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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="A middleware for session management in Actix Web applications."><title>SessionMiddleware in actix_session - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-9ee3a5e31a2afa3e.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="actix_session" data-themes="" data-resource-suffix="" data-rustdoc-version="1.75.0-nightly (a2f5f9691 2023-11-02)" data-channel="nightly" data-search-js="search-8fbf244ebcf71464.js" data-settings-js="settings-74424d7eec62a23e.js" ><script src="../static.files/storage-fec3eaa3851e447d.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-9dd44ab47b99a0fb.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-5d8b3c7633ad77ba.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">&#9776;</button><a class="logo-container" href="../actix_session/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_session/index.html"><img src="https://actix.rs/img/logo.png" alt="logo"></a><h2><a href="../actix_session/index.html">actix_session</a><span class="version">0.8.0</span></h2></div><h2 class="location"><a href="#">SessionMiddleware</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.builder">builder</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-Clone-for-SessionMiddleware%3CStore%3E">Clone</a></li><li><a href="#impl-Transform%3CS,+ServiceRequest%3E-for-SessionMiddleware%3CStore%3E">Transform&lt;S, ServiceRequest&gt;</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Send-for-SessionMiddleware%3CStore%3E">!Send</a></li><li><a href="#impl-Sync-for-SessionMiddleware%3CStore%3E">!Sync</a></li><li><a href="#impl-RefUnwindSafe-for-SessionMiddleware%3CStore%3E">RefUnwindSafe</a></li><li><a href="#impl-Unpin-for-SessionMiddleware%3CStore%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-SessionMiddleware%3CStore%3E">UnwindSafe</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&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3CT%3E-for-T">From&lt;T&gt;</a></li><li><a href="#impl-Instrument-for-T">Instrument</a></li><li><a href="#impl-Into%3CU%3E-for-T">Into&lt;U&gt;</a></
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<p><a href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware"><code>SessionMiddleware</code></a> takes care of a few jobs:</p>
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<ul>
<li>Instructs the session storage backend to create/update/delete/retrieve the state attached to
a session according to its status and the operations that have been performed against it;</li>
<li>Set/remove a cookie, on the client side, to enable a user to be consistently associated with
the same session across multiple HTTP requests.</li>
</ul>
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<p>Use <a href="struct.SessionMiddleware.html#method.new" title="associated function actix_session::SessionMiddleware::new"><code>SessionMiddleware::new</code></a> to initialize the session framework using the default parameters.
To create a new instance of <a href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware"><code>SessionMiddleware</code></a> you need to provide:</p>
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<ul>
<li>an instance of the session storage backend you wish to use (i.e. an implementation of
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<a href="storage/trait.SessionStore.html" title="trait actix_session::storage::SessionStore"><code>SessionStore</code></a>);</li>
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<li>a secret key, to sign or encrypt the content of client-side session cookie.</li>
</ul>
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<h2 id="how-did-we-choose-defaults"><a href="#how-did-we-choose-defaults">How did we choose defaults?</a></h2>
<p>You should not regret adding <code>actix-session</code> to your dependencies and going to production using
the default configuration. That is why, when in doubt, we opt to use the most secure option for
each configuration parameter.</p>
<p>We expose knobs to change the default to suit your needs—i.e., if you know what you are doing,
we will not stop you. But being a subject-matter expert should not be a requirement to deploy
reasonably secure implementation of sessions.</p>
<h2 id="examples"><a href="#examples">Examples</a></h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>actix_web::{web, App, HttpServer, HttpResponse, Error};
<span class="kw">use </span>actix_session::{Session, SessionMiddleware, storage::RedisActorSessionStore};
<span class="kw">use </span>actix_web::cookie::Key;
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<span class="comment">// The secret key would usually be read from a configuration file/environment variables.
</span><span class="kw">fn </span>get_secret_key() -&gt; Key {
<span class="comment">// [...]
</span>}
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<span class="attr">#[actix_web::main]
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</span><span class="kw">async fn </span>main() -&gt; std::io::Result&lt;()&gt; {
<span class="kw">let </span>secret_key = get_secret_key();
<span class="kw">let </span>redis_connection_string = <span class="string">&quot;127.0.0.1:6379&quot;</span>;
HttpServer::new(<span class="kw">move </span>||
App::new()
<span class="comment">// Add session management to your application using Redis for session state storage
</span>.wrap(
SessionMiddleware::new(
RedisActorSessionStore::new(redis_connection_string),
secret_key.clone()
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)
)
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.default_service(web::to(|| HttpResponse::Ok())))
.bind((<span class="string">&quot;127.0.0.1&quot;</span>, <span class="number">8080</span>))<span class="question-mark">?
</span>.run()
.<span class="kw">await
</span>}</code></pre></div>
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<p>If you want to customise use <a href="struct.SessionMiddleware.html#method.builder" title="associated function actix_session::SessionMiddleware::builder"><code>builder</code></a> instead of <a href="struct.SessionMiddleware.html#method.new" title="associated function actix_session::SessionMiddleware::new"><code>new</code></a>:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>actix_web::{App, cookie::{Key, time}, Error, HttpResponse, HttpServer, web};
<span class="kw">use </span>actix_session::{Session, SessionMiddleware, storage::RedisActorSessionStore};
<span class="kw">use </span>actix_session::config::PersistentSession;
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<span class="comment">// The secret key would usually be read from a configuration file/environment variables.
</span><span class="kw">fn </span>get_secret_key() -&gt; Key {
<span class="comment">// [...]
</span>}
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<span class="attr">#[actix_web::main]
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</span><span class="kw">async fn </span>main() -&gt; std::io::Result&lt;()&gt; {
<span class="kw">let </span>secret_key = get_secret_key();
<span class="kw">let </span>redis_connection_string = <span class="string">&quot;127.0.0.1:6379&quot;</span>;
HttpServer::new(<span class="kw">move </span>||
App::new()
<span class="comment">// Customise session length!
</span>.wrap(
SessionMiddleware::builder(
RedisActorSessionStore::new(redis_connection_string),
secret_key.clone()
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)
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.session_lifecycle(
PersistentSession::default()
.session_ttl(time::Duration::days(<span class="number">5</span>))
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)
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.build(),
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)
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.default_service(web::to(|| HttpResponse::Ok())))
.bind((<span class="string">&quot;127.0.0.1&quot;</span>, <span class="number">8080</span>))<span class="question-mark">?
</span>.run()
.<span class="kw">await
</span>}</code></pre></div>
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</div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-SessionMiddleware%3CStore%3E" class="impl"><a class="src rightside" href="../src/actix_session/middleware.rs.html#122-150">source</a><a href="#impl-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;Store: <a class="trait" href="storage/trait.SessionStore.html" title="trait actix_session::storage::SessionStore">SessionStore</a>&gt; <a class="struct" href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;</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_session/middleware.rs.html#130-132">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>(store: Store, key: <a class="struct" href="https://docs.rs/cookie/0.16/cookie/secure/key/struct.Key.html" title="struct cookie::secure::key::Key">Key</a>) -&gt; Self</h4></section></summary><div class="docblock"><p>Use <a href="struct.SessionMiddleware.html#method.new" title="associated function actix_session::SessionMiddleware::new"><code>SessionMiddleware::new</code></a> to initialize the session framework using the default
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parameters.</p>
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<p>To create a new instance of <a href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware"><code>SessionMiddleware</code></a> you need to provide:</p>
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<ul>
<li>an instance of the session storage backend you wish to use (i.e. an implementation of
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<a href="storage/trait.SessionStore.html" title="trait actix_session::storage::SessionStore"><code>SessionStore</code></a>);</li>
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<li>a secret key, to sign or encrypt the content of client-side session cookie.</li>
</ul>
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</div></details><details class="toggle method-toggle" open><summary><section id="method.builder" class="method"><a class="src rightside" href="../src/actix_session/middleware.rs.html#140-142">source</a><h4 class="code-header">pub fn <a href="#method.builder" class="fn">builder</a>(store: Store, key: <a class="struct" href="https://docs.rs/cookie/0.16/cookie/secure/key/struct.Key.html" title="struct cookie::secure::key::Key">Key</a>) -&gt; <a class="struct" href="config/struct.SessionMiddlewareBuilder.html" title="struct actix_session::config::SessionMiddlewareBuilder">SessionMiddlewareBuilder</a>&lt;Store&gt;</h4></section></summary><div class="docblock"><p>A fluent API to configure <a href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware"><code>SessionMiddleware</code></a>.</p>
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<p>It takes as input the two required inputs to create a new instance of <a href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware"><code>SessionMiddleware</code></a>:</p>
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<ul>
<li>an instance of the session storage backend you wish to use (i.e. an implementation of
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<a href="storage/trait.SessionStore.html" title="trait actix_session::storage::SessionStore"><code>SessionStore</code></a>);</li>
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<li>a secret key, to sign or encrypt the content of client-side session cookie.</li>
</ul>
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</div></details></div></details></div><h2 id="trait-implementations" class="small-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-Clone-for-SessionMiddleware%3CStore%3E" class="impl"><a class="src rightside" href="../src/actix_session/middleware.rs.html#116">source</a><a href="#impl-Clone-for-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;Store: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> + <a class="trait" href="storage/trait.SessionStore.html" title="trait actix_session::storage::SessionStore">SessionStore</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;</h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl"><a class="src rightside" href="../src/actix_session/middleware.rs.html#116">source</a><a href="#method.clone" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone" class="fn">clone</a>(&amp;self) -&gt; <a class="struct" href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;</h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="src" href="https://doc.rust-lang.org/nightly/src/core/clone.rs.html#169">source</a></span><a href="#method.clone_from" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from" class="fn">clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;Self</a>)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="toggle implementors-toggle" open><summary><section id="impl-Transform%3CS,+ServiceRequest%3E-for-SessionMiddleware%3CStore%3E" class="impl"><a class="src rightside" href="../src/actix_session/middleware.rs.html#152-172">source</a><a href="#impl-Transform%3CS,+ServiceRequest%3E-for-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;S, B, Store&gt; Transform&lt;S, ServiceRequest&gt; for <a class="struct" href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;<span class="where fmt-newline">where
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S: Service&lt;ServiceRequest, Response = ServiceResponse&lt;B&gt;, Error = Error&gt; + 'static,
S::Future: 'static,
B: MessageBody + 'static,
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Store: <a class="trait" href="storage/trait.SessionStore.html" title="trait actix_session::storage::SessionStore">SessionStore</a> + 'static,</span></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 class="associatedtype">Response</a> = ServiceResponse&lt;B&gt;</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 class="associatedtype">Error</a> = Error</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 class="associatedtype">Transform</a> = InnerSessionMiddleware&lt;S, Store&gt;</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 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 class="associatedtype">Future</a> = Ready&lt;<a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;&lt;<a class="struct" href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt; as Transform&lt;S, ServiceRequest&gt;&gt;::Transform, &lt;<a class="struct" href="struct.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt; as Transform&lt;S, ServiceRequest&gt;&gt;::InitError&gt;&gt;</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_session/middleware.rs.html#165-171">source</a><a href="#method.new_transform" class="anchor">§</a><h4 class="code-header">fn <a class="fn">new_transform</a>(&amp;self, service: S) -&gt; Self::Future</h4></section></summary><div class='docblock'>Creates and returns a new Transform component, asynchronously</div></details></div></details></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-SessionMiddleware%3CStore%3E" class="impl"><a href="#impl-RefUnwindSafe-for-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;Store&gt; <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.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;<span class="where fmt-newline">where
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Store: <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>,</span></h3></section><section id="impl-Send-for-SessionMiddleware%3CStore%3E" class="impl"><a href="#impl-Send-for-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;Store&gt; !<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.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;</h3></section><section id="impl-Sync-for-SessionMiddleware%3CStore%3E" class="impl"><a href="#impl-Sync-for-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;Store&gt; !<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.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;</h3></section><section id="impl-Unpin-for-SessionMiddleware%3CStore%3E" class="impl"><a href="#impl-Unpin-for-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;Store&gt; <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.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;</h3></section><section id="impl-UnwindSafe-for-SessionMiddleware%3CStore%3E" class="impl"><a href="#impl-UnwindSafe-for-SessionMiddleware%3CStore%3E" class="anchor">§</a><h3 class="code-header">impl&lt;Store&gt; <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.SessionMiddleware.html" title="struct actix_session::SessionMiddleware">SessionMiddleware</a>&lt;Store&gt;<span class="where fmt-newline">where
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Store: <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>,</span></h3></section></div><h2 id="blanket-implementations" class="small-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#135">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<span class="where fmt-newline">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></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#136">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>(&amp;self) -&gt; <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&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<span class="where fmt-newline">where
T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></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>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;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&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T<span class="where fmt-newline">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>,</span></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>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;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#763">source</a><a href="#impl-From%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; 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#766">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) -&gt; T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p>
</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&lt;T&gt; 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) -&gt; Instrumented&lt;Self&gt;</h4></section></summary><div class='docblock'>Instruments this type with the provided [<code>Span</code>], returning an
<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) -&gt; Instrumented&lt;Self&gt;</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
<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#747-749">source</a><a href="#impl-Into%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T<span class="where fmt-newline">where
U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,</span></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#756">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) -&gt; 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>&lt;T&gt; 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&lt;T&gt; <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-ToOwned-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#83-85">source</a><a href="#impl-ToOwned-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<span class="where fmt-newline">where
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T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</span></h3></section></summary><div class="impl-items"><details class="toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl"><a href="#associatedtype.Owned" class="anchor">§</a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#88">source</a><a href="#method.to_owned" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fn">to_owned</a>(&amp;self) -&gt; T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#92">source</a><a href="#method.clone_into" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fn">clone_into</a>(&amp;self, target: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut T</a>)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></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#803-805">source</a><a href="#impl-TryFrom%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T<span class="where fmt-newline">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>&lt;T&gt;,</span></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#810">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) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<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>&gt;</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#788-790">source</a><a href="#impl-TryInto%3CU%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T<span class="where fmt-newline">where
U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,</span></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> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<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#795">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) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<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>&gt;</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&lt;V, T&gt; VZip&lt;V&gt; for T<span class="where fmt-newline">where
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V: MultiLane&lt;T&gt;,</span></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) -&gt; 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&lt;T&gt; 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>&lt;S&gt;(self, subscriber: S) -&gt; WithDispatch&lt;Self&gt;<span class="where fmt-newline">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>&lt;Dispatch&gt;,</span></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) -&gt; WithDispatch&lt;Self&gt;</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
[<code>WithDispatch</code>] wrapper. <a>Read more</a></div></details></div></details></div></section></div></main></body></html>
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