]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | // |
2 | // Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com) | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | // | |
7 | ||
8 | #ifndef BEAST_WEBSOCKET_IMPL_TEARDOWN_IPP | |
9 | #define BEAST_WEBSOCKET_IMPL_TEARDOWN_IPP | |
10 | ||
11 | #include <beast/core/async_completion.hpp> | |
12 | #include <beast/core/handler_concepts.hpp> | |
13 | #include <beast/core/handler_helpers.hpp> | |
14 | #include <beast/core/handler_ptr.hpp> | |
15 | #include <memory> | |
16 | ||
17 | namespace beast { | |
18 | namespace websocket { | |
19 | ||
20 | namespace detail { | |
21 | ||
22 | template<class Handler> | |
23 | class teardown_tcp_op | |
24 | { | |
25 | using socket_type = | |
26 | boost::asio::ip::tcp::socket; | |
27 | ||
28 | struct data | |
29 | { | |
30 | bool cont; | |
31 | socket_type& socket; | |
32 | char buf[2048]; | |
33 | int state = 0; | |
34 | ||
35 | data(Handler& handler, socket_type& socket_) | |
36 | : cont(beast_asio_helpers:: | |
37 | is_continuation(handler)) | |
38 | , socket(socket_) | |
39 | { | |
40 | } | |
41 | }; | |
42 | ||
43 | handler_ptr<data, Handler> d_; | |
44 | ||
45 | public: | |
46 | template<class DeducedHandler> | |
47 | teardown_tcp_op( | |
48 | DeducedHandler&& h, | |
49 | socket_type& socket) | |
50 | : d_(std::forward<DeducedHandler>(h), socket) | |
51 | { | |
52 | (*this)(error_code{}, 0, false); | |
53 | } | |
54 | ||
55 | void | |
56 | operator()(error_code ec, std::size_t, bool again = true); | |
57 | ||
58 | friend | |
59 | void* asio_handler_allocate(std::size_t size, | |
60 | teardown_tcp_op* op) | |
61 | { | |
62 | return beast_asio_helpers:: | |
63 | allocate(size, op->d_.handler()); | |
64 | } | |
65 | ||
66 | friend | |
67 | void asio_handler_deallocate(void* p, | |
68 | std::size_t size, teardown_tcp_op* op) | |
69 | { | |
70 | return beast_asio_helpers:: | |
71 | deallocate(p, size, op->d_.handler()); | |
72 | } | |
73 | ||
74 | friend | |
75 | bool asio_handler_is_continuation(teardown_tcp_op* op) | |
76 | { | |
77 | return op->d_->cont; | |
78 | } | |
79 | ||
80 | template<class Function> | |
81 | friend | |
82 | void asio_handler_invoke(Function&& f, | |
83 | teardown_tcp_op* op) | |
84 | { | |
85 | return beast_asio_helpers:: | |
86 | invoke(f, op->d_.handler()); | |
87 | } | |
88 | }; | |
89 | ||
90 | template<class Handler> | |
91 | void | |
92 | teardown_tcp_op<Handler>:: | |
93 | operator()(error_code ec, std::size_t, bool again) | |
94 | { | |
95 | using boost::asio::buffer; | |
96 | auto& d = *d_; | |
97 | d.cont = d.cont || again; | |
98 | while(! ec) | |
99 | { | |
100 | switch(d.state) | |
101 | { | |
102 | case 0: | |
103 | d.state = 1; | |
104 | d.socket.shutdown( | |
105 | boost::asio::ip::tcp::socket::shutdown_send, ec); | |
106 | break; | |
107 | ||
108 | case 1: | |
109 | d.socket.async_read_some( | |
110 | buffer(d.buf), std::move(*this)); | |
111 | return; | |
112 | } | |
113 | } | |
114 | if(ec == boost::asio::error::eof) | |
115 | { | |
116 | d.socket.close(ec); | |
117 | ec = error_code{}; | |
118 | } | |
119 | d_.invoke(ec); | |
120 | } | |
121 | ||
122 | } // detail | |
123 | ||
124 | //------------------------------------------------------------------------------ | |
125 | ||
126 | inline | |
127 | void | |
128 | teardown(teardown_tag, | |
129 | boost::asio::ip::tcp::socket& socket, | |
130 | error_code& ec) | |
131 | { | |
132 | using boost::asio::buffer; | |
133 | socket.shutdown( | |
134 | boost::asio::ip::tcp::socket::shutdown_send, ec); | |
135 | while(! ec) | |
136 | { | |
137 | char buf[8192]; | |
138 | auto const n = socket.read_some( | |
139 | buffer(buf), ec); | |
140 | if(! n) | |
141 | break; | |
142 | } | |
143 | if(ec == boost::asio::error::eof) | |
144 | ec = error_code{}; | |
145 | socket.close(ec); | |
146 | } | |
147 | ||
148 | template<class TeardownHandler> | |
149 | inline | |
150 | void | |
151 | async_teardown(teardown_tag, | |
152 | boost::asio::ip::tcp::socket& socket, | |
153 | TeardownHandler&& handler) | |
154 | { | |
155 | static_assert(beast::is_CompletionHandler< | |
156 | TeardownHandler, void(error_code)>::value, | |
157 | "TeardownHandler requirements not met"); | |
158 | detail::teardown_tcp_op<typename std::decay< | |
159 | TeardownHandler>::type>{std::forward< | |
160 | TeardownHandler>(handler), socket}; | |
161 | } | |
162 | ||
163 | } // websocket | |
164 | } // beast | |
165 | ||
166 | #endif |