| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| // Author: mmohabey@google.com (Megha Mohabey) |
| |
| #include "net/instaweb/http/public/http_value_writer.h" |
| |
| #include "net/instaweb/http/public/http_cache.h" |
| #include "net/instaweb/http/public/http_value.h" |
| |
| namespace net_instaweb { |
| |
| void HTTPValueWriter::SetHeaders(ResponseHeaders* headers) { |
| if (cache_->IsCacheableContentLength(headers)) { |
| value_->SetHeaders(headers); |
| } else { |
| has_buffered_ = false; |
| value_->Clear(); |
| } |
| } |
| |
| bool HTTPValueWriter::Write(const StringPiece& str, MessageHandler* handler) { |
| if (has_buffered_ && |
| cache_->IsCacheableBodySize(str.size() + value_->contents_size())) { |
| // IsCacheableContentLength is only able to detect if a response is |
| // of cacheable size when the response has content type header. If we |
| // receive the response chunked, then we need to buffer up before |
| // discovering if the response is uncacheable. |
| return value_->Write(str, handler); |
| } |
| has_buffered_ = false; |
| value_->Clear(); |
| return false; |
| } |
| |
| bool HTTPValueWriter::CheckCanCacheElseClear(ResponseHeaders* headers) { |
| if (!cache_->IsCacheableContentLength(headers)) { |
| has_buffered_ = false; |
| value_->Clear(); |
| } |
| return has_buffered_; |
| } |
| |
| bool HTTPValueWriter::CanCacheContent(const StringPiece& str) const { |
| return cache_->IsCacheableBodySize(str.size() + value_->contents_size()); |
| } |
| |
| } // namespace net_instaweb |