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| 1 // Copyright 2014 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_QUIC_QUIC_IN_MEMORY_CACHE_H_ | |
| 6 #define NET_QUIC_QUIC_IN_MEMORY_CACHE_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/containers/hash_tables.h" | |
| 11 #include "base/files/file_util.h" | |
| 12 #include "base/memory/singleton.h" | |
| 13 #include "base/strings/string_piece.h" | |
| 14 #include "net/http/http_response_headers.h" | |
| 15 | |
| 16 template <typename T> struct DefaultSingletonTraits; | |
| 17 class GURL; | |
| 18 | |
| 19 namespace net { | |
| 20 | |
| 21 extern base::FilePath::StringType g_quic_in_memory_cache_dir; | |
| 22 | |
| 23 namespace test { | |
| 24 class QuicInMemoryCachePeer; | |
| 25 } // namespace | |
| 26 | |
| 27 class QuicServer; | |
| 28 | |
| 29 // In-memory cache for HTTP responses. | |
| 30 // Reads from disk cache generated by: | |
| 31 // `wget -p --save_headers <url>` | |
| 32 class QuicInMemoryCache { | |
| 33 public: | |
| 34 enum SpecialResponseType { | |
| 35 REGULAR_RESPONSE, // Send the headers and body like a server should. | |
| 36 CLOSE_CONNECTION, // Close the connection (sending the close packet). | |
| 37 IGNORE_REQUEST, // Do nothing, expect the client to time out. | |
| 38 }; | |
| 39 | |
| 40 // Container for response header/body pairs. | |
| 41 class Response { | |
| 42 public: | |
| 43 Response(); | |
| 44 ~Response(); | |
| 45 | |
| 46 SpecialResponseType response_type() const { return response_type_; } | |
| 47 const HttpResponseHeaders& headers() const { return *headers_.get(); } | |
| 48 const base::StringPiece body() const { return base::StringPiece(body_); } | |
| 49 | |
| 50 private: | |
| 51 friend class QuicInMemoryCache; | |
| 52 | |
| 53 void set_headers(scoped_refptr<HttpResponseHeaders> headers) { | |
| 54 headers_ = headers; | |
| 55 } | |
| 56 void set_body(base::StringPiece body) { | |
| 57 body.CopyToString(&body_); | |
| 58 } | |
| 59 | |
| 60 SpecialResponseType response_type_; | |
| 61 scoped_refptr<HttpResponseHeaders> headers_; | |
| 62 std::string body_; | |
| 63 | |
| 64 DISALLOW_COPY_AND_ASSIGN(Response); | |
| 65 }; | |
| 66 | |
| 67 // Returns the singleton instance of the cache. | |
| 68 static QuicInMemoryCache* GetInstance(); | |
| 69 | |
| 70 // Retrieve a response from this cache for a given request. | |
| 71 // If no appropriate response exists, nullptr is returned. | |
| 72 // Currently, responses are selected based on request URI only. | |
| 73 const Response* GetResponse(const GURL& url) const; | |
| 74 | |
| 75 // Adds a simple response to the cache. The response headers will | |
| 76 // only contain the "content-length" header with the length of |body|. | |
| 77 void AddSimpleResponse(base::StringPiece path, | |
| 78 base::StringPiece version, | |
| 79 base::StringPiece response_code, | |
| 80 base::StringPiece response_detail, | |
| 81 base::StringPiece body); | |
| 82 | |
| 83 // Add a response to the cache. | |
| 84 void AddResponse(const GURL& url, | |
| 85 scoped_refptr<HttpResponseHeaders> response_headers, | |
| 86 base::StringPiece response_body); | |
| 87 | |
| 88 // Simulate a special behavior at a particular path. | |
| 89 void AddSpecialResponse(base::StringPiece path, | |
| 90 SpecialResponseType response_type); | |
| 91 | |
| 92 private: | |
| 93 typedef base::hash_map<std::string, Response*> ResponseMap; | |
| 94 friend struct DefaultSingletonTraits<QuicInMemoryCache>; | |
| 95 friend class test::QuicInMemoryCachePeer; | |
| 96 | |
| 97 QuicInMemoryCache(); | |
| 98 ~QuicInMemoryCache(); | |
| 99 | |
| 100 void ResetForTests(); | |
| 101 | |
| 102 void Initialize(); | |
| 103 | |
| 104 std::string GetKey(const GURL& url) const; | |
| 105 | |
| 106 // Cached responses. | |
| 107 ResponseMap responses_; | |
| 108 | |
| 109 DISALLOW_COPY_AND_ASSIGN(QuicInMemoryCache); | |
| 110 }; | |
| 111 | |
| 112 } // namespace net | |
| 113 | |
| 114 #endif // NET_QUIC_QUIC_IN_MEMORY_CACHE_H_ | |
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