| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2021 Vinnie Falco (vinnie.falco@gmail.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 | // Official repository: https://github.com/CPPAlliance/http_proto | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_HTTP_PROTO_SERVICE_IMPL_ZLIB_SERVICE_IPP | ||
| 11 | #define BOOST_HTTP_PROTO_SERVICE_IMPL_ZLIB_SERVICE_IPP | ||
| 12 | |||
| 13 | #include <boost/http_proto/service/zlib_service.hpp> | ||
| 14 | #include "zlib.h" | ||
| 15 | |||
| 16 | namespace boost { | ||
| 17 | namespace http_proto { | ||
| 18 | namespace zlib { | ||
| 19 | namespace detail { | ||
| 20 | |||
| 21 | /* | ||
| 22 | DEFLATE Compressed Data Format Specification version 1.3 | ||
| 23 | https://www.rfc-editor.org/rfc/rfc1951 | ||
| 24 | */ | ||
| 25 | |||
| 26 | //------------------------------------------------ | ||
| 27 | |||
| 28 | enum class error | ||
| 29 | { | ||
| 30 | ok = 0, | ||
| 31 | stream_end = 1, | ||
| 32 | need_dict = 2, | ||
| 33 | errno_ = -1, | ||
| 34 | stream_err = -2, | ||
| 35 | data_err = -3, | ||
| 36 | mem_err = -4, | ||
| 37 | buf_err = -5, | ||
| 38 | version_err = -6 | ||
| 39 | }; | ||
| 40 | |||
| 41 | error_code | ||
| 42 | 4 | make_error_code( | |
| 43 | error ev) noexcept | ||
| 44 | { | ||
| 45 | struct cat_t : error_category | ||
| 46 | { | ||
| 47 | 1 | cat_t() noexcept | |
| 48 | 1 | : error_category( | |
| 49 | 1 | 0xe6c6d0215d1d6e22) | |
| 50 | { | ||
| 51 | 1 | } | |
| 52 | |||
| 53 | const char* | ||
| 54 | ✗ | name() const noexcept override | |
| 55 | { | ||
| 56 | ✗ | return "boost.http.proto.zlib"; | |
| 57 | } | ||
| 58 | |||
| 59 | std::string | ||
| 60 | ✗ | message(int ev) const override | |
| 61 | { | ||
| 62 | ✗ | switch(static_cast<error>(ev)) | |
| 63 | { | ||
| 64 | ✗ | case error::ok: return "Z_OK"; | |
| 65 | ✗ | case error::stream_end: return "Z_STREAM_END"; | |
| 66 | ✗ | case error::need_dict: return "Z_NEED_DICT"; | |
| 67 | ✗ | case error::errno_: return "Z_ERRNO"; | |
| 68 | ✗ | case error::stream_err: return "Z_STREAM_ERROR"; | |
| 69 | ✗ | case error::data_err: return "Z_DATA_ERROR"; | |
| 70 | ✗ | case error::mem_err: return "Z_MEM_ERROR"; | |
| 71 | ✗ | case error::buf_err: return "Z_BUF_ERROR"; | |
| 72 | ✗ | case error::version_err: return "Z_VERSION_ERROR"; | |
| 73 | ✗ | default: | |
| 74 | ✗ | return "unknown"; | |
| 75 | } | ||
| 76 | } | ||
| 77 | }; | ||
| 78 |
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4 | static cat_t const cat{}; |
| 79 | return error_code{static_cast< | ||
| 80 | std::underlying_type< | ||
| 81 | 4 | error>::type>(ev), cat}; | |
| 82 | } | ||
| 83 | } // detail | ||
| 84 | } // zlib | ||
| 85 | } // http_proto | ||
| 86 | namespace system { | ||
| 87 | template<> | ||
| 88 | struct is_error_code_enum< | ||
| 89 | ::boost::http_proto::zlib::detail::error> | ||
| 90 | { | ||
| 91 | static bool const value = true; | ||
| 92 | }; | ||
| 93 | } // system | ||
| 94 | namespace http_proto { | ||
| 95 | namespace zlib { | ||
| 96 | namespace detail { | ||
| 97 | |||
| 98 | //------------------------------------------------ | ||
| 99 | |||
| 100 | // probes memory usage for a config | ||
| 101 | class probe | ||
| 102 | { | ||
| 103 | public: | ||
| 104 | explicit | ||
| 105 | 1 | probe() noexcept | |
| 106 | 1 | { | |
| 107 | 1 | zs_.zalloc = &zalloc; | |
| 108 | 1 | zs_.zfree = &zfree; | |
| 109 | 1 | zs_.opaque = this; | |
| 110 | 1 | } | |
| 111 | |||
| 112 | system::result<std::size_t> | ||
| 113 | 1 | deflate_init( | |
| 114 | int level) | ||
| 115 | { | ||
| 116 | 1 | n_ = 0; | |
| 117 | 1 | system::error_code ec; | |
| 118 | ec = static_cast<error>( | ||
| 119 |
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1 | deflateInit(&zs_, level)); |
| 120 |
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1 | if(ec.failed()) |
| 121 | ✗ | return ec; | |
| 122 | 1 | Bytef tmp[24]{}; | |
| 123 | 1 | zs_.next_in = &tmp[0]; | |
| 124 | 1 | zs_.avail_in = 1; | |
| 125 | 1 | zs_.next_out = &tmp[1]; | |
| 126 | 1 | zs_.avail_out = 23; | |
| 127 | ec = static_cast<error>( | ||
| 128 |
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1 | deflate(&zs_, |
| 129 | 1 | Z_FINISH)); | |
| 130 |
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2 | if( ec.failed() && |
| 131 |
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2 | ec != error::stream_end) |
| 132 | ✗ | return ec; | |
| 133 | ec = static_cast<error>( | ||
| 134 |
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1 | deflateEnd(&zs_)); |
| 135 |
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1 | if(ec.failed()) |
| 136 | ✗ | return ec; | |
| 137 | 1 | return n_; | |
| 138 | } | ||
| 139 | |||
| 140 | system::result<std::size_t> | ||
| 141 | deflate_init2( | ||
| 142 | int level, | ||
| 143 | int method, | ||
| 144 | int windowBits, | ||
| 145 | int memLevel, | ||
| 146 | int strategy) | ||
| 147 | { | ||
| 148 | n_ = 0; | ||
| 149 | system::error_code ec; | ||
| 150 | ec = static_cast<error>( | ||
| 151 | deflateInit2(&zs_, | ||
| 152 | level, | ||
| 153 | method, | ||
| 154 | windowBits, | ||
| 155 | memLevel, | ||
| 156 | strategy)); | ||
| 157 | if(ec.failed()) | ||
| 158 | return ec; | ||
| 159 | Bytef tmp[2]; | ||
| 160 | zs_.next_in = &tmp[0]; | ||
| 161 | zs_.avail_in = 0; | ||
| 162 | zs_.next_out = &tmp[1]; | ||
| 163 | zs_.avail_out = 0; | ||
| 164 | ec = static_cast<error>( | ||
| 165 | deflate(&zs_, | ||
| 166 | Z_FULL_FLUSH)); | ||
| 167 | if(ec.failed()) | ||
| 168 | return ec; | ||
| 169 | ec = static_cast<error>( | ||
| 170 | deflateEnd(&zs_)); | ||
| 171 | if(ec.failed()) | ||
| 172 | return ec; | ||
| 173 | return n_; | ||
| 174 | } | ||
| 175 | |||
| 176 | private: | ||
| 177 | 5 | static void* zalloc(void* opaque, | |
| 178 | uInt num, uInt size) | ||
| 179 | { | ||
| 180 | 5 | auto& self = | |
| 181 | *reinterpret_cast< | ||
| 182 | probe*>(opaque); | ||
| 183 | 5 | self.n_ += num * size; | |
| 184 | 5 | return new char[num * size]; | |
| 185 | } | ||
| 186 | |||
| 187 | 5 | static void zfree( | |
| 188 | void*, void* address) | ||
| 189 | { | ||
| 190 | delete[] reinterpret_cast< | ||
| 191 |
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5 | char*>(address); |
| 192 | 5 | } | |
| 193 | |||
| 194 | z_stream_s zs_{}; | ||
| 195 | std::size_t n_ = 0; | ||
| 196 | }; | ||
| 197 | |||
| 198 | //------------------------------------------------ | ||
| 199 | |||
| 200 | struct | ||
| 201 | deflate_decoder_service_impl | ||
| 202 | : deflate_decoder_service | ||
| 203 | { | ||
| 204 | using key_type = | ||
| 205 | deflate_decoder_service; | ||
| 206 | |||
| 207 | explicit | ||
| 208 | 1 | deflate_decoder_service_impl( | |
| 209 | context& ctx, | ||
| 210 | config const& cfg) | ||
| 211 | 1 | : cfg_(cfg) | |
| 212 | { | ||
| 213 | (void)ctx; | ||
| 214 | 1 | probe p; | |
| 215 | ✗ | auto n0 = p.deflate_init( | |
| 216 |
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1 | Z_DEFAULT_COMPRESSION).value(); |
| 217 | (void)n0; | ||
| 218 | 1 | } | |
| 219 | |||
| 220 | private: | ||
| 221 | config cfg_; | ||
| 222 | |||
| 223 | config const& | ||
| 224 | ✗ | get_config() const noexcept override | |
| 225 | { | ||
| 226 | ✗ | return cfg_; | |
| 227 | } | ||
| 228 | |||
| 229 | std::size_t | ||
| 230 | ✗ | space_needed() const noexcept override | |
| 231 | { | ||
| 232 | ✗ | return 0; | |
| 233 | } | ||
| 234 | |||
| 235 | buffers::filter& | ||
| 236 | ✗ | make_filter(http_proto::detail::workspace& ws) const override | |
| 237 | { | ||
| 238 | buffers::filter* p; | ||
| 239 | (void)ws; | ||
| 240 | ✗ | p = nullptr; | |
| 241 | ✗ | return *p; | |
| 242 | } | ||
| 243 | }; | ||
| 244 | |||
| 245 | } // detail | ||
| 246 | |||
| 247 | void | ||
| 248 | 1 | deflate_decoder_service:: | |
| 249 | config:: | ||
| 250 | install(context& ctx) | ||
| 251 | { | ||
| 252 | ctx.make_service< | ||
| 253 | 1 | detail::deflate_decoder_service_impl>(*this); | |
| 254 | 1 | } | |
| 255 | |||
| 256 | } // zlib | ||
| 257 | } // http_proto | ||
| 258 | } // boost | ||
| 259 | |||
| 260 | #endif | ||
| 261 |