    {NONE, "NONE", 1},
+    {TCP, "TCP", 1},
+    {OPTIONS, "OPTIONS", 1},
+    {HEAD, "HEAD", 1},
+    {GET, "GET", 1},
+    {CPING, "CPING", 0},
+    {PROVIDER, "PROVIDER", 0},
+    {EOT, NULL, 1}
+};
+
+proxy_wstat_t PROXY_DECLARE_DATA proxy_wstat_tbl[] = {
+    {PROXY_WORKER_INITIALIZED,   PROXY_WORKER_INITIALIZED_FLAG,   "Init "},
+    {PROXY_WORKER_IGNORE_ERRORS, PROXY_WORKER_IGNORE_ERRORS_FLAG, "Ign "},
+    {PROXY_WORKER_DRAIN,         PROXY_WORKER_DRAIN_FLAG,         "Drn "},
+    {PROXY_WORKER_GENERIC,       PROXY_WORKER_GENERIC_FLAG,       "Gen "},
+    {PROXY_WORKER_IN_SHUTDOWN,   PROXY_WORKER_IN_SHUTDOWN_FLAG,   "Shut "},
+    {PROXY_WORKER_DISABLED,      PROXY_WORKER_DISABLED_FLAG,      "Dis "},
+    {PROXY_WORKER_STOPPED,       PROXY_WORKER_STOPPED_FLAG,       "Stop "},
+    {PROXY_WORKER_IN_ERROR,      PROXY_WORKER_IN_ERROR_FLAG,      "Err "},
+    {PROXY_WORKER_HOT_STANDBY,   PROXY_WORKER_HOT_STANDBY_FLAG,   "Stby "},
+    {PROXY_WORKER_HOT_SPARE,     PROXY_WORKER_HOT_SPARE_FLAG,     "Spar "},
+    {PROXY_WORKER_FREE,          PROXY_WORKER_FREE_FLAG,          "Free "},
+    {PROXY_WORKER_HC_FAIL,       PROXY_WORKER_HC_FAIL_FLAG,       "HcFl "},
+    {0x0, '\0', NULL}
+};
+
+static const char * const proxy_id = "proxy";
+apr_global_mutex_t *proxy_mutex = NULL;
+
+/*
+ * A Web proxy module. Stages:
+ *
+ *  translate_name: set filename to proxy:<URL>
+ *  map_to_storage: run proxy_walk (rather than directory_walk/file_walk)
+ *                  can't trust directory_walk/file_walk since these are
+ *                  not in our filesystem.  Prevents mod_http from serving
+ *                  the TRACE request we will set aside to handle later.
+ *  fix_ups:        convert the URL stored in the filename to the
+ *                  canonical form.
+ *  handler:        handle proxy requests
+ */
+
+/* -------------------------------------------------------------- */
+/* Translate the URL into a 'filename' */
+
+static const char *set_worker_param(apr_pool_t *p,
+                                    server_rec *s,
+                                    proxy_worker *worker,
+                                    const char *key,
+                                    const char *val)
+{
+
+    int ival;
+    apr_interval_time_t timeout;
+
+    if (!strcasecmp(key, "loadfactor")) {
+        /* Normalized load factor. Used with BalancerMember,
+         * it is a number between 1 and 100.
+         */
+        double fval = atof(val);
+        ival = fval * 100.0;
+        if (ival < 100 || ival > 10000)
+            return "LoadFactor must be a number between 1..100";
+        worker->s->lbfactor = ival;
+    }
+    else if (!strcasecmp(key, "retry")) {
+        /* If set it will give the retry timeout for the worker
+         * The default value is 60 seconds, meaning that if
+         * in error state, it will be retried after that timeout.
+         */
+        ival = atoi(val);
+        if (ival < 0)
+            return "Retry must be a positive value";
+        worker->s->retry = apr_time_from_sec(ival);
+        worker->s->retry_set = 1;
+    }
+    else if (!strcasecmp(key, "ttl")) {
+        /* Time in seconds that will destroy all the connections
+         * that exceed the smax
+         */
+        ival = atoi(val);
+        if (ival < 1)
+            return "TTL must be at least one second";
+        worker->s->ttl = apr_time_from_sec(ival);
+    }
+    else if (!strcasecmp(key, "min")) {
+        /* Initial number of connections to remote
+         */
+        ival = atoi(val);
+        if (ival < 0)
+            return "Min must be a positive number";
+        worker->s->min = ival;
+    }
+    else if (!strcasecmp(key, "max")) {
+        /* Maximum number of connections to remote
+         */
+        ival = atoi(val);
+        if (ival < 0)
+            return "Max must be a positive number";
+        worker->s->hmax = ival;
+    }
+    /* XXX: More inteligent naming needed */
+    else if (!strcasecmp(key, "smax")) {
+        /* Maximum number of connections to remote that
+         * will not be destroyed
+         */
+        ival = atoi(val);
+        if (ival < 0)
+            return "Smax must be a positive number";
+        worker->s->smax = ival;
+    }
+    else if (!strcasecmp(key, "acquire")) {
+        /* Acquire timeout in given unit (default is milliseconds).
+         * If set this will be the maximum time to
+         * wait for a free connection.
+         */
+        if (ap_timeout_parameter_parse(val, &timeout, "ms") != APR_SUCCESS)
+            return "Acquire timeout has wrong format";
+        if (timeout < 1000)
+            return "Acquire must be at least one millisecond";
+        worker->s->acquire = timeout;
+        worker->s->acquire_set = 1;
+    }
+    else if (!strcasecmp(key, "timeout")) {
+        /* Connection timeout in seconds.
+         * Defaults to server timeout.
+         */
+        ival = atoi(val);
+        if (ival < 1)
+            return "Timeout must be at least one second";
+        worker->s->timeout = apr_time_from_sec(ival);
+        worker->s->timeout_set = 1;
+    }
+    else if (!strcasecmp(key, "iobuffersize")) {
+        long s = atol(val);
+        if (s < 512 && s) {
+            return "IOBufferSize must be >= 512 bytes, or 0 for system default.";
+        }
+        worker->s->io_buffer_size = (s ? s : AP_IOBUFSIZE);
+        worker->s->io_buffer_size_set = 1;
+    }
+    else if (!strcasecmp(key, "receivebuffersize")) {
+        ival = atoi(val);
+        if (ival < 512 && ival != 0) {
+            return "ReceiveBufferSize must be >= 512 bytes, or 0 for system default.";
+        }
+        worker->s->recv_buffer_size = ival;
+        worker->s->recv_buffer_size_set = 1;
+    }
+    else if (!strcasecmp(key, "keepalive")) {
+        if (!strcasecmp(val, "on"))
+            worker->s->keepalive = 1;
+        else if (!strcasecmp(val, "off"))
+            worker->s->keepalive = 0;
+        else
+            return "KeepAlive must be On|Off";
+        worker->s->keepalive_set = 1;
+    }
+    else if (!strcasecmp(key, "disablereuse")) {
+        if (!strcasecmp(val, "on"))
+            worker->s->disablereuse = 1;
+        else if (!strcasecmp(val, "off"))
+            worker->s->disablereuse = 0;
+        else
+            return "DisableReuse must be On|Off";
+        worker->s->disablereuse_set = 1;
+    }
+    else if (!strcasecmp(key, "enablereuse")) {
+        if (!strcasecmp(val, "on"))
+            worker->s->disablereuse = 0;
+        else if (!strcasecmp(val, "off"))
+            worker->s->disablereuse = 1;
+        else
+            return "EnableReuse must be On|Off";
+        worker->s->disablereuse_set = 1;
+    }
+    else if (!strcasecmp(key, "route")) {
+        /* Worker route.
+         */
+        if (strlen(val) >= sizeof(worker->s->route))
+            return apr_psprintf(p, "Route length must be < %d characters",
+                    (int)sizeof(worker->s->route));
+        PROXY_STRNCPY(worker->s->route, val);
+    }
+    else if (!strcasecmp(key, "redirect")) {
+        /* Worker redirection route.
+         */
+        if (strlen(val) >= sizeof(worker->s->redirect))
+            return apr_psprintf(p, "Redirect length must be < %d characters",
+                    (int)sizeof(worker->s->redirect));
+        PROXY_STRNCPY(worker->s->redirect, val);
+    }
+    else if (!strcasecmp(key, "status")) {
+        const char *v;
+        int mode = 1;
+        apr_status_t rv;
+        /* Worker status.
+         */
+        for (v = val; *v; v++) {
+            if (*v == '+') {
+                mode = 1;
+                v++;
+            }
+            else if (*v == '-') {
+                mode = 0;
+                v++;
+            }
+            rv = ap_proxy_set_wstatus(*v, mode, worker);
+            if (rv != APR_SUCCESS)
+                return "Unknown status parameter option";
+        }
+    }
+    else if (!strcasecmp(key, "flushpackets")) {
+        if (!strcasecmp(val, "on"))
+            worker->s->flush_packets = flush_on;
+        else if (!strcasecmp(val, "off"))
+            worker->s->flush_packets = flush_off;
+        else if (!strcasecmp(val, "auto"))
+            worker->s->flush_packets = flush_auto;
+        else
+            return "flushpackets must be on|off|auto";
+    }
+    else if (!strcasecmp(key, "flushwait")) {
+        ival = atoi(val);
+        if (ival > 1000 || ival < 0) {
+            return "flushwait must be <= 1000, or 0 for system default of 10 millseconds.";
+        }
+        if (ival == 0)
+            worker->s->flush_wait = PROXY_FLUSH_WAIT;
+        else
+            worker->s->flush_wait = ival * 1000;    /* change to microseconds */
+    }
+    else if (!strcasecmp(key, "ping")) {
+        /* Ping/Pong timeout in given unit (default is second).
+         */
+        if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
+            return "Ping/Pong timeout has wrong format";
+        if (timeout < 1000)
+            return "Ping/Pong timeout must be at least one millisecond";
+        worker->s->ping_timeout = timeout;
+        worker->s->ping_timeout_set = 1;
+    }
+    else if (!strcasecmp(key, "lbset")) {
+        ival = atoi(val);
+        if (ival < 0 || ival > 99)
+            return "lbset must be between 0 and 99";
+        worker->s->lbset = ival;
+    }
+    else if (!strcasecmp(key, "connectiontimeout")) {
+        /* Request timeout in given unit (default is second).
+         * Defaults to connection timeout
+         */
+        if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
+            return "Connectiontimeout has wrong format";
+        if (timeout < 1000)
+            return "Connectiontimeout must be at least one millisecond.";
+        worker->s->conn_timeout = timeout;
+        worker->s->conn_timeout_set = 1;
+    }
+    else if (!strcasecmp(key, "flusher")) {
+        if (strlen(val) >= sizeof(worker->s->flusher))
+            apr_psprintf(p, "flusher name length must be < %d characters",
+                    (int)sizeof(worker->s->flusher));
+        PROXY_STRNCPY(worker->s->flusher, val);
+    }
+    else if (!strcasecmp(key, "upgrade")) {
+        if (PROXY_STRNCPY(worker->s->upgrade, val) != APR_SUCCESS) {
+            return apr_psprintf(p, "upgrade protocol length must be < %d characters",
+                                (int)sizeof(worker->s->upgrade));
+        }
+    }
+    else if (!strcasecmp(key, "responsefieldsize")) {
+        long s = atol(val);
+        if (s < 0) {
+            return "ResponseFieldSize must be greater than 0 bytes, or 0 for system default.";
+        }
+        worker->s->response_field_size = (s ? s : HUGE_STRING_LEN);
+        worker->s->response_field_size_set = 1;
+    }
+    else {
+        if (set_worker_hc_param_f) {
+            return set_worker_hc_param_f(p, s, worker, key, val, NULL);
+        } else {
+            return "unknown Worker parameter";
+        }
+    }
+    return NULL;
+}
+
+static const char *set_balancer_param(proxy_server_conf *conf,
+                                      apr_pool_t *p,
+                                      proxy_balancer *balancer,
+                                      const char *key,
+                                      const char *val)
+{
+
+    int ival;
+    if (!strcasecmp(key, "stickysession")) {
+        char *path;
+        /* Balancer sticky session name.
+         * Set to something like JSESSIONID or
+         * PHPSESSIONID, etc..,
+         */
+        if (strlen(val) >= sizeof(balancer->s->sticky_path))
+            apr_psprintf(p, "stickysession length must be < %d characters",
+                    (int)sizeof(balancer->s->sticky_path));
+        PROXY_STRNCPY(balancer->s->sticky_path, val);
+        PROXY_STRNCPY(balancer->s->sticky, val);
+
+        if ((path = strchr((char *)balancer->s->sticky, '|'))) {
+            *path++ = '\0';
+            PROXY_STRNCPY(balancer->s->sticky_path, path);
+        }
+    }
+    else if (!strcasecmp(key, "stickysessionsep")) {
+        /* separator/delimiter for sessionid and route,
+         * normally '.'
+         */
+        if (strlen(val) != 1) {
+            if (!strcasecmp(val, "off"))
+                balancer->s->sticky_separator = 0;
+            else      
+                return "stickysessionsep must be a single character or Off";
+        }
+        else
+            balancer->s->sticky_separator = *val;
+        balancer->s->sticky_separator_set = 1;
+    }
+    else if (!strcasecmp(key, "nofailover")) {
+        /* If set to 'on' the session will break
+         * if the worker is in error state or
+         * disabled.
+         */
+        if (!strcasecmp(val, "on"))
+            balancer->s->sticky_force = 1;
+        else if (!strcasecmp(val, "off"))
+            balancer->s->sticky_force = 0;
+        else
+            return "failover must be On|Off";
+        balancer->s->sticky_force_set = 1;
+    }
+    else if (!strcasecmp(key, "timeout")) {
+        /* Balancer timeout in seconds.
+         * If set this will be the maximum time to
+         * wait for a free worker.
+         * Default is not to wait.
+         */
+        ival = atoi(val);
+        if (ival < 1)
+            return "timeout must be at least one second";
+        balancer->s->timeout = apr_time_from_sec(ival);
+    }
+    else if (!strcasecmp(key, "maxattempts")) {
+        /* Maximum number of failover attempts before
+         * giving up.
+         */
+        ival = atoi(val);
+        if (ival < 0)
+            return "maximum number of attempts must be a positive number";
+        balancer->s->max_attempts = ival;
+        balancer->s->max_attempts_set = 1;
+    }
+    else if (!strcasecmp(key, "lbmethod")) {
+        proxy_balancer_method *provider;
+        if (strlen(val) > (sizeof(balancer->s->lbpname)-1))
+            return "unknown lbmethod";
+        provider = ap_lookup_provider(PROXY_LBMETHOD, val, "0");
+        if (provider) {
+            balancer->lbmethod = provider;
+            if (PROXY_STRNCPY(balancer->s->lbpname, val) == APR_SUCCESS) {
+                balancer->lbmethod_set = 1;
+                return NULL;
+            }
+            else {
+                return "lbmethod name too large";
+            }
+        }
+        return "unknown lbmethod";
+    }
+    else if (!strcasecmp(key, "scolonpathdelim")) {
+        /* If set to 'on' then ';' will also be
+         * used as a session path separator/delim (ala
+         * mod_jk)
+         */
+        if (!strcasecmp(val, "on"))
+            balancer->s->scolonsep = 1;
+        else if (!strcasecmp(val, "off"))
+            balancer->s->scolonsep = 0;
+        else
+            return "scolonpathdelim must be On|Off";
+        balancer->s->scolonsep_set = 1;
+    }
+    else if (!strcasecmp(key, "failonstatus")) {
+        char *val_split;
+        char *status;
+        char *tok_state;
+
+        val_split = apr_pstrdup(p, val);
+
+        balancer->errstatuses = apr_array_make(p, 1, sizeof(int));
+
+        status = apr_strtok(val_split, ", ", &tok_state);
+        while (status != NULL) {
+            ival = atoi(status);
+            if (ap_is_HTTP_VALID_RESPONSE(ival)) {
+                *(int *)apr_array_push(balancer->errstatuses) = ival;
+            }
+            else {
+                return "failonstatus must be one or more HTTP response codes";
+            }
+            status = apr_strtok(NULL, ", ", &tok_state);
+        }
+
+    }
+    else if (!strcasecmp(key, "failontimeout")) {
+        if (!strcasecmp(val, "on"))
+            balancer->failontimeout = 1;
+        else if (!strcasecmp(val, "off"))
+            balancer->failontimeout = 0;
+        else
+            return "failontimeout must be On|Off";
+        balancer->failontimeout_set = 1;
+    }
+    else if (!strcasecmp(key, "nonce")) {
+        if (!strcasecmp(val, "None")) {
+            *balancer->s->nonce = '\0';
+        }
+        else {
+            if (PROXY_STRNCPY(balancer->s->nonce, val) != APR_SUCCESS) {
+                return "Provided nonce is too large";
+            }
+        }
+        balancer->s->nonce_set = 1;
+    }
+    else if (!strcasecmp(key, "growth")) {
+        ival = atoi(val);
+        if (ival < 1 || ival > 100)   /* arbitrary limit here */
+            return "growth must be between 1 and 100";
+        balancer->growth = ival;
+        balancer->growth_set = 1;
+    }
+    else if (!strcasecmp(key, "forcerecovery")) {
+        if (!strcasecmp(val, "on"))
+            balancer->s->forcerecovery = 1;
+        else if (!strcasecmp(val, "off"))
+            balancer->s->forcerecovery = 0;
+        else
+            return "forcerecovery must be On|Off";
+        balancer->s->forcerecovery_set = 1;
+    }
+    else {
+        return "unknown Balancer parameter";
+    }
+    return NULL;
+}
+
+static int alias_match(const char *uri, const char *alias_fakename)
+{
+    const char *end_fakename = alias_fakename + strlen(alias_fakename);
+    const char *aliasp = alias_fakename, *urip = uri;
+    const char *end_uri = uri + strlen(uri);
+
+    while (aliasp < end_fakename && urip < end_uri) {
+        if (*aliasp == '/') {
+            /* any number of '/' in the alias matches any number in
+             * the supplied URI, but there must be at least one...
+             */
+            if (*urip != '/')
+                return 0;
+
+            while (*aliasp == '/')
+                ++aliasp;
+            while (*urip == '/')
+                ++urip;
+        }
+        else {
+            /* Other characters are compared literally */
+            if (*urip++ != *aliasp++)
+                return 0;
+        }
+    }
+
+    /* fixup badly encoded stuff (e.g. % as last character) */
+    if (aliasp > end_fakename) {
+        aliasp = end_fakename;
+    }
+    if (urip > end_uri) {
+        urip = end_uri;
+    }
+
+   /* We reach the end of the uri before the end of "alias_fakename"
+    * for example uri is "/" and alias_fakename "/examples"
+    */
+   if (urip == end_uri && aliasp != end_fakename) {
+       return 0;
+   }
+
+    /* Check last alias path component matched all the way */
+    if (aliasp[-1] != '/' && *urip != '\0' && *urip != '/')
+        return 0;
+
+    /* Return number of characters from URI which matched (may be
+     * greater than length of alias, since we may have matched
+     * doubled slashes)
+     */
+
+    return urip - uri;
+}
+
+/* Detect if an absoluteURI should be proxied or not.  Note that we
+ * have to do this during this phase because later phases are
+ * "short-circuiting"... i.e. translate_names will end when the first
+ * module returns OK.  So for example, if the request is something like:
+ *
+ * GET http://othervhost/cgi-bin/printenv HTTP/1.0
+ *
+ * mod_alias will notice the /cgi-bin part and ScriptAlias it and
+ * short-circuit the proxy... just because of the ordering in the
+ * configuration file.
+ */
+static int proxy_detect(request_rec *r)
+{
+    void *sconf = r->server->module_config;
+    proxy_server_conf *conf =
+        (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module);
+
+    /* Ick... msvc (perhaps others) promotes ternary short results to int */
+
+    if (conf->req && r->parsed_uri.scheme) {
+        /* but it might be something vhosted */
+        if (!(r->parsed_uri.hostname
+              && !strcasecmp(r->parsed_uri.scheme, ap_http_scheme(r))
+              && ap_matches_request_vhost(r, r->parsed_uri.hostname,
+                                          (apr_port_t)(r->parsed_uri.port_str ? r->parsed_uri.port
+                                                       : ap_default_port(r))))) {
+            r->proxyreq = PROXYREQ_PROXY;
+            r->uri = r->unparsed_uri;
+            r->filename = apr_pstrcat(r->pool, "proxy:", r->uri, NULL);
+            r->handler = "proxy-server";
+        }
+    }
+    /* We need special treatment for CONNECT proxying: it has no scheme part */
+    else if (conf->req && r->method_number == M_CONNECT
+             && r->parsed_uri.hostname
+             && r->parsed_uri.port_str) {
+        r->proxyreq = PROXYREQ_PROXY;
+        r->uri = r->unparsed_uri;
+        r->filename = apr_pstrcat(r->pool, "proxy:", r->uri, NULL);
+        r->handler = "proxy-server";
+    }
+    return DECLINED;
+}
+
+static const char *proxy_interpolate(request_rec *r, const char *str)
+{
+    /* Interpolate an env str in a configuration string
+     * Syntax ${var} --> value_of(var)
+     * Method: replace one var, and recurse on remainder of string
+     * Nothing clever here, and crap like nested vars may do silly things
+     * but we'll at least avoid sending the unwary into a loop
+     */
+    const char *start;
+    const char *end;
+    const char *var;
+    const char *val;
+    const char *firstpart;
+
+    start = ap_strstr_c(str, "${");
+    if (start == NULL) {
+        return str;
+    }
+    end = ap_strchr_c(start+2, '}');
+    if (end == NULL) {
+        return str;
+    }
+    /* OK, this is syntax we want to interpolate.  Is there such a var ? */
+    var = apr_pstrmemdup(r->pool, start+2, end-(start+2));
+    val = apr_table_get(r->subprocess_env, var);
+    firstpart = apr_pstrmemdup(r->pool, str, (start-str));
+
+    if (val == NULL) {
+        return apr_pstrcat(r->pool, firstpart,
+                           proxy_interpolate(r, end+1), NULL);
+    }
+    else {
+        return apr_pstrcat(r->pool, firstpart, val,
+                           proxy_interpolate(r, end+1), NULL);
+    }
+}
+static apr_array_header_t *proxy_vars(request_rec *r,
+                                      apr_array_header_t *hdr)
+{
+    int i;
+    apr_array_header_t *ret = apr_array_make(r->pool, hdr->nelts,
+                                             sizeof (struct proxy_alias));
+    struct proxy_alias *old = (struct proxy_alias *) hdr->elts;
+
+    for (i = 0; i < hdr->nelts; ++i) {
+        struct proxy_alias *newcopy = apr_array_push(ret);
+        newcopy->fake = (old[i].flags & PROXYPASS_INTERPOLATE)
+                        ? proxy_interpolate(r, old[i].fake) : old[i].fake;
+        newcopy->real = (old[i].flags & PROXYPASS_INTERPOLATE)
+                        ? proxy_interpolate(r, old[i].real) : old[i].real;
+    }
+    return ret;
+}
+
+PROXY_DECLARE(int) ap_proxy_trans_match(request_rec *r, struct proxy_alias *ent,
+                                        proxy_dir_conf *dconf)
+{
+    int len;
+    const char *fake;
+    const char *real;
+    ap_regmatch_t regm[AP_MAX_REG_MATCH];
+    ap_regmatch_t reg1[AP_MAX_REG_MATCH];
+    char *found = NULL;
+    int mismatch = 0;
+    unsigned int nocanon = ent->flags & PROXYPASS_NOCANON;
+    const char *use_uri = nocanon ? r->unparsed_uri : r->uri;
+
+    if (dconf && (dconf->interpolate_env == 1) && (ent->flags & PROXYPASS_INTERPOLATE)) {
+        fake = proxy_interpolate(r, ent->fake);
+        real = proxy_interpolate(r, ent->real);
+    }
+    else {
+        fake = ent->fake;
+        real = ent->real;
+    }
+
+    ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, APLOGNO(03461)
+                  "attempting to match URI path '%s' against %s '%s' for "
+                  "proxying", r->uri, (ent->regex ? "pattern" : "prefix"),
+                  fake);
+
+    if (ent->regex) {
+        if (!ap_regexec(ent->regex, r->uri, AP_MAX_REG_MATCH, regm, 0)) {
+            if ((real[0] == '!') && (real[1] == '\0')) {
+                ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03462)
+                              "proxying is explicitly disabled for URI path "
+                              "'%s'; declining", r->uri);
+                return DECLINED;
+            }
+            /* test that we haven't reduced the URI */
+            if (nocanon && ap_regexec(ent->regex, r->unparsed_uri,
+                    AP_MAX_REG_MATCH, reg1, 0)) {
+                mismatch = 1;
+                use_uri = r->uri;
+            }
+            found = ap_pregsub(r->pool, real, use_uri, AP_MAX_REG_MATCH,
+                    (use_uri == r->uri) ? regm : reg1);
+            if (!found) {
+                ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, APLOGNO(01135)
+                              "Substitution in regular expression failed. "
+                              "Replacement too long?");
+                return HTTP_INTERNAL_SERVER_ERROR;
+            }
+
+            /* Note: The strcmp() below catches cases where there
+             * was no regex substitution. This is so cases like:
+             *
+             *    ProxyPassMatch \.gif balancer://foo
+             *
+             * will work "as expected". The upshot is that the 2
+             * directives below act the exact same way (ie: $1 is implied):
+             *
+             *    ProxyPassMatch ^(/.*\.gif)$ balancer://foo
+             *    ProxyPassMatch ^(/.*\.gif)$ balancer://foo$1
+             *
+             * which may be confusing.
+             */
+            if (strcmp(found, real) != 0) {
+                found = apr_pstrcat(r->pool, "proxy:", found, NULL);
+            }
+            else {
+                found = apr_pstrcat(r->pool, "proxy:", real, use_uri, NULL);
+            }
+        }
+    }
+    else {
+        len = alias_match(r->uri, fake);
+
+        if (len != 0) {
+            if ((real[0] == '!') && (real[1] == '\0')) {
+                ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03463)
+                              "proxying is explicitly disabled for URI path "
+                              "'%s'; declining", r->uri);
+                return DECLINED;
+            }
+            if (nocanon && len != alias_match(r->unparsed_uri, ent->fake)) {
+                mismatch = 1;
+                use_uri = r->uri;
+            }
+            found = apr_pstrcat(r->pool, "proxy:", real, use_uri + len, NULL);
+        }
+    }
+    if (mismatch) {
+        /* We made a reducing transformation, so we can't safely use
+         * unparsed_uri.  Safe fallback is to ignore nocanon.
+         */
+        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01136)
+                "Unescaped URL path matched ProxyPass; ignoring unsafe nocanon");
+    }
+
+    if (found) {
+        r->filename = found;
+        r->handler = "proxy-server";
+        r->proxyreq = PROXYREQ_REVERSE;
+        if (nocanon && !mismatch) {
+            /* mod_proxy_http needs to be told.  Different module. */
+            apr_table_setn(r->notes, "proxy-nocanon", "1");
+        }
+        if (ent->flags & PROXYPASS_NOQUERY) {
+            apr_table_setn(r->notes, "proxy-noquery", "1");
+        }
+
+        ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03464)
+                      "URI path '%s' matches proxy handler '%s'", r->uri,
+                      found);
+
+        return OK;
+    }
+
+    return DONE;
+}
+
+static int proxy_trans(request_rec *r)
+{
+    int i;
+    struct proxy_alias *ent;
+    proxy_dir_conf *dconf;
+    proxy_server_conf *conf;
+
+    if (r->proxyreq) {
+        /* someone has already set up the proxy, it was possibly ourselves
+         * in proxy_detect
+         */
+        return OK;
+    }
+
+    if ((r->unparsed_uri[0] == '*' && r->unparsed_uri[1] == '\0')
+        || !r->uri || r->uri[0] != '/') {
+        return DECLINED;
+    }
+   
+    if (apr_table_get(r->subprocess_env, "no-proxy")) { 
+        return DECLINED;
+    }
+
+    /* XXX: since r->uri has been manipulated already we're not really
+     * compliant with RFC1945 at this point.  But this probably isn't
+     * an issue because this is a hybrid proxy/origin server.
+     */
+
+    dconf = ap_get_module_config(r->per_dir_config, &proxy_module);
+
+    /* short way - this location is reverse proxied? */
+    if (dconf->alias) {
+        int rv = ap_proxy_trans_match(r, dconf->alias, dconf);
+        if (DONE != rv) {
+            return rv;
+        }
+    }
+
+    conf = (proxy_server_conf *) ap_get_module_config(r->server->module_config,
+                                                      &proxy_module);
+
+    /* long way - walk the list of aliases, find a match */
+    if (conf->aliases->nelts) {
+        ent = (struct proxy_alias *) conf->aliases->elts;
+        for (i = 0; i < conf->aliases->nelts; i++) {
+            int rv = ap_proxy_trans_match(r, &ent[i], dconf);
+            if (DONE != rv) {
+                return rv;
+            }
+        }
+    }
+    return DECLINED;
+}
+
+static int proxy_walk(request_rec *r)
+{
+    proxy_server_conf *sconf = ap_get_module_config(r->server->module_config,
+                                                    &proxy_module);
+    ap_conf_vector_t *per_dir_defaults = r->per_dir_config;
+    ap_conf_vector_t **sec_proxy = (ap_conf_vector_t **) sconf->sec_proxy->elts;
+    ap_conf_vector_t *entry_config;
+    proxy_dir_conf *entry_proxy;
+    int num_sec = sconf->sec_proxy->nelts;
+    /* XXX: shouldn't we use URI here?  Canonicalize it first?
+     * Pass over "proxy:" prefix
+     */
+    const char *proxyname = r->filename + 6;
+    int j;
+    apr_pool_t *rxpool = NULL;
+
+    for (j = 0; j < num_sec; ++j)
+    {
+        int nmatch = 0;
+        int i;
+        ap_regmatch_t *pmatch = NULL;
+
+        entry_config = sec_proxy[j];
+        entry_proxy = ap_get_module_config(entry_config, &proxy_module);
+
+        if (entry_proxy->r) {
+
+            if (entry_proxy->refs && entry_proxy->refs->nelts) {
+                if (!rxpool) {
+                    apr_pool_create(&rxpool, r->pool);
+                }
+                nmatch = entry_proxy->refs->nelts;
+                pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t));
+            }
+
+            if (ap_regexec(entry_proxy->r, proxyname, nmatch, pmatch, 0)) {
+                continue;
+            }
+
+            for (i = 0; i < nmatch; i++) {
+                if (pmatch[i].rm_so >= 0 && pmatch[i].rm_eo >= 0 &&
+                        ((const char **)entry_proxy->refs->elts)[i]) {
+                    apr_table_setn(r->subprocess_env,
+                            ((const char **)entry_proxy->refs->elts)[i],
+                            apr_pstrndup(r->pool,
+                                    proxyname + pmatch[i].rm_so,
+                                    pmatch[i].rm_eo - pmatch[i].rm_so));
+                }
+            }
+        }
+
+        else if (
+            /* XXX: What about case insensitive matching ???
+             * Compare regex, fnmatch or string as appropriate
+             * If the entry doesn't relate, then continue
+             */
+            entry_proxy->p_is_fnmatch ? apr_fnmatch(entry_proxy->p,
+                    proxyname, 0) :
+                    strncmp(proxyname, entry_proxy->p,
+                            strlen(entry_proxy->p))) {
+            continue;
+        }
+        per_dir_defaults = ap_merge_per_dir_configs(r->pool, per_dir_defaults,
+                                                             entry_config);
+    }
+
+    r->per_dir_config = per_dir_defaults;
+
+    if (rxpool) {
+        apr_pool_destroy(rxpool);
+    }
+
+    return OK;
+}
+
+static int proxy_map_location(request_rec *r)
+{
+    int access_status;
+
+    if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0)
+        return DECLINED;
+
+    /* Don't let the core or mod_http map_to_storage hooks handle this,
+     * We don't need directory/file_walk, and we want to TRACE on our own.
+     */
+    if ((access_status = proxy_walk(r))) {
+        ap_die(access_status, r);
+        return access_status;
+    }
+
+    return OK;
+}
+
+/* -------------------------------------------------------------- */
+/* Fixup the filename */
+
+/*
+ * Canonicalise the URL
+ */
+static int proxy_fixup(request_rec *r)
+{
+    char *url, *p;
+    int access_status;
+    proxy_dir_conf *dconf = ap_get_module_config(r->per_dir_config,
+                                                 &proxy_module);
+
+    if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0)
+        return DECLINED;
+
+    /* XXX: Shouldn't we try this before we run the proxy_walk? */
+    url = &r->filename[6];
+
+    if ((dconf->interpolate_env == 1) && (r->proxyreq == PROXYREQ_REVERSE)) {
+        /* create per-request copy of reverse proxy conf,
+         * and interpolate vars in it
+         */
+        proxy_req_conf *rconf = apr_palloc(r->pool, sizeof(proxy_req_conf));
+        ap_set_module_config(r->request_config, &proxy_module, rconf);
+        rconf->raliases = proxy_vars(r, dconf->raliases);
+        rconf->cookie_paths = proxy_vars(r, dconf->cookie_paths);
+        rconf->cookie_domains = proxy_vars(r, dconf->cookie_domains);
+    }
+
+    /* canonicalise each specific scheme */
+    if ((access_status = proxy_run_canon_handler(r, url))) {
+        return access_status;
+    }
+
+    p = strchr(url, ':');
+    if (p == NULL || p == url)
+        return HTTP_BAD_REQUEST;
+
+    return OK;      /* otherwise; we've done the best we can */
+}
+/* Send a redirection if the request contains a hostname which is not */
+/* fully qualified, i.e. doesn't have a domain name appended. Some proxy */
+/* servers like Netscape's allow this and access hosts from the local */
+/* domain in this case. I think it is better to redirect to a FQDN, since */
+/* these will later be found in the bookmarks files. */
+/* The "ProxyDomain" directive determines what domain will be appended */
+static int proxy_needsdomain(request_rec *r, const char *url, const char *domain)
+{
+    char *nuri;
+    const char *ref;
+
+    /* We only want to worry about GETs */
+    if (!r->proxyreq || r->method_number != M_GET || !r->parsed_uri.hostname)
+        return DECLINED;
+
+    /* If host does contain a dot already, or it is "localhost", decline */
+    if (strchr(r->parsed_uri.hostname, '.') != NULL /* has domain, or IPv4 literal */
+     || strchr(r->parsed_uri.hostname, ':') != NULL /* IPv6 literal */
+     || strcasecmp(r->parsed_uri.hostname, "localhost") == 0)
+        return DECLINED;    /* host name has a dot already */
+
+    ref = apr_table_get(r->headers_in, "Referer");
+
+    /* Reassemble the request, but insert the domain after the host name */
+    /* Note that the domain name always starts with a dot */
+    r->parsed_uri.hostname = apr_pstrcat(r->pool, r->parsed_uri.hostname,
+                                         domain, NULL);
+    nuri = apr_uri_unparse(r->pool,
+                           &r->parsed_uri,
+                           APR_URI_UNP_REVEALPASSWORD);
+
+    apr_table_setn(r->headers_out, "Location", nuri);
+    ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(01138)
+                  "Domain missing: %s sent to %s%s%s", r->uri,
+                  apr_uri_unparse(r->pool, &r->parsed_uri,
+                                  APR_URI_UNP_OMITUSERINFO),
+                  ref ? " from " : "", ref ? ref : "");
+
+    return HTTP_MOVED_PERMANENTLY;
+}
+
+/* -------------------------------------------------------------- */
+/* Invoke handler */
+
+static int proxy_handler(request_rec *r)
+{
+    char *uri, *scheme, *p;
+    const char *p2;
+    void *sconf = r->server->module_config;
+    proxy_server_conf *conf = (proxy_server_conf *)
+        ap_get_module_config(sconf, &proxy_module);
+    apr_array_header_t *proxies = conf->proxies;
+    struct proxy_remote *ents = (struct proxy_remote *) proxies->elts;
+    int i, rc, access_status;
+    int direct_connect = 0;
+    const char *str;
+    apr_int64_t maxfwd;
+    proxy_balancer *balancer = NULL;
+    proxy_worker *worker = NULL;
+    int attempts = 0, max_attempts = 0;
+    struct dirconn_entry *list = (struct dirconn_entry *)conf->dirconn->elts;
+    int saved_status;
+
+    /* is this for us? */
+    if (!r->filename) {
+        return DECLINED;
+    }
+
+    if (!r->proxyreq) {
+        /* We may have forced the proxy handler via config or .htaccess */
+        if (r->handler &&
+            strncmp(r->handler, "proxy:", 6) == 0 &&
+            strncmp(r->filename, "proxy:", 6) != 0) {
+            r->proxyreq = PROXYREQ_REVERSE;
+            r->filename = apr_pstrcat(r->pool, r->handler, r->filename, NULL);
+        }
+        else {
+            return DECLINED;
+        }
+    } else if (strncmp(r->filename, "proxy:", 6) != 0) {
+        return DECLINED;
+    }
+
+    /* handle max-forwards / OPTIONS / TRACE */
+    if ((str = apr_table_get(r->headers_in, "Max-Forwards"))) {
+        char *end;
+        maxfwd = apr_strtoi64(str, &end, 10);
+        if (maxfwd < 0 || maxfwd == APR_INT64_MAX || *end) {
+            return ap_proxyerror(r, HTTP_BAD_REQUEST,
+                    apr_psprintf(r->pool,
+                            "Max-Forwards value '%s' could not be parsed", str));
+        }
+        else if (maxfwd == 0) {
+            switch (r->method_number) {
+            case M_TRACE: {
+                int access_status;
+                r->proxyreq = PROXYREQ_NONE;
+                access_status = ap_send_http_trace(r);
+                ap_die(access_status, r);
+                return OK;
+            }
+            case M_OPTIONS: {
+                int access_status;
+                r->proxyreq = PROXYREQ_NONE;
+                access_status = ap_send_http_options(r);
+                ap_die(access_status, r);
+                return OK;
+            }
+            default: {
+                return ap_proxyerror(r, HTTP_BAD_REQUEST,
+                                     "Max-Forwards has reached zero - proxy loop?");
+            }
+            }
+        }
+        maxfwd = (maxfwd > 0) ? maxfwd - 1 : 0;
+    }
+    else {
+        /* set configured max-forwards */
+        maxfwd = conf->maxfwd;
+    }
+    if (maxfwd >= 0) {
+        apr_table_setn(r->headers_in, "Max-Forwards",
+                       apr_psprintf(r->pool, "%" APR_INT64_T_FMT, maxfwd));
+    }
+
+    if (r->method_number == M_TRACE) {
+        core_server_config *coreconf = (core_server_config *)
+                                       ap_get_core_module_config(sconf);
+
+        if (coreconf->trace_enable == AP_TRACE_DISABLE)
+        {
+            /* Allow "error-notes" string to be printed by ap_send_error_response()
+             * Note; this goes nowhere, canned error response need an overhaul.
+             */
+            apr_table_setn(r->notes, "error-notes",
+                           "TRACE forbidden by server configuration");
+            apr_table_setn(r->notes, "verbose-error-to", "*");
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01139)
+                          "TRACE forbidden by server configuration");
+            return HTTP_METHOD_NOT_ALLOWED;
+        }
+
+        /* Can't test ap_should_client_block, we aren't ready to send
+         * the client a 100 Continue response till the connection has
+         * been established
+         */
+        if (coreconf->trace_enable != AP_TRACE_EXTENDED
+            && (r->read_length || r->read_chunked || r->remaining))
+        {
+            /* Allow "error-notes" string to be printed by ap_send_error_response()
+             * Note; this goes nowhere, canned error response need an overhaul.
+             */
+            apr_table_setn(r->notes, "error-notes",
+                           "TRACE with request body is not allowed");
+            apr_table_setn(r->notes, "verbose-error-to", "*");
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01140)
+                          "TRACE with request body is not allowed");
+            return HTTP_REQUEST_ENTITY_TOO_LARGE;
+        }
+    }
+
+    uri = r->filename + 6;
+    p = strchr(uri, ':');
+    if (p == NULL) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01141)
+                      "proxy_handler no URL in %s", r->filename);
+        return HTTP_BAD_REQUEST;
+    }
+
+    /* If the host doesn't have a domain name, add one and redirect. */
+    if (conf->domain != NULL) {
+        rc = proxy_needsdomain(r, uri, conf->domain);
+        if (ap_is_HTTP_REDIRECT(rc))
+            return HTTP_MOVED_PERMANENTLY;
+    }
+
+    scheme = apr_pstrmemdup(r->pool, uri, p - uri);
+    /* Check URI's destination host against NoProxy hosts */
+    /* Bypass ProxyRemote server lookup if configured as NoProxy */
+    for (direct_connect = i = 0; i < conf->dirconn->nelts &&
+                                        !direct_connect; i++) {
+        direct_connect = list[i].matcher(&list[i], r);
+    }
+#if DEBUGGING
+    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                (direct_connect) ? APLOGNO(03231) "NoProxy for %s" : APLOGNO(03232) "UseProxy for %s",
+                r->uri);
+#endif
+
+    do {
+        char *url = uri;
+        /* Try to obtain the most suitable worker */
+        access_status = ap_proxy_pre_request(&worker, &balancer, r, conf, &url);
+        if (access_status != OK) {
+            /*
+             * Only return if access_status is not HTTP_SERVICE_UNAVAILABLE
+             * This gives other modules the chance to hook into the
+             * request_status hook and decide what to do in this situation.
+             */
+            if (access_status != HTTP_SERVICE_UNAVAILABLE)
+                return access_status;
+            /*
+             * Ensure that balancer is NULL if worker is NULL to prevent
+             * potential problems in the post_request hook.
+             */
+            if (!worker)
+                balancer = NULL;
+            goto cleanup;
+        }
+
+        /* Initialise worker if needed, note the shared area must be initialized by the balancer logic */
+        if (balancer) {
+            ap_proxy_initialize_worker(worker, r->server, conf->pool);
+        }
+
+        if (balancer && balancer->s->max_attempts_set && !max_attempts)
+            max_attempts = balancer->s->max_attempts;
+        /* firstly, try a proxy, unless a NoProxy directive is active */
+        if (!direct_connect) {
+            for (i = 0; i < proxies->nelts; i++) {
+                p2 = ap_strchr_c(ents[i].scheme, ':');  /* is it a partial URL? */
+                if (strcmp(ents[i].scheme, "*") == 0 ||
+                    (ents[i].use_regex &&
+                     ap_regexec(ents[i].regexp, url, 0, NULL, 0) == 0) ||
+                    (p2 == NULL && strcasecmp(scheme, ents[i].scheme) == 0) ||
+                    (p2 != NULL &&
+                    strncasecmp(url, ents[i].scheme,
+                                strlen(ents[i].scheme)) == 0)) {
+
+                    /* handle the scheme */
+                    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01142)
+                                  "Trying to run scheme_handler against proxy");
+                    access_status = proxy_run_scheme_handler(r, worker,
+                                                             conf, url,
+                                                             ents[i].hostname,
+                                                             ents[i].port);
+
+                    /* Did the scheme handler process the request? */
+                    if (access_status != DECLINED) {
+                        const char *cl_a;
+                        char *end;
+                        apr_off_t cl;
+
+                        /*
+                         * An fatal error or success, so no point in
+                         * retrying with a direct connection.
+                         */
+                        if (access_status != HTTP_BAD_GATEWAY) {
+                            goto cleanup;
+                        }
+                        cl_a = apr_table_get(r->headers_in, "Content-Length");
+                        if (cl_a) {
+                            apr_strtoff(&cl, cl_a, &end, 10);
+                            /*
+                             * The request body is of length > 0. We cannot
+                             * retry with a direct connection since we already
+                             * sent (parts of) the request body to the proxy
+                             * and do not have any longer.
+                             */
+                            if (cl > 0) {
+                                goto cleanup;
+                            }
+                        }
+                        /*
+                         * Transfer-Encoding was set as input header, so we had
+                         * a request body. We cannot retry with a direct
+                         * connection for the same reason as above.
+                         */
+                        if (apr_table_get(r->headers_in, "Transfer-Encoding")) {
+                            goto cleanup;
+                        }
+                    }
+                }
+            }
+        }
+
+        /* otherwise, try it direct */
+        /* N.B. what if we're behind a firewall, where we must use a proxy or
+        * give up??
+        */
+
+        /* handle the scheme */
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01143)
+                      "Running scheme %s handler (attempt %d)",
+                      scheme, attempts);
+        AP_PROXY_RUN(r, worker, conf, url, attempts);
+        access_status = proxy_run_scheme_handler(r, worker, conf,
+                                                 url, NULL, 0);
+        if (access_status == OK
+                || apr_table_get(r->notes, "proxy-error-override"))
+            break;
+        else if (access_status == HTTP_INTERNAL_SERVER_ERROR) {
+            /* Unrecoverable server error.
+             * We can not failover to another worker.
+             * Mark the worker as unusable if member of load balancer
+             */
+            if (balancer
+                && !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) {
+                worker->s->status |= PROXY_WORKER_IN_ERROR;
+                worker->s->error_time = apr_time_now();
+            }
+            break;
+        }
+        else if (access_status == HTTP_SERVICE_UNAVAILABLE) {
+            /* Recoverable server error.
+             * We can failover to another worker
+             * Mark the worker as unusable if member of load balancer
+             */
+            if (balancer
+                && !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) {
+                worker->s->status |= PROXY_WORKER_IN_ERROR;
+                worker->s->error_time = apr_time_now();
+            }
+        }
+        else {
+            /* Unrecoverable error.
+             * Return the origin status code to the client.
+             */
+            break;
+        }
+        /* Try again if the worker is unusable and the service is
+         * unavailable.
+         */
+    } while (!PROXY_WORKER_IS_USABLE(worker) &&
+             max_attempts > attempts++);
+
+    if (DECLINED == access_status) {
+        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01144)
+                      "No protocol handler was valid for the URL %s " 
+                      "(scheme '%s'). "
+                      "If you are using a DSO version of mod_proxy, make sure "
+                      "the proxy submodules are included in the configuration "
+                      "using LoadModule.", r->uri, scheme);
+        access_status = HTTP_INTERNAL_SERVER_ERROR;
+        goto cleanup;
+    }
+cleanup:
+    /*
+     * Save current r->status and set it to the value of access_status which
+     * might be different (e.g. r->status could be HTTP_OK if e.g. we override
+     * the error page on the proxy or if the error was not generated by the
+     * backend itself but by the proxy e.g. a bad gateway) in order to give
+     * ap_proxy_post_request a chance to act correctly on the status code.
+     * But only do the above if access_status is not OK and not DONE, because
+     * in this case r->status might contain the true status and overwriting
+     * it with OK or DONE would be wrong.
+     */
+    if ((access_status != OK) && (access_status != DONE)) {
+        saved_status = r->status;
+        r->status = access_status;
+        ap_proxy_post_request(worker, balancer, r, conf);
+        /*
+         * Only restore r->status if it has not been changed by
+         * ap_proxy_post_request as we assume that this change was intentional.
+         */
+        if (r->status == access_status) {
+            r->status = saved_status;
+        }
+    }
+    else {
+        ap_proxy_post_request(worker, balancer, r, conf);
+    }
+
+    proxy_run_request_status(&access_status, r);
+    AP_PROXY_RUN_FINISHED(r, attempts, access_status);
+
+    return access_status;
+}
+
+/* -------------------------------------------------------------- */
+/* Setup configurable data */
+
+static void * create_proxy_config(apr_pool_t *p, server_rec *s)
+{
+    proxy_server_conf *ps = apr_pcalloc(p, sizeof(proxy_server_conf));
+
+    ps->sec_proxy = apr_array_make(p, 10, sizeof(ap_conf_vector_t *));
+    ps->proxies = apr_array_make(p, 10, sizeof(struct proxy_remote));
+    ps->aliases = apr_array_make(p, 10, sizeof(struct proxy_alias));
+    ps->noproxies = apr_array_make(p, 10, sizeof(struct noproxy_entry));
+    ps->dirconn = apr_array_make(p, 10, sizeof(struct dirconn_entry));
+    ps->workers = apr_array_make(p, 10, sizeof(proxy_worker));
+    ps->balancers = apr_array_make(p, 10, sizeof(proxy_balancer));
+    ps->forward = NULL;
+    ps->reverse = NULL;
+    ps->domain = NULL;
+    ps->id = apr_psprintf(p, "p%x", 1); /* simply for storage size */
+    ps->viaopt = via_off; /* initially backward compatible with 1.3.1 */
+    ps->viaopt_set = 0; /* 0 means default */
+    ps->req = 0;
+    ps->max_balancers = 0;
+    ps->bal_persist = 0;
+    ps->inherit = 1;
+    ps->inherit_set = 0;
+    ps->ppinherit = 1;
+    ps->ppinherit_set = 0;
+    ps->bgrowth = 5;
+    ps->bgrowth_set = 0;
+    ps->req_set = 0;
+    ps->recv_buffer_size = 0; /* this default was left unset for some reason */
+    ps->recv_buffer_size_set = 0;
+    ps->io_buffer_size = AP_IOBUFSIZE;
+    ps->io_buffer_size_set = 0;
+    ps->maxfwd = DEFAULT_MAX_FORWARDS;
+    ps->maxfwd_set = 0;
+    ps->timeout = 0;
+    ps->timeout_set = 0;
+    ps->badopt = bad_error;
+    ps->badopt_set = 0;
+    ps->source_address = NULL;
+    ps->source_address_set = 0;
+    apr_pool_create_ex(&ps->pool, p, NULL, NULL);
+
+    return ps;
+}
+
+static apr_array_header_t *merge_balancers(apr_pool_t *p,
+                                           apr_array_header_t *base,
+                                           apr_array_header_t *overrides)
+{
+    proxy_balancer *b1;
+    proxy_balancer *b2;
+    proxy_balancer tmp;
+    int x, y, found;
+    apr_array_header_t *tocopy = apr_array_make(p, 1, sizeof(proxy_balancer));
+
+    /* Check if the balancer is defined in both override and base configs:
+     * a) If it is, Create copy of base balancer and change the configuration
+     *    which can be changed by ProxyPass.
+     * b) Otherwise, copy the balancer to tocopy array and merge it later.
+     */
+    b1 = (proxy_balancer *) base->elts;
+    for (y = 0; y < base->nelts; y++) {
+        b2 = (proxy_balancer *) overrides->elts;
+        for (x = 0, found = 0; x < overrides->nelts; x++) {
+            if (b1->hash.def == b2->hash.def && b1->hash.fnv == b2->hash.fnv) {
+                tmp = *b2;
+                *b2 = *b1;
+                b2->s = tmp.s;
+
+                /* For shared memory entries, b2->s belongs to override
+                 * balancer, so if some entry is not set there, we have to
+                 * update it according to the base balancer. */
+                if (*b2->s->sticky == 0 && *b1->s->sticky) {
+                    PROXY_STRNCPY(b2->s->sticky_path, b1->s->sticky_path);
+                    PROXY_STRNCPY(b2->s->sticky, b1->s->sticky);
+                }
+                if (!b2->s->sticky_separator_set
+                    && b1->s->sticky_separator_set) {
+                    b2->s->sticky_separator_set = b1->s->sticky_separator_set;
+                    b2->s->sticky_separator = b1->s->sticky_separator;
+                }
+                if (!b2->s->timeout && b1->s->timeout) {
+                    b2->s->timeout = b1->s->timeout;
+                }
+                if (!b2->s->max_attempts_set && b1->s->max_attempts_set) {
+                    b2->s->max_attempts_set = b1->s->max_attempts_set;
+                    b2->s->max_attempts = b1->s->max_attempts;
+                }
+                if (!b2->s->nonce_set && b1->s->nonce_set) {
+                    b2->s->nonce_set = b1->s->nonce_set;
+                    PROXY_STRNCPY(b2->s->nonce, b1->s->nonce);
+                }
+                if (!b2->s->sticky_force_set && b1->s->sticky_force_set) {
+                    b2->s->sticky_force_set = b1->s->sticky_force_set;
+                    b2->s->sticky_force = b1->s->sticky_force;
+                }
+                if (!b2->s->scolonsep_set && b1->s->scolonsep_set) {
+                    b2->s->scolonsep_set = b1->s->scolonsep_set;
+                    b2->s->scolonsep = b1->s->scolonsep;
+                }
+                if (!b2->s->forcerecovery_set && b1->s->forcerecovery_set) {
+                    b2->s->forcerecovery_set = b1->s->forcerecovery_set;
+                    b2->s->forcerecovery = b1->s->forcerecovery;
+                }
+
+                /* For non-shared memory entries, b2 is copy of b1, so we have
+                 * to use tmp copy of b1 to detect changes done in override. */
+                if (tmp.lbmethod_set) {
+                    b2->lbmethod_set = tmp.lbmethod_set;
+                    b2->lbmethod = tmp.lbmethod;
+                }
+                if (tmp.growth_set) {
+                    b2->growth_set = tmp.growth_set;
+                    b2->growth = tmp.growth;
+                }
+                if (tmp.failontimeout_set) {
+                    b2->failontimeout_set = tmp.failontimeout_set;
+                    b2->failontimeout = tmp.failontimeout;
+                }
+                if (!apr_is_empty_array(tmp.errstatuses)) {
+                    apr_array_cat(tmp.errstatuses, b2->errstatuses);
+                    b2->errstatuses = tmp.errstatuses;
+                }
+
+                found = 1;
+                break;
+            }
+            b2++;
+        }
+        if (!found) {
+            *(proxy_balancer *)apr_array_push(tocopy) = *b1;
+        }
+        b1++;
+    }
+
+    return apr_array_append(p, tocopy, overrides);
+}
+
+static void * merge_proxy_config(apr_pool_t *p, void *basev, void *overridesv)
+{
+    proxy_server_conf *ps = apr_pcalloc(p, sizeof(proxy_server_conf));
+    proxy_server_conf *base = (proxy_server_conf *) basev;
+    proxy_server_conf *overrides = (proxy_server_conf *) overridesv;
+
+    ps->inherit = (overrides->inherit_set == 0) ? base->inherit : overrides->inherit;
+    ps->inherit_set = overrides->inherit_set || base->inherit_set;
+
+    ps->ppinherit = (overrides->ppinherit_set == 0) ? base->ppinherit : overrides->ppinherit;
+    ps->ppinherit_set = overrides->ppinherit_set || base->ppinherit_set;
+
+    if (ps->ppinherit) {
+        ps->proxies = apr_array_append(p, base->proxies, overrides->proxies);
+    }
+    else {
+        ps->proxies = overrides->proxies;
+    }
+    ps->sec_proxy = apr_array_append(p, base->sec_proxy, overrides->sec_proxy);
+    ps->aliases = apr_array_append(p, base->aliases, overrides->aliases);
+    ps->noproxies = apr_array_append(p, base->noproxies, overrides->noproxies);
+    ps->dirconn = apr_array_append(p, base->dirconn, overrides->dirconn);
+    if (ps->inherit || ps->ppinherit) {
+        ps->workers = apr_array_append(p, base->workers, overrides->workers);
+        ps->balancers = merge_balancers(p, base->balancers, overrides->balancers);
+    }
+    else {
+        ps->workers = overrides->workers;
+        ps->balancers = overrides->balancers;
+    }
+    ps->forward = overrides->forward ? overrides->forward : base->forward;
+    ps->reverse = overrides->reverse ? overrides->reverse : base->reverse;
+
+    ps->domain = (overrides->domain == NULL) ? base->domain : overrides->domain;
+    ps->id = (overrides->id == NULL) ? base->id : overrides->id;
+    ps->viaopt = (overrides->viaopt_set == 0) ? base->viaopt : overrides->viaopt;
+    ps->viaopt_set = overrides->viaopt_set || base->viaopt_set;
+    ps->req = (overrides->req_set == 0) ? base->req : overrides->req;
+    ps->req_set = overrides->req_set || base->req_set;
+    ps->bgrowth = (overrides->bgrowth_set == 0) ? base->bgrowth : overrides->bgrowth;
+    ps->bgrowth_set = overrides->bgrowth_set || base->bgrowth_set;
+    ps->max_balancers = overrides->max_balancers || base->max_balancers;
+    ps->bal_persist = overrides->bal_persist;
+    ps->recv_buffer_size = (overrides->recv_buffer_size_set == 0) ? base->recv_buffer_size : overrides->recv_buffer_size;
+    ps->recv_buffer_size_set = overrides->recv_buffer_size_set || base->recv_buffer_size_set;
+    ps->io_buffer_size = (overrides->io_buffer_size_set == 0) ? base->io_buffer_size : overrides->io_buffer_size;
+    ps->io_buffer_size_set = overrides->io_buffer_size_set || base->io_buffer_size_set;
+    ps->maxfwd = (overrides->maxfwd_set == 0) ? base->maxfwd : overrides->maxfwd;
+    ps->maxfwd_set = overrides->maxfwd_set || base->maxfwd_set;
+    ps->timeout = (overrides->timeout_set == 0) ? base->timeout : overrides->timeout;
+    ps->timeout_set = overrides->timeout_set || base->timeout_set;
+    ps->badopt = (overrides->badopt_set == 0) ? base->badopt : overrides->badopt;
+    ps->badopt_set = overrides->badopt_set || base->badopt_set;
+    ps->proxy_status = (overrides->proxy_status_set == 0) ? base->proxy_status : overrides->proxy_status;
+    ps->proxy_status_set = overrides->proxy_status_set || base->proxy_status_set;
+    ps->source_address = (overrides->source_address_set == 0) ? base->source_address : overrides->source_address;
+    ps->source_address_set = overrides->source_address_set || base->source_address_set;
+    ps->pool = base->pool;
+    return ps;
+}
+static const char *set_source_address(cmd_parms *parms, void *dummy,
+                                      const char *arg)
+{
+    proxy_server_conf *psf =
+        ap_get_module_config(parms->server->module_config, &proxy_module);
+    struct apr_sockaddr_t *addr;
+
+    if (APR_SUCCESS == apr_sockaddr_info_get(&addr, arg, APR_UNSPEC, 0, 0,
+                                             psf->pool)) {
+        psf->source_address = addr;
+        psf->source_address_set = 1;
+    }
+    else {
+        return "ProxySourceAddress invalid value";
+    }
+
+    return NULL;
+}
+
+static void *create_proxy_dir_config(apr_pool_t *p, char *dummy)
+{
+    proxy_dir_conf *new =
+        (proxy_dir_conf *) apr_pcalloc(p, sizeof(proxy_dir_conf));
+
+    /* Filled in by proxysection, when applicable */
+
+    /* Put these in the dir config so they work inside <Location> */
+    new->raliases = apr_array_make(p, 10, sizeof(struct proxy_alias));
+    new->cookie_paths = apr_array_make(p, 10, sizeof(struct proxy_alias));
+    new->cookie_domains = apr_array_make(p, 10, sizeof(struct proxy_alias));
+    new->preserve_host_set = 0;
+    new->preserve_host = 0;
+    new->interpolate_env = -1; /* unset */
+    new->error_override = 0;
+    new->error_override_set = 0;
+    new->add_forwarded_headers = 1;
+    new->add_forwarded_headers_set = 0;
+
+    return (void *) new;
+}
+
+static void *merge_proxy_dir_config(apr_pool_t *p, void *basev, void *addv)
+{
+    proxy_dir_conf *new = (proxy_dir_conf *) apr_pcalloc(p, sizeof(proxy_dir_conf));
+    proxy_dir_conf *add = (proxy_dir_conf *) addv;
+    proxy_dir_conf *base = (proxy_dir_conf *) basev;
+
+    new->p = add->p;
+    new->p_is_fnmatch = add->p_is_fnmatch;
+    new->r = add->r;
+    new->refs = add->refs;
+
+    /* Put these in the dir config so they work inside <Location> */
+    new->raliases = apr_array_append(p, base->raliases, add->raliases);
+    new->cookie_paths
+        = apr_array_append(p, base->cookie_paths, add->cookie_paths);
+    new->cookie_domains
+        = apr_array_append(p, base->cookie_domains, add->cookie_domains);
+    new->interpolate_env = (add->interpolate_env == -1) ? base->interpolate_env
+                                                        : add->interpolate_env;
+    new->preserve_host = (add->preserve_host_set == 0) ? base->preserve_host
+                                                        : add->preserve_host;
+    new->preserve_host_set = add->preserve_host_set || base->preserve_host_set;
+    new->error_override = (add->error_override_set == 0) ? base->error_override
+                                                        : add->error_override;
+    new->error_override_set = add->error_override_set || base->error_override_set;
+    new->alias = (add->alias_set == 0) ? base->alias : add->alias;
+    new->alias_set = add->alias_set || base->alias_set;
+    new->add_forwarded_headers =
+        (add->add_forwarded_headers_set == 0) ? base->add_forwarded_headers
+        : add->add_forwarded_headers;
+    new->add_forwarded_headers_set = add->add_forwarded_headers_set
+        || base->add_forwarded_headers_set;
+    
+    return new;
+}
+
+static const char *
+    add_proxy(cmd_parms *cmd, void *dummy, const char *f1, const char *r1, int regex)
+{
+    server_rec *s = cmd->server;
+    proxy_server_conf *conf =
+    (proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module);
+    struct proxy_remote *new;
+    char *p, *q;
+    char *r, *f, *scheme;
+    ap_regex_t *reg = NULL;
+    int port;
+
+    r = apr_pstrdup(cmd->pool, r1);
+    scheme = apr_pstrdup(cmd->pool, r1);
+    f = apr_pstrdup(cmd->pool, f1);
+    p = strchr(r, ':');
+    if (p == NULL || p[1] != '/' || p[2] != '/' || p[3] == '\0') {
+        if (regex)
+            return "ProxyRemoteMatch: Bad syntax for a remote proxy server";
+        else
+            return "ProxyRemote: Bad syntax for a remote proxy server";
+    }
+    else {
+        scheme[p-r] = 0;
+    }
+    q = strchr(p + 3, ':');
+    if (q != NULL) {
+        if (sscanf(q + 1, "%u", &port) != 1 || port > 65535) {
+            if (regex)
+                return "ProxyRemoteMatch: Bad syntax for a remote proxy server (bad port number)";
+            else
+                return "ProxyRemote: Bad syntax for a remote proxy server (bad port number)";
+        }
+        *q = '\0';
+    }
+    else
+        port = -1;
+    *p = '\0';
+    if (regex) {
+        reg = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED);
+        if (!reg)
+            return "Regular expression for ProxyRemoteMatch could not be compiled.";
+    }
+    else
+        if (strchr(f, ':') == NULL)
+            ap_str_tolower(f);      /* lowercase scheme */
+    ap_str_tolower(p + 3);      /* lowercase hostname */
+
+    if (port == -1) {
+        port = apr_uri_port_of_scheme(scheme);
+    }
+
+    new = apr_array_push(conf->proxies);
+    new->scheme = f;
+    new->protocol = r;
+    new->hostname = p + 3;
+    new->port = port;
+    new->regexp = reg;
+    new->use_regex = regex;
+    return NULL;
+}
+
+static const char *
+    add_proxy_noregex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1)
+{
+    return add_proxy(cmd, dummy, f1, r1, 0);
+}
+
+static const char *
+    add_proxy_regex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1)
+{
+    return add_proxy(cmd, dummy, f1, r1, 1);
+}
+
+PROXY_DECLARE(const char *) ap_proxy_de_socketfy(apr_pool_t *p, const char *url)
+{
+    const char *ptr;
+    /*
+     * We could be passed a URL during the config stage that contains
+     * the UDS path... ignore it
+     */
+    if (!strncasecmp(url, "unix:", 5) &&
+        ((ptr = ap_strchr_c(url, '|')) != NULL)) {
+        /* move past the 'unix:...|' UDS path info */
+        const char *ret, *c;
+
+        ret = ptr + 1;
+        /* special case: "unix:....|scheme:" is OK, expand
+         * to "unix:....|scheme://localhost"
+         * */
+        c = ap_strchr_c(ret, ':');
+        if (c == NULL) {
+            return NULL;
+        }
+        if (c[1] == '\0') {
+            return apr_pstrcat(p, ret, "//localhost", NULL);
+        }
+        else {
+            return ret;
+        }
+    }
+    return url;
+}
+
+static const char *
+    add_pass(cmd_parms *cmd, void *dummy, const char *arg, int is_regex)
+{
+    proxy_dir_conf *dconf = (proxy_dir_conf *)dummy;
+    server_rec *s = cmd->server;
+    proxy_server_conf *conf =
+    (proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module);
+    struct proxy_alias *new;
+    char *f = cmd->path;
+    char *r = NULL;
+    char *word;
+    apr_table_t *params = apr_table_make(cmd->pool, 5);
+    const apr_array_header_t *arr;
+    const apr_table_entry_t *elts;
+    int i;
+    int use_regex = is_regex;
+    unsigned int flags = 0;
+    const char *err;
+
+    err = ap_check_cmd_context(cmd, NOT_IN_DIRECTORY|NOT_IN_FILES);
+    if (err) {
+        return err;
+    }
+
+    while (*arg) {
+        word = ap_getword_conf(cmd->pool, &arg);
+        if (!f) {
+            if (!strcmp(word, "~")) {
+                if (is_regex) {
+                    return "ProxyPassMatch invalid syntax ('~' usage).";
+                }
+                use_regex = 1;
+                continue;
+            }
+            f = word;
+        }
+        else if (!r) {
+            r = word;
+        }
+        else if (!strcasecmp(word,"nocanon")) {
+            flags |= PROXYPASS_NOCANON;
+        }
+        else if (!strcasecmp(word,"interpolate")) {
+            flags |= PROXYPASS_INTERPOLATE;
+        }
+        else if (!strcasecmp(word,"noquery")) {
+            flags |= PROXYPASS_NOQUERY;
+        }
+        else {
+            char *val = strchr(word, '=');
+            if (!val) {
+                if (cmd->path) {
+                    if (*r == '/') {
+                        return "ProxyPass|ProxyPassMatch can not have a path when defined in "
+                               "a location.";
+                    }
+                    else {
+                        return "Invalid ProxyPass|ProxyPassMatch parameter. Parameter must "
+                               "be in the form 'key=value'.";
+                    }
+                }
+                else {
+                    return "Invalid ProxyPass|ProxyPassMatch parameter. Parameter must be "
+                           "in the form 'key=value'.";
+                }
+            }
+            else
+                *val++ = '\0';
+            apr_table_setn(params, word, val);
+        }
+    };
+
+    if (r == NULL) {
+        return "ProxyPass|ProxyPassMatch needs a path when not defined in a location";
+    }
+
+    /* if per directory, save away the single alias */
+    if (cmd->path) {
+        dconf->alias = apr_pcalloc(cmd->pool, sizeof(struct proxy_alias));
+        dconf->alias_set = 1;
+        new = dconf->alias;
+        if (apr_fnmatch_test(f)) {
+            use_regex = 1;
+        }
+    }
+    /* if per server, add to the alias array */
+    else {
+        new = apr_array_push(conf->aliases);
+    }
+
+    new->fake = apr_pstrdup(cmd->pool, f);
+    new->real = apr_pstrdup(cmd->pool, ap_proxy_de_socketfy(cmd->pool, r));
+    new->flags = flags;
+    if (use_regex) {
+        new->regex = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED);
+        if (new->regex == NULL)
+            return "Regular expression could not be compiled.";
+    }
+    else {
+        new->regex = NULL;
+    }
+
+    if (r[0] == '!' && r[1] == '\0')
+        return NULL;
+
+    arr = apr_table_elts(params);
+    elts = (const apr_table_entry_t *)arr->elts;
+    /* Distinguish the balancer from worker */
+    if (ap_proxy_valid_balancer_name(r, 9)) {
+        proxy_balancer *balancer = ap_proxy_get_balancer(cmd->pool, conf, r, 0);
+        char *fake_copy;
+
+        /*
+         * In the regex case supplying a fake URL doesn't make sense as it
+         * cannot be parsed anyway with apr_uri_parse later on in
+         * ap_proxy_define_balancer / ap_proxy_update_balancer
+         */
+        if (use_regex) {
+            fake_copy = NULL;
+        }
+        else {
+            fake_copy = f;
+        }
+        if (!balancer) {
+            const char *err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, r, fake_copy, 0);
+            if (err)
+                return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
+        }
+        else {
+            ap_proxy_update_balancer(cmd->pool, balancer, fake_copy);
+        }
+        for (i = 0; i < arr->nelts; i++) {
+            const char *err = set_balancer_param(conf, cmd->pool, balancer, elts[i].key,
+                                                 elts[i].val);
+            if (err)
+                return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
+        }
+        new->balancer = balancer;
+    }
+    else {
+        proxy_worker *worker = ap_proxy_get_worker(cmd->temp_pool, NULL, conf, ap_proxy_de_socketfy(cmd->pool, r));
+        int reuse = 0;
+        if (!worker) {
+            const char *err = ap_proxy_define_worker(cmd->pool, &worker, NULL, conf, r, 0);
+            if (err)
+                return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
+
+            PROXY_COPY_CONF_PARAMS(worker, conf);
+        } else {
+            reuse = 1;
+            ap_log_error(APLOG_MARK, APLOG_INFO, 0, cmd->server, APLOGNO(01145)
+                         "Sharing worker '%s' instead of creating new worker '%s'",
+                         ap_proxy_worker_name(cmd->pool, worker), new->real);
+        }
+
+        for (i = 0; i < arr->nelts; i++) {
+            if (reuse) {
+                ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(01146)
+                             "Ignoring parameter '%s=%s' for worker '%s' because of worker sharing",
+                             elts[i].key, elts[i].val, ap_proxy_worker_name(cmd->pool, worker));
+            } else {
+                const char *err = set_worker_param(cmd->pool, s, worker, elts[i].key,
+                                                   elts[i].val);
+                if (err)
+                    return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL);
+            }
+        }
+    }
+    return NULL;
+}
+
+static const char *
+    add_pass_noregex(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    return add_pass(cmd, dummy, arg, 0);
+}
+
+static const char *
+    add_pass_regex(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    return add_pass(cmd, dummy, arg, 1);
+}
+
+
+static const char * add_pass_reverse(cmd_parms *cmd, void *dconf, const char *f,
+                                     const char *r, const char *i)
+{
+    proxy_dir_conf *conf = dconf;
+    struct proxy_alias *new;
+    const char *fake;
+    const char *real;
+    const char *interp;
+    const char *err;
+
+    err = ap_check_cmd_context(cmd, NOT_IN_DIRECTORY|NOT_IN_FILES);
+    if (err) {
+        return err;
+    }
+
+    if (cmd->path == NULL) {
+        if (r == NULL || !strcasecmp(r, "interpolate")) {
+            return "ProxyPassReverse needs a path when not defined in a location";
+        }
+        fake = f;
+        real = r;
+        interp = i;
+    }
+    else {
+        if (r && strcasecmp(r, "interpolate")) {
+            return "ProxyPassReverse can not have a path when defined in a location";
+        }
+        fake = cmd->path;
+        real = f;
+        interp = r;
+    }
+
+    new = apr_array_push(conf->raliases);
+    new->fake = fake;
+    new->real = real;
+    new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
+
+    return NULL;
+}
+static const char* cookie_path(cmd_parms *cmd, void *dconf, const char *f,
+                               const char *r, const char *interp)
+{
+    proxy_dir_conf *conf = dconf;
+    struct proxy_alias *new;
+
+    new = apr_array_push(conf->cookie_paths);
+    new->fake = f;
+    new->real = r;
+    new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
+
+    return NULL;
+}
+static const char* cookie_domain(cmd_parms *cmd, void *dconf, const char *f,
+                                 const char *r, const char *interp)
+{
+    proxy_dir_conf *conf = dconf;
+    struct proxy_alias *new;
+
+    new = apr_array_push(conf->cookie_domains);
+    new->fake = f;
+    new->real = r;
+    new->flags = interp ? PROXYPASS_INTERPOLATE : 0;
+    return NULL;
+}
+
+static const char *
+    set_proxy_exclude(cmd_parms *parms, void *dummy, const char *arg)
+{
+    server_rec *s = parms->server;
+    proxy_server_conf *conf =
+    ap_get_module_config(s->module_config, &proxy_module);
+    struct noproxy_entry *new;
+    struct noproxy_entry *list = (struct noproxy_entry *) conf->noproxies->elts;
+    struct apr_sockaddr_t *addr;
+    int found = 0;
+    int i;
+
+    /* Don't duplicate entries */
+    for (i = 0; i < conf->noproxies->nelts; i++) {
+        if (strcasecmp(arg, list[i].name) == 0) { /* ignore case for host names */
+            found = 1;
+            break;
+        }
+    }
+
+    if (!found) {
+        new = apr_array_push(conf->noproxies);
+        new->name = arg;
+        if (APR_SUCCESS == apr_sockaddr_info_get(&addr, new->name, APR_UNSPEC, 0, 0, parms->pool)) {
+            new->addr = addr;
+        }
+        else {
+            new->addr = NULL;
+        }
+    }
+    return NULL;
+}
+
+
+/* Similar to set_proxy_exclude(), but defining directly connected hosts,
+ * which should never be accessed via the configured ProxyRemote servers
+ */
+static const char *
+    set_proxy_dirconn(cmd_parms *parms, void *dummy, const char *arg)
+{
+    server_rec *s = parms->server;
+    proxy_server_conf *conf =
+    ap_get_module_config(s->module_config, &proxy_module);
+    struct dirconn_entry *New;
+    struct dirconn_entry *list = (struct dirconn_entry *) conf->dirconn->elts;
+    int found = 0;
+    int i;
+
+    /* Don't duplicate entries */
+    for (i = 0; i < conf->dirconn->nelts; i++) {
+        if (strcasecmp(arg, list[i].name) == 0) {
+            found = 1;
+            break;
+        }
+    }
+
+    if (!found) {
+        New = apr_array_push(conf->dirconn);
+        New->name = apr_pstrdup(parms->pool, arg);
+        New->hostaddr = NULL;
+
+        if (ap_proxy_is_ipaddr(New, parms->pool)) {
+#if DEBUGGING
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03018)
+                         "Parsed addr %s", inet_ntoa(New->addr));
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03019)
+                         "Parsed mask %s", inet_ntoa(New->mask));
+#endif
+        }
+        else if (ap_proxy_is_domainname(New, parms->pool)) {
+            ap_str_tolower(New->name);
+#if DEBUGGING
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03020)
+                         "Parsed domain %s", New->name);
+#endif
+        }
+        else if (ap_proxy_is_hostname(New, parms->pool)) {
+            ap_str_tolower(New->name);
+#if DEBUGGING
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03021)
+                         "Parsed host %s", New->name);
+#endif
+        }
+        else {
+            ap_proxy_is_word(New, parms->pool);
+#if DEBUGGING
+            fprintf(stderr, "Parsed word %s\n", New->name);
+#endif
+        }
+    }
+    return NULL;
+}
+
+static const char *
+    set_proxy_domain(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    if (arg[0] != '.')
+        return "ProxyDomain: domain name must start with a dot.";
+
+    psf->domain = arg;
+    return NULL;
+}
+
+static const char *
+    set_proxy_req(cmd_parms *parms, void *dummy, int flag)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    psf->req = flag;
+    psf->req_set = 1;
+    return NULL;
+}
+
+static const char *
+    set_proxy_error_override(cmd_parms *parms, void *dconf, int flag)
+{
+    proxy_dir_conf *conf = dconf;
+
+    conf->error_override = flag;
+    conf->error_override_set = 1;
+    return NULL;
+}
+static const char *
+   add_proxy_http_headers(cmd_parms *parms, void *dconf, int flag)
+{
+   proxy_dir_conf *conf = dconf;
+   conf->add_forwarded_headers = flag;
+   conf->add_forwarded_headers_set = 1;
+   return NULL;
+}
+static const char *
+    set_preserve_host(cmd_parms *parms, void *dconf, int flag)
+{
+    proxy_dir_conf *conf = dconf;
+
+    conf->preserve_host = flag;
+    conf->preserve_host_set = 1;
+    return NULL;
+}
+
+static const char *
+    set_recv_buffer_size(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+    int s = atoi(arg);
+    if (s < 512 && s != 0) {
+        return "ProxyReceiveBufferSize must be >= 512 bytes, or 0 for system default.";
+    }
+
+    psf->recv_buffer_size = s;
+    psf->recv_buffer_size_set = 1;
+    return NULL;
+}
+
+static const char *
+    set_io_buffer_size(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+    long s = atol(arg);
+    if (s < 512 && s) {
+        return "ProxyIOBufferSize must be >= 512 bytes, or 0 for system default.";
+    }
+    psf->io_buffer_size = (s ? s : AP_IOBUFSIZE);
+    psf->io_buffer_size_set = 1;
+    return NULL;
+}
+
+static const char *
+    set_max_forwards(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+    long s = atol(arg);
+
+    psf->maxfwd = s;
+    psf->maxfwd_set = 1;
+    return NULL;
+}
+static const char*
+    set_proxy_timeout(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+    int timeout;
+
+    timeout = atoi(arg);
+    if (timeout<1) {
+        return "Proxy Timeout must be at least 1 second.";
+    }
+    psf->timeout_set = 1;
+    psf->timeout = apr_time_from_sec(timeout);
+
+    return NULL;
+}
+
+static const char*
+    set_via_opt(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    if (strcasecmp(arg, "Off") == 0)
+        psf->viaopt = via_off;
+    else if (strcasecmp(arg, "On") == 0)
+        psf->viaopt = via_on;
+    else if (strcasecmp(arg, "Block") == 0)
+        psf->viaopt = via_block;
+    else if (strcasecmp(arg, "Full") == 0)
+        psf->viaopt = via_full;
+    else {
+        return "ProxyVia must be one of: "
+            "off | on | full | block";
+    }
+
+    psf->viaopt_set = 1;
+    return NULL;
+}
+
+static const char*
+    set_bad_opt(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    if (strcasecmp(arg, "IsError") == 0)
+        psf->badopt = bad_error;
+    else if (strcasecmp(arg, "Ignore") == 0)
+        psf->badopt = bad_ignore;
+    else if (strcasecmp(arg, "StartBody") == 0)
+        psf->badopt = bad_body;
+    else {
+        return "ProxyBadHeader must be one of: "
+            "IsError | Ignore | StartBody";
+    }
+
+    psf->badopt_set = 1;
+    return NULL;
+}
+
+static const char*
+    set_status_opt(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    if (strcasecmp(arg, "Off") == 0)
+        psf->proxy_status = status_off;
+    else if (strcasecmp(arg, "On") == 0)
+        psf->proxy_status = status_on;
+    else if (strcasecmp(arg, "Full") == 0)
+        psf->proxy_status = status_full;
+    else {
+        return "ProxyStatus must be one of: "
+            "off | on | full";
+    }
+
+    psf->proxy_status_set = 1;
+    return NULL;
+}
+
+static const char *set_bgrowth(cmd_parms *parms, void *dummy, const char *arg)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    int growth = atoi(arg);
+    if (growth < 0 || growth > 1000) {
+        return "BalancerGrowth must be between 0 and 1000";
+    }
+    psf->bgrowth = growth;
+    psf->bgrowth_set = 1;
+
+    return NULL;
+}
+
+static const char *set_persist(cmd_parms *parms, void *dummy, int flag)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    psf->bal_persist = flag;
+    return NULL;
+}
+
+static const char *set_inherit(cmd_parms *parms, void *dummy, int flag)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    psf->inherit = flag;
+    psf->inherit_set = 1;
+    return NULL;
+}
+
+static const char *set_ppinherit(cmd_parms *parms, void *dummy, int flag)
+{
+    proxy_server_conf *psf =
+    ap_get_module_config(parms->server->module_config, &proxy_module);
+
+    psf->ppinherit = flag;
+    psf->ppinherit_set = 1;
+    return NULL;
+}
+
+static const char *add_member(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    server_rec *s = cmd->server;
+    proxy_server_conf *conf =
+    ap_get_module_config(s->module_config, &proxy_module);
+    proxy_balancer *balancer;
+    proxy_worker *worker;
+    char *path = cmd->path;
+    char *name = NULL;
+    char *word;
+    apr_table_t *params = apr_table_make(cmd->pool, 5);
+    const apr_array_header_t *arr;
+    const apr_table_entry_t *elts;
+    int reuse = 0;
+    int i;
+    /* XXX: Should this be NOT_IN_DIRECTORY|NOT_IN_FILES? */
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS);
+    if (err)
+        return err;
+
+    if (cmd->path)
+        path = apr_pstrdup(cmd->pool, cmd->path);
+
+    while (*arg) {
+        char *val;
+        word = ap_getword_conf(cmd->pool, &arg);
+        val = strchr(word, '=');
+
+        if (!val) {
+            if (!path)
+                path = word;
+            else if (!name)
+                name = word;
+            else {
+                if (cmd->path)
+                    return "BalancerMember can not have a balancer name when defined in a location";
+                else
+                    return "Invalid BalancerMember parameter. Parameter must "
+                           "be in the form 'key=value'";
+            }
+        } else {
+            *val++ = '\0';
+            apr_table_setn(params, word, val);
+        }
+    }
+    if (!path)
+        return "BalancerMember must define balancer name when outside <Proxy > section";
+    if (!name)
+        return "BalancerMember must define remote proxy server";
+
+    ap_str_tolower(path);   /* lowercase scheme://hostname */
+
+    /* Try to find the balancer */
+    balancer = ap_proxy_get_balancer(cmd->temp_pool, conf, path, 0);
+    if (!balancer) {
+        err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, path, "/", 0);
+        if (err)
+            return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
+    }
+
+    /* Try to find existing worker */
+    worker = ap_proxy_get_worker(cmd->temp_pool, balancer, conf, ap_proxy_de_socketfy(cmd->temp_pool, name));
+    if (!worker) {
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, APLOGNO(01147)
+                     "Defining worker '%s' for balancer '%s'",
+                     name, balancer->s->name);
+        if ((err = ap_proxy_define_worker(cmd->pool, &worker, balancer, conf, name, 0)) != NULL)
+            return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, APLOGNO(01148)
+                     "Defined worker '%s' for balancer '%s'",
+                     ap_proxy_worker_name(cmd->pool, worker), balancer->s->name);
+        PROXY_COPY_CONF_PARAMS(worker, conf);
+    } else {
+        reuse = 1;
+        ap_log_error(APLOG_MARK, APLOG_INFO, 0, cmd->server, APLOGNO(01149)
+                     "Sharing worker '%s' instead of creating new worker '%s'",
+                     ap_proxy_worker_name(cmd->pool, worker), name);
+    }
+    if (!worker->section_config) {
+        worker->section_config = balancer->section_config;
+    }
+
+    arr = apr_table_elts(params);
+    elts = (const apr_table_entry_t *)arr->elts;
+    for (i = 0; i < arr->nelts; i++) {
+        if (reuse) {
+            ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(01150)
+                         "Ignoring parameter '%s=%s' for worker '%s' because of worker sharing",
+                         elts[i].key, elts[i].val, ap_proxy_worker_name(cmd->pool, worker));
+        } else {
+            err = set_worker_param(cmd->pool, cmd->server, worker, elts[i].key,
+                                               elts[i].val);
+            if (err)
+                return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL);
+        }
+    }
+
+    return NULL;
+}
+
+static const char *
+    set_proxy_param(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    server_rec *s = cmd->server;
+    proxy_server_conf *conf =
+    (proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module);
+    char *name = NULL;
+    char *word, *val;
+    proxy_balancer *balancer = NULL;
+    proxy_worker *worker = NULL;
+    int in_proxy_section = 0;
+    /* XXX: Should this be NOT_IN_DIRECTORY|NOT_IN_FILES? */
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS);
+    if (err)
+        return err;
+
+    if (cmd->directive->parent &&
+        strncasecmp(cmd->directive->parent->directive,
+                    "<Proxy", 6) == 0) {
+        const char *pargs = cmd->directive->parent->args;
+        /* Directive inside <Proxy section
+         * Parent directive arg is the worker/balancer name.
+         */
+        name = ap_getword_conf(cmd->temp_pool, &pargs);
+        if ((word = ap_strchr(name, '>')))
+            *word = '\0';
+        in_proxy_section = 1;
+    }
+    else {
+        /* Standard set directive with worker/balancer
+         * name as first param.
+         */
+        name = ap_getword_conf(cmd->temp_pool, &arg);
+    }
+
+    if (ap_proxy_valid_balancer_name(name, 9)) {
+        balancer = ap_proxy_get_balancer(cmd->pool, conf, name, 0);
+        if (!balancer) {
+            if (in_proxy_section) {
+                err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, name, "/", 0);
+                if (err)
+                    return apr_pstrcat(cmd->temp_pool, "ProxySet ",
+                                       err, NULL);
+            }
+            else
+                return apr_pstrcat(cmd->temp_pool, "ProxySet can not find '",
+                                   name, "' Balancer.", NULL);
+        }
+    }
+    else {
+        worker = ap_proxy_get_worker(cmd->temp_pool, NULL, conf, ap_proxy_de_socketfy(cmd->temp_pool, name));
+        if (!worker) {
+            if (in_proxy_section) {
+                err = ap_proxy_define_worker(cmd->pool, &worker, NULL,
+                                             conf, name, 0);
+                if (err)
+                    return apr_pstrcat(cmd->temp_pool, "ProxySet ",
+                                       err, NULL);
+            }
+            else
+                return apr_pstrcat(cmd->temp_pool, "ProxySet can not find '",
+                                   name, "' Worker.", NULL);
+        }
+    }
+
+    while (*arg) {
+        word = ap_getword_conf(cmd->pool, &arg);
+        val = strchr(word, '=');
+        if (!val) {
+            return "Invalid ProxySet parameter. Parameter must be "
+                   "in the form 'key=value'";
+        }
+        else
+            *val++ = '\0';
+        if (worker)
+            err = set_worker_param(cmd->pool, cmd->server, worker, word, val);
+        else
+            err = set_balancer_param(conf, cmd->pool, balancer, word, val);
+
+        if (err)
+            return apr_pstrcat(cmd->temp_pool, "ProxySet: ", err, " ", word, "=", val, "; ", name, NULL);
+    }
+
+    return NULL;
+}
+
+static void ap_add_per_proxy_conf(server_rec *s, ap_conf_vector_t *dir_config)
+{
+    proxy_server_conf *sconf = ap_get_module_config(s->module_config,
+                                                    &proxy_module);
+    void **new_space = (void **)apr_array_push(sconf->sec_proxy);
+
+    *new_space = dir_config;
+}
+
+static const char *proxysection(cmd_parms *cmd, void *mconfig, const char *arg)
+{
+    const char *errmsg;
+    const char *endp = ap_strrchr_c(arg, '>');
+    int old_overrides = cmd->override;
+    char *old_path = cmd->path;
+    proxy_dir_conf *conf;
+    ap_conf_vector_t *new_dir_conf = ap_create_per_dir_config(cmd->pool);
+    ap_regex_t *r = NULL;
+    const command_rec *thiscmd = cmd->cmd;
+    char *word, *val;
+    proxy_balancer *balancer = NULL;
+    proxy_worker *worker = NULL;
+
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+    proxy_server_conf *sconf =
+    (proxy_server_conf *) ap_get_module_config(cmd->server->module_config, &proxy_module);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (endp == NULL) {
+        return apr_pstrcat(cmd->pool, cmd->cmd->name,
+                           "> directive missing closing '>'", NULL);
+    }
+
+    arg = apr_pstrndup(cmd->pool, arg, endp-arg);
+
+    if (!arg) {
+        if (thiscmd->cmd_data)
+            return "<ProxyMatch > block must specify a path";
+        else
+            return "<Proxy > block must specify a path";
+    }
+
+    cmd->path = ap_getword_conf(cmd->pool, &arg);
+    cmd->override = OR_ALL|ACCESS_CONF|PROXY_CONF;
+
+    if (!strncasecmp(cmd->path, "proxy:", 6))
+        cmd->path += 6;
+
+    /* XXX Ignore case?  What if we proxy a case-insensitive server?!?
+     * While we are at it, shouldn't we also canonicalize the entire
+     * scheme?  See proxy_fixup()
+     */
+    if (thiscmd->cmd_data) { /* <ProxyMatch> */
+        r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED);
+        if (!r) {
+            return "Regex could not be compiled";
+        }
+    }
+
+    /* initialize our config and fetch it */
+    conf = ap_set_config_vectors(cmd->server, new_dir_conf, cmd->path,
+                                 &proxy_module, cmd->pool);
+
+    errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_dir_conf);
+    if (errmsg != NULL)
+        return errmsg;
+
+    conf->r = r;
+    conf->p = cmd->path;
+    conf->p_is_fnmatch = apr_fnmatch_test(conf->p);
+
+    if (r) {
+        conf->refs = apr_array_make(cmd->pool, 8, sizeof(char *));
+        ap_regname(r, conf->refs, AP_REG_MATCH, 1);
+    }
+
+    ap_add_per_proxy_conf(cmd->server, new_dir_conf);
+
+    if (*arg != '\0') {
+        if (thiscmd->cmd_data)
+            return "Multiple <ProxyMatch> arguments not (yet) supported.";
+        if (conf->p_is_fnmatch)
+            return apr_pstrcat(cmd->pool, thiscmd->name,
+                               "> arguments are not supported for wildchar url.",
+                               NULL);
+        if (!ap_strchr_c(conf->p, ':'))
+            return apr_pstrcat(cmd->pool, thiscmd->name,
+                               "> arguments are not supported for non url.",
+                               NULL);
+        if (ap_proxy_valid_balancer_name((char *)conf->p, 9)) {
+            balancer = ap_proxy_get_balancer(cmd->pool, sconf, conf->p, 0);
+            if (!balancer) {
+                err = ap_proxy_define_balancer(cmd->pool, &balancer,
+                                               sconf, conf->p, "/", 0);
+                if (err)
+                    return apr_pstrcat(cmd->temp_pool, thiscmd->name,
+                                       " ", err, NULL);
+            }
+            if (!balancer->section_config) {
+                balancer->section_config = new_dir_conf;
+            }
+        }
+        else {
+            worker = ap_proxy_get_worker(cmd->temp_pool, NULL, sconf,
+                                         ap_proxy_de_socketfy(cmd->temp_pool, (char*)conf->p));
+            if (!worker) {
+                err = ap_proxy_define_worker(cmd->pool, &worker, NULL,
+                                          sconf, conf->p, 0);
+                if (err)
+                    return apr_pstrcat(cmd->temp_pool, thiscmd->name,
+                                       " ", err, NULL);
+            }
+            if (!worker->section_config) {
+                worker->section_config = new_dir_conf;
+            }
+        }
+        if (worker == NULL && balancer == NULL) {
+            return apr_pstrcat(cmd->pool, thiscmd->name,
+                               "> arguments are supported only for workers.",
+                               NULL);
+        }
+        while (*arg) {
+            word = ap_getword_conf(cmd->pool, &arg);
+            val = strchr(word, '=');
+            if (!val) {
+                return "Invalid Proxy parameter. Parameter must be "
+                       "in the form 'key=value'";
+            }
+            else
+                *val++ = '\0';
+            if (worker)
+                err = set_worker_param(cmd->pool, cmd->server, worker, word, val);
+            else
+                err = set_balancer_param(sconf, cmd->pool, balancer,
+                                         word, val);
+            if (err)
+                return apr_pstrcat(cmd->temp_pool, thiscmd->name, " ", err, " ",
+                                   word, "=", val, "; ", conf->p, NULL);
+        }
+    }
+
+    cmd->path = old_path;
+    cmd->override = old_overrides;
+
+    return NULL;
+}
+
+static const command_rec proxy_cmds[] =
+{
+    AP_INIT_RAW_ARGS("<Proxy", proxysection, NULL, RSRC_CONF,
+    "Container for directives affecting resources located in the proxied "
+    "location"),
+    AP_INIT_RAW_ARGS("<ProxyMatch", proxysection, (void*)1, RSRC_CONF,
+    "Container for directives affecting resources located in the proxied "
+    "location, in regular expression syntax"),
+    AP_INIT_FLAG("ProxyRequests", set_proxy_req, NULL, RSRC_CONF,
+     "on if the true proxy requests should be accepted"),
+    AP_INIT_TAKE2("ProxyRemote", add_proxy_noregex, NULL, RSRC_CONF,
+     "a scheme, partial URL or '*' and a proxy server"),
+    AP_INIT_TAKE2("ProxyRemoteMatch", add_proxy_regex, NULL, RSRC_CONF,
+     "a regex pattern and a proxy server"),
+    AP_INIT_FLAG("ProxyPassInterpolateEnv", ap_set_flag_slot_char,
+        (void*)APR_OFFSETOF(proxy_dir_conf, interpolate_env),
+        RSRC_CONF|ACCESS_CONF, "Interpolate Env Vars in reverse Proxy") ,
+    AP_INIT_RAW_ARGS("ProxyPass", add_pass_noregex, NULL, RSRC_CONF|ACCESS_CONF,
+     "a virtual path and a URL"),
+    AP_INIT_RAW_ARGS("ProxyPassMatch", add_pass_regex, NULL, RSRC_CONF|ACCESS_CONF,
+     "a virtual path and a URL"),
+    AP_INIT_TAKE123("ProxyPassReverse", add_pass_reverse, NULL, RSRC_CONF|ACCESS_CONF,
+     "a virtual path and a URL for reverse proxy behaviour"),
+    AP_INIT_TAKE23("ProxyPassReverseCookiePath", cookie_path, NULL,
+       RSRC_CONF|ACCESS_CONF, "Path rewrite rule for proxying cookies"),
+    AP_INIT_TAKE23("ProxyPassReverseCookieDomain", cookie_domain, NULL,
+       RSRC_CONF|ACCESS_CONF, "Domain rewrite rule for proxying cookies"),
+    AP_INIT_ITERATE("ProxyBlock", set_proxy_exclude, NULL, RSRC_CONF,
+     "A list of names, hosts or domains to which the proxy will not connect"),
+    AP_INIT_TAKE1("ProxyReceiveBufferSize", set_recv_buffer_size, NULL, RSRC_CONF,
+     "Receive buffer size for outgoing HTTP and FTP connections in bytes"),
+    AP_INIT_TAKE1("ProxyIOBufferSize", set_io_buffer_size, NULL, RSRC_CONF,
+     "IO buffer size for outgoing HTTP and FTP connections in bytes"),
+    AP_INIT_TAKE1("ProxyMaxForwards", set_max_forwards, NULL, RSRC_CONF,
+     "The maximum number of proxies a request may be forwarded through."),
+    AP_INIT_ITERATE("NoProxy", set_proxy_dirconn, NULL, RSRC_CONF,
+     "A list of domains, hosts, or subnets to which the proxy will connect directly"),
+    AP_INIT_TAKE1("ProxyDomain", set_proxy_domain, NULL, RSRC_CONF,
+     "The default intranet domain name (in absence of a domain in the URL)"),
+    AP_INIT_TAKE1("ProxyVia", set_via_opt, NULL, RSRC_CONF,
+     "Configure Via: proxy header header to one of: on | off | block | full"),
+    AP_INIT_FLAG("ProxyErrorOverride", set_proxy_error_override, NULL, RSRC_CONF|ACCESS_CONF,
+     "use our error handling pages instead of the servers' we are proxying"),
+    AP_INIT_FLAG("ProxyPreserveHost", set_preserve_host, NULL, RSRC_CONF|ACCESS_CONF,
+     "on if we should preserve host header while proxying"),
+    AP_INIT_TAKE1("ProxyTimeout", set_proxy_timeout, NULL, RSRC_CONF,
+     "Set the timeout (in seconds) for a proxied connection. "
+     "This overrides the server timeout"),
+    AP_INIT_TAKE1("ProxyBadHeader", set_bad_opt, NULL, RSRC_CONF,
+     "How to handle bad header line in response: IsError | Ignore | StartBody"),
+    AP_INIT_RAW_ARGS("BalancerMember", add_member, NULL, RSRC_CONF|ACCESS_CONF,
+     "A balancer name and scheme with list of params"),
+    AP_INIT_TAKE1("BalancerGrowth", set_bgrowth, NULL, RSRC_CONF,
+     "Number of additional Balancers that can be added post-config"),
+    AP_INIT_FLAG("BalancerPersist", set_persist, NULL, RSRC_CONF,
+     "on if the balancer should persist changes on reboot/restart made via the Balancer Manager"),
+    AP_INIT_FLAG("BalancerInherit", set_inherit, NULL, RSRC_CONF,
+     "on if this server should inherit Balancers and Workers defined in the main server "
+     "(Setting to off recommended if using the Balancer Manager)"),
+    AP_INIT_FLAG("ProxyPassInherit", set_ppinherit, NULL, RSRC_CONF,
+     "on if this server should inherit all ProxyPass directives defined in the main server "
+     "(Setting to off recommended if using the Balancer Manager)"),
+    AP_INIT_TAKE1("ProxyStatus", set_status_opt, NULL, RSRC_CONF,
+     "Configure Status: proxy status to one of: on | off | full"),
+    AP_INIT_RAW_ARGS("ProxySet", set_proxy_param, NULL, RSRC_CONF|ACCESS_CONF,
+     "A balancer or worker name with list of params"),
+    AP_INIT_TAKE1("ProxySourceAddress", set_source_address, NULL, RSRC_CONF,
+     "Configure local source IP used for request forward"),
+    AP_INIT_FLAG("ProxyAddHeaders", add_proxy_http_headers, NULL, RSRC_CONF|ACCESS_CONF,
+     "on if X-Forwarded-* headers should be added or completed"),
+    {NULL}
+};
+
+static APR_OPTIONAL_FN_TYPE(ssl_proxy_enable) *proxy_ssl_enable = NULL;
+static APR_OPTIONAL_FN_TYPE(ssl_engine_disable) *proxy_ssl_disable = NULL;
+static APR_OPTIONAL_FN_TYPE(ssl_engine_set) *proxy_ssl_engine = NULL;
+static APR_OPTIONAL_FN_TYPE(ssl_is_https) *proxy_is_https = NULL;
+static APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *proxy_ssl_val = NULL;
+
+PROXY_DECLARE(int) ap_proxy_ssl_enable(conn_rec *c)
+{
+    /*
+     * if c == NULL just check if the optional function was imported
+     * else run the optional function so ssl filters are inserted
+     */
+    if (proxy_ssl_enable) {
+        return c ? proxy_ssl_enable(c) : 1;
+    }
+
+    return 0;
+}
+
+PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c)
+{
+    if (proxy_ssl_disable) {
+        return proxy_ssl_disable(c);
+    }
+
+    return 0;
+}
+
+PROXY_DECLARE(int) ap_proxy_ssl_engine(conn_rec *c,
+                                       ap_conf_vector_t *per_dir_config,
+                                       int enable)
+{
+    /*
+     * if c == NULL just check if the optional function was imported
+     * else run the optional function so ssl filters are inserted
+     */
+    if (proxy_ssl_engine) {
+        return c ? proxy_ssl_engine(c, per_dir_config, 1, enable) : 1;
+    }
+
+    if (!per_dir_config) {
+        if (enable) {
+            return ap_proxy_ssl_enable(c);
+        }
+        else {
+            return ap_proxy_ssl_disable(c);
+        }
+    }
+
+    return 0;
+}
+
+PROXY_DECLARE(int) ap_proxy_conn_is_https(conn_rec *c)
+{
+    if (proxy_is_https) {
+        return proxy_is_https(c);
+    }
+    else
+        return 0;
+}
+
+PROXY_DECLARE(const char *) ap_proxy_ssl_val(apr_pool_t *p, server_rec *s,
+                                             conn_rec *c, request_rec *r,
+                                             const char *var)
+{
+    if (proxy_ssl_val) {
+        /* XXX Perhaps the casting useless */
+        return (const char *)proxy_ssl_val(p, s, c, r, (char *)var);
+    }
+    else
+        return NULL;
+}
+
+static int proxy_post_config(apr_pool_t *pconf, apr_pool_t *plog,
+                             apr_pool_t *ptemp, server_rec *main_s)
+{
+    server_rec *s = main_s;
+    apr_status_t rv = ap_global_mutex_create(&proxy_mutex, NULL,
+                                             proxy_id, NULL, s, pconf, 0);
+    if (rv != APR_SUCCESS) {
+        ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02478)
+        "failed to create %s mutex", proxy_id);
+        return rv;
+    }
+
+    proxy_ssl_enable = APR_RETRIEVE_OPTIONAL_FN(ssl_proxy_enable);
+    proxy_ssl_disable = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_disable);
+    proxy_ssl_engine = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_set);
+    proxy_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https);
+    proxy_ssl_val = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup);
+    ap_proxy_strmatch_path = apr_strmatch_precompile(pconf, "path=", 0);
+    ap_proxy_strmatch_domain = apr_strmatch_precompile(pconf, "domain=", 0);
+
+    for (; s; s = s->next) {
+        int rc, i;
+        proxy_server_conf *sconf =
+            ap_get_module_config(s->module_config, &proxy_module);
+        ap_conf_vector_t **sections =
+            (ap_conf_vector_t **)sconf->sec_proxy->elts;
+
+        for (i = 0; i < sconf->sec_proxy->nelts; ++i) {
+            rc = proxy_run_section_post_config(pconf, ptemp, plog,
+                                               s, sections[i]);
+            if (rc != OK && rc != DECLINED) {
+                return rc;
+            }
+        }
+    }
+
+    return OK;
+}
+
+/*
+ *  proxy Extension to mod_status
+ */
+static int proxy_status_hook(request_rec *r, int flags)
+{
+    int i, n;
+    void *sconf = r->server->module_config;
+    proxy_server_conf *conf = (proxy_server_conf *)
+        ap_get_module_config(sconf, &proxy_module);
+    proxy_balancer *balancer = NULL;
+    proxy_worker **worker = NULL;
+
+    if (conf->balancers->nelts == 0 ||
+        conf->proxy_status == status_off)
+        return OK;
+
+    balancer = (proxy_balancer *)conf->balancers->elts;
+    for (i = 0; i < conf->balancers->nelts; i++) {
+        if (!(flags & AP_STATUS_SHORT)) {
+            ap_rputs("<hr />\n<h1>Proxy LoadBalancer Status for ", r);
+            ap_rvputs(r, balancer->s->name, "</h1>\n\n", NULL);
+            ap_rputs("\n\n<table border=\"0\"><tr>"
+                     "<th>SSes</th><th>Timeout</th><th>Method</th>"
+                     "</tr>\n<tr>", r);
+            if (*balancer->s->sticky) {
+                if (strcmp(balancer->s->sticky, balancer->s->sticky_path)) {
+                    ap_rvputs(r, "<td>", balancer->s->sticky, " | ",
+                              balancer->s->sticky_path, NULL);
+                }
+                else {
+                    ap_rvputs(r, "<td>", balancer->s->sticky, NULL);
+                }
+            }
+            else {
+                ap_rputs("<td> - ", r);
+            }
+            ap_rprintf(r, "</td><td>%" APR_TIME_T_FMT "</td>",
+                       apr_time_sec(balancer->s->timeout));
+            ap_rprintf(r, "<td>%s</td>\n",
+                       balancer->lbmethod->name);
+            ap_rputs("</table>\n", r);
+            ap_rputs("\n\n<table border=\"0\"><tr>"
+                     "<th>Sch</th><th>Host</th><th>Stat</th>"
+                     "<th>Route</th><th>Redir</th>"
+                     "<th>F</th><th>Set</th><th>Acc</th><th>Busy</th><th>Wr</th><th>Rd</th>"
+                     "</tr>\n", r);
+        }
+        else {
+            ap_rprintf(r, "ProxyBalancer[%d]Name: %s\n", i, balancer->s->name);
+        }
+
+        worker = (proxy_worker **)balancer->workers->elts;
+        for (n = 0; n < balancer->workers->nelts; n++) {
+            char fbuf[50];
+            if (!(flags & AP_STATUS_SHORT)) {
+                ap_rvputs(r, "<tr>\n<td>", (*worker)->s->scheme, "</td>", NULL);
+                ap_rvputs(r, "<td>", (*worker)->s->hostname_ex, "</td><td>", NULL);
+                ap_rvputs(r, ap_proxy_parse_wstatus(r->pool, *worker), NULL);
+                ap_rvputs(r, "</td><td>", (*worker)->s->route, NULL);
+                ap_rvputs(r, "</td><td>", (*worker)->s->redirect, NULL);
+                ap_rprintf(r, "</td><td>%.2f</td>", (float)((*worker)->s->lbfactor)/100.0);
+                ap_rprintf(r, "<td>%d</td>", (*worker)->s->lbset);
+                ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td>",
+                           (*worker)->s->elected);
+                ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td><td>",
+                           (*worker)->s->busy);
+                ap_rputs(apr_strfsize((*worker)->s->transferred, fbuf), r);
+                ap_rputs("</td><td>", r);
+                ap_rputs(apr_strfsize((*worker)->s->read, fbuf), r);
+                ap_rputs("</td>\n", r);
+
+                /* TODO: Add the rest of dynamic worker data */
+                ap_rputs("</tr>\n", r);
+            }
+            else {
+                ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Name: %s\n",
+                           i, n, (*worker)->s->name);
+                ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Status: %s\n",
+                           i, n, ap_proxy_parse_wstatus(r->pool, *worker));
+                ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Elected: %"
+                              APR_SIZE_T_FMT "\n",
+                           i, n, (*worker)->s->elected);
+                ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Busy: %"
+                              APR_SIZE_T_FMT "\n",
+                           i, n, (*worker)->s->busy);
+                ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Sent: %"
+                              APR_OFF_T_FMT "K\n",
+                           i, n, (*worker)->s->transferred >> 10);
+                ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Rcvd: %"
+                              APR_OFF_T_FMT "K\n",
+                           i, n, (*worker)->s->read >> 10);
+
+                /* TODO: Add the rest of dynamic worker data */
+            }
+
+            ++worker;
+        }
+        if (!(flags & AP_STATUS_SHORT)) {
+            ap_rputs("</table>\n", r);
+        }
+        ++balancer;
+    }
+    if (!(flags & AP_STATUS_SHORT)) {
+        ap_rputs("<hr /><table>\n"
+                 "<tr><th>SSes</th><td>Sticky session name</td></tr>\n"
+                 "<tr><th>Timeout</th><td>Balancer Timeout</td></tr>\n"
+                 "<tr><th>Sch</th><td>Connection scheme</td></tr>\n"
+                 "<tr><th>Host</th><td>Backend Hostname</td></tr>\n"
+                 "<tr><th>Stat</th><td>Worker status</td></tr>\n"
+                 "<tr><th>Route</th><td>Session Route</td></tr>\n"
+                 "<tr><th>Redir</th><td>Session Route Redirection</td></tr>\n"
+                 "<tr><th>F</th><td>Load Balancer Factor</td></tr>\n"
+                 "<tr><th>Acc</th><td>Number of uses</td></tr>\n"
+                 "<tr><th>Wr</th><td>Number of bytes transferred</td></tr>\n"
+                 "<tr><th>Rd</th><td>Number of bytes read</td></tr>\n"
+                 "</table>", r);
+    }
+
+    return OK;
+}
+
+static void child_init(apr_pool_t *p, server_rec *s)
+{
+    proxy_worker *reverse = NULL;
+
+    apr_status_t rv = apr_global_mutex_child_init(&proxy_mutex,
+                                      apr_global_mutex_lockfile(proxy_mutex),
+                                      p);
+    if (rv != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(02479)
+                     "could not init proxy_mutex in child");
+        exit(1); /* Ugly, but what else? */
+    }
+
+    /* TODO */
+    while (s) {
+        void *sconf = s->module_config;
+        proxy_server_conf *conf;
+        proxy_worker *worker;
+        int i;
+
+        conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module);
+        /*
+         * NOTE: non-balancer members don't use shm at all...
+         *       after all, why should they?
+         */
+        worker = (proxy_worker *)conf->workers->elts;
+        for (i = 0; i < conf->workers->nelts; i++, worker++) {
+            ap_proxy_initialize_worker(worker, s, conf->pool);
+        }
+        /* Create and initialize forward worker if defined */
+        if (conf->req_set && conf->req) {
+            proxy_worker *forward;
+            ap_proxy_define_worker(p, &forward, NULL, NULL, "http://www.apache.org", 0);
+            conf->forward = forward;
+            PROXY_STRNCPY(conf->forward->s->name,     "proxy:forward");
+            PROXY_STRNCPY(conf->forward->s->hostname, "*"); /* for compatibility */
+            PROXY_STRNCPY(conf->forward->s->hostname_ex, "*");
+            PROXY_STRNCPY(conf->forward->s->scheme,   "*");
+            conf->forward->hash.def = conf->forward->s->hash.def =
+                ap_proxy_hashfunc(conf->forward->s->name, PROXY_HASHFUNC_DEFAULT);
+             conf->forward->hash.fnv = conf->forward->s->hash.fnv =
+                ap_proxy_hashfunc(conf->forward->s->name, PROXY_HASHFUNC_FNV);
+            /* Do not disable worker in case of errors */
+            conf->forward->s->status |= PROXY_WORKER_IGNORE_ERRORS;
+            /* Mark as the "generic" worker */
+            conf->forward->s->status |= PROXY_WORKER_GENERIC;
+            ap_proxy_initialize_worker(conf->forward, s, conf->pool);
+            /* Disable address cache for generic forward worker */
+            conf->forward->s->is_address_reusable = 0;
+        }
+        if (!reverse) {
+            ap_proxy_define_worker(p, &reverse, NULL, NULL, "http://www.apache.org", 0);
+            PROXY_STRNCPY(reverse->s->name,     "proxy:reverse");
+            PROXY_STRNCPY(reverse->s->hostname, "*"); /* for compatibility */
+            PROXY_STRNCPY(reverse->s->hostname_ex, "*");
+            PROXY_STRNCPY(reverse->s->scheme,   "*");
+            reverse->hash.def = reverse->s->hash.def =
+                ap_proxy_hashfunc(reverse->s->name, PROXY_HASHFUNC_DEFAULT);
+            reverse->hash.fnv = reverse->s->hash.fnv =
+                ap_proxy_hashfunc(reverse->s->name, PROXY_HASHFUNC_FNV);
+            /* Do not disable worker in case of errors */
+            reverse->s->status |= PROXY_WORKER_IGNORE_ERRORS;
+            /* Mark as the "generic" worker */
+            reverse->s->status |= PROXY_WORKER_GENERIC;
+            conf->reverse = reverse;
+            ap_proxy_initialize_worker(conf->reverse, s, conf->pool);
+            /* Disable address cache for generic reverse worker */
+            reverse->s->is_address_reusable = 0;
+        }
+        conf->reverse = reverse;
+        s = s->next;
+    }
+}
+
+/*
+ * This routine is called before the server processes the configuration
+ * files.
+ */
+static int proxy_pre_config(apr_pool_t *pconf, apr_pool_t *plog,
+                            apr_pool_t *ptemp)
+{
+    apr_status_t rv = ap_mutex_register(pconf, proxy_id, NULL,
+            APR_LOCK_DEFAULT, 0);
+    if (rv != APR_SUCCESS) {
+        ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02480)
+                "failed to register %s mutex", proxy_id);
+        return 500; /* An HTTP status would be a misnomer! */
+    }
+
+    APR_OPTIONAL_HOOK(ap, status_hook, proxy_status_hook, NULL, NULL,
+                      APR_HOOK_MIDDLE);
+    /* Reset workers count on gracefull restart */
+    proxy_lb_workers = 0;
+    set_worker_hc_param_f = APR_RETRIEVE_OPTIONAL_FN(set_worker_hc_param);
+    return OK;
+}
+static void register_hooks(apr_pool_t *p)
+{
+    /* fixup before mod_rewrite, so that the proxied url will not
+     * escaped accidentally by our fixup.
+     */
+    static const char * const aszSucc[] = { "mod_rewrite.c", NULL};
+    /* Only the mpm_winnt has child init hook handler.
+     * make sure that we are called after the mpm
+     * initializes.
+     */
+    static const char *const aszPred[] = { "mpm_winnt.c", "mod_proxy_balancer.c",
+                                           "mod_proxy_hcheck.c", NULL};
+    /* handler */
+    ap_hook_handler(proxy_handler, NULL, NULL, APR_HOOK_FIRST);
+    /* filename-to-URI translation */
+    ap_hook_translate_name(proxy_trans, aszSucc, NULL, APR_HOOK_FIRST);
+    /* walk <Proxy > entries and suppress default TRACE behavior */
+    ap_hook_map_to_storage(proxy_map_location, NULL,NULL, APR_HOOK_FIRST);
+    /* fixups */
+    ap_hook_fixups(proxy_fixup, NULL, aszSucc, APR_HOOK_FIRST);
+    /* post read_request handling */
+    ap_hook_post_read_request(proxy_detect, NULL, NULL, APR_HOOK_FIRST);
+    /* pre config handling */
+    ap_hook_pre_config(proxy_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
+    /* post config handling */
+    ap_hook_post_config(proxy_post_config, NULL, NULL, APR_HOOK_MIDDLE);
+    /* child init handling */
+    ap_hook_child_init(child_init, aszPred, NULL, APR_HOOK_MIDDLE);
+
+    /* register optional functions within proxy_util.c */
+    proxy_util_register_hooks(p);
+}
+
+AP_DECLARE_MODULE(proxy) =
+{
+    STANDARD20_MODULE_STUFF,
+    create_proxy_dir_config,    /* create per-directory config structure */
+    merge_proxy_dir_config,     /* merge per-directory config structures */
+    create_proxy_config,        /* create per-server config structure */
+    merge_proxy_config,         /* merge per-server config structures */
+    proxy_cmds,                 /* command table */
+    register_hooks
+};
+
+APR_HOOK_STRUCT(
+    APR_HOOK_LINK(scheme_handler)
+    APR_HOOK_LINK(canon_handler)
+    APR_HOOK_LINK(pre_request)
+    APR_HOOK_LINK(post_request)
+    APR_HOOK_LINK(request_status)
+)
+
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, scheme_handler,
+                                     (request_rec *r, proxy_worker *worker,
+                                      proxy_server_conf *conf,
+                                      char *url, const char *proxyhost,
+                                      apr_port_t proxyport),(r,worker,conf,
+                                      url,proxyhost,proxyport),DECLINED)
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, canon_handler,
+                                      (request_rec *r, char *url),(r,
+                                      url),DECLINED)
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, pre_request, (
+                                      proxy_worker **worker,
+                                      proxy_balancer **balancer,
+                                      request_rec *r,
+                                      proxy_server_conf *conf,
+                                      char **url),(worker,balancer,
+                                      r,conf,url),DECLINED)
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, post_request,
+                                      (proxy_worker *worker,
+                                       proxy_balancer *balancer,
+                                       request_rec *r,
+                                       proxy_server_conf *conf),(worker,
+                                       balancer,r,conf),DECLINED)
+APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, section_post_config,
+                                    (apr_pool_t *p, apr_pool_t *plog,
+                                     apr_pool_t *ptemp, server_rec *s,
+                                     ap_conf_vector_t *section_config),
+                                    (p, ptemp, plog, s, section_config),
+                                    OK, DECLINED)
+APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, fixups,
+                                    (request_rec *r), (r),
+                                    OK, DECLINED)
+APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, request_status,
+                                    (int *status, request_rec *r),
+                                    (status, r),
+                                    OK, DECLINED)