From 3bf7bb95782a81685d738fc11618f045e3ac1bd9 Mon Sep 17 00:00:00 2001
From: Alex Rousskov <rousskov@measurement-factory.com>
Date: Fri, 30 Jul 2010 14:11:20 -0600
Subject: [PATCH] Bug #2975 fix: chunked requests not supported after regular
 ones

Clean dechunking state to avoid a 501 response to a chunked request
following a non-chunked request on a persistent connection.
---
 src/client_side.cc | 21 +++++++++++++++------
 src/client_side.h  |  1 +
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/src/client_side.cc b/src/client_side.cc
index 87114a5d5a..e7dd33f98d 100644
--- a/src/client_side.cc
+++ b/src/client_side.cc
@@ -2495,7 +2495,8 @@ clientProcessRequest(ConnStateData *conn, HttpParser *hp, ClientSocketContext *c
         request->setContentLength(conn->in.dechunked.contentSize());
         request->header.delById(HDR_TRANSFER_ENCODING);
         conn->finishDechunkingRequest(hp);
-    }
+    } else
+        conn->cleanDechunkingRequest();
 
     unsupportedTe = tePresent && !deChunked;
     if (!urlCheckRequest(request) || unsupportedTe) {
@@ -3754,9 +3755,6 @@ ConnStateData::finishDechunkingRequest(HttpParser *hp)
     debugs(33, 5, HERE << "finish dechunking; content: " << in.dechunked.contentSize());
 
     assert(in.dechunkingState == chunkReady);
-    assert(in.bodyParser);
-    delete in.bodyParser;
-    in.bodyParser = NULL;
 
     const mb_size_t headerSize = HttpParserRequestLen(hp);
 
@@ -3778,8 +3776,19 @@ ConnStateData::finishDechunkingRequest(HttpParser *hp)
 
     in.notYetUsed = end - in.buf;
 
-    in.chunked.clean();
-    in.dechunked.clean();
+    cleanDechunkingRequest();
+}
+
+/// cleanup dechunking state, get ready for the next request
+void
+ConnStateData::cleanDechunkingRequest()
+{
+    if (in.dechunkingState > chunkNone) {
+        delete in.bodyParser;
+        in.bodyParser = NULL;
+        in.chunked.clean();
+        in.dechunked.clean();
+    }
     in.dechunkingState = chunkUnknown;
 }
 
diff --git a/src/client_side.h b/src/client_side.h
index c3b363d5f9..2bf02c52f0 100644
--- a/src/client_side.h
+++ b/src/client_side.h
@@ -269,6 +269,7 @@ public:
     void startDechunkingRequest(HttpParser *hp);
     bool parseRequestChunks(HttpParser *hp);
     void finishDechunkingRequest(HttpParser *hp);
+    void cleanDechunkingRequest();
 
 private:
     int connReadWasError(comm_err_t flag, int size, int xerrno);
-- 
2.47.2