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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_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 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, nullptr 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_ | |
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