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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| 3 | // Copyright (c) 2025 Mohammad Nejati | ||
| 4 | // | ||
| 5 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 6 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 7 | // | ||
| 8 | // Official repository: https://github.com/cppalliance/beast2 | ||
| 9 | // | ||
| 10 | |||
| 11 | #ifndef BOOST_BEAST2_IMPL_READ_HPP | ||
| 12 | #define BOOST_BEAST2_IMPL_READ_HPP | ||
| 13 | |||
| 14 | #include <boost/beast2/detail/except.hpp> | ||
| 15 | #include <boost/http_proto/error.hpp> | ||
| 16 | #include <boost/http_proto/parser.hpp> | ||
| 17 | #include <boost/asio/append.hpp> | ||
| 18 | #include <boost/asio/compose.hpp> | ||
| 19 | #include <boost/asio/coroutine.hpp> | ||
| 20 | #include <boost/asio/immediate.hpp> | ||
| 21 | #include <boost/assert.hpp> | ||
| 22 | |||
| 23 | namespace boost { | ||
| 24 | namespace beast2 { | ||
| 25 | |||
| 26 | namespace detail { | ||
| 27 | |||
| 28 | template<class AsyncStream> | ||
| 29 | class read_until_op | ||
| 30 | : public asio::coroutine | ||
| 31 | { | ||
| 32 | AsyncStream& stream_; | ||
| 33 | http::parser& pr_; | ||
| 34 | std::size_t total_bytes_ = 0; | ||
| 35 | bool (&condition_)(http::parser&); | ||
| 36 | |||
| 37 | public: | ||
| 38 | 35315 | read_until_op( | |
| 39 | AsyncStream& s, | ||
| 40 | http::parser& pr, | ||
| 41 | bool (&condition)(http::parser&)) noexcept | ||
| 42 | 35315 | : stream_(s) | |
| 43 | 35315 | , pr_(pr) | |
| 44 | 35315 | , condition_(condition) | |
| 45 | { | ||
| 46 | 35315 | } | |
| 47 | |||
| 48 | template<class Self> | ||
| 49 | void | ||
| 50 | 156666 | operator()( | |
| 51 | Self& self, | ||
| 52 | system::error_code ec = {}, | ||
| 53 | std::size_t bytes_transferred = 0) | ||
| 54 | { | ||
| 55 |
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313332 | BOOST_ASIO_CORO_REENTER(*this) |
| 56 | { | ||
| 57 |
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70630 | self.reset_cancellation_state( |
| 58 | 70630 | asio::enable_total_cancellation()); | |
| 59 | |||
| 60 | 27392 | for(;;) | |
| 61 | { | ||
| 62 | 4 | for(;;) | |
| 63 | { | ||
| 64 |
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98026 | pr_.parse(ec); |
| 65 |
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98026 | if(ec == http::condition::need_more_input) |
| 66 | { | ||
| 67 |
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30296 | if(!!self.cancelled()) |
| 68 | { | ||
| 69 | 78 | ec = asio::error::operation_aborted; | |
| 70 | 78 | goto upcall; | |
| 71 | } | ||
| 72 | // specific to http_io::async_read_some | ||
| 73 |
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30218 | if(total_bytes_ != 0 && condition_(pr_)) |
| 74 | { | ||
| 75 | 2820 | ec = {}; | |
| 76 | 2820 | goto upcall; | |
| 77 | } | ||
| 78 | 27398 | break; | |
| 79 | } | ||
| 80 |
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67730 | if(ec.failed() || condition_(pr_)) |
| 81 | { | ||
| 82 |
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67726 | if(total_bytes_ == 0) |
| 83 | { | ||
| 84 |
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175914 | BOOST_ASIO_CORO_YIELD |
| 85 | { | ||
| 86 | BOOST_ASIO_HANDLER_LOCATION(( | ||
| 87 | __FILE__, __LINE__, | ||
| 88 | "immediate")); | ||
| 89 | 58638 | auto io_ex = self.get_io_executor(); | |
| 90 |
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58638 | asio::async_immediate( |
| 91 | io_ex, | ||
| 92 | 58638 | asio::append(std::move(self), ec)); | |
| 93 | 58638 | } | |
| 94 | } | ||
| 95 | 67726 | goto upcall; | |
| 96 | } | ||
| 97 | } | ||
| 98 |
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82194 | BOOST_ASIO_CORO_YIELD |
| 99 | { | ||
| 100 | BOOST_ASIO_HANDLER_LOCATION(( | ||
| 101 | __FILE__, __LINE__, | ||
| 102 | "async_read_some")); | ||
| 103 |
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27398 | stream_.async_read_some( |
| 104 |
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54796 | pr_.prepare(), |
| 105 | 27398 | std::move(self)); | |
| 106 | } | ||
| 107 |
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27398 | pr_.commit(bytes_transferred); |
| 108 | 27398 | total_bytes_ += bytes_transferred; | |
| 109 |
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27398 | if(ec == asio::error::eof) |
| 110 | { | ||
| 111 | ✗ | BOOST_ASSERT( | |
| 112 | bytes_transferred == 0); | ||
| 113 | ✗ | pr_.commit_eof(); | |
| 114 | ✗ | ec = {}; | |
| 115 | } | ||
| 116 |
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27398 | else if(ec.failed()) |
| 117 | { | ||
| 118 | 6 | goto upcall; | |
| 119 | } | ||
| 120 | } | ||
| 121 | |||
| 122 | 70630 | upcall: | |
| 123 |
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70630 | self.complete(ec, total_bytes_); |
| 124 | } | ||
| 125 | 156666 | } | |
| 126 | }; | ||
| 127 | |||
| 128 | inline | ||
| 129 | bool | ||
| 130 | 42932 | got_header_condition(http::parser& pr) | |
| 131 | { | ||
| 132 | 42932 | return pr.got_header(); | |
| 133 | } | ||
| 134 | |||
| 135 | inline | ||
| 136 | bool | ||
| 137 | 44 | is_complete_condition(http::parser& pr) | |
| 138 | { | ||
| 139 | 44 | return pr.is_complete(); | |
| 140 | } | ||
| 141 | |||
| 142 | } // detail | ||
| 143 | |||
| 144 | //------------------------------------------------ | ||
| 145 | |||
| 146 | /** Asynchronously reads some data into the parser. | ||
| 147 | |||
| 148 | This function is used to asynchronously read data from a | ||
| 149 | stream into the parser's input sequence. This function will always | ||
| 150 | keep reading until a complete header is obtained. | ||
| 151 | The function call will invoke the completion token | ||
| 152 | with the following signature: | ||
| 153 | @code | ||
| 154 | void(system::error_code ec | ||
| 155 | std::size_t bytes_transferred); | ||
| 156 | @endcode | ||
| 157 | @note The parser's input sequence may contain additional data | ||
| 158 | beyond what was required to complete the header. | ||
| 159 | @param s The stream to read from. | ||
| 160 | @param pr The parser to read data into. | ||
| 161 | @param token The completion token. | ||
| 162 | */ | ||
| 163 | template< | ||
| 164 | class AsyncReadStream, | ||
| 165 | BOOST_ASIO_COMPLETION_TOKEN_FOR( | ||
| 166 | void(system::error_code, std::size_t)) CompletionToken> | ||
| 167 | BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, | ||
| 168 | void (system::error_code, std::size_t)) | ||
| 169 | 70626 | async_read_some( | |
| 170 | AsyncReadStream& s, | ||
| 171 | http::parser& pr, | ||
| 172 | CompletionToken&& token) | ||
| 173 | { | ||
| 174 | return asio::async_compose< | ||
| 175 | CompletionToken, | ||
| 176 |
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70626 | void(system::error_code, std::size_t)>( |
| 177 | detail::read_until_op<AsyncReadStream> | ||
| 178 | {s, pr, detail::got_header_condition}, | ||
| 179 | token, | ||
| 180 | 70626 | s); | |
| 181 | } | ||
| 182 | |||
| 183 | /** Asynchronously reads data into the parser until the header is complete. | ||
| 184 | This function is used to asynchronously read data from a | ||
| 185 | stream into the parser's input sequence until the parser's | ||
| 186 | header is complete. | ||
| 187 | The function call will invoke the completion token | ||
| 188 | with the following signature: | ||
| 189 | @code | ||
| 190 | void(system::error_code ec | ||
| 191 | std::size_t bytes_transferred); | ||
| 192 | @endcode | ||
| 193 | @note The parser's input sequence may contain additional data | ||
| 194 | beyond what was required to complete the header. | ||
| 195 | @param s The stream to read from. | ||
| 196 | @param pr The parser to read data into. | ||
| 197 | @param token The completion token. | ||
| 198 | */ | ||
| 199 | template< | ||
| 200 | class AsyncReadStream, | ||
| 201 | BOOST_ASIO_COMPLETION_TOKEN_FOR( | ||
| 202 | void(system::error_code, std::size_t)) CompletionToken> | ||
| 203 | BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, | ||
| 204 | void (system::error_code, std::size_t)) | ||
| 205 | 2796 | async_read_header( | |
| 206 | AsyncReadStream& s, | ||
| 207 | http::parser& pr, | ||
| 208 | CompletionToken&& token) | ||
| 209 | { | ||
| 210 | // TODO: async_read_header should not perform a read | ||
| 211 | // operation if `parser::got_header() == true`. | ||
| 212 | 2796 | return async_read_some(s, pr, std::move(token)); | |
| 213 | } | ||
| 214 | |||
| 215 | /** Asynchronously reads data into the parser until the message is complete. | ||
| 216 | This function is used to asynchronously read data from a | ||
| 217 | stream into the parser's input sequence until the parser's | ||
| 218 | message is complete. | ||
| 219 | The function call will invoke the completion token | ||
| 220 | with the following signature: | ||
| 221 | @code | ||
| 222 | void(system::error_code ec | ||
| 223 | std::size_t bytes_transferred); | ||
| 224 | @endcode | ||
| 225 | @note The parser's input sequence may contain additional data | ||
| 226 | beyond what was required to complete the message. | ||
| 227 | @param s The stream to read from. | ||
| 228 | @param pr The parser to read data into. | ||
| 229 | @param token The completion token. | ||
| 230 | */ | ||
| 231 | template< | ||
| 232 | class AsyncReadStream, | ||
| 233 | BOOST_ASIO_COMPLETION_TOKEN_FOR( | ||
| 234 | void(system::error_code, std::size_t)) CompletionToken> | ||
| 235 | BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, | ||
| 236 | void (system::error_code, std::size_t)) | ||
| 237 | 2 | async_read( | |
| 238 | AsyncReadStream& s, | ||
| 239 | http::parser& pr, | ||
| 240 | CompletionToken&& token) | ||
| 241 | { | ||
| 242 | return asio::async_compose< | ||
| 243 | CompletionToken, | ||
| 244 |
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2 | void(system::error_code, std::size_t)>( |
| 245 | detail::read_until_op<AsyncReadStream> | ||
| 246 | {s, pr, detail::is_complete_condition}, | ||
| 247 | token, | ||
| 248 | 2 | s); | |
| 249 | } | ||
| 250 | |||
| 251 | } // beast2 | ||
| 252 | } // boost | ||
| 253 | |||
| 254 | #endif | ||
| 255 |