| /** @file |
| |
| Plugin to perform background fetches of certain content that would |
| otherwise not be cached. For example, Range: requests / responses. |
| |
| @section license License |
| |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you 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. |
| */ |
| |
| #pragma once |
| |
| #include <cstdlib> |
| #include <atomic> |
| #include <string> |
| |
| #include "rules.h" |
| |
| // Constants |
| const char PLUGIN_NAME[] = "background_fetch"; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // This holds one complete background fetch rule |
| // |
| class BgFetchConfig |
| { |
| public: |
| explicit BgFetchConfig(TSCont cont) : _cont(cont) { TSContDataSet(cont, static_cast<void *>(this)); } |
| |
| ~BgFetchConfig() |
| { |
| delete _rules; |
| if (_cont) { |
| TSContDestroy(_cont); |
| } |
| } |
| |
| bool parseOptions(int argc, const char *argv[]); |
| |
| BgFetchRule * |
| getRules() const |
| { |
| return _rules; |
| } |
| |
| TSCont |
| getCont() const |
| { |
| return _cont; |
| } |
| |
| const std::string & |
| logFile() const |
| { |
| return _log_file; |
| } |
| |
| bool |
| allow304() const |
| { |
| return _allow_304; |
| } |
| |
| // This parses and populates the BgFetchRule linked list (_rules). |
| bool readConfig(const char *file_name); |
| |
| bool bgFetchAllowed(TSHttpTxn txnp) const; |
| |
| private: |
| TSCont _cont = nullptr; |
| BgFetchRule *_rules = nullptr; |
| bool _allow_304 = false; |
| std::string _log_file; |
| }; |