From 2816902f0e91073887a0f746eae70edb75d9ea43 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 8 Sep 2008 12:15:09 +0000
Subject: Dmitry Kurochkin fixed pipelining over proxy using the multi
 interface

---
 CHANGES       | 11 +++++++++++
 RELEASE-NOTES |  3 ++-
 lib/multi.c   | 13 +++++++------
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/CHANGES b/CHANGES
index eb11cd91e..88ac15470 100644
--- a/CHANGES
+++ b/CHANGES
@@ -7,6 +7,17 @@
                                   Changelog
 
 Daniel Stenberg (8 Sep 2008)
+- Dmitry Kurochkin patched a problem: I have found bug in pipelining through
+  proxy. I have a transparent proxy. When running with http_proxy environment
+  variable not set my test completes fine (it goes through transparent
+  proxy). When I set http_proxy variable my test hangs after the first
+  downloaded is complete. Looks like the second handle never gets out from
+  WAITDO state.
+
+  The fix: It makes checkPendPipeline move 1 handler from pend pipe to send
+  pipe if pipelining is not supported by server but there are no handles in
+  send and recv pipes.
+
 - Stefan Krause pointed out that libcurl would wrongly send away cookies to
   sites in cases where the cookie clearly has a very old expiry date. The
   condition was simply that libcurl's date parser would fail to convert the
diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 3c4885dcb..56b4933dd 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -20,6 +20,7 @@ This release includes the following bugfixes:
  o NetWare LIBC builds are now largefile feature enabled by default
  o curl_easy_pause() could behave wrongly on unpause
  o cookie with invalid expire dates are now considered expired
+ o HTTP pipelining over proxy
 
 This release includes the following known bugs:
 
@@ -33,6 +34,6 @@ This release would not have looked like this without help, code, reports and
 advice from friends like these:
 
  Keith Mok, Yang Tse, Daniel Fandrich, Guenter Knauf, Dmitriy Sergeyev,
- Linus Nielsen Feltzing, Martin Drasar, Stefan Krause
+ Linus Nielsen Feltzing, Martin Drasar, Stefan Krause, Dmitry Kurochkin
 
         Thanks! (and sorry if I forgot to mention someone)
diff --git a/lib/multi.c b/lib/multi.c
index f8602e1d6..70ea38120 100644
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -1988,11 +1988,13 @@ static int checkPendPipeline(struct connectdata *conn)
   int result = 0;
   struct curl_llist_element *sendhead = conn->send_pipe->head;
 
-  if (conn->server_supports_pipelining) {
-    size_t pipeLen = conn->send_pipe->size + conn->recv_pipe->size;
+  size_t pipeLen = conn->send_pipe->size + conn->recv_pipe->size;
+  if (conn->server_supports_pipelining || pipeLen == 0) {
     struct curl_llist_element *curr = conn->pend_pipe->head;
+    const size_t maxPipeLen =
+      conn->server_supports_pipelining ? MAX_PIPELINE_LENGTH : 1;
 
-    while(pipeLen < MAX_PIPELINE_LENGTH && curr) {
+    while(pipeLen < maxPipeLen && curr) {
       Curl_llist_move(conn->pend_pipe, curr,
                       conn->send_pipe, conn->send_pipe->tail);
       Curl_pgrsTime(curr->ptr, TIMER_PRETRANSFER);
@@ -2000,11 +2002,10 @@ static int checkPendPipeline(struct connectdata *conn)
       curr = conn->pend_pipe->head;
       ++pipeLen;
     }
-    if (result > 0)
-      conn->now = Curl_tvnow();
   }
 
-  if(result) {
+  if (result) {
+    conn->now = Curl_tvnow();
     /* something moved, check for a new send pipeline leader */
     if(sendhead != conn->send_pipe->head) {
       /* this is a new one as head, expire it */
-- 
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