<!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"type="text/css"href="../normalize.css"><linkrel="stylesheet"type="text/css"href="../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../ayu.css"disabled><linkrel="stylesheet"type="text/css"href="../dark.css"disabled><linkrel="stylesheet"type="text/css"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>
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<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"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#81-451">source</a></span><ahref="#impl"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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#86-111">source</a></span><ahref="#method.permissive"class="anchor"></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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#116-122">source</a></span><ahref="#method.allow_any_origin"class="anchor"></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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#148-175">source</a></span><ahref="#method.allowed_origin"class="anchor"></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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#201-207">source</a></span><ahref="#method.allow_any_method"class="anchor"></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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#244-250">source</a></span><ahref="#method.allow_any_header"class="anchor"></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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#289-316">source</a></span><ahref="#method.allowed_headers"class="anchor"></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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#321-327">source</a></span><ahref="#method.expose_any_header"class="anchor"></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 any header is accepted.</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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#336-362">source</a></span><ahref="#method.expose_headers"class="anchor"></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"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#370-376">source</a></span><ahref="#method.max_age"class="anchor"></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></div><h2id="trait-implementations"class="small-section-header">Trait Implementations<ahref="#trait-implementations"class="anchor"></a></h2><divid="trait-implementations-list"><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-Debug"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#75">source</a></span><ahref="#impl-Debug"class="anchor"></a><h3class="code-header in-band">impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for <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.fmt"class="method trait-impl has-srclink"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#75">source</a></span><ahref="#method.fmt"class="anchor"></a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt"class="fnname">fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="type"href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html"title="type core::fmt::Result">Result</a></h4></section></summary><divclass='docblock'><p>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-Transform%3CS%2C%20ServiceRequest%3E"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#486-545">source</a></span><ahref="#impl-Transform%3CS%2C%20ServiceRequest%3E"class="anchor"></a><h3class="code-header in-band">impl<S, B> Transform<S, ServiceRequest> for <aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a><spanclass="where fmt-newline">where<br> S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error>,<br> S::Future: 'static,<br> B: MessageBody + 'static, </span></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Response"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Response"class="anchor"></a><h4class="code-header">type <aclass="associatedtype">Response</a> = ServiceResponse<EitherBody<B, BoxBody>></h4></section></summary><divclass='docblock'><p>Responses produced by the service.</p>
</div></details><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Error"class="anchor"></a><h4class="code-header">type <aclass="associatedtype">Error</a> = Error</h4></section></summary><divclass='docblock'><p>Errors produced by the service.</p>
</div></details><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.InitError"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.InitError"class="anchor"></a><h4class="code-header">type <aclass="associatedtype">InitError</a> = <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a></h4></section></summary><divclass='docblock'><p>Errors produced while building a transform service.</p>
</div></details><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Transform"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Transform"class="anchor"></a><h4class="code-header">type <aclass="associatedtype">Transform</a> = CorsMiddleware<S></h4></section></summary><divclass='docblock'><p>The <code>TransformService</code> value created by this factory</p>
</div></details><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Future"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Future"class="anchor"></a><h4class="code-header">type <aclass="associatedtype">Future</a> = Ready<<aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<<aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a> as Transform<S, ServiceRequest>>::Transform, <<aclass="struct"href="struct.Cors.html"title="struct actix_cors::Cors">Cors</a> as Transform<S, ServiceRequest>>::InitError>></h4></section></summary><divclass='docblock'><p>The future response value.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.new_transform"class="method trait-impl has-srclink"><spanclass="rightside"><aclass="srclink"href="../src/actix_cors/builder.rs.html#499-544">source</a></span><ahref="#method.new_transform"class="anchor"></a><h4class="code-header">fn <aclass="fnname">new_transform</a>(&self, service: S) -> Self::Future</h4></section></summary><divclass='docblock'><p>Creates and returns a new Transform component, asynchronously</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Instrument"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.35/src/tracing/instrument.rs.html#276">source</a></span><ahref="#impl-Instrument"class="anchor"></a><h3class="code-header in-band">impl<T><aclass="trait"href="https://docs.rs/tracing/0.1.35/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"><spanclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.35/src/tracing/instrument.rs.html#82">source</a></span><ahref="#method.instrument"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.35/tracing/instrument/trait.Instrument.html#method.instrument"class="fnname">instrument</a>(self, span: <aclass="struct"href="https://docs.rs/tracing/0.1.35/tracing/span/struct.Span.html"title="struct tracing::span::Span">Span</a>) -><aclass="struct"href="https://docs.rs/tracing/0.1.35/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'><p>Instruments this type with the provided <ahref="https://docs.rs/tracing/0.1.35/tracing/span/struct.Span.html"title="Span"><code>Span</code></a>, returning an
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.in_current_span"class="method trait-impl has-srclink"><spanclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.35/src/tracing/instrument.rs.html#121">source</a></span><ahref="#method.in_current_span"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.35/tracing/instrument/trait.Instrument.html#method.in_current_span"class="fnname">in_current_span</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.35/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'><p>Instruments this type with the <ahref="https://docs.rs/tracing/0.1.35/tracing/span/struct.Span.html#method.current">current</a><ahref="https://docs.rs/tracing/0.1.35/tracing/span/struct.Span.html"><code>Span</code></a>, returning an
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#598-607">source</a></span><ahref="#impl-TryFrom%3CU%3E"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-1"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Error-1"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'><p>The type returned in the event of a conversion error.</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#583-592">source</a></span><ahref="#impl-TryInto%3CU%3E"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="trait core::convert::TryInto">TryInto</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</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.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<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'><p>The type returned in the event of a conversion error.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.with_current_subscriber"class="method trait-impl has-srclink"><spanclass="rightside"><aclass="srclink"href="https://docs.rs/tracing/0.1.35/src/tracing/instrument.rs.html#221">source</a></span><ahref="#method.with_current_subscriber"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.35/tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber"class="fnname">with_current_subscriber</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.35/tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><divclass='docblock'><p>Attaches the current <ahref="https://docs.rs/tracing/0.1.35/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
