<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Builder for CORS middleware."><metaname="keywords"content="rust, rustlang, rust-lang, Cors"><title>Cors in actix_cors - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceSerif4-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../FiraSans-Regular.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../FiraSans-Medium.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceCodePro-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceSerif4-Bold.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../SourceCodePro-Semibold.ttf.woff2"><linkrel="stylesheet"href="../normalize.css"><linkrel="stylesheet"href="../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"href="../ayu.css"disabled><linkrel="stylesheet"href="../dark.css"disabled><linkrel="stylesheet"href="../light.css"id="themeStyle"><scriptid="default-settings"></script><scriptsrc="../storage.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../main.js"></script><noscript><linkrel="stylesheet"href="../noscript.css"></noscript><linkrel="icon"href="https://actix.rs/favicon.ico"></head><bodyclass="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="sidebar-logo"href="../actix_cors/index.html"><divclass="logo-container"><imgsrc="https://actix.rs/img/logo.png"alt="logo"></div></a><h2class="location"></h2></nav><navclass="sidebar"><aclass="sidebar-logo"href="../actix_cors/index.html"><divclass="logo-container">
<imgsrc="https://actix.rs/img/logo.png"alt="logo"></a><navclass="sub"><formclass="search-form"><divclass="search-container"><span></span><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"title="help"tabindex="-1"><buttontype="button">?</button></div><divid="settings-menu"tabindex="-1"><ahref="../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../wheel.svg"></a></div></div></form></nav></div><sectionid="main-content"class="content"><divclass="main-heading"><h1class="fqn"><spanclass="in-band">Struct <ahref="index.html">actix_cors</a>::<wbr><aclass="struct"href="#">Cors</a><buttonid="copy-path"onclick="copy_path(this)"title="Copy item path to clipboard"><imgsrc="../clipboard.svg"width="19"height="18"alt="Copy item path"></button></span></h1><spanclass="out-of-band"><aclass="srclink"href="../src/actix_cors/builder.rs.html#76-79">source</a> · <aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass="inner">−</span>]</a></span></div><divclass="item-decl"><preclass="rust struct"><code>pub struct Cors { /* private fields */ }</code></pre></div><detailsclass="rustdoc-toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>Builder for CORS middleware.</p>
<p>To construct a CORS middleware, call <ahref="struct.Cors.html#method.default"title="Cors::default()"><code>Cors::default()</code></a> to create a blank, restrictive builder.
<p>The alternative <ahref="struct.Cors.html#method.permissive"title="Cors::permissive()"><code>Cors::permissive()</code></a> constructor is available for local development, allowing
</div></details><h2id="implementations"class="small-section-header">Implementations<ahref="#implementations"class="anchor"></a></h2><divid="implementations-list"><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-Cors"class="impl has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#81-470">source</a><ahref="#impl-Cors"class="anchor"></a><h3class="code-header in-band">impl <aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.permissive"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#86-112">source</a><h4class="code-header">pub fn <ahref="#method.permissive"class="fnname">permissive</a>() -> Self</h4></section></summary><divclass="docblock"><p>A very permissive set of default for quick development. Not recommended for production use.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.allow_any_origin"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#117-123">source</a><h4class="code-header">pub fn <ahref="#method.allow_any_origin"class="fnname">allow_any_origin</a>(self) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a></h4></section></summary><divclass="docblock"><p>Resets allowed origin list to a state where any origin is accepted.</p>
<p>See <ahref="struct.Cors.html#method.allowed_origin"title="Cors::allowed_origin"><code>Cors::allowed_origin</code></a> for more info on allowed origins.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.allowed_origin"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#149-176">source</a><h4class="code-header">pub fn <ahref="#method.allowed_origin"class="fnname">allowed_origin</a>(self, origin: &<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a></h4></section></summary><divclass="docblock"><p>Add an origin that is allowed to make requests.</p>
<li>If supplied origin is a wildcard (<code>*</code>). <ahref="struct.Cors.html#method.send_wildcard"title="Cors::send_wildcard"><code>Cors::send_wildcard</code></a> should be used instead.</li>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.allow_any_method"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#202-208">source</a><h4class="code-header">pub fn <ahref="#method.allow_any_method"class="fnname">allow_any_method</a>(self) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a></h4></section></summary><divclass="docblock"><p>Resets allowed methods list to all methods.</p>
<p>See <ahref="struct.Cors.html#method.allowed_methods"title="Cors::allowed_methods"><code>Cors::allowed_methods</code></a> for more info on allowed methods.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.allow_any_header"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#245-251">source</a><h4class="code-header">pub fn <ahref="#method.allow_any_header"class="fnname">allow_any_header</a>(self) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a></h4></section></summary><divclass="docblock"><p>Resets allowed request header list to a state where any header is accepted.</p>
<p>See <ahref="struct.Cors.html#method.allowed_headers"title="Cors::allowed_headers"><code>Cors::allowed_headers</code></a> for more info on allowed request headers.</p>
<p>See <ahref="struct.Cors.html#method.allowed_headers"title="Cors::allowed_headers"><code>Cors::allowed_headers</code></a> for more info on allowed request headers.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.allowed_headers"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#290-317">source</a><h4class="code-header">pub fn <ahref="#method.allowed_headers"class="fnname">allowed_headers</a><U, H>(self, headers: U) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a><spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html"title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = H>,<br> H: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><<aclass="struct"href="https://docs.rs/http/0.2.8/http/header/name/struct.HeaderName.html"title="struct http::header::name::HeaderName">HeaderName</a>>,<br> <H as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><<aclass="struct"href="https://docs.rs/http/0.2.8/http/header/name/struct.HeaderName.html"title="struct http::header::name::HeaderName">HeaderName</a>>>::<aclass="associatedtype"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error"title="type core::convert::TryInto::Error">Error</a>: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="https://docs.rs/http/0.2.8/http/error/struct.Error.html"title="struct http::error::Error">HttpError</a>>,</span></h4></section></summary><divclass="docblock"><p>Set a list of request header field names which can be used when this resource is accessed by
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.expose_any_header"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#322-328">source</a><h4class="code-header">pub fn <ahref="#method.expose_any_header"class="fnname">expose_any_header</a>(self) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a></h4></section></summary><divclass="docblock"><p>Resets exposed response header list to a state where all headers are exposed.</p>
<p>See <ahref="struct.Cors.html#method.expose_headers"title="Cors::expose_headers"><code>Cors::expose_headers</code></a> for more info on exposed response headers.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.expose_headers"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#337-363">source</a><h4class="code-header">pub fn <ahref="#method.expose_headers"class="fnname">expose_headers</a><U, H>(self, headers: U) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a><spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html"title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = H>,<br> H: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><<aclass="struct"href="https://docs.rs/http/0.2.8/http/header/name/struct.HeaderName.html"title="struct http::header::name::HeaderName">HeaderName</a>>,<br> <H as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><<aclass="struct"href="https://docs.rs/http/0.2.8/http/header/name/struct.HeaderName.html"title="struct http::header::name::HeaderName">HeaderName</a>>>::<aclass="associatedtype"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error"title="type core::convert::TryInto::Error">Error</a>: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="struct"href="https://docs.rs/http/0.2.8/http/error/struct.Error.html"title="struct http::error::Error">HttpError</a>>,</span></h4></section></summary><divclass="docblock"><p>Set a list of headers which are safe to expose to the API of a CORS API specification.
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.max_age"class="method has-srclink"><aclass="srclink rightside"href="../src/actix_cors/builder.rs.html#371-377">source</a><h4class="code-header">pub fn <ahref="#method.max_age"class="fnname">max_age</a>(self, max_age: impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><<aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>>>) -><aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a></h4></section></summary><divclass="docblock"><p>Set a maximum time (in seconds) for which this CORS request may be cached. This value is set
as the <code>Access-Control-Max-Age</code> header as specified in the <ahref="https://fetch.spec.whatwg.org/#http-cors-protocol">Fetch Standard CORS protocol</a>.</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Instrument-for-Cors"class="impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.36/src/tracing/instrument.rs.html#276">source</a><ahref="#impl-Instrument-for-Cors"class="anchor"></a><h3class="code-header in-band">impl<T><aclass="trait"href="https://docs.rs/tracing/0.1.36/tracing/instrument/trait.Instrument.html"title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.instrument"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.36/src/tracing/instrument.rs.html#82">source</a><ahref="#method.instrument"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.36/tracing/instrument/trait.Instrument.html#method.instrument"class="fnname">instrument</a>(self, span: <aclass="struct"href="https://docs.rs/tracing/0.1.36/tracing/span/struct.Span.html"title="struct tracing::span::Span">Span</a>) -><aclass="struct"href="https://docs.rs/tracing/0.1.36/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the provided <ahref="https://docs.rs/tracing/0.1.36/tracing/span/struct.Span.html"title="Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <ahref="https://docs.rs/tracing/0.1.36/tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.in_current_span"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.36/src/tracing/instrument.rs.html#121">source</a><ahref="#method.in_current_span"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.36/tracing/instrument/trait.Instrument.html#method.in_current_span"class="fnname">in_current_span</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.36/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the <ahref="https://docs.rs/tracing/0.1.36/tracing/span/struct.Span.html#method.current">current</a><ahref="https://docs.rs/tracing/0.1.36/tracing/span/struct.Span.html"><code>Span</code></a>, returning an
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Same%3CT%3E-for-Cors"class="impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/typenum/1.15.0/src/typenum/type_operators.rs.html#34">source</a><ahref="#impl-Same%3CT%3E-for-Cors"class="anchor"></a><h3class="code-header in-band">impl<T><aclass="trait"href="https://docs.rs/typenum/1.15.0/typenum/type_operators/trait.Same.html"title="trait typenum::type_operators::Same">Same</a><T> for T</h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Output"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Output"class="anchor"></a><h4class="code-header">type <ahref="https://docs.rs/typenum/1.15.0/typenum/type_operators/trait.Same.html#associatedtype.Output"class="associatedtype">Output</a> = T</h4></section></summary><divclass='docblock'>Should always be <code>Self</code></div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-Cors"class="impl has-srclink"><aclass="srclink rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#601">source</a><ahref="#impl-TryFrom%3CU%3E-for-Cors"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T<spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>,</span></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Error-2"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Error-2"class="anchor"></a><h4class="code-header">type <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'>The type returned in the event of a conversion error.</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.try_from"class="method trait-impl has-srclink"><spanclass="rightside"><spanclass="since"title="const unstable">const: <ahref="https://github.com/rust-lang/rust/issues/88674"title="Tracking issue for const_convert">unstable</a></span> · <aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#607">source</a></span><ahref="#method.try_from"class="anchor"></a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from"class="fnname">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="associatedtype"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><divclass='docblock'>Performs the conversion.</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-Cors"class="impl has-srclink"><aclass="srclink rightside"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#586">source</a><ahref="#impl-TryInto%3CU%3E-for-Cors"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="traitcore:
<ahref="https://docs.rs/tracing/0.1.36/tracing/instrument/struct.WithDispatch.html"title="WithDispatch"><code>WithDispatch</code></a> wrapper. <ahref="https://docs.rs/tracing/0.1.36/tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.with_current_subscriber"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.36/src/tracing/instrument.rs.html#221">source</a><ahref="#method.with_current_subscriber"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.36/tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber"class="fnname">with_current_subscriber</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.36/tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><divclass='docblock'>Attaches the current <ahref="https://docs.rs/tracing/0.1.36/tracing/dispatcher/index.html#setting-the-default-subscriber">default</a><ahref="https://docs.rs/tracing-core/0.1.22/tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a
