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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="Source of the Rust file `actix-session/src/storage/cookie.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>cookie.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script src="../../../crates.js"></script><script defer src="../../../main.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script>
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</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">std::convert::TryInto</span>;
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<span class="kw">use</span> <span class="ident">time::Duration</span>;
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<span class="kw">use</span> <span class="ident"><span class="kw">super</span>::SessionKey</span>;
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<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::storage</span>::{
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<span class="ident">interface</span>::{<span class="ident">LoadError</span>, <span class="ident">SaveError</span>, <span class="ident">SessionState</span>, <span class="ident">UpdateError</span>},
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<span class="ident">SessionStore</span>,
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};
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<span class="doccomment">/// Use the session key, stored in the session cookie, as storage backend for the session state.</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// ```no_run</span>
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<span class="doccomment">/// use actix_web::{cookie::Key, web, App, HttpServer, HttpResponse, Error};</span>
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<span class="doccomment">/// use actix_session::{SessionMiddleware, storage::CookieSessionStore};</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// // The secret key would usually be read from a configuration file/environment variables.</span>
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<span class="doccomment">/// fn get_secret_key() -> Key {</span>
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<span class="doccomment">/// # todo!()</span>
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<span class="doccomment">/// // [...]</span>
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<span class="doccomment">/// }</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// #[actix_web::main]</span>
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<span class="doccomment">/// async fn main() -> std::io::Result<()> {</span>
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<span class="doccomment">/// let secret_key = get_secret_key();</span>
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<span class="doccomment">/// HttpServer::new(move ||</span>
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<span class="doccomment">/// App::new()</span>
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<span class="doccomment">/// .wrap(SessionMiddleware::new(CookieSessionStore::default(), secret_key.clone()))</span>
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<span class="doccomment">/// .default_service(web::to(|| HttpResponse::Ok())))</span>
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<span class="doccomment">/// .bind(("127.0.0.1", 8080))?</span>
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<span class="doccomment">/// .run()</span>
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<span class="doccomment">/// .await</span>
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<span class="doccomment">/// }</span>
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<span class="doccomment">/// ```</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// # Limitations</span>
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<span class="doccomment">/// Cookies are subject to size limits - we require session keys to be shorter than 4096 bytes. This</span>
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<span class="doccomment">/// translates into a limit on the maximum size of the session state when using cookies as storage</span>
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<span class="doccomment">/// backend.</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// The session cookie can always be inspected by end users via the developer tools exposed by their</span>
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<span class="doccomment">/// browsers. We strongly recommend setting the policy to [`CookieContentSecurity::Private`] when</span>
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<span class="doccomment">/// using cookies as storage backend.</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// There is no way to invalidate a session before its natural expiry when using cookies as the</span>
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<span class="doccomment">/// storage backend.</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// [`CookieContentSecurity::Private`]: crate::CookieContentSecurity::Private</span>
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<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">docsrs</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"cookie-session"</span>)))]</span>
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Default</span>)]</span>
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<span class="attribute">#[<span class="ident">non_exhaustive</span>]</span>
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CookieSessionStore</span>;
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<span class="attribute">#[<span class="ident">async_trait::async_trait</span>(<span class="question-mark">?</span><span class="ident">Send</span>)]</span>
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<span class="kw">impl</span> <span class="ident">SessionStore</span> <span class="kw">for</span> <span class="ident">CookieSessionStore</span> {
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">load</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">session_key</span>: <span class="kw-2">&</span><span class="ident">SessionKey</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">SessionState</span><span class="op">></span>, <span class="ident">LoadError</span><span class="op">></span> {
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<span class="ident">serde_json::from_str</span>(<span class="ident">session_key</span>.<span class="ident">as_ref</span>())
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.<span class="ident">map</span>(<span class="prelude-val">Some</span>)
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.<span class="ident">map_err</span>(<span class="ident">anyhow::Error::new</span>)
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.<span class="ident">map_err</span>(<span class="ident">LoadError::Deserialization</span>)
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}
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">save</span>(
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<span class="kw-2">&</span><span class="self">self</span>,
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<span class="ident">session_state</span>: <span class="ident">SessionState</span>,
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<span class="ident">_ttl</span>: <span class="kw-2">&</span><span class="ident">Duration</span>,
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) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SessionKey</span>, <span class="ident">SaveError</span><span class="op">></span> {
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<span class="kw">let</span> <span class="ident">session_key</span> <span class="op">=</span> <span class="ident">serde_json::to_string</span>(<span class="kw-2">&</span><span class="ident">session_state</span>)
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.<span class="ident">map_err</span>(<span class="ident">anyhow::Error::new</span>)
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.<span class="ident">map_err</span>(<span class="ident">SaveError::Serialization</span>)<span class="question-mark">?</span>;
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<span class="prelude-val">Ok</span>(<span class="ident">session_key</span>
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.<span class="ident">try_into</span>()
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.<span class="ident">map_err</span>(<span class="ident">Into::into</span>)
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.<span class="ident">map_err</span>(<span class="ident">SaveError::Other</span>)<span class="question-mark">?</span>)
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}
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">update</span>(
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<span class="kw-2">&</span><span class="self">self</span>,
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<span class="ident">_session_key</span>: <span class="ident">SessionKey</span>,
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<span class="ident">session_state</span>: <span class="ident">SessionState</span>,
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<span class="ident">ttl</span>: <span class="kw-2">&</span><span class="ident">Duration</span>,
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) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SessionKey</span>, <span class="ident">UpdateError</span><span class="op">></span> {
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<span class="self">self</span>.<span class="ident">save</span>(<span class="ident">session_state</span>, <span class="ident">ttl</span>)
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.<span class="kw">await</span>
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.<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">err</span><span class="op">|</span> <span class="kw">match</span> <span class="ident">err</span> {
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<span class="ident">SaveError::Serialization</span>(<span class="ident">err</span>) => <span class="ident">UpdateError::Serialization</span>(<span class="ident">err</span>),
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<span class="ident">SaveError::Other</span>(<span class="ident">err</span>) => <span class="ident">UpdateError::Other</span>(<span class="ident">err</span>),
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})
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}
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">delete</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_session_key</span>: <span class="kw-2">&</span><span class="ident">SessionKey</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">anyhow::Error</span><span class="op">></span> {
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<span class="prelude-val">Ok</span>(())
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}
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}
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<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
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<span class="kw">mod</span> <span class="ident">tests</span> {
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<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
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<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">storage::utils::generate_session_key</span>, <span class="ident">test_helpers::acceptance_test_suite</span>};
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<span class="attribute">#[<span class="ident">actix_web::test</span>]</span>
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<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">test_session_workflow</span>() {
|
|||
|
|
<span class="ident">acceptance_test_suite</span>(<span class="ident">CookieSessionStore::default</span>, <span class="bool-val">false</span>).<span class="kw">await</span>;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
<span class="attribute">#[<span class="ident">actix_web::test</span>]</span>
|
|||
|
|
<span class="kw">async</span> <span class="kw">fn</span> <span class="ident">loading_a_random_session_key_returns_deserialization_error</span>() {
|
|||
|
|
<span class="kw">let</span> <span class="ident">store</span> <span class="op">=</span> <span class="ident">CookieSessionStore::default</span>();
|
|||
|
|
<span class="kw">let</span> <span class="ident">session_key</span> <span class="op">=</span> <span class="ident">generate_session_key</span>();
|
|||
|
|
<span class="macro">assert!</span>(<span class="macro">matches!</span>(
|
|||
|
|
<span class="ident">store</span>.<span class="ident">load</span>(<span class="kw-2">&</span><span class="ident">session_key</span>).<span class="kw">await</span>.<span class="ident">unwrap_err</span>(),
|
|||
|
|
<span class="ident">LoadError::Deserialization</span>(<span class="kw">_</span>),
|
|||
|
|
));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
</code></pre></div>
|
|||
|
|
</section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="actix_session" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.61.0-nightly (9fcbc3205 2022-03-04)" ></div>
|
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|
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