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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `header` mod in crate `actix_http`."><meta name="keywords" content="rust, rustlang, rust-lang, header"><title>actix_http::http::header - Rust</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="shortcut icon" href="../../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../../actix_http/index.html'><div class='logo-container'><img src='../../../rust-logo.png' alt='logo'></div></a><p class='location'>Module header</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#constants">Constants</a></li><li><a href="#traits">Traits</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'><a href='../../index.html'>actix_http</a>::<wbr><a href='../index.html'>http</a></p><script>window.sidebarCurrent = {name: 'header', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../../../src/actix_http/lib.rs.html#61-63' title='goto source code'>[src]</a></span><span class='in-band'>Module <a href='../../index.html'>actix_http</a>::<wbr><a href='../index.html'>http</a>::<wbr><a class="mod" href=''>header</a></span></h1><div class='docblock'><p>Various http headers</p>
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
<table><tr class='module-item'><td><a class="struct" href="struct.Accept.html" title='actix_http::http::header::Accept struct'>Accept</a></td><td class='docblock-short'><p><code>Accept</code> header, defined in <a href="http://tools.ietf.org/html/rfc7231#section-5.3.2">RFC7231</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.AcceptCharset.html" title='actix_http::http::header::AcceptCharset struct'>AcceptCharset</a></td><td class='docblock-short'><p><code>Accept-Charset</code> header, defined in
<a href="http://tools.ietf.org/html/rfc7231#section-5.3.3">RFC7231</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.AcceptLanguage.html" title='actix_http::http::header::AcceptLanguage struct'>AcceptLanguage</a></td><td class='docblock-short'><p><code>Accept-Language</code> header, defined in
<a href="http://tools.ietf.org/html/rfc7231#section-5.3.5">RFC7231</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.Allow.html" title='actix_http::http::header::Allow struct'>Allow</a></td><td class='docblock-short'><p><code>Allow</code> header, defined in <a href="http://tools.ietf.org/html/rfc7231#section-7.4.1">RFC7231</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.CacheControl.html" title='actix_http::http::header::CacheControl struct'>CacheControl</a></td><td class='docblock-short'><p><code>Cache-Control</code> header, defined in <a href="https://tools.ietf.org/html/rfc7234#section-5.2">RFC7234</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ContentDisposition.html" title='actix_http::http::header::ContentDisposition struct'>ContentDisposition</a></td><td class='docblock-short'><p>A <em>Content-Disposition</em> header. It is compatible to be used either as
<a href="https://mdn.io/Content-Disposition#As_a_response_header_for_the_main_body">a response header for the main body</a>
as (re)defined in <a href="https://tools.ietf.org/html/rfc6266">RFC6266</a>, or as
<a href="https://mdn.io/Content-Disposition#As_a_header_for_a_multipart_body">a header for a multipart body</a>
as (re)defined in <a href="https://tools.ietf.org/html/rfc7578">RFC7587</a>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ContentLanguage.html" title='actix_http::http::header::ContentLanguage struct'>ContentLanguage</a></td><td class='docblock-short'><p><code>Content-Language</code> header, defined in
<a href="https://tools.ietf.org/html/rfc7231#section-3.1.3.2">RFC7231</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ContentRange.html" title='actix_http::http::header::ContentRange struct'>ContentRange</a></td><td class='docblock-short'><p><code>Content-Range</code> header, defined in
<a href="http://tools.ietf.org/html/rfc7233#section-4.2">RFC7233</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ContentType.html" title='actix_http::http::header::ContentType struct'>ContentType</a></td><td class='docblock-short'><p><code>Content-Type</code> header, defined in
<a href="http://tools.ietf.org/html/rfc7231#section-3.1.1.5">RFC7231</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.Date.html" title='actix_http::http::header::Date struct'>Date</a></td><td class='docblock-short'><p><code>Date</code> header, defined in <a href="http://tools.ietf.org/html/rfc7231#section-7.1.1.2">RFC7231</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.Drain.html" title='actix_http::http::header::Drain struct'>Drain</a></td><td class='docblock-short'><p>A drain iterator for <code>HeaderMap</code>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ETag.html" title='actix_http::http::header::ETag struct'>ETag</a></td><td class='docblock-short'><p><code>ETag</code> header, defined in <a href="http://tools.ietf.org/html/rfc7232#section-2.3">RFC7232</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.Expires.html" title='actix_http::http::header::Expires struct'>Expires</a></td><td class='docblock-short'><p><code>Expires</code> header, defined in <a href="http://tools.ietf.org/html/rfc7234#section-5.3">RFC7234</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ExtendedValue.html" title='actix_http::http::header::ExtendedValue struct'>ExtendedValue</a></td><td class='docblock-short'><p>The value part of an extended parameter consisting of three parts:
the REQUIRED character set name (<code>charset</code>), the OPTIONAL language information (<code>language_tag</code>),
and a character sequence representing the actual value (<code>value</code>), separated by single quote
characters. It is defined in <a href="https://tools.ietf.org/html/rfc5987#section-3.2">RFC 5987</a>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.GetAll.html" title='actix_http::http::header::GetAll struct'>GetAll</a></td><td class='docblock-short'><p>A view to all values stored in a single entry.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.HeaderMap.html" title='actix_http::http::header::HeaderMap struct'>HeaderMap</a></td><td class='docblock-short'><p>A set of HTTP headers</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.HeaderMap.html" title='actix_http::http::header::HeaderMap struct'>HeaderMap</a></td><td class='docblock-short'><p>A set of HTTP headers</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.HeaderName.html" title='actix_http::http::header::HeaderName struct'>HeaderName</a></td><td class='docblock-short'><p>Represents an HTTP header field name</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.HeaderValue.html" title='actix_http::http::header::HeaderValue struct'>HeaderValue</a></td><td class='docblock-short'><p>Represents an HTTP header field value.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.IfModifiedSince.html" title='actix_http::http::header::IfModifiedSince struct'>IfModifiedSince</a></td><td class='docblock-short'><p><code>If-Modified-Since</code> header, defined in
<a href="http://tools.ietf.org/html/rfc7232#section-3.3">RFC7232</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.IfUnmodifiedSince.html" title='actix_http::http::header::IfUnmodifiedSince struct'>IfUnmodifiedSince</a></td><td class='docblock-short'><p><code>If-Unmodified-Since</code> header, defined in
<a href="http://tools.ietf.org/html/rfc7232#section-3.4">RFC7232</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.IntoIter.html" title='actix_http::http::header::IntoIter struct'>IntoIter</a></td><td class='docblock-short'><p>An owning iterator over the entries of a <code>HeaderMap</code>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.InvalidHeaderName.html" title='actix_http::http::header::InvalidHeaderName struct'>InvalidHeaderName</a></td><td class='docblock-short'><p>A possible error when converting a <code>HeaderName</code> from another type.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.InvalidHeaderNameBytes.html" title='actix_http::http::header::InvalidHeaderNameBytes struct'>InvalidHeaderNameBytes</a></td><td class='docblock-short'><p>A possible error when converting a <code>HeaderName</code> from another type.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.InvalidHeaderValue.html" title='actix_http::http::header::InvalidHeaderValue struct'>InvalidHeaderValue</a></td><td class='docblock-short'><p>A possible error when converting a <code>HeaderValue</code> from a string or byte
slice.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.InvalidHeaderValueBytes.html" title='actix_http::http::header::InvalidHeaderValueBytes struct'>InvalidHeaderValueBytes</a></td><td class='docblock-short'><p>A possible error when converting a <code>HeaderValue</code> from a string or byte
slice.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.Iter.html" title='actix_http::http::header::Iter struct'>Iter</a></td><td class='docblock-short'><p><code>HeaderMap</code> entry iterator.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.IterMut.html" title='actix_http::http::header::IterMut struct'>IterMut</a></td><td class='docblock-short'><p><code>HeaderMap</code> mutable entry iterator</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.Keys.html" title='actix_http::http::header::Keys struct'>Keys</a></td><td class='docblock-short'><p>An iterator over <code>HeaderMap</code> keys.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.LastModified.html" title='actix_http::http::header::LastModified struct'>LastModified</a></td><td class='docblock-short'><p><code>Last-Modified</code> header, defined in
<a href="http://tools.ietf.org/html/rfc7232#section-2.2">RFC7232</a></p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.OccupiedEntry.html" title='actix_http::http::header::OccupiedEntry struct'>OccupiedEntry</a></td><td class='docblock-short'><p>A view into a single occupied location in a <code>HeaderMap</code>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ToStrError.html" title='actix_http::http::header::ToStrError struct'>ToStrError</a></td><td class='docblock-short'><p>A possible error when converting a <code>HeaderValue</code> to a string representation.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.VacantEntry.html" title='actix_http::http::header::VacantEntry struct'>VacantEntry</a></td><td class='docblock-short'><p>A view into a single empty location in a <code>HeaderMap</code>.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ValueDrain.html" title='actix_http::http::header::ValueDrain struct'>ValueDrain</a></td><td class='docblock-short'><p>An drain iterator of all values associated with a single header name.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ValueIter.html" title='actix_http::http::header::ValueIter struct'>ValueIter</a></td><td class='docblock-short'><p>An iterator of all values associated with a single header name.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ValueIterMut.html" title='actix_http::http::header::ValueIterMut struct'>ValueIterMut</a></td><td class='docblock-short'><p>A mutable iterator of all values associated with a single header name.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.Values.html" title='actix_http::http::header::Values struct'>Values</a></td><td class='docblock-short'><p><code>HeaderMap</code> value iterator.</p>
</td></tr><tr class='module-item'><td><a class="struct" href="struct.ValuesMut.html" title='actix_http::http::header::ValuesMut struct'>ValuesMut</a></td><td class='docblock-short'><p><code>HeaderMap</code> mutable value iterator</p>
</td></tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
<table><tr class='module-item'><td><a class="enum" href="enum.CacheDirective.html" title='actix_http::http::header::CacheDirective enum'>CacheDirective</a></td><td class='docblock-short'><p><code>CacheControl</code> contains a list of these directives.</p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.ContentEncoding.html" title='actix_http::http::header::ContentEncoding enum'>ContentEncoding</a></td><td class='docblock-short'><p>Represents supported types of content encodings</p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.ContentRangeSpec.html" title='actix_http::http::header::ContentRangeSpec enum'>ContentRangeSpec</a></td><td class='docblock-short'><p>Content-Range, described in <a href="https://tools.ietf.org/html/rfc7233#section-4.2">RFC7233</a></p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.DispositionParam.html" title='actix_http::http::header::DispositionParam enum'>DispositionParam</a></td><td class='docblock-short'><p>Parameter in [<code>ContentDisposition</code>].</p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.DispositionType.html" title='actix_http::http::header::DispositionType enum'>DispositionType</a></td><td class='docblock-short'><p>The implied disposition of the content of the HTTP body.</p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.Entry.html" title='actix_http::http::header::Entry enum'>Entry</a></td><td class='docblock-short'><p>A view into a single location in a <code>HeaderMap</code>, which may be vacant or occupied.</p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.IfMatch.html" title='actix_http::http::header::IfMatch enum'>IfMatch</a></td><td class='docblock-short'><p><code>If-Match</code> header, defined in
<a href="https://tools.ietf.org/html/rfc7232#section-3.1">RFC7232</a></p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.IfNoneMatch.html" title='actix_http::http::header::IfNoneMatch enum'>IfNoneMatch</a></td><td class='docblock-short'><p><code>If-None-Match</code> header, defined in
<a href="https://tools.ietf.org/html/rfc7232#section-3.2">RFC7232</a></p>
</td></tr><tr class='module-item'><td><a class="enum" href="enum.IfRange.html" title='actix_http::http::header::IfRange enum'>IfRange</a></td><td class='docblock-short'><p><code>If-Range</code> header, defined in <a href="http://tools.ietf.org/html/rfc7233#section-3.2">RFC7233</a></p>
</td></tr></table><h2 id='constants' class='section-header'><a href="#constants">Constants</a></h2>
<table><tr class='module-item'><td><a class="constant" href="constant.ACCEPT.html" title='actix_http::http::header::ACCEPT constant'>ACCEPT</a></td><td class='docblock-short'><p>Advertises which content types the client is able to understand.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCEPT_CHARSET.html" title='actix_http::http::header::ACCEPT_CHARSET constant'>ACCEPT_CHARSET</a></td><td class='docblock-short'><p>Advertises which character set the client is able to understand.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCEPT_ENCODING.html" title='actix_http::http::header::ACCEPT_ENCODING constant'>ACCEPT_ENCODING</a></td><td class='docblock-short'><p>Advertises which content encoding the client is able to understand.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCEPT_LANGUAGE.html" title='actix_http::http::header::ACCEPT_LANGUAGE constant'>ACCEPT_LANGUAGE</a></td><td class='docblock-short'><p>Advertises which languages the client is able to understand.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCEPT_RANGES.html" title='actix_http::http::header::ACCEPT_RANGES constant'>ACCEPT_RANGES</a></td><td class='docblock-short'><p>Marker used by the server to advertise partial request support.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_ALLOW_CREDENTIALS.html" title='actix_http::http::header::ACCESS_CONTROL_ALLOW_CREDENTIALS constant'>ACCESS_CONTROL_ALLOW_CREDENTIALS</a></td><td class='docblock-short'><p>Preflight response indicating if the response to the request can be
exposed to the page.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_ALLOW_HEADERS.html" title='actix_http::http::header::ACCESS_CONTROL_ALLOW_HEADERS constant'>ACCESS_CONTROL_ALLOW_HEADERS</a></td><td class='docblock-short'><p>Preflight response indicating permitted HTTP headers.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_ALLOW_METHODS.html" title='actix_http::http::header::ACCESS_CONTROL_ALLOW_METHODS constant'>ACCESS_CONTROL_ALLOW_METHODS</a></td><td class='docblock-short'><p>Preflight header response indicating permitted access methods.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_ALLOW_ORIGIN.html" title='actix_http::http::header::ACCESS_CONTROL_ALLOW_ORIGIN constant'>ACCESS_CONTROL_ALLOW_ORIGIN</a></td><td class='docblock-short'><p>Indicates whether the response can be shared with resources with the
given origin.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_EXPOSE_HEADERS.html" title='actix_http::http::header::ACCESS_CONTROL_EXPOSE_HEADERS constant'>ACCESS_CONTROL_EXPOSE_HEADERS</a></td><td class='docblock-short'><p>Indicates which headers can be exposed as part of the response by
listing their names.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_MAX_AGE.html" title='actix_http::http::header::ACCESS_CONTROL_MAX_AGE constant'>ACCESS_CONTROL_MAX_AGE</a></td><td class='docblock-short'><p>Indicates how long the results of a preflight request can be cached.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_REQUEST_HEADERS.html" title='actix_http::http::header::ACCESS_CONTROL_REQUEST_HEADERS constant'>ACCESS_CONTROL_REQUEST_HEADERS</a></td><td class='docblock-short'><p>Informs the server which HTTP headers will be used when an actual
request is made.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ACCESS_CONTROL_REQUEST_METHOD.html" title='actix_http::http::header::ACCESS_CONTROL_REQUEST_METHOD constant'>ACCESS_CONTROL_REQUEST_METHOD</a></td><td class='docblock-short'><p>Informs the server know which HTTP method will be used when the actual
request is made.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.AGE.html" title='actix_http::http::header::AGE constant'>AGE</a></td><td class='docblock-short'><p>Indicates the time in seconds the object has been in a proxy cache.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ALLOW.html" title='actix_http::http::header::ALLOW constant'>ALLOW</a></td><td class='docblock-short'><p>Lists the set of methods support by a resource.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ALT_SVC.html" title='actix_http::http::header::ALT_SVC constant'>ALT_SVC</a></td><td class='docblock-short'><p>Advertises the availability of alternate services to clients.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.AUTHORIZATION.html" title='actix_http::http::header::AUTHORIZATION constant'>AUTHORIZATION</a></td><td class='docblock-short'><p>Contains the credentials to authenticate a user agent with a server.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CACHE_CONTROL.html" title='actix_http::http::header::CACHE_CONTROL constant'>CACHE_CONTROL</a></td><td class='docblock-short'><p>Specifies directives for caching mechanisms in both requests and
responses.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONNECTION.html" title='actix_http::http::header::CONNECTION constant'>CONNECTION</a></td><td class='docblock-short'><p>Controls whether or not the network connection stays open after the
current transaction finishes.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_DISPOSITION.html" title='actix_http::http::header::CONTENT_DISPOSITION constant'>CONTENT_DISPOSITION</a></td><td class='docblock-short'><p>Indicates if the content is expected to be displayed inline.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_ENCODING.html" title='actix_http::http::header::CONTENT_ENCODING constant'>CONTENT_ENCODING</a></td><td class='docblock-short'><p>Used to compress the media-type.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_LANGUAGE.html" title='actix_http::http::header::CONTENT_LANGUAGE constant'>CONTENT_LANGUAGE</a></td><td class='docblock-short'><p>Used to describe the languages intended for the audience.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_LENGTH.html" title='actix_http::http::header::CONTENT_LENGTH constant'>CONTENT_LENGTH</a></td><td class='docblock-short'><p>Indicates the size fo the entity-body.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_LOCATION.html" title='actix_http::http::header::CONTENT_LOCATION constant'>CONTENT_LOCATION</a></td><td class='docblock-short'><p>Indicates an alternate location for the returned data.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_RANGE.html" title='actix_http::http::header::CONTENT_RANGE constant'>CONTENT_RANGE</a></td><td class='docblock-short'><p>Indicates where in a full body message a partial message belongs.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_SECURITY_POLICY.html" title='actix_http::http::header::CONTENT_SECURITY_POLICY constant'>CONTENT_SECURITY_POLICY</a></td><td class='docblock-short'><p>Allows controlling resources the user agent is allowed to load for a
given page.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_SECURITY_POLICY_REPORT_ONLY.html" title='actix_http::http::header::CONTENT_SECURITY_POLICY_REPORT_ONLY constant'>CONTENT_SECURITY_POLICY_REPORT_ONLY</a></td><td class='docblock-short'><p>Allows experimenting with policies by monitoring their effects.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.CONTENT_TYPE.html" title='actix_http::http::header::CONTENT_TYPE constant'>CONTENT_TYPE</a></td><td class='docblock-short'><p>Used to indicate the media type of the resource.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.COOKIE.html" title='actix_http::http::header::COOKIE constant'>COOKIE</a></td><td class='docblock-short'><p>Contains stored HTTP cookies previously sent by the server with the
Set-Cookie header.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.DATE.html" title='actix_http::http::header::DATE constant'>DATE</a></td><td class='docblock-short'><p>Contains the date and time at which the message was originated.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.DNT.html" title='actix_http::http::header::DNT constant'>DNT</a></td><td class='docblock-short'><p>Indicates the client's tracking preference.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ETAG.html" title='actix_http::http::header::ETAG constant'>ETAG</a></td><td class='docblock-short'><p>Identifier for a specific version of a resource.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.EXPECT.html" title='actix_http::http::header::EXPECT constant'>EXPECT</a></td><td class='docblock-short'><p>Indicates expectations that need to be fulfilled by the server in order
to properly handle the request.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.EXPIRES.html" title='actix_http::http::header::EXPIRES constant'>EXPIRES</a></td><td class='docblock-short'><p>Contains the date/time after which the response is considered stale.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.FORWARDED.html" title='actix_http::http::header::FORWARDED constant'>FORWARDED</a></td><td class='docblock-short'><p>Contains information from the client-facing side of proxy servers that
is altered or lost when a proxy is involved in the path of the request.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.FROM.html" title='actix_http::http::header::FROM constant'>FROM</a></td><td class='docblock-short'><p>Contains an Internet email address for a human user who controls the
requesting user agent.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.HOST.html" title='actix_http::http::header::HOST constant'>HOST</a></td><td class='docblock-short'><p>Specifies the domain name of the server and (optionally) the TCP port
number on which the server is listening.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.IF_MATCH.html" title='actix_http::http::header::IF_MATCH constant'>IF_MATCH</a></td><td class='docblock-short'><p>Makes a request conditional based on the E-Tag.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.IF_MODIFIED_SINCE.html" title='actix_http::http::header::IF_MODIFIED_SINCE constant'>IF_MODIFIED_SINCE</a></td><td class='docblock-short'><p>Makes a request conditional based on the modification date.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.IF_NONE_MATCH.html" title='actix_http::http::header::IF_NONE_MATCH constant'>IF_NONE_MATCH</a></td><td class='docblock-short'><p>Makes a request conditional based on the E-Tag.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.IF_RANGE.html" title='actix_http::http::header::IF_RANGE constant'>IF_RANGE</a></td><td class='docblock-short'><p>Makes a request conditional based on range.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.IF_UNMODIFIED_SINCE.html" title='actix_http::http::header::IF_UNMODIFIED_SINCE constant'>IF_UNMODIFIED_SINCE</a></td><td class='docblock-short'><p>Makes the request conditional based on the last modification date.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.LAST_MODIFIED.html" title='actix_http::http::header::LAST_MODIFIED constant'>LAST_MODIFIED</a></td><td class='docblock-short'><p>Content-Types that are acceptable for the response.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.LINK.html" title='actix_http::http::header::LINK constant'>LINK</a></td><td class='docblock-short'><p>Allows the server to point an interested client to another resource
containing metadata about the requested resource.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.LOCATION.html" title='actix_http::http::header::LOCATION constant'>LOCATION</a></td><td class='docblock-short'><p>Indicates the URL to redirect a page to.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.MAX_FORWARDS.html" title='actix_http::http::header::MAX_FORWARDS constant'>MAX_FORWARDS</a></td><td class='docblock-short'><p>Indicates the max number of intermediaries the request should be sent
through.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.ORIGIN.html" title='actix_http::http::header::ORIGIN constant'>ORIGIN</a></td><td class='docblock-short'><p>Indicates where a fetch originates from.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.PRAGMA.html" title='actix_http::http::header::PRAGMA constant'>PRAGMA</a></td><td class='docblock-short'><p>HTTP/1.0 header usually used for backwards compatibility.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.PROXY_AUTHENTICATE.html" title='actix_http::http::header::PROXY_AUTHENTICATE constant'>PROXY_AUTHENTICATE</a></td><td class='docblock-short'><p>Defines the authentication method that should be used to gain access to
a proxy.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.PROXY_AUTHORIZATION.html" title='actix_http::http::header::PROXY_AUTHORIZATION constant'>PROXY_AUTHORIZATION</a></td><td class='docblock-short'><p>Contains the credentials to authenticate a user agent to a proxy server.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.PUBLIC_KEY_PINS.html" title='actix_http::http::header::PUBLIC_KEY_PINS constant'>PUBLIC_KEY_PINS</a></td><td class='docblock-short'><p>Associates a specific cryptographic public key with a certain server.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.PUBLIC_KEY_PINS_REPORT_ONLY.html" title='actix_http::http::header::PUBLIC_KEY_PINS_REPORT_ONLY constant'>PUBLIC_KEY_PINS_REPORT_ONLY</a></td><td class='docblock-short'><p>Sends reports of pinning violation to the report-uri specified in the
header.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.RANGE.html" title='actix_http::http::header::RANGE constant'>RANGE</a></td><td class='docblock-short'><p>Indicates the part of a document that the server should return.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.REFERER.html" title='actix_http::http::header::REFERER constant'>REFERER</a></td><td class='docblock-short'><p>Contains the address of the previous web page from which a link to the
currently requested page was followed.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.REFERRER_POLICY.html" title='actix_http::http::header::REFERRER_POLICY constant'>REFERRER_POLICY</a></td><td class='docblock-short'><p>Governs which referrer information should be included with requests
made.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.REFRESH.html" title='actix_http::http::header::REFRESH constant'>REFRESH</a></td><td class='docblock-short'><p>Informs the web browser that the current page or frame should be
refreshed.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.RETRY_AFTER.html" title='actix_http::http::header::RETRY_AFTER constant'>RETRY_AFTER</a></td><td class='docblock-short'><p>The Retry-After response HTTP header indicates how long the user agent
should wait before making a follow-up request. There are two main cases
this header is used:</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.SEC_WEBSOCKET_ACCEPT.html" title='actix_http::http::header::SEC_WEBSOCKET_ACCEPT constant'>SEC_WEBSOCKET_ACCEPT</a></td><td class='docblock-short'><p>The |Sec-WebSocket-Accept| header field is used in the WebSocket
opening handshake. It is sent from the server to the client to
confirm that the server is willing to initiate the WebSocket
connection.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.SEC_WEBSOCKET_EXTENSIONS.html" title='actix_http::http::header::SEC_WEBSOCKET_EXTENSIONS constant'>SEC_WEBSOCKET_EXTENSIONS</a></td><td class='docblock-short'><p>The |Sec-WebSocket-Extensions| header field is used in the WebSocket
opening handshake. It is initially sent from the client to the
server, and then subsequently sent from the server to the client, to
agree on a set of protocol-level extensions to use for the duration
of the connection.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.SEC_WEBSOCKET_KEY.html" title='actix_http::http::header::SEC_WEBSOCKET_KEY constant'>SEC_WEBSOCKET_KEY</a></td><td class='docblock-short'><p>The |Sec-WebSocket-Key| header field is used in the WebSocket opening
handshake. It is sent from the client to the server to provide part
of the information used by the server to prove that it received a
valid WebSocket opening handshake. This helps ensure that the server
does not accept connections from non-WebSocket clients (e.g., HTTP
clients) that are being abused to send data to unsuspecting WebSocket
servers.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.SEC_WEBSOCKET_PROTOCOL.html" title='actix_http::http::header::SEC_WEBSOCKET_PROTOCOL constant'>SEC_WEBSOCKET_PROTOCOL</a></td><td class='docblock-short'><p>The |Sec-WebSocket-Protocol| header field is used in the WebSocket
opening handshake. It is sent from the client to the server and back
from the server to the client to confirm the subprotocol of the
connection. This enables scripts to both select a subprotocol and be
sure that the server agreed to serve that subprotocol.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.SEC_WEBSOCKET_VERSION.html" title='actix_http::http::header::SEC_WEBSOCKET_VERSION constant'>SEC_WEBSOCKET_VERSION</a></td><td class='docblock-short'><p>The |Sec-WebSocket-Version| header field is used in the WebSocket
opening handshake. It is sent from the client to the server to
indicate the protocol version of the connection. This enables
servers to correctly interpret the opening handshake and subsequent
data being sent from the data, and close the connection if the server
cannot interpret that data in a safe manner.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.SERVER.html" title='actix_http::http::header::SERVER constant'>SERVER</a></td><td class='docblock-short'><p>Contains information about the software used by the origin server to
handle the request.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.SET_COOKIE.html" title='actix_http::http::header::SET_COOKIE constant'>SET_COOKIE</a></td><td class='docblock-short'><p>Used to send cookies from the server to the user agent.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.STRICT_TRANSPORT_SECURITY.html" title='actix_http::http::header::STRICT_TRANSPORT_SECURITY constant'>STRICT_TRANSPORT_SECURITY</a></td><td class='docblock-short'><p>Tells the client to communicate with HTTPS instead of using HTTP.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.TE.html" title='actix_http::http::header::TE constant'>TE</a></td><td class='docblock-short'><p>Informs the server of transfer encodings willing to be accepted as part
of the response.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.TRAILER.html" title='actix_http::http::header::TRAILER constant'>TRAILER</a></td><td class='docblock-short'><p>Allows the sender to include additional fields at the end of chunked
messages.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.TRANSFER_ENCODING.html" title='actix_http::http::header::TRANSFER_ENCODING constant'>TRANSFER_ENCODING</a></td><td class='docblock-short'><p>Specifies the form of encoding used to safely transfer the entity to the
client.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.UPGRADE.html" title='actix_http::http::header::UPGRADE constant'>UPGRADE</a></td><td class='docblock-short'><p>Used as part of the exchange to upgrade the protocol.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.UPGRADE_INSECURE_REQUESTS.html" title='actix_http::http::header::UPGRADE_INSECURE_REQUESTS constant'>UPGRADE_INSECURE_REQUESTS</a></td><td class='docblock-short'><p>Sends a signal to the server expressing the client’s preference for an
encrypted and authenticated response.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.USER_AGENT.html" title='actix_http::http::header::USER_AGENT constant'>USER_AGENT</a></td><td class='docblock-short'><p>Contains a string that allows identifying the requesting client's
software.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.VARY.html" title='actix_http::http::header::VARY constant'>VARY</a></td><td class='docblock-short'><p>Determines how to match future requests with cached responses.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.VIA.html" title='actix_http::http::header::VIA constant'>VIA</a></td><td class='docblock-short'><p>Added by proxies to track routing.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.WARNING.html" title='actix_http::http::header::WARNING constant'>WARNING</a></td><td class='docblock-short'><p>General HTTP header contains information about possible problems with
the status of the message.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.WWW_AUTHENTICATE.html" title='actix_http::http::header::WWW_AUTHENTICATE constant'>WWW_AUTHENTICATE</a></td><td class='docblock-short'><p>Defines the authentication method that should be used to gain access to
a resource.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.X_CONTENT_TYPE_OPTIONS.html" title='actix_http::http::header::X_CONTENT_TYPE_OPTIONS constant'>X_CONTENT_TYPE_OPTIONS</a></td><td class='docblock-short'><p>Marker used by the server to indicate that the MIME types advertised in
the <code>content-type</code> headers should not be changed and be followed.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.X_DNS_PREFETCH_CONTROL.html" title='actix_http::http::header::X_DNS_PREFETCH_CONTROL constant'>X_DNS_PREFETCH_CONTROL</a></td><td class='docblock-short'><p>Controls DNS prefetching.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.X_FRAME_OPTIONS.html" title='actix_http::http::header::X_FRAME_OPTIONS constant'>X_FRAME_OPTIONS</a></td><td class='docblock-short'><p>Indicates whether or not a browser should be allowed to render a page in
a frame.</p>
</td></tr><tr class='module-item'><td><a class="constant" href="constant.X_XSS_PROTECTION.html" title='actix_http::http::header::X_XSS_PROTECTION constant'>X_XSS_PROTECTION</a></td><td class='docblock-short'><p>Stop pages from loading when an XSS attack is detected.</p>
</td></tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
<table><tr class='module-item'><td><a class="trait" href="trait.AsHeaderName.html" title='actix_http::http::header::AsHeaderName trait'>AsHeaderName</a></td><td class='docblock-short'><p>A marker trait used to identify values that can be used as search keys
to a <code>HeaderMap</code>.</p>
</td></tr><tr class='module-item'><td><a class="trait" href="trait.Header.html" title='actix_http::http::header::Header trait'>Header</a></td><td class='docblock-short'><p>A trait for any object that will represent a header field and value.</p>
</td></tr><tr class='module-item'><td><a class="trait" href="trait.IntoHeaderName.html" title='actix_http::http::header::IntoHeaderName trait'>IntoHeaderName</a></td><td class='docblock-short'><p>A marker trait used to identify values that can be used as insert keys
to a <code>HeaderMap</code>.</p>
</td></tr><tr class='module-item'><td><a class="trait" href="trait.IntoHeaderValue.html" title='actix_http::http::header::IntoHeaderValue trait'>IntoHeaderValue</a></td><td class='docblock-short'><p>A trait for any object that can be Converted to a <code>HeaderValue</code></p>
</td></tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
<table><tr class='module-item'><td><a class="fn" href="fn.http_percent_encode.html" title='actix_http::http::header::http_percent_encode fn'>http_percent_encode</a></td><td class='docblock-short'><p>Percent encode a sequence of bytes with a character set defined in
<a href="https://tools.ietf.org/html/rfc5987#section-3.2">https://tools.ietf.org/html/rfc5987#section-3.2</a></p>
</td></tr><tr class='module-item'><td><a class="fn" href="fn.parse_extended_value.html" title='actix_http::http::header::parse_extended_value fn'>parse_extended_value</a></td><td class='docblock-short'><p>Parses extended header parameter values (<code>ext-value</code>), as defined in
<a href="https://tools.ietf.org/html/rfc5987#section-3.2">RFC 5987</a>.</p>
</td></tr></table></section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../../";window.currentCrate = "actix_http";</script><script src="../../../aliases.js"></script><script src="../../../main.js"></script><script defer src="../../../search-index.js"></script></body></html>
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