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---
title: Заголовки HTTP
slug: Web/HTTP/Headers
tags:
  - HTTP
  - Заголовки
translation_of: Web/HTTP/Headers
original_slug: Web/HTTP/Заголовки
---
<p>{{ HTTPSidebar }}</p>

<p><span class="seoSummary"><strong>Заголовки HTTP </strong>позволяют клиенту и серверу отправлять дополнительную информацию с HTTP запросом или ответом. В HTTP-заголовке содержится не чувствительное к регистру название, а затем после (<code>:</code>) непостредственно значение.</span> <a href="https://wiki.developer.mozilla.org/en-US/docs/Glossary/Whitespace">Пробелы</a> перед значением игнорируются.</p>

<p><span class="tlid-translation translation" lang="ru"><span title="">Пользовательские собственные заголовки исторически использовались с префиксом X, но это соглашение было объявлено устаревшим в июне 2012 года из-за неудобств, вызванных тем, что нестандартные поля стали стандартом в </span></span> <a href="https://tools.ietf.org/html/rfc6648">RFC 6648</a><span class="tlid-translation translation" lang="ru"><span title="">;</span> <span title="">другие перечислены в реестре <a href="http://www.iana.org/assignments/message-headers/perm-headers.html">IANA</a>, исходное содержимое которого было определено в </span></span> <a class="external external-icon" href="http://tools.ietf.org/html/rfc4229">RFC 4229</a>.<span class="tlid-translation translation" lang="ru"><span title=""> IANA также поддерживает <a href="https://www.iana.org/assignments/message-headers/message-headers.xhtml">реестр предлагаемых новых заголовков HTTP</a>.</span></span></p>

<p>HTTP-заголовки сопровождают обмен данными по протоколу HTTP. Они могут содержать описание данных и информацию, необходимую для взаимодействия между клиентом и сервером. Заголовки и их статусы перечислены в <a href="http://www.iana.org/assignments/message-headers/perm-headers.html">реестре IANA</a>, который постоянно обновляется.</p>

<p>Заголовки могут быть сгруппированы по следующим контекстам:</p>

<ul>
 <li>{{Glossary("General header", "Основные заголовки")}} <span class="tlid-translation translation" lang="ru"><span title="">применяется как к запросам, так и к ответам, но не имеет отношения к данным, передаваемым в теле.</span></span></li>
 <li>{{Glossary("Заголовок запроса", "Заголовки запроса")}} <span class="tlid-translation translation" lang="ru"><span title="">содержит больше информации о ресурсе, который нужно получить, или о клиенте, запрашивающем ресурс</span></span>.</li>
 <li>{{Glossary("Response header", "Заголовки ответа")}} <span class="tlid-translation translation" lang="ru"><span title="">содержат дополнительную информацию об ответе, например его местонахождение, или о сервере, предоставившем его.</span></span></li>
 <li>{{Glossary("Entity header", "Заголовки сущности")}} <span class="tlid-translation translation" lang="ru"><span title="">содержат информацию о теле ресурса, например его </span></span><a href="https://wiki.developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Length">длину содержимого </a>или тип <a href="https://wiki.developer.mozilla.org/en-US/docs/Web/SVG/Content_type">MIME</a>.</li>
</ul>

<p>Заголовки также могут быть сгруппированы согласно тому, как <a href="https://wiki.developer.mozilla.org/en-US/docs/Glossary/Proxy_server">прокси (proxies)</a> обрабатывают их:</p>

<ul>
 <li>{{ httpheader("Connection") }}</li>
 <li>{{ httpheader("Keep-Alive") }}</li>
 <li>{{ httpheader("Proxy-Authenticate") }}</li>
 <li>{{ httpheader("Proxy-Authorization") }}</li>
 <li>{{ httpheader("TE") }}</li>
 <li>{{ httpheader("Trailer") }}</li>
 <li>{{ httpheader("Transfer-Encoding") }}</li>
 <li>{{ httpheader("Upgrade") }}.</li>
</ul>

<p><strong>Сквозные заголовки</strong><br>
      Эти заголовки должны быть переданы конечному получателю сообщения: серверу для запроса или клиенту для ответа. Промежуточные прокси-серверы должны повторно передавать эти заголовки без изменений, а кэши должны их хранить.</p>

<p><strong>Хоп-хоп заголовки (Хоп-хоп заголовки)</strong><br>
      Эти заголовки имеют смысл только для одного соединения транспортного уровня и не должны повторно передаваться прокси или кэшироваться. Обратите внимание, что с помощью общего заголовка {{httpheader ("Connection")}} могут быть установлены только заголовки переходов.</p>

<h2 id="Аутентификация">Аутентификация</h2>

<dl>
</dl>

<p><br>
 <strong>{{HTTPHeader("WWW-Authenticate")}}</strong><br>
 Определяет метод аутентификации, который должен использоваться для доступа к ресурсу.<br>
 <strong>{{HTTPHeader ( "Authorization")}}</strong><br>
 Содержит учетные данные для аутентификации агента пользователя на сервере.<br>
 <strong>{{HTTPHeader ( "Proxy-Authenticate")}}</strong><br>
 Определяет метод аутентификации, который должен использоваться для доступа к ресурсам на прокси-сервере.<br>
 <strong>{{HTTPHeader ( "Proxy-Authorization")}}</strong><br>
 Содержит учетные данные для аутентификации агента пользователя с прокси-сервером.</p>

<p>Ниже перечислены основные HTTP заголовки с кратким описанием:</p>

<table class="standard-table" style="width: 100%;">
 <tbody>
  <tr>
   <th>Заголовок</th>
   <th>Описание</th>
   <th>Подробнее</th>
   <th>Стандарт</th>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Content_negotiation#The_Accept.3a_header" title="https://developer.mozilla.org/en/HTTP/Content_negotiation#The_Accept.3a_header">Accept</a></code></td>
   <td>Список MIME типов, которые ожидает клиент.</td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>HTTP/1.1</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Content_negotiation#The_Accept-CH_header">Accept-CH</a></code>
    <p>{{non-standard_inline}}</p>
   </td>
   <td>Список конфигурационных данных, которые могут быть учтены сервером при выборе соответствующего ответа клиенту.</td>
   <td><a href="http://igrigorik.github.io/http-client-hints">HTTP Client Hints</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Content_negotiation#The_Accept-Charset.3a_header" title="https://developer.mozilla.org/en/HTTP/Content_negotiation#The_Accept-Charset.3a_header">Accept-Charset</a></code></td>
   <td>Список кодировок, которые ожидает клиент.</td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>HTTP/1.1</td>
  </tr>
  <tr>
   <td><code>Accept-Features</code></td>
   <td></td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>RFC 2295, §8.2</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Content_negotiation#The_Accept-Encoding.3a_header" title="https://developer.mozilla.org/en/HTTP/Content_negotiation#The_Accept-Encoding.3a_header">Accept-Encoding</a></code></td>
   <td>Спиcок форматов сжатия данных, которые поддерживает клиент.</td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>HTTP/1.1</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Content_negotiation#The_Accept-Language.3a_header" title="https://developer.mozilla.org/en/HTTP/Content_negotiation#The_Accept-Language.3a_header">Accept-Language</a></code></td>
   <td>Определяет языковые предпочтения клиента.</td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>HTTP/1.1</td>
  </tr>
  <tr>
   <td><code><a href="/ru/docs/Web/HTTP/Заголовки/Accept-Ranges" title="ru/Accept-Ranges">Accept-Ranges</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Allow-Credentials" title="https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Allow-Credentials">Access-Control-Allow-Credentials</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Allow-Origin" title="https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Allow-Origin">Access-Control-Allow-Origin</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Allow-Methods" title="https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Allow-Methods">Access-Control-Allow-Methods</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Allow-Headers" title="https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Allow-Headers">Access-Control-Allow-Headers</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Max-Age" title="https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Max-Age">Access-Control-Max-Age</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Expose-Header" title="en/HTTP access control#Access-Control-Expose-Header">Access-Control-Expose-Headers</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("2") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Request-Method" title="https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Request-Method">Access-Control-Request-Method</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Access-Control-Request-Headers" title="https://developer.mozilla.org/En/HTTP_access_control#Access-Control-Request-Headers">Access-Control-Request-Headers</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td><a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Age" title="en/Age">Age</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Allow" title="en/Allow">Allow</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code>Alternates</code></td>
   <td></td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>RFC 2295, §8.3</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Authorization" title="en/Authorization">Authorization</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Cache-Control" title="en/Cache-Control">Cache-Control</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/ru/docs/Web/HTTP/Заголовки/Connection" title="ru/Connection">Connection</a></code></td>
   <td>Определяет, остается ли сетевое соединение открытым после завершения текущей транзакции (запроса).</td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-Encoding" title="en/Content-Encoding">Content-Encoding</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-Language" title="en/Content-Language">Content-Language</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-Length" title="en/Content-Length">Content-Length</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-Location" title="en/Content-Location">Content-Location</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-MD5" title="en/Content-MD5">Content-MD5</a></code></td>
   <td></td>
   <td>{{ unimplemented_inline("232030") }}</td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-Range" title="en/Content-Range">Content-Range</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-Security-Policy" title="en/Content-Security-Policy">Content-Security-Policy</a></code></td>
   <td>Реализует механизм защиты от угроз межсайтового выполнения скриптов.</td>
   <td><a href="/en/Security/CSP">CSP (Content Security Policy)</a></td>
   <td><a href="http://www.w3.org/TR/CSP2/">W3C Content Security Policy</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Content-Type" title="en/Content-Type">Content-Type</a></code></td>
   <td>Позволяет клиенту определить MIME тип документа.</td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Cookie" title="en/Cookie">Cookie</a></code></td>
   <td></td>
   <td></td>
   <td><a class="external" href="http://www.ietf.org/rfc/rfc2109.txt" title="http://www.ietf.org/rfc/rfc2109.txt">RFC 2109</a></td>
  </tr>
  <tr>
   <td><code>DNT</code></td>
   <td>With a value of 1, indicates that the user explicitly opts out of any form of online tracking.</td>
   <td>Supported by Firefox 4, Firefox 5 for mobile, IE9, and a few major companies.</td>
   <td>{{SpecName("Tracking")}}</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Date" title="en/Date">Date</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/ETag" title="en/ETag">ETag</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Expect" title="en/Expect">Expect</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Expires" title="en/Expires">Expires</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/From" title="en/From">From</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Host" title="en/Host">Host</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/If-Match" title="en/If-Match">If-Match</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/If-Modified-Since" title="en/If-Modified-Since">If-Modified-Since</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/If-None-Match" title="en/If-None-Match">If-None-Match</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/If-Range" title="en/If-Range">If-Range</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/If-Unmodified-Since" title="en/If-Unmodified-Since">If-Unmodified-Since</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Last-Event-ID" title="en/Last-Event-ID">Last-Event-ID</a></code></td>
   <td>Содержит идентификатор последнего события полученного клиентом от сервера в предыдущем HTTP запросе. Используется для восстановления синхронизации потока <code>text/event-stream</code>.</td>
   <td><a href="/en-US/docs/Server-sent_events" title="en/Server-Sent Events">Server-Sent Events</a></td>
   <td><a class="external" href="http://dev.w3.org/html5/eventsource/" title="http://dev.w3.org/html5/eventsource/">Server-Sent Events spec</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Last-Modified" title="en/Last-Modified">Last-Modified</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Link" title="en/HTTP/Headers/Link">Link</a></code></td>
   <td>Содержит ссылки на связанные ресурсы и определяет их отношение к отправленному документу.</td>
   <td>
    <p>For the <code>rel=prefetch</code> case, see <a href="/en-US/docs/Link_prefetching_FAQ" title="en/Link prefetching FAQ">Link Prefetching FAQ</a></p>
   </td>
   <td>
    <p>Introduced in <a class="external" href="http://tools.ietf.org/html/rfc2068#section-19.6.2.4" title="http://tools.ietf.org/html/rfc2068#section-19.6.2.4">HTTP 1.1's RFC 2068, section 19.6.2.4</a>, it was removed in the final <a class="external" href="http://www.w3.org/Protocols/rfc2616/rfc2616.html" title="http://www.w3.org/Protocols/rfc2616/rfc2616.html">HTTP 1.1 spec</a>, then reintroduced, with some extensions, in <a class="external" href="http://greenbytes.de/tech/webdav/rfc5988.html" title="http://greenbytes.de/tech/webdav/rfc5988.html">RFC 5988</a></p>
   </td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Location" title="en/Location">Location</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Max-Forwards" title="en/Max-Forwards">Max-Forwards</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code>Negotiate</code></td>
   <td></td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>RFC 2295, §8.4</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/HTTP_access_control#Origin" title="https://developer.mozilla.org/En/HTTP_access_control#Origin">Origin</a></code></td>
   <td></td>
   <td><a href="/en-US/docs/HTTP_access_control" title="En/HTTP access control">HTTP Access Control</a> and <a href="/en-US/docs/Server-Side_Access_Control" title="En/Server-Side Access Control">Server Side Access Control</a>{{ gecko_minversion_inline("1.9.1") }}</td>
   <td>More recently defined in the <a href="https://fetch.spec.whatwg.org/#http-extensions">Fetch spec</a> (see <a href="/en-US/docs/Web/API/Fetch_API">Fetch API</a>.) Originally defined in <a class="external" href="http://www.w3.org/TR/cors/" title="http://www.w3.org/TR/cors/">W3C Cross-Origin Resource Sharing</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Pragma" title="en/Pragma">Pragma</a></code></td>
   <td></td>
   <td>for the pragma: nocache value see <a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Proxy-Authenticate" title="en/Proxy-Authenticate">Proxy-Authenticate</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Proxy-Authorization" title="en/Proxy-Authorization">Proxy-Authorization</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Range" title="en/Range">Range</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/ru/docs/Web/HTTP/Заголовки/Referer" title="ru/Referer">Referer</a></code></td>
   <td>
    <p>Содержит URL-адрес ресурса, из которого был запрошен обрабатываемый запрос. Если запрос поступил из закладки, прямого ввода адреса пользователем или с помощью других методов, при которых исходного ресурса нет, то этот заголовок отсутствует или имеет значение "about:blank".</p>

    <div class="note">
    <p>Это ошибочное имя заголовка (referer, вместо referrer) было введено в спецификацию HTTP/0.9, и ошибка должна была быть сохранена в более поздних версиях протокола для совместимости.</p>
    </div>
   </td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Retry-After" title="en/Retry-After">Retry-After</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code>Sec-Websocket-Extensions</code></td>
   <td></td>
   <td></td>
   <td> <a class="external" href="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07" title="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07">Websockets</a></td>
  </tr>
  <tr>
   <td><code>Sec-Websocket-Key</code></td>
   <td></td>
   <td></td>
   <td> <a class="external" href="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07" title="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07">Websockets</a></td>
  </tr>
  <tr>
   <td><code>Sec-Websocket-Origin</code></td>
   <td></td>
   <td></td>
   <td> <a class="external" href="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07" title="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07">Websockets</a></td>
  </tr>
  <tr>
   <td><code>Sec-Websocket-Protocol</code></td>
   <td></td>
   <td></td>
   <td> <a class="external" href="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07" title="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07">Websockets</a></td>
  </tr>
  <tr>
   <td><code>Sec-Websocket-Version</code></td>
   <td></td>
   <td></td>
   <td> <a class="external" href="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07" title="http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-07">Websockets</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Server" title="en/Server">Server</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Set-Cookie" title="en/Set-Cookie">Set-Cookie</a></code></td>
   <td></td>
   <td></td>
   <td><a class="external" href="http://www.ietf.org/rfc/rfc2109.txt" title="http://www.ietf.org/rfc/rfc2109.txt">RFC 2109</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Set-Cookie2" title="en/Set-Cookie2">Set-Cookie2</a></code></td>
   <td></td>
   <td></td>
   <td><a class="external" href="http://www.ietf.org/rfc/rfc2965.txt" title="http://www.ietf.org/rfc/rfc2965.txt">RFC 2965</a></td>
  </tr>
  <tr>
   <td><code>Strict-Transport-Security</code></td>
   <td></td>
   <td><a href="/en-US/docs/Security/HTTP_Strict_Transport_Security" title="en/Security/HTTP Strict Transport Security">HTTP Strict Transport Security</a></td>
   <td><a class="external" href="http://tools.ietf.org/html/draft-hodges-strict-transport-sec-02" title="http://tools.ietf.org/html/draft-hodges-strict-transport-sec-02">IETF reference</a></td>
  </tr>
  <tr>
   <td><code>TCN</code></td>
   <td></td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>RFC 2295, §8.5</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/TE" title="en/TE">TE</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Trailer" title="en/Trailer">Trailer</a></code></td>
   <td>lists the headers that will be transmitted after the message body, in a trailer block. This allows servers to compute some values, like <code>Content-MD5:</code> while transmitting the data. Note that the <code>Trailer:</code> header must not list the <code>Content-Length:,</code> <code>Trailer:</code> or <code>Transfer-Encoding:</code> headers.</td>
   <td></td>
   <td><a class="external" href="http://tools.ietf.org/html/rfc2616#section-14.40" title="http://tools.ietf.org/html/rfc2616#section-14.40">RFC 2616, §14.40</a></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Transfer-Encoding" title="en/Transfer-Encoding">Transfer-Encoding</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Upgrade" title="en/Upgrade">Upgrade</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Content_negotiation#The_User-Agent.3a_header" title="https://developer.mozilla.org/en/HTTP/Content_negotiation#The_User-Agent.3a_header">User-Agent</a></code></td>
   <td></td>
   <td>for Gecko's user agents see the <a href="/en-US/docs/User_Agent_Strings_Reference" title="En/User Agent Strings Reference">User Agents Reference</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code>Variant-Vary</code></td>
   <td></td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content negotiation">HTTP Content Negotiation</a></td>
   <td>RFC 2295, §8.6</td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Content_negotiation#The_Vary.3a_response_header" title="https://developer.mozilla.org/en/HTTP/Content_negotiation#The_Vary.3a_response_header">Vary</a></code></td>
   <td>lists the headers used as criteria for choosing a specific content by the web server. This server is important for efficient and correct caching of the resource sent.</td>
   <td><a href="/ru/docs/Web/HTTP/Content_negotiation" title="ru/HTTP/Content_negotiation">HTTP Content Negotiation</a> &amp; <a href="/en-US/docs/HTTP_Caching_FAQ" title="en/HTTP Caching FAQ">HTTP Caching FAQ</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Via" title="en/Via">Via</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/Warning" title="en/Warning">Warning</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code><a href="/en-US/docs/Web/HTTP/Headers/WWW-Authenticate" title="en/WWW-Authenticate">WWW-Authenticate</a></code></td>
   <td></td>
   <td></td>
   <td></td>
  </tr>
  <tr>
   <td><code>X-Content-Duration</code></td>
   <td></td>
   <td><a href="/en-US/docs/Configuring_servers_for_Ogg_media" title="https://developer.mozilla.org/en/Configuring_servers_for_Ogg_media">Configuring servers for Ogg media</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code>X-Content-Security-Policy</code></td>
   <td></td>
   <td>Using <a href="/en-US/docs/Security/CSP/Using_Content_Security_Policy" title="en/Security/CSP/Using Content Security Policy">Content Security Policy</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code>X-DNSPrefetch-Control</code></td>
   <td></td>
   <td><a href="/en-US/docs/Controlling_DNS_prefetching" title="En/Controlling DNS prefetching">Controlling DNS prefetching</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code>X-Frame-Options</code></td>
   <td></td>
   <td><a href="/en-US/docs/The_X-FRAME-OPTIONS_response_header" title="en/The X-FRAME-OPTIONS response header">The XFrame-Option Response Header</a></td>
   <td></td>
  </tr>
  <tr>
   <td><code>X-Requested-With</code></td>
   <td>Often used with the value "XMLHttpRequest" when it is the case</td>
   <td></td>
   <td>Not standard</td>
  </tr>
 </tbody>
</table>

<h2 id="Примечание">Примечание</h2>

<div class="note">
<p><strong>Note:</strong> The Keep-Alive request header is not sent by {{Gecko ("5.0") }}; previous versions did send it but it was not formatted correctly, so the decision was made to remove it for the time being. The {{ httpheader("Connection") }} or {{ httpheader("Proxy-Connection") }} header is still sent, however, with the value "keep-alive".</p>
</div>

<h2 id="Смотри_также">Смотри также</h2>

<p><a class="external" href="http://en.wikipedia.org/wiki/List_of_HTTP_header_fields">Wikipedia page on List of HTTP headers</a></p>