Adding upstream version 2.4.57.upstream/2.4.57

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

8 files changed, 3103 insertions, 0 deletions

diff --git a/modules/arch/win32/Makefile.in b/modules/arch/win32/Makefile.in
new file mode 100644
index 0000000..7c5c149
--- /dev/null
+++ b/modules/arch/win32/Makefile.in
@@ -0,0 +1,3 @@
+# a modules Makefile has no explicit targets -- they will be defined by
+# whatever modules are enabled. just grab special.mk to deal with this.
+include $(top_srcdir)/build/special.mk
diff --git a/modules/arch/win32/config.m4 b/modules/arch/win32/config.m4
new file mode 100644
index 0000000..584e76d
--- /dev/null
+++ b/modules/arch/win32/config.m4
@@ -0,0 +1,9 @@
+dnl modules enabled in this directory by default
+
+dnl APACHE_MODULE(name, helptext[, objects[, structname[, default[, config]]]])
+
+APACHE_MODPATH_INIT(arch/win32)
+
+APACHE_MODULE(isapi, isapi extension support, , , no)
+
+APACHE_MODPATH_FINISH
diff --git a/modules/arch/win32/mod_isapi.c b/modules/arch/win32/mod_isapi.c
new file mode 100644
index 0000000..a9816e5
--- /dev/null
+++ b/modules/arch/win32/mod_isapi.c
@@ -0,0 +1,1728 @@
+/* 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.
+ */
+
+/*
+ * mod_isapi.c - Internet Server Application (ISA) module for Apache
+ * by Alexei Kosut <akosut@apache.org>, significant overhauls and
+ * redesign by William Rowe <wrowe@covalent.net>, and hints from many
+ * other developer/users who have hit on specific flaws.
+ *
+ * This module implements the ISAPI Handler architecture, allowing
+ * Apache to load Internet Server Applications (ISAPI extensions),
+ * similar to the support in IIS, Zope, O'Reilly's WebSite and others.
+ *
+ * It is a complete implementation of the ISAPI 2.0 specification,
+ * except for "Microsoft extensions" to the API which provide
+ * asynchronous I/O.  It is further extended to include additional
+ * "Microsoft extensions" through IIS 5.0, with some deficiencies
+ * where one-to-one mappings don't exist.
+ *
+ * Refer to /manual/mod/mod_isapi.html for additional details on
+ * configuration and use, but check this source for specific support
+ * of the API,
+ */
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_protocol.h"
+#include "http_request.h"
+#include "http_log.h"
+#include "util_script.h"
+#include "mod_core.h"
+#include "apr_lib.h"
+#include "apr_strings.h"
+#include "apr_portable.h"
+#include "apr_buckets.h"
+#include "apr_thread_mutex.h"
+#include "apr_thread_rwlock.h"
+#include "apr_hash.h"
+#include "mod_isapi.h"
+
+/* Retry frequency for a failed-to-load isapi .dll */
+#define ISAPI_RETRY apr_time_from_sec(30)
+
+/**********************************************************
+ *
+ *  ISAPI Module Configuration
+ *
+ **********************************************************/
+
+module AP_MODULE_DECLARE_DATA isapi_module;
+
+#define ISAPI_UNDEF -1
+
+/* Our isapi per-dir config structure */
+typedef struct isapi_dir_conf {
+    int read_ahead_buflen;
+    int log_unsupported;
+    int log_to_errlog;
+    int log_to_query;
+    int fake_async;
+} isapi_dir_conf;
+
+typedef struct isapi_loaded isapi_loaded;
+
+apr_status_t isapi_lookup(apr_pool_t *p, server_rec *s, request_rec *r,
+                          const char *fpath, isapi_loaded** isa);
+
+static void *create_isapi_dir_config(apr_pool_t *p, char *dummy)
+{
+    isapi_dir_conf *dir = apr_palloc(p, sizeof(isapi_dir_conf));
+
+    dir->read_ahead_buflen = ISAPI_UNDEF;
+    dir->log_unsupported   = ISAPI_UNDEF;
+    dir->log_to_errlog     = ISAPI_UNDEF;
+    dir->log_to_query      = ISAPI_UNDEF;
+    dir->fake_async        = ISAPI_UNDEF;
+
+    return dir;
+}
+
+static void *merge_isapi_dir_configs(apr_pool_t *p, void *base_, void *add_)
+{
+    isapi_dir_conf *base = (isapi_dir_conf *) base_;
+    isapi_dir_conf *add = (isapi_dir_conf *) add_;
+    isapi_dir_conf *dir = apr_palloc(p, sizeof(isapi_dir_conf));
+
+    dir->read_ahead_buflen = (add->read_ahead_buflen == ISAPI_UNDEF)
+                                ? base->read_ahead_buflen
+                                 : add->read_ahead_buflen;
+    dir->log_unsupported   = (add->log_unsupported == ISAPI_UNDEF)
+                                ? base->log_unsupported
+                                 : add->log_unsupported;
+    dir->log_to_errlog     = (add->log_to_errlog == ISAPI_UNDEF)
+                                ? base->log_to_errlog
+                                 : add->log_to_errlog;
+    dir->log_to_query      = (add->log_to_query == ISAPI_UNDEF)
+                                ? base->log_to_query
+                                 : add->log_to_query;
+    dir->fake_async        = (add->fake_async == ISAPI_UNDEF)
+                                ? base->fake_async
+                                 : add->fake_async;
+
+    return dir;
+}
+
+static const char *isapi_cmd_cachefile(cmd_parms *cmd, void *dummy,
+                                       const char *filename)
+{
+    isapi_loaded *isa;
+    apr_finfo_t tmp;
+    apr_status_t rv;
+    char *fspec;
+
+    /* ### Just an observation ... it would be terribly cool to be
+     * able to use this per-dir, relative to the directory block being
+     * defined.  The hash result remains global, but shorthand of
+     * <Directory "c:/webapps/isapi">
+     *     ISAPICacheFile myapp.dll anotherapp.dll thirdapp.dll
+     * </Directory>
+     * would be very convienent.
+     */
+    fspec = ap_server_root_relative(cmd->pool, filename);
+    if (!fspec) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, APR_EBADPATH, cmd->server, APLOGNO(02103)
+                     "invalid module path, skipping %s", filename);
+        return NULL;
+    }
+    if ((rv = apr_stat(&tmp, fspec, APR_FINFO_TYPE,
+                      cmd->temp_pool)) != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, rv, cmd->server, APLOGNO(02104)
+                     "unable to stat, skipping %s", fspec);
+        return NULL;
+    }
+    if (tmp.filetype != APR_REG) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(02105)
+                     "not a regular file, skipping %s", fspec);
+        return NULL;
+    }
+
+    /* Load the extension as cached (with null request_rec) */
+    rv = isapi_lookup(cmd->pool, cmd->server, NULL, fspec, &isa);
+    if (rv != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, rv, cmd->server, APLOGNO(02106)
+                     "unable to cache, skipping %s", fspec);
+        return NULL;
+    }
+
+    return NULL;
+}
+
+static const command_rec isapi_cmds[] = {
+    AP_INIT_TAKE1("ISAPIReadAheadBuffer", ap_set_int_slot,
+        (void *)APR_OFFSETOF(isapi_dir_conf, read_ahead_buflen),
+        OR_FILEINFO, "Maximum client request body to initially pass to the"
+                     " ISAPI handler (default: 49152)"),
+    AP_INIT_FLAG("ISAPILogNotSupported", ap_set_flag_slot,
+        (void *)APR_OFFSETOF(isapi_dir_conf, log_unsupported),
+        OR_FILEINFO, "Log requests not supported by the ISAPI server"
+                     " on or off (default: off)"),
+    AP_INIT_FLAG("ISAPIAppendLogToErrors", ap_set_flag_slot,
+        (void *)APR_OFFSETOF(isapi_dir_conf, log_to_errlog),
+        OR_FILEINFO, "Send all Append Log requests to the error log"
+                     " on or off (default: off)"),
+    AP_INIT_FLAG("ISAPIAppendLogToQuery", ap_set_flag_slot,
+        (void *)APR_OFFSETOF(isapi_dir_conf, log_to_query),
+        OR_FILEINFO, "Append Log requests are concatenated to the query args"
+                     " on or off (default: on)"),
+    AP_INIT_FLAG("ISAPIFakeAsync", ap_set_flag_slot,
+        (void *)APR_OFFSETOF(isapi_dir_conf, fake_async),
+        OR_FILEINFO, "Fake Asynchronous support for isapi callbacks"
+                     " on or off [Experimental] (default: off)"),
+    AP_INIT_ITERATE("ISAPICacheFile", isapi_cmd_cachefile, NULL,
+        RSRC_CONF, "Cache the specified ISAPI extension in-process"),
+    {NULL}
+};
+
+/**********************************************************
+ *
+ *  ISAPI Module Cache handling section
+ *
+ **********************************************************/
+
+/* Our isapi global config values */
+static struct isapi_global_conf {
+    apr_pool_t         *pool;
+    apr_thread_mutex_t *lock;
+    apr_hash_t         *hash;
+} loaded;
+
+/* Our loaded isapi module description structure */
+struct isapi_loaded {
+    const char          *filename;
+    apr_thread_rwlock_t *in_progress;
+    apr_status_t         last_load_rv;
+    apr_time_t           last_load_time;
+    apr_dso_handle_t    *handle;
+    HSE_VERSION_INFO    *isapi_version;
+    apr_uint32_t         report_version;
+    apr_uint32_t         timeout;
+    PFN_GETEXTENSIONVERSION GetExtensionVersion;
+    PFN_HTTPEXTENSIONPROC   HttpExtensionProc;
+    PFN_TERMINATEEXTENSION  TerminateExtension;
+};
+
+static apr_status_t isapi_unload(isapi_loaded *isa, int force)
+{
+    /* All done with the DLL... get rid of it...
+     *
+     * If optionally cached, and we weren't asked to force the unload,
+     * pass HSE_TERM_ADVISORY_UNLOAD, and if it returns 1, unload,
+     * otherwise, leave it alone (it didn't choose to cooperate.)
+     */
+    if (!isa->handle) {
+        return APR_SUCCESS;
+    }
+    if (isa->TerminateExtension) {
+        if (force) {
+            (*isa->TerminateExtension)(HSE_TERM_MUST_UNLOAD);
+        }
+        else if (!(*isa->TerminateExtension)(HSE_TERM_ADVISORY_UNLOAD)) {
+            return APR_EGENERAL;
+        }
+    }
+    apr_dso_unload(isa->handle);
+    isa->handle = NULL;
+    return APR_SUCCESS;
+}
+
+static apr_status_t cleanup_isapi(void *isa_)
+{
+    isapi_loaded* isa = (isapi_loaded*) isa_;
+
+    /* We must force the module to unload, we are about
+     * to lose the isapi structure's allocation entirely.
+     */
+    return isapi_unload(isa, 1);
+}
+
+static apr_status_t isapi_load(apr_pool_t *p, server_rec *s, isapi_loaded *isa)
+{
+    apr_status_t rv;
+
+    isa->isapi_version = apr_pcalloc(p, sizeof(HSE_VERSION_INFO));
+
+    /* TODO: These aught to become overridable, so that we
+     * assure a given isapi can be fooled into behaving well.
+     *
+     * The tricky bit, they aren't really a per-dir sort of
+     * config, they will always be constant across every
+     * reference to the .dll no matter what context (vhost,
+     * location, etc) they apply to.
+     */
+    isa->report_version = 0x500; /* Revision 5.0 */
+    isa->timeout = 300 * 1000000; /* microsecs, not used */
+
+    rv = apr_dso_load(&isa->handle, isa->filename, p);
+    if (rv)
+    {
+        ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(02107)
+                     "failed to load %s", isa->filename);
+        isa->handle = NULL;
+        return rv;
+    }
+
+    rv = apr_dso_sym((void**)&isa->GetExtensionVersion, isa->handle,
+                     "GetExtensionVersion");
+    if (rv)
+    {
+        ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(02108)
+                     "missing GetExtensionVersion() in %s",
+                     isa->filename);
+        apr_dso_unload(isa->handle);
+        isa->handle = NULL;
+        return rv;
+    }
+
+    rv = apr_dso_sym((void**)&isa->HttpExtensionProc, isa->handle,
+                     "HttpExtensionProc");
+    if (rv)
+    {
+        ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(02109)
+                     "missing HttpExtensionProc() in %s",
+                     isa->filename);
+        apr_dso_unload(isa->handle);
+        isa->handle = NULL;
+        return rv;
+    }
+
+    /* TerminateExtension() is an optional interface */
+    rv = apr_dso_sym((void**)&isa->TerminateExtension, isa->handle,
+                     "TerminateExtension");
+    apr_set_os_error(0);
+
+    /* Run GetExtensionVersion() */
+    if (!(isa->GetExtensionVersion)(isa->isapi_version)) {
+        apr_status_t rv = apr_get_os_error();
+        ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(02110)
+                     "failed call to GetExtensionVersion() in %s",
+                     isa->filename);
+        apr_dso_unload(isa->handle);
+        isa->handle = NULL;
+        return rv;
+    }
+
+    apr_pool_cleanup_register(p, isa, cleanup_isapi,
+                              apr_pool_cleanup_null);
+
+    return APR_SUCCESS;
+}
+
+apr_status_t isapi_lookup(apr_pool_t *p, server_rec *s, request_rec *r,
+                          const char *fpath, isapi_loaded** isa)
+{
+    apr_status_t rv;
+    const char *key;
+
+    if ((rv = apr_thread_mutex_lock(loaded.lock)) != APR_SUCCESS) {
+        return rv;
+    }
+
+    *isa = apr_hash_get(loaded.hash, fpath, APR_HASH_KEY_STRING);
+
+    if (*isa) {
+
+        /* If we find this lock exists, use a set-aside copy of gainlock
+         * to avoid race conditions on NULLing the in_progress variable
+         * when the load has completed.  Release the global isapi hash
+         * lock so other requests can proceed, then rdlock for completion
+         * of loading our desired dll or wrlock if we would like to retry
+         * loading the dll (because last_load_rv failed and retry is up.)
+         */
+        apr_thread_rwlock_t *gainlock = (*isa)->in_progress;
+
+        /* gainlock is NULLed after the module loads successfully.
+         * This free-threaded module can be used without any locking.
+         */
+        if (!gainlock) {
+            rv = (*isa)->last_load_rv;
+            apr_thread_mutex_unlock(loaded.lock);
+            return rv;
+        }
+
+
+        if ((*isa)->last_load_rv == APR_SUCCESS) {
+            apr_thread_mutex_unlock(loaded.lock);
+            if ((rv = apr_thread_rwlock_rdlock(gainlock))
+                    != APR_SUCCESS) {
+                return rv;
+            }
+            rv = (*isa)->last_load_rv;
+            apr_thread_rwlock_unlock(gainlock);
+            return rv;
+        }
+
+        if (apr_time_now() > (*isa)->last_load_time + ISAPI_RETRY) {
+
+            /* Remember last_load_time before releasing the global
+             * hash lock to avoid colliding with another thread
+             * that hit this exception at the same time as our
+             * retry attempt, since we unlock the global mutex
+             * before attempting a write lock for this module.
+             */
+            apr_time_t check_time = (*isa)->last_load_time;
+            apr_thread_mutex_unlock(loaded.lock);
+
+            if ((rv = apr_thread_rwlock_wrlock(gainlock))
+                    != APR_SUCCESS) {
+                return rv;
+            }
+
+            /* If last_load_time is unchanged, we still own this
+             * retry, otherwise presume another thread provided
+             * our retry (for good or ill).  Relock the global
+             * hash for updating last_load_ vars, so their update
+             * is always atomic to the global lock.
+             */
+            if (check_time == (*isa)->last_load_time) {
+
+                rv = isapi_load(loaded.pool, s, *isa);
+
+                apr_thread_mutex_lock(loaded.lock);
+                (*isa)->last_load_rv = rv;
+                (*isa)->last_load_time = apr_time_now();
+                apr_thread_mutex_unlock(loaded.lock);
+            }
+            else {
+                rv = (*isa)->last_load_rv;
+            }
+            apr_thread_rwlock_unlock(gainlock);
+
+            return rv;
+        }
+
+        /* We haven't hit timeup on retry, let's grab the last_rv
+         * within the hash mutex before unlocking.
+         */
+        rv = (*isa)->last_load_rv;
+        apr_thread_mutex_unlock(loaded.lock);
+
+        return rv;
+    }
+
+    /* If the module was not found, it's time to create a hash key entry
+     * before releasing the hash lock to avoid multiple threads from
+     * loading the same module.
+     */
+    key = apr_pstrdup(loaded.pool, fpath);
+    *isa = apr_pcalloc(loaded.pool, sizeof(isapi_loaded));
+    (*isa)->filename = key;
+    if (r) {
+        /* A mutex that exists only long enough to attempt to
+         * load this isapi dll, the release this module to all
+         * other takers that came along during the one-time
+         * load process.  Short lifetime for this lock would
+         * be great, however, using r->pool is nasty if those
+         * blocked on the lock haven't all unlocked before we
+         * attempt to destroy.  A nastier race condition than
+         * I want to deal with at this moment...
+         */
+        apr_thread_rwlock_create(&(*isa)->in_progress, loaded.pool);
+        apr_thread_rwlock_wrlock((*isa)->in_progress);
+    }
+
+    apr_hash_set(loaded.hash, key, APR_HASH_KEY_STRING, *isa);
+
+    /* Now attempt to load the isapi on our own time,
+     * allow other isapi processing to resume.
+     */
+    apr_thread_mutex_unlock(loaded.lock);
+
+    rv = isapi_load(loaded.pool, s, *isa);
+    (*isa)->last_load_time = apr_time_now();
+    (*isa)->last_load_rv = rv;
+
+    if (r && (rv == APR_SUCCESS)) {
+        /* Let others who are blocked on this particular
+         * module resume their requests, for better or worse.
+         */
+        apr_thread_rwlock_t *unlock = (*isa)->in_progress;
+        (*isa)->in_progress = NULL;
+        apr_thread_rwlock_unlock(unlock);
+    }
+    else if (!r && (rv != APR_SUCCESS)) {
+        /* We must leave a rwlock around for requests to retry
+         * loading this dll after timeup... since we were in
+         * the setup code we had avoided creating this lock.
+         */
+        apr_thread_rwlock_create(&(*isa)->in_progress, loaded.pool);
+    }
+
+    return (*isa)->last_load_rv;
+}
+
+/**********************************************************
+ *
+ *  ISAPI Module request callbacks section
+ *
+ **********************************************************/
+
+/* Our "Connection ID" structure */
+struct isapi_cid {
+    EXTENSION_CONTROL_BLOCK *ecb;
+    isapi_dir_conf           dconf;
+    isapi_loaded            *isa;
+    request_rec             *r;
+    int                      headers_set;
+    int                      response_sent;
+    PFN_HSE_IO_COMPLETION    completion;
+    void                    *completion_arg;
+    apr_thread_mutex_t      *completed;
+};
+
+static int APR_THREAD_FUNC regfnGetServerVariable(isapi_cid    *cid,
+                                                  char         *variable_name,
+                                                  void         *buf_ptr,
+                                                  apr_uint32_t *buf_size)
+{
+    request_rec *r = cid->r;
+    const char *result;
+    char *buf_data = (char*)buf_ptr;
+    apr_uint32_t len;
+
+    if (!strcmp(variable_name, "ALL_HTTP"))
+    {
+        /* crlf delimited, colon split, comma separated and
+         * null terminated list of HTTP_ vars
+         */
+        const apr_array_header_t *arr = apr_table_elts(r->subprocess_env);
+        const apr_table_entry_t *elts = (const apr_table_entry_t *)arr->elts;
+        int i;
+
+        for (len = 0, i = 0; i < arr->nelts; i++) {
+            if (!strncmp(elts[i].key, "HTTP_", 5)) {
+                len += strlen(elts[i].key) + strlen(elts[i].val) + 3;
+            }
+        }
+
+        if (*buf_size < len + 1) {
+            *buf_size = len + 1;
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INSUFFICIENT_BUFFER));
+            return 0;
+        }
+
+        for (i = 0; i < arr->nelts; i++) {
+            if (!strncmp(elts[i].key, "HTTP_", 5)) {
+                strcpy(buf_data, elts[i].key);
+                buf_data += strlen(elts[i].key);
+                *(buf_data++) = ':';
+                strcpy(buf_data, elts[i].val);
+                buf_data += strlen(elts[i].val);
+                *(buf_data++) = '\r';
+                *(buf_data++) = '\n';
+            }
+        }
+
+        *(buf_data++) = '\0';
+        *buf_size = len + 1;
+        return 1;
+    }
+
+    if (!strcmp(variable_name, "ALL_RAW"))
+    {
+        /* crlf delimited, colon split, comma separated and
+         * null terminated list of the raw request header
+         */
+        const apr_array_header_t *arr = apr_table_elts(r->headers_in);
+        const apr_table_entry_t *elts = (const apr_table_entry_t *)arr->elts;
+        int i;
+
+        for (len = 0, i = 0; i < arr->nelts; i++) {
+            len += strlen(elts[i].key) + strlen(elts[i].val) + 4;
+        }
+
+        if (*buf_size < len + 1) {
+            *buf_size = len + 1;
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INSUFFICIENT_BUFFER));
+            return 0;
+        }
+
+        for (i = 0; i < arr->nelts; i++) {
+            strcpy(buf_data, elts[i].key);
+            buf_data += strlen(elts[i].key);
+            *(buf_data++) = ':';
+            *(buf_data++) = ' ';
+            strcpy(buf_data, elts[i].val);
+            buf_data += strlen(elts[i].val);
+            *(buf_data++) = '\r';
+            *(buf_data++) = '\n';
+        }
+        *(buf_data++) = '\0';
+        *buf_size = len + 1;
+        return 1;
+    }
+
+    /* Not a special case */
+    result = apr_table_get(r->subprocess_env, variable_name);
+
+    if (result) {
+        len = strlen(result);
+        if (*buf_size < len + 1) {
+            *buf_size = len + 1;
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INSUFFICIENT_BUFFER));
+            return 0;
+        }
+        strcpy(buf_data, result);
+        *buf_size = len + 1;
+        return 1;
+    }
+
+    /* Not Found */
+    apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_INDEX));
+    return 0;
+}
+
+static int APR_THREAD_FUNC regfnReadClient(isapi_cid    *cid,
+                                           void         *buf_data,
+                                           apr_uint32_t *buf_size)
+{
+    request_rec *r = cid->r;
+    apr_uint32_t read = 0;
+    int res = 0;
+
+    if (r->remaining < *buf_size) {
+        *buf_size = (apr_size_t)r->remaining;
+    }
+
+    while (read < *buf_size &&
+           ((res = ap_get_client_block(r, (char*)buf_data + read,
+                                       *buf_size - read)) > 0)) {
+        read += res;
+    }
+
+    *buf_size = read;
+    if (res < 0) {
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_READ_FAULT));
+    }
+    return (res >= 0);
+}
+
+/* Common code invoked for both HSE_REQ_SEND_RESPONSE_HEADER and
+ * the newer HSE_REQ_SEND_RESPONSE_HEADER_EX ServerSupportFunction(s)
+ * as well as other functions that write responses and presume that
+ * the support functions above are optional.
+ *
+ * Other callers trying to split headers and body bytes should pass
+ * head/headlen alone (leaving stat/statlen NULL/0), so that they
+ * get a proper count of bytes consumed.  The argument passed to stat
+ * isn't counted as the head bytes are.
+ */
+static apr_ssize_t send_response_header(isapi_cid *cid,
+                                        const char *stat,
+                                        const char *head,
+                                        apr_size_t statlen,
+                                        apr_size_t headlen)
+{
+    int head_present = 1;
+    int termarg;
+    int res;
+    int old_status;
+    const char *termch;
+    apr_size_t ate = 0;
+
+    if (!head || headlen == 0 || !*head) {
+        head = stat;
+        stat = NULL;
+        headlen = statlen;
+        statlen = 0;
+        head_present = 0; /* Don't eat the header */
+    }
+
+    if (!stat || statlen == 0 || !*stat) {
+        if (head && headlen && *head && ((stat = memchr(head, '\r', headlen))
+                                      || (stat = memchr(head, '\n', headlen))
+                                      || (stat = memchr(head, '\0', headlen))
+                                      || (stat = head + headlen))) {
+            statlen = stat - head;
+            if (memchr(head, ':', statlen)) {
+                stat = "Status: 200 OK";
+                statlen = strlen(stat);
+            }
+            else {
+                const char *flip = head;
+                head = stat;
+                stat = flip;
+                headlen -= statlen;
+                ate += statlen;
+                if (*head == '\r' && headlen)
+                    ++head, --headlen, ++ate;
+                if (*head == '\n' && headlen)
+                    ++head, --headlen, ++ate;
+            }
+        }
+    }
+
+    if (stat && (statlen > 0) && *stat) {
+        char *newstat;
+        if (!apr_isdigit(*stat)) {
+            const char *stattok = stat;
+            int toklen = statlen;
+            while (toklen && *stattok && !apr_isspace(*stattok)) {
+                ++stattok; --toklen;
+            }
+            while (toklen && apr_isspace(*stattok)) {
+                ++stattok; --toklen;
+            }
+            /* Now decide if we follow the xxx message
+             * or the http/x.x xxx message format
+             */
+            if (toklen && apr_isdigit(*stattok)) {
+                statlen = toklen;
+                stat = stattok;
+            }
+        }
+        newstat = apr_palloc(cid->r->pool, statlen + 9);
+        strcpy(newstat, "Status: ");
+        apr_cpystrn(newstat + 8, stat, statlen + 1);
+        stat = newstat;
+        statlen += 8;
+    }
+
+    if (!head || headlen == 0 || !*head) {
+        head = "\r\n";
+        headlen = 2;
+    }
+    else
+    {
+        if (head[headlen - 1] && head[headlen]) {
+            /* Whoops... not NULL terminated */
+            head = apr_pstrndup(cid->r->pool, head, headlen);
+        }
+    }
+
+    /* Seems IIS does not enforce the requirement for \r\n termination
+     * on HSE_REQ_SEND_RESPONSE_HEADER, but we won't panic...
+     * ap_scan_script_header_err_strs handles this aspect for us.
+     *
+     * Parse them out, or die trying
+     */
+    old_status = cid->r->status;
+
+    if (stat) {
+        res = ap_scan_script_header_err_strs_ex(cid->r, NULL,
+                APLOG_MODULE_INDEX, &termch, &termarg, stat, head, NULL);
+    }
+    else {
+        res = ap_scan_script_header_err_strs_ex(cid->r, NULL,
+                APLOG_MODULE_INDEX, &termch, &termarg, head, NULL);
+    }
+
+    /* Set our status. */
+    if (res) {
+        /* This is an immediate error result from the parser
+         */
+        cid->r->status = res;
+        cid->r->status_line = ap_get_status_line(cid->r->status);
+        cid->ecb->dwHttpStatusCode = cid->r->status;
+    }
+    else if (cid->r->status) {
+        /* We have a status in r->status, so let's just use it.
+         * This is likely to be the Status: parsed above, and
+         * may also be a delayed error result from the parser.
+         * If it was filled in, status_line should also have
+         * been filled in.
+         */
+        cid->ecb->dwHttpStatusCode = cid->r->status;
+    }
+    else if (cid->ecb->dwHttpStatusCode
+              && cid->ecb->dwHttpStatusCode != HTTP_OK) {
+        /* Now we fall back on dwHttpStatusCode if it appears
+         * ap_scan_script_header fell back on the default code.
+         * Any other results set dwHttpStatusCode to the decoded
+         * status value.
+         */
+        cid->r->status = cid->ecb->dwHttpStatusCode;
+        cid->r->status_line = ap_get_status_line(cid->r->status);
+    }
+    else if (old_status) {
+        /* Well... either there is no dwHttpStatusCode or it's HTTP_OK.
+         * In any case, we don't have a good status to return yet...
+         * Perhaps the one we came in with will be better. Let's use it,
+         * if we were given one (note this is a pedantic case, it would
+         * normally be covered above unless the scan script code unset
+         * the r->status). Should there be a check here as to whether
+         * we are setting a valid response code?
+         */
+        cid->r->status = old_status;
+        cid->r->status_line = ap_get_status_line(cid->r->status);
+        cid->ecb->dwHttpStatusCode = cid->r->status;
+    }
+    else {
+        /* None of dwHttpStatusCode, the parser's r->status nor the
+         * old value of r->status were helpful, and nothing was decoded
+         * from Status: string passed to us.  Let's just say HTTP_OK
+         * and get the data out, this was the isapi dev's oversight.
+         */
+        cid->r->status = HTTP_OK;
+        cid->r->status_line = ap_get_status_line(cid->r->status);
+        cid->ecb->dwHttpStatusCode = cid->r->status;
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, cid->r, APLOGNO(02111)
+                "Could not determine HTTP response code; using %d",
+                cid->r->status);
+    }
+
+    if (cid->r->status == HTTP_INTERNAL_SERVER_ERROR) {
+        return -1;
+    }
+
+    /* If only Status was passed, we consumed nothing
+     */
+    if (!head_present)
+        return 0;
+
+    cid->headers_set = 1;
+
+    /* If all went well, tell the caller we consumed the headers complete
+     */
+    if (!termch)
+        return(ate + headlen);
+
+    /* Any data left must be sent directly by the caller, all we
+     * give back is the size of the headers we consumed (which only
+     * happens if the parser got to the head arg, which varies based
+     * on whether we passed stat+head to scan, or only head.
+     */
+    if (termch && (termarg == (stat ? 1 : 0))
+               && head_present && head + headlen > termch) {
+        return ate + termch - head;
+    }
+    return ate;
+}
+
+static int APR_THREAD_FUNC regfnWriteClient(isapi_cid    *cid,
+                                            void         *buf_ptr,
+                                            apr_uint32_t *size_arg,
+                                            apr_uint32_t  flags)
+{
+    request_rec *r = cid->r;
+    conn_rec *c = r->connection;
+    apr_uint32_t buf_size = *size_arg;
+    char *buf_data = (char*)buf_ptr;
+    apr_bucket_brigade *bb;
+    apr_bucket *b;
+    apr_status_t rv = APR_SUCCESS;
+
+    if (!cid->headers_set) {
+        /* It appears that the foxisapi module and other clients
+         * presume that WriteClient("headers\n\nbody") will work.
+         * Parse them out, or die trying.
+         */
+        apr_ssize_t ate;
+        ate = send_response_header(cid, NULL, buf_data, 0, buf_size);
+        if (ate < 0) {
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+            return 0;
+        }
+
+        buf_data += ate;
+        buf_size -= ate;
+    }
+
+    if (buf_size) {
+        bb = apr_brigade_create(r->pool, c->bucket_alloc);
+        b = apr_bucket_transient_create(buf_data, buf_size, c->bucket_alloc);
+        APR_BRIGADE_INSERT_TAIL(bb, b);
+        b = apr_bucket_flush_create(c->bucket_alloc);
+        APR_BRIGADE_INSERT_TAIL(bb, b);
+        rv = ap_pass_brigade(r->output_filters, bb);
+        cid->response_sent = 1;
+        if (rv != APR_SUCCESS)
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, APLOGNO(02984)
+                          "WriteClient ap_pass_brigade failed: %s",
+                          r->filename);
+    }
+
+    if ((flags & HSE_IO_ASYNC) && cid->completion) {
+        if (rv == APR_SUCCESS) {
+            cid->completion(cid->ecb, cid->completion_arg,
+                            *size_arg, ERROR_SUCCESS);
+        }
+        else {
+            cid->completion(cid->ecb, cid->completion_arg,
+                            *size_arg, ERROR_WRITE_FAULT);
+        }
+    }
+    return (rv == APR_SUCCESS);
+}
+
+static int APR_THREAD_FUNC regfnServerSupportFunction(isapi_cid    *cid,
+                                                      apr_uint32_t  HSE_code,
+                                                      void         *buf_ptr,
+                                                      apr_uint32_t *buf_size,
+                                                      apr_uint32_t *data_type)
+{
+    request_rec *r = cid->r;
+    conn_rec *c = r->connection;
+    char *buf_data = (char*)buf_ptr;
+    request_rec *subreq;
+    apr_status_t rv;
+
+    switch (HSE_code) {
+    case HSE_REQ_SEND_URL_REDIRECT_RESP:
+        /* Set the status to be returned when the HttpExtensionProc()
+         * is done.
+         * WARNING: Microsoft now advertises HSE_REQ_SEND_URL_REDIRECT_RESP
+         *          and HSE_REQ_SEND_URL as equivalent per the Jan 2000 SDK.
+         *          They most definitely are not, even in their own samples.
+         */
+        apr_table_set (r->headers_out, "Location", buf_data);
+        cid->r->status = cid->ecb->dwHttpStatusCode = HTTP_MOVED_TEMPORARILY;
+        cid->r->status_line = ap_get_status_line(cid->r->status);
+        cid->headers_set = 1;
+        return 1;
+
+    case HSE_REQ_SEND_URL:
+        /* Soak up remaining input */
+        if (r->remaining > 0) {
+            char argsbuffer[HUGE_STRING_LEN];
+            while (ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN));
+        }
+
+        /* Reset the method to GET */
+        r->method = "GET";
+        r->method_number = M_GET;
+
+        /* Don't let anyone think there's still data */
+        apr_table_unset(r->headers_in, "Content-Length");
+
+        /* AV fault per PR3598 - redirected path is lost! */
+        buf_data = apr_pstrdup(r->pool, (char*)buf_data);
+        ap_internal_redirect(buf_data, r);
+        return 1;
+
+    case HSE_REQ_SEND_RESPONSE_HEADER:
+    {
+        /* Parse them out, or die trying */
+        apr_size_t statlen = 0, headlen = 0;
+        apr_ssize_t ate;
+        if (buf_data)
+            statlen = strlen((char*) buf_data);
+        if (data_type)
+            headlen = strlen((char*) data_type);
+        ate = send_response_header(cid, (char*) buf_data,
+                                   (char*) data_type,
+                                   statlen, headlen);
+        if (ate < 0) {
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+            return 0;
+        }
+        else if ((apr_size_t)ate < headlen) {
+            apr_bucket_brigade *bb;
+            apr_bucket *b;
+            bb = apr_brigade_create(cid->r->pool, c->bucket_alloc);
+            b = apr_bucket_transient_create((char*) data_type + ate,
+                                           headlen - ate, c->bucket_alloc);
+            APR_BRIGADE_INSERT_TAIL(bb, b);
+            b = apr_bucket_flush_create(c->bucket_alloc);
+            APR_BRIGADE_INSERT_TAIL(bb, b);
+            rv = ap_pass_brigade(cid->r->output_filters, bb);
+            cid->response_sent = 1;
+            if (rv != APR_SUCCESS)
+                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, APLOGNO(03177)
+                              "ServerSupportFunction "
+                              "HSE_REQ_SEND_RESPONSE_HEADER "
+                              "ap_pass_brigade failed: %s", r->filename);
+            return (rv == APR_SUCCESS);
+        }
+        /* Deliberately hold off sending 'just the headers' to begin to
+         * accumulate the body and speed up the overall response, or at
+         * least wait for the end the session.
+         */
+        return 1;
+    }
+
+    case HSE_REQ_DONE_WITH_SESSION:
+        /* Signal to resume the thread completing this request,
+         * leave it to the pool cleanup to dispose of our mutex.
+         */
+        if (cid->completed) {
+            (void)apr_thread_mutex_unlock(cid->completed);
+            return 1;
+        }
+        else if (cid->dconf.log_unsupported) {
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02671)
+                          "ServerSupportFunction "
+                          "HSE_REQ_DONE_WITH_SESSION is not supported: %s",
+                          r->filename);
+        }
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_REQ_MAP_URL_TO_PATH:
+    {
+        /* Map a URL to a filename */
+        char *file = (char *)buf_data;
+        apr_uint32_t len;
+        subreq = ap_sub_req_lookup_uri(
+                     apr_pstrndup(cid->r->pool, file, *buf_size), r, NULL);
+
+        if (!subreq->filename) {
+            ap_destroy_sub_req(subreq);
+            return 0;
+        }
+
+        len = (apr_uint32_t)strlen(subreq->filename);
+
+        if ((subreq->finfo.filetype == APR_DIR)
+              && (!subreq->path_info)
+              && (subreq->filename[len - 1] != '/'))
+            file = apr_pstrcat(cid->r->pool, subreq->filename, "/", NULL);
+        else
+            file = apr_pstrcat(cid->r->pool, subreq->filename,
+                                              subreq->path_info, NULL);
+
+        ap_destroy_sub_req(subreq);
+
+#ifdef WIN32
+        /* We need to make this a real Windows path name */
+        apr_filepath_merge(&file, "", file, APR_FILEPATH_NATIVE, r->pool);
+#endif
+
+        *buf_size = apr_cpystrn(buf_data, file, *buf_size) - buf_data;
+
+        return 1;
+    }
+
+    case HSE_REQ_GET_SSPI_INFO:
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02672)
+                           "ServerSupportFunction HSE_REQ_GET_SSPI_INFO "
+                           "is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_APPEND_LOG_PARAMETER:
+        /* Log buf_data, of buf_size bytes, in the URI Query (cs-uri-query) field
+         */
+        apr_table_set(r->notes, "isapi-parameter", (char*) buf_data);
+        if (cid->dconf.log_to_query) {
+            if (r->args)
+                r->args = apr_pstrcat(r->pool, r->args, (char*) buf_data, NULL);
+            else
+                r->args = apr_pstrdup(r->pool, (char*) buf_data);
+        }
+        if (cid->dconf.log_to_errlog)
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02985)
+                          "%s: %s", cid->r->filename,
+                          (char*) buf_data);
+        return 1;
+
+    case HSE_REQ_IO_COMPLETION:
+        /* Emulates a completion port...  Record callback address and
+         * user defined arg, we will call this after any async request
+         * (e.g. transmitfile) as if the request executed async.
+         * Per MS docs... HSE_REQ_IO_COMPLETION replaces any prior call
+         * to HSE_REQ_IO_COMPLETION, and buf_data may be set to NULL.
+         */
+        if (cid->dconf.fake_async) {
+            cid->completion = (PFN_HSE_IO_COMPLETION) buf_data;
+            cid->completion_arg = (void *) data_type;
+            return 1;
+        }
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02673)
+                      "ServerSupportFunction HSE_REQ_IO_COMPLETION "
+                      "is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_REQ_TRANSMIT_FILE:
+    {
+        /* we do nothing with (tf->dwFlags & HSE_DISCONNECT_AFTER_SEND)
+         */
+        HSE_TF_INFO *tf = (HSE_TF_INFO*)buf_data;
+        apr_uint32_t sent = 0;
+        apr_ssize_t ate = 0;
+        apr_bucket_brigade *bb;
+        apr_bucket *b;
+        apr_file_t *fd;
+        apr_off_t fsize;
+
+        if (!cid->dconf.fake_async && (tf->dwFlags & HSE_IO_ASYNC)) {
+            if (cid->dconf.log_unsupported)
+                ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02674)
+                         "ServerSupportFunction HSE_REQ_TRANSMIT_FILE "
+                         "as HSE_IO_ASYNC is not supported: %s", r->filename);
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+            return 0;
+        }
+
+        /* Presume the handle was opened with the CORRECT semantics
+         * for TransmitFile
+         */
+        if ((rv = apr_os_file_put(&fd, &tf->hFile,
+                                  APR_READ | APR_XTHREAD, r->pool))
+                != APR_SUCCESS) {
+            return 0;
+        }
+        if (tf->BytesToWrite) {
+            fsize = tf->BytesToWrite;
+        }
+        else {
+            apr_finfo_t fi;
+            if (apr_file_info_get(&fi, APR_FINFO_SIZE, fd) != APR_SUCCESS) {
+                apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+                return 0;
+            }
+            fsize = fi.size - tf->Offset;
+        }
+
+        /* apr_dupfile_oshandle (&fd, tf->hFile, r->pool); */
+        bb = apr_brigade_create(r->pool, c->bucket_alloc);
+
+        /* According to MS: if calling HSE_REQ_TRANSMIT_FILE with the
+         * HSE_IO_SEND_HEADERS flag, then you can't otherwise call any
+         * HSE_SEND_RESPONSE_HEADERS* fn, but if you don't use the flag,
+         * you must have done so.  They document that the pHead headers
+         * option is valid only for HSE_IO_SEND_HEADERS - we are a bit
+         * more flexible and assume with the flag, pHead are the
+         * response headers, and without, pHead simply contains text
+         * (handled after this case).
+         */
+        if ((tf->dwFlags & HSE_IO_SEND_HEADERS) && tf->pszStatusCode) {
+            ate = send_response_header(cid, tf->pszStatusCode,
+                                            (char*)tf->pHead,
+                                            strlen(tf->pszStatusCode),
+                                            tf->HeadLength);
+        }
+        else if (!cid->headers_set && tf->pHead && tf->HeadLength
+                                   && *(char*)tf->pHead) {
+            ate = send_response_header(cid, NULL, (char*)tf->pHead,
+                                            0, tf->HeadLength);
+            if (ate < 0)
+            {
+                apr_brigade_destroy(bb);
+                apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+                return 0;
+            }
+        }
+
+        if (tf->pHead && (apr_size_t)ate < tf->HeadLength) {
+            b = apr_bucket_transient_create((char*)tf->pHead + ate,
+                                            tf->HeadLength - ate,
+                                            c->bucket_alloc);
+            APR_BRIGADE_INSERT_TAIL(bb, b);
+            sent = tf->HeadLength;
+        }
+
+        sent += (apr_uint32_t)fsize;
+        apr_brigade_insert_file(bb, fd, tf->Offset, fsize, r->pool);
+
+        if (tf->pTail && tf->TailLength) {
+            sent += tf->TailLength;
+            b = apr_bucket_transient_create((char*)tf->pTail,
+                                            tf->TailLength, c->bucket_alloc);
+            APR_BRIGADE_INSERT_TAIL(bb, b);
+        }
+
+        b = apr_bucket_flush_create(c->bucket_alloc);
+        APR_BRIGADE_INSERT_TAIL(bb, b);
+        rv = ap_pass_brigade(r->output_filters, bb);
+        cid->response_sent = 1;
+        if (rv != APR_SUCCESS)
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, APLOGNO(03178)
+                          "ServerSupportFunction "
+                          "HSE_REQ_TRANSMIT_FILE "
+                          "ap_pass_brigade failed: %s", r->filename);
+
+        /* Use tf->pfnHseIO + tf->pContext, or if NULL, then use cid->fnIOComplete
+         * pass pContect to the HseIO callback.
+         */
+        if (tf->dwFlags & HSE_IO_ASYNC) {
+            if (tf->pfnHseIO) {
+                if (rv == APR_SUCCESS) {
+                    tf->pfnHseIO(cid->ecb, tf->pContext,
+                                 ERROR_SUCCESS, sent);
+                }
+                else {
+                    tf->pfnHseIO(cid->ecb, tf->pContext,
+                                 ERROR_WRITE_FAULT, sent);
+                }
+            }
+            else if (cid->completion) {
+                if (rv == APR_SUCCESS) {
+                    cid->completion(cid->ecb, cid->completion_arg,
+                                    sent, ERROR_SUCCESS);
+                }
+                else {
+                    cid->completion(cid->ecb, cid->completion_arg,
+                                    sent, ERROR_WRITE_FAULT);
+                }
+            }
+        }
+        return (rv == APR_SUCCESS);
+    }
+
+    case HSE_REQ_REFRESH_ISAPI_ACL:
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02675)
+                          "ServerSupportFunction "
+                          "HSE_REQ_REFRESH_ISAPI_ACL "
+                          "is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_REQ_IS_KEEP_CONN:
+        *((int *)buf_data) = (r->connection->keepalive == AP_CONN_KEEPALIVE);
+        return 1;
+
+    case HSE_REQ_ASYNC_READ_CLIENT:
+    {
+        apr_uint32_t read = 0;
+        int res = 0;
+        if (!cid->dconf.fake_async) {
+            if (cid->dconf.log_unsupported)
+                ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02986)
+                              "asynchronous I/O not supported: %s",
+                              r->filename);
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+            return 0;
+        }
+
+        if (r->remaining < *buf_size) {
+            *buf_size = (apr_size_t)r->remaining;
+        }
+
+        while (read < *buf_size &&
+            ((res = ap_get_client_block(r, (char*)buf_data + read,
+                                        *buf_size - read)) > 0)) {
+            read += res;
+        }
+
+        if ((*data_type & HSE_IO_ASYNC) && cid->completion) {
+            /* XXX: Many authors issue their next HSE_REQ_ASYNC_READ_CLIENT
+             * within the completion logic.  An example is MS's own PSDK
+             * sample web/iis/extensions/io/ASyncRead.  This potentially
+             * leads to stack exhaustion.  To refactor, the notification
+             * logic needs to move to isapi_handler() - differentiating
+             * the cid->completed event with a new flag to indicate
+             * an async-notice versus the async request completed.
+             */
+            if (res >= 0) {
+                cid->completion(cid->ecb, cid->completion_arg,
+                                read, ERROR_SUCCESS);
+            }
+            else {
+                cid->completion(cid->ecb, cid->completion_arg,
+                                read, ERROR_READ_FAULT);
+            }
+        }
+        return (res >= 0);
+    }
+
+    case HSE_REQ_GET_IMPERSONATION_TOKEN:  /* Added in ISAPI 4.0 */
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02676)
+                          "ServerSupportFunction "
+                          "HSE_REQ_GET_IMPERSONATION_TOKEN "
+                          "is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_REQ_MAP_URL_TO_PATH_EX:
+    {
+        /* Map a URL to a filename */
+        HSE_URL_MAPEX_INFO *info = (HSE_URL_MAPEX_INFO*)data_type;
+        char* test_uri = apr_pstrndup(r->pool, (char *)buf_data, *buf_size);
+
+        subreq = ap_sub_req_lookup_uri(test_uri, r, NULL);
+        info->cchMatchingURL = strlen(test_uri);
+        info->cchMatchingPath = apr_cpystrn(info->lpszPath, subreq->filename,
+                                      sizeof(info->lpszPath)) - info->lpszPath;
+
+        /* Mapping started with assuming both strings matched.
+         * Now roll on the path_info as a mismatch and handle
+         * terminating slashes for directory matches.
+         */
+        if (subreq->path_info && *subreq->path_info) {
+            apr_cpystrn(info->lpszPath + info->cchMatchingPath,
+                        subreq->path_info,
+                        sizeof(info->lpszPath) - info->cchMatchingPath);
+            info->cchMatchingURL -= strlen(subreq->path_info);
+            if (subreq->finfo.filetype == APR_DIR
+                 && info->cchMatchingPath < sizeof(info->lpszPath) - 1) {
+                /* roll forward over path_info's first slash */
+                ++info->cchMatchingPath;
+                ++info->cchMatchingURL;
+            }
+        }
+        else if (subreq->finfo.filetype == APR_DIR
+                 && info->cchMatchingPath < sizeof(info->lpszPath) - 1) {
+            /* Add a trailing slash for directory */
+            info->lpszPath[info->cchMatchingPath++] = '/';
+            info->lpszPath[info->cchMatchingPath] = '\0';
+        }
+
+        /* If the matched isn't a file, roll match back to the prior slash */
+        if (subreq->finfo.filetype == APR_NOFILE) {
+            while (info->cchMatchingPath && info->cchMatchingURL) {
+                if (info->lpszPath[info->cchMatchingPath - 1] == '/')
+                    break;
+                --info->cchMatchingPath;
+                --info->cchMatchingURL;
+            }
+        }
+
+        /* Paths returned with back slashes */
+        for (test_uri = info->lpszPath; *test_uri; ++test_uri)
+            if (*test_uri == '/')
+                *test_uri = '\\';
+
+        /* is a combination of:
+         * HSE_URL_FLAGS_READ         0x001 Allow read
+         * HSE_URL_FLAGS_WRITE        0x002 Allow write
+         * HSE_URL_FLAGS_EXECUTE      0x004 Allow execute
+         * HSE_URL_FLAGS_SSL          0x008 Require SSL
+         * HSE_URL_FLAGS_DONT_CACHE   0x010 Don't cache (VRoot only)
+         * HSE_URL_FLAGS_NEGO_CERT    0x020 Allow client SSL cert
+         * HSE_URL_FLAGS_REQUIRE_CERT 0x040 Require client SSL cert
+         * HSE_URL_FLAGS_MAP_CERT     0x080 Map client SSL cert to account
+         * HSE_URL_FLAGS_SSL128       0x100 Require 128-bit SSL cert
+         * HSE_URL_FLAGS_SCRIPT       0x200 Allow script execution
+         *
+         * XxX: As everywhere, EXEC flags could use some work...
+         *      and this could go further with more flags, as desired.
+         */
+        info->dwFlags = (subreq->finfo.protection & APR_UREAD    ? 0x001 : 0)
+                      | (subreq->finfo.protection & APR_UWRITE   ? 0x002 : 0)
+                      | (subreq->finfo.protection & APR_UEXECUTE ? 0x204 : 0);
+        return 1;
+    }
+
+    case HSE_REQ_ABORTIVE_CLOSE:
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02677)
+                          "ServerSupportFunction HSE_REQ_ABORTIVE_CLOSE"
+                          " is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_REQ_GET_CERT_INFO_EX:  /* Added in ISAPI 4.0 */
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02678)
+                          "ServerSupportFunction "
+                          "HSE_REQ_GET_CERT_INFO_EX "
+                          "is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_REQ_SEND_RESPONSE_HEADER_EX:  /* Added in ISAPI 4.0 */
+    {
+        HSE_SEND_HEADER_EX_INFO *shi = (HSE_SEND_HEADER_EX_INFO*)buf_data;
+
+        /*  Ignore shi->fKeepConn - we don't want the advise
+         */
+        apr_ssize_t ate = send_response_header(cid, shi->pszStatus,
+                                               shi->pszHeader,
+                                               shi->cchStatus,
+                                               shi->cchHeader);
+        if (ate < 0) {
+            apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+            return 0;
+        }
+        else if ((apr_size_t)ate < shi->cchHeader) {
+            apr_bucket_brigade *bb;
+            apr_bucket *b;
+            bb = apr_brigade_create(cid->r->pool, c->bucket_alloc);
+            b = apr_bucket_transient_create(shi->pszHeader + ate,
+                                            shi->cchHeader - ate,
+                                            c->bucket_alloc);
+            APR_BRIGADE_INSERT_TAIL(bb, b);
+            b = apr_bucket_flush_create(c->bucket_alloc);
+            APR_BRIGADE_INSERT_TAIL(bb, b);
+            rv = ap_pass_brigade(cid->r->output_filters, bb);
+            cid->response_sent = 1;
+            if (rv != APR_SUCCESS)
+                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, APLOGNO(03179)
+                              "ServerSupportFunction "
+                              "HSE_REQ_SEND_RESPONSE_HEADER_EX "
+                              "ap_pass_brigade failed: %s", r->filename);
+            return (rv == APR_SUCCESS);
+        }
+        /* Deliberately hold off sending 'just the headers' to begin to
+         * accumulate the body and speed up the overall response, or at
+         * least wait for the end the session.
+         */
+        return 1;
+    }
+
+    case HSE_REQ_CLOSE_CONNECTION:  /* Added after ISAPI 4.0 */
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02679)
+                          "ServerSupportFunction "
+                          "HSE_REQ_CLOSE_CONNECTION "
+                          "is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    case HSE_REQ_IS_CONNECTED:  /* Added after ISAPI 4.0 */
+        /* Returns True if client is connected c.f. MSKB Q188346
+         * assuming the identical return mechanism as HSE_REQ_IS_KEEP_CONN
+         */
+        *((int *)buf_data) = (r->connection->aborted == 0);
+        return 1;
+
+    case HSE_REQ_EXTENSION_TRIGGER:  /* Added after ISAPI 4.0 */
+        /*  Undocumented - defined by the Microsoft Jan '00 Platform SDK
+         */
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02680)
+                          "ServerSupportFunction "
+                          "HSE_REQ_EXTENSION_TRIGGER "
+                          "is not supported: %s", r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+
+    default:
+        if (cid->dconf.log_unsupported)
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02681)
+                          "ServerSupportFunction (%d) not supported: "
+                          "%s", HSE_code, r->filename);
+        apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
+        return 0;
+    }
+}
+
+/**********************************************************
+ *
+ *  ISAPI Module request invocation section
+ *
+ **********************************************************/
+
+static apr_status_t isapi_handler (request_rec *r)
+{
+    isapi_dir_conf *dconf;
+    apr_table_t *e;
+    apr_status_t rv;
+    isapi_loaded *isa;
+    isapi_cid *cid;
+    const char *val;
+    apr_uint32_t read;
+    int res;
+
+    if (strcmp(r->handler, "isapi-isa")
+        && strcmp(r->handler, "isapi-handler")) {
+        /* Hang on to the isapi-isa for compatibility with older docs
+         * (wtf did '-isa' mean in the first place?) but introduce
+         * a newer and clearer "isapi-handler" name.
+         */
+        return DECLINED;
+    }
+    dconf = ap_get_module_config(r->per_dir_config, &isapi_module);
+    e = r->subprocess_env;
+
+    /* Use similar restrictions as CGIs
+     *
+     * If this fails, it's pointless to load the isapi dll.
+     */
+    if (!(ap_allow_options(r) & OPT_EXECCGI)) {
+        return HTTP_FORBIDDEN;
+    }
+    if (r->finfo.filetype == APR_NOFILE) {
+        return HTTP_NOT_FOUND;
+    }
+    if (r->finfo.filetype != APR_REG) {
+        return HTTP_FORBIDDEN;
+    }
+    if ((r->used_path_info == AP_REQ_REJECT_PATH_INFO) &&
+        r->path_info && *r->path_info) {
+        /* default to accept */
+        return HTTP_NOT_FOUND;
+    }
+
+    if (isapi_lookup(r->pool, r->server, r, r->filename, &isa)
+           != APR_SUCCESS) {
+        return HTTP_INTERNAL_SERVER_ERROR;
+    }
+    /* Set up variables */
+    ap_add_common_vars(r);
+    ap_add_cgi_vars(r);
+    apr_table_setn(e, "UNMAPPED_REMOTE_USER", "REMOTE_USER");
+    if ((val = apr_table_get(e, "HTTPS")) && (strcmp(val, "on") == 0))
+        apr_table_setn(e, "SERVER_PORT_SECURE", "1");
+    else
+        apr_table_setn(e, "SERVER_PORT_SECURE", "0");
+    apr_table_setn(e, "URL", r->uri);
+
+    /* Set up connection structure and ecb,
+     * NULL or zero out most fields.
+     */
+    cid = apr_pcalloc(r->pool, sizeof(isapi_cid));
+
+    /* Fixup defaults for dconf */
+    cid->dconf.read_ahead_buflen = (dconf->read_ahead_buflen == ISAPI_UNDEF)
+                                     ? 49152 : dconf->read_ahead_buflen;
+    cid->dconf.log_unsupported   = (dconf->log_unsupported == ISAPI_UNDEF)
+                                     ? 0 : dconf->log_unsupported;
+    cid->dconf.log_to_errlog     = (dconf->log_to_errlog == ISAPI_UNDEF)
+                                     ? 0 : dconf->log_to_errlog;
+    cid->dconf.log_to_query      = (dconf->log_to_query == ISAPI_UNDEF)
+                                     ? 1 : dconf->log_to_query;
+    cid->dconf.fake_async        = (dconf->fake_async == ISAPI_UNDEF)
+                                     ? 0 : dconf->fake_async;
+
+    cid->ecb = apr_pcalloc(r->pool, sizeof(EXTENSION_CONTROL_BLOCK));
+    cid->ecb->ConnID = cid;
+    cid->isa = isa;
+    cid->r = r;
+    r->status = 0;
+
+    cid->ecb->cbSize = sizeof(EXTENSION_CONTROL_BLOCK);
+    cid->ecb->dwVersion = isa->report_version;
+    cid->ecb->dwHttpStatusCode = 0;
+    strcpy(cid->ecb->lpszLogData, "");
+    /* TODO: are copies really needed here?
+     */
+    cid->ecb->lpszMethod = (char*) r->method;
+    cid->ecb->lpszQueryString = (char*) apr_table_get(e, "QUERY_STRING");
+    cid->ecb->lpszPathInfo = (char*) apr_table_get(e, "PATH_INFO");
+    cid->ecb->lpszPathTranslated = (char*) apr_table_get(e, "PATH_TRANSLATED");
+    cid->ecb->lpszContentType = (char*) apr_table_get(e, "CONTENT_TYPE");
+
+    /* Set up the callbacks */
+    cid->ecb->GetServerVariable = regfnGetServerVariable;
+    cid->ecb->WriteClient = regfnWriteClient;
+    cid->ecb->ReadClient = regfnReadClient;
+    cid->ecb->ServerSupportFunction = regfnServerSupportFunction;
+
+    /* Set up client input */
+    res = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR);
+    if (res) {
+        return res;
+    }
+
+    if (ap_should_client_block(r)) {
+        /* Time to start reading the appropriate amount of data,
+         * and allow the administrator to tweak the number
+         */
+        if (r->remaining) {
+            cid->ecb->cbTotalBytes = (apr_size_t)r->remaining;
+            if (cid->ecb->cbTotalBytes > (apr_uint32_t)cid->dconf.read_ahead_buflen)
+                cid->ecb->cbAvailable = cid->dconf.read_ahead_buflen;
+            else
+                cid->ecb->cbAvailable = cid->ecb->cbTotalBytes;
+        }
+        else
+        {
+            cid->ecb->cbTotalBytes = 0xffffffff;
+            cid->ecb->cbAvailable = cid->dconf.read_ahead_buflen;
+        }
+
+        cid->ecb->lpbData = apr_pcalloc(r->pool, cid->ecb->cbAvailable + 1);
+
+        read = 0;
+        while (read < cid->ecb->cbAvailable &&
+               ((res = ap_get_client_block(r, (char*)cid->ecb->lpbData + read,
+                                        cid->ecb->cbAvailable - read)) > 0)) {
+            read += res;
+        }
+
+        if (res < 0) {
+            return HTTP_INTERNAL_SERVER_ERROR;
+        }
+
+        /* Although it's not to spec, IIS seems to null-terminate
+         * its lpdData string. So we will too.
+         */
+        if (res == 0)
+            cid->ecb->cbAvailable = cid->ecb->cbTotalBytes = read;
+        else
+            cid->ecb->cbAvailable = read;
+        cid->ecb->lpbData[read] = '\0';
+    }
+    else {
+        cid->ecb->cbTotalBytes = 0;
+        cid->ecb->cbAvailable = 0;
+        cid->ecb->lpbData = NULL;
+    }
+
+    /* To emulate async behavior...
+     *
+     * We create a cid->completed mutex and lock on it so that the
+     * app can believe is it running async.
+     *
+     * This request completes upon a notification through
+     * ServerSupportFunction(HSE_REQ_DONE_WITH_SESSION), which
+     * unlocks this mutex.  If the HttpExtensionProc() returns
+     * HSE_STATUS_PENDING, we will attempt to gain this lock again
+     * which may *only* happen once HSE_REQ_DONE_WITH_SESSION has
+     * unlocked the mutex.
+     */
+    if (cid->dconf.fake_async) {
+        rv = apr_thread_mutex_create(&cid->completed,
+                                     APR_THREAD_MUTEX_UNNESTED,
+                                     r->pool);
+        if (cid->completed && (rv == APR_SUCCESS)) {
+            rv = apr_thread_mutex_lock(cid->completed);
+        }
+
+        if (!cid->completed || (rv != APR_SUCCESS)) {
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02112)
+                          "Failed to create completion mutex");
+            return HTTP_INTERNAL_SERVER_ERROR;
+        }
+    }
+
+    /* All right... try and run the sucker */
+    rv = (*isa->HttpExtensionProc)(cid->ecb);
+
+    /* Check for a log message - and log it */
+    if (*cid->ecb->lpszLogData) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02113)
+                      "%s: %s", r->filename, cid->ecb->lpszLogData);
+    }
+
+    switch(rv) {
+        case 0:  /* Strange, but MS isapi accepts this as success */
+        case HSE_STATUS_SUCCESS:
+        case HSE_STATUS_SUCCESS_AND_KEEP_CONN:
+            /* Ignore the keepalive stuff; Apache handles it just fine without
+             * the ISAPI Handler's "advice".
+             * Per Microsoft: "In IIS versions 4.0 and later, the return
+             * values HSE_STATUS_SUCCESS and HSE_STATUS_SUCCESS_AND_KEEP_CONN
+             * are functionally identical: Keep-Alive connections are
+             * maintained, if supported by the client."
+             * ... so we were pat all this time
+             */
+            break;
+
+        case HSE_STATUS_PENDING:
+            /* emulating async behavior...
+             */
+            if (cid->completed) {
+                /* The completion port was locked prior to invoking
+                 * HttpExtensionProc().  Once we can regain the lock,
+                 * when ServerSupportFunction(HSE_REQ_DONE_WITH_SESSION)
+                 * is called by the extension to release the lock,
+                 * we may finally destroy the request.
+                 */
+                (void)apr_thread_mutex_lock(cid->completed);
+                break;
+            }
+            else if (cid->dconf.log_unsupported) {
+                 ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02114)
+                               "asynch I/O result HSE_STATUS_PENDING "
+                               "from HttpExtensionProc() is not supported: %s",
+                               r->filename);
+                 r->status = HTTP_INTERNAL_SERVER_ERROR;
+            }
+            break;
+
+        case HSE_STATUS_ERROR:
+            /* end response if we have yet to do so.
+             */
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, apr_get_os_error(), r, APLOGNO(02115)
+                          "HSE_STATUS_ERROR result from "
+                          "HttpExtensionProc(): %s", r->filename);
+            r->status = HTTP_INTERNAL_SERVER_ERROR;
+            break;
+
+        default:
+            ap_log_rerror(APLOG_MARK, APLOG_WARNING, apr_get_os_error(), r, APLOGNO(02116)
+                          "unrecognized result code %d "
+                          "from HttpExtensionProc(): %s ",
+                          rv, r->filename);
+            r->status = HTTP_INTERNAL_SERVER_ERROR;
+            break;
+    }
+
+    /* Flush the response now, including headers-only responses */
+    if (cid->headers_set || cid->response_sent) {
+        conn_rec *c = r->connection;
+        apr_bucket_brigade *bb;
+        apr_bucket *b;
+        apr_status_t rv;
+
+        bb = apr_brigade_create(r->pool, c->bucket_alloc);
+        b = apr_bucket_eos_create(c->bucket_alloc);
+        APR_BRIGADE_INSERT_TAIL(bb, b);
+        rv = ap_pass_brigade(r->output_filters, bb);
+        cid->response_sent = 1;
+
+        if (rv != APR_SUCCESS) {
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, APLOGNO(02117)
+                          "ap_pass_brigade failed to "
+                          "complete the response: %s ", r->filename);
+        }
+
+        return OK; /* NOT r->status, even if it has changed. */
+    }
+
+    /* As the client returned no error, and if we did not error out
+     * ourselves, trust dwHttpStatusCode to say something relevant.
+     */
+    if (!ap_is_HTTP_SERVER_ERROR(r->status) && cid->ecb->dwHttpStatusCode) {
+        r->status = cid->ecb->dwHttpStatusCode;
+    }
+
+    /* For all missing-response situations simply return the status,
+     * and let the core respond to the client.
+     */
+    return r->status;
+}
+
+/**********************************************************
+ *
+ *  ISAPI Module Setup Hooks
+ *
+ **********************************************************/
+
+static int isapi_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+    apr_status_t rv;
+
+    apr_pool_create_ex(&loaded.pool, pconf, NULL, NULL);
+    if (!loaded.pool) {
+        ap_log_error(APLOG_MARK, APLOG_ERR, APR_EGENERAL, NULL, APLOGNO(02118)
+                     "could not create the isapi cache pool");
+        return APR_EGENERAL;
+    }
+    apr_pool_tag(loaded.pool, "mod_isapi_load");
+
+    loaded.hash = apr_hash_make(loaded.pool);
+    if (!loaded.hash) {
+        ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, APLOGNO(02119)
+                     "Failed to create module cache");
+        return APR_EGENERAL;
+    }
+
+    rv = apr_thread_mutex_create(&loaded.lock, APR_THREAD_MUTEX_DEFAULT,
+                                 loaded.pool);
+    if (rv != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, APLOGNO(02682)
+                     "Failed to create module cache lock");
+        return rv;
+    }
+    return OK;
+}
+
+static void isapi_hooks(apr_pool_t *cont)
+{
+    ap_hook_pre_config(isapi_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
+    ap_hook_handler(isapi_handler, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+AP_DECLARE_MODULE(isapi) = {
+   STANDARD20_MODULE_STUFF,
+   create_isapi_dir_config,     /* create per-dir config */
+   merge_isapi_dir_configs,     /* merge per-dir config */
+   NULL,                        /* server config */
+   NULL,                        /* merge server config */
+   isapi_cmds,                  /* command apr_table_t */
+   isapi_hooks                  /* register hooks */
+};
diff --git a/modules/arch/win32/mod_isapi.dep b/modules/arch/win32/mod_isapi.dep
new file mode 100644
index 0000000..b36dbcf
--- /dev/null
+++ b/modules/arch/win32/mod_isapi.dep
@@ -0,0 +1,61 @@
+# Microsoft Developer Studio Generated Dependency File, included by mod_isapi.mak
+
+..\..\..\build\win32\httpd.rc : \
+	"..\..\..\include\ap_release.h"\
+	
+
+.\mod_isapi.c : \
+	"..\..\..\include\ap_config.h"\
+	"..\..\..\include\ap_config_layout.h"\
+	"..\..\..\include\ap_expr.h"\
+	"..\..\..\include\ap_hooks.h"\
+	"..\..\..\include\ap_mmn.h"\
+	"..\..\..\include\ap_regex.h"\
+	"..\..\..\include\ap_release.h"\
+	"..\..\..\include\apache_noprobes.h"\
+	"..\..\..\include\http_config.h"\
+	"..\..\..\include\http_core.h"\
+	"..\..\..\include\http_log.h"\
+	"..\..\..\include\http_protocol.h"\
+	"..\..\..\include\http_request.h"\
+	"..\..\..\include\httpd.h"\
+	"..\..\..\include\mod_core.h"\
+	"..\..\..\include\os.h"\
+	"..\..\..\include\util_cfgtree.h"\
+	"..\..\..\include\util_filter.h"\
+	"..\..\..\include\util_script.h"\
+	"..\..\..\srclib\apr-util\include\apr_buckets.h"\
+	"..\..\..\srclib\apr-util\include\apr_hooks.h"\
+	"..\..\..\srclib\apr-util\include\apr_optional.h"\
+	"..\..\..\srclib\apr-util\include\apr_optional_hooks.h"\
+	"..\..\..\srclib\apr-util\include\apr_uri.h"\
+	"..\..\..\srclib\apr-util\include\apu.h"\
+	"..\..\..\srclib\apr\include\apr.h"\
+	"..\..\..\srclib\apr\include\apr_allocator.h"\
+	"..\..\..\srclib\apr\include\apr_dso.h"\
+	"..\..\..\srclib\apr\include\apr_errno.h"\
+	"..\..\..\srclib\apr\include\apr_file_info.h"\
+	"..\..\..\srclib\apr\include\apr_file_io.h"\
+	"..\..\..\srclib\apr\include\apr_general.h"\
+	"..\..\..\srclib\apr\include\apr_global_mutex.h"\
+	"..\..\..\srclib\apr\include\apr_hash.h"\
+	"..\..\..\srclib\apr\include\apr_inherit.h"\
+	"..\..\..\srclib\apr\include\apr_lib.h"\
+	"..\..\..\srclib\apr\include\apr_mmap.h"\
+	"..\..\..\srclib\apr\include\apr_network_io.h"\
+	"..\..\..\srclib\apr\include\apr_poll.h"\
+	"..\..\..\srclib\apr\include\apr_pools.h"\
+	"..\..\..\srclib\apr\include\apr_portable.h"\
+	"..\..\..\srclib\apr\include\apr_proc_mutex.h"\
+	"..\..\..\srclib\apr\include\apr_ring.h"\
+	"..\..\..\srclib\apr\include\apr_shm.h"\
+	"..\..\..\srclib\apr\include\apr_strings.h"\
+	"..\..\..\srclib\apr\include\apr_tables.h"\
+	"..\..\..\srclib\apr\include\apr_thread_mutex.h"\
+	"..\..\..\srclib\apr\include\apr_thread_proc.h"\
+	"..\..\..\srclib\apr\include\apr_thread_rwlock.h"\
+	"..\..\..\srclib\apr\include\apr_time.h"\
+	"..\..\..\srclib\apr\include\apr_user.h"\
+	"..\..\..\srclib\apr\include\apr_want.h"\
+	".\mod_isapi.h"\
+	
diff --git a/modules/arch/win32/mod_isapi.dsp b/modules/arch/win32/mod_isapi.dsp
new file mode 100644
index 0000000..39df3e4
--- /dev/null
+++ b/modules/arch/win32/mod_isapi.dsp
@@ -0,0 +1,115 @@
+# Microsoft Developer Studio Project File - Name="mod_isapi" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102
+
+CFG=mod_isapi - Win32 Release
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_isapi.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_isapi.mak" CFG="mod_isapi - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "mod_isapi - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "mod_isapi - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+CPP=cl.exe
+MTL=midl.exe
+RSC=rc.exe
+
+!IF  "$(CFG)" == "mod_isapi - Win32 Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "Release"
+# PROP BASE Intermediate_Dir "Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Release"
+# PROP Intermediate_Dir "Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /FD /c
+# ADD CPP /nologo /MD /W3 /O2 /Oy- /Zi /I "../../../include" /I "../../../srclib/apr/include" /I "../../../srclib/apr-util/include" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /Fd"Release\mod_isapi_src" /FD /c
+# ADD BASE MTL /nologo /D "NDEBUG" /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /fo"Release/mod_isapi.res" /i "../../../include" /i "../../../srclib/apr/include" /d "NDEBUG" /d BIN_NAME="mod_isapi.so" /d LONG_NAME="isapi_module for Apache"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /out:".\Release\mod_isapi.so" /base:@..\..\..\os\win32\BaseAddr.ref,mod_isapi.so
+# ADD LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Release\mod_isapi.so" /base:@..\..\..\os\win32\BaseAddr.ref,mod_isapi.so /opt:ref
+# Begin Special Build Tool
+TargetPath=.\Release\mod_isapi.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+PostBuild_Cmds=if exist $(TargetPath).manifest mt.exe -manifest $(TargetPath).manifest -outputresource:$(TargetPath);2
+# End Special Build Tool
+
+!ELSEIF  "$(CFG)" == "mod_isapi - Win32 Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "Debug"
+# PROP BASE Intermediate_Dir "Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Debug"
+# PROP Intermediate_Dir "Debug"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MDd /W3 /EHsc /Zi /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /FD /c
+# ADD CPP /nologo /MDd /W3 /EHsc /Zi /Od /I "../../../include" /I "../../../srclib/apr/include" /I "../../../srclib/apr-util/include" /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /Fd"Debug\mod_isapi_src" /FD /c
+# ADD BASE MTL /nologo /D "_DEBUG" /win32
+# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /fo"Debug/mod_isapi.res" /i "../../../include" /i "../../../srclib/apr/include" /d "_DEBUG" /d BIN_NAME="mod_isapi.so" /d LONG_NAME="isapi_module for Apache"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Debug\mod_isapi.so" /base:@..\..\..\os\win32\BaseAddr.ref,mod_isapi.so
+# ADD LINK32 kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /debug /out:".\Debug\mod_isapi.so" /base:@..\..\..\os\win32\BaseAddr.ref,mod_isapi.so
+# Begin Special Build Tool
+TargetPath=.\Debug\mod_isapi.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+PostBuild_Cmds=if exist $(TargetPath).manifest mt.exe -manifest $(TargetPath).manifest -outputresource:$(TargetPath);2
+# End Special Build Tool
+
+!ENDIF 
+
+# Begin Target
+
+# Name "mod_isapi - Win32 Release"
+# Name "mod_isapi - Win32 Debug"
+# Begin Source File
+
+SOURCE=.\mod_isapi.c
+# End Source File
+# Begin Source File
+
+SOURCE=.\mod_isapi.h
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\..\build\win32\httpd.rc
+# End Source File
+# End Target
+# End Project
diff --git a/modules/arch/win32/mod_isapi.h b/modules/arch/win32/mod_isapi.h
new file mode 100644
index 0000000..5284386
--- /dev/null
+++ b/modules/arch/win32/mod_isapi.h
@@ -0,0 +1,271 @@
+/* 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.
+ */
+
+/**
+ * @file mod_isapi.h
+ * @brief ISAPI module extension to Apache
+ *
+ * @defgroup MOD_ISAPI mod_isapi
+ * @ingroup  APACHE_MODS
+ * @{
+ */
+
+#ifndef MOD_ISAPI_H
+#define MOD_ISAPI_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* The Version Information storage passed to a module on startup
+ * via the GetExtensionVersion() entry point.
+ */
+typedef struct HSE_VERSION_INFO {
+    apr_uint32_t dwExtensionVersion;
+    char         lpszExtensionDesc[256];
+} HSE_VERSION_INFO;
+
+/* The startup entry point that must be exported by every ISAPI handler
+ */
+int APR_THREAD_FUNC GetExtensionVersion(HSE_VERSION_INFO *ver_info);
+typedef int (APR_THREAD_FUNC *PFN_GETEXTENSIONVERSION)(HSE_VERSION_INFO *ver_info);
+
+/* Our internal 'HCONN' representation, always opaque to the user.
+ */
+typedef struct isapi_cid isapi_cid;
+typedef struct isapi_cid *HCONN;
+
+/* Prototypes of the essential functions exposed by mod_isapi
+ * for the module to communicate with Apache.
+ */
+typedef int (APR_THREAD_FUNC
+                *PFN_GETSERVERVARIABLE)(HCONN         cid,
+                                        char         *variable_name,
+                                        void         *buf_data,
+                                        apr_uint32_t *buf_size);
+typedef int (APR_THREAD_FUNC
+                *PFN_WRITECLIENT)(HCONN         cid,
+                                  void         *buf_data,
+                                  apr_uint32_t *buf_size,
+                                  apr_uint32_t  flags);
+typedef int (APR_THREAD_FUNC
+                *PFN_READCLIENT)(HCONN         cid,
+                                 void         *buf_data,
+                                 apr_uint32_t *buf_size);
+typedef int (APR_THREAD_FUNC
+                *PFN_SERVERSUPPORTFUNCTION)(HCONN         cid,
+                                            apr_uint32_t  HSE_code,
+                                            void         *buf_data,
+                                            apr_uint32_t *buf_size,
+                                            apr_uint32_t *flags);
+
+/* The ecb structure is passed on each invocation of the module
+ */
+typedef struct EXTENSION_CONTROL_BLOCK {
+    apr_uint32_t   cbSize;
+    apr_uint32_t   dwVersion;
+    HCONN          ConnID;
+    apr_uint32_t   dwHttpStatusCode;
+    char           lpszLogData[80];
+    char          *lpszMethod;
+    char          *lpszQueryString;
+    char          *lpszPathInfo;
+    char          *lpszPathTranslated;
+    apr_uint32_t   cbTotalBytes;
+    apr_uint32_t   cbAvailable;
+    unsigned char *lpbData;
+    char          *lpszContentType;
+
+    PFN_GETSERVERVARIABLE     GetServerVariable;
+    PFN_WRITECLIENT           WriteClient;
+    PFN_READCLIENT            ReadClient;
+    PFN_SERVERSUPPORTFUNCTION ServerSupportFunction;
+} EXTENSION_CONTROL_BLOCK;
+
+/* Status/Headers structure to pass to HSE_SEND_HEADER_EX,
+ * an MS extension to ServerSupportFunction
+ */
+typedef struct HSE_SEND_HEADER_EX_INFO {
+    const char * pszStatus; /* HTTP status text, such as "200 OK" */
+    const char * pszHeader; /* HTTP header lines text, such as
+                             *   "Content-type: text/plain\r\n"
+                             *   "Content-Language: en\r\n"
+                             * Note that (in spite of cchFoo lengths below)
+                             * NULL characters will interfere in headers.
+                             */
+    apr_uint32_t cchStatus; /* length of pszStatus text */
+    apr_uint32_t cchHeader; /* length of pszHeader text */
+    int          fKeepConn; /* Ignored: used to set keep-alive status,
+                             * but Apache follows the client's negotiated
+                             * HTTP contract to decide.
+                             */
+} HSE_SEND_HEADER_EX_INFO;
+
+/* Our only 'supported' MS extended flag bit for TransmitFile,
+ * HSE_IO_SEND_HEADERS indicates that Status+Headers are present
+ * in the pszStatusCode member of the HSE_TF_INFO structure.
+ */
+#define HSE_IO_SEND_HEADERS 8
+
+/* The remaining flags are MS extended flag bits that bear little
+ * relation to Apache; the rules that the Apache server obeys follow
+ * its own design and HTTP protocol filter rules.
+ *
+ * We do not support async, however, we fake it.  If HSE_IO_SYNC is
+ * not passed, and a completion context was defined, we will invoke the
+ * completion function immediately following the transfer, and then
+ * return to the caller.  If HSE_IO_SYNC is passed, there is no call
+ * necessary to the completion context.
+ */
+#define HSE_IO_SYNC  1
+#define HSE_IO_ASYNC 2
+#define HSE_IO_DISCONNECT_AFTER_SEND 4
+#define HSE_IO_NODELAY 4096
+
+/* The Completion function prototype.  This callback may be fixed with
+ * the HSE_REQ_IO_COMPLETION ServerSupportFunction call, or overridden
+ * for the HSE_REQ_TRANSMIT_FILE call.
+ */
+typedef void (APR_THREAD_FUNC *PFN_HSE_IO_COMPLETION)
+                                  (EXTENSION_CONTROL_BLOCK *ecb,
+                                   void                    *ctxt,
+                                   apr_uint32_t             cbIO,
+                                   apr_uint32_t             dwError);
+
+/* TransmitFile structure to pass to HSE_REQ_TRANSMIT_FILE, an MS extension
+ */
+typedef struct HSE_TF_INFO {
+    PFN_HSE_IO_COMPLETION pfnHseIO;      /* Overrides the default setting of
+                                          * HSE_REQ_IO_COMPLETION if not NULL
+                                          */
+    void                 *pContext;
+    apr_os_file_t         hFile;         /* HANDLE/fd to transmit */
+    const char           *pszStatusCode; /* Ignored if HSE_IO_SEND_HEADERS is
+                                          * not set.  Includes HTTP status text
+                                          * plus header text lines, such as
+                                          *   "200 OK\r\n"
+                                          *   "Content-type: text/plain\r\n"
+                                          */
+    apr_uint32_t          BytesToWrite;  /* 0 is write-all */
+    apr_uint32_t          Offset;        /* File Offset */
+    void                 *pHead;         /* Prefix with *pHead body text */
+    apr_uint32_t          HeadLength;    /* Length of *pHead body text */
+    void                 *pTail;         /* Prefix with *pTail body text */
+    apr_uint32_t          TailLength;    /* Length of *pTail body text */
+    apr_uint32_t          dwFlags;       /* bit flags described above */
+} HSE_TF_INFO;
+
+typedef struct HSE_URL_MAPEX_INFO {
+    char         lpszPath[260];
+    apr_uint32_t dwFlags;
+    apr_uint32_t cchMatchingPath;
+    apr_uint32_t cchMatchingURL;
+    apr_uint32_t dwReserved1;
+    apr_uint32_t dwReserved2;
+} HSE_URL_MAPEX_INFO;
+
+/* Original ISAPI ServerSupportFunction() HSE_code methods */
+#define HSE_REQ_SEND_URL_REDIRECT_RESP   1
+#define HSE_REQ_SEND_URL                 2
+#define HSE_REQ_SEND_RESPONSE_HEADER     3
+#define HSE_REQ_DONE_WITH_SESSION        4
+
+/* MS Extended methods to ISAPI ServerSupportFunction() HSE_code */
+#define HSE_REQ_MAP_URL_TO_PATH          1001 /* Emulated */
+#define HSE_REQ_GET_SSPI_INFO            1002 /* Not Supported */
+#define HSE_APPEND_LOG_PARAMETER         1003 /* Supported */
+#define HSE_REQ_IO_COMPLETION            1005 /* Emulated */
+#define HSE_REQ_TRANSMIT_FILE            1006 /* Async Emulated */
+#define HSE_REQ_REFRESH_ISAPI_ACL        1007 /* Not Supported */
+#define HSE_REQ_IS_KEEP_CONN             1008 /* Supported */
+#define HSE_REQ_ASYNC_READ_CLIENT        1010 /* Emulated */
+/*   Added with ISAPI 4.0 */
+#define HSE_REQ_GET_IMPERSONATION_TOKEN  1011 /* Not Supported */
+#define HSE_REQ_MAP_URL_TO_PATH_EX       1012 /* Emulated */
+#define HSE_REQ_ABORTIVE_CLOSE           1014 /* Ignored */
+/*   Added after ISAPI 4.0 in IIS 5.0 */
+#define HSE_REQ_GET_CERT_INFO_EX         1015 /* Not Supported */
+#define HSE_REQ_SEND_RESPONSE_HEADER_EX  1016 /* Supported (no nulls!) */
+#define HSE_REQ_CLOSE_CONNECTION         1017 /* Ignored */
+#define HSE_REQ_IS_CONNECTED             1018 /* Supported */
+#define HSE_REQ_EXTENSION_TRIGGER        1020 /* Not Supported */
+
+/* The request entry point that must be exported by every ISAPI handler
+ */
+apr_uint32_t APR_THREAD_FUNC HttpExtensionProc(EXTENSION_CONTROL_BLOCK *ecb);
+typedef apr_uint32_t (APR_THREAD_FUNC
+                        *PFN_HTTPEXTENSIONPROC)(EXTENSION_CONTROL_BLOCK *ecb);
+
+/* Allowable return values from HttpExtensionProc (apparently 0 is also
+ * accepted by MS IIS, and we will respect it as Success.)
+ * If the HttpExtensionProc returns HSE_STATUS_PENDING, we will create
+ * a wait mutex and lock on it, until HSE_REQ_DONE_WITH_SESSION is called.
+ */
+#define HSE_STATUS_SUCCESS                1
+#define HSE_STATUS_SUCCESS_AND_KEEP_CONN  2 /* 1 vs 2 Ignored, we choose */
+#define HSE_STATUS_PENDING                3 /* Emulated (thread lock) */
+#define HSE_STATUS_ERROR                  4
+
+/* Anticipated error code for common faults within mod_isapi itself
+ */
+#ifndef ERROR_INSUFFICIENT_BUFFER
+#define ERROR_INSUFFICIENT_BUFFER ENOBUFS
+#endif
+#ifndef ERROR_INVALID_INDEX
+#define ERROR_INVALID_INDEX EINVAL
+#endif
+#ifndef ERROR_INVALID_PARAMETER
+#define ERROR_INVALID_PARAMETER EINVAL
+#endif
+#ifndef ERROR_READ_FAULT
+#define ERROR_READ_FAULT EIO
+#endif
+#ifndef ERROR_WRITE_FAULT
+#define ERROR_WRITE_FAULT EIO
+#endif
+#ifndef ERROR_SUCCESS
+#define ERROR_SUCCESS 0
+#endif
+
+/* Valid flags passed with TerminateExtension()
+ */
+#define HSE_TERM_MUST_UNLOAD      1
+#define HSE_TERM_ADVISORY_UNLOAD  2
+
+/* The shutdown entry point optionally exported by an ISAPI handler, passed
+ * HSE_TERM_MUST_UNLOAD or HSE_TERM_ADVISORY_UNLOAD.  The module may return
+ * if passed HSE_TERM_ADVISORY_UNLOAD, and the module will remain loaded.
+ * If the module returns 1 to HSE_TERM_ADVISORY_UNLOAD it is immediately
+ * unloaded.  If the module is passed HSE_TERM_MUST_UNLOAD, its return value
+ * is ignored.
+ */
+int APR_THREAD_FUNC TerminateExtension(apr_uint32_t flags);
+typedef int (APR_THREAD_FUNC *PFN_TERMINATEEXTENSION)(apr_uint32_t flags);
+
+/* Module may return 0 if passed HSE_TERM_ADVISORY_UNLOAD, and the module
+ * will remain loaded, or 1 if it consents to being unloaded. If the module
+ * is passed HSE_TERM_MUST_UNLOAD, its return value is ignored.
+ */
+#define HSE_TERM_MUST_UNLOAD      1
+#define HSE_TERM_ADVISORY_UNLOAD  2
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* !MOD_ISAPI_H */
+/** @} */
+
diff --git a/modules/arch/win32/mod_isapi.mak b/modules/arch/win32/mod_isapi.mak
new file mode 100644
index 0000000..cee9047
--- /dev/null
+++ b/modules/arch/win32/mod_isapi.mak
@@ -0,0 +1,353 @@
+# Microsoft Developer Studio Generated NMAKE File, Based on mod_isapi.dsp
+!IF "$(CFG)" == ""
+CFG=mod_isapi - Win32 Release
+!MESSAGE No configuration specified. Defaulting to mod_isapi - Win32 Release.
+!ENDIF 
+
+!IF "$(CFG)" != "mod_isapi - Win32 Release" && "$(CFG)" != "mod_isapi - Win32 Debug"
+!MESSAGE Invalid configuration "$(CFG)" specified.
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "mod_isapi.mak" CFG="mod_isapi - Win32 Release"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "mod_isapi - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "mod_isapi - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+!ERROR An invalid configuration is specified.
+!ENDIF 
+
+!IF "$(OS)" == "Windows_NT"
+NULL=
+!ELSE 
+NULL=nul
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_isapi - Win32 Release"
+
+OUTDIR=.\Release
+INTDIR=.\Release
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+# Begin Custom Macros
+OutDir=.\Release
+# End Custom Macros
+
+!IF "$(RECURSE)" == "0" 
+
+ALL : "$(OUTDIR)\mod_isapi.so" "$(DS_POSTBUILD_DEP)"
+
+!ELSE 
+
+ALL : "libhttpd - Win32 Release" "libaprutil - Win32 Release" "libapr - Win32 Release" "$(OUTDIR)\mod_isapi.so" "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+!IF "$(RECURSE)" == "1" 
+CLEAN :"libapr - Win32 ReleaseCLEAN" "libaprutil - Win32 ReleaseCLEAN" "libhttpd - Win32 ReleaseCLEAN" 
+!ELSE 
+CLEAN :
+!ENDIF 
+	-@erase "$(INTDIR)\mod_isapi.obj"
+	-@erase "$(INTDIR)\mod_isapi.res"
+	-@erase "$(INTDIR)\mod_isapi_src.idb"
+	-@erase "$(INTDIR)\mod_isapi_src.pdb"
+	-@erase "$(OUTDIR)\mod_isapi.exp"
+	-@erase "$(OUTDIR)\mod_isapi.lib"
+	-@erase "$(OUTDIR)\mod_isapi.pdb"
+	-@erase "$(OUTDIR)\mod_isapi.so"
+
+"$(OUTDIR)" :
+    if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
+
+CPP=cl.exe
+CPP_PROJ=/nologo /MD /W3 /Zi /O2 /Oy- /I "../../../include" /I "../../../srclib/apr/include" /I "../../../srclib/apr-util/include" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\mod_isapi_src" /FD /c 
+
+.c{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.c{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+MTL=midl.exe
+MTL_PROJ=/nologo /D "NDEBUG" /mktyplib203 /win32 
+RSC=rc.exe
+RSC_PROJ=/l 0x409 /fo"$(INTDIR)\mod_isapi.res" /i "../../../include" /i "../../../srclib/apr/include" /d "NDEBUG" /d BIN_NAME="mod_isapi.so" /d LONG_NAME="isapi_module for Apache" 
+BSC32=bscmake.exe
+BSC32_FLAGS=/nologo /o"$(OUTDIR)\mod_isapi.bsc" 
+BSC32_SBRS= \
+	
+LINK32=link.exe
+LINK32_FLAGS=kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /pdb:"$(OUTDIR)\mod_isapi.pdb" /debug /out:"$(OUTDIR)\mod_isapi.so" /implib:"$(OUTDIR)\mod_isapi.lib" /base:@..\..\..\os\win32\BaseAddr.ref,mod_isapi.so /opt:ref 
+LINK32_OBJS= \
+	"$(INTDIR)\mod_isapi.obj" \
+	"$(INTDIR)\mod_isapi.res" \
+	"..\..\..\srclib\apr\Release\libapr-1.lib" \
+	"..\..\..\srclib\apr-util\Release\libaprutil-1.lib" \
+	"..\..\..\Release\libhttpd.lib"
+
+"$(OUTDIR)\mod_isapi.so" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
+    $(LINK32) @<<
+  $(LINK32_FLAGS) $(LINK32_OBJS)
+<<
+
+TargetPath=.\Release\mod_isapi.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+
+# Begin Custom Macros
+OutDir=.\Release
+# End Custom Macros
+
+"$(DS_POSTBUILD_DEP)" : "$(OUTDIR)\mod_isapi.so"
+   if exist .\Release\mod_isapi.so.manifest mt.exe -manifest .\Release\mod_isapi.so.manifest -outputresource:.\Release\mod_isapi.so;2
+	echo Helper for Post-build step > "$(DS_POSTBUILD_DEP)"
+
+!ELSEIF  "$(CFG)" == "mod_isapi - Win32 Debug"
+
+OUTDIR=.\Debug
+INTDIR=.\Debug
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+# Begin Custom Macros
+OutDir=.\Debug
+# End Custom Macros
+
+!IF "$(RECURSE)" == "0" 
+
+ALL : "$(OUTDIR)\mod_isapi.so" "$(DS_POSTBUILD_DEP)"
+
+!ELSE 
+
+ALL : "libhttpd - Win32 Debug" "libaprutil - Win32 Debug" "libapr - Win32 Debug" "$(OUTDIR)\mod_isapi.so" "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+!IF "$(RECURSE)" == "1" 
+CLEAN :"libapr - Win32 DebugCLEAN" "libaprutil - Win32 DebugCLEAN" "libhttpd - Win32 DebugCLEAN" 
+!ELSE 
+CLEAN :
+!ENDIF 
+	-@erase "$(INTDIR)\mod_isapi.obj"
+	-@erase "$(INTDIR)\mod_isapi.res"
+	-@erase "$(INTDIR)\mod_isapi_src.idb"
+	-@erase "$(INTDIR)\mod_isapi_src.pdb"
+	-@erase "$(OUTDIR)\mod_isapi.exp"
+	-@erase "$(OUTDIR)\mod_isapi.lib"
+	-@erase "$(OUTDIR)\mod_isapi.pdb"
+	-@erase "$(OUTDIR)\mod_isapi.so"
+
+"$(OUTDIR)" :
+    if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
+
+CPP=cl.exe
+CPP_PROJ=/nologo /MDd /W3 /Zi /Od /I "../../../include" /I "../../../srclib/apr/include" /I "../../../srclib/apr-util/include" /D "_DEBUG" /D "WIN32" /D "_WINDOWS" /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\mod_isapi_src" /FD /EHsc /c 
+
+.c{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.obj::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.c{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cpp{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+.cxx{$(INTDIR)}.sbr::
+   $(CPP) @<<
+   $(CPP_PROJ) $< 
+<<
+
+MTL=midl.exe
+MTL_PROJ=/nologo /D "_DEBUG" /mktyplib203 /win32 
+RSC=rc.exe
+RSC_PROJ=/l 0x409 /fo"$(INTDIR)\mod_isapi.res" /i "../../../include" /i "../../../srclib/apr/include" /d "_DEBUG" /d BIN_NAME="mod_isapi.so" /d LONG_NAME="isapi_module for Apache" 
+BSC32=bscmake.exe
+BSC32_FLAGS=/nologo /o"$(OUTDIR)\mod_isapi.bsc" 
+BSC32_SBRS= \
+	
+LINK32=link.exe
+LINK32_FLAGS=kernel32.lib ws2_32.lib mswsock.lib /nologo /subsystem:windows /dll /incremental:no /pdb:"$(OUTDIR)\mod_isapi.pdb" /debug /out:"$(OUTDIR)\mod_isapi.so" /implib:"$(OUTDIR)\mod_isapi.lib" /base:@..\..\..\os\win32\BaseAddr.ref,mod_isapi.so 
+LINK32_OBJS= \
+	"$(INTDIR)\mod_isapi.obj" \
+	"$(INTDIR)\mod_isapi.res" \
+	"..\..\..\srclib\apr\Debug\libapr-1.lib" \
+	"..\..\..\srclib\apr-util\Debug\libaprutil-1.lib" \
+	"..\..\..\Debug\libhttpd.lib"
+
+"$(OUTDIR)\mod_isapi.so" : "$(OUTDIR)" $(DEF_FILE) $(LINK32_OBJS)
+    $(LINK32) @<<
+  $(LINK32_FLAGS) $(LINK32_OBJS)
+<<
+
+TargetPath=.\Debug\mod_isapi.so
+SOURCE="$(InputPath)"
+PostBuild_Desc=Embed .manifest
+DS_POSTBUILD_DEP=$(INTDIR)\postbld.dep
+
+# Begin Custom Macros
+OutDir=.\Debug
+# End Custom Macros
+
+"$(DS_POSTBUILD_DEP)" : "$(OUTDIR)\mod_isapi.so"
+   if exist .\Debug\mod_isapi.so.manifest mt.exe -manifest .\Debug\mod_isapi.so.manifest -outputresource:.\Debug\mod_isapi.so;2
+	echo Helper for Post-build step > "$(DS_POSTBUILD_DEP)"
+
+!ENDIF 
+
+
+!IF "$(NO_EXTERNAL_DEPS)" != "1"
+!IF EXISTS("mod_isapi.dep")
+!INCLUDE "mod_isapi.dep"
+!ELSE 
+!MESSAGE Warning: cannot find "mod_isapi.dep"
+!ENDIF 
+!ENDIF 
+
+
+!IF "$(CFG)" == "mod_isapi - Win32 Release" || "$(CFG)" == "mod_isapi - Win32 Debug"
+
+!IF  "$(CFG)" == "mod_isapi - Win32 Release"
+
+"libapr - Win32 Release" : 
+   cd ".\..\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Release" 
+   cd "..\..\modules\arch\win32"
+
+"libapr - Win32 ReleaseCLEAN" : 
+   cd ".\..\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\..\modules\arch\win32"
+
+!ELSEIF  "$(CFG)" == "mod_isapi - Win32 Debug"
+
+"libapr - Win32 Debug" : 
+   cd ".\..\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Debug" 
+   cd "..\..\modules\arch\win32"
+
+"libapr - Win32 DebugCLEAN" : 
+   cd ".\..\..\..\srclib\apr"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libapr.mak" CFG="libapr - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\..\modules\arch\win32"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_isapi - Win32 Release"
+
+"libaprutil - Win32 Release" : 
+   cd ".\..\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Release" 
+   cd "..\..\modules\arch\win32"
+
+"libaprutil - Win32 ReleaseCLEAN" : 
+   cd ".\..\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Release" RECURSE=1 CLEAN 
+   cd "..\..\modules\arch\win32"
+
+!ELSEIF  "$(CFG)" == "mod_isapi - Win32 Debug"
+
+"libaprutil - Win32 Debug" : 
+   cd ".\..\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Debug" 
+   cd "..\..\modules\arch\win32"
+
+"libaprutil - Win32 DebugCLEAN" : 
+   cd ".\..\..\..\srclib\apr-util"
+   $(MAKE) /$(MAKEFLAGS) /F ".\libaprutil.mak" CFG="libaprutil - Win32 Debug" RECURSE=1 CLEAN 
+   cd "..\..\modules\arch\win32"
+
+!ENDIF 
+
+!IF  "$(CFG)" == "mod_isapi - Win32 Release"
+
+"libhttpd - Win32 Release" : 
+   cd ".\..\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Release" 
+   cd ".\modules\arch\win32"
+
+"libhttpd - Win32 ReleaseCLEAN" : 
+   cd ".\..\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Release" RECURSE=1 CLEAN 
+   cd ".\modules\arch\win32"
+
+!ELSEIF  "$(CFG)" == "mod_isapi - Win32 Debug"
+
+"libhttpd - Win32 Debug" : 
+   cd ".\..\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Debug" 
+   cd ".\modules\arch\win32"
+
+"libhttpd - Win32 DebugCLEAN" : 
+   cd ".\..\..\.."
+   $(MAKE) /$(MAKEFLAGS) /F ".\libhttpd.mak" CFG="libhttpd - Win32 Debug" RECURSE=1 CLEAN 
+   cd ".\modules\arch\win32"
+
+!ENDIF 
+
+SOURCE=..\..\..\build\win32\httpd.rc
+
+!IF  "$(CFG)" == "mod_isapi - Win32 Release"
+
+
+"$(INTDIR)\mod_isapi.res" : $(SOURCE) "$(INTDIR)"
+	$(RSC) /l 0x409 /fo"$(INTDIR)\mod_isapi.res" /i "../../../include" /i "../../../srclib/apr/include" /i "../../../build\win32" /d "NDEBUG" /d BIN_NAME="mod_isapi.so" /d LONG_NAME="isapi_module for Apache" $(SOURCE)
+
+
+!ELSEIF  "$(CFG)" == "mod_isapi - Win32 Debug"
+
+
+"$(INTDIR)\mod_isapi.res" : $(SOURCE) "$(INTDIR)"
+	$(RSC) /l 0x409 /fo"$(INTDIR)\mod_isapi.res" /i "../../../include" /i "../../../srclib/apr/include" /i "../../../build\win32" /d "_DEBUG" /d BIN_NAME="mod_isapi.so" /d LONG_NAME="isapi_module for Apache" $(SOURCE)
+
+
+!ENDIF 
+
+SOURCE=.\mod_isapi.c
+
+"$(INTDIR)\mod_isapi.obj" : $(SOURCE) "$(INTDIR)"
+
+
+
+!ENDIF 
+
diff --git a/modules/arch/win32/mod_win32.c b/modules/arch/win32/mod_win32.c
new file mode 100644
index 0000000..bddc60d
--- /dev/null
+++ b/modules/arch/win32/mod_win32.c
@@ -0,0 +1,563 @@
+/* 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.
+ */
+
+#ifdef WIN32
+
+#include "apr_strings.h"
+#include "apr_portable.h"
+#include "apr_buckets.h"
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_protocol.h"
+#include "http_request.h"
+#include "http_log.h"
+#include "util_script.h"
+#include "mod_core.h"
+#include "mod_cgi.h"
+#include "apr_lib.h"
+#include "ap_regkey.h"
+
+/*
+ * CGI Script stuff for Win32...
+ */
+typedef enum { eFileTypeUNKNOWN, eFileTypeBIN, eFileTypeEXE16, eFileTypeEXE32,
+               eFileTypeSCRIPT } file_type_e;
+typedef enum { INTERPRETER_SOURCE_UNSET, INTERPRETER_SOURCE_REGISTRY_STRICT,
+               INTERPRETER_SOURCE_REGISTRY, INTERPRETER_SOURCE_SHEBANG
+             } interpreter_source_e;
+AP_DECLARE(file_type_e) ap_get_win32_interpreter(const request_rec *,
+                                                 char **interpreter,
+                                                 char **arguments);
+
+module AP_MODULE_DECLARE_DATA win32_module;
+
+typedef struct {
+    /* Where to find interpreter to run scripts */
+    interpreter_source_e script_interpreter_source;
+} win32_dir_conf;
+
+static void *create_win32_dir_config(apr_pool_t *p, char *dir)
+{
+    win32_dir_conf *conf;
+    conf = (win32_dir_conf*)apr_palloc(p, sizeof(win32_dir_conf));
+    conf->script_interpreter_source = INTERPRETER_SOURCE_UNSET;
+    return conf;
+}
+
+static void *merge_win32_dir_configs(apr_pool_t *p, void *basev, void *addv)
+{
+    win32_dir_conf *new;
+    win32_dir_conf *base = (win32_dir_conf *) basev;
+    win32_dir_conf *add = (win32_dir_conf *) addv;
+
+    new = (win32_dir_conf *) apr_pcalloc(p, sizeof(win32_dir_conf));
+    new->script_interpreter_source = (add->script_interpreter_source
+                                           != INTERPRETER_SOURCE_UNSET)
+                                   ? add->script_interpreter_source
+                                   : base->script_interpreter_source;
+    return new;
+}
+
+static const char *set_interpreter_source(cmd_parms *cmd, void *dv,
+                                          char *arg)
+{
+    win32_dir_conf *d = (win32_dir_conf *)dv;
+    if (!strcasecmp(arg, "registry")) {
+        d->script_interpreter_source = INTERPRETER_SOURCE_REGISTRY;
+    }
+    else if (!strcasecmp(arg, "registry-strict")) {
+        d->script_interpreter_source = INTERPRETER_SOURCE_REGISTRY_STRICT;
+    }
+    else if (!strcasecmp(arg, "script")) {
+        d->script_interpreter_source = INTERPRETER_SOURCE_SHEBANG;
+    }
+    else {
+        return apr_pstrcat(cmd->temp_pool, "ScriptInterpreterSource \"", arg,
+                           "\" must be \"registry\", \"registry-strict\" or "
+                           "\"script\"", NULL);
+    }
+    return NULL;
+}
+
+/* XXX: prep_string should translate the string into unicode,
+ * such that it is compatible with whatever codepage the client
+ * will read characters 80-ff.  For the moment, use the unicode
+ * values 0080-00ff.  This isn't trivial, since the code page
+ * varies between msdos and Windows applications.
+ * For subsystem 2 [GUI] the default is the system Ansi CP.
+ * For subsystem 3 [CLI] the default is the system OEM CP.
+ */
+static void prep_string(const char ** str, apr_pool_t *p)
+{
+    const char *ch = *str;
+    char *ch2;
+    apr_size_t widen = 0;
+
+    if (!ch) {
+        return;
+    }
+    while (*ch) {
+        if (*(ch++) & 0x80) {
+            ++widen;
+        }
+    }
+    if (!widen) {
+        return;
+    }
+    widen += (ch - *str) + 1;
+    ch = *str;
+    *str = ch2 = apr_palloc(p, widen);
+    while (*ch) {
+        if (*ch & 0x80) {
+            /* sign extension won't hurt us here */
+            *(ch2++) = 0xC0 | ((*ch >> 6) & 0x03);
+            *(ch2++) = 0x80 | (*(ch++) & 0x3f);
+        }
+        else {
+            *(ch2++) = *(ch++);
+        }
+    }
+    *(ch2++) = '\0';
+}
+
+/* Somewhat more exciting ... figure out where the registry has stashed the
+ * ExecCGI or Open command - it may be nested one level deep (or more???)
+ */
+static char* get_interpreter_from_win32_registry(apr_pool_t *p,
+                                                 const char* ext,
+                                                 int strict)
+{
+    apr_status_t rv;
+    ap_regkey_t *name_key = NULL;
+    ap_regkey_t *type_key;
+    ap_regkey_t *key;
+    char execcgi_path[] = "SHELL\\EXECCGI\\COMMAND";
+    char execopen_path[] = "SHELL\\OPEN\\COMMAND";
+    char *type_name;
+    char *buffer;
+
+    if (!ext) {
+        return NULL;
+    }
+    /*
+     * Future optimization:
+     * When the registry is successfully searched, store the strings for
+     * interpreter and arguments in an ext hash to speed up subsequent look-ups
+     */
+
+    /* Open the key associated with the script filetype extension */
+    rv = ap_regkey_open(&type_key, AP_REGKEY_CLASSES_ROOT, ext, APR_READ, p);
+
+    if (rv != APR_SUCCESS) {
+        return NULL;
+    }
+
+    /* Retrieve the name of the script filetype extension */
+    rv = ap_regkey_value_get(&type_name, type_key, "", p);
+
+    if (rv == APR_SUCCESS && type_name[0]) {
+        /* Open the key associated with the script filetype extension */
+        rv = ap_regkey_open(&name_key, AP_REGKEY_CLASSES_ROOT, type_name,
+                            APR_READ, p);
+    }
+
+    /* Open the key for the script command path by:
+     *
+     *   1) the 'named' filetype key for ExecCGI/Command
+     *   2) the extension's type key for ExecCGI/Command
+     *
+     * and if the strict arg is false, then continue trying:
+     *
+     *   3) the 'named' filetype key for Open/Command
+     *   4) the extension's type key for Open/Command
+     */
+
+    if (name_key) {
+        if ((rv = ap_regkey_open(&key, name_key, execcgi_path, APR_READ, p))
+                == APR_SUCCESS) {
+            rv = ap_regkey_value_get(&buffer, key, "", p);
+            ap_regkey_close(name_key);
+        }
+    }
+
+    if (!name_key || (rv != APR_SUCCESS)) {
+        if ((rv = ap_regkey_open(&key, type_key, execcgi_path, APR_READ, p))
+                == APR_SUCCESS) {
+            rv = ap_regkey_value_get(&buffer, key, "", p);
+            ap_regkey_close(type_key);
+        }
+    }
+
+    if (!strict && name_key && (rv != APR_SUCCESS)) {
+        if ((rv = ap_regkey_open(&key, name_key, execopen_path, APR_READ, p))
+                == APR_SUCCESS) {
+            rv = ap_regkey_value_get(&buffer, key, "", p);
+            ap_regkey_close(name_key);
+        }
+    }
+
+    if (!strict && (rv != APR_SUCCESS)) {
+        if ((rv = ap_regkey_open(&key, type_key, execopen_path, APR_READ, p))
+                == APR_SUCCESS) {
+            rv = ap_regkey_value_get(&buffer, key, "", p);
+            ap_regkey_close(type_key);
+        }
+    }
+
+    if (name_key) {
+        ap_regkey_close(name_key);
+    }
+
+    ap_regkey_close(type_key);
+
+    if (rv != APR_SUCCESS || !buffer[0]) {
+        return NULL;
+    }
+
+    return buffer;
+}
+
+
+static apr_array_header_t *split_argv(apr_pool_t *p, const char *interp,
+                                      const char *cgiprg, const char *cgiargs)
+{
+    apr_array_header_t *args = apr_array_make(p, 8, sizeof(char*));
+    char *d = apr_palloc(p, strlen(interp)+1);
+    const char *ch = interp;
+    const char **arg;
+    int prgtaken = 0;
+    int argtaken = 0;
+    int inquo;
+    int sl;
+
+    while (*ch) {
+        /* Skip on through Deep Space */
+        if (apr_isspace(*ch)) {
+            ++ch; continue;
+        }
+        /* One Arg */
+        if (((*ch == '$') || (*ch == '%')) && (*(ch + 1) == '*')) {
+            const char *cgiarg = cgiargs;
+            argtaken = 1;
+            for (;;) {
+                char *w = ap_getword_nulls(p, &cgiarg, '+');
+                if (!*w) {
+                    break;
+                }
+                ap_unescape_url(w);
+                prep_string((const char**)&w, p);
+                arg = (const char**)apr_array_push(args);
+                *arg = ap_escape_shell_cmd(p, w);
+            }
+            ch += 2;
+            continue;
+        }
+        if (((*ch == '$') || (*ch == '%')) && (*(ch + 1) == '1')) {
+            /* Todo: Make short name!!! */
+            prgtaken = 1;
+            arg = (const char**)apr_array_push(args);
+            if (*ch == '%') {
+                char *repl = apr_pstrdup(p, cgiprg);
+                *arg = repl;
+                while ((repl = strchr(repl, '/'))) {
+                    *repl++ = '\\';
+                }
+            }
+            else {
+                *arg = cgiprg;
+            }
+            ch += 2;
+            continue;
+        }
+        if ((*ch == '\"') && ((*(ch + 1) == '$')
+                              || (*(ch + 1) == '%')) && (*(ch + 2) == '1')
+            && (*(ch + 3) == '\"')) {
+            prgtaken = 1;
+            arg = (const char**)apr_array_push(args);
+            if (*(ch + 1) == '%') {
+                char *repl = apr_pstrdup(p, cgiprg);
+                *arg = repl;
+                while ((repl = strchr(repl, '/'))) {
+                    *repl++ = '\\';
+                }
+            }
+            else {
+                *arg = cgiprg;
+            }
+            ch += 4;
+            continue;
+        }
+        arg = (const char**)apr_array_push(args);
+        *arg = d;
+        inquo = 0;
+        while (*ch) {
+            if (apr_isspace(*ch) && !inquo) {
+                ++ch; break;
+            }
+            /* Get 'em backslashes */
+            for (sl = 0; *ch == '\\'; ++sl) {
+                *d++ = *ch++;
+            }
+            if (sl & 1) {
+                /* last unmatched '\' + '"' sequence is a '"' */
+                if (*ch == '\"') {
+                    *(d - 1) = *ch++;
+                }
+                continue;
+            }
+            if (*ch == '\"') {
+                /* '""' sequence within quotes is a '"' */
+                if (*++ch == '\"' && inquo) {
+                    *d++ = *ch++; continue;
+                }
+                /* Flip quote state */
+                inquo = !inquo;
+                if (apr_isspace(*ch) && !inquo) {
+                    ++ch; break;
+                }
+                /* All other '"'s are Munched */
+                continue;
+            }
+            /* Anything else is, well, something else */
+            *d++ = *ch++;
+        }
+        /* Term that arg, already pushed on args */
+        *d++ = '\0';
+    }
+
+    if (!prgtaken) {
+        arg = (const char**)apr_array_push(args);
+        *arg = cgiprg;
+    }
+
+    if (!argtaken) {
+        const char *cgiarg = cgiargs;
+        for (;;) {
+            char *w = ap_getword_nulls(p, &cgiarg, '+');
+            if (!*w) {
+                break;
+            }
+            ap_unescape_url(w);
+            prep_string((const char**)&w, p);
+            arg = (const char**)apr_array_push(args);
+            *arg = ap_escape_shell_cmd(p, w);
+        }
+    }
+
+    arg = (const char**)apr_array_push(args);
+    *arg = NULL;
+
+    return args;
+}
+
+
+static apr_status_t ap_cgi_build_command(const char **cmd, const char ***argv,
+                                         request_rec *r, apr_pool_t *p,
+                                         cgi_exec_info_t *e_info)
+{
+    const apr_array_header_t *elts_arr = apr_table_elts(r->subprocess_env);
+    const apr_table_entry_t *elts = (apr_table_entry_t *) elts_arr->elts;
+    const char *ext = NULL;
+    const char *interpreter = NULL;
+    win32_dir_conf *d;
+    apr_file_t *fh;
+    const char *args = "";
+    int i;
+
+    d = (win32_dir_conf *)ap_get_module_config(r->per_dir_config,
+                                               &win32_module);
+
+    if (e_info->cmd_type) {
+        /* We have to consider that the client gets any QUERY_ARGS
+         * without any charset interpretation, use prep_string to
+         * create a string of the literal QUERY_ARGS bytes.
+         */
+        *cmd = r->filename;
+        if (r->args && r->args[0] && !ap_strchr_c(r->args, '=')) {
+            args = r->args;
+        }
+    }
+    /* Handle the complete file name, we DON'T want to follow suexec, since
+     * an unrooted command is as predictable as shooting craps in Win32.
+     * Notice that unlike most mime extension parsing, we have to use the
+     * win32 parsing here, therefore the final extension is the only one
+     * we will consider.
+     */
+    ext = strrchr(apr_filepath_name_get(*cmd), '.');
+
+    /* If the file has an extension and it is not .com and not .exe and
+     * we've been instructed to search the registry, then do so.
+     * Let apr_proc_create do all of the .bat/.cmd dirty work.
+     */
+    if (ext && (!strcasecmp(ext,".exe") || !strcasecmp(ext,".com")
+                || !strcasecmp(ext,".bat") || !strcasecmp(ext,".cmd"))) {
+        interpreter = "";
+    }
+    if (!interpreter && ext
+          && (d->script_interpreter_source
+                     == INTERPRETER_SOURCE_REGISTRY
+           || d->script_interpreter_source
+                     == INTERPRETER_SOURCE_REGISTRY_STRICT)) {
+         /* Check the registry */
+        int strict = (d->script_interpreter_source
+                      == INTERPRETER_SOURCE_REGISTRY_STRICT);
+        interpreter = get_interpreter_from_win32_registry(r->pool, ext,
+                                                          strict);
+        if (interpreter && e_info->cmd_type != APR_SHELLCMD) {
+            e_info->cmd_type = APR_PROGRAM_PATH;
+        }
+        else {
+            ap_log_error(APLOG_MARK, APLOG_INFO, 0, r->server,
+                 strict ? APLOGNO(03180) "No ExecCGI verb found for files of type '%s'."
+                        : APLOGNO(03181) "No ExecCGI or Open verb found for files of type '%s'.",
+                 ext);
+        }
+    }
+    if (!interpreter) {
+        apr_status_t rv;
+        char buffer[1024];
+        apr_size_t bytes = sizeof(buffer);
+        apr_size_t i;
+
+        /* Need to peek into the file figure out what it really is...
+         * ### aught to go back and build a cache for this one of these days.
+         */
+        if ((rv = apr_file_open(&fh, *cmd, APR_READ | APR_BUFFERED,
+                                 APR_OS_DEFAULT, r->pool)) != APR_SUCCESS) {
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02100)
+                          "Failed to open cgi file %s for testing", *cmd);
+            return rv;
+        }
+        if ((rv = apr_file_read(fh, buffer, &bytes)) != APR_SUCCESS) {
+            ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02101)
+                          "Failed to read cgi file %s for testing", *cmd);
+            return rv;
+        }
+        apr_file_close(fh);
+
+        /* Some twisted character [no pun intended] at MS decided that a
+         * zero width joiner as the lead wide character would be ideal for
+         * describing Unicode text files.  This was further convoluted to
+         * another MSism that the same character mapped into utf-8, EF BB BF
+         * would signify utf-8 text files.
+         *
+         * Since MS configuration files are all protecting utf-8 encoded
+         * Unicode path, file and resource names, we already have the correct
+         * WinNT encoding.  But at least eat the stupid three bytes up front.
+         *
+         * ### A more thorough check would also allow UNICODE text in buf, and
+         * convert it to UTF-8 for invoking unicode scripts.  Those are few
+         * and far between, so leave that code an enterprising soul with a need.
+         */
+        if ((bytes >= 3) && memcmp(buffer, "\xEF\xBB\xBF", 3) == 0) {
+            memmove(buffer, buffer + 3, bytes -= 3);
+        }
+
+        /* Script or executable, that is the question...
+         * we check here also for '! so that .vbs scripts can work as CGI.
+         */
+        if ((bytes >= 2) && ((buffer[0] == '#') || (buffer[0] == '\''))
+                         && (buffer[1] == '!')) {
+            /* Assuming file is a script since it starts with a shebang */
+            for (i = 2; i < bytes; i++) {
+                if ((buffer[i] == '\r') || (buffer[i] == '\n')) {
+                    buffer[i] = '\0';
+                    break;
+                }
+            }
+            if (i < bytes) {
+                interpreter = buffer + 2;
+                while (apr_isspace(*interpreter)) {
+                    ++interpreter;
+                }
+                if (e_info->cmd_type != APR_SHELLCMD) {
+                    e_info->cmd_type = APR_PROGRAM_PATH;
+                }
+            }
+        }
+        else if (bytes >= sizeof(IMAGE_DOS_HEADER)) {
+            /* Not a script, is it an executable? */
+            IMAGE_DOS_HEADER *hdr = (IMAGE_DOS_HEADER*)buffer;
+            if (hdr->e_magic == IMAGE_DOS_SIGNATURE) {
+                if (hdr->e_lfarlc < 0x40) {
+                    /* Ought to invoke this 16 bit exe by a stub, (cmd /c?) */
+                    interpreter = "";
+                }
+                else {
+                    interpreter = "";
+                }
+            }
+        }
+    }
+    if (!interpreter) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02102)
+                      "%s is not executable; ensure interpreted scripts have "
+                      "\"#!\" or \"'!\" first line", *cmd);
+        return APR_EBADF;
+    }
+
+    *argv = (const char **)(split_argv(p, interpreter, *cmd,
+                                       args)->elts);
+    *cmd = (*argv)[0];
+
+    e_info->detached = 1;
+
+    /* XXX: Must fix r->subprocess_env to follow utf-8 conventions from
+     * the client's octets so that win32 apr_proc_create is happy.
+     * The -best- way is to determine if the .exe is unicode aware
+     * (using 0x0080-0x00ff) or is linked as a command or windows
+     * application (following the OEM or Ansi code page in effect.)
+     */
+    for (i = 0; i < elts_arr->nelts; ++i) {
+        if (elts[i].key && *elts[i].key && *elts[i].val
+                && !(strncmp(elts[i].key, "REMOTE_", 7) == 0
+                || strcmp(elts[i].key, "GATEWAY_INTERFACE") == 0
+                || strcmp(elts[i].key, "REQUEST_METHOD") == 0
+                || strcmp(elts[i].key, "SERVER_ADDR") == 0
+                || strcmp(elts[i].key, "SERVER_PORT") == 0
+                || strcmp(elts[i].key, "SERVER_PROTOCOL") == 0)) {
+            prep_string((const char**) &elts[i].val, r->pool);
+        }
+    }
+    return APR_SUCCESS;
+}
+
+static void register_hooks(apr_pool_t *p)
+{
+    APR_REGISTER_OPTIONAL_FN(ap_cgi_build_command);
+}
+
+static const command_rec win32_cmds[] = {
+AP_INIT_TAKE1("ScriptInterpreterSource", set_interpreter_source, NULL,
+              OR_FILEINFO,
+              "Where to find interpreter to run Win32 scripts "
+              "(Registry or script shebang line)"),
+{ NULL }
+};
+
+AP_DECLARE_MODULE(win32) = {
+   STANDARD20_MODULE_STUFF,
+   create_win32_dir_config,     /* create per-dir config */
+   merge_win32_dir_configs,     /* merge per-dir config */
+   NULL,                        /* server config */
+   NULL,                        /* merge server config */
+   win32_cmds,                  /* command apr_table_t */
+   register_hooks               /* register hooks */
+};
+
+#endif /* defined WIN32 */