src/examples/cpp03/buffers/reference_counted.cpp | src/examples/cpp11/buffers/reference_counted.cpp |
⋮ | ⋮ |
1 | // | 1 | // |
2 | //·reference_counted.cpp | 2 | //·reference_counted.cpp |
3 | //·~~~~~~~~~~~~~~~~~~~~~ | 3 | //·~~~~~~~~~~~~~~~~~~~~~ |
4 | // | 4 | // |
5 | //·Copyright·(c)·2003-2018·Christopher·M.·Kohlhoff·(chris·at·kohlhoff·dot·com) | 5 | //·Copyright·(c)·2003-2018·Christopher·M.·Kohlhoff·(chris·at·kohlhoff·dot·com) |
6 | // | 6 | // |
7 | //·Distributed·under·the·Boost·Software·License,·Version·1.0.·(See·accompanying | 7 | //·Distributed·under·the·Boost·Software·License,·Version·1.0.·(See·accompanying |
8 | //·file·LICENSE_1_0.txt·or·copy·at·http://www.boost.org/LICENSE_1_0.txt) | 8 | //·file·LICENSE_1_0.txt·or·copy·at·http://www.boost.org/LICENSE_1_0.txt) |
9 | // | 9 | // |
10 | | 10 | |
11 | #include·<asio.hpp> | 11 | #include·<asio.hpp> |
12 | #include·<boost/bind.hpp> | |
13 | #include·<boost/enable_shared_from_this.hpp> | |
14 | #include·<boost/shared_ptr.hpp> | |
15 | #include·<iostream> | 12 | #include·<iostream> |
| 13 | #include·<memory> |
| 14 | #include·<utility> |
16 | #include·<vector> | 15 | #include·<vector> |
| 16 | #include·<ctime> |
17 | | 17 | |
18 | using·asio::ip::tcp; | 18 | using·asio::ip::tcp; |
19 | | 19 | |
20 | //·A·reference-counted·non-modifiable·buffer·class. | 20 | //·A·reference-counted·non-modifiable·buffer·class. |
21 | class·shared_const_buffer | 21 | class·shared_const_buffer |
22 | { | 22 | { |
23 | public: | 23 | public: |
24 | ··//·Construct·from·a·std::string. | 24 | ··//·Construct·from·a·std::string. |
25 | ··explicit·shared_const_buffer(const·std::string&·data) | 25 | ··explicit·shared_const_buffer(const·std::string&·data) |
26 | ····:·data_(new·std::vector<char>(data.begin(),·data.end())), | 26 | ····:·data_(new·std::vector<char>(data.begin(),·data.end())), |
27 | ······buffer_(asio::buffer(*data_)) | 27 | ······buffer_(asio::buffer(*data_)) |
28 | ··{ | 28 | ··{ |
29 | ··} | 29 | ··} |
30 | | 30 | |
31 | ··//·Implement·the·ConstBufferSequence·requirements. | 31 | ··//·Implement·the·ConstBufferSequence·requirements. |
32 | ··typedef·asio::const_buffer·value_type; | 32 | ··typedef·asio::const_buffer·value_type; |
33 | ··typedef·const·asio::const_buffer*·const_iterator; | 33 | ··typedef·const·asio::const_buffer*·const_iterator; |
34 | ··const·asio::const_buffer*·begin()·const·{·return·&buffer_;·} | 34 | ··const·asio::const_buffer*·begin()·const·{·return·&buffer_;·} |
35 | ··const·asio::const_buffer*·end()·const·{·return·&buffer_·+·1;·} | 35 | ··const·asio::const_buffer*·end()·const·{·return·&buffer_·+·1;·} |
36 | | 36 | |
37 | private: | 37 | private: |
38 | ··boost::shared_ptr<std::vector<char>·>·data_; | 38 | ··std::shared_ptr<std::vector<char>·>·data_; |
39 | ··asio::const_buffer·buffer_; | 39 | ··asio::const_buffer·buffer_; |
40 | }; | 40 | }; |
41 | | 41 | |
42 | class·session | 42 | class·session |
43 | ··:·public·boost::enable_shared_from_this<session> | 43 | ··:·public·std::enable_shared_from_this<session> |
44 | { | 44 | { |
45 | public: | 45 | public: |
46 | ··session(asio::io_context&·io_context) | 46 | ··session(tcp::socket·socket) |
47 | ····:·socket_(io_context) | 47 | ····:·socket_(std::move(socket)) |
48 | ··{ | 48 | ··{ |
49 | ··} | 49 | ··} |
50 | | 50 | |
51 | ··tcp::socket&·socket() | |
52 | ··{ | |
53 | ····return·socket_; | |
54 | ··} | |
55 | | |
56 | ··void·start() | 51 | ··void·start() |
57 | ··{ | 52 | ··{ |
58 | ····using·namespace·std;·//·For·time_t,·time·and·ctime. | 53 | ····do_write(); |
59 | ····time_t·now·=·time(0); | |
60 | ····shared_const_buffer·buffer(ctime(&now)); | |
61 | ····asio::async_write(socket_,·buffer, | |
62 | ········boost::bind(&session::handle_write,·shared_from_this())); | |
63 | ··} | 54 | ··} |
64 | | 55 | |
65 | ··void·handle_write() | 56 | private: |
| 57 | ··void·do_write() |
66 | ··{ | 58 | ··{ |
| 59 | ····std::time_t·now·=·std::time(0); |
| 60 | ····shared_const_buffer·buffer(std::ctime(&now)); |
| 61 | |
| 62 | ····auto·self(shared_from_this()); |
| 63 | ····asio::async_write(socket_,·buffer, |
| 64 | ········[this,·self](std::error_code·/*ec*/,·std::size_t·/*length*/) |
| 65 | ········{ |
| 66 | ········}); |
67 | ··} | 67 | ··} |
68 | | 68 | |
69 | private: | |
70 | ··//·The·socket·used·to·communicate·with·the·client. | 69 | ··//·The·socket·used·to·communicate·with·the·client. |
71 | ··tcp::socket·socket_; | 70 | ··tcp::socket·socket_; |
72 | }; | 71 | }; |
73 | | 72 | |
74 | typedef·boost::shared_ptr<session>·session_ptr; | |
75 | | |
76 | class·server | 73 | class·server |
77 | { | 74 | { |
78 | public: | 75 | public: |
79 | ··server(asio::io_context&·io_context,·short·port) | 76 | ··server(asio::io_context&·io_context,·short·port) |
80 | ····:·io_context_(io_context), | 77 | ····:·acceptor_(io_context,·tcp::endpoint(tcp::v4(),·port)) |
81 | ······acceptor_(io_context,·tcp::endpoint(tcp::v4(),·port)) | |
82 | ··{ | 78 | ··{ |
83 | ····session_ptr·new_session(new·session(io_context_)); | 79 | ····do_accept(); |
84 | ····acceptor_.async_accept(new_session->socket(), | |
85 | ········boost::bind(&server::handle_accept,·this,·new_session, | |
86 | ··········asio::placeholders::error)); | |
87 | ··} | 80 | ··} |
88 | | 81 | |
89 | ··void·handle_accept(session_ptr·new_session, | 82 | private: |
90 | ······const·asio::error_code&·error) | 83 | ··void·do_accept() |
91 | ··{ | 84 | ··{ |
92 | ····if·(!error) | 85 | ····acceptor_.async_accept( |
93 | ····{ | 86 | ········[this](std::error_code·ec,·tcp::socket·socket) |
94 | ······new_session->start(); | 87 | ········{ |
95 | ····} | 88 | ··········if·(!ec) |
| 89 | ··········{ |
| 90 | ············std::make_shared<session>(std::move(socket))->start(); |
| 91 | ··········} |
96 | | 92 | |
97 | ····new_session.reset(new·session(io_context_)); | 93 | ··········do_accept(); |
98 | ····acceptor_.async_accept(new_session->socket(), | 94 | ········}); |
99 | ········boost::bind(&server::handle_accept,·this,·new_session, | |
100 | ··········asio::placeholders::error)); | |
101 | ··} | 95 | ··} |
102 | | 96 | |
103 | private: | |
104 | ··asio::io_context&·io_context_; | |
105 | ··tcp::acceptor·acceptor_; | 97 | ··tcp::acceptor·acceptor_; |
106 | }; | 98 | }; |
107 | | 99 | |
108 | int·main(int·argc,·char*·argv[]) | 100 | int·main(int·argc,·char*·argv[]) |
109 | { | 101 | { |
110 | ··try | 102 | ··try |
111 | ··{ | 103 | ··{ |
112 | ····if·(argc·!=·2) | 104 | ····if·(argc·!=·2) |
113 | ····{ | 105 | ····{ |
114 | ······std::cerr·<<·"Usage:·reference_counted·<port>\n"; | 106 | ······std::cerr·<<·"Usage:·reference_counted·<port>\n"; |
115 | ······return·1; | 107 | ······return·1; |
116 | ····} | 108 | ····} |
117 | | 109 | |
118 | ····asio::io_context·io_context; | 110 | ····asio::io_context·io_context; |
119 | | 111 | |
120 | ····using·namespace·std;·//·For·atoi. | 112 | ····server·s(io_context,·std::atoi(argv[1])); |
121 | ····server·s(io_context,·atoi(argv[1])); | |
122 | | 113 | |
123 | ····io_context.run(); | 114 | ····io_context.run(); |
124 | ··} | 115 | ··} |
125 | ··catch·(std::exception&·e) | 116 | ··catch·(std::exception&·e) |
126 | ··{ | 117 | ··{ |
127 | ····std::cerr·<<·"Exception:·"·<<·e.what()·<<·"\n"; | 118 | ····std::cerr·<<·"Exception:·"·<<·e.what()·<<·"\n"; |
128 | ··} | 119 | ··} |
129 | | 120 | |
130 | ··return·0; | 121 | ··return·0; |
131 | } | 122 | } |