src/​examples/​cpp03/​local/​stream_server.​cppsrc/​examples/​cpp11/​local/​stream_server.​cpp
1 /​/​1 /​/​
2 /​/​·​stream_server.​cpp2 /​/​·​stream_server.​cpp
3 /​/​·​~~~~~~~~~~~~~~~~~3 /​/​·​~~~~~~~~~~~~~~~~~
4 /​/​4 /​/​
5 /​/​·​Copyright·​(c)​·​2003-​2021·​Christopher·​M.​·​Kohlhoff·​(chris·​at·​kohlhoff·​dot·​com)​5 /​/​·​Copyright·​(c)​·​2003-​2021·​Christopher·​M.​·​Kohlhoff·​(chris·​at·​kohlhoff·​dot·​com)​
6 /​/​6 /​/​
7 /​/​·​Distributed·​under·​the·​Boost·​Software·​License,​·​Version·​1.​0.​·​(See·​accompanying7 /​/​·​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·​<array>
11 #include·​<cstdio>12 #include·​<cstdio>
12 #include·​<iostream>13 #include·​<iostream>
13 #include·​<boost/​array.​hpp>14 #include·​<memory>
14 #include·<boost/​bind/​bind.​hpp>
15 #include·<boost/​enable_shared_from_th​is.​hpp>
16 #include·<boost/​shared_ptr.​hpp>
17 #include·​"asio.​hpp"15 #include·​"asio.​hpp"
18 16
19 #if·​defined(ASIO_HAS_LOCA​L_SOCKETS)​17 #if·​defined(ASIO_HAS_LOCA​L_SOCKETS)​
20 18
21 using·​asio:​:​local:​:​stream_protocol;​19 using·​asio:​:​local:​:​stream_protocol;​
22 20
23 class·​session21 class·​session
24 ··​:​·​public·boost:​:​enable_shared_from_th​is<session>22 ··​:​·​public·​std:​:​enable_shared_from_th​is<session>
25 {23 {
26 public:​24 public:​
27 ··​session(asio:​:​io_context&·io_context)​25 ··​session(stream_protoc​ol:​:​socket·sock)​
28 ····​:​·​socket_(io_context)​26 ····​:​·​socket_(std:​:​move(sock)​)​
29 ··​{27 ··​{
30 ··​}28 ··​}
31 29
32 ··​stream_protocol:​:​socket&·​socket()​
33 ··​{
34 ····​return·​socket_;​
35 ··​}
36
37 ··​void·​start()​30 ··​void·​start()​
38 ··​{31 ··​{
39 ····socket_.​async_read_some(asio:​:​buffer(data_)​,​32 ····do_read()​;​
40 ········boost:​:​bind(&session:​:​handle_read,​
41 ··········shared_from_this()​,​
42 ··········asio:​:​placeholders:​:​error,​
43 ··········asio:​:​placeholders:​:​bytes_transferred)​)​;​
44 ··}
45
46 ··void·handle_read(const·asio:​:​error_code&·error,​
47 ······size_t·bytes_transferred)​
48 ··{
49 ····if·(!error)​
50 ····{
51 ······asio:​:​async_write(socket_,​
52 ··········asio:​:​buffer(data_,​·bytes_transferred)​,​
53 ··········boost:​:​bind(&session:​:​handle_write,​
54 ············shared_from_this()​,​
55 ············asio:​:​placeholders:​:​error)​)​;​
56 ····}
57 ··​}33 ··​}
58 34
59 ··void·handle_write(const·asio:​:​error_code&·error)​35 private:​
36 ··​void·​do_read()​
60 ··​{37 ··​{
61 ····if·​(!error)​38 ····auto·self(shared_from_this​()​)​;​
62 ····{39 ····socket_.​async_read_some(asio:​:​buffer(data_)​,​
63 ······​socket_.​async_read_some(asio:​:​buffer(data_)​,​40 ········[this,​·self](std:​:​error_code·ec,​·std:​:​size_t·length)​
64 ··········boost:​:​bind(&session:​:​handle_read,​41 ········{
65 ············shared_from_this()​,​42 ··········if·(!ec)​
66 ············asio:​:​placeholders:​:​error,​43 ············do_write(length)​;​
67 ············asio:​:​placeholders:​:​bytes_transferred)​)​;​44 ········})​;​
68 ····​}45 ··​}
46
47 ··​void·​do_write(std:​:​size_t·​length)​
48 ··​{
49 ····​auto·​self(shared_from_this​()​)​;​
50 ····​asio:​:​async_write(socket_,​
51 ········​asio:​:​buffer(data_,​·​length)​,​
52 ········​[this,​·​self](std:​:​error_code·​ec,​·​std:​:​size_t·​/​*length*/​)​
53 ········​{
54 ··········​if·​(!ec)​
55 ············​do_read()​;​
56 ········​})​;​
69 ··​}57 ··​}
70 58
71 private:​
72 ··​/​/​·​The·​socket·​used·​to·​communicate·​with·​the·​client.​59 ··​/​/​·​The·​socket·​used·​to·​communicate·​with·​the·​client.​
73 ··​stream_protocol:​:​socket·​socket_;​60 ··​stream_protocol:​:​socket·​socket_;​
74 61
75 ··​/​/​·​Buffer·​used·​to·​store·​data·​received·​from·​the·​client.​62 ··​/​/​·​Buffer·​used·​to·​store·​data·​received·​from·​the·​client.​
76 ··boost:​:​array<char,​·​1024>·​data_;​63 ··​std:​:​array<char,​·​1024>·​data_;​
77 };​64 };​
78 65
79 typedef·​boost:​:​shared_ptr<session>·​session_ptr;​
80
81 class·​server66 class·​server
82 {67 {
83 public:​68 public:​
84 ··​server(asio:​:​io_context&·​io_context,​·​const·​std:​:​string&·​file)​69 ··​server(asio:​:​io_context&·​io_context,​·​const·​std:​:​string&·​file)​
85 ····​:​·​io_context_(io_contex​t)​,​70 ····​:​·acceptor_(io_context,​·stream_protocol:​:​endpoint(file)​)​
86 ······acceptor_(io_context,​·stream_protocol:​:​endpoint(file)​)​
87 ··​{71 ··​{
88 ····session_ptr·new_session(new·session(io_context_)​)​;​72 ····do_accept()​;​
89 ····acceptor_.​async_accept(new_sess​ion-​>socket()​,​
90 ········boost:​:​bind(&server:​:​handle_accept,​·this,​·new_session,​
91 ··········asio:​:​placeholders:​:​error)​)​;​
92 ··​}73 ··​}
93 74
94 ··void·handle_accept(session​_ptr·new_session,​75 private:​
95 ······const·asio:​:​error_code&·error)​76 ··void·do_accept()​
96 ··​{77 ··​{
97 ····if·(!error)​78 ····acceptor_.​async_accept(
98 ····{79 ········[this](std:​:​error_code·ec,​·stream_protocol:​:​socket·socket)​
99 ······new_session-​>start()​;​80 ········{
100 ····}81 ··········if·(!ec)​
82 ··········​{
83 ············​std:​:​make_shared<session>(​std:​:​move(socket)​)​-​>start()​;​
84 ··········​}
101 85
102 ····new_session.​reset(new·session(io_context_)​)​;​86 ··········do_accept()​;​
103 ····acceptor_.​async_accept(new_sess​ion-​>socket()​,​87 ········})​;​
104 ········boost:​:​bind(&server:​:​handle_accept,​·this,​·new_session,​
105 ··········asio:​:​placeholders:​:​error)​)​;​
106 ··​}88 ··​}
107 89
108 private:​
109 ··​asio:​:​io_context&·​io_context_;​
110 ··​stream_protocol:​:​acceptor·​acceptor_;​90 ··​stream_protocol:​:​acceptor·​acceptor_;​
111 };​91 };​
112 92
113 int·​main(int·​argc,​·​char*·​argv[])​93 int·​main(int·​argc,​·​char*·​argv[])​
114 {94 {
115 ··​try95 ··​try
116 ··​{96 ··​{
117 ····​if·​(argc·​!=·​2)​97 ····​if·​(argc·​!=·​2)​
118 ····​{98 ····​{
119 ······​std:​:​cerr·​<<·​"Usage:​·​stream_server·​<file>\n";​99 ······​std:​:​cerr·​<<·​"Usage:​·​stream_server·​<file>\n";​
120 ······​std:​:​cerr·​<<·​"***·​WARNING:​·​existing·​file·​is·​removed·​***\n";​100 ······​std:​:​cerr·​<<·​"***·​WARNING:​·​existing·​file·​is·​removed·​***\n";​
121 ······​return·​1;​101 ······​return·​1;​
122 ····​}102 ····​}
123 103
124 ····​asio:​:​io_context·​io_context;​104 ····​asio:​:​io_context·​io_context;​
125 105
126 ····​std:​:​remove(argv[1])​;​106 ····​std:​:​remove(argv[1])​;​
127 ····​server·​s(io_context,​·​argv[1])​;​107 ····​server·​s(io_context,​·​argv[1])​;​
128 108
129 ····​io_context.​run()​;​109 ····​io_context.​run()​;​
130 ··​}110 ··​}
131 ··​catch·​(std:​:​exception&·​e)​111 ··​catch·​(std:​:​exception&·​e)​
132 ··​{112 ··​{
133 ····​std:​:​cerr·​<<·​"Exception:​·​"·​<<·​e.​what()​·​<<·​"\n";​113 ····​std:​:​cerr·​<<·​"Exception:​·​"·​<<·​e.​what()​·​<<·​"\n";​
134 ··​}114 ··​}
135 115
136 ··​return·​0;​116 ··​return·​0;​
137 }117 }
138 118
139 #else·​/​/​·​defined(ASIO_HAS_LOCA​L_SOCKETS)​119 #else·​/​/​·​defined(ASIO_HAS_LOCA​L_SOCKETS)​
140 #·​error·​Local·​sockets·​not·​available·​on·​this·​platform.​120 #·​error·​Local·​sockets·​not·​available·​on·​this·​platform.​
141 #endif·​/​/​·​defined(ASIO_HAS_LOCA​L_SOCKETS)​121 #endif·​/​/​·​defined(ASIO_HAS_LOCA​L_SOCKETS)​