001/* 002 * Copyright (C) 2011 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 005 * in compliance with the License. You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software distributed under the License 010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 011 * or implied. See the License for the specific language governing permissions and limitations under 012 * the License. 013 */ 014 015package com.google.common.net; 016 017import com.google.common.annotations.GwtCompatible; 018 019/** 020 * Contains constant definitions for the HTTP header field names. See: 021 * 022 * <ul> 023 * <li><a href="http://www.ietf.org/rfc/rfc2109.txt">RFC 2109</a> 024 * <li><a href="http://www.ietf.org/rfc/rfc2183.txt">RFC 2183</a> 025 * <li><a href="http://www.ietf.org/rfc/rfc2616.txt">RFC 2616</a> 026 * <li><a href="http://www.ietf.org/rfc/rfc2965.txt">RFC 2965</a> 027 * <li><a href="http://www.ietf.org/rfc/rfc5988.txt">RFC 5988</a> 028 * </ul> 029 * 030 * @author Kurt Alfred Kluever 031 * @since 11.0 032 */ 033@GwtCompatible 034@ElementTypesAreNonnullByDefault 035public final class HttpHeaders { 036 private HttpHeaders() {} 037 038 // HTTP Request and Response header fields 039 040 /** The HTTP {@code Cache-Control} header field name. */ 041 public static final String CACHE_CONTROL = "Cache-Control"; 042 /** The HTTP {@code Content-Length} header field name. */ 043 public static final String CONTENT_LENGTH = "Content-Length"; 044 /** The HTTP {@code Content-Type} header field name. */ 045 public static final String CONTENT_TYPE = "Content-Type"; 046 /** The HTTP {@code Date} header field name. */ 047 public static final String DATE = "Date"; 048 /** The HTTP {@code Pragma} header field name. */ 049 public static final String PRAGMA = "Pragma"; 050 /** The HTTP {@code Via} header field name. */ 051 public static final String VIA = "Via"; 052 /** The HTTP {@code Warning} header field name. */ 053 public static final String WARNING = "Warning"; 054 055 // HTTP Request header fields 056 057 /** The HTTP {@code Accept} header field name. */ 058 public static final String ACCEPT = "Accept"; 059 /** The HTTP {@code Accept-Charset} header field name. */ 060 public static final String ACCEPT_CHARSET = "Accept-Charset"; 061 /** The HTTP {@code Accept-Encoding} header field name. */ 062 public static final String ACCEPT_ENCODING = "Accept-Encoding"; 063 /** The HTTP {@code Accept-Language} header field name. */ 064 public static final String ACCEPT_LANGUAGE = "Accept-Language"; 065 /** The HTTP {@code Access-Control-Request-Headers} header field name. */ 066 public static final String ACCESS_CONTROL_REQUEST_HEADERS = "Access-Control-Request-Headers"; 067 /** The HTTP {@code Access-Control-Request-Method} header field name. */ 068 public static final String ACCESS_CONTROL_REQUEST_METHOD = "Access-Control-Request-Method"; 069 /** The HTTP {@code Authorization} header field name. */ 070 public static final String AUTHORIZATION = "Authorization"; 071 /** The HTTP {@code Connection} header field name. */ 072 public static final String CONNECTION = "Connection"; 073 /** The HTTP {@code Cookie} header field name. */ 074 public static final String COOKIE = "Cookie"; 075 /** 076 * The HTTP <a href="https://fetch.spec.whatwg.org/#cross-origin-resource-policy-header">{@code 077 * Cross-Origin-Resource-Policy}</a> header field name. 078 * 079 * @since 28.0 080 */ 081 public static final String CROSS_ORIGIN_RESOURCE_POLICY = "Cross-Origin-Resource-Policy"; 082 /** 083 * The HTTP <a href="https://tools.ietf.org/html/rfc8470">{@code Early-Data}</a> header field 084 * name. 085 * 086 * @since 27.0 087 */ 088 public static final String EARLY_DATA = "Early-Data"; 089 /** The HTTP {@code Expect} header field name. */ 090 public static final String EXPECT = "Expect"; 091 /** The HTTP {@code From} header field name. */ 092 public static final String FROM = "From"; 093 /** 094 * The HTTP <a href="https://tools.ietf.org/html/rfc7239">{@code Forwarded}</a> header field name. 095 * 096 * @since 20.0 097 */ 098 public static final String FORWARDED = "Forwarded"; 099 /** 100 * The HTTP {@code Follow-Only-When-Prerender-Shown} header field name. 101 * 102 * @since 17.0 103 */ 104 public static final String FOLLOW_ONLY_WHEN_PRERENDER_SHOWN = "Follow-Only-When-Prerender-Shown"; 105 /** The HTTP {@code Host} header field name. */ 106 public static final String HOST = "Host"; 107 /** 108 * The HTTP <a href="https://tools.ietf.org/html/rfc7540#section-3.2.1">{@code HTTP2-Settings} 109 * </a> header field name. 110 * 111 * @since 24.0 112 */ 113 public static final String HTTP2_SETTINGS = "HTTP2-Settings"; 114 /** The HTTP {@code If-Match} header field name. */ 115 public static final String IF_MATCH = "If-Match"; 116 /** The HTTP {@code If-Modified-Since} header field name. */ 117 public static final String IF_MODIFIED_SINCE = "If-Modified-Since"; 118 /** The HTTP {@code If-None-Match} header field name. */ 119 public static final String IF_NONE_MATCH = "If-None-Match"; 120 /** The HTTP {@code If-Range} header field name. */ 121 public static final String IF_RANGE = "If-Range"; 122 /** The HTTP {@code If-Unmodified-Since} header field name. */ 123 public static final String IF_UNMODIFIED_SINCE = "If-Unmodified-Since"; 124 /** The HTTP {@code Last-Event-ID} header field name. */ 125 public static final String LAST_EVENT_ID = "Last-Event-ID"; 126 /** The HTTP {@code Max-Forwards} header field name. */ 127 public static final String MAX_FORWARDS = "Max-Forwards"; 128 /** The HTTP {@code Origin} header field name. */ 129 public static final String ORIGIN = "Origin"; 130 /** 131 * The HTTP <a href="https://github.com/WICG/origin-isolation">{@code Origin-Isolation}</a> header 132 * field name. 133 * 134 * @since 30.1 135 */ 136 public static final String ORIGIN_ISOLATION = "Origin-Isolation"; 137 /** The HTTP {@code Proxy-Authorization} header field name. */ 138 public static final String PROXY_AUTHORIZATION = "Proxy-Authorization"; 139 /** The HTTP {@code Range} header field name. */ 140 public static final String RANGE = "Range"; 141 /** The HTTP {@code Referer} header field name. */ 142 public static final String REFERER = "Referer"; 143 /** 144 * The HTTP <a href="https://www.w3.org/TR/referrer-policy/">{@code Referrer-Policy}</a> header 145 * field name. 146 * 147 * @since 23.4 148 */ 149 public static final String REFERRER_POLICY = "Referrer-Policy"; 150 151 /** 152 * Values for the <a href="https://www.w3.org/TR/referrer-policy/">{@code Referrer-Policy}</a> 153 * header. 154 * 155 * @since 23.4 156 */ 157 public static final class ReferrerPolicyValues { 158 private ReferrerPolicyValues() {} 159 160 public static final String NO_REFERRER = "no-referrer"; 161 public static final String NO_REFFERER_WHEN_DOWNGRADE = "no-referrer-when-downgrade"; 162 public static final String SAME_ORIGIN = "same-origin"; 163 public static final String ORIGIN = "origin"; 164 public static final String STRICT_ORIGIN = "strict-origin"; 165 public static final String ORIGIN_WHEN_CROSS_ORIGIN = "origin-when-cross-origin"; 166 public static final String STRICT_ORIGIN_WHEN_CROSS_ORIGIN = "strict-origin-when-cross-origin"; 167 public static final String UNSAFE_URL = "unsafe-url"; 168 } 169 170 /** 171 * The HTTP <a href="https://www.w3.org/TR/service-workers/#update-algorithm">{@code 172 * Service-Worker}</a> header field name. 173 * 174 * @since 20.0 175 */ 176 public static final String SERVICE_WORKER = "Service-Worker"; 177 /** The HTTP {@code TE} header field name. */ 178 public static final String TE = "TE"; 179 /** The HTTP {@code Upgrade} header field name. */ 180 public static final String UPGRADE = "Upgrade"; 181 /** 182 * The HTTP <a href="https://w3c.github.io/webappsec-upgrade-insecure-requests/#preference">{@code 183 * Upgrade-Insecure-Requests}</a> header field name. 184 * 185 * @since 28.1 186 */ 187 public static final String UPGRADE_INSECURE_REQUESTS = "Upgrade-Insecure-Requests"; 188 189 /** The HTTP {@code User-Agent} header field name. */ 190 public static final String USER_AGENT = "User-Agent"; 191 192 // HTTP Response header fields 193 194 /** The HTTP {@code Accept-Ranges} header field name. */ 195 public static final String ACCEPT_RANGES = "Accept-Ranges"; 196 /** The HTTP {@code Access-Control-Allow-Headers} header field name. */ 197 public static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers"; 198 /** The HTTP {@code Access-Control-Allow-Methods} header field name. */ 199 public static final String ACCESS_CONTROL_ALLOW_METHODS = "Access-Control-Allow-Methods"; 200 /** The HTTP {@code Access-Control-Allow-Origin} header field name. */ 201 public static final String ACCESS_CONTROL_ALLOW_ORIGIN = "Access-Control-Allow-Origin"; 202 /** 203 * The HTTP <a href="https://wicg.github.io/private-network-access/#headers">{@code 204 * Access-Control-Allow-Private-Network}</a> header field name. 205 * 206 * @since 31.1 207 */ 208 public static final String ACCESS_CONTROL_ALLOW_PRIVATE_NETWORK = 209 "Access-Control-Allow-Private-Network"; 210 /** The HTTP {@code Access-Control-Allow-Credentials} header field name. */ 211 public static final String ACCESS_CONTROL_ALLOW_CREDENTIALS = "Access-Control-Allow-Credentials"; 212 /** The HTTP {@code Access-Control-Expose-Headers} header field name. */ 213 public static final String ACCESS_CONTROL_EXPOSE_HEADERS = "Access-Control-Expose-Headers"; 214 /** The HTTP {@code Access-Control-Max-Age} header field name. */ 215 public static final String ACCESS_CONTROL_MAX_AGE = "Access-Control-Max-Age"; 216 /** The HTTP {@code Age} header field name. */ 217 public static final String AGE = "Age"; 218 /** The HTTP {@code Allow} header field name. */ 219 public static final String ALLOW = "Allow"; 220 /** The HTTP {@code Content-Disposition} header field name. */ 221 public static final String CONTENT_DISPOSITION = "Content-Disposition"; 222 /** The HTTP {@code Content-Encoding} header field name. */ 223 public static final String CONTENT_ENCODING = "Content-Encoding"; 224 /** The HTTP {@code Content-Language} header field name. */ 225 public static final String CONTENT_LANGUAGE = "Content-Language"; 226 /** The HTTP {@code Content-Location} header field name. */ 227 public static final String CONTENT_LOCATION = "Content-Location"; 228 /** The HTTP {@code Content-MD5} header field name. */ 229 public static final String CONTENT_MD5 = "Content-MD5"; 230 /** The HTTP {@code Content-Range} header field name. */ 231 public static final String CONTENT_RANGE = "Content-Range"; 232 /** 233 * The HTTP <a href="http://w3.org/TR/CSP/#content-security-policy-header-field">{@code 234 * Content-Security-Policy}</a> header field name. 235 * 236 * @since 15.0 237 */ 238 public static final String CONTENT_SECURITY_POLICY = "Content-Security-Policy"; 239 /** 240 * The HTTP <a href="http://w3.org/TR/CSP/#content-security-policy-report-only-header-field"> 241 * {@code Content-Security-Policy-Report-Only}</a> header field name. 242 * 243 * @since 15.0 244 */ 245 public static final String CONTENT_SECURITY_POLICY_REPORT_ONLY = 246 "Content-Security-Policy-Report-Only"; 247 /** 248 * The HTTP nonstandard {@code X-Content-Security-Policy} header field name. It was introduced in 249 * <a href="https://www.w3.org/TR/2011/WD-CSP-20111129/">CSP v.1</a> and used by the Firefox until 250 * version 23 and the Internet Explorer version 10. Please, use {@link #CONTENT_SECURITY_POLICY} 251 * to pass the CSP. 252 * 253 * @since 20.0 254 */ 255 public static final String X_CONTENT_SECURITY_POLICY = "X-Content-Security-Policy"; 256 /** 257 * The HTTP nonstandard {@code X-Content-Security-Policy-Report-Only} header field name. It was 258 * introduced in <a href="https://www.w3.org/TR/2011/WD-CSP-20111129/">CSP v.1</a> and used by the 259 * Firefox until version 23 and the Internet Explorer version 10. Please, use {@link 260 * #CONTENT_SECURITY_POLICY_REPORT_ONLY} to pass the CSP. 261 * 262 * @since 20.0 263 */ 264 public static final String X_CONTENT_SECURITY_POLICY_REPORT_ONLY = 265 "X-Content-Security-Policy-Report-Only"; 266 /** 267 * The HTTP nonstandard {@code X-WebKit-CSP} header field name. It was introduced in <a 268 * href="https://www.w3.org/TR/2011/WD-CSP-20111129/">CSP v.1</a> and used by the Chrome until 269 * version 25. Please, use {@link #CONTENT_SECURITY_POLICY} to pass the CSP. 270 * 271 * @since 20.0 272 */ 273 public static final String X_WEBKIT_CSP = "X-WebKit-CSP"; 274 /** 275 * The HTTP nonstandard {@code X-WebKit-CSP-Report-Only} header field name. It was introduced in 276 * <a href="https://www.w3.org/TR/2011/WD-CSP-20111129/">CSP v.1</a> and used by the Chrome until 277 * version 25. Please, use {@link #CONTENT_SECURITY_POLICY_REPORT_ONLY} to pass the CSP. 278 * 279 * @since 20.0 280 */ 281 public static final String X_WEBKIT_CSP_REPORT_ONLY = "X-WebKit-CSP-Report-Only"; 282 /** 283 * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP">{@code 284 * Cross-Origin-Embedder-Policy}</a> header field name. 285 * 286 * @since 30.0 287 */ 288 public static final String CROSS_ORIGIN_EMBEDDER_POLICY = "Cross-Origin-Embedder-Policy"; 289 /** 290 * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP-RO">{@code 291 * Cross-Origin-Embedder-Policy-Report-Only}</a> header field name. 292 * 293 * @since 30.0 294 */ 295 public static final String CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY = 296 "Cross-Origin-Embedder-Policy-Report-Only"; 297 /** 298 * The HTTP Cross-Origin-Opener-Policy header field name. 299 * 300 * @since 28.2 301 */ 302 public static final String CROSS_ORIGIN_OPENER_POLICY = "Cross-Origin-Opener-Policy"; 303 /** The HTTP {@code ETag} header field name. */ 304 public static final String ETAG = "ETag"; 305 /** The HTTP {@code Expires} header field name. */ 306 public static final String EXPIRES = "Expires"; 307 /** The HTTP {@code Last-Modified} header field name. */ 308 public static final String LAST_MODIFIED = "Last-Modified"; 309 /** The HTTP {@code Link} header field name. */ 310 public static final String LINK = "Link"; 311 /** The HTTP {@code Location} header field name. */ 312 public static final String LOCATION = "Location"; 313 /** 314 * The HTTP {@code Keep-Alive} header field name. 315 * 316 * @since 31.0 317 */ 318 public static final String KEEP_ALIVE = "Keep-Alive"; 319 /** 320 * The HTTP <a href="https://googlechrome.github.io/OriginTrials/#header">{@code Origin-Trial}</a> 321 * header field name. 322 * 323 * @since 27.1 324 */ 325 public static final String ORIGIN_TRIAL = "Origin-Trial"; 326 /** The HTTP {@code P3P} header field name. Limited browser support. */ 327 public static final String P3P = "P3P"; 328 /** The HTTP {@code Proxy-Authenticate} header field name. */ 329 public static final String PROXY_AUTHENTICATE = "Proxy-Authenticate"; 330 /** The HTTP {@code Refresh} header field name. Non-standard header supported by most browsers. */ 331 public static final String REFRESH = "Refresh"; 332 /** 333 * The HTTP <a href="https://www.w3.org/TR/reporting/">{@code Report-To}</a> header field name. 334 * 335 * @since 27.1 336 */ 337 public static final String REPORT_TO = "Report-To"; 338 /** The HTTP {@code Retry-After} header field name. */ 339 public static final String RETRY_AFTER = "Retry-After"; 340 /** The HTTP {@code Server} header field name. */ 341 public static final String SERVER = "Server"; 342 /** 343 * The HTTP <a href="https://www.w3.org/TR/server-timing/">{@code Server-Timing}</a> header field 344 * name. 345 * 346 * @since 23.6 347 */ 348 public static final String SERVER_TIMING = "Server-Timing"; 349 /** 350 * The HTTP <a href="https://www.w3.org/TR/service-workers/#update-algorithm">{@code 351 * Service-Worker-Allowed}</a> header field name. 352 * 353 * @since 20.0 354 */ 355 public static final String SERVICE_WORKER_ALLOWED = "Service-Worker-Allowed"; 356 /** The HTTP {@code Set-Cookie} header field name. */ 357 public static final String SET_COOKIE = "Set-Cookie"; 358 /** The HTTP {@code Set-Cookie2} header field name. */ 359 public static final String SET_COOKIE2 = "Set-Cookie2"; 360 361 /** 362 * The HTTP <a href="http://goo.gl/Dxx19N">{@code SourceMap}</a> header field name. 363 * 364 * @since 27.1 365 */ 366 public static final String SOURCE_MAP = "SourceMap"; 367 368 /** 369 * The HTTP <a href="http://tools.ietf.org/html/rfc6797#section-6.1">{@code 370 * Strict-Transport-Security}</a> header field name. 371 * 372 * @since 15.0 373 */ 374 public static final String STRICT_TRANSPORT_SECURITY = "Strict-Transport-Security"; 375 /** 376 * The HTTP <a href="http://www.w3.org/TR/resource-timing/#cross-origin-resources">{@code 377 * Timing-Allow-Origin}</a> header field name. 378 * 379 * @since 15.0 380 */ 381 public static final String TIMING_ALLOW_ORIGIN = "Timing-Allow-Origin"; 382 /** The HTTP {@code Trailer} header field name. */ 383 public static final String TRAILER = "Trailer"; 384 /** The HTTP {@code Transfer-Encoding} header field name. */ 385 public static final String TRANSFER_ENCODING = "Transfer-Encoding"; 386 /** The HTTP {@code Vary} header field name. */ 387 public static final String VARY = "Vary"; 388 /** The HTTP {@code WWW-Authenticate} header field name. */ 389 public static final String WWW_AUTHENTICATE = "WWW-Authenticate"; 390 391 // Common, non-standard HTTP header fields 392 393 /** The HTTP {@code DNT} header field name. */ 394 public static final String DNT = "DNT"; 395 /** The HTTP {@code X-Content-Type-Options} header field name. */ 396 public static final String X_CONTENT_TYPE_OPTIONS = "X-Content-Type-Options"; 397 /** 398 * The HTTP <a 399 * href="https://iabtechlab.com/wp-content/uploads/2019/06/VAST_4.2_final_june26.pdf">{@code 400 * X-Device-IP}</a> header field name. Header used for VAST requests to provide the IP address of 401 * the device on whose behalf the request is being made. 402 * 403 * @since 31.0 404 */ 405 public static final String X_DEVICE_IP = "X-Device-IP"; 406 /** 407 * The HTTP <a 408 * href="https://iabtechlab.com/wp-content/uploads/2019/06/VAST_4.2_final_june26.pdf">{@code 409 * X-Device-Referer}</a> header field name. Header used for VAST requests to provide the {@link 410 * #REFERER} header value that the on-behalf-of client would have used when making a request 411 * itself. 412 * 413 * @since 31.0 414 */ 415 public static final String X_DEVICE_REFERER = "X-Device-Referer"; 416 /** 417 * The HTTP <a 418 * href="https://iabtechlab.com/wp-content/uploads/2019/06/VAST_4.2_final_june26.pdf">{@code 419 * X-Device-Accept-Language}</a> header field name. Header used for VAST requests to provide the 420 * {@link #ACCEPT_LANGUAGE} header value that the on-behalf-of client would have used when making 421 * a request itself. 422 * 423 * @since 31.0 424 */ 425 public static final String X_DEVICE_ACCEPT_LANGUAGE = "X-Device-Accept-Language"; 426 /** 427 * The HTTP <a 428 * href="https://iabtechlab.com/wp-content/uploads/2019/06/VAST_4.2_final_june26.pdf">{@code 429 * X-Device-Requested-With}</a> header field name. Header used for VAST requests to provide the 430 * {@link #X_REQUESTED_WITH} header value that the on-behalf-of client would have used when making 431 * a request itself. 432 * 433 * @since 31.0 434 */ 435 public static final String X_DEVICE_REQUESTED_WITH = "X-Device-Requested-With"; 436 /** The HTTP {@code X-Do-Not-Track} header field name. */ 437 public static final String X_DO_NOT_TRACK = "X-Do-Not-Track"; 438 /** The HTTP {@code X-Forwarded-For} header field name (superseded by {@code Forwarded}). */ 439 public static final String X_FORWARDED_FOR = "X-Forwarded-For"; 440 /** The HTTP {@code X-Forwarded-Proto} header field name. */ 441 public static final String X_FORWARDED_PROTO = "X-Forwarded-Proto"; 442 /** 443 * The HTTP <a href="http://goo.gl/lQirAH">{@code X-Forwarded-Host}</a> header field name. 444 * 445 * @since 20.0 446 */ 447 public static final String X_FORWARDED_HOST = "X-Forwarded-Host"; 448 /** 449 * The HTTP <a href="http://goo.gl/YtV2at">{@code X-Forwarded-Port}</a> header field name. 450 * 451 * @since 20.0 452 */ 453 public static final String X_FORWARDED_PORT = "X-Forwarded-Port"; 454 /** The HTTP {@code X-Frame-Options} header field name. */ 455 public static final String X_FRAME_OPTIONS = "X-Frame-Options"; 456 /** The HTTP {@code X-Powered-By} header field name. */ 457 public static final String X_POWERED_BY = "X-Powered-By"; 458 /** 459 * The HTTP <a href="http://tools.ietf.org/html/draft-evans-palmer-key-pinning">{@code 460 * Public-Key-Pins}</a> header field name. 461 * 462 * @since 15.0 463 */ 464 public static final String PUBLIC_KEY_PINS = "Public-Key-Pins"; 465 /** 466 * The HTTP <a href="http://tools.ietf.org/html/draft-evans-palmer-key-pinning">{@code 467 * Public-Key-Pins-Report-Only}</a> header field name. 468 * 469 * @since 15.0 470 */ 471 public static final String PUBLIC_KEY_PINS_REPORT_ONLY = "Public-Key-Pins-Report-Only"; 472 /** 473 * The HTTP {@code X-Request-ID} header field name. 474 * 475 * @since 30.1 476 */ 477 public static final String X_REQUEST_ID = "X-Request-ID"; 478 /** The HTTP {@code X-Requested-With} header field name. */ 479 public static final String X_REQUESTED_WITH = "X-Requested-With"; 480 /** The HTTP {@code X-User-IP} header field name. */ 481 public static final String X_USER_IP = "X-User-IP"; 482 /** 483 * The HTTP <a href="https://goo.gl/VKpXxa">{@code X-Download-Options}</a> header field name. 484 * 485 * <p>When the new X-Download-Options header is present with the value {@code noopen}, the user is 486 * prevented from opening a file download directly; instead, they must first save the file 487 * locally. 488 * 489 * @since 24.1 490 */ 491 public static final String X_DOWNLOAD_OPTIONS = "X-Download-Options"; 492 /** The HTTP {@code X-XSS-Protection} header field name. */ 493 public static final String X_XSS_PROTECTION = "X-XSS-Protection"; 494 /** 495 * The HTTP <a 496 * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control">{@code 497 * X-DNS-Prefetch-Control}</a> header controls DNS prefetch behavior. Value can be "on" or "off". 498 * By default, DNS prefetching is "on" for HTTP pages and "off" for HTTPS pages. 499 */ 500 public static final String X_DNS_PREFETCH_CONTROL = "X-DNS-Prefetch-Control"; 501 /** 502 * The HTTP <a href="http://html.spec.whatwg.org/multipage/semantics.html#hyperlink-auditing"> 503 * {@code Ping-From}</a> header field name. 504 * 505 * @since 19.0 506 */ 507 public static final String PING_FROM = "Ping-From"; 508 /** 509 * The HTTP <a href="http://html.spec.whatwg.org/multipage/semantics.html#hyperlink-auditing"> 510 * {@code Ping-To}</a> header field name. 511 * 512 * @since 19.0 513 */ 514 public static final String PING_TO = "Ping-To"; 515 516 /** 517 * The HTTP <a 518 * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#As_a_server_admin.2C_can_I_distinguish_prefetch_requests_from_normal_requests.3F">{@code 519 * Purpose}</a> header field name. 520 * 521 * @since 28.0 522 */ 523 public static final String PURPOSE = "Purpose"; 524 /** 525 * The HTTP <a 526 * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#As_a_server_admin.2C_can_I_distinguish_prefetch_requests_from_normal_requests.3F">{@code 527 * X-Purpose}</a> header field name. 528 * 529 * @since 28.0 530 */ 531 public static final String X_PURPOSE = "X-Purpose"; 532 /** 533 * The HTTP <a 534 * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#As_a_server_admin.2C_can_I_distinguish_prefetch_requests_from_normal_requests.3F">{@code 535 * X-Moz}</a> header field name. 536 * 537 * @since 28.0 538 */ 539 public static final String X_MOZ = "X-Moz"; 540 541 /** 542 * The HTTP <a 543 * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Device-Memory">{@code 544 * Device-Memory}</a> header field name. 545 * 546 * @since 31.0 547 */ 548 public static final String DEVICE_MEMORY = "Device-Memory"; 549 550 /** 551 * The HTTP <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Downlink">{@code 552 * Downlink}</a> header field name. 553 * 554 * @since 31.0 555 */ 556 public static final String DOWNLINK = "Downlink"; 557 558 /** 559 * The HTTP <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ECT">{@code 560 * ECT}</a> header field name. 561 * 562 * @since 31.0 563 */ 564 public static final String ECT = "ECT"; 565 566 /** 567 * The HTTP <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/RTT">{@code 568 * RTT}</a> header field name. 569 * 570 * @since 31.0 571 */ 572 public static final String RTT = "RTT"; 573 574 /** 575 * The HTTP <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Save-Data">{@code 576 * Save-Data}</a> header field name. 577 * 578 * @since 31.0 579 */ 580 public static final String SAVE_DATA = "Save-Data"; 581 582 /** 583 * The HTTP <a 584 * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Viewport-Width">{@code 585 * Viewport-Width}</a> header field name. 586 * 587 * @since 31.0 588 */ 589 public static final String VIEWPORT_WIDTH = "Viewport-Width"; 590 591 /** 592 * The HTTP <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Width">{@code 593 * Width}</a> header field name. 594 * 595 * @since 31.0 596 */ 597 public static final String WIDTH = "Width"; 598 599 /** 600 * The HTTP <a href="https://www.w3.org/TR/permissions-policy-1/">{@code Permissions-Policy}</a> 601 * header field name. 602 * 603 * @since 31.0 604 */ 605 public static final String PERMISSIONS_POLICY = "Permissions-Policy"; 606 607 /** 608 * The HTTP <a 609 * href="https://wicg.github.io/user-preference-media-features-headers/#sec-ch-prefers-color-scheme">{@code 610 * Sec-CH-Prefers-Color-Scheme}</a> header field name. 611 * 612 * <p>This header is experimental. 613 * 614 * @since 31.0 615 */ 616 public static final String SEC_CH_PREFERS_COLOR_SCHEME = "Sec-CH-Prefers-Color-Scheme"; 617 618 /** 619 * The HTTP <a 620 * href="https://www.rfc-editor.org/rfc/rfc8942#name-the-accept-ch-response-head">{@code 621 * Accept-CH}</a> header field name. 622 * 623 * @since 31.0 624 */ 625 public static final String ACCEPT_CH = "Accept-CH"; 626 /** 627 * The HTTP <a 628 * href="https://datatracker.ietf.org/doc/html/draft-davidben-http-client-hint-reliability-03.txt#section-3">{@code 629 * Critical-CH}</a> header field name. 630 * 631 * @since 31.0 632 */ 633 public static final String CRITICAL_CH = "Critical-CH"; 634 635 /** 636 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua">{@code Sec-CH-UA}</a> 637 * header field name. 638 * 639 * @since 30.0 640 */ 641 public static final String SEC_CH_UA = "Sec-CH-UA"; 642 /** 643 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-arch">{@code 644 * Sec-CH-UA-Arch}</a> header field name. 645 * 646 * @since 30.0 647 */ 648 public static final String SEC_CH_UA_ARCH = "Sec-CH-UA-Arch"; 649 /** 650 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-model">{@code 651 * Sec-CH-UA-Model}</a> header field name. 652 * 653 * @since 30.0 654 */ 655 public static final String SEC_CH_UA_MODEL = "Sec-CH-UA-Model"; 656 /** 657 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-platform">{@code 658 * Sec-CH-UA-Platform}</a> header field name. 659 * 660 * @since 30.0 661 */ 662 public static final String SEC_CH_UA_PLATFORM = "Sec-CH-UA-Platform"; 663 /** 664 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-platform-version">{@code 665 * Sec-CH-UA-Platform-Version}</a> header field name. 666 * 667 * @since 30.0 668 */ 669 public static final String SEC_CH_UA_PLATFORM_VERSION = "Sec-CH-UA-Platform-Version"; 670 /** 671 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-full-version">{@code 672 * Sec-CH-UA-Full-Version}</a> header field name. 673 * 674 * @deprecated Prefer {@link SEC_CH_UA_FULL_VERSION_LIST}. 675 * @since 30.0 676 */ 677 @Deprecated public static final String SEC_CH_UA_FULL_VERSION = "Sec-CH-UA-Full-Version"; 678 /** 679 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-full-version-list">{@code 680 * Sec-CH-UA-Full-Version}</a> header field name. 681 * 682 * @since 31.1 683 */ 684 public static final String SEC_CH_UA_FULL_VERSION_LIST = "Sec-CH-UA-Full-Version-List"; 685 /** 686 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-mobile">{@code 687 * Sec-CH-UA-Mobile}</a> header field name. 688 * 689 * @since 30.0 690 */ 691 public static final String SEC_CH_UA_MOBILE = "Sec-CH-UA-Mobile"; 692 /** 693 * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-bitness">{@code 694 * Sec-CH-UA-Bitness}</a> header field name. 695 * 696 * @since 31.0 697 */ 698 public static final String SEC_CH_UA_BITNESS = "Sec-CH-UA-Bitness"; 699 700 /** 701 * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Fetch-Dest}</a> 702 * header field name. 703 * 704 * @since 27.1 705 */ 706 public static final String SEC_FETCH_DEST = "Sec-Fetch-Dest"; 707 /** 708 * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Fetch-Mode}</a> 709 * header field name. 710 * 711 * @since 27.1 712 */ 713 public static final String SEC_FETCH_MODE = "Sec-Fetch-Mode"; 714 /** 715 * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Fetch-Site}</a> 716 * header field name. 717 * 718 * @since 27.1 719 */ 720 public static final String SEC_FETCH_SITE = "Sec-Fetch-Site"; 721 /** 722 * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Fetch-User}</a> 723 * header field name. 724 * 725 * @since 27.1 726 */ 727 public static final String SEC_FETCH_USER = "Sec-Fetch-User"; 728 /** 729 * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Metadata}</a> 730 * header field name. 731 * 732 * @since 26.0 733 */ 734 public static final String SEC_METADATA = "Sec-Metadata"; 735 /** 736 * The HTTP <a href="https://tools.ietf.org/html/draft-ietf-tokbind-https">{@code 737 * Sec-Token-Binding}</a> header field name. 738 * 739 * @since 25.1 740 */ 741 public static final String SEC_TOKEN_BINDING = "Sec-Token-Binding"; 742 /** 743 * The HTTP <a href="https://tools.ietf.org/html/draft-ietf-tokbind-ttrp">{@code 744 * Sec-Provided-Token-Binding-ID}</a> header field name. 745 * 746 * @since 25.1 747 */ 748 public static final String SEC_PROVIDED_TOKEN_BINDING_ID = "Sec-Provided-Token-Binding-ID"; 749 /** 750 * The HTTP <a href="https://tools.ietf.org/html/draft-ietf-tokbind-ttrp">{@code 751 * Sec-Referred-Token-Binding-ID}</a> header field name. 752 * 753 * @since 25.1 754 */ 755 public static final String SEC_REFERRED_TOKEN_BINDING_ID = "Sec-Referred-Token-Binding-ID"; 756 /** 757 * The HTTP <a href="https://tools.ietf.org/html/rfc6455">{@code Sec-WebSocket-Accept}</a> header 758 * field name. 759 * 760 * @since 28.0 761 */ 762 public static final String SEC_WEBSOCKET_ACCEPT = "Sec-WebSocket-Accept"; 763 /** 764 * The HTTP <a href="https://tools.ietf.org/html/rfc6455">{@code Sec-WebSocket-Extensions}</a> 765 * header field name. 766 * 767 * @since 28.0 768 */ 769 public static final String SEC_WEBSOCKET_EXTENSIONS = "Sec-WebSocket-Extensions"; 770 /** 771 * The HTTP <a href="https://tools.ietf.org/html/rfc6455">{@code Sec-WebSocket-Key}</a> header 772 * field name. 773 * 774 * @since 28.0 775 */ 776 public static final String SEC_WEBSOCKET_KEY = "Sec-WebSocket-Key"; 777 /** 778 * The HTTP <a href="https://tools.ietf.org/html/rfc6455">{@code Sec-WebSocket-Protocol}</a> 779 * header field name. 780 * 781 * @since 28.0 782 */ 783 public static final String SEC_WEBSOCKET_PROTOCOL = "Sec-WebSocket-Protocol"; 784 /** 785 * The HTTP <a href="https://tools.ietf.org/html/rfc6455">{@code Sec-WebSocket-Version}</a> header 786 * field name. 787 * 788 * @since 28.0 789 */ 790 public static final String SEC_WEBSOCKET_VERSION = "Sec-WebSocket-Version"; 791 /** 792 * The HTTP <a href="https://tools.ietf.org/html/rfc8586">{@code CDN-Loop}</a> header field name. 793 * 794 * @since 28.0 795 */ 796 public static final String CDN_LOOP = "CDN-Loop"; 797}