Adding upstream version 2.4.38.upstream/2.4.38upstream

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

1 files changed, 726 insertions, 0 deletions

diff --git a/modules/mappers/mod_alias.c b/modules/mappers/mod_alias.c
new file mode 100644
index 0000000..79d58d8
--- /dev/null
+++ b/modules/mappers/mod_alias.c
@@ -0,0 +1,726 @@
+/* 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.
+ */
+
+/*
+ * http_alias.c: Stuff for dealing with directory aliases
+ *
+ * Original by Rob McCool, rewritten in succession by David Robinson
+ * and rst.
+ *
+ */
+
+#include "apr_strings.h"
+#include "apr_lib.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_core.h"
+#include "http_config.h"
+#include "http_request.h"
+#include "http_log.h"
+#include "ap_expr.h"
+
+
+typedef struct {
+    const char *real;
+    const char *fake;
+    char *handler;
+    ap_regex_t *regexp;
+    int redir_status;                /* 301, 302, 303, 410, etc */
+} alias_entry;
+
+typedef struct {
+    apr_array_header_t *aliases;
+    apr_array_header_t *redirects;
+} alias_server_conf;
+
+typedef struct {
+    unsigned int alias_set:1;
+    unsigned int redirect_set:1;
+    apr_array_header_t *redirects;
+    const ap_expr_info_t *alias;
+    char *handler;
+    const ap_expr_info_t *redirect;
+    int redirect_status;                /* 301, 302, 303, 410, etc */
+} alias_dir_conf;
+
+module AP_MODULE_DECLARE_DATA alias_module;
+
+static char magic_error_value;
+#define PREGSUB_ERROR      (&magic_error_value)
+
+static void *create_alias_config(apr_pool_t *p, server_rec *s)
+{
+    alias_server_conf *a =
+    (alias_server_conf *) apr_pcalloc(p, sizeof(alias_server_conf));
+
+    a->aliases = apr_array_make(p, 20, sizeof(alias_entry));
+    a->redirects = apr_array_make(p, 20, sizeof(alias_entry));
+    return a;
+}
+
+static void *create_alias_dir_config(apr_pool_t *p, char *d)
+{
+    alias_dir_conf *a =
+    (alias_dir_conf *) apr_pcalloc(p, sizeof(alias_dir_conf));
+    a->redirects = apr_array_make(p, 2, sizeof(alias_entry));
+    return a;
+}
+
+static void *merge_alias_config(apr_pool_t *p, void *basev, void *overridesv)
+{
+    alias_server_conf *a =
+    (alias_server_conf *) apr_pcalloc(p, sizeof(alias_server_conf));
+    alias_server_conf *base = (alias_server_conf *) basev;
+    alias_server_conf *overrides = (alias_server_conf *) overridesv;
+
+    a->aliases = apr_array_append(p, overrides->aliases, base->aliases);
+    a->redirects = apr_array_append(p, overrides->redirects, base->redirects);
+    return a;
+}
+
+static void *merge_alias_dir_config(apr_pool_t *p, void *basev, void *overridesv)
+{
+    alias_dir_conf *a =
+    (alias_dir_conf *) apr_pcalloc(p, sizeof(alias_dir_conf));
+    alias_dir_conf *base = (alias_dir_conf *) basev;
+    alias_dir_conf *overrides = (alias_dir_conf *) overridesv;
+
+    a->redirects = apr_array_append(p, overrides->redirects, base->redirects);
+
+    a->alias = (overrides->alias_set == 0) ? base->alias : overrides->alias;
+    a->handler = (overrides->alias_set == 0) ? base->handler : overrides->handler;
+    a->alias_set = overrides->alias_set || base->alias_set;
+
+    a->redirect = (overrides->redirect_set == 0) ? base->redirect : overrides->redirect;
+    a->redirect_status = (overrides->redirect_set == 0) ? base->redirect_status : overrides->redirect_status;
+    a->redirect_set = overrides->redirect_set || base->redirect_set;
+
+    return a;
+}
+
+/* need prototype for overlap check */
+static int alias_matches(const char *uri, const char *alias_fakename);
+
+static const char *add_alias_internal(cmd_parms *cmd, void *dummy,
+                                      const char *fake, const char *real,
+                                      int use_regex)
+{
+    server_rec *s = cmd->server;
+    alias_server_conf *conf = ap_get_module_config(s->module_config,
+                                                   &alias_module);
+    alias_entry *new = apr_array_push(conf->aliases);
+    alias_entry *entries = (alias_entry *)conf->aliases->elts;
+    int i;
+
+    /* XXX: real can NOT be relative to DocumentRoot here... compat bug. */
+
+    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    if (use_regex) {
+        new->regexp = ap_pregcomp(cmd->pool, fake, AP_REG_EXTENDED);
+        if (new->regexp == NULL)
+            return "Regular expression could not be compiled.";
+        new->real = real;
+    }
+    else {
+        /* XXX This may be optimized, but we must know that new->real
+         * exists.  If so, we can dir merge later, trusing new->real
+         * and just canonicalizing the remainder.  Not till I finish
+         * cleaning out the old ap_canonical stuff first.
+         */
+        new->real = real;
+    }
+    new->fake = fake;
+    new->handler = cmd->info;
+
+    /* check for overlapping (Script)Alias directives
+     * and throw a warning if found one
+     */
+    if (!use_regex) {
+        for (i = 0; i < conf->aliases->nelts - 1; ++i) {
+            alias_entry *alias = &entries[i];
+
+            if (  (!alias->regexp &&  alias_matches(fake, alias->fake) > 0)
+                || (alias->regexp && !ap_regexec(alias->regexp, fake, 0, NULL, 0))) {
+                ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(00671)
+                             "The %s directive in %s at line %d will probably "
+                             "never match because it overlaps an earlier "
+                             "%sAlias%s.",
+                             cmd->cmd->name, cmd->directive->filename,
+                             cmd->directive->line_num,
+                             alias->handler ? "Script" : "",
+                             alias->regexp ? "Match" : "");
+
+                break; /* one warning per alias should be sufficient */
+            }
+        }
+    }
+
+    return NULL;
+}
+
+static const char *add_alias(cmd_parms *cmd, void *dummy, const char *fake,
+        const char *real)
+{
+    if (real) {
+
+        return add_alias_internal(cmd, dummy, fake, real, 0);
+
+    }
+    else {
+        alias_dir_conf *dirconf = (alias_dir_conf *) dummy;
+
+        const char *err = ap_check_cmd_context(cmd, NOT_IN_DIRECTORY|NOT_IN_FILES);
+
+        if (err != NULL) {
+            return err;
+        }
+
+        if (!cmd->path) {
+            return "Alias must have two arguments when used globally";
+        }
+
+        dirconf->alias =
+                ap_expr_parse_cmd(cmd, fake, AP_EXPR_FLAG_STRING_RESULT,
+                        &err, NULL);
+        if (err) {
+            return apr_pstrcat(cmd->temp_pool,
+                    "Cannot parse alias expression '", fake, "': ", err,
+                    NULL);
+        }
+
+        dirconf->handler = cmd->info;
+        dirconf->alias_set = 1;
+
+        return NULL;
+
+    }
+}
+
+static const char *add_alias_regex(cmd_parms *cmd, void *dummy,
+                                   const char *fake, const char *real)
+{
+    return add_alias_internal(cmd, dummy, fake, real, 1);
+}
+
+static const char *add_redirect_internal(cmd_parms *cmd,
+                                         alias_dir_conf *dirconf,
+                                         const char *arg1, const char *arg2,
+                                         const char *arg3, int use_regex)
+{
+    alias_entry *new;
+    server_rec *s = cmd->server;
+    alias_server_conf *serverconf = ap_get_module_config(s->module_config,
+                                                         &alias_module);
+    int status = (int) (long) cmd->info;
+    int grokarg1 = 1;
+    ap_regex_t *regex = NULL;
+    const char *fake = arg2;
+    const char *url = arg3;
+
+    /*
+     * Logic flow:
+     *   Go ahead and try to grok the 1st arg, in case it is a
+     *   Redirect status. Now if we have 3 args, we expect that
+     *   we were able to understand that 1st argument (it's something
+     *   we expected, so if not, then we bail
+     */
+    if (!strcasecmp(arg1, "permanent"))
+        status = HTTP_MOVED_PERMANENTLY;
+    else if (!strcasecmp(arg1, "temp"))
+        status = HTTP_MOVED_TEMPORARILY;
+    else if (!strcasecmp(arg1, "seeother"))
+        status = HTTP_SEE_OTHER;
+    else if (!strcasecmp(arg1, "gone")) {
+        status = HTTP_GONE;
+        grokarg1 = -1;
+    }
+    else if (apr_isdigit(*arg1)) {
+        status = atoi(arg1);
+        if (!ap_is_HTTP_REDIRECT(status)) {
+            grokarg1 = -1;
+        }
+    }
+    else {
+        grokarg1 = 0;
+    }
+
+    if (arg3 && !grokarg1)
+        return "Redirect: invalid first argument (of three)";
+
+    /*
+     * if we have the 2nd arg and we understand the 1st one as a redirect
+     * status (3xx, but not things like 404 /robots.txt), or if we have the
+     * 1st arg but don't understand it, we use the expression syntax assuming
+     * a path from the location.
+     *
+     * if we understand the first arg but have no second arg, we are dealing
+     * with a status like "GONE" or a non-redirect status (e.g. 404, 503).
+     */
+    if (!cmd->path) {
+        /* <Location> context only for now */
+        ;
+    }
+    else if ((grokarg1 > 0 && arg2 && !arg3) || (!grokarg1 && !arg2)) {
+        const char *expr_err = NULL;
+
+        url = grokarg1 ? arg2 : arg1;
+        dirconf->redirect =
+                ap_expr_parse_cmd(cmd, url, AP_EXPR_FLAG_STRING_RESULT,
+                        &expr_err, NULL);
+        if (expr_err) {
+            return apr_pstrcat(cmd->temp_pool,
+                    "Cannot parse redirect expression '", url, "': ", expr_err,
+                    NULL);
+        }
+
+        dirconf->redirect_status = status;
+        dirconf->redirect_set = 1;
+
+        return NULL;
+
+    }
+    else if (grokarg1 < 0 && !arg2) {
+
+        dirconf->redirect_status = status;
+        dirconf->redirect_set = 1;
+
+        return NULL;
+
+    }
+
+    /*
+     * if we don't have the 3rd arg and we didn't understand the 1st
+     * one, then assume URL-path URL. This also handles case, eg, GONE
+     * we even though we don't have a 3rd arg, we did understand the 1st
+     * one, so we don't want to re-arrange
+     */
+    if (!arg3 && !grokarg1) {
+        fake = arg1;
+        url = arg2;
+    }
+
+    if (use_regex) {
+        regex = ap_pregcomp(cmd->pool, fake, AP_REG_EXTENDED);
+        if (regex == NULL)
+            return "Regular expression could not be compiled.";
+    }
+
+    if (ap_is_HTTP_REDIRECT(status)) {
+        if (!url)
+            return "URL to redirect to is missing";
+        /* PR#35314: we can allow path components here;
+         * they get correctly resolved to full URLs.
+         */
+        if (!use_regex && !ap_is_url(url) && (url[0] != '/'))
+            return "Redirect to non-URL";
+    }
+    else {
+        if (url)
+            return "Redirect URL not valid for this status";
+    }
+
+    if (cmd->path)
+        new = apr_array_push(dirconf->redirects);
+    else
+        new = apr_array_push(serverconf->redirects);
+
+    new->fake = fake;
+    new->real = url;
+    new->regexp = regex;
+    new->redir_status = status;
+    return NULL;
+}
+
+static const char *add_redirect(cmd_parms *cmd, void *dirconf,
+                                const char *arg1, const char *arg2,
+                                const char *arg3)
+{
+    return add_redirect_internal(cmd, dirconf, arg1, arg2, arg3, 0);
+}
+
+static const char *add_redirect2(cmd_parms *cmd, void *dirconf,
+                                 const char *arg1, const char *arg2)
+{
+    return add_redirect_internal(cmd, dirconf, arg1, arg2, NULL, 0);
+}
+
+static const char *add_redirect_regex(cmd_parms *cmd, void *dirconf,
+                                      const char *arg1, const char *arg2,
+                                      const char *arg3)
+{
+    return add_redirect_internal(cmd, dirconf, arg1, arg2, arg3, 1);
+}
+
+static const command_rec alias_cmds[] =
+{
+    AP_INIT_TAKE12("Alias", add_alias, NULL, RSRC_CONF | ACCESS_CONF,
+                  "a fakename and a realname, or a realname in a Location"),
+    AP_INIT_TAKE12("ScriptAlias", add_alias, "cgi-script", RSRC_CONF | ACCESS_CONF,
+                  "a fakename and a realname, or a realname in a Location"),
+    AP_INIT_TAKE123("Redirect", add_redirect, (void *) HTTP_MOVED_TEMPORARILY,
+                   OR_FILEINFO,
+                   "an optional status, then document to be redirected and "
+                   "destination URL"),
+    AP_INIT_TAKE2("AliasMatch", add_alias_regex, NULL, RSRC_CONF,
+                  "a regular expression and a filename"),
+    AP_INIT_TAKE2("ScriptAliasMatch", add_alias_regex, "cgi-script", RSRC_CONF,
+                  "a regular expression and a filename"),
+    AP_INIT_TAKE23("RedirectMatch", add_redirect_regex,
+                   (void *) HTTP_MOVED_TEMPORARILY, OR_FILEINFO,
+                   "an optional status, then a regular expression and "
+                   "destination URL"),
+    AP_INIT_TAKE2("RedirectTemp", add_redirect2,
+                  (void *) HTTP_MOVED_TEMPORARILY, OR_FILEINFO,
+                  "a document to be redirected, then the destination URL"),
+    AP_INIT_TAKE2("RedirectPermanent", add_redirect2,
+                  (void *) HTTP_MOVED_PERMANENTLY, OR_FILEINFO,
+                  "a document to be redirected, then the destination URL"),
+    {NULL}
+};
+
+static int alias_matches(const char *uri, const char *alias_fakename)
+{
+    const char *aliasp = alias_fakename, *urip = uri;
+
+    while (*aliasp) {
+        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;
+
+            do {
+                ++aliasp;
+            } while (*aliasp == '/');
+            do {
+                ++urip;
+            } while (*urip == '/');
+        }
+        else {
+            /* Other characters are compared literally */
+            if (*urip++ != *aliasp++)
+                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;
+}
+
+static char *try_alias(request_rec *r)
+{
+    alias_dir_conf *dirconf =
+            (alias_dir_conf *) ap_get_module_config(r->per_dir_config, &alias_module);
+
+    if (dirconf->alias) {
+        const char *err = NULL;
+
+        char *found = apr_pstrdup(r->pool,
+                ap_expr_str_exec(r, dirconf->alias, &err));
+        if (err) {
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02825)
+                          "Can't evaluate alias expression: %s", err);
+            return PREGSUB_ERROR;
+        }
+
+        if (dirconf->handler) { /* Set handler, and leave a note for mod_cgi */
+            r->handler = dirconf->handler;
+            apr_table_setn(r->notes, "alias-forced-type", r->handler);
+        }
+        /* XXX This is as SLOW as can be, next step, we optimize
+         * and merge to whatever part of the found path was already
+         * canonicalized.  After I finish eliminating os canonical.
+         * Better fail test for ap_server_root_relative needed here.
+         */
+        found = ap_server_root_relative(r->pool, found);
+        return found;
+
+    }
+
+    return NULL;
+}
+
+static char *try_redirect(request_rec *r, int *status)
+{
+    alias_dir_conf *dirconf =
+            (alias_dir_conf *) ap_get_module_config(r->per_dir_config, &alias_module);
+
+    if (dirconf->redirect_set) {
+        apr_uri_t uri;
+        const char *err = NULL;
+        char *found = "";
+
+        if (dirconf->redirect) {
+
+            found = apr_pstrdup(r->pool,
+                    ap_expr_str_exec(r, dirconf->redirect, &err));
+            if (err) {
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02826)
+                              "Can't evaluate redirect expression: %s", err);
+                return PREGSUB_ERROR;
+            }
+
+            apr_uri_parse(r->pool, found, &uri);
+            /* Do not escape the query string or fragment. */
+            found = apr_uri_unparse(r->pool, &uri, APR_URI_UNP_OMITQUERY);
+            found = ap_escape_uri(r->pool, found);
+            if (uri.query) {
+                found = apr_pstrcat(r->pool, found, "?", uri.query, NULL);
+            }
+            if (uri.fragment) {
+                found = apr_pstrcat(r->pool, found, "#", uri.fragment, NULL);
+            }
+
+        }
+
+        *status = dirconf->redirect_status;
+        return found;
+
+    }
+
+    return NULL;
+}
+
+static char *try_alias_list(request_rec *r, apr_array_header_t *aliases,
+                            int is_redir, int *status)
+{
+    alias_entry *entries = (alias_entry *) aliases->elts;
+    ap_regmatch_t regm[AP_MAX_REG_MATCH];
+    char *found = NULL;
+    int i;
+
+    for (i = 0; i < aliases->nelts; ++i) {
+        alias_entry *alias = &entries[i];
+        int l;
+
+        if (alias->regexp) {
+            if (!ap_regexec(alias->regexp, r->uri, AP_MAX_REG_MATCH, regm, 0)) {
+                if (alias->real) {
+                    found = ap_pregsub(r->pool, alias->real, r->uri,
+                                       AP_MAX_REG_MATCH, regm);
+                    if (found) {
+                       if (is_redir) {
+                            apr_uri_t uri;
+                            apr_uri_parse(r->pool, found, &uri);
+                            /* Do not escape the query string or fragment. */
+                            found = apr_uri_unparse(r->pool, &uri,
+                                                    APR_URI_UNP_OMITQUERY);
+                            found = ap_escape_uri(r->pool, found);
+                            if (uri.query) {
+                                found = apr_pstrcat(r->pool, found, "?",
+                                                    uri.query, NULL);
+                            }
+                            if (uri.fragment) {
+                                found = apr_pstrcat(r->pool, found, "#",
+                                                    uri.fragment, NULL);
+                            }
+                       }
+                    }
+                    else {
+                        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00672)
+                                      "Regex substitution in '%s' failed. "
+                                      "Replacement too long?", alias->real);
+                        return PREGSUB_ERROR;
+                    }
+                }
+                else {
+                    /* need something non-null */
+                    found = "";
+                }
+            }
+        }
+        else {
+            l = alias_matches(r->uri, alias->fake);
+
+            if (l > 0) {
+                ap_set_context_info(r, alias->fake, alias->real);
+                if (is_redir) {
+                    char *escurl;
+                    escurl = ap_os_escape_path(r->pool, r->uri + l, 1);
+
+                    found = apr_pstrcat(r->pool, alias->real, escurl, NULL);
+                }
+                else
+                    found = apr_pstrcat(r->pool, alias->real, r->uri + l, NULL);
+            }
+        }
+
+        if (found) {
+            if (alias->handler) {    /* Set handler, and leave a note for mod_cgi */
+                r->handler = alias->handler;
+                apr_table_setn(r->notes, "alias-forced-type", r->handler);
+            }
+            /* XXX This is as SLOW as can be, next step, we optimize
+             * and merge to whatever part of the found path was already
+             * canonicalized.  After I finish eliminating os canonical.
+             * Better fail test for ap_server_root_relative needed here.
+             */
+            if (!is_redir) {
+                found = ap_server_root_relative(r->pool, found);
+            }
+            if (found) {
+                *status = alias->redir_status;
+            }
+            return found;
+        }
+
+    }
+
+    return NULL;
+}
+
+static int translate_alias_redir(request_rec *r)
+{
+    ap_conf_vector_t *sconf = r->server->module_config;
+    alias_server_conf *serverconf = ap_get_module_config(sconf, &alias_module);
+    char *ret;
+    int status;
+
+    if (r->uri[0] != '/' && r->uri[0] != '\0') {
+        return DECLINED;
+    }
+
+    if ((ret = try_redirect(r, &status)) != NULL
+            || (ret = try_alias_list(r, serverconf->redirects, 1, &status))
+                    != NULL) {
+        if (ret == PREGSUB_ERROR)
+            return HTTP_INTERNAL_SERVER_ERROR;
+        if (ap_is_HTTP_REDIRECT(status)) {
+            if (ret[0] == '/') {
+                char *orig_target = ret;
+
+                ret = ap_construct_url(r->pool, ret, r);
+                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00673)
+                              "incomplete redirection target of '%s' for "
+                              "URI '%s' modified to '%s'",
+                              orig_target, r->uri, ret);
+            }
+            if (!ap_is_url(ret)) {
+                status = HTTP_INTERNAL_SERVER_ERROR;
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00674)
+                              "cannot redirect '%s' to '%s'; "
+                              "target is not a valid absoluteURI or abs_path",
+                              r->uri, ret);
+            }
+            else {
+                /* append requested query only, if the config didn't
+                 * supply its own.
+                 */
+                if (r->args && !ap_strchr(ret, '?')) {
+                    ret = apr_pstrcat(r->pool, ret, "?", r->args, NULL);
+                }
+                apr_table_setn(r->headers_out, "Location", ret);
+            }
+        }
+        return status;
+    }
+
+    if ((ret = try_alias(r)) != NULL
+            || (ret = try_alias_list(r, serverconf->aliases, 0, &status))
+                    != NULL) {
+        r->filename = ret;
+        return OK;
+    }
+
+    return DECLINED;
+}
+
+static int fixup_redir(request_rec *r)
+{
+    void *dconf = r->per_dir_config;
+    alias_dir_conf *dirconf =
+    (alias_dir_conf *) ap_get_module_config(dconf, &alias_module);
+    char *ret;
+    int status;
+
+    /* It may have changed since last time, so try again */
+
+    if ((ret = try_redirect(r, &status)) != NULL
+            || (ret = try_alias_list(r, dirconf->redirects, 1, &status))
+                    != NULL) {
+        if (ret == PREGSUB_ERROR)
+            return HTTP_INTERNAL_SERVER_ERROR;
+        if (ap_is_HTTP_REDIRECT(status)) {
+            if (ret[0] == '/') {
+                char *orig_target = ret;
+
+                ret = ap_construct_url(r->pool, ret, r);
+                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00675)
+                              "incomplete redirection target of '%s' for "
+                              "URI '%s' modified to '%s'",
+                              orig_target, r->uri, ret);
+            }
+            if (!ap_is_url(ret)) {
+                status = HTTP_INTERNAL_SERVER_ERROR;
+                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00676)
+                              "cannot redirect '%s' to '%s'; "
+                              "target is not a valid absoluteURI or abs_path",
+                              r->uri, ret);
+            }
+            else {
+                /* append requested query only, if the config didn't
+                 * supply its own.
+                 */
+                if (r->args && !ap_strchr(ret, '?')) {
+                    ret = apr_pstrcat(r->pool, ret, "?", r->args, NULL);
+                }
+                apr_table_setn(r->headers_out, "Location", ret);
+            }
+        }
+        return status;
+    }
+
+    return DECLINED;
+}
+
+static void register_hooks(apr_pool_t *p)
+{
+    static const char * const aszSucc[]={ "mod_userdir.c",
+                                          "mod_vhost_alias.c",NULL };
+
+    ap_hook_translate_name(translate_alias_redir,NULL,aszSucc,APR_HOOK_MIDDLE);
+    ap_hook_fixups(fixup_redir,NULL,NULL,APR_HOOK_MIDDLE);
+}
+
+AP_DECLARE_MODULE(alias) =
+{
+    STANDARD20_MODULE_STUFF,
+    create_alias_dir_config,       /* dir config creater */
+    merge_alias_dir_config,        /* dir merger --- default is to override */
+    create_alias_config,           /* server config */
+    merge_alias_config,            /* merge server configs */
+    alias_cmds,                    /* command apr_table_t */
+    register_hooks                 /* register hooks */
+};