[ON HOLD] Implement pull-based design for content decoding

net/url_request/url_request_http_job.cc

 // Copyright (c) 2012 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/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 212 matching lines @@
 
   DCHECK(!sdch_test_control_ || !sdch_test_activated_);
   if (!is_cached_content_) {
     if (sdch_test_control_)
       RecordPacketStats(FilterContext::SDCH_EXPERIMENT_HOLDBACK);
     if (sdch_test_activated_)
       RecordPacketStats(FilterContext::SDCH_EXPERIMENT_DECODE);
   }
   // Make sure SDCH filters are told to emit histogram data while
   // filter_context_ is still alive.
-  DestroyFilters();
+  // DestroyFilters();
 
   DoneWithRequest(ABORTED);
 }
 
 void URLRequestHttpJob::SetPriority(RequestPriority priority) {
   priority_ = priority;
   if (transaction_)
     transaction_->SetPriority(priority_);
 }
 
@@ skipping 834 matching lines @@
   return GetResponseHeaders()->response_code();
 }
 
 void URLRequestHttpJob::PopulateNetErrorDetails(
     NetErrorDetails* details) const {
   if (!transaction_)
     return;
   return transaction_->PopulateNetErrorDetails(details);
 }
 
-Filter* URLRequestHttpJob::SetupFilter() const {
+scoped_ptr<StreamSource> URLRequestHttpJob::SetupSource() {
   DCHECK(transaction_.get());
   if (!response_info_)
     return NULL;
 
-  std::vector<Filter::FilterType> encoding_types;
   std::string encoding_type;
+  std::vector<std::string> encoding_types;
   HttpResponseHeaders* headers = GetResponseHeaders();
   size_t iter = 0;
   while (headers->EnumerateHeader(&iter, "Content-Encoding", &encoding_type)) {
-    encoding_types.push_back(Filter::ConvertEncodingToType(encoding_type));
+    encoding_types.push_back(base::ToLowerASCII(encoding_type));
   }
 
-  // Even if encoding types are empty, there is a chance that we need to add
-  // some decoding, as some proxies strip encoding completely. In such cases,
-  // we may need to add (for example) SDCH filtering (when the context suggests
-  // it is appropriate).
-  Filter::FixupEncodingTypes(*filter_context_, &encoding_types);
-
-  return !encoding_types.empty()
-      ? Filter::Factory(encoding_types, *filter_context_) : NULL;
+  return StreamSource::BuildSourceChain(URLRequestJob::SetupSource(),
+                                        encoding_types, nullptr);
 }
 
 bool URLRequestHttpJob::CopyFragmentOnRedirect(const GURL& location) const {
   // Allow modification of reference fragments by default, unless
   // |allowed_unsafe_redirect_url_| is set and equal to the redirect URL.
   // When this is the case, we assume that the network delegate has set the
   // desired redirect URL (with or without fragment), so it must not be changed
   // any more.
   return !allowed_unsafe_redirect_url_.is_valid() ||
        allowed_unsafe_redirect_url_ != location;
@@ skipping 403 matching lines @@
   return override_response_headers_.get() ?
              override_response_headers_.get() :
              transaction_->GetResponseInfo()->headers.get();
 }
 
 void URLRequestHttpJob::NotifyURLRequestDestroyed() {
   awaiting_callback_ = false;
 }
 
 }  // namespace net