Added close_on_recycle flags for creatin connections.

This flag enables to distinguish between connection types.
Also added a pool cleanup bound to connection pool that recycles
the connection when client disconnects from server.

Submitted by: mturk


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@104599 13f79535-47bb-0310-9956-ffa450edef68

modules/proxy/mod_proxy.h

@@ -192,6 +192,7 @@ typedef struct {
     apr_socket_t *sock;     /* Connection socket */
     apr_uint32_t flags;     /* Conection flags */
     int          close;     /* Close 'this' connection */
+    int          close_on_recycle; /* Close the connection when returning to pool */
     proxy_worker *worker;   /* Connection pool this connection belogns to */
     void         *data;     /* per scheme connection data */
 } proxy_conn_rec;
@@ -364,7 +365,7 @@ PROXY_DECLARE(int) ap_proxy_acquire_connection(const char *proxy_function, proxy
 PROXY_DECLARE(int) ap_proxy_release_connection(const char *proxy_function, proxy_conn_rec *conn, server_rec *s);
 PROXY_DECLARE(apr_status_t) ap_proxy_close_connection(proxy_conn_rec *conn);
 PROXY_DECLARE(int) ap_proxy_connect_backend(const char *proxy_function, proxy_conn_rec *conn, proxy_worker *worker, server_rec *s);
-PROXY_DECLARE(int) ap_proxy_connection_create(const char *proxy_function, proxy_conn_rec *conn, conn_rec *c, server_rec *s);
+PROXY_DECLARE(int) ap_proxy_connection_create(const char *proxy_function, proxy_conn_rec *conn, int close_on_recycle, conn_rec *c, server_rec *s);
 
 /* For proxy_util */
 extern module PROXY_DECLARE_DATA proxy_module;

modules/proxy/proxy_util.c

@@ -1324,6 +1324,22 @@ static apr_status_t proxy_conn_cleanup(void *theconn)
     return APR_SUCCESS;
 }
 
+static apr_status_t connection_cleanup(void *theconn)
+{
+    proxy_conn_rec *conn = (proxy_conn_rec *)theconn;
+    /* deterimine if the connection need to be closed */
+    if (conn->close_on_recycle) {
+        if (conn->sock)
+            apr_socket_close(conn->sock);
+        conn->sock = NULL;
+
+    }
+    conn->connection = NULL;
+    ap_proxy_release_connection(NULL, conn, NULL);
+    /* Allways return the SUCCESS */
+    return APR_SUCCESS;
+}
+
 /* reslist constructor */
 static apr_status_t connection_constructor(void **resource, void *params,
                                            apr_pool_t *pool)
@@ -1446,6 +1462,17 @@ PROXY_DECLARE(int) ap_proxy_release_connection(const char *proxy_function,
          * for now make a core dump.
          */
     }
+    
+    /* Need to close the connection */
+    if (conn->sock && conn->close) {
+        apr_socket_close(conn->sock);
+        conn->sock = NULL;
+    }
+    conn->close = 0;
+    /* If there is a connection kill it's cleanup */
+    if (conn->connection)
+        apr_pool_cleanup_kill(conn->connection->pool, conn, connection_cleanup);
+
 #if APR_HAS_THREADS
     if (worker->hmax) {
         rv = apr_reslist_release(worker->cp->res, (void *)conn);
@@ -1455,7 +1482,7 @@ PROXY_DECLARE(int) ap_proxy_release_connection(const char *proxy_function,
     {
         worker->cp->conn = conn;
     }
-    if (rv != APR_SUCCESS) {
+    if (rv != APR_SUCCESS && proxy_function) {
         ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
                      "proxy: %s: failed to acquire connection for (%s)",
                      proxy_function, conn->hostname);
@@ -1664,6 +1691,7 @@ PROXY_DECLARE(int) ap_proxy_connect_backend(const char *proxy_function,
 
 PROXY_DECLARE(int) ap_proxy_connection_create(const char *proxy_function,
                                               proxy_conn_rec *conn,
+                                              int close_on_recycle,
                                               conn_rec *c,
                                               server_rec *s)
 {
@@ -1705,6 +1733,7 @@ PROXY_DECLARE(int) ap_proxy_connection_create(const char *proxy_function,
         /* TODO: See if this will break FTP */
         ap_proxy_ssl_disable(conn->connection);
     }
+    conn->close_on_recycle = close_on_recycle;
 
     ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
                  "proxy: %s: connection complete to %pI (%s)",
@@ -1713,5 +1742,11 @@ PROXY_DECLARE(int) ap_proxy_connection_create(const char *proxy_function,
     /* set up the connection filters */
     ap_run_pre_connection(conn->connection, conn->sock);
 
+    /* register the connection cleanup to client connection
+     * so that the connection can be closed or reused
+     */
+    apr_pool_cleanup_register(c->pool, (void *)conn, connection_cleanup,
+                              apr_pool_cleanup_null);      
+
     return OK;
 }