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_TOOLS_QUIC_QUIC_IN_MEMORY_CACHE_H_ 6 #define NET_TOOLS_QUIC_QUIC_IN_MEMORY_CACHE_H_ 7 8 #include <string> 9 10 #include "base/containers/hash_tables.h" 11 #include "base/memory/singleton.h" 12 #include "base/strings/string_piece.h" 13 #include "net/tools/balsa/balsa_frame.h" 14 #include "net/tools/balsa/balsa_headers.h" 15 #include "net/tools/balsa/noop_balsa_visitor.h" 16 17 template <typename T> struct DefaultSingletonTraits; 18 19 namespace net { 20 namespace tools { 21 22 namespace test { 23 class QuicInMemoryCachePeer; 24 } // namespace 25 26 extern std::string FLAGS_quic_in_memory_cache_dir; 27 28 class QuicServer; 29 30 // In-memory cache for HTTP responses. 31 // Reads from disk cache generated by: 32 // `wget -p --save_headers <url>` 33 class QuicInMemoryCache { 34 public: 35 enum SpecialResponseType { 36 REGULAR_RESPONSE, // Send the headers and body like a server should. 37 CLOSE_CONNECTION, // Close the connection (sending the close packet). 38 IGNORE_REQUEST, // Do nothing, expect the client to time out. 39 }; 40 41 // Container for response header/body pairs. 42 class Response { 43 public: 44 Response() : response_type_(REGULAR_RESPONSE) {} 45 ~Response() {} 46 47 const SpecialResponseType response_type() const { return response_type_; } 48 const BalsaHeaders& headers() const { return headers_; } 49 const base::StringPiece body() const { return base::StringPiece(body_); } 50 51 private: 52 friend class QuicInMemoryCache; 53 54 void set_headers(const BalsaHeaders& headers) { 55 headers_.CopyFrom(headers); 56 } 57 void set_body(base::StringPiece body) { 58 body.CopyToString(&body_); 59 } 60 61 SpecialResponseType response_type_; 62 BalsaHeaders headers_; 63 std::string body_; 64 65 DISALLOW_COPY_AND_ASSIGN(Response); 66 }; 67 68 // Returns the singleton instance of the cache. 69 static QuicInMemoryCache* GetInstance(); 70 71 // Retrieve a response from this cache for a given request. 72 // If no appropriate response exists, NULL is returned. 73 // Currently, responses are selected based on request URI only. 74 const Response* GetResponse(const BalsaHeaders& request_headers) const; 75 76 // Adds a simple response to the cache. The response headers will 77 // only contain the "content-length" header with the lenght of |body|. 78 void AddSimpleResponse(base::StringPiece method, 79 base::StringPiece path, 80 base::StringPiece version, 81 base::StringPiece response_code, 82 base::StringPiece response_detail, 83 base::StringPiece body); 84 85 // Add a response to the cache. 86 void AddResponse(const BalsaHeaders& request_headers, 87 const BalsaHeaders& response_headers, 88 base::StringPiece response_body); 89 90 // Simulate a special behavior at a particular path. 91 void AddSpecialResponse(base::StringPiece method, 92 base::StringPiece path, 93 base::StringPiece version, 94 SpecialResponseType response_type); 95 96 private: 97 typedef base::hash_map<std::string, Response*> ResponseMap; 98 friend struct DefaultSingletonTraits<QuicInMemoryCache>; 99 friend class test::QuicInMemoryCachePeer; 100 101 QuicInMemoryCache(); 102 ~QuicInMemoryCache(); 103 104 void ResetForTests(); 105 106 void Initialize(); 107 108 std::string GetKey(const BalsaHeaders& response_headers) const; 109 110 // Cached responses. 111 ResponseMap responses_; 112 113 DISALLOW_COPY_AND_ASSIGN(QuicInMemoryCache); 114 }; 115 116 } // namespace tools 117 } // namespace net 118 119 #endif // NET_TOOLS_QUIC_QUIC_IN_MEMORY_CACHE_H_ 120