From 30406809246809b28215c8970e6e6c355b8ec7b0 Mon Sep 17 00:00:00 2001
From: Fabian Keil <fk@fabiankeil.de>
Date: Sun, 5 Jul 2009 12:04:46 +0000
Subject: [PATCH] Also react to the client's Keep-Alive header.

---
 parsers.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 53 insertions(+), 2 deletions(-)

diff --git a/parsers.c b/parsers.c
index b95b15c9..27e3db62 100644
--- a/parsers.c
+++ b/parsers.c
@@ -1,4 +1,4 @@
-const char parsers_rcs[] = "$Id: parsers.c,v 1.187 2009/06/30 18:32:04 fabiankeil Exp $";
+const char parsers_rcs[] = "$Id: parsers.c,v 1.188 2009/07/05 12:02:54 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/parsers.c,v $
@@ -156,6 +156,7 @@ static jb_err server_content_disposition(struct client_state *csp, char **header
 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
 static jb_err server_save_content_length(struct client_state *csp, char **header);
 static jb_err server_keep_alive(struct client_state *csp, char **header);
+static jb_err client_keep_alive(struct client_state *csp, char **header);
 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
 
 static jb_err client_host_adder       (struct client_state *csp);
@@ -201,7 +202,9 @@ static const struct parsers client_patterns[] = {
    { "TE:",                       3,   client_te },
    { "Host:",                     5,   client_host },
    { "if-modified-since:",       18,   client_if_modified_since },
-#ifndef FEATURE_CONNECTION_KEEP_ALIVE
+#ifdef FEATURE_CONNECTION_KEEP_ALIVE
+   { "Keep-Alive:",              11,   client_keep_alive },
+#else
    { "Keep-Alive:",              11,   crumble },
 #endif
    { "connection:",              11,   client_connection },
@@ -1666,6 +1669,54 @@ static jb_err server_keep_alive(struct client_state *csp, char **header)
 
    return JB_ERR_OK;
 }
+
+
+/*********************************************************************
+ *
+ * Function    :  client_keep_alive
+ *
+ * Description :  Stores the client's keep alive timeout.
+ *
+ * Parameters  :
+ *          1  :  csp = Current client state (buffers, headers, etc...)
+ *          2  :  header = On input, pointer to header to modify.
+ *                On output, pointer to the modified header, or NULL
+ *                to remove the header.  This function frees the
+ *                original string if necessary.
+ *
+ * Returns     :  JB_ERR_OK.
+ *
+ *********************************************************************/
+static jb_err client_keep_alive(struct client_state *csp, char **header)
+{
+   unsigned int keep_alive_timeout;
+   const char *timeout_position = strstr(*header, ": ");
+
+   if ((NULL == timeout_position)
+    || (1 != sscanf(timeout_position, ": %u", &keep_alive_timeout)))
+   {
+      log_error(LOG_LEVEL_ERROR, "Couldn't parse: %s", *header);
+   }
+   else
+   {
+      if (keep_alive_timeout < csp->config->keep_alive_timeout)
+      {
+         log_error(LOG_LEVEL_HEADER,
+            "Reducing keep-alive timeout from %u to %u.",
+            csp->config->keep_alive_timeout, keep_alive_timeout);
+         csp->server_connection.keep_alive_timeout = keep_alive_timeout;
+      }
+      else
+      {
+         /* XXX: Is this log worthy? */
+         log_error(LOG_LEVEL_HEADER,
+            "Client keep-alive timeout is %u. Sticking with %u.",
+            keep_alive_timeout, csp->server_connection.keep_alive_timeout);
+      }
+   }
+
+   return JB_ERR_OK;
+}
 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
 
 
-- 
2.39.2