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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="Middleware for registering custom status code based error handlers."><title>ErrorHandlers in actix_web::middleware - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-dd39b87e5fcfba68.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="actix_web" data-themes="" data-resource-suffix="" data-rustdoc-version="1.80.0-nightly (bdbbb6c6a 2024-05-26)" data-channel="nightly" data-search-js="search-d52510db62a78183.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-118b08c4c78b968e.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-20a3ad099b048cf2.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-df360f571f6edeae.css"></noscript><link rel="icon" href="https://actix.rs/favicon.ico"></head><body class="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button><a class="logo-container" href="../../actix_web/index.html"><img src="https://actix.rs/img/logo.png" alt=""></a></nav><nav class="sidebar"><div class="sidebar-crate"><a class="logo-container" href="../../actix_web/index.html"><img src="https://actix.rs/img/logo.png" alt="logo"></a><h2><a href="../../actix_web/index.html">actix_web</a><span class="version">4.6.0</span></h2></div><h2 class="location"><a href="#">ErrorHandlers</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.default_handler">default_handler</a></li><li><a href="#method.default_handler_client">default_handler_client</a></li><li><a href="#method.default_handler_server">default_handler_server</a></li><li><a href="#method.handler">handler</a></li><li><a href="#method.new">new</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Default-for-ErrorHandlers%3CB%3E">Default</a></li><li><a href="#impl-Transform%3CS,+ServiceRequest%3E-for-ErrorHandlers%3CB%3E">Transform<S, ServiceRequest></a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-RefUnwindSafe-for-ErrorHandlers%3CB%3E">!RefUnwindSafe</a></li><li><a href="#impl-Send-for-ErrorHandlers%3CB%3E">!Send</a></li><li><a href="#impl-Sync-for-ErrorHandlers%3CB%3E">!Sync</a></li><li><a href="#impl-UnwindSafe-for-ErrorHandlers%3CB%3E">!UnwindSafe</a></li><li><a href="#impl-Freeze-for-ErrorHandlers%3CB%3E">Freeze</a></li><li><a href="#impl-Unpin-for-ErrorHandlers%3CB%3E">Unpin</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-T">From<T></a></li><li><a href="#impl-Instrument-for-T">Instrument</a></li><li><a href="#impl-Into%3CU%3E-for-T">Into<U></a></li><li><a href="#impl-Same-for-T">Same</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto<U></a></li><li><a href="#impl-VZip%3CV%3E-for-T">VZip<V></a></li><li><a href="#impl-WithSubscriber-for-T">WithSubscriber</a></li></ul></section><h2><a href="index.html">In actix_web::middleware</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Struct <a href="../index.html">actix_web</a>::<wbr><a href="index.html">middleware</a>::<wbr><a class="struct" href="#">ErrorHandlers</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><a class="src" href="../../src/actix_web/middleware/err_handlers.rs.html#182-186">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub struct ErrorHandlers<B> { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Middleware for registering custom status code based error handlers.</p>
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<p>Register handlers with the <a href="struct.ErrorHandlers.html#method.handler" title="method actix_web::middleware::ErrorHandlers::handler"><code>ErrorHandlers::handler()</code></a> method to register a custom error handler
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for a given status code. Handlers can modify existing responses or create completely new ones.</p>
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<p>To register a default handler, use the <a href="struct.ErrorHandlers.html#method.default_handler" title="method actix_web::middleware::ErrorHandlers::default_handler"><code>ErrorHandlers::default_handler()</code></a> method. This
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handler will be used only if a response has an error status code (400-599) that isn’t covered by
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a more specific handler (set with the <a href="struct.ErrorHandlers.html#method.handler" title="method actix_web::middleware::ErrorHandlers::handler"><code>handler()</code></a> method). See examples
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below.</p>
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<p>To register a default for only client errors (400-499) or only server errors (500-599), use the
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<a href="struct.ErrorHandlers.html#method.default_handler_client" title="method actix_web::middleware::ErrorHandlers::default_handler_client"><code>ErrorHandlers::default_handler_client()</code></a> and <a href="struct.ErrorHandlers.html#method.default_handler_server" title="method actix_web::middleware::ErrorHandlers::default_handler_server"><code>ErrorHandlers::default_handler_server()</code></a>
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methods, respectively.</p>
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<p>Any response with a status code that isn’t covered by a specific handler or a default handler
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will pass by unchanged by this middleware.</p>
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<h2 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h2>
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<p>Adding a header:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>actix_web::{
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dev::ServiceResponse,
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http::{header, StatusCode},
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middleware::{ErrorHandlerResponse, ErrorHandlers},
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web, App, HttpResponse, <span class="prelude-ty">Result</span>,
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};
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<span class="kw">fn </span>add_error_header<B>(<span class="kw-2">mut </span>res: ServiceResponse<B>) -> <span class="prelude-ty">Result</span><ErrorHandlerResponse<B>> {
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res.response_mut().headers_mut().insert(
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header::CONTENT_TYPE,
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header::HeaderValue::from_static(<span class="string">"Error"</span>),
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);
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<span class="comment">// body is unchanged, map to "left" slot
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</span><span class="prelude-val">Ok</span>(ErrorHandlerResponse::Response(res.map_into_left_body()))
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}
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<span class="kw">let </span>app = App::new()
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.wrap(ErrorHandlers::new().handler(StatusCode::INTERNAL_SERVER_ERROR, add_error_header))
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.service(web::resource(<span class="string">"/"</span>).route(web::get().to(HttpResponse::InternalServerError)));</code></pre></div>
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<p>Modifying response body:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>actix_web::{
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dev::ServiceResponse,
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http::{header, StatusCode},
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middleware::{ErrorHandlerResponse, ErrorHandlers},
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web, App, HttpResponse, <span class="prelude-ty">Result</span>,
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};
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<span class="kw">fn </span>add_error_body<B>(res: ServiceResponse<B>) -> <span class="prelude-ty">Result</span><ErrorHandlerResponse<B>> {
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<span class="comment">// split service response into request and response components
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</span><span class="kw">let </span>(req, res) = res.into_parts();
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<span class="comment">// set body of response to modified body
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</span><span class="kw">let </span>res = res.set_body(<span class="string">"An error occurred."</span>);
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<span class="comment">// modified bodies need to be boxed and placed in the "right" slot
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</span><span class="kw">let </span>res = ServiceResponse::new(req, res)
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.map_into_boxed_body()
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.map_into_right_body();
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<span class="prelude-val">Ok</span>(ErrorHandlerResponse::Response(res))
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}
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<span class="kw">let </span>app = App::new()
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.wrap(ErrorHandlers::new().handler(StatusCode::INTERNAL_SERVER_ERROR, add_error_body))
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.service(web::resource(<span class="string">"/"</span>).route(web::get().to(HttpResponse::InternalServerError)));</code></pre></div>
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<p>Registering default handler:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">fn </span>add_error_header<B>(<span class="kw-2">mut </span>res: ServiceResponse<B>) -> <span class="prelude-ty">Result</span><ErrorHandlerResponse<B>> {
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res.response_mut().headers_mut().insert(
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header::CONTENT_TYPE,
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header::HeaderValue::from_static(<span class="string">"Error"</span>),
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);
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<span class="comment">// body is unchanged, map to "left" slot
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</span><span class="prelude-val">Ok</span>(ErrorHandlerResponse::Response(res.map_into_left_body()))
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}
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<span class="kw">fn </span>handle_bad_request<B>(<span class="kw-2">mut </span>res: ServiceResponse<B>) -> <span class="prelude-ty">Result</span><ErrorHandlerResponse<B>> {
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res.response_mut().headers_mut().insert(
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header::CONTENT_TYPE,
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header::HeaderValue::from_static(<span class="string">"Bad Request Error"</span>),
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);
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<span class="comment">// body is unchanged, map to "left" slot
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</span><span class="prelude-val">Ok</span>(ErrorHandlerResponse::Response(res.map_into_left_body()))
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}
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<span class="comment">// Bad Request errors will hit `handle_bad_request()`, while all other errors will hit
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// `add_error_header()`. The order in which the methods are called is not meaningful.
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</span><span class="kw">let </span>app = App::new()
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.wrap(
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ErrorHandlers::new()
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.default_handler(add_error_header)
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.handler(StatusCode::BAD_REQUEST, handle_bad_request)
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)
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.service(web::resource(<span class="string">"/"</span>).route(web::get().to(HttpResponse::InternalServerError)));</code></pre></div>
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<p>You can set default handlers for all client (4xx) or all server (5xx) errors:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="comment">// Bad request errors will hit `handle_bad_request()`, other client errors will hit
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// `add_error_header()`, and server errors will pass through unchanged
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</span><span class="kw">let </span>app = App::new()
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.wrap(
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ErrorHandlers::new()
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.default_handler_client(add_error_header) <span class="comment">// or .default_handler_server
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</span>.handler(StatusCode::BAD_REQUEST, handle_bad_request)
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)
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.service(web::resource(<span class="string">"/"</span>).route(web::get().to(HttpResponse::InternalServerError)));</code></pre></div>
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</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-ErrorHandlers%3CB%3E" class="impl"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#200-276">source</a><a href="#impl-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#202-204">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>() -> Self</h4></section></summary><div class="docblock"><p>Construct new <code>ErrorHandlers</code> instance.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.handler" class="method"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#207-215">source</a><h4 class="code-header">pub fn <a href="#method.handler" class="fn">handler</a><F>(self, status: <a class="struct" href="../http/struct.StatusCode.html" title="struct actix_web::http::StatusCode">StatusCode</a>, handler: F) -> Self<div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(<a class="struct" href="../dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a><B>) -> <a class="type" href="../type.Result.html" title="type actix_web::Result">Result</a><<a class="enum" href="enum.ErrorHandlerResponse.html" title="enum actix_web::middleware::ErrorHandlerResponse">ErrorHandlerResponse</a><B>> + 'static,</div></h4></section></summary><div class="docblock"><p>Register error handler for specified status code.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.default_handler" class="method"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#226-236">source</a><h4 class="code-header">pub fn <a href="#method.default_handler" class="fn">default_handler</a><F>(self, handler: F) -> Self<div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(<a class="struct" href="../dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a><B>) -> <a class="type" href="../type.Result.html" title="type actix_web::Result">Result</a><<a class="enum" href="enum.ErrorHandlerResponse.html" title="enum actix_web::middleware::ErrorHandlerResponse">ErrorHandlerResponse</a><B>> + 'static,</div></h4></section></summary><div class="docblock"><p>Register a default error handler.</p>
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<p>Any request with a status code that hasn’t been given a specific other handler (by calling
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<a href="struct.ErrorHandlers.html#method.handler" title="method actix_web::middleware::ErrorHandlers::handler"><code>.handler()</code></a>) will fall back on this.</p>
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<p>Note that this will overwrite any default handlers previously set by calling
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<a href="struct.ErrorHandlers.html#method.default_handler_client" title="method actix_web::middleware::ErrorHandlers::default_handler_client"><code>.default_handler_client()</code></a> or
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<a href="struct.ErrorHandlers.html#method.default_handler_server" title="method actix_web::middleware::ErrorHandlers::default_handler_server"><code>.default_handler_server()</code></a>, but not any set by
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calling <a href="struct.ErrorHandlers.html#method.handler" title="method actix_web::middleware::ErrorHandlers::handler"><code>.handler()</code></a>.</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.default_handler_client" class="method"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#239-247">source</a><h4 class="code-header">pub fn <a href="#method.default_handler_client" class="fn">default_handler_client</a><F>(self, handler: F) -> Self<div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(<a class="struct" href="../dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a><B>) -> <a class="type" href="../type.Result.html" title="type actix_web::Result">Result</a><<a class="enum" href="enum.ErrorHandlerResponse.html" title="enum actix_web::middleware::ErrorHandlerResponse">ErrorHandlerResponse</a><B>> + 'static,</div></h4></section></summary><div class="docblock"><p>Register a handler on which to fall back for client error status codes (400-499).</p>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.default_handler_server" class="method"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#250-258">source</a><h4 class="code-header">pub fn <a href="#method.default_handler_server" class="fn">default_handler_server</a><F>(self, handler: F) -> Self<div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(<a class="struct" href="../dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a><B>) -> <a class="type" href="../type.Result.html" title="type actix_web::Result">Result</a><<a class="enum" href="enum.ErrorHandlerResponse.html" title="enum actix_web::middleware::ErrorHandlerResponse">ErrorHandlerResponse</a><B>> + 'static,</div></h4></section></summary><div class="docblock"><p>Register a handler on which to fall back for server error status codes (500-599).</p>
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</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Default-for-ErrorHandlers%3CB%3E" class="impl"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#190-198">source</a><a href="#impl-Default-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.default" class="method trait-impl"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#191-197">source</a><a href="#method.default" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default" class="fn">default</a>() -> Self</h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Transform%3CS,+ServiceRequest%3E-for-ErrorHandlers%3CB%3E" class="impl"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#278-303">source</a><a href="#impl-Transform%3CS,+ServiceRequest%3E-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<S, B> <a class="trait" href="../dev/trait.Transform.html" title="trait actix_web::dev::Transform">Transform</a><S, <a class="struct" href="../dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B><div class="where">where
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S: <a class="trait" href="../dev/trait.Service.html" title="trait actix_web::dev::Service">Service</a><<a class="struct" href="../dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>, Response = <a class="struct" href="../dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a><B>, Error = <a class="struct" href="../error/struct.Error.html" title="struct actix_web::error::Error">Error</a>> + 'static,
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S::<a class="associatedtype" href="../dev/trait.Service.html#associatedtype.Future" title="type actix_web::dev::Service::Future">Future</a>: 'static,
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B: 'static,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Response" class="associatedtype trait-impl"><a href="#associatedtype.Response" class="anchor">§</a><h4 class="code-header">type <a href="../dev/trait.Transform.html#associatedtype.Response" class="associatedtype">Response</a> = <a class="struct" href="../dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a><<a class="enum" href="../body/enum.EitherBody.html" title="enum actix_web::body::EitherBody">EitherBody</a><B>></h4></section></summary><div class='docblock'>Responses produced by the service.</div></details><details class="toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl"><a href="#associatedtype.Error" class="anchor">§</a><h4 class="code-header">type <a href="../dev/trait.Transform.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="struct" href="../error/struct.Error.html" title="struct actix_web::error::Error">Error</a></h4></section></summary><div class='docblock'>Errors produced by the service.</div></details><details class="toggle" open><summary><section id="associatedtype.Transform" class="associatedtype trait-impl"><a href="#associatedtype.Transform" class="anchor">§</a><h4 class="code-header">type <a href="../dev/trait.Transform.html#associatedtype.Transform" class="associatedtype">Transform</a> = ErrorHandlersMiddleware<S, B></h4></section></summary><div class='docblock'>The <code>TransformService</code> value created by this factory</div></details><details class="toggle" open><summary><section id="associatedtype.InitError" class="associatedtype trait-impl"><a href="#associatedtype.InitError" class="anchor">§</a><h4 class="code-header">type <a href="../dev/trait.Transform.html#associatedtype.InitError" class="associatedtype">InitError</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a></h4></section></summary><div class='docblock'>Errors produced while building a transform service.</div></details><details class="toggle" open><summary><section id="associatedtype.Future" class="associatedtype trait-impl"><a href="#associatedtype.Future" class="anchor">§</a><h4 class="code-header">type <a href="../dev/trait.Transform.html#associatedtype.Future" class="associatedtype">Future</a> = <a class="struct" href="https://doc.rust-lang.org/nightly/core/pin/struct.Pin.html" title="struct core::pin::Pin">Pin</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="https://doc.rust-lang.org/nightly/core/future/future/trait.Future.html" title="trait core::future::future::Future">Future</a><Output = <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<<a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B> as <a class="trait" href="../dev/trait.Transform.html" title="trait actix_web::dev::Transform">Transform</a><S, <a class="struct" href="../dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>>>::<a class="associatedtype" href="../dev/trait.Transform.html#associatedtype.Transform" title="type actix_web::dev::Transform::Transform">Transform</a>, <<a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B> as <a class="trait" href="../dev/trait.Transform.html" title="trait actix_web::dev::Transform">Transform</a><S, <a class="struct" href="../dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>>>::<a class="associatedtype" href="../dev/trait.Transform.html#associatedtype.InitError" title="type actix_web::dev::Transform::InitError">InitError</a>>>>></h4></section></summary><div class='docblock'>The future response value.</div></details><details class="toggle method-toggle" open><summary><section id="method.new_transform" class="method trait-impl"><a class="src rightside" href="../../src/actix_web/middleware/err_handlers.rs.html#290-302">source</a><a href="#method.new_transform" class="anchor">§</a><h4 class="code-header">fn <a href="../dev/trait.Transform.html#tymethod.new_transform" class="fn">new_transform</a>(&self, service: S) -> Self::<a class="associatedtype" href="../dev/trait.Transform.html#associatedtype.Future" title="type actix_web::dev::Transform::Future">Future</a></h4></section></summary><div class='docblock'>Creates and returns a new Transform component, asynchronously</div></details></div></details></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-Freeze-for-ErrorHandlers%3CB%3E" class="impl"><a href="#impl-Freeze-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Freeze.html" title="trait core::marker::Freeze">Freeze</a> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section><section id="impl-RefUnwindSafe-for-ErrorHandlers%3CB%3E" class="impl"><a href="#impl-RefUnwindSafe-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section><section id="impl-Send-for-ErrorHandlers%3CB%3E" class="impl"><a href="#impl-Send-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section><section id="impl-Sync-for-ErrorHandlers%3CB%3E" class="impl"><a href="#impl-Sync-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section><section id="impl-Unpin-for-ErrorHandlers%3CB%3E" class="impl"><a href="#impl-Unpin-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section><section id="impl-UnwindSafe-for-ErrorHandlers%3CB%3E" class="impl"><a href="#impl-UnwindSafe-for-ErrorHandlers%3CB%3E" class="anchor">§</a><h3 class="code-header">impl<B> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.ErrorHandlers.html" title="struct actix_web::middleware::ErrorHandlers">ErrorHandlers</a><B></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
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T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#210">source</a><a href="#method.borrow" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fn">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&T</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#216">source</a><a href="#impl-BorrowMut%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<div class="where">where
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T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#217">source</a><a href="#method.borrow_mut" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fn">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut T</a></h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#765">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#768">source</a><a href="#method.from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fn">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Instrument-for-T" class="impl"><a href="#impl-Instrument-for-T" class="anchor">§</a><h3 class="code-header">impl<T> Instrument for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.instrument" class="method trait-impl"><a href="#method.instrument" class="anchor">§</a><h4 class="code-header">fn <a class="fn">instrument</a>(self, span: Span) -> Instrumented<Self></h4></section></summary><div class='docblock'>Instruments this type with the provided [<code>Span</code>], returning an
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<code>Instrumented</code> wrapper. <a>Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.in_current_span" class="method trait-impl"><a href="#method.in_current_span" class="anchor">§</a><h4 class="code-header">fn <a class="fn">in_current_span</a>(self) -> Instrumented<Self></h4></section></summary><div class='docblock'>Instruments this type with the <a href="super::Span::current()">current</a> <a href="crate::Span"><code>Span</code></a>, returning an
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<code>Instrumented</code> wrapper. <a>Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#748-750">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#758">source</a><a href="#method.into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" class="fn">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p>
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<p>That is, this conversion is whatever the implementation of
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<code><a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for U</code> chooses to do.</p>
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</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Same-for-T" class="impl"><a class="src rightside" href="https://docs.rs/typenum/1.17.0/src/typenum/type_operators.rs.html#34">source</a><a href="#impl-Same-for-T" class="anchor">§</a><h3 class="code-header">impl<T> <a class="trait" href="https://docs.rs/typenum/1.17.0/typenum/type_operators/trait.Same.html" title="trait typenum::type_operators::Same">Same</a> for T</h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Output" class="associatedtype trait-impl"><a href="#associatedtype.Output" class="anchor">§</a><h4 class="code-header">type <a href="https://docs.rs/typenum/1.17.0/typenum/type_operators/trait.Same.html#associatedtype.Output" class="associatedtype">Output</a> = T</h4></section></summary><div class='docblock'>Should always be <code>Self</code></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#805-807">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-2" class="associatedtype trait-impl"><a href="#associatedtype.Error-2" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#812">source</a><a href="#method.try_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fn">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="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><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#790-792">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<div class="where">where
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U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</div></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl"><a href="#associatedtype.Error-1" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="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><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#797">source</a><a href="#method.try_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fn">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="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><div class='docblock'>Performs the conversion.</div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-VZip%3CV%3E-for-T" class="impl"><a href="#impl-VZip%3CV%3E-for-T" class="anchor">§</a><h3 class="code-header">impl<V, T> VZip<V> for T<div class="where">where
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V: MultiLane<T>,</div></h3></section></summary><div class="impl-items"><section id="method.vzip" class="method trait-impl"><a href="#method.vzip" class="anchor">§</a><h4 class="code-header">fn <a class="fn">vzip</a>(self) -> V</h4></section></div></details><details class="toggle implementors-toggle"><summary><section id="impl-WithSubscriber-for-T" class="impl"><a href="#impl-WithSubscriber-for-T" class="anchor">§</a><h3 class="code-header">impl<T> WithSubscriber for T</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.with_subscriber" class="method trait-impl"><a href="#method.with_subscriber" class="anchor">§</a><h4 class="code-header">fn <a class="fn">with_subscriber</a><S>(self, subscriber: S) -> WithDispatch<Self><div class="where">where
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S: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><Dispatch>,</div></h4></section></summary><div class='docblock'>Attaches the provided <a href="super::Subscriber"><code>Subscriber</code></a> to this type, returning a
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[<code>WithDispatch</code>] wrapper. <a>Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.with_current_subscriber" class="method trait-impl"><a href="#method.with_current_subscriber" class="anchor">§</a><h4 class="code-header">fn <a class="fn">with_current_subscriber</a>(self) -> WithDispatch<Self></h4></section></summary><div class='docblock'>Attaches the current <a href="crate::dispatcher#setting-the-default-subscriber">default</a> <a href="super::Subscriber"><code>Subscriber</code></a> to this type, returning a
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[<code>WithDispatch</code>] wrapper. <a>Read more</a></div></details></div></details></div></section></div></main></body></html> |