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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef NET_HTTP_HTTP_VARY_DATA_H_ | |
| 6 #define NET_HTTP_HTTP_VARY_DATA_H_ | |
| 7 | |
| 8 #include "base/md5.h" | |
| 9 #include "net/base/net_export.h" | |
| 10 | |
| 11 class Pickle; | |
| 12 class PickleIterator; | |
| 13 | |
| 14 namespace net { | |
| 15 | |
| 16 struct HttpRequestInfo; | |
| 17 class HttpResponseHeaders; | |
| 18 | |
| 19 // Used to implement the HTTP/1.1 Vary header. This class contains a MD5 hash | |
| 20 // over the request headers indicated by a Vary header. | |
| 21 // | |
| 22 // While RFC 2616 requires strict request header comparisons, it is much | |
| 23 // cheaper to store a MD5 sum, which should be sufficient. Storing a hash also | |
| 24 // avoids messy privacy issues as some of the request headers could hold | |
| 25 // sensitive data (e.g., cookies). | |
| 26 // | |
| 27 // NOTE: This class does not hold onto the contents of the Vary header. | |
| 28 // Instead, it relies on the consumer to store that and to supply it again to | |
| 29 // the MatchesRequest function for comparing against future HTTP requests. | |
| 30 // | |
| 31 class NET_EXPORT_PRIVATE HttpVaryData { | |
| 32 public: | |
| 33 HttpVaryData(); | |
| 34 | |
| 35 bool is_valid() const { return is_valid_; } | |
| 36 | |
| 37 // Initialize from a request and its corresponding response headers. | |
| 38 // | |
| 39 // Returns true if a Vary header was found in the response headers and that | |
| 40 // Vary header was not empty and did not contain the '*' value. Upon | |
| 41 // success, the object is also marked as valid such that is_valid() will | |
| 42 // return true. Otherwise, false is returned to indicate that this object | |
| 43 // is marked as invalid. | |
| 44 // | |
| 45 bool Init(const HttpRequestInfo& request_info, | |
| 46 const HttpResponseHeaders& response_headers); | |
| 47 | |
| 48 // Initialize from a pickle that contains data generated by a call to the | |
| 49 // vary data's Persist method. | |
| 50 // | |
| 51 // Upon success, true is returned and the object is marked as valid such that | |
| 52 // is_valid() will return true. Otherwise, false is returned to indicate | |
| 53 // that this object is marked as invalid. | |
| 54 // | |
| 55 bool InitFromPickle(PickleIterator* pickle_iter); | |
| 56 | |
| 57 // Call this method to persist the vary data. Illegal to call this on an | |
| 58 // invalid object. | |
| 59 void Persist(Pickle* pickle) const; | |
| 60 | |
| 61 // Call this method to test if the given request matches the previous request | |
| 62 // with which this vary data corresponds. The |cached_response_headers| must | |
| 63 // be the same response headers used to generate this vary data. | |
| 64 bool MatchesRequest(const HttpRequestInfo& request_info, | |
| 65 const HttpResponseHeaders& cached_response_headers) const; | |
| 66 | |
| 67 private: | |
| 68 // Returns the corresponding request header value. | |
| 69 static std::string GetRequestValue(const HttpRequestInfo& request_info, | |
| 70 const std::string& request_header); | |
| 71 | |
| 72 // Append to the MD5 context for the given request header. | |
| 73 static void AddField(const HttpRequestInfo& request_info, | |
| 74 const std::string& request_header, | |
| 75 base::MD5Context* context); | |
| 76 | |
| 77 // A digested version of the request headers corresponding to the Vary header. | |
| 78 base::MD5Digest request_digest_; | |
| 79 | |
| 80 // True when request_digest_ contains meaningful data. | |
| 81 bool is_valid_; | |
| 82 }; | |
| 83 | |
| 84 } // namespace net | |
| 85 | |
| 86 #endif // NET_HTTP_HTTP_VARY_DATA_H_ | |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master