libs/http/src/serializer.cpp
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43.0% Branches (117/272)
libs/http/src/serializer.cpp
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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // Copyright (c) 2024 Christian Mazakas | ||
| 4 | // Copyright (c) 2024 Mohammad Nejati | ||
| 5 | // | ||
| 6 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 7 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 8 | // | ||
| 9 | // Official repository: https://github.com/cppalliance/http | ||
| 10 | // | ||
| 11 | |||
| 12 | #include <boost/http/detail/except.hpp> | ||
| 13 | #include <boost/http/detail/header.hpp> | ||
| 14 | #include <boost/http/message_base.hpp> | ||
| 15 | #include <boost/http/serializer.hpp> | ||
| 16 | |||
| 17 | #include "src/detail/array_of_const_buffers.hpp" | ||
| 18 | #include "src/detail/brotli_filter_base.hpp" | ||
| 19 | #include "src/detail/buffer_utils.hpp" | ||
| 20 | #include "src/detail/zlib_filter_base.hpp" | ||
| 21 | |||
| 22 | #include <boost/capy/buffers/circular_dynamic_buffer.hpp> | ||
| 23 | #include <boost/capy/buffers/buffer_copy.hpp> | ||
| 24 | #include <boost/capy/ex/system_context.hpp> | ||
| 25 | #include <boost/core/bit.hpp> | ||
| 26 | #include <boost/core/ignore_unused.hpp> | ||
| 27 | #include <boost/http/brotli/encode.hpp> | ||
| 28 | #include <boost/http/zlib/compression_method.hpp> | ||
| 29 | #include <boost/http/zlib/compression_strategy.hpp> | ||
| 30 | #include <boost/http/zlib/deflate.hpp> | ||
| 31 | #include <boost/http/zlib/error.hpp> | ||
| 32 | #include <boost/http/zlib/flush.hpp> | ||
| 33 | |||
| 34 | #include <memory> | ||
| 35 | #include <stddef.h> | ||
| 36 | |||
| 37 | namespace boost { | ||
| 38 | namespace http { | ||
| 39 | |||
| 40 | namespace { | ||
| 41 | |||
| 42 | const | ||
| 43 | capy::const_buffer | ||
| 44 | crlf_and_final_chunk = {"\r\n0\r\n\r\n", 7}; | ||
| 45 | |||
| 46 | const | ||
| 47 | capy::const_buffer | ||
| 48 | crlf = {"\r\n", 2}; | ||
| 49 | |||
| 50 | const | ||
| 51 | capy::const_buffer | ||
| 52 | final_chunk = {"0\r\n\r\n", 5}; | ||
| 53 | |||
| 54 | constexpr | ||
| 55 | std::uint8_t | ||
| 56 | 82 | chunk_header_len( | |
| 57 | std::size_t max_chunk_size) noexcept | ||
| 58 | { | ||
| 59 | return | ||
| 60 | static_cast<uint8_t>( | ||
| 61 | 82 | (core::bit_width(max_chunk_size) + 3) / 4 + | |
| 62 | 82 | 2); // crlf | |
| 63 | }; | ||
| 64 | |||
| 65 | void | ||
| 66 | 35 | write_chunk_header( | |
| 67 | const capy::mutable_buffer_pair& mbs, | ||
| 68 | std::size_t size) noexcept | ||
| 69 | { | ||
| 70 | static constexpr char hexdig[] = | ||
| 71 | "0123456789ABCDEF"; | ||
| 72 | char buf[18]; | ||
| 73 | 35 | auto p = buf + 16; | |
| 74 | 35 | auto const n = capy::buffer_size(mbs); | |
| 75 |
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174 | for(std::size_t i = n - 2; i--;) |
| 76 | { | ||
| 77 | 139 | *--p = hexdig[size & 0xf]; | |
| 78 | 139 | size >>= 4; | |
| 79 | } | ||
| 80 | 35 | buf[16] = '\r'; | |
| 81 | 35 | buf[17] = '\n'; | |
| 82 | 35 | auto copied = capy::buffer_copy( | |
| 83 | mbs, | ||
| 84 | 70 | capy::const_buffer(p, n)); | |
| 85 | ignore_unused(copied); | ||
| 86 |
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35 | BOOST_ASSERT(copied == n); |
| 87 | 35 | } | |
| 88 | |||
| 89 | class zlib_filter | ||
| 90 | : public detail::zlib_filter_base | ||
| 91 | { | ||
| 92 | http::zlib::deflate_service& svc_; | ||
| 93 | |||
| 94 | public: | ||
| 95 | ✗ | zlib_filter( | |
| 96 | http::zlib::deflate_service& svc, | ||
| 97 | int comp_level, | ||
| 98 | int window_bits, | ||
| 99 | int mem_level) | ||
| 100 | ✗ | : svc_(svc) | |
| 101 | { | ||
| 102 | ✗ | system::error_code ec = static_cast<http::zlib::error>(svc_.init2( | |
| 103 | ✗ | strm_, | |
| 104 | comp_level, | ||
| 105 | http::zlib::deflated, | ||
| 106 | window_bits, | ||
| 107 | mem_level, | ||
| 108 | ✗ | http::zlib::default_strategy)); | |
| 109 | ✗ | if(ec != http::zlib::error::ok) | |
| 110 | ✗ | detail::throw_system_error(ec); | |
| 111 | ✗ | } | |
| 112 | |||
| 113 | private: | ||
| 114 | virtual | ||
| 115 | std::size_t | ||
| 116 | ✗ | min_out_buffer() const noexcept override | |
| 117 | { | ||
| 118 | ✗ | return 8; | |
| 119 | } | ||
| 120 | |||
| 121 | virtual | ||
| 122 | results | ||
| 123 | ✗ | do_process( | |
| 124 | capy::mutable_buffer out, | ||
| 125 | capy::const_buffer in, | ||
| 126 | bool more) noexcept override | ||
| 127 | { | ||
| 128 | ✗ | strm_.next_out = static_cast<unsigned char*>(out.data()); | |
| 129 | ✗ | strm_.avail_out = saturate_cast(out.size()); | |
| 130 | ✗ | strm_.next_in = static_cast<unsigned char*>(const_cast<void *>(in.data())); | |
| 131 | ✗ | strm_.avail_in = saturate_cast(in.size()); | |
| 132 | |||
| 133 | auto rs = static_cast<http::zlib::error>( | ||
| 134 | ✗ | svc_.deflate( | |
| 135 | ✗ | strm_, | |
| 136 | more ? http::zlib::no_flush : http::zlib::finish)); | ||
| 137 | |||
| 138 | ✗ | results rv; | |
| 139 | ✗ | rv.out_bytes = saturate_cast(out.size()) - strm_.avail_out; | |
| 140 | ✗ | rv.in_bytes = saturate_cast(in.size()) - strm_.avail_in; | |
| 141 | ✗ | rv.finished = (rs == http::zlib::error::stream_end); | |
| 142 | |||
| 143 | ✗ | if(rs < http::zlib::error::ok && rs != http::zlib::error::buf_err) | |
| 144 | ✗ | rv.ec = rs; | |
| 145 | |||
| 146 | ✗ | return rv; | |
| 147 | } | ||
| 148 | }; | ||
| 149 | |||
| 150 | class brotli_filter | ||
| 151 | : public detail::brotli_filter_base | ||
| 152 | { | ||
| 153 | http::brotli::encode_service& svc_; | ||
| 154 | http::brotli::encoder_state* state_; | ||
| 155 | |||
| 156 | public: | ||
| 157 | ✗ | brotli_filter( | |
| 158 | http::brotli::encode_service& svc, | ||
| 159 | std::uint32_t comp_quality, | ||
| 160 | std::uint32_t comp_window) | ||
| 161 | ✗ | : svc_(svc) | |
| 162 | { | ||
| 163 | ✗ | state_ = svc_.create_instance(nullptr, nullptr, nullptr); | |
| 164 | ✗ | if(!state_) | |
| 165 | ✗ | detail::throw_bad_alloc(); | |
| 166 | using encoder_parameter = http::brotli::encoder_parameter; | ||
| 167 | ✗ | svc_.set_parameter(state_, encoder_parameter::quality, comp_quality); | |
| 168 | ✗ | svc_.set_parameter(state_, encoder_parameter::lgwin, comp_window); | |
| 169 | ✗ | } | |
| 170 | |||
| 171 | ✗ | ~brotli_filter() | |
| 172 | ✗ | { | |
| 173 | ✗ | svc_.destroy_instance(state_); | |
| 174 | ✗ | } | |
| 175 | |||
| 176 | private: | ||
| 177 | virtual | ||
| 178 | results | ||
| 179 | ✗ | do_process( | |
| 180 | capy::mutable_buffer out, | ||
| 181 | capy::const_buffer in, | ||
| 182 | bool more) noexcept override | ||
| 183 | { | ||
| 184 | ✗ | auto* next_in = reinterpret_cast<const std::uint8_t*>(in.data()); | |
| 185 | ✗ | auto available_in = in.size(); | |
| 186 | ✗ | auto* next_out = reinterpret_cast<std::uint8_t*>(out.data()); | |
| 187 | ✗ | auto available_out = out.size(); | |
| 188 | |||
| 189 | using encoder_operation = | ||
| 190 | http::brotli::encoder_operation; | ||
| 191 | |||
| 192 | ✗ | bool rs = svc_.compress_stream( | |
| 193 | state_, | ||
| 194 | more ? encoder_operation::process : encoder_operation::finish, | ||
| 195 | &available_in, | ||
| 196 | &next_in, | ||
| 197 | &available_out, | ||
| 198 | &next_out, | ||
| 199 | nullptr); | ||
| 200 | |||
| 201 | ✗ | results rv; | |
| 202 | ✗ | rv.in_bytes = in.size() - available_in; | |
| 203 | ✗ | rv.out_bytes = out.size() - available_out; | |
| 204 | ✗ | rv.finished = svc_.is_finished(state_); | |
| 205 | |||
| 206 | ✗ | if(rs == false) | |
| 207 | ✗ | rv.ec = error::bad_payload; | |
| 208 | |||
| 209 | ✗ | return rv; | |
| 210 | } | ||
| 211 | }; | ||
| 212 | |||
| 213 | template<class UInt> | ||
| 214 | std::size_t | ||
| 215 | 10 | clamp( | |
| 216 | UInt x, | ||
| 217 | std::size_t limit = (std::numeric_limits< | ||
| 218 | std::size_t>::max)()) noexcept | ||
| 219 | { | ||
| 220 |
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10 | if(x >= limit) |
| 221 | 2 | return limit; | |
| 222 | 8 | return static_cast<std::size_t>(x); | |
| 223 | } | ||
| 224 | |||
| 225 | } // namespace | ||
| 226 | |||
| 227 | //------------------------------------------------ | ||
| 228 | |||
| 229 | class serializer::impl | ||
| 230 | { | ||
| 231 | enum class state | ||
| 232 | { | ||
| 233 | reset, | ||
| 234 | start, | ||
| 235 | header, | ||
| 236 | body | ||
| 237 | }; | ||
| 238 | |||
| 239 | enum class style | ||
| 240 | { | ||
| 241 | empty, | ||
| 242 | buffers, | ||
| 243 | stream | ||
| 244 | }; | ||
| 245 | |||
| 246 | std::shared_ptr<serializer_config_impl const> cfg_; | ||
| 247 | detail::workspace ws_; | ||
| 248 | |||
| 249 | std::unique_ptr<detail::filter> filter_; | ||
| 250 | cbs_gen* cbs_gen_ = nullptr; | ||
| 251 | |||
| 252 | capy::circular_dynamic_buffer out_; | ||
| 253 | capy::circular_dynamic_buffer in_; | ||
| 254 | detail::array_of_const_buffers prepped_; | ||
| 255 | capy::const_buffer tmp_; | ||
| 256 | |||
| 257 | state state_ = state::start; | ||
| 258 | style style_ = style::empty; | ||
| 259 | uint8_t chunk_header_len_ = 0; | ||
| 260 | bool more_input_ = false; | ||
| 261 | bool is_chunked_ = false; | ||
| 262 | bool needs_exp100_continue_ = false; | ||
| 263 | bool filter_done_ = false; | ||
| 264 | |||
| 265 | public: | ||
| 266 | message_base const* msg_ = nullptr; | ||
| 267 | |||
| 268 | explicit | ||
| 269 | 87 | impl(std::shared_ptr<serializer_config_impl const> cfg) | |
| 270 | 87 | : cfg_(std::move(cfg)) | |
| 271 |
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87 | , ws_(cfg_->space_needed) |
| 272 | { | ||
| 273 | 87 | } | |
| 274 | |||
| 275 | ✗ | impl( | |
| 276 | std::shared_ptr<serializer_config_impl const> cfg, | ||
| 277 | message_base const& msg) | ||
| 278 | ✗ | : cfg_(std::move(cfg)) | |
| 279 | ✗ | , ws_(cfg_->space_needed) | |
| 280 | ✗ | , msg_(&msg) | |
| 281 | { | ||
| 282 | ✗ | } | |
| 283 | |||
| 284 | void | ||
| 285 | 43 | reset() noexcept | |
| 286 | { | ||
| 287 | 43 | filter_.reset(); | |
| 288 | 43 | ws_.clear(); | |
| 289 | 43 | state_ = state::start; | |
| 290 | 43 | } | |
| 291 | |||
| 292 | auto | ||
| 293 | 170 | prepare() -> | |
| 294 | system::result<const_buffers_type> | ||
| 295 | { | ||
| 296 | // Precondition violation | ||
| 297 |
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170 | if(state_ < state::header) |
| 298 | 1 | detail::throw_logic_error(); | |
| 299 | |||
| 300 | // Expect: 100-continue | ||
| 301 |
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169 | if(needs_exp100_continue_) |
| 302 | { | ||
| 303 |
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4 | if(!is_header_done()) |
| 304 | 4 | return const_buffers_type( | |
| 305 | prepped_.begin(), | ||
| 306 | 2 | 1); // limit to header | |
| 307 | |||
| 308 | 2 | needs_exp100_continue_ = false; | |
| 309 | |||
| 310 | 2 | BOOST_HTTP_RETURN_EC( | |
| 311 | error::expect_100_continue); | ||
| 312 | } | ||
| 313 | |||
| 314 |
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165 | if(!filter_) |
| 315 | { | ||
| 316 |
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165 | switch(style_) |
| 317 | { | ||
| 318 | 6 | case style::empty: | |
| 319 | 6 | break; | |
| 320 | |||
| 321 | 22 | case style::buffers: | |
| 322 | { | ||
| 323 | // add more buffers if prepped_ is half empty. | ||
| 324 |
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34 | if(more_input_ && |
| 325 | 12 | prepped_.capacity() >= prepped_.size()) | |
| 326 | { | ||
| 327 | 6 | prepped_.slide_to_front(); | |
| 328 |
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54 | while(prepped_.capacity() != 0) |
| 329 | { | ||
| 330 |
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51 | auto buf = cbs_gen_->next(); |
| 331 |
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51 | if(buf.size() == 0) |
| 332 | 3 | break; | |
| 333 | 48 | prepped_.append(buf); | |
| 334 | } | ||
| 335 |
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6 | if(cbs_gen_->is_empty()) |
| 336 | { | ||
| 337 |
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4 | if(is_chunked_) |
| 338 | { | ||
| 339 |
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1 | if(prepped_.capacity() != 0) |
| 340 | { | ||
| 341 | 1 | prepped_.append( | |
| 342 | crlf_and_final_chunk); | ||
| 343 | 1 | more_input_ = false; | |
| 344 | } | ||
| 345 | } | ||
| 346 | else | ||
| 347 | { | ||
| 348 | 3 | more_input_ = false; | |
| 349 | } | ||
| 350 | } | ||
| 351 | } | ||
| 352 |
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22 | return detail::make_span(prepped_); |
| 353 | } | ||
| 354 | |||
| 355 | 137 | case style::stream: | |
| 356 |
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137 | if(out_.size() == 0 && is_header_done() && more_input_) |
| 357 | 31 | BOOST_HTTP_RETURN_EC( | |
| 358 | error::need_data); | ||
| 359 | 106 | break; | |
| 360 | } | ||
| 361 | } | ||
| 362 | else // filter | ||
| 363 | { | ||
| 364 | ✗ | switch(style_) | |
| 365 | { | ||
| 366 | ✗ | case style::empty: | |
| 367 | { | ||
| 368 | ✗ | if(out_capacity() == 0 || filter_done_) | |
| 369 | ✗ | break; | |
| 370 | |||
| 371 | ✗ | const auto rs = filter_->process( | |
| 372 | ✗ | detail::make_span(out_prepare()), | |
| 373 | {}, // empty input | ||
| 374 | false); | ||
| 375 | |||
| 376 | ✗ | if(rs.ec) | |
| 377 | { | ||
| 378 | ✗ | ws_.clear(); | |
| 379 | ✗ | state_ = state::reset; | |
| 380 | ✗ | return rs.ec; | |
| 381 | } | ||
| 382 | |||
| 383 | ✗ | out_commit(rs.out_bytes); | |
| 384 | |||
| 385 | ✗ | if(rs.finished) | |
| 386 | { | ||
| 387 | ✗ | filter_done_ = true; | |
| 388 | ✗ | out_finish(); | |
| 389 | } | ||
| 390 | |||
| 391 | ✗ | break; | |
| 392 | } | ||
| 393 | |||
| 394 | ✗ | case style::buffers: | |
| 395 | { | ||
| 396 | ✗ | while(out_capacity() != 0 && !filter_done_) | |
| 397 | { | ||
| 398 | ✗ | if(more_input_ && tmp_.size() == 0) | |
| 399 | { | ||
| 400 | ✗ | tmp_ = cbs_gen_->next(); | |
| 401 | ✗ | if(tmp_.size() == 0) // cbs_gen_ is empty | |
| 402 | ✗ | more_input_ = false; | |
| 403 | } | ||
| 404 | |||
| 405 | ✗ | const auto rs = filter_->process( | |
| 406 | ✗ | detail::make_span(out_prepare()), | |
| 407 | {{ {tmp_}, {} }}, | ||
| 408 | ✗ | more_input_); | |
| 409 | |||
| 410 | ✗ | if(rs.ec) | |
| 411 | { | ||
| 412 | ✗ | ws_.clear(); | |
| 413 | ✗ | state_ = state::reset; | |
| 414 | ✗ | return rs.ec; | |
| 415 | } | ||
| 416 | |||
| 417 | ✗ | capy::remove_prefix(tmp_, rs.in_bytes); | |
| 418 | ✗ | out_commit(rs.out_bytes); | |
| 419 | |||
| 420 | ✗ | if(rs.out_short) | |
| 421 | ✗ | break; | |
| 422 | |||
| 423 | ✗ | if(rs.finished) | |
| 424 | { | ||
| 425 | ✗ | filter_done_ = true; | |
| 426 | ✗ | out_finish(); | |
| 427 | } | ||
| 428 | } | ||
| 429 | ✗ | break; | |
| 430 | } | ||
| 431 | |||
| 432 | ✗ | case style::stream: | |
| 433 | { | ||
| 434 | ✗ | if(out_capacity() == 0 || filter_done_) | |
| 435 | ✗ | break; | |
| 436 | |||
| 437 | ✗ | const auto rs = filter_->process( | |
| 438 | ✗ | detail::make_span(out_prepare()), | |
| 439 | in_.data(), | ||
| 440 | ✗ | more_input_); | |
| 441 | |||
| 442 | ✗ | if(rs.ec) | |
| 443 | { | ||
| 444 | ✗ | ws_.clear(); | |
| 445 | ✗ | state_ = state::reset; | |
| 446 | ✗ | return rs.ec; | |
| 447 | } | ||
| 448 | |||
| 449 | ✗ | in_.consume(rs.in_bytes); | |
| 450 | ✗ | out_commit(rs.out_bytes); | |
| 451 | |||
| 452 | ✗ | if(rs.finished) | |
| 453 | { | ||
| 454 | ✗ | filter_done_ = true; | |
| 455 | ✗ | out_finish(); | |
| 456 | } | ||
| 457 | |||
| 458 | ✗ | if(out_.size() == 0 && is_header_done() && more_input_) | |
| 459 | ✗ | BOOST_HTTP_RETURN_EC( | |
| 460 | error::need_data); | ||
| 461 | ✗ | break; | |
| 462 | } | ||
| 463 | } | ||
| 464 | } | ||
| 465 | |||
| 466 | 112 | prepped_.reset(!is_header_done()); | |
| 467 |
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336 | for(auto const& cb : out_.data()) |
| 468 | { | ||
| 469 |
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224 | if(cb.size() != 0) |
| 470 | 89 | prepped_.append(cb); | |
| 471 | } | ||
| 472 |
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112 | return detail::make_span(prepped_); |
| 473 | } | ||
| 474 | |||
| 475 | void | ||
| 476 | 1848 | consume( | |
| 477 | std::size_t n) | ||
| 478 | { | ||
| 479 | // Precondition violation | ||
| 480 |
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1848 | if(state_ < state::header) |
| 481 | 1 | detail::throw_logic_error(); | |
| 482 | |||
| 483 |
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1847 | if(!is_header_done()) |
| 484 | { | ||
| 485 | const auto header_remain = | ||
| 486 | 77 | prepped_[0].size(); | |
| 487 |
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77 | if(n < header_remain) |
| 488 | { | ||
| 489 | 32 | prepped_.consume(n); | |
| 490 | 32 | return; | |
| 491 | } | ||
| 492 | 45 | n -= header_remain; | |
| 493 | 45 | prepped_.consume(header_remain); | |
| 494 | 45 | state_ = state::body; | |
| 495 | } | ||
| 496 | |||
| 497 | 1815 | prepped_.consume(n); | |
| 498 | |||
| 499 | // no-op when out_ is not in use | ||
| 500 | 1815 | out_.consume(n); | |
| 501 | |||
| 502 |
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1815 | if(!prepped_.empty()) |
| 503 | 1744 | return; | |
| 504 | |||
| 505 |
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71 | if(more_input_) |
| 506 | 33 | return; | |
| 507 | |||
| 508 |
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38 | if(filter_ && !filter_done_) |
| 509 | ✗ | return; | |
| 510 | |||
| 511 |
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38 | if(needs_exp100_continue_) |
| 512 | 1 | return; | |
| 513 | |||
| 514 | // ready for next message | ||
| 515 | 37 | reset(); | |
| 516 | } | ||
| 517 | |||
| 518 | void | ||
| 519 | 91 | start_init( | |
| 520 | message_base const& m) | ||
| 521 | { | ||
| 522 | // Precondition violation | ||
| 523 |
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91 | if(state_ != state::start) |
| 524 | ✗ | detail::throw_logic_error(); | |
| 525 | |||
| 526 | // TODO: To uphold the strong exception guarantee, | ||
| 527 | // `state_` must be reset to `state::start` if an | ||
| 528 | // exception is thrown during the start operation. | ||
| 529 | 91 | state_ = state::header; | |
| 530 | |||
| 531 | // VFALCO what do we do with | ||
| 532 | // metadata error code failures? | ||
| 533 | // m.h_.md.maybe_throw(); | ||
| 534 | |||
| 535 | 91 | auto const& md = m.metadata(); | |
| 536 | 91 | needs_exp100_continue_ = md.expect.is_100_continue; | |
| 537 | |||
| 538 | // Transfer-Encoding | ||
| 539 | 91 | is_chunked_ = md.transfer_encoding.is_chunked; | |
| 540 | |||
| 541 | // Content-Encoding | ||
| 542 |
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91 | switch (md.content_encoding.coding) |
| 543 | { | ||
| 544 | ✗ | case content_coding::deflate: | |
| 545 | ✗ | if(!cfg_->apply_deflate_encoder) | |
| 546 | ✗ | goto no_filter; | |
| 547 | ✗ | if(auto* svc = capy::get_system_context().find_service<http::zlib::deflate_service>()) | |
| 548 | { | ||
| 549 | ✗ | filter_.reset(new zlib_filter( | |
| 550 | *svc, | ||
| 551 | ✗ | cfg_->zlib_comp_level, | |
| 552 | ✗ | cfg_->zlib_window_bits, | |
| 553 | ✗ | cfg_->zlib_mem_level)); | |
| 554 | ✗ | filter_done_ = false; | |
| 555 | } | ||
| 556 | ✗ | break; | |
| 557 | |||
| 558 | ✗ | case content_coding::gzip: | |
| 559 | ✗ | if(!cfg_->apply_gzip_encoder) | |
| 560 | ✗ | goto no_filter; | |
| 561 | ✗ | if(auto* svc = capy::get_system_context().find_service<http::zlib::deflate_service>()) | |
| 562 | { | ||
| 563 | ✗ | filter_.reset(new zlib_filter( | |
| 564 | *svc, | ||
| 565 | ✗ | cfg_->zlib_comp_level, | |
| 566 | ✗ | cfg_->zlib_window_bits + 16, | |
| 567 | ✗ | cfg_->zlib_mem_level)); | |
| 568 | ✗ | filter_done_ = false; | |
| 569 | } | ||
| 570 | ✗ | break; | |
| 571 | |||
| 572 | ✗ | case content_coding::br: | |
| 573 | ✗ | if(!cfg_->apply_brotli_encoder) | |
| 574 | ✗ | goto no_filter; | |
| 575 | ✗ | if(auto* svc = capy::get_system_context().find_service<http::brotli::encode_service>()) | |
| 576 | { | ||
| 577 | ✗ | filter_.reset(new brotli_filter( | |
| 578 | *svc, | ||
| 579 | ✗ | cfg_->brotli_comp_quality, | |
| 580 | ✗ | cfg_->brotli_comp_window)); | |
| 581 | ✗ | filter_done_ = false; | |
| 582 | } | ||
| 583 | ✗ | break; | |
| 584 | |||
| 585 | ✗ | no_filter: | |
| 586 | 91 | default: | |
| 587 | 91 | filter_.reset(); | |
| 588 | 91 | break; | |
| 589 | } | ||
| 590 | 91 | } | |
| 591 | |||
| 592 | void | ||
| 593 | 6 | start_empty( | |
| 594 | message_base const& m) | ||
| 595 | { | ||
| 596 | 6 | start_init(m); | |
| 597 | 6 | style_ = style::empty; | |
| 598 | |||
| 599 |
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6 | prepped_ = make_array( |
| 600 | 1 + // header | ||
| 601 | 2); // out buffer pairs | ||
| 602 | |||
| 603 | 6 | out_init(); | |
| 604 | |||
| 605 |
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6 | if(!filter_) |
| 606 | 6 | out_finish(); | |
| 607 | |||
| 608 | 6 | prepped_.append({ m.h_.cbuf, m.h_.size }); | |
| 609 | 6 | more_input_ = false; | |
| 610 | 6 | } | |
| 611 | |||
| 612 | void | ||
| 613 | 10 | start_buffers( | |
| 614 | message_base const& m, | ||
| 615 | cbs_gen& cbs_gen) | ||
| 616 | { | ||
| 617 | // start_init() already called | ||
| 618 | 10 | style_ = style::buffers; | |
| 619 | 10 | cbs_gen_ = &cbs_gen; | |
| 620 | |||
| 621 |
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10 | if(!filter_) |
| 622 | { | ||
| 623 |
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10 | auto stats = cbs_gen_->stats(); |
| 624 | 10 | auto batch_size = clamp(stats.count, 16); | |
| 625 | |||
| 626 | ✗ | prepped_ = make_array( | |
| 627 | 1 + // header | ||
| 628 |
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10 | batch_size + // buffers |
| 629 |
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10 | (is_chunked_ ? 2 : 0)); // chunk header + final chunk |
| 630 | |||
| 631 | 10 | prepped_.append({ m.h_.cbuf, m.h_.size }); | |
| 632 | 10 | more_input_ = (batch_size != 0); | |
| 633 | |||
| 634 |
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10 | if(is_chunked_) |
| 635 | { | ||
| 636 |
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2 | if(!more_input_) |
| 637 | { | ||
| 638 | 1 | prepped_.append(final_chunk); | |
| 639 | } | ||
| 640 | else | ||
| 641 | { | ||
| 642 | 1 | auto h_len = chunk_header_len(stats.size); | |
| 643 | capy::mutable_buffer mb( | ||
| 644 |
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1 | ws_.reserve_front(h_len), h_len); |
| 645 | 1 | write_chunk_header({{ {mb}, {} }}, stats.size); | |
| 646 | 1 | prepped_.append(mb); | |
| 647 | } | ||
| 648 | } | ||
| 649 | 10 | return; | |
| 650 | } | ||
| 651 | |||
| 652 | // filter | ||
| 653 | |||
| 654 | ✗ | prepped_ = make_array( | |
| 655 | 1 + // header | ||
| 656 | 2); // out buffer pairs | ||
| 657 | |||
| 658 | ✗ | out_init(); | |
| 659 | |||
| 660 | ✗ | prepped_.append({ m.h_.cbuf, m.h_.size }); | |
| 661 | ✗ | tmp_ = {}; | |
| 662 | ✗ | more_input_ = true; | |
| 663 | } | ||
| 664 | |||
| 665 | void | ||
| 666 | 75 | start_stream(message_base const& m) | |
| 667 | { | ||
| 668 | 75 | start_init(m); | |
| 669 | 75 | style_ = style::stream; | |
| 670 | |||
| 671 |
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75 | prepped_ = make_array( |
| 672 | 1 + // header | ||
| 673 | 2); // out buffer pairs | ||
| 674 | |||
| 675 |
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75 | if(filter_) |
| 676 | { | ||
| 677 | // TODO: smarter buffer distribution | ||
| 678 | ✗ | auto const n = (ws_.size() - 1) / 2; | |
| 679 | ✗ | in_ = { ws_.reserve_front(n), n }; | |
| 680 | } | ||
| 681 | |||
| 682 | 75 | out_init(); | |
| 683 | |||
| 684 | 75 | prepped_.append({ m.h_.cbuf, m.h_.size }); | |
| 685 | 75 | more_input_ = true; | |
| 686 | 75 | } | |
| 687 | |||
| 688 | std::size_t | ||
| 689 | 92 | stream_capacity() const | |
| 690 | { | ||
| 691 |
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92 | if(filter_) |
| 692 | ✗ | return in_.capacity(); | |
| 693 | 92 | return out_capacity(); | |
| 694 | } | ||
| 695 | |||
| 696 | capy::mutable_buffer_pair | ||
| 697 | 68 | stream_prepare() | |
| 698 | { | ||
| 699 |
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68 | if(state_ == state::start) |
| 700 | { | ||
| 701 | ✗ | if(!msg_) | |
| 702 | ✗ | detail::throw_logic_error(); | |
| 703 | ✗ | start_stream(*msg_); | |
| 704 | } | ||
| 705 |
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68 | if(filter_) |
| 706 | ✗ | return in_.prepare(in_.capacity()); | |
| 707 | 68 | return out_prepare(); | |
| 708 | } | ||
| 709 | |||
| 710 | void | ||
| 711 | 75 | stream_commit(std::size_t n) | |
| 712 | { | ||
| 713 |
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75 | if(n > stream_capacity()) |
| 714 | 1 | detail::throw_invalid_argument(); | |
| 715 | |||
| 716 |
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74 | if(filter_) |
| 717 | ✗ | return in_.commit(n); | |
| 718 | |||
| 719 | 74 | out_commit(n); | |
| 720 | } | ||
| 721 | |||
| 722 | void | ||
| 723 | 40 | stream_close() noexcept | |
| 724 | { | ||
| 725 |
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40 | if(!filter_) |
| 726 | 40 | out_finish(); | |
| 727 | |||
| 728 | 40 | more_input_ = false; | |
| 729 | 40 | } | |
| 730 | |||
| 731 | bool | ||
| 732 | 236 | is_done() const noexcept | |
| 733 | { | ||
| 734 | 236 | return state_ == state::start; | |
| 735 | } | ||
| 736 | |||
| 737 | detail::workspace& | ||
| 738 | 10 | ws() noexcept | |
| 739 | { | ||
| 740 | 10 | return ws_; | |
| 741 | } | ||
| 742 | |||
| 743 | private: | ||
| 744 | bool | ||
| 745 | 2014 | is_header_done() const noexcept | |
| 746 | { | ||
| 747 | 2014 | return state_ == state::body; | |
| 748 | } | ||
| 749 | |||
| 750 | detail::array_of_const_buffers | ||
| 751 | 91 | make_array(std::size_t n) | |
| 752 | { | ||
| 753 |
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91 | BOOST_ASSERT(n <= std::uint16_t(-1)); |
| 754 | |||
| 755 | return { | ||
| 756 | 91 | ws_.push_array(n, | |
| 757 | ✗ | capy::const_buffer{}), | |
| 758 |
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91 | static_cast<std::uint16_t>(n) }; |
| 759 | } | ||
| 760 | |||
| 761 | void | ||
| 762 | 81 | out_init() | |
| 763 | { | ||
| 764 | // use all the remaining buffer | ||
| 765 | 81 | auto const n = ws_.size() - 1; | |
| 766 |
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81 | out_ = { ws_.reserve_front(n), n }; |
| 767 | 81 | chunk_header_len_ = | |
| 768 | 81 | chunk_header_len(out_.capacity()); | |
| 769 |
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81 | if(out_capacity() == 0) |
| 770 | ✗ | detail::throw_length_error(); | |
| 771 | 81 | } | |
| 772 | |||
| 773 | capy::mutable_buffer_pair | ||
| 774 | 68 | out_prepare() noexcept | |
| 775 | { | ||
| 776 | 68 | auto mbp = out_.prepare(out_.capacity()); | |
| 777 |
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68 | if(is_chunked_) |
| 778 | { | ||
| 779 | 35 | capy::remove_prefix( | |
| 780 | 35 | mbp, chunk_header_len_); | |
| 781 | 35 | capy::remove_suffix( | |
| 782 | mbp, crlf_and_final_chunk.size()); | ||
| 783 | } | ||
| 784 | 68 | return mbp; | |
| 785 | } | ||
| 786 | |||
| 787 | void | ||
| 788 | 74 | out_commit( | |
| 789 | std::size_t n) noexcept | ||
| 790 | { | ||
| 791 |
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74 | if(is_chunked_) |
| 792 | { | ||
| 793 |
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35 | if(n == 0) |
| 794 | 1 | return; | |
| 795 | |||
| 796 | 34 | write_chunk_header(out_.prepare(chunk_header_len_), n); | |
| 797 | 34 | out_.commit(chunk_header_len_); | |
| 798 | |||
| 799 | 34 | out_.prepare(n); | |
| 800 | 34 | out_.commit(n); | |
| 801 | |||
| 802 | 34 | capy::buffer_copy(out_.prepare(crlf.size()), crlf); | |
| 803 | 34 | out_.commit(crlf.size()); | |
| 804 | } | ||
| 805 | else | ||
| 806 | { | ||
| 807 | 39 | out_.commit(n); | |
| 808 | } | ||
| 809 | } | ||
| 810 | |||
| 811 | std::size_t | ||
| 812 | 173 | out_capacity() const noexcept | |
| 813 | { | ||
| 814 |
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173 | if(is_chunked_) |
| 815 | { | ||
| 816 | 82 | auto const overhead = chunk_header_len_ + | |
| 817 | 82 | crlf_and_final_chunk.size(); | |
| 818 |
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82 | if(out_.capacity() < overhead) |
| 819 | 1 | return 0; | |
| 820 | 81 | return out_.capacity() - overhead; | |
| 821 | } | ||
| 822 | 91 | return out_.capacity(); | |
| 823 | } | ||
| 824 | |||
| 825 | void | ||
| 826 | 46 | out_finish() noexcept | |
| 827 | { | ||
| 828 |
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46 | if(is_chunked_) |
| 829 | { | ||
| 830 | 23 | capy::buffer_copy( | |
| 831 | 23 | out_.prepare(final_chunk.size()), final_chunk); | |
| 832 | 23 | out_.commit(final_chunk.size()); | |
| 833 | } | ||
| 834 | 46 | } | |
| 835 | }; | ||
| 836 | |||
| 837 | //------------------------------------------------ | ||
| 838 | |||
| 839 | 92 | serializer:: | |
| 840 | ~serializer() | ||
| 841 | { | ||
| 842 |
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92 | delete impl_; |
| 843 | 92 | } | |
| 844 | |||
| 845 | 1 | serializer:: | |
| 846 | 1 | serializer(serializer&& other) noexcept | |
| 847 | 1 | : impl_(other.impl_) | |
| 848 | { | ||
| 849 | 1 | other.impl_ = nullptr; | |
| 850 | 1 | } | |
| 851 | |||
| 852 | serializer& | ||
| 853 | 2 | serializer:: | |
| 854 | operator=(serializer&& other) noexcept | ||
| 855 | { | ||
| 856 |
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2 | if(this != &other) |
| 857 | { | ||
| 858 |
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2 | delete impl_; |
| 859 | 2 | impl_ = other.impl_; | |
| 860 | 2 | other.impl_ = nullptr; | |
| 861 | } | ||
| 862 | 2 | return *this; | |
| 863 | } | ||
| 864 | |||
| 865 | 87 | serializer:: | |
| 866 | serializer( | ||
| 867 | 87 | std::shared_ptr<serializer_config_impl const> cfg) | |
| 868 |
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87 | : impl_(new impl(std::move(cfg))) |
| 869 | { | ||
| 870 | 87 | } | |
| 871 | |||
| 872 | ✗ | serializer:: | |
| 873 | serializer( | ||
| 874 | std::shared_ptr<serializer_config_impl const> cfg, | ||
| 875 | ✗ | message_base const& m) | |
| 876 | ✗ | : impl_(new impl(std::move(cfg), m)) | |
| 877 | { | ||
| 878 | ✗ | } | |
| 879 | |||
| 880 | void | ||
| 881 | 6 | serializer:: | |
| 882 | reset() noexcept | ||
| 883 | { | ||
| 884 |
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6 | BOOST_ASSERT(impl_); |
| 885 | 6 | impl_->reset(); | |
| 886 | 6 | } | |
| 887 | |||
| 888 | void | ||
| 889 | ✗ | serializer:: | |
| 890 | set_message(message_base const& m) noexcept | ||
| 891 | { | ||
| 892 | ✗ | BOOST_ASSERT(impl_); | |
| 893 | ✗ | impl_->msg_ = &m; | |
| 894 | ✗ | } | |
| 895 | |||
| 896 | void | ||
| 897 | 6 | serializer:: | |
| 898 | start(message_base const& m) | ||
| 899 | { | ||
| 900 |
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6 | BOOST_ASSERT(impl_); |
| 901 | 6 | impl_->start_empty(m); | |
| 902 | 6 | } | |
| 903 | |||
| 904 | void | ||
| 905 | ✗ | serializer:: | |
| 906 | start() | ||
| 907 | { | ||
| 908 | ✗ | if(!impl_ || !impl_->msg_) | |
| 909 | ✗ | detail::throw_logic_error(); | |
| 910 | ✗ | impl_->start_empty(*impl_->msg_); | |
| 911 | ✗ | } | |
| 912 | |||
| 913 | void | ||
| 914 | 75 | serializer:: | |
| 915 | start_stream( | ||
| 916 | message_base const& m) | ||
| 917 | { | ||
| 918 |
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75 | BOOST_ASSERT(impl_); |
| 919 | 75 | impl_->start_stream(m); | |
| 920 | 75 | } | |
| 921 | |||
| 922 | void | ||
| 923 | ✗ | serializer:: | |
| 924 | start_stream() | ||
| 925 | { | ||
| 926 | ✗ | if(!impl_ || !impl_->msg_) | |
| 927 | ✗ | detail::throw_logic_error(); | |
| 928 | ✗ | impl_->start_stream(*impl_->msg_); | |
| 929 | ✗ | } | |
| 930 | |||
| 931 | auto | ||
| 932 | 170 | serializer:: | |
| 933 | prepare() -> | ||
| 934 | system::result<const_buffers_type> | ||
| 935 | { | ||
| 936 |
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170 | BOOST_ASSERT(impl_); |
| 937 | 170 | return impl_->prepare(); | |
| 938 | } | ||
| 939 | |||
| 940 | void | ||
| 941 | 1848 | serializer:: | |
| 942 | consume(std::size_t n) | ||
| 943 | { | ||
| 944 |
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1848 | BOOST_ASSERT(impl_); |
| 945 | 1848 | impl_->consume(n); | |
| 946 | 1847 | } | |
| 947 | |||
| 948 | bool | ||
| 949 | 236 | serializer:: | |
| 950 | is_done() const noexcept | ||
| 951 | { | ||
| 952 |
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236 | BOOST_ASSERT(impl_); |
| 953 | 236 | return impl_->is_done(); | |
| 954 | } | ||
| 955 | |||
| 956 | //------------------------------------------------ | ||
| 957 | |||
| 958 | detail::workspace& | ||
| 959 | 10 | serializer:: | |
| 960 | ws() | ||
| 961 | { | ||
| 962 |
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10 | BOOST_ASSERT(impl_); |
| 963 | 10 | return impl_->ws(); | |
| 964 | } | ||
| 965 | |||
| 966 | void | ||
| 967 | 10 | serializer:: | |
| 968 | start_init(message_base const& m) | ||
| 969 | { | ||
| 970 |
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10 | BOOST_ASSERT(impl_); |
| 971 | 10 | impl_->start_init(m); | |
| 972 | 10 | } | |
| 973 | |||
| 974 | void | ||
| 975 | 10 | serializer:: | |
| 976 | start_buffers( | ||
| 977 | message_base const& m, | ||
| 978 | cbs_gen& cbs_gen) | ||
| 979 | { | ||
| 980 |
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10 | BOOST_ASSERT(impl_); |
| 981 | 10 | impl_->start_buffers(m, cbs_gen); | |
| 982 | 10 | } | |
| 983 | |||
| 984 | //------------------------------------------------ | ||
| 985 | |||
| 986 | std::size_t | ||
| 987 | 17 | serializer:: | |
| 988 | stream_capacity() const | ||
| 989 | { | ||
| 990 |
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17 | BOOST_ASSERT(impl_); |
| 991 | 17 | return impl_->stream_capacity(); | |
| 992 | } | ||
| 993 | |||
| 994 | auto | ||
| 995 | 68 | serializer:: | |
| 996 | stream_prepare() -> | ||
| 997 | mutable_buffers_type | ||
| 998 | { | ||
| 999 |
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68 | BOOST_ASSERT(impl_); |
| 1000 | 68 | return impl_->stream_prepare(); | |
| 1001 | } | ||
| 1002 | |||
| 1003 | void | ||
| 1004 | 75 | serializer:: | |
| 1005 | stream_commit(std::size_t n) | ||
| 1006 | { | ||
| 1007 |
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75 | BOOST_ASSERT(impl_); |
| 1008 | 75 | impl_->stream_commit(n); | |
| 1009 | 74 | } | |
| 1010 | |||
| 1011 | void | ||
| 1012 | 40 | serializer:: | |
| 1013 | stream_close() noexcept | ||
| 1014 | { | ||
| 1015 |
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40 | BOOST_ASSERT(impl_); |
| 1016 | 40 | impl_->stream_close(); | |
| 1017 | 40 | } | |
| 1018 | |||
| 1019 | } // http | ||
| 1020 | } // boost | ||
| 1021 |