/*
- * $Id$
- *
* This is the other half of the webserver. It handles the task of hooking
* up HTTP requests with the sessions they belong to, using HTTP cookies to
* keep track of things. If the HTTP request doesn't belong to any currently
* active session, a new session is started.
*
+ * Copyright (c) 1996-2010 by the citadel.org team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "webcit.h"
HashList *HttpReqTypes = NULL;
HashList *HttpHeaderHandler = NULL;
extern HashList *HandlerHash;
-int num_threads = 1; /* Number of worker threads. Start at 1 because the parent counts. */
+
+/* the following two values start at 1 because the initial parent thread counts as one. */
+int num_threads_existing = 1; /* Number of worker threads which exist. */
+int num_threads_executing = 1; /* Number of worker threads currently executing. */
void DestroyHttpHeaderHandler(void *V)
{
{
wcsession *sptr, *ss;
wcsession *sessions_to_kill = NULL;
- int num_sessions = 0;
/*
* Lock the session list, moving any candidates for euthanasia into
* a separate list.
*/
pthread_mutex_lock(&SessionListMutex);
- num_sessions = 0;
for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
- ++num_sessions;
/* Kill idle sessions */
if ((time(NULL) - (sptr->lastreq)) > (time_t) WEBCIT_TIMEOUT) {
session_destroy_modules(&sessions_to_kill);
sessions_to_kill = sptr;
- --num_sessions;
}
+}
- /*
- * If there are more sessions than threads, then we should spawn
- * more threads ... up to a predefined maximum.
- */
- while ( (num_sessions > num_threads) && (num_threads <= MAX_WORKER_THREADS) ) {
+/*
+ * Check the size of our thread pool. If all threads are executing, spawn another.
+ */
+void check_thread_pool_size(void)
+{
+ if (time_to_die) return; /* don't expand the thread pool during shutdown */
+
+ begin_critical_section(S_SPAWNER); /* only one of these should run at a time */
+ while (
+ (num_threads_executing >= num_threads_existing)
+ && (num_threads_existing < MAX_WORKER_THREADS)
+ ) {
+ lprintf(3, "%d of %d threads are executing. Adding another worker thread.\n",
+ num_threads_executing,
+ num_threads_existing
+ );
spawn_another_worker_thread();
- lprintf(3, "There are %d sessions and %d threads active.\n",
- num_sessions, num_threads);
}
+ end_critical_section(S_SPAWNER);
}
}
StrBufAppendBuf(Hdr->this_page, Hdr->HR.ReqLine, 0);
+
/* chop Filename / query arguments */
Args = strchr(ChrPtr(Hdr->HR.ReqLine), '?');
if (Args == NULL) /* whe're not that picky about params... TODO: this will spoil '&' in filenames.*/
void Header_HandleHost(StrBuf *Line, ParsedHttpHdrs *hdr)
{
- if ((follow_xff) && (hdr->HR.http_host != NULL))
- return;
- else
- hdr->HR.http_host = Line;
+ if (site_prefix == NULL) {
+ site_prefix = NewStrBuf();
+ StrBufAppendPrintf(site_prefix, "%s://", (is_https ? "https" : "http") );
+ StrBufAppendBuf(site_prefix, Line, 0);
+ }
}
void Header_HandleXFFHost(StrBuf *Line, ParsedHttpHdrs *hdr)
{
- if (follow_xff)
- hdr->HR.http_host = Line;
+ if ( (follow_xff) && (site_prefix == NULL)) {
+ site_prefix = NewStrBuf();
+ StrBufAppendPrintf(site_prefix, "http://"); /* this is naive; do something about it */
+ StrBufAppendBuf(site_prefix, Line, 0);
+ }
}