http_cache_failure.h

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/*
 * Copyright 2015 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.
 */


#ifndef NET_INSTAWEB_HTTP_PUBLIC_HTTP_CACHE_FAILURE_H_
#define NET_INSTAWEB_HTTP_PUBLIC_HTTP_CACHE_FAILURE_H_

#include "pagespeed/kernel/base/string_util.h"
#include "pagespeed/kernel/http/http_names.h"
#include "pagespeed/kernel/http/response_headers.h"

namespace net_instaweb {

enum FetchResponseStatus {
  kFetchStatusNotSet = 0,
  kFetchStatusOK = 1,
  kFetchStatusUncacheable200 = 2,
  kFetchStatusUncacheableError = 3,
  kFetchStatus4xxError = 4,
  kFetchStatusOtherError = 5,
  kFetchStatusDropped = 6,
  kFetchStatusEmpty = 7
};

struct HttpCacheFailurePolicy {
  HttpCacheFailurePolicy();

  int ttl_sec_for_status[8];
};

class HttpCacheFailure {
 public:
  static FetchResponseStatus ClassifyFailure(
      const ResponseHeaders& headers,
      StringPiece contents,
      bool physical_fetch_success, 
      bool external_cacheable);

  static bool IsFailureCachingStatus(HttpStatus::Code code);

  static FetchResponseStatus DecodeFailureCachingStatus(HttpStatus::Code code);
  static HttpStatus::Code EncodeFailureCachingStatus(
      FetchResponseStatus status);
};

}  

#endif