| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/cppalliance/http_proto | ||
| 8 | // | ||
| 9 | |||
| 10 | #include <boost/http_proto/server/cors.hpp> | ||
| 11 | #include <utility> | ||
| 12 | |||
| 13 | namespace boost { | ||
| 14 | namespace http_proto { | ||
| 15 | |||
| 16 | ✗ | cors:: | |
| 17 | cors( | ||
| 18 | ✗ | cors_options options) noexcept | |
| 19 | ✗ | : options_(std::move(options)) | |
| 20 | { | ||
| 21 | // VFALCO TODO Validate the strings in options against RFC | ||
| 22 | ✗ | } | |
| 23 | |||
| 24 | namespace { | ||
| 25 | |||
| 26 | struct Vary | ||
| 27 | { | ||
| 28 | ✗ | Vary(Response& res) | |
| 29 | ✗ | : res_(res) | |
| 30 | { | ||
| 31 | ✗ | } | |
| 32 | |||
| 33 | ✗ | void set(field f, core::string_view s) | |
| 34 | { | ||
| 35 | ✗ | res_.message.set(f, s); | |
| 36 | ✗ | } | |
| 37 | |||
| 38 | ✗ | void append(field f, core::string_view v) | |
| 39 | { | ||
| 40 | ✗ | auto it = res_.message.find(f); | |
| 41 | ✗ | if (it != res_.message.end()) | |
| 42 | { | ||
| 43 | ✗ | std::string s = it->value; | |
| 44 | ✗ | s += ", "; | |
| 45 | ✗ | s += v; | |
| 46 | ✗ | res_.message.set(it, s); | |
| 47 | ✗ | } | |
| 48 | else | ||
| 49 | { | ||
| 50 | ✗ | res_.message.set(f, v); | |
| 51 | } | ||
| 52 | ✗ | } | |
| 53 | |||
| 54 | private: | ||
| 55 | Response& res_; | ||
| 56 | std::string v_; | ||
| 57 | }; | ||
| 58 | |||
| 59 | } // (anon) | ||
| 60 | |||
| 61 | // Access-Control-Allow-Origin | ||
| 62 | ✗ | static void setOrigin( | |
| 63 | Vary& v, | ||
| 64 | Request const&, | ||
| 65 | cors_options const& options) | ||
| 66 | { | ||
| 67 | ✗ | if( options.origin.empty() || | |
| 68 | ✗ | options.origin == "*") | |
| 69 | { | ||
| 70 | ✗ | v.set(field::access_control_allow_origin, "*"); | |
| 71 | ✗ | return; | |
| 72 | } | ||
| 73 | |||
| 74 | ✗ | v.set( | |
| 75 | field::access_control_allow_origin, | ||
| 76 | ✗ | options.origin); | |
| 77 | ✗ | v.append(field::vary, to_string(field::origin)); | |
| 78 | } | ||
| 79 | |||
| 80 | // Access-Control-Allow-Methods | ||
| 81 | ✗ | static void setMethods( | |
| 82 | Vary& v, | ||
| 83 | cors_options const& options) | ||
| 84 | { | ||
| 85 | ✗ | if(! options.methods.empty()) | |
| 86 | { | ||
| 87 | ✗ | v.set( | |
| 88 | field::access_control_allow_methods, | ||
| 89 | ✗ | options.methods); | |
| 90 | ✗ | return; | |
| 91 | } | ||
| 92 | ✗ | v.set( | |
| 93 | field::access_control_allow_methods, | ||
| 94 | "GET,HEAD,PUT,PATCH,POST,DELETE"); | ||
| 95 | } | ||
| 96 | |||
| 97 | // Access-Control-Allow-Credentials | ||
| 98 | ✗ | static void setCredentials( | |
| 99 | Vary& v, | ||
| 100 | cors_options const& options) | ||
| 101 | { | ||
| 102 | ✗ | if(! options.credentials) | |
| 103 | ✗ | return; | |
| 104 | ✗ | v.set( | |
| 105 | field::access_control_allow_credentials, | ||
| 106 | "true"); | ||
| 107 | } | ||
| 108 | |||
| 109 | // Access-Control-Allowed-Headers | ||
| 110 | ✗ | static void setAllowedHeaders( | |
| 111 | Vary& v, | ||
| 112 | Request const& req, | ||
| 113 | cors_options const& options) | ||
| 114 | { | ||
| 115 | ✗ | if(! options.allowedHeaders.empty()) | |
| 116 | { | ||
| 117 | ✗ | v.set( | |
| 118 | field::access_control_allow_headers, | ||
| 119 | ✗ | options.allowedHeaders); | |
| 120 | ✗ | return; | |
| 121 | } | ||
| 122 | ✗ | auto s = req.message.value_or( | |
| 123 | field::access_control_request_headers, ""); | ||
| 124 | ✗ | if(! s.empty()) | |
| 125 | { | ||
| 126 | ✗ | v.set( | |
| 127 | field::access_control_allow_headers, | ||
| 128 | s); | ||
| 129 | ✗ | v.append(field::vary, s); | |
| 130 | } | ||
| 131 | } | ||
| 132 | |||
| 133 | // Access-Control-Expose-Headers | ||
| 134 | ✗ | static void setExposeHeaders( | |
| 135 | Vary& v, | ||
| 136 | cors_options const& options) | ||
| 137 | { | ||
| 138 | ✗ | if(options.exposedHeaders.empty()) | |
| 139 | ✗ | return; | |
| 140 | ✗ | v.set( | |
| 141 | field::access_control_expose_headers, | ||
| 142 | ✗ | options.exposedHeaders); | |
| 143 | } | ||
| 144 | |||
| 145 | // Access-Control-Max-Age | ||
| 146 | ✗ | static void setMaxAge( | |
| 147 | Vary& v, | ||
| 148 | cors_options const& options) | ||
| 149 | { | ||
| 150 | ✗ | if(options.max_age.count() == 0) | |
| 151 | ✗ | return; | |
| 152 | ✗ | v.set( | |
| 153 | field::access_control_max_age, | ||
| 154 | ✗ | std::to_string( | |
| 155 | options.max_age.count())); | ||
| 156 | } | ||
| 157 | |||
| 158 | route_result | ||
| 159 | ✗ | cors:: | |
| 160 | operator()( | ||
| 161 | Request& req, | ||
| 162 | Response& res) const | ||
| 163 | { | ||
| 164 | ✗ | Vary v(res); | |
| 165 | ✗ | if(req.message.method() == | |
| 166 | method::options) | ||
| 167 | { | ||
| 168 | // preflight | ||
| 169 | ✗ | setOrigin(v, req, options_); | |
| 170 | ✗ | setMethods(v, options_); | |
| 171 | ✗ | setCredentials(v, options_); | |
| 172 | ✗ | setAllowedHeaders(v, req, options_); | |
| 173 | ✗ | setMaxAge(v, options_); | |
| 174 | ✗ | setExposeHeaders(v, options_); | |
| 175 | |||
| 176 | ✗ | if(options_.preFligthContinue) | |
| 177 | ✗ | return route::next; | |
| 178 | // Safari and others need this for 204 or may hang | ||
| 179 | ✗ | res.message.set_status(options_.result); | |
| 180 | ✗ | res.message.set_content_length(0); | |
| 181 | ✗ | res.serializer.start(res.message); | |
| 182 | ✗ | return route::send; | |
| 183 | } | ||
| 184 | // actual response | ||
| 185 | ✗ | setOrigin(v, req, options_); | |
| 186 | ✗ | setCredentials(v, options_); | |
| 187 | ✗ | setExposeHeaders(v, options_); | |
| 188 | ✗ | return route::next; | |
| 189 | ✗ | } | |
| 190 | |||
| 191 | } // http_proto | ||
| 192 | } // boost | ||
| 193 |