| Line | Branch | Exec | Source |
|---|---|---|---|
| 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_proto | ||
| 10 | // | ||
| 11 | |||
| 12 | #include <boost/http_proto/detail/except.hpp> | ||
| 13 | #include <boost/http_proto/detail/header.hpp> | ||
| 14 | #include <boost/http_proto/message_view_base.hpp> | ||
| 15 | #include <boost/http_proto/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/buffers/circular_buffer.hpp> | ||
| 23 | #include <boost/buffers/copy.hpp> | ||
| 24 | #include <boost/core/bit.hpp> | ||
| 25 | #include <boost/core/ignore_unused.hpp> | ||
| 26 | #include <boost/rts/brotli/encode.hpp> | ||
| 27 | #include <boost/rts/context.hpp> | ||
| 28 | #include <boost/rts/zlib/compression_method.hpp> | ||
| 29 | #include <boost/rts/zlib/compression_strategy.hpp> | ||
| 30 | #include <boost/rts/zlib/deflate.hpp> | ||
| 31 | #include <boost/rts/zlib/error.hpp> | ||
| 32 | #include <boost/rts/zlib/flush.hpp> | ||
| 33 | |||
| 34 | #include <stddef.h> | ||
| 35 | |||
| 36 | namespace boost { | ||
| 37 | namespace http_proto { | ||
| 38 | |||
| 39 | namespace { | ||
| 40 | |||
| 41 | const | ||
| 42 | buffers::const_buffer | ||
| 43 | crlf_and_final_chunk = {"\r\n0\r\n\r\n", 7}; | ||
| 44 | |||
| 45 | const | ||
| 46 | buffers::const_buffer | ||
| 47 | crlf = {"\r\n", 2}; | ||
| 48 | |||
| 49 | const | ||
| 50 | buffers::const_buffer | ||
| 51 | final_chunk = {"0\r\n\r\n", 5}; | ||
| 52 | |||
| 53 | constexpr | ||
| 54 | std::uint8_t | ||
| 55 | 76 | chunk_header_len( | |
| 56 | std::size_t max_chunk_size) noexcept | ||
| 57 | { | ||
| 58 | return | ||
| 59 | static_cast<uint8_t>( | ||
| 60 | 76 | (core::bit_width(max_chunk_size) + 3) / 4 + | |
| 61 | 76 | 2); // crlf | |
| 62 | }; | ||
| 63 | |||
| 64 | void | ||
| 65 | 1146 | write_chunk_header( | |
| 66 | const buffers::mutable_buffer_pair& mbs, | ||
| 67 | std::size_t size) noexcept | ||
| 68 | { | ||
| 69 | static constexpr char hexdig[] = | ||
| 70 | "0123456789ABCDEF"; | ||
| 71 | char buf[18]; | ||
| 72 | 1146 | auto p = buf + 16; | |
| 73 | 1146 | auto const n = buffers::size(mbs); | |
| 74 |
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5729 | for(std::size_t i = n - 2; i--;) |
| 75 | { | ||
| 76 | 4583 | *--p = hexdig[size & 0xf]; | |
| 77 | 4583 | size >>= 4; | |
| 78 | } | ||
| 79 | 1146 | buf[16] = '\r'; | |
| 80 | 1146 | buf[17] = '\n'; | |
| 81 | 1146 | auto copied = buffers::copy( | |
| 82 | mbs, | ||
| 83 | 2292 | buffers::const_buffer(p, n)); | |
| 84 | ignore_unused(copied); | ||
| 85 |
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1146 | BOOST_ASSERT(copied == n); |
| 86 | 1146 | } | |
| 87 | |||
| 88 | //------------------------------------------------ | ||
| 89 | |||
| 90 | class zlib_filter | ||
| 91 | : public detail::zlib_filter_base | ||
| 92 | { | ||
| 93 | rts::zlib::deflate_service& svc_; | ||
| 94 | |||
| 95 | public: | ||
| 96 | 52 | zlib_filter( | |
| 97 | const rts::context& ctx, | ||
| 98 | http_proto::detail::workspace& ws, | ||
| 99 | int comp_level, | ||
| 100 | int window_bits, | ||
| 101 | int mem_level) | ||
| 102 | 52 | : zlib_filter_base(ws) | |
| 103 | 52 | , svc_(ctx.get_service<rts::zlib::deflate_service>()) | |
| 104 | { | ||
| 105 | 104 | system::error_code ec = static_cast<rts::zlib::error>(svc_.init2( | |
| 106 |
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52 | strm_, |
| 107 | comp_level, | ||
| 108 | rts::zlib::deflated, | ||
| 109 | window_bits, | ||
| 110 | mem_level, | ||
| 111 | 52 | rts::zlib::default_strategy)); | |
| 112 |
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52 | if(ec != rts::zlib::error::ok) |
| 113 | ✗ | detail::throw_system_error(ec); | |
| 114 | 52 | } | |
| 115 | |||
| 116 | private: | ||
| 117 | virtual | ||
| 118 | std::size_t | ||
| 119 | 86 | min_out_buffer() const noexcept override | |
| 120 | { | ||
| 121 | // Prevents deflate from producing | ||
| 122 | // zero output due to small buffer | ||
| 123 | 86 | return 8; | |
| 124 | } | ||
| 125 | |||
| 126 | virtual | ||
| 127 | results | ||
| 128 | 4914 | do_process( | |
| 129 | buffers::mutable_buffer out, | ||
| 130 | buffers::const_buffer in, | ||
| 131 | bool more) noexcept override | ||
| 132 | { | ||
| 133 | 4914 | strm_.next_out = static_cast<unsigned char*>(out.data()); | |
| 134 | 4914 | strm_.avail_out = saturate_cast(out.size()); | |
| 135 | 4914 | strm_.next_in = static_cast<unsigned char*>(const_cast<void *>(in.data())); | |
| 136 | 4914 | strm_.avail_in = saturate_cast(in.size()); | |
| 137 | |||
| 138 | auto rs = static_cast<rts::zlib::error>( | ||
| 139 |
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4914 | svc_.deflate( |
| 140 | 4914 | strm_, | |
| 141 | more ? rts::zlib::no_flush : rts::zlib::finish)); | ||
| 142 | |||
| 143 | 4914 | results rv; | |
| 144 | 4914 | rv.out_bytes = saturate_cast(out.size()) - strm_.avail_out; | |
| 145 | 4914 | rv.in_bytes = saturate_cast(in.size()) - strm_.avail_in; | |
| 146 | 4914 | rv.finished = (rs == rts::zlib::error::stream_end); | |
| 147 | |||
| 148 |
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4914 | if(rs < rts::zlib::error::ok && rs != rts::zlib::error::buf_err) |
| 149 | ✗ | rv.ec = rs; | |
| 150 | |||
| 151 | 4914 | return rv; | |
| 152 | } | ||
| 153 | }; | ||
| 154 | |||
| 155 | class brotli_filter | ||
| 156 | : public detail::brotli_filter_base | ||
| 157 | { | ||
| 158 | rts::brotli::encode_service& svc_; | ||
| 159 | rts::brotli::encoder_state* state_; | ||
| 160 | |||
| 161 | public: | ||
| 162 | ✗ | brotli_filter( | |
| 163 | const rts::context& ctx, | ||
| 164 | http_proto::detail::workspace&, | ||
| 165 | std::uint32_t comp_quality, | ||
| 166 | std::uint32_t comp_window) | ||
| 167 | ✗ | : svc_(ctx.get_service<rts::brotli::encode_service>()) | |
| 168 | { | ||
| 169 | // TODO: use custom allocator | ||
| 170 | ✗ | state_ = svc_.create_instance(nullptr, nullptr, nullptr); | |
| 171 | ✗ | if(!state_) | |
| 172 | ✗ | detail::throw_bad_alloc(); | |
| 173 | using encoder_parameter = rts::brotli::encoder_parameter; | ||
| 174 | ✗ | svc_.set_parameter(state_, encoder_parameter::quality, comp_quality); | |
| 175 | ✗ | svc_.set_parameter(state_, encoder_parameter::lgwin, comp_window); | |
| 176 | ✗ | } | |
| 177 | |||
| 178 | ✗ | ~brotli_filter() | |
| 179 | ✗ | { | |
| 180 | ✗ | svc_.destroy_instance(state_); | |
| 181 | ✗ | } | |
| 182 | |||
| 183 | private: | ||
| 184 | virtual | ||
| 185 | results | ||
| 186 | ✗ | do_process( | |
| 187 | buffers::mutable_buffer out, | ||
| 188 | buffers::const_buffer in, | ||
| 189 | bool more) noexcept override | ||
| 190 | { | ||
| 191 | ✗ | auto* next_in = reinterpret_cast<const std::uint8_t*>(in.data()); | |
| 192 | ✗ | auto available_in = in.size(); | |
| 193 | ✗ | auto* next_out = reinterpret_cast<std::uint8_t*>(out.data()); | |
| 194 | ✗ | auto available_out = out.size(); | |
| 195 | |||
| 196 | using encoder_operation = | ||
| 197 | rts::brotli::encoder_operation; | ||
| 198 | |||
| 199 | ✗ | bool rs = svc_.compress_stream( | |
| 200 | state_, | ||
| 201 | more ? encoder_operation::process : encoder_operation::finish, | ||
| 202 | &available_in, | ||
| 203 | &next_in, | ||
| 204 | &available_out, | ||
| 205 | &next_out, | ||
| 206 | nullptr); | ||
| 207 | |||
| 208 | ✗ | results rv; | |
| 209 | ✗ | rv.in_bytes = in.size() - available_in; | |
| 210 | ✗ | rv.out_bytes = out.size() - available_out; | |
| 211 | ✗ | rv.finished = svc_.is_finished(state_); | |
| 212 | |||
| 213 | // TODO: use proper error code | ||
| 214 | ✗ | if(rs == false) | |
| 215 | ✗ | rv.ec = error::bad_payload; | |
| 216 | |||
| 217 | ✗ | return rv; | |
| 218 | } | ||
| 219 | }; | ||
| 220 | |||
| 221 | template<class UInt> | ||
| 222 | std::size_t | ||
| 223 | 8 | clamp( | |
| 224 | UInt x, | ||
| 225 | std::size_t limit = (std::numeric_limits< | ||
| 226 | std::size_t>::max)()) noexcept | ||
| 227 | { | ||
| 228 |
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8 | if(x >= limit) |
| 229 | 2 | return limit; | |
| 230 | 6 | return static_cast<std::size_t>(x); | |
| 231 | } | ||
| 232 | |||
| 233 | class serializer_service | ||
| 234 | : public rts::service | ||
| 235 | { | ||
| 236 | public: | ||
| 237 | serializer::config cfg; | ||
| 238 | std::size_t space_needed = 0; | ||
| 239 | |||
| 240 | 24 | serializer_service( | |
| 241 | const rts::context&, | ||
| 242 | serializer::config const& cfg_) | ||
| 243 | 24 | : cfg(cfg_) | |
| 244 | { | ||
| 245 | 24 | space_needed += cfg.payload_buffer; | |
| 246 | 24 | space_needed += cfg.max_type_erase; | |
| 247 | |||
| 248 |
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24 | if(cfg.apply_deflate_encoder || cfg.apply_gzip_encoder) |
| 249 | { | ||
| 250 | // TODO: Account for the number of allocations and | ||
| 251 | // their overhead in the workspace. | ||
| 252 | |||
| 253 | // https://www.zlib.net/zlib_tech.html | ||
| 254 | 1 | space_needed += | |
| 255 | 1 | (1 << (cfg.zlib_window_bits + 2)) + | |
| 256 | 1 | (1 << (cfg.zlib_mem_level + 9)) + | |
| 257 | 1 | (6 * 1024) + | |
| 258 | #ifdef __s390x__ | ||
| 259 | 5768 + | ||
| 260 | #endif | ||
| 261 | 1 | detail::workspace::space_needed<zlib_filter>(); | |
| 262 | } | ||
| 263 | 24 | } | |
| 264 | }; | ||
| 265 | |||
| 266 | } // namespace | ||
| 267 | |||
| 268 | //------------------------------------------------ | ||
| 269 | |||
| 270 | void | ||
| 271 | 24 | install_serializer_service( | |
| 272 | rts::context& ctx, | ||
| 273 | serializer::config const& cfg) | ||
| 274 | { | ||
| 275 | 24 | ctx.make_service<serializer_service>(cfg); | |
| 276 | 24 | } | |
| 277 | |||
| 278 | //------------------------------------------------ | ||
| 279 | |||
| 280 | class serializer::impl | ||
| 281 | { | ||
| 282 | friend stream; | ||
| 283 | |||
| 284 | enum class state | ||
| 285 | { | ||
| 286 | reset, | ||
| 287 | start, | ||
| 288 | header, | ||
| 289 | body | ||
| 290 | }; | ||
| 291 | |||
| 292 | enum class style | ||
| 293 | { | ||
| 294 | empty, | ||
| 295 | buffers, | ||
| 296 | source, | ||
| 297 | stream | ||
| 298 | }; | ||
| 299 | |||
| 300 | const rts::context& ctx_; | ||
| 301 | serializer_service& svc_; | ||
| 302 | detail::workspace ws_; | ||
| 303 | |||
| 304 | detail::filter* filter_ = nullptr; | ||
| 305 | cbs_gen* cbs_gen_ = nullptr; | ||
| 306 | source* source_ = nullptr; | ||
| 307 | |||
| 308 | buffers::circular_buffer out_; | ||
| 309 | buffers::circular_buffer in_; | ||
| 310 | detail::array_of_const_buffers prepped_; | ||
| 311 | buffers::const_buffer tmp_; | ||
| 312 | |||
| 313 | state state_ = state::start; | ||
| 314 | style style_ = style::empty; | ||
| 315 | uint8_t chunk_header_len_ = 0; | ||
| 316 | bool more_input_ = false; | ||
| 317 | bool is_chunked_ = false; | ||
| 318 | bool needs_exp100_continue_ = false; | ||
| 319 | bool filter_done_ = false; | ||
| 320 | |||
| 321 | public: | ||
| 322 | 24 | impl(const rts::context& ctx) | |
| 323 | 24 | : ctx_(ctx) | |
| 324 | 24 | , svc_(ctx_.get_service<serializer_service>()) | |
| 325 | 24 | , ws_(svc_.space_needed) | |
| 326 | { | ||
| 327 | 24 | } | |
| 328 | |||
| 329 | void | ||
| 330 | 82 | reset() noexcept | |
| 331 | { | ||
| 332 | 82 | ws_.clear(); | |
| 333 | 82 | state_ = state::start; | |
| 334 | 82 | } | |
| 335 | |||
| 336 | auto | ||
| 337 | 2426 | prepare() -> | |
| 338 | system::result<const_buffers_type> | ||
| 339 | { | ||
| 340 | // Precondition violation | ||
| 341 |
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2426 | if(state_ < state::header) |
| 342 | 2 | detail::throw_logic_error(); | |
| 343 | |||
| 344 | // Expect: 100-continue | ||
| 345 |
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2424 | if(needs_exp100_continue_) |
| 346 | { | ||
| 347 |
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4 | if(!is_header_done()) |
| 348 | 4 | return const_buffers_type( | |
| 349 | prepped_.begin(), | ||
| 350 | 2 | 1); // limit to header | |
| 351 | |||
| 352 | 2 | needs_exp100_continue_ = false; | |
| 353 | |||
| 354 | 2 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 355 | error::expect_100_continue); | ||
| 356 | } | ||
| 357 | |||
| 358 |
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2420 | if(!filter_) |
| 359 | { | ||
| 360 |
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62 | switch(style_) |
| 361 | { | ||
| 362 | 6 | case style::empty: | |
| 363 | 6 | break; | |
| 364 | |||
| 365 | 20 | case style::buffers: | |
| 366 | { | ||
| 367 | // add more buffers if prepped_ is half empty. | ||
| 368 |
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30 | if(more_input_ && |
| 369 | 10 | prepped_.capacity() >= prepped_.size()) | |
| 370 | { | ||
| 371 | 4 | prepped_.slide_to_front(); | |
| 372 |
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50 | while(prepped_.capacity() != 0) |
| 373 | { | ||
| 374 |
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48 | auto buf = cbs_gen_->next(); |
| 375 |
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48 | if(buf.size() == 0) |
| 376 | 2 | break; | |
| 377 | 46 | prepped_.append(buf); | |
| 378 | } | ||
| 379 |
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4 | if(cbs_gen_->is_empty()) |
| 380 | { | ||
| 381 |
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2 | if(is_chunked_) |
| 382 | { | ||
| 383 |
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1 | if(prepped_.capacity() != 0) |
| 384 | { | ||
| 385 | 1 | prepped_.append( | |
| 386 | crlf_and_final_chunk); | ||
| 387 | 1 | more_input_ = false; | |
| 388 | } | ||
| 389 | } | ||
| 390 | else | ||
| 391 | { | ||
| 392 | 1 | more_input_ = false; | |
| 393 | } | ||
| 394 | } | ||
| 395 | } | ||
| 396 |
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20 | return detail::make_span(prepped_); |
| 397 | } | ||
| 398 | |||
| 399 | 23 | case style::source: | |
| 400 | { | ||
| 401 |
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23 | if(out_capacity() == 0 || !more_input_) |
| 402 | 22 | break; | |
| 403 | |||
| 404 |
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7 | const auto rs = source_->read( |
| 405 | 7 | out_prepare()); | |
| 406 | |||
| 407 | 7 | out_commit(rs.bytes); | |
| 408 | |||
| 409 |
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7 | if(rs.ec.failed()) |
| 410 | { | ||
| 411 | 1 | ws_.clear(); | |
| 412 | 1 | state_ = state::reset; | |
| 413 | 1 | return rs.ec; | |
| 414 | } | ||
| 415 | |||
| 416 |
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6 | if(rs.finished) |
| 417 | { | ||
| 418 | 6 | more_input_ = false; | |
| 419 | 6 | out_finish(); | |
| 420 | } | ||
| 421 | |||
| 422 | 6 | break; | |
| 423 | } | ||
| 424 | |||
| 425 | 13 | case style::stream: | |
| 426 |
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13 | if(out_.size() == 0 && is_header_done() && more_input_) |
| 427 | 3 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 428 | error::need_data); | ||
| 429 | 10 | break; | |
| 430 | } | ||
| 431 | } | ||
| 432 | else // filter | ||
| 433 | { | ||
| 434 |
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2358 | switch(style_) |
| 435 | { | ||
| 436 | 4 | case style::empty: | |
| 437 | { | ||
| 438 |
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4 | if(out_capacity() == 0 || filter_done_) |
| 439 | 4 | break; | |
| 440 | |||
| 441 |
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12 | const auto rs = filter_->process( |
| 442 |
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4 | detail::make_span(out_prepare()), |
| 443 | {}, // empty input | ||
| 444 | false); | ||
| 445 | |||
| 446 |
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4 | if(rs.ec.failed()) |
| 447 | { | ||
| 448 | ✗ | ws_.clear(); | |
| 449 | ✗ | state_ = state::reset; | |
| 450 | ✗ | return rs.ec; | |
| 451 | } | ||
| 452 | |||
| 453 | 4 | out_commit(rs.out_bytes); | |
| 454 | |||
| 455 |
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4 | if(rs.finished) |
| 456 | { | ||
| 457 | 4 | filter_done_ = true; | |
| 458 | 4 | out_finish(); | |
| 459 | } | ||
| 460 | |||
| 461 | 4 | break; | |
| 462 | } | ||
| 463 | |||
| 464 | 376 | case style::buffers: | |
| 465 | { | ||
| 466 |
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2572 | while(out_capacity() != 0 && !filter_done_) |
| 467 | { | ||
| 468 |
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2196 | if(more_input_ && tmp_.size() == 0) |
| 469 | { | ||
| 470 |
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2008 | tmp_ = cbs_gen_->next(); |
| 471 |
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2008 | if(tmp_.size() == 0) // cbs_gen_ is empty |
| 472 | 16 | more_input_ = false; | |
| 473 | } | ||
| 474 | |||
| 475 |
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4392 | const auto rs = filter_->process( |
| 476 |
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2196 | detail::make_span(out_prepare()), |
| 477 | 2196 | { tmp_, {} }, | |
| 478 | 2196 | more_input_); | |
| 479 | |||
| 480 |
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2196 | if(rs.ec.failed()) |
| 481 | { | ||
| 482 | ✗ | ws_.clear(); | |
| 483 | ✗ | state_ = state::reset; | |
| 484 | ✗ | return rs.ec; | |
| 485 | } | ||
| 486 | |||
| 487 | 2196 | buffers::trim_front(tmp_, rs.in_bytes); | |
| 488 | 2196 | out_commit(rs.out_bytes); | |
| 489 | |||
| 490 |
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|
2196 | if(rs.out_short) |
| 491 | ✗ | break; | |
| 492 | |||
| 493 |
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|
2196 | if(rs.finished) |
| 494 | { | ||
| 495 | 16 | filter_done_ = true; | |
| 496 | 16 | out_finish(); | |
| 497 | } | ||
| 498 | } | ||
| 499 | 376 | break; | |
| 500 | } | ||
| 501 | |||
| 502 | 734 | case style::source: | |
| 503 | { | ||
| 504 |
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|
2180 | while(out_capacity() != 0 && !filter_done_) |
| 505 | { | ||
| 506 |
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|
1446 | if(more_input_ && in_.capacity() != 0) |
| 507 | { | ||
| 508 |
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|
984 | const auto rs = source_->read( |
| 509 |
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|
984 | in_.prepare(in_.capacity())); |
| 510 |
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|
984 | if(rs.ec.failed()) |
| 511 | { | ||
| 512 | ✗ | ws_.clear(); | |
| 513 | ✗ | state_ = state::reset; | |
| 514 | ✗ | return rs.ec; | |
| 515 | } | ||
| 516 |
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|
984 | if(rs.finished) |
| 517 | 16 | more_input_ = false; | |
| 518 | 984 | in_.commit(rs.bytes); | |
| 519 | } | ||
| 520 | |||
| 521 |
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|
1446 | const auto rs = filter_->process( |
| 522 |
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|
1446 | detail::make_span(out_prepare()), |
| 523 | in_.data(), | ||
| 524 | 1446 | more_input_); | |
| 525 | |||
| 526 |
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|
1446 | if(rs.ec.failed()) |
| 527 | { | ||
| 528 | ✗ | ws_.clear(); | |
| 529 | ✗ | state_ = state::reset; | |
| 530 | ✗ | return rs.ec; | |
| 531 | } | ||
| 532 | |||
| 533 | 1446 | in_.consume(rs.in_bytes); | |
| 534 | 1446 | out_commit(rs.out_bytes); | |
| 535 | |||
| 536 |
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|
1446 | if(rs.out_short) |
| 537 | ✗ | break; | |
| 538 | |||
| 539 |
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|
1446 | if(rs.finished) |
| 540 | { | ||
| 541 | 16 | filter_done_ = true; | |
| 542 | 16 | out_finish(); | |
| 543 | } | ||
| 544 | } | ||
| 545 | 734 | break; | |
| 546 | } | ||
| 547 | |||
| 548 | 1244 | case style::stream: | |
| 549 | { | ||
| 550 |
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|
1244 | if(out_capacity() == 0 || filter_done_) |
| 551 | 804 | break; | |
| 552 | |||
| 553 |
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|
1244 | const auto rs = filter_->process( |
| 554 |
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|
1244 | detail::make_span(out_prepare()), |
| 555 | in_.data(), | ||
| 556 | 1244 | more_input_); | |
| 557 | |||
| 558 |
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|
1244 | if(rs.ec.failed()) |
| 559 | { | ||
| 560 | ✗ | ws_.clear(); | |
| 561 | ✗ | state_ = state::reset; | |
| 562 | 440 | return rs.ec; | |
| 563 | } | ||
| 564 | |||
| 565 | 1244 | in_.consume(rs.in_bytes); | |
| 566 | 1244 | out_commit(rs.out_bytes); | |
| 567 | |||
| 568 |
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|
1244 | if(rs.finished) |
| 569 | { | ||
| 570 | 16 | filter_done_ = true; | |
| 571 | 16 | out_finish(); | |
| 572 | } | ||
| 573 | |||
| 574 |
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|
1244 | if(out_.size() == 0 && is_header_done() && more_input_) |
| 575 | 440 | BOOST_HTTP_PROTO_RETURN_EC( | |
| 576 | error::need_data); | ||
| 577 | 804 | break; | |
| 578 | } | ||
| 579 | } | ||
| 580 | } | ||
| 581 | |||
| 582 | 1956 | prepped_.reset(!is_header_done()); | |
| 583 |
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|
5868 | for(auto const& cb : out_.data()) |
| 584 | { | ||
| 585 |
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|
3912 | if(cb.size() != 0) |
| 586 | 1948 | prepped_.append(cb); | |
| 587 | } | ||
| 588 |
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|
1956 | return detail::make_span(prepped_); |
| 589 | } | ||
| 590 | |||
| 591 | void | ||
| 592 | 3717 | consume( | |
| 593 | std::size_t n) | ||
| 594 | { | ||
| 595 | // Precondition violation | ||
| 596 |
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|
3717 | if(state_ < state::header) |
| 597 | 1 | detail::throw_logic_error(); | |
| 598 | |||
| 599 |
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|
3716 | if(!is_header_done()) |
| 600 | { | ||
| 601 | const auto header_remain = | ||
| 602 | 85 | prepped_[0].size(); | |
| 603 |
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|
85 | if(n < header_remain) |
| 604 | { | ||
| 605 | 12 | prepped_.consume(n); | |
| 606 | 12 | return; | |
| 607 | } | ||
| 608 | 73 | n -= header_remain; | |
| 609 | 73 | prepped_.consume(header_remain); | |
| 610 | 73 | state_ = state::body; | |
| 611 | } | ||
| 612 | |||
| 613 | 3704 | prepped_.consume(n); | |
| 614 | |||
| 615 | // no-op when out_ is not in use | ||
| 616 | 3704 | out_.consume(n); | |
| 617 | |||
| 618 |
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|
3704 | if(!prepped_.empty()) |
| 619 | 1759 | return; | |
| 620 | |||
| 621 |
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|
1945 | if(more_input_) |
| 622 | 1837 | return; | |
| 623 | |||
| 624 |
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|
108 | if(filter_ && !filter_done_) |
| 625 | 34 | return; | |
| 626 | |||
| 627 |
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|
74 | if(needs_exp100_continue_) |
| 628 | 1 | return; | |
| 629 | |||
| 630 | // ready for next message | ||
| 631 | 73 | reset(); | |
| 632 | } | ||
| 633 | |||
| 634 | void | ||
| 635 | 84 | start_init( | |
| 636 | message_view_base const& m) | ||
| 637 | { | ||
| 638 | // Precondition violation | ||
| 639 |
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|
84 | if(state_ != state::start) |
| 640 | 1 | detail::throw_logic_error(); | |
| 641 | |||
| 642 | // TODO: To uphold the strong exception guarantee, | ||
| 643 | // `state_` must be reset to `state::start` if an | ||
| 644 | // exception is thrown during the start operation. | ||
| 645 | 83 | state_ = state::header; | |
| 646 | |||
| 647 | // VFALCO what do we do with | ||
| 648 | // metadata error code failures? | ||
| 649 | // m.ph_->md.maybe_throw(); | ||
| 650 | |||
| 651 | 83 | auto const& md = m.metadata(); | |
| 652 | 83 | needs_exp100_continue_ = md.expect.is_100_continue; | |
| 653 | |||
| 654 | // Transfer-Encoding | ||
| 655 | 83 | is_chunked_ = md.transfer_encoding.is_chunked; | |
| 656 | |||
| 657 | // Content-Encoding | ||
| 658 |
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83 | switch (md.content_encoding.coding) |
| 659 | { | ||
| 660 | 26 | case content_coding::deflate: | |
| 661 |
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26 | if(!svc_.cfg.apply_deflate_encoder) |
| 662 | ✗ | goto no_filter; | |
| 663 | 52 | filter_ = &ws_.emplace<zlib_filter>( | |
| 664 | ctx_, | ||
| 665 | 26 | ws_, | |
| 666 | 26 | svc_.cfg.zlib_comp_level, | |
| 667 | 26 | svc_.cfg.zlib_window_bits, | |
| 668 | 26 | svc_.cfg.zlib_mem_level); | |
| 669 | 26 | filter_done_ = false; | |
| 670 | 26 | break; | |
| 671 | |||
| 672 | 26 | case content_coding::gzip: | |
| 673 |
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26 | if(!svc_.cfg.apply_gzip_encoder) |
| 674 | ✗ | goto no_filter; | |
| 675 | 52 | filter_ = &ws_.emplace<zlib_filter>( | |
| 676 | ctx_, | ||
| 677 | 26 | ws_, | |
| 678 | 26 | svc_.cfg.zlib_comp_level, | |
| 679 | 52 | svc_.cfg.zlib_window_bits + 16, | |
| 680 |
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26 | svc_.cfg.zlib_mem_level); |
| 681 | 26 | filter_done_ = false; | |
| 682 | 26 | break; | |
| 683 | |||
| 684 | ✗ | case content_coding::br: | |
| 685 | ✗ | if(!svc_.cfg.apply_brotli_encoder) | |
| 686 | ✗ | goto no_filter; | |
| 687 | ✗ | filter_ = &ws_.emplace<brotli_filter>( | |
| 688 | ctx_, | ||
| 689 | ✗ | ws_, | |
| 690 | ✗ | svc_.cfg.brotli_comp_quality, | |
| 691 | ✗ | svc_.cfg.brotli_comp_window); | |
| 692 | ✗ | filter_done_ = false; | |
| 693 | ✗ | break; | |
| 694 | |||
| 695 | ✗ | no_filter: | |
| 696 | 31 | default: | |
| 697 | 31 | filter_ = nullptr; | |
| 698 | 31 | break; | |
| 699 | } | ||
| 700 | 83 | } | |
| 701 | |||
| 702 | void | ||
| 703 | 12 | start_empty( | |
| 704 | message_view_base const& m) | ||
| 705 | { | ||
| 706 | 12 | start_init(m); | |
| 707 | 11 | style_ = style::empty; | |
| 708 | |||
| 709 |
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11 | prepped_ = make_array( |
| 710 | 1 + // header | ||
| 711 | 2); // out buffer pairs | ||
| 712 | |||
| 713 | 11 | out_init(); | |
| 714 | |||
| 715 |
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11 | if(!filter_) |
| 716 | 7 | out_finish(); | |
| 717 | |||
| 718 | 11 | prepped_.append({ m.ph_->cbuf, m.ph_->size }); | |
| 719 | 11 | more_input_ = false; | |
| 720 | 11 | } | |
| 721 | |||
| 722 | void | ||
| 723 | 24 | start_buffers( | |
| 724 | message_view_base const& m, | ||
| 725 | cbs_gen& cbs_gen) | ||
| 726 | { | ||
| 727 | // start_init() already called | ||
| 728 | 24 | style_ = style::buffers; | |
| 729 | 24 | cbs_gen_ = &cbs_gen; | |
| 730 | |||
| 731 |
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24 | if(!filter_) |
| 732 | { | ||
| 733 |
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8 | auto stats = cbs_gen_->stats(); |
| 734 | 8 | auto batch_size = clamp(stats.count, 16); | |
| 735 | |||
| 736 | ✗ | prepped_ = make_array( | |
| 737 | 1 + // header | ||
| 738 |
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8 | batch_size + // buffers |
| 739 |
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8 | (is_chunked_ ? 2 : 0)); // chunk header + final chunk |
| 740 | |||
| 741 | 8 | prepped_.append({ m.ph_->cbuf, m.ph_->size }); | |
| 742 | 8 | more_input_ = (batch_size != 0); | |
| 743 | |||
| 744 |
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8 | if(is_chunked_) |
| 745 | { | ||
| 746 |
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2 | if(!more_input_) |
| 747 | { | ||
| 748 | 1 | prepped_.append(final_chunk); | |
| 749 | } | ||
| 750 | else | ||
| 751 | { | ||
| 752 | 1 | auto h_len = chunk_header_len(stats.size); | |
| 753 | buffers::mutable_buffer mb( | ||
| 754 |
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1 | ws_.reserve_front(h_len), h_len); |
| 755 | 1 | write_chunk_header({ mb, {} }, stats.size); | |
| 756 | 1 | prepped_.append(mb); | |
| 757 | } | ||
| 758 | } | ||
| 759 | 8 | return; | |
| 760 | } | ||
| 761 | |||
| 762 | // filter | ||
| 763 | |||
| 764 |
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16 | prepped_ = make_array( |
| 765 | 1 + // header | ||
| 766 | 2); // out buffer pairs | ||
| 767 | |||
| 768 | 16 | out_init(); | |
| 769 | |||
| 770 | 16 | prepped_.append({ m.ph_->cbuf, m.ph_->size }); | |
| 771 | 16 | tmp_ = {}; | |
| 772 | 16 | more_input_ = true; | |
| 773 | } | ||
| 774 | |||
| 775 | void | ||
| 776 | 25 | start_source( | |
| 777 | message_view_base const& m, | ||
| 778 | source& source) | ||
| 779 | { | ||
| 780 | // start_init() already called | ||
| 781 | 25 | style_ = style::source; | |
| 782 | 25 | source_ = &source; | |
| 783 | |||
| 784 |
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25 | prepped_ = make_array( |
| 785 | 1 + // header | ||
| 786 | 2); // out buffer pairs | ||
| 787 | |||
| 788 |
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25 | if(filter_) |
| 789 | { | ||
| 790 | // TODO: smarter buffer distribution | ||
| 791 | 16 | auto const n = (ws_.size() - 1) / 2; | |
| 792 |
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16 | in_ = { ws_.reserve_front(n), n }; |
| 793 | } | ||
| 794 | |||
| 795 | 25 | out_init(); | |
| 796 | |||
| 797 | 25 | prepped_.append({ m.ph_->cbuf, m.ph_->size }); | |
| 798 | 25 | more_input_ = true; | |
| 799 | 25 | } | |
| 800 | |||
| 801 | stream | ||
| 802 | 23 | start_stream(message_view_base const& m) | |
| 803 | { | ||
| 804 | 23 | start_init(m); | |
| 805 | 23 | style_ = style::stream; | |
| 806 | |||
| 807 |
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23 | prepped_ = make_array( |
| 808 | 1 + // header | ||
| 809 | 2); // out buffer pairs | ||
| 810 | |||
| 811 |
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23 | if(filter_) |
| 812 | { | ||
| 813 | // TODO: smarter buffer distribution | ||
| 814 | 16 | auto const n = (ws_.size() - 1) / 2; | |
| 815 |
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16 | in_ = { ws_.reserve_front(n), n }; |
| 816 | } | ||
| 817 | |||
| 818 | 23 | out_init(); | |
| 819 | |||
| 820 | 23 | prepped_.append({ m.ph_->cbuf, m.ph_->size }); | |
| 821 | 23 | more_input_ = true; | |
| 822 | 23 | return stream{ this }; | |
| 823 | } | ||
| 824 | |||
| 825 | bool | ||
| 826 | 2479 | is_done() const noexcept | |
| 827 | { | ||
| 828 | 2479 | return state_ == state::start; | |
| 829 | } | ||
| 830 | |||
| 831 | detail::workspace& | ||
| 832 | 49 | ws() noexcept | |
| 833 | { | ||
| 834 | 49 | return ws_; | |
| 835 | } | ||
| 836 | |||
| 837 | private: | ||
| 838 | bool | ||
| 839 | 6123 | is_header_done() const noexcept | |
| 840 | { | ||
| 841 | 6123 | return state_ == state::body; | |
| 842 | } | ||
| 843 | |||
| 844 | detail::array_of_const_buffers | ||
| 845 | 83 | make_array(std::size_t n) | |
| 846 | { | ||
| 847 |
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83 | BOOST_ASSERT(n <= std::uint16_t(-1)); |
| 848 | |||
| 849 | return { | ||
| 850 | 83 | ws_.push_array(n, | |
| 851 | ✗ | buffers::const_buffer{}), | |
| 852 |
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83 | static_cast<std::uint16_t>(n) }; |
| 853 | } | ||
| 854 | |||
| 855 | void | ||
| 856 | 75 | out_init() | |
| 857 | { | ||
| 858 | // use all the remaining buffer | ||
| 859 | 75 | auto const n = ws_.size() - 1; | |
| 860 |
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75 | out_ = { ws_.reserve_front(n), n }; |
| 861 | 75 | chunk_header_len_ = | |
| 862 | 75 | chunk_header_len(out_.capacity()); | |
| 863 |
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75 | if(out_capacity() == 0) |
| 864 | ✗ | detail::throw_length_error(); | |
| 865 | 75 | } | |
| 866 | |||
| 867 | buffers::mutable_buffer_pair | ||
| 868 | 4903 | out_prepare() noexcept | |
| 869 | { | ||
| 870 | 4903 | auto mbp = out_.prepare(out_.capacity()); | |
| 871 |
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4903 | if(is_chunked_) |
| 872 | { | ||
| 873 | 2451 | buffers::trim_front( | |
| 874 | 2451 | mbp, chunk_header_len_); | |
| 875 | 2451 | buffers::trim_back( | |
| 876 | mbp, crlf_and_final_chunk.size()); | ||
| 877 | } | ||
| 878 | 4903 | return mbp; | |
| 879 | } | ||
| 880 | |||
| 881 | void | ||
| 882 | 4903 | out_commit( | |
| 883 | std::size_t n) noexcept | ||
| 884 | { | ||
| 885 |
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4903 | if(is_chunked_) |
| 886 | { | ||
| 887 |
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2451 | if(n == 0) |
| 888 | 1306 | return; | |
| 889 | |||
| 890 | 1145 | write_chunk_header(out_.prepare(chunk_header_len_), n); | |
| 891 | 1145 | out_.commit(chunk_header_len_); | |
| 892 | |||
| 893 | 1145 | out_.prepare(n); | |
| 894 | 1145 | out_.commit(n); | |
| 895 | |||
| 896 | 1145 | buffers::copy(out_.prepare(crlf.size()), crlf); | |
| 897 | 1145 | out_.commit(crlf.size()); | |
| 898 | } | ||
| 899 | else | ||
| 900 | { | ||
| 901 | 2452 | out_.commit(n); | |
| 902 | } | ||
| 903 | } | ||
| 904 | |||
| 905 | std::size_t | ||
| 906 | 6122 | out_capacity() const noexcept | |
| 907 | { | ||
| 908 |
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6122 | if(is_chunked_) |
| 909 | { | ||
| 910 | 3058 | auto const overhead = chunk_header_len_ + | |
| 911 | 3058 | crlf_and_final_chunk.size(); | |
| 912 |
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3058 | if(out_.capacity() < overhead) |
| 913 | 541 | return 0; | |
| 914 | 2517 | return out_.capacity() - overhead; | |
| 915 | } | ||
| 916 | 3064 | return out_.capacity(); | |
| 917 | } | ||
| 918 | |||
| 919 | void | ||
| 920 | 72 | out_finish() noexcept | |
| 921 | { | ||
| 922 |
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72 | if(is_chunked_) |
| 923 | { | ||
| 924 | 33 | buffers::copy( | |
| 925 | 33 | out_.prepare(final_chunk.size()), final_chunk); | |
| 926 | 33 | out_.commit(final_chunk.size()); | |
| 927 | } | ||
| 928 | 72 | } | |
| 929 | }; | ||
| 930 | |||
| 931 | //------------------------------------------------ | ||
| 932 | |||
| 933 | 24 | serializer:: | |
| 934 | 24 | serializer(const rts::context& ctx) | |
| 935 |
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24 | : impl_(new impl(ctx)) |
| 936 | { | ||
| 937 | // TODO: use a single allocation for | ||
| 938 | // impl and workspace buffer. | ||
| 939 | 24 | } | |
| 940 | |||
| 941 | 1 | serializer:: | |
| 942 | 1 | serializer(serializer&& other) noexcept | |
| 943 | 1 | : impl_(other.impl_) | |
| 944 | { | ||
| 945 | 1 | other.impl_ = nullptr; | |
| 946 | 1 | } | |
| 947 | |||
| 948 | 25 | serializer:: | |
| 949 | ~serializer() | ||
| 950 | { | ||
| 951 |
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25 | delete impl_; |
| 952 | 25 | } | |
| 953 | |||
| 954 | void | ||
| 955 | 9 | serializer:: | |
| 956 | reset() noexcept | ||
| 957 | { | ||
| 958 |
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9 | BOOST_ASSERT(impl_); |
| 959 | 9 | impl_->reset(); | |
| 960 | 9 | } | |
| 961 | |||
| 962 | void | ||
| 963 | 12 | serializer:: | |
| 964 | start(message_view_base const& m) | ||
| 965 | { | ||
| 966 |
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12 | BOOST_ASSERT(impl_); |
| 967 | 12 | impl_->start_empty(m); | |
| 968 | 11 | } | |
| 969 | |||
| 970 | auto | ||
| 971 | 23 | serializer:: | |
| 972 | start_stream( | ||
| 973 | message_view_base const& m) -> stream | ||
| 974 | { | ||
| 975 |
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23 | BOOST_ASSERT(impl_); |
| 976 | 23 | return impl_->start_stream(m); | |
| 977 | } | ||
| 978 | |||
| 979 | auto | ||
| 980 | 2426 | serializer:: | |
| 981 | prepare() -> | ||
| 982 | system::result<const_buffers_type> | ||
| 983 | { | ||
| 984 |
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2426 | BOOST_ASSERT(impl_); |
| 985 | 2426 | return impl_->prepare(); | |
| 986 | } | ||
| 987 | |||
| 988 | void | ||
| 989 | 3717 | serializer:: | |
| 990 | consume(std::size_t n) | ||
| 991 | { | ||
| 992 |
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3717 | BOOST_ASSERT(impl_); |
| 993 | 3717 | impl_->consume(n); | |
| 994 | 3716 | } | |
| 995 | |||
| 996 | bool | ||
| 997 | 2479 | serializer:: | |
| 998 | is_done() const noexcept | ||
| 999 | { | ||
| 1000 |
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2479 | BOOST_ASSERT(impl_); |
| 1001 | 2479 | return impl_->is_done(); | |
| 1002 | } | ||
| 1003 | |||
| 1004 | //------------------------------------------------ | ||
| 1005 | |||
| 1006 | detail::workspace& | ||
| 1007 | 49 | serializer:: | |
| 1008 | ws() | ||
| 1009 | { | ||
| 1010 |
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49 | BOOST_ASSERT(impl_); |
| 1011 | 49 | return impl_->ws(); | |
| 1012 | } | ||
| 1013 | |||
| 1014 | void | ||
| 1015 | 49 | serializer:: | |
| 1016 | start_init(message_view_base const& m) | ||
| 1017 | { | ||
| 1018 |
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49 | BOOST_ASSERT(impl_); |
| 1019 | 49 | impl_->start_init(m); | |
| 1020 | 49 | } | |
| 1021 | |||
| 1022 | void | ||
| 1023 | 24 | serializer:: | |
| 1024 | start_buffers( | ||
| 1025 | message_view_base const& m, | ||
| 1026 | cbs_gen& cbs_gen) | ||
| 1027 | { | ||
| 1028 |
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24 | BOOST_ASSERT(impl_); |
| 1029 | 24 | impl_->start_buffers(m, cbs_gen); | |
| 1030 | 24 | } | |
| 1031 | |||
| 1032 | void | ||
| 1033 | 25 | serializer:: | |
| 1034 | start_source( | ||
| 1035 | message_view_base const& m, | ||
| 1036 | source& source) | ||
| 1037 | { | ||
| 1038 |
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25 | BOOST_ASSERT(impl_); |
| 1039 | 25 | impl_->start_source(m, source); | |
| 1040 | 25 | } | |
| 1041 | |||
| 1042 | //------------------------------------------------ | ||
| 1043 | |||
| 1044 | std::size_t | ||
| 1045 | 1257 | serializer:: | |
| 1046 | stream:: | ||
| 1047 | capacity() const | ||
| 1048 | { | ||
| 1049 | // Precondition violation | ||
| 1050 |
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1257 | if(!is_open()) |
| 1051 | 1 | detail::throw_logic_error(); | |
| 1052 | |||
| 1053 |
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1256 | if(impl_->filter_) |
| 1054 | 1232 | return impl_->in_.capacity(); | |
| 1055 | |||
| 1056 | 24 | return impl_->out_capacity(); | |
| 1057 | } | ||
| 1058 | |||
| 1059 | auto | ||
| 1060 | 1239 | serializer:: | |
| 1061 | stream:: | ||
| 1062 | prepare() -> | ||
| 1063 | mutable_buffers_type | ||
| 1064 | { | ||
| 1065 | // Precondition violation | ||
| 1066 |
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1239 | if(!is_open()) |
| 1067 | 1 | detail::throw_logic_error(); | |
| 1068 | |||
| 1069 |
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1238 | if(impl_->filter_) |
| 1070 | 1232 | return impl_->in_.prepare( | |
| 1071 | 2464 | impl_->in_.capacity()); | |
| 1072 | |||
| 1073 | 6 | return impl_->out_prepare(); | |
| 1074 | } | ||
| 1075 | |||
| 1076 | void | ||
| 1077 | 1240 | serializer:: | |
| 1078 | stream:: | ||
| 1079 | commit(std::size_t n) | ||
| 1080 | { | ||
| 1081 | // Precondition violation | ||
| 1082 |
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1240 | if(!is_open()) |
| 1083 | 1 | detail::throw_logic_error(); | |
| 1084 | |||
| 1085 | // Precondition violation | ||
| 1086 |
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1239 | if(n > capacity()) |
| 1087 | 1 | detail::throw_invalid_argument(); | |
| 1088 | |||
| 1089 |
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1238 | if(impl_->filter_) |
| 1090 | 1232 | return impl_->in_.commit(n); | |
| 1091 | |||
| 1092 | 6 | impl_->out_commit(n); | |
| 1093 | } | ||
| 1094 | |||
| 1095 | void | ||
| 1096 | 47 | serializer:: | |
| 1097 | stream:: | ||
| 1098 | close() noexcept | ||
| 1099 | { | ||
| 1100 |
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47 | if(!is_open()) |
| 1101 | 24 | return; // no-op; | |
| 1102 | |||
| 1103 |
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23 | if(!impl_->filter_) |
| 1104 | 7 | impl_->out_finish(); | |
| 1105 | |||
| 1106 | 23 | impl_->more_input_ = false; | |
| 1107 | 23 | impl_ = nullptr; | |
| 1108 | } | ||
| 1109 | |||
| 1110 | } // http_proto | ||
| 1111 | } // boost | ||
| 1112 |