Treat ERR_CONNECTION_CLOSED as end-of-data marker for downloads.

net/url_request/url_request_http_job.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/url_request/url_request_http_job.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
@@ skipping 301 matching lines @@
   // notified of the headers completion so that we can update the cookie store.
   if (transaction_->IsReadyToRestartForAuth()) {
     DCHECK(!response_info_->auth_challenge.get());
     RestartTransactionWithAuth(string16(), string16());
     return;
   }
 
   URLRequestJob::NotifyHeadersComplete();
 }
 
-void URLRequestHttpJob::NotifyDone(const URLRequestStatus& status) {
+void URLRequestHttpJob::NotifyDone(const URLRequestStatus& original_status) {
+  URLRequestStatus status(original_status);
+  // Some servers send the body compressed, but specify the content length as
+  // the uncompressed size.  Although this violates the HTTP spec we want to
+  // support it (as IE and FireFox do), but *only* for an exact match.
+  // See http://crbug.com/79694.
+  if (status.os_error() == net::ERR_CONNECTION_CLOSED) {
+    if (request_ && request_->response_headers()) {
+      int64 expected_length = request_->response_headers()->GetContentLength();
+      VLOG(1) << __FUNCTION__ << "() "
+              << "\"" << request_->url().spec() << "\""
+              << " content-length = " << expected_length
+              << " pre total = " << prefilter_bytes_read()
+              << " post total = " << postfilter_bytes_read();
+      if (postfilter_bytes_read() == expected_length) {
+        // Clear the error.
+        status.set_status(URLRequestStatus::SUCCESS);
+        status.set_os_error(0);
+      }
+    }
+  }
+
   RecordCompressionHistograms();
   URLRequestJob::NotifyDone(status);
 }
 
 void URLRequestHttpJob::DestroyTransaction() {
   DCHECK(transaction_.get());
 
   transaction_.reset();
   response_info_ = NULL;
   context_ = NULL;
@@ skipping 1055 matching lines @@
 }
 
 bool URLRequestHttpJob::IsCompressibleContent() const {
   std::string mime_type;
   return GetMimeType(&mime_type) &&
       (IsSupportedJavascriptMimeType(mime_type.c_str()) ||
        IsSupportedNonImageMimeType(mime_type.c_str()));
 }
 
 }  // namespace net