| /* |
| * Copyright 2016 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: morlovich@google.com (Maksim Orlovich) |
| // |
| // This implements a filter which generate HTTP2 push or preload fetch hints. |
| // (e.g. Link: <foo>; rel=preload HTTP headers) |
| |
| #ifndef NET_INSTAWEB_REWRITER_PUBLIC_PUSH_PRELOAD_FILTER_H_ |
| #define NET_INSTAWEB_REWRITER_PUBLIC_PUSH_PRELOAD_FILTER_H_ |
| |
| #include "net/instaweb/rewriter/public/common_filter.h" |
| #include "net/instaweb/rewriter/public/rewrite_driver.h" |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/string.h" |
| #include "pagespeed/kernel/html/html_element.h" |
| |
| namespace net_instaweb { |
| |
| class PushPreloadFilter : public CommonFilter { |
| public: |
| explicit PushPreloadFilter(RewriteDriver* rewrite_driver); |
| ~PushPreloadFilter() override; |
| |
| // TODO(morlovich): Proper statistics. |
| // static void InitStats(Statistics* stats); |
| |
| void StartDocumentImpl() override; |
| void StartElementImpl(HtmlElement* element) override {} |
| void EndElementImpl(HtmlElement* element) override {} |
| |
| const char* Name() const override { return "PushPreload"; } |
| |
| void DetermineEnabled(GoogleString* disabled_reason) override; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(PushPreloadFilter); |
| }; |
| |
| } // namespace net_instaweb |
| |
| #endif // NET_INSTAWEB_REWRITER_PUBLIC_PUSH_PRELOAD_FILTER_H_ |