<!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-web-httpauth/src/headers/www_authenticate/challenge/basic.rs`."><title>basic.rs - source</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/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../../../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../../../../static.files/rustdoc-bf502f66ec635d5d.css"><meta name="rustdoc-vars" data-root-path="../../../../../" data-static-root-path="../../../../../static.files/" data-current-crate="actix_web_httpauth" data-themes="" data-resource-suffix="" data-rustdoc-version="1.77.0-nightly (e51e98dde 2023-12-31)" data-channel="nightly" data-search-js="search-c17e98913a53b3b7.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../../../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="../../../../../static.files/src-script-e66d777a5a92e9b2.js"></script><script defer src="../../../../../src-files.js"></script><script defer src="../../../../../static.files/main-0b2e2def73e61cbe.js"></script><noscript><link rel="stylesheet" href="../../../../../static.files/noscript-04d5337699b92874.css"></noscript><link rel="icon" href="https://actix.rs/favicon.ico"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title">
            <h2>Files</h2></div></nav><div class="sidebar-resizer"></div>
    <main><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../../../../actix_web_httpauth/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../../../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers"><a href="#1" id="1">1</a>
<a href="#2" id="2">2</a>
<a href="#3" id="3">3</a>
<a href="#4" id="4">4</a>
<a href="#5" id="5">5</a>
<a href="#6" id="6">6</a>
<a href="#7" id="7">7</a>
<a href="#8" id="8">8</a>
<a href="#9" id="9">9</a>
<a href="#10" id="10">10</a>
<a href="#11" id="11">11</a>
<a href="#12" id="12">12</a>
<a href="#13" id="13">13</a>
<a href="#14" id="14">14</a>
<a href="#15" id="15">15</a>
<a href="#16" id="16">16</a>
<a href="#17" id="17">17</a>
<a href="#18" id="18">18</a>
<a href="#19" id="19">19</a>
<a href="#20" id="20">20</a>
<a href="#21" id="21">21</a>
<a href="#22" id="22">22</a>
<a href="#23" id="23">23</a>
<a href="#24" id="24">24</a>
<a href="#25" id="25">25</a>
<a href="#26" id="26">26</a>
<a href="#27" id="27">27</a>
<a href="#28" id="28">28</a>
<a href="#29" id="29">29</a>
<a href="#30" id="30">30</a>
<a href="#31" id="31">31</a>
<a href="#32" id="32">32</a>
<a href="#33" id="33">33</a>
<a href="#34" id="34">34</a>
<a href="#35" id="35">35</a>
<a href="#36" id="36">36</a>
<a href="#37" id="37">37</a>
<a href="#38" id="38">38</a>
<a href="#39" id="39">39</a>
<a href="#40" id="40">40</a>
<a href="#41" id="41">41</a>
<a href="#42" id="42">42</a>
<a href="#43" id="43">43</a>
<a href="#44" id="44">44</a>
<a href="#45" id="45">45</a>
<a href="#46" id="46">46</a>
<a href="#47" id="47">47</a>
<a href="#48" id="48">48</a>
<a href="#49" id="49">49</a>
<a href="#50" id="50">50</a>
<a href="#51" id="51">51</a>
<a href="#52" id="52">52</a>
<a href="#53" id="53">53</a>
<a href="#54" id="54">54</a>
<a href="#55" id="55">55</a>
<a href="#56" id="56">56</a>
<a href="#57" id="57">57</a>
<a href="#58" id="58">58</a>
<a href="#59" id="59">59</a>
<a href="#60" id="60">60</a>
<a href="#61" id="61">61</a>
<a href="#62" id="62">62</a>
<a href="#63" id="63">63</a>
<a href="#64" id="64">64</a>
<a href="#65" id="65">65</a>
<a href="#66" id="66">66</a>
<a href="#67" id="67">67</a>
<a href="#68" id="68">68</a>
<a href="#69" id="69">69</a>
<a href="#70" id="70">70</a>
<a href="#71" id="71">71</a>
<a href="#72" id="72">72</a>
<a href="#73" id="73">73</a>
<a href="#74" id="74">74</a>
<a href="#75" id="75">75</a>
<a href="#76" id="76">76</a>
<a href="#77" id="77">77</a>
<a href="#78" id="78">78</a>
<a href="#79" id="79">79</a>
<a href="#80" id="80">80</a>
<a href="#81" id="81">81</a>
<a href="#82" id="82">82</a>
<a href="#83" id="83">83</a>
<a href="#84" id="84">84</a>
<a href="#85" id="85">85</a>
<a href="#86" id="86">86</a>
<a href="#87" id="87">87</a>
<a href="#88" id="88">88</a>
<a href="#89" id="89">89</a>
<a href="#90" id="90">90</a>
<a href="#91" id="91">91</a>
<a href="#92" id="92">92</a>
<a href="#93" id="93">93</a>
<a href="#94" id="94">94</a>
<a href="#95" id="95">95</a>
<a href="#96" id="96">96</a>
<a href="#97" id="97">97</a>
<a href="#98" id="98">98</a>
<a href="#99" id="99">99</a>
<a href="#100" id="100">100</a>
<a href="#101" id="101">101</a>
<a href="#102" id="102">102</a>
<a href="#103" id="103">103</a>
<a href="#104" id="104">104</a>
<a href="#105" id="105">105</a>
<a href="#106" id="106">106</a>
<a href="#107" id="107">107</a>
<a href="#108" id="108">108</a>
<a href="#109" id="109">109</a>
<a href="#110" id="110">110</a>
<a href="#111" id="111">111</a>
<a href="#112" id="112">112</a>
<a href="#113" id="113">113</a>
<a href="#114" id="114">114</a>
<a href="#115" id="115">115</a>
<a href="#116" id="116">116</a>
<a href="#117" id="117">117</a>
<a href="#118" id="118">118</a>
<a href="#119" id="119">119</a>
<a href="#120" id="120">120</a>
<a href="#121" id="121">121</a>
<a href="#122" id="122">122</a>
<a href="#123" id="123">123</a>
<a href="#124" id="124">124</a>
<a href="#125" id="125">125</a>
<a href="#126" id="126">126</a>
<a href="#127" id="127">127</a>
<a href="#128" id="128">128</a>
<a href="#129" id="129">129</a>
<a href="#130" id="130">130</a>
<a href="#131" id="131">131</a>
<a href="#132" id="132">132</a>
<a href="#133" id="133">133</a>
<a href="#134" id="134">134</a>
<a href="#135" id="135">135</a>
<a href="#136" id="136">136</a>
</pre></div><pre class="rust"><code><span class="doccomment">//! Challenge for the "Basic" HTTP Authentication Scheme.

</span><span class="kw">use </span>std::{borrow::Cow, fmt, str};

<span class="kw">use </span>actix_web::{
    http::header::{HeaderValue, InvalidHeaderValue, TryIntoHeaderValue},
    web::{BufMut, Bytes, BytesMut},
};

<span class="kw">use </span><span class="kw">super</span>::Challenge;
<span class="kw">use </span><span class="kw">crate</span>::utils;

<span class="doccomment">/// Challenge for [`WWW-Authenticate`] header with HTTP Basic auth scheme,
/// described in [RFC 7617](https://tools.ietf.org/html/rfc7617)
///
/// # Examples
/// ```
/// # use actix_web::{web, App, HttpRequest, HttpResponse, HttpServer};
/// use actix_web_httpauth::headers::www_authenticate::basic::Basic;
/// use actix_web_httpauth::headers::www_authenticate::WwwAuthenticate;
///
/// fn index(_req: HttpRequest) -&gt; HttpResponse {
///     let challenge = Basic::with_realm("Restricted area");
///
///     HttpResponse::Unauthorized()
///         .insert_header(WwwAuthenticate(challenge))
///         .finish()
/// }
/// ```
///
/// [`WWW-Authenticate`]: ../struct.WwwAuthenticate.html
</span><span class="attr">#[derive(Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Default, Clone)]
</span><span class="kw">pub struct </span>Basic {
    <span class="comment">// "realm" parameter is optional now: https://tools.ietf.org/html/rfc7235#appendix-A
    </span><span class="kw">pub</span>(<span class="kw">crate</span>) realm: <span class="prelude-ty">Option</span>&lt;Cow&lt;<span class="lifetime">'static</span>, str&gt;&gt;,
}

<span class="kw">impl </span>Basic {
    <span class="doccomment">/// Creates new `Basic` challenge with an empty `realm` field.
    ///
    /// # Examples
    /// ```
    /// # use actix_web_httpauth::headers::www_authenticate::basic::Basic;
    /// let challenge = Basic::new();
    /// ```
    </span><span class="kw">pub fn </span>new() -&gt; Basic {
        Default::default()
    }

    <span class="doccomment">/// Creates new `Basic` challenge from the provided `realm` field value.
    ///
    /// # Examples
    ///
    /// ```
    /// # use actix_web_httpauth::headers::www_authenticate::basic::Basic;
    /// let challenge = Basic::with_realm("Restricted area");
    /// ```
    ///
    /// ```
    /// # use actix_web_httpauth::headers::www_authenticate::basic::Basic;
    /// let my_realm = "Earth realm".to_string();
    /// let challenge = Basic::with_realm(my_realm);
    /// ```
    </span><span class="kw">pub fn </span>with_realm&lt;T&gt;(value: T) -&gt; Basic
    <span class="kw">where
        </span>T: Into&lt;Cow&lt;<span class="lifetime">'static</span>, str&gt;&gt;,
    {
        Basic {
            realm: <span class="prelude-val">Some</span>(value.into()),
        }
    }
}

<span class="attr">#[doc(hidden)]
</span><span class="kw">impl </span>Challenge <span class="kw">for </span>Basic {
    <span class="kw">fn </span>to_bytes(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; Bytes {
        <span class="comment">// 5 is for `"Basic"`, 9 is for `"realm=\"\""`
        </span><span class="kw">let </span>length = <span class="number">5 </span>+ <span class="self">self</span>.realm.as_ref().map_or(<span class="number">0</span>, |realm| realm.len() + <span class="number">9</span>);
        <span class="kw">let </span><span class="kw-2">mut </span>buffer = BytesMut::with_capacity(length);
        buffer.put(<span class="kw-2">&amp;</span><span class="string">b"Basic"</span>[..]);
        <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>realm) = <span class="self">self</span>.realm {
            buffer.put(<span class="kw-2">&amp;</span><span class="string">b" realm=\""</span>[..]);
            utils::put_quoted(<span class="kw-2">&amp;mut </span>buffer, realm);
            buffer.put_u8(<span class="string">b'"'</span>);
        }

        buffer.freeze()
    }
}

<span class="kw">impl </span>fmt::Display <span class="kw">for </span>Basic {
    <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter&lt;<span class="lifetime">'_</span>&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;(), fmt::Error&gt; {
        <span class="kw">let </span>bytes = <span class="self">self</span>.to_bytes();
        <span class="kw">let </span>repr = str::from_utf8(<span class="kw-2">&amp;</span>bytes)
            <span class="comment">// Should not happen since challenges are crafted manually
            // from a `&amp;'static str` or `String`
            </span>.map_err(|<span class="kw">_</span>| fmt::Error)<span class="question-mark">?</span>;

        f.write_str(repr)
    }
}

<span class="kw">impl </span>TryIntoHeaderValue <span class="kw">for </span>Basic {
    <span class="kw">type </span>Error = InvalidHeaderValue;

    <span class="kw">fn </span>try_into_value(<span class="self">self</span>) -&gt; <span class="prelude-ty">Result</span>&lt;HeaderValue, <span class="self">Self</span>::Error&gt; {
        HeaderValue::from_maybe_shared(<span class="self">self</span>.to_bytes())
    }
}

<span class="attr">#[cfg(test)]
</span><span class="kw">mod </span>tests {
    <span class="kw">use super</span>::<span class="kw-2">*</span>;

    <span class="attr">#[test]
    </span><span class="kw">fn </span>test_plain_into_header_value() {
        <span class="kw">let </span>challenge = Basic { realm: <span class="prelude-val">None </span>};

        <span class="kw">let </span>value = challenge.try_into_value();
        <span class="macro">assert!</span>(value.is_ok());
        <span class="kw">let </span>value = value.unwrap();
        <span class="macro">assert_eq!</span>(value, <span class="string">"Basic"</span>);
    }

    <span class="attr">#[test]
    </span><span class="kw">fn </span>test_with_realm_into_header_value() {
        <span class="kw">let </span>challenge = Basic {
            realm: <span class="prelude-val">Some</span>(<span class="string">"Restricted area"</span>.into()),
        };

        <span class="kw">let </span>value = challenge.try_into_value();
        <span class="macro">assert!</span>(value.is_ok());
        <span class="kw">let </span>value = value.unwrap();
        <span class="macro">assert_eq!</span>(value, <span class="string">"Basic realm=\"Restricted area\""</span>);
    }
}
</code></pre></div></section></main></body></html>