<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `DefaultHeaders` struct in crate `actix_web`."><metaname="keywords"content="rust, rustlang, rust-lang, DefaultHeaders"><title>actix_web::middleware::DefaultHeaders - Rust</title><linkrel="stylesheet"type="text/css"href="../../normalize.css"><linkrel="stylesheet"type="text/css"href="../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../../dark.css"><linkrel="stylesheet"type="text/css"href="../../light.css"id="themeStyle"><scriptsrc="../../storage.js"></script></head><bodyclass="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><pclass='location'>Struct DefaultHeaders</p><divclass="sidebar-elems"><divclass="block items"><aclass="sidebar-title"href="#methods">Methods</a><divclass="sidebar-links"><ahref="#method.new">new</a><ahref="#method.header">header</a><ahref="#method.content_type">content_type</a></div><aclass="sidebar-title"href="#implementations">Trait Implementations</a><divclass="sidebar-links"><ahref="#impl-Default">Default</a><ahref="#impl-Middleware%3CS%3E">Middleware<S></a></div><aclass="sidebar-title"href="#synthetic-implementations">Auto Trait Implementations</a><divclass="sidebar-links"><ahref="#impl-Send">Send</a><ahref="#impl-Sync">Sync</a></div></div><pclass='location'><ahref='../index.html'>actix_web</a>::<wbr><ahref='index.html'>middleware</a></p><script>window.sidebarCurrent={name:'DefaultHeaders',ty:'struct',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><inputclass="search-input"name="search"autocomplete="off"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><aid="settings-menu"href="../../settings.html"><imgsrc="../../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='in-band'>Struct <ahref='../index.html'>actix_web</a>::<wbr><ahref='index.html'>middleware</a>::<wbr><aclass="struct"href=''>DefaultHeaders</a></span><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass='inner'>−</span>]</a></span><aclass='srclink'href='../../src/actix_web/middleware/defaultheaders.rs.html#29-32'title='goto source code'>[src]</a></span></h1><divclass="docblock type-decl"><preclass='rust struct'>pub struct DefaultHeaders { /* fields omitted */ }</pre></div><divclass='docblock'><p><code>Middleware</code> for setting default response headers.</p>
<p>This middleware does not set header if response headers already contains it.</p>
</div><h4id='method.content_type'class="method"><spanid='content_type.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.content_type'class='fnname'>content_type</a>(self) -> Self</code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='../../src/actix_web/middleware/defaultheaders.rs.html#70-73'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Set <em>CONTENT-TYPE</em> header if response does not contain this header.</p>
<divid='implementations-list'><h3id='impl-Default'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html"title="trait core::default::Default">Default</a> for <aclass="struct"href="../../actix_web/middleware/struct.DefaultHeaders.html"title="struct actix_web::middleware::DefaultHeaders">DefaultHeaders</a></code><ahref='#impl-Default'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='../../src/actix_web/middleware/defaultheaders.rs.html#34-41'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.default'class="method"><spanid='default.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default'class='fnname'>default</a>() -> Self</code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='../../src/actix_web/middleware/defaultheaders.rs.html#35-40'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns the "default value" for a type. <ahref="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></p>
</div></div><h3id='impl-Middleware%3CS%3E'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<S><aclass="trait"href="../../actix_web/middleware/trait.Middleware.html"title="trait actix_web::middleware::Middleware">Middleware</a><S> for <aclass="struct"href="../../actix_web/middleware/struct.DefaultHeaders.html"title="struct actix_web::middleware::DefaultHeaders">DefaultHeaders</a></code><ahref='#impl-Middleware%3CS%3E'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='../../src/actix_web/middleware/defaultheaders.rs.html#76-92'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.response'class="method"><spanid='response.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='../../actix_web/middleware/trait.Middleware.html#method.response'class='fnname'>response</a>(&self, _: &<aclass="struct"href="../../actix_web/struct.HttpRequest.html"title="struct actix_web::HttpRequest">HttpRequest</a><S>, resp: <aclass="struct"href="../../actix_web/struct.HttpResponse.html"title="struct actix_web::HttpResponse">HttpResponse</a>) -><aclass="type"href="../../actix_web/error/type.Result.html"title="type actix_web::error::Result">Result</a><<aclass="enum"href="../../actix_web/middleware/enum.Response.html"title="enum actix_web::middleware::Response">Response</a>></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='../../src/actix_web/middleware/defaultheaders.rs.html#77-91'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Method is called when handler returns response, but before sending http message to peer. <ahref="../../actix_web/middleware/trait.Middleware.html#method.response">Read more</a></p>
</div><h4id='method.start'class="method"><spanid='start.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='../../actix_web/middleware/trait.Middleware.html#method.start'class='fnname'>start</a>(&self, req: &<aclass="struct"href="../../actix_web/struct.HttpRequest.html"title="struct actix_web::HttpRequest">HttpRequest</a><S>) -><aclass="type"href="../../actix_web/error/type.Result.html"title="type actix_web::error::Result">Result</a><<aclass="enum"href="../../actix_web/middleware/enum.Started.html"title="enum actix_web::middleware::Started">Started</a>></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='../../src/actix_web/middleware/mod.rs.html#54-56'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Method is called when request is ready. It may return future, which should resolve before next middleware get called. <ahref="../../actix_web/middleware/trait.Middleware.html#method.start">Read more</a></p>
</div><h4id='method.finish'class="method"><spanid='finish.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='../../actix_web/middleware/trait.Middleware.html#method.finish'class='fnname'>finish</a>(&self, req: &<aclass="struct"href="../../actix_web/struct.HttpRequest.html"title="struct actix_web::HttpRequest">HttpRequest</a><S>, resp: &<aclass="struct"href="../../actix_web/struct.HttpResponse.html"title="struct actix_web::HttpResponse">HttpResponse</a>) -><aclass="enum"href="../../actix_web/middleware/enum.Finished.html"title="enum actix_web::middleware::Finished">Finished</a></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='../../src/actix_web/middleware/mod.rs.html#65-67'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Method is called after body stream get sent to peer.</p>
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<h3id='impl-Send'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a> for <aclass="struct"href="../../actix_web/middleware/struct.DefaultHeaders.html"title="struct actix_web::middleware::DefaultHeaders">DefaultHeaders</a></code><ahref='#impl-Send'class='anchor'></a></span></td><td><spanclass='out-of-band'></span></td></tr></tbody></table></h3><divclass='impl-items'></div><h3id='impl-Sync'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html"title="trait core::marker::Sync">Sync</a> for <aclass="struct"href="../../actix_web/middleware/struct.DefaultHeaders.html"title="struct actix_web::middleware::DefaultHeaders">DefaultHeaders</a></code><ahref='#impl-Sync'class='anchor'></a></span></td><td><spanclass='out-of-band'></span></td></tr></tbody></table></h3><divclass='impl-items'></div></div></section><sectionid="search"class="content hidden"></section><sectionclass="footer"></section><asideid="help"class="hidden"><div><h1class="hidden">Help</h1><divclass="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><divclass="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath="../../";window.currentCrate="actix_web";</script><scriptsrc="../../aliases.js"></script><scriptsrc="../../main.js"></script><scriptdefersrc="../../search-index.js"></script></body></html>
