<!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 to the Rust file `src/header/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.rs.html -- source</title><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="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust ">
<span class="doccomment">//! Various http headers</span>
<span class="comment">// This is mostly copy of [hyper](https://github.com/hyperium/hyper/tree/master/src/header)</span>
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">str</span>::<span class="ident">FromStr</span>;
<span class="kw">use</span> <span class="ident">bytes</span>::{<span class="ident">Bytes</span>, <span class="ident">BytesMut</span>};
<span class="kw">use</span> <span class="ident">mime</span>::<span class="ident">Mime</span>;
<span class="kw">use</span> <span class="ident">modhttp</span>::<span class="ident">header</span>::<span class="ident">GetAll</span>;
<span class="kw">use</span> <span class="ident">modhttp</span>::<span class="ident">Error</span> <span class="kw">as</span> <span class="ident">HttpError</span>;
<span class="kw">use</span> <span class="ident">percent_encoding</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">modhttp</span>::<span class="ident">header</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">error</span>::<span class="ident">ParseError</span>;
<span class="kw">use</span> <span class="ident">httpmessage</span>::<span class="ident">HttpMessage</span>;
<span class="kw">mod</span> <span class="ident">common</span>;
<span class="kw">mod</span> <span class="ident">shared</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">common</span>::<span class="kw-2">*</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">shared</span>::<span class="kw-2">*</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="doccomment">/// A trait for any object that will represent a header field and value.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Header</span>
<span class="kw">where</span>
<span class="self">Self</span>: <span class="ident">IntoHeaderValue</span>,
{
<span class="doccomment">/// Returns the name of the header field</span>
<span class="kw">fn</span> <span class="ident">name</span>() <span class="op">-></span> <span class="ident">HeaderName</span>;
<span class="doccomment">/// Parse a header</span>
<span class="kw">fn</span> <span class="ident">parse</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">HttpMessage</span><span class="op">></span>(<span class="ident">msg</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident">ParseError</span><span class="op">></span>;
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="doccomment">/// A trait for any object that can be Converted to a `HeaderValue`</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">IntoHeaderValue</span>: <span class="ident">Sized</span> {
<span class="doccomment">/// The type returned in the event of a conversion error.</span>
<span class="kw">type</span> <span class="ident">Error</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">HttpError</span><span class="op">></span>;
<span class="doccomment">/// Try to convert value to a Header value.</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span>;
}
<span class="kw">impl</span> <span class="ident">IntoHeaderValue</span> <span class="kw">for</span> <span class="ident">HeaderValue</span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">InvalidHeaderValue</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="prelude-val">Ok</span>(<span class="self">self</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">IntoHeaderValue</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">str</span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">InvalidHeaderValue</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">parse</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">IntoHeaderValue</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">u8</span>] {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">InvalidHeaderValue</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="ident">HeaderValue</span>::<span class="ident">from_bytes</span>(<span class="self">self</span>)
}
}
<span class="kw">impl</span> <span class="ident">IntoHeaderValue</span> <span class="kw">for</span> <span class="ident">Bytes</span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">InvalidHeaderValueBytes</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="ident">HeaderValue</span>::<span class="ident">from_shared</span>(<span class="self">self</span>)
}
}
<span class="kw">impl</span> <span class="ident">IntoHeaderValue</span> <span class="kw">for</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">InvalidHeaderValueBytes</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="ident">HeaderValue</span>::<span class="ident">from_shared</span>(<span class="ident">Bytes</span>::<span class="ident">from</span>(<span class="self">self</span>))
}
}
<span class="kw">impl</span> <span class="ident">IntoHeaderValue</span> <span class="kw">for</span> <span class="ident">String</span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">InvalidHeaderValueBytes</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="ident">HeaderValue</span>::<span class="ident">from_shared</span>(<span class="ident">Bytes</span>::<span class="ident">from</span>(<span class="self">self</span>))
}
}
<span class="kw">impl</span> <span class="ident">IntoHeaderValue</span> <span class="kw">for</span> <span class="ident">Mime</span> {
<span class="kw">type</span> <span class="ident">Error</span> <span class="op">=</span> <span class="ident">InvalidHeaderValueBytes</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">try_into</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HeaderValue</span>, <span class="self">Self</span>::<span class="ident">Error</span><span class="op">></span> {
<span class="ident">HeaderValue</span>::<span class="ident">from_shared</span>(<span class="ident">Bytes</span>::<span class="ident">from</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="self">self</span>)))
}
}
<span class="doccomment">/// Represents supported types of content encodings</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ContentEncoding</span> {
<span class="doccomment">/// Automatically select encoding based on encoding negotiation</span>
<span class="ident">Auto</span>,
<span class="doccomment">/// A format using the Brotli algorithm</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"brotli"</span>)]</span>
<span class="ident">Br</span>,
<span class="doccomment">/// A format using the zlib structure with deflate algorithm</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="ident">Deflate</span>,
<span class="doccomment">/// Gzip algorithm</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="ident">Gzip</span>,
<span class="doccomment">/// Indicates the identity function (i.e. no compression, nor modification)</span>
<span class="ident">Identity</span>,
}
<span class="kw">impl</span> <span class="ident">ContentEncoding</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="doccomment">/// Is the content compressed?</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_compression</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="ident">ContentEncoding</span>::<span class="ident">Identity</span> <span class="op">|</span> <span class="ident">ContentEncoding</span>::<span class="ident">Auto</span> <span class="op">=></span> <span class="bool-val">false</span>,
<span class="kw">_</span> <span class="op">=></span> <span class="bool-val">true</span>,
}
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="doccomment">/// Convert content encoding to string</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_str</span>(<span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"brotli"</span>)]</span>
<span class="ident">ContentEncoding</span>::<span class="ident">Br</span> <span class="op">=></span> <span class="string">"br"</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="ident">ContentEncoding</span>::<span class="ident">Gzip</span> <span class="op">=></span> <span class="string">"gzip"</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="ident">ContentEncoding</span>::<span class="ident">Deflate</span> <span class="op">=></span> <span class="string">"deflate"</span>,
<span class="ident">ContentEncoding</span>::<span class="ident">Identity</span> <span class="op">|</span> <span class="ident">ContentEncoding</span>::<span class="ident">Auto</span> <span class="op">=></span> <span class="string">"identity"</span>,
}
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="doccomment">/// default quality value</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">quality</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">f64</span> {
<span class="kw">match</span> <span class="self">self</span> {
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"brotli"</span>)]</span>
<span class="ident">ContentEncoding</span>::<span class="ident">Br</span> <span class="op">=></span> <span class="number">1.1</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="ident">ContentEncoding</span>::<span class="ident">Gzip</span> <span class="op">=></span> <span class="number">1.0</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="ident">ContentEncoding</span>::<span class="ident">Deflate</span> <span class="op">=></span> <span class="number">0.9</span>,
<span class="ident">ContentEncoding</span>::<span class="ident">Identity</span> <span class="op">|</span> <span class="ident">ContentEncoding</span>::<span class="ident">Auto</span> <span class="op">=></span> <span class="number">0.1</span>,
}
}
}
<span class="comment">// TODO: remove memory allocation</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">str</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ContentEncoding</span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">str</span>) <span class="op">-></span> <span class="ident">ContentEncoding</span> {
<span class="kw">match</span> <span class="ident">AsRef</span>::<span class="op"><</span><span class="ident">str</span><span class="op">></span>::<span class="ident">as_ref</span>(<span class="kw-2">&</span><span class="ident">s</span>.<span class="ident">trim</span>().<span class="ident">to_lowercase</span>()) {
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"brotli"</span>)]</span>
<span class="string">"br"</span> <span class="op">=></span> <span class="ident">ContentEncoding</span>::<span class="ident">Br</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="string">"gzip"</span> <span class="op">=></span> <span class="ident">ContentEncoding</span>::<span class="ident">Gzip</span>,
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"flate2"</span>)]</span>
<span class="string">"deflate"</span> <span class="op">=></span> <span class="ident">ContentEncoding</span>::<span class="ident">Deflate</span>,
<span class="kw">_</span> <span class="op">=></span> <span class="ident">ContentEncoding</span>::<span class="ident">Identity</span>,
}
}
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">Writer</span> {
<span class="ident">buf</span>: <span class="ident">BytesMut</span>,
}
<span class="kw">impl</span> <span class="ident">Writer</span> {
<span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="ident">Writer</span> {
<span class="ident">Writer</span> {
<span class="ident">buf</span>: <span class="ident">BytesMut</span>::<span class="ident">new</span>(),
}
}
<span class="kw">fn</span> <span class="ident">take</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">Bytes</span> {
<span class="self">self</span>.<span class="ident">buf</span>.<span class="ident">take</span>().<span class="ident">freeze</span>()
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Write</span> <span class="kw">for</span> <span class="ident">Writer</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">write_str</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="self">self</span>.<span class="ident">buf</span>.<span class="ident">extend_from_slice</span>(<span class="ident">s</span>.<span class="ident">as_bytes</span>());
<span class="prelude-val">Ok</span>(())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">write_fmt</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">args</span>: <span class="ident">fmt</span>::<span class="ident">Arguments</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">fmt</span>::<span class="ident">write</span>(<span class="self">self</span>, <span class="ident">args</span>)
}
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="doccomment">/// Reads a comma-delimited raw header into a Vec.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_comma_delimited</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">FromStr</span><span class="op">></span>(
<span class="ident">all</span>: <span class="ident">GetAll</span><span class="op"><</span><span class="ident">HeaderValue</span><span class="op">></span>,
) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">ParseError</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
<span class="kw">for</span> <span class="ident">h</span> <span class="kw">in</span> <span class="ident">all</span> {
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">h</span>.<span class="ident">to_str</span>().<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">ParseError</span>::<span class="ident">Header</span>)<span class="question-mark">?</span>;
<span class="ident">result</span>.<span class="ident">extend</span>(
<span class="ident">s</span>.<span class="ident">split</span>(<span class="string">','</span>)
.<span class="ident">filter_map</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="kw">match</span> <span class="ident">x</span>.<span class="ident">trim</span>() {
<span class="string">""</span> <span class="op">=></span> <span class="prelude-val">None</span>,
<span class="ident">y</span> <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">y</span>),
}).<span class="ident">filter_map</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span>.<span class="ident">trim</span>().<span class="ident">parse</span>().<span class="ident">ok</span>()),
)
}
<span class="prelude-val">Ok</span>(<span class="ident">result</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="doccomment">/// Reads a single string when parsing a header.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_one_raw_str</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">FromStr</span><span class="op">></span>(<span class="ident">val</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">HeaderValue</span><span class="op">></span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">ParseError</span><span class="op">></span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">line</span>) <span class="op">=</span> <span class="ident">val</span> {
<span class="kw">let</span> <span class="ident">line</span> <span class="op">=</span> <span class="ident">line</span>.<span class="ident">to_str</span>().<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">ParseError</span>::<span class="ident">Header</span>)<span class="question-mark">?</span>;
<span class="kw">if</span> <span class="op">!</span><span class="ident">line</span>.<span class="ident">is_empty</span>() {
<span class="kw">return</span> <span class="ident">T</span>::<span class="ident">from_str</span>(<span class="ident">line</span>).<span class="ident">or</span>(<span class="prelude-val">Err</span>(<span class="ident">ParseError</span>::<span class="ident">Header</span>));
}
}
<span class="prelude-val">Err</span>(<span class="ident">ParseError</span>::<span class="ident">Header</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="doccomment">/// Format an array into a comma-delimited string.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">fmt_comma_delimited</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>, <span class="ident">parts</span>: <span class="kw-2">&</span>[<span class="ident">T</span>]) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span>
<span class="kw">where</span>
<span class="ident">T</span>: <span class="ident">fmt</span>::<span class="ident">Display</span>,
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">parts</span>.<span class="ident">iter</span>();
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">part</span>) <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">next</span>() {
<span class="ident">fmt</span>::<span class="ident">Display</span>::<span class="ident">fmt</span>(<span class="ident">part</span>, <span class="ident">f</span>)<span class="question-mark">?</span>;
}
<span class="kw">for</span> <span class="ident">part</span> <span class="kw">in</span> <span class="ident">iter</span> {
<span class="ident">f</span>.<span class="ident">write_str</span>(<span class="string">", "</span>)<span class="question-mark">?</span>;
<span class="ident">fmt</span>::<span class="ident">Display</span>::<span class="ident">fmt</span>(<span class="ident">part</span>, <span class="ident">f</span>)<span class="question-mark">?</span>;
}
<span class="prelude-val">Ok</span>(())
}
<span class="comment">// From hyper v0.11.27 src/header/parsing.rs</span>
<span class="doccomment">/// The value part of an extended parameter consisting of three parts:</span>
<span class="doccomment">/// the REQUIRED character set name (`charset`), the OPTIONAL language information (`language_tag`),</span>
<span class="doccomment">/// and a character sequence representing the actual value (`value`), separated by single quote</span>
<span class="doccomment">/// characters. It is defined in [RFC 5987](https://tools.ietf.org/html/rfc5987#section-3.2).</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ExtendedValue</span> {
<span class="doccomment">/// The character set that is used to encode the `value` to a string.</span>
<span class="kw">pub</span> <span class="ident">charset</span>: <span class="ident">Charset</span>,
<span class="doccomment">/// The human language details of the `value`, if available.</span>
<span class="kw">pub</span> <span class="ident">language_tag</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">LanguageTag</span><span class="op">></span>,
<span class="doccomment">/// The parameter value, as expressed in octets.</span>
<span class="kw">pub</span> <span class="ident">value</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>,
}
<span class="doccomment">/// Parses extended header parameter values (`ext-value`), as defined in</span>
<span class="doccomment">/// [RFC 5987](https://tools.ietf.org/html/rfc5987#section-3.2).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Extended values are denoted by parameter names that end with `*`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ## ABNF</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```text</span>
<span class="doccomment">/// ext-value = charset "'" [ language ] "'" value-chars</span>
<span class="doccomment">/// ; like RFC 2231's <extended-initial-value></span>
<span class="doccomment">/// ; (see [RFC2231], Section 7)</span>
<span class="doccomment">///</span>
<span class="doccomment">/// charset = "UTF-8" / "ISO-8859-1" / mime-charset</span>
<span class="doccomment">///</span>
<span class="doccomment">/// mime-charset = 1*mime-charsetc</span>
<span class="doccomment">/// mime-charsetc = ALPHA / DIGIT</span>
<span class="doccomment">/// / "!" / "#" / "$" / "%" / "&"</span>
<span class="doccomment">/// / "+" / "-" / "^" / "_" / "`"</span>
<span class="doccomment">/// / "{" / "}" / "~"</span>
<span class="doccomment">/// ; as <mime-charset> in Section 2.3 of [RFC2978]</span>
<span class="doccomment">/// ; except that the single quote is not included</span>
<span class="doccomment">/// ; SHOULD be registered in the IANA charset registry</span>
<span class="doccomment">///</span>
<span class="doccomment">/// language = <Language-Tag, defined in [RFC5646], Section 2.1></span>
<span class="doccomment">///</span>
<span class="doccomment">/// value-chars = *( pct-encoded / attr-char )</span>
<span class="doccomment">///</span>
<span class="doccomment">/// pct-encoded = "%" HEXDIG HEXDIG</span>
<span class="doccomment">/// ; see [RFC3986], Section 2.1</span>
<span class="doccomment">///</span>
<span class="doccomment">/// attr-char = ALPHA / DIGIT</span>
<span class="doccomment">/// / "!" / "#" / "$" / "&" / "+" / "-" / "."</span>
<span class="doccomment">/// / "^" / "_" / "`" / "|" / "~"</span>
<span class="doccomment">/// ; token except ( "*" / "'" / "%" )</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parse_extended_value</span>(<span class="ident">val</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">ExtendedValue</span>, ::<span class="ident">error</span>::<span class="ident">ParseError</span><span class="op">></span> {
<span class="comment">// Break into three pieces separated by the single-quote character</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">parts</span> <span class="op">=</span> <span class="ident">val</span>.<span class="ident">splitn</span>(<span class="number">3</span>, <span class="string">'\''</span>);
<span class="comment">// Interpret the first piece as a Charset</span>
<span class="kw">let</span> <span class="ident">charset</span>: <span class="ident">Charset</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">parts</span>.<span class="ident">next</span>() {
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(::<span class="ident">error</span>::<span class="ident">ParseError</span>::<span class="ident">Header</span>),
<span class="prelude-val">Some</span>(<span class="ident">n</span>) <span class="op">=></span> <span class="ident">FromStr</span>::<span class="ident">from_str</span>(<span class="ident">n</span>).<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ::<span class="ident">error</span>::<span class="ident">ParseError</span>::<span class="ident">Header</span>)<span class="question-mark">?</span>,
};
<span class="comment">// Interpret the second piece as a language tag</span>
<span class="kw">let</span> <span class="ident">language_tag</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">LanguageTag</span><span class="op">></span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">parts</span>.<span class="ident">next</span>() {
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(::<span class="ident">error</span>::<span class="ident">ParseError</span>::<span class="ident">Header</span>),
<span class="prelude-val">Some</span>(<span class="string">""</span>) <span class="op">=></span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="kw">match</span> <span class="ident">s</span>.<span class="ident">parse</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">lt</span>) <span class="op">=></span> <span class="prelude-val">Some</span>(<span class="ident">lt</span>),
<span class="prelude-val">Err</span>(<span class="kw">_</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(::<span class="ident">error</span>::<span class="ident">ParseError</span>::<span class="ident">Header</span>),
},
};
<span class="comment">// Interpret the third piece as a sequence of value characters</span>
<span class="kw">let</span> <span class="ident">value</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">parts</span>.<span class="ident">next</span>() {
<span class="prelude-val">None</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(::<span class="ident">error</span>::<span class="ident">ParseError</span>::<span class="ident">Header</span>),
<span class="prelude-val">Some</span>(<span class="ident">v</span>) <span class="op">=></span> <span class="ident">percent_encoding</span>::<span class="ident">percent_decode</span>(<span class="ident">v</span>.<span class="ident">as_bytes</span>()).<span class="ident">collect</span>(),
};
<span class="prelude-val">Ok</span>(<span class="ident">ExtendedValue</span> {
<span class="ident">value</span>,
<span class="ident">charset</span>,
<span class="ident">language_tag</span>,
})
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">ExtendedValue</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">let</span> <span class="ident">encoded_value</span> <span class="op">=</span> <span class="ident">percent_encoding</span>::<span class="ident">percent_encode</span>(
<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">value</span>[..],
<span class="self">self</span>::<span class="ident">percent_encoding_http</span>::<span class="ident">HTTP_VALUE</span>,
);
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">lang</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">language_tag</span> {
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}'{}'{}"</span>, <span class="self">self</span>.<span class="ident">charset</span>, <span class="ident">lang</span>, <span class="ident">encoded_value</span>)
} <span class="kw">else</span> {
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}''{}"</span>, <span class="self">self</span>.<span class="ident">charset</span>, <span class="ident">encoded_value</span>)
}
}
}
<span class="doccomment">/// Percent encode a sequence of bytes with a character set defined in</span>
<span class="doccomment">/// [https://tools.ietf.org/html/rfc5987#section-3.2][url]</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [url]: https://tools.ietf.org/html/rfc5987#section-3.2</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">http_percent_encode</span>(<span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>, <span class="ident">bytes</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">let</span> <span class="ident">encoded</span> <span class="op">=</span>
<span class="ident">percent_encoding</span>::<span class="ident">percent_encode</span>(<span class="ident">bytes</span>, <span class="self">self</span>::<span class="ident">percent_encoding_http</span>::<span class="ident">HTTP_VALUE</span>);
<span class="ident">fmt</span>::<span class="ident">Display</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span><span class="ident">encoded</span>, <span class="ident">f</span>)
}
<span class="kw">mod</span> <span class="ident">percent_encoding_http</span> {
<span class="kw">use</span> <span class="ident">percent_encoding</span>;
<span class="comment">// internal module because macro is hard-coded to make a public item</span>
<span class="comment">// but we don't want to public export this item</span>
<span class="macro">define_encode_set</span><span class="macro">!</span> {
<span class="comment">// This encode set is used for HTTP header values and is defined at</span>
<span class="comment">// https://tools.ietf.org/html/rfc5987#section-3.2</span>
<span class="kw">pub</span> <span class="ident">HTTP_VALUE</span> <span class="op">=</span> [<span class="ident">percent_encoding</span>::<span class="ident">SIMPLE_ENCODE_SET</span>] <span class="op">|</span> {
<span class="string">' '</span>, <span class="string">'"'</span>, <span class="string">'%'</span>, <span class="string">'\''</span>, <span class="string">'('</span>, <span class="string">')'</span>, <span class="string">'*'</span>, <span class="string">','</span>, <span class="string">'/'</span>, <span class="string">':'</span>, <span class="string">';'</span>, <span class="string">'<'</span>, <span class="string">'-'</span>, <span class="string">'>'</span>, <span class="string">'?'</span>,
<span class="string">'['</span>, <span class="string">'\\'</span>, <span class="string">']'</span>, <span class="string">'{'</span>, <span class="string">'}'</span>
}
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span> {
<span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">parse_extended_value</span>, <span class="ident">ExtendedValue</span>};
<span class="kw">use</span> <span class="ident">header</span>::<span class="ident">shared</span>::<span class="ident">Charset</span>;
<span class="kw">use</span> <span class="ident">language_tags</span>::<span class="ident">LanguageTag</span>;
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_extended_value_with_encoding_and_language_tag</span>() {
<span class="kw">let</span> <span class="ident">expected_language_tag</span> <span class="op">=</span> <span class="string">"en"</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">LanguageTag</span><span class="op">></span>().<span class="ident">unwrap</span>();
<span class="comment">// RFC 5987, Section 3.2.2</span>
<span class="comment">// Extended notation, using the Unicode character U+00A3 (POUND SIGN)</span>
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">parse_extended_value</span>(<span class="string">"iso-8859-1'en'%A3%20rates"</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_ok</span>());
<span class="kw">let</span> <span class="ident">extended_value</span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Charset</span>::<span class="ident">Iso_8859_1</span>, <span class="ident">extended_value</span>.<span class="ident">charset</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">extended_value</span>.<span class="ident">language_tag</span>.<span class="ident">is_some</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">expected_language_tag</span>, <span class="ident">extended_value</span>.<span class="ident">language_tag</span>.<span class="ident">unwrap</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="macro">vec</span><span class="macro">!</span>[<span class="number">163</span>, <span class="string">b' '</span>, <span class="string">b'r'</span>, <span class="string">b'a'</span>, <span class="string">b't'</span>, <span class="string">b'e'</span>, <span class="string">b's'</span>],
<span class="ident">extended_value</span>.<span class="ident">value</span>
);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_extended_value_with_encoding</span>() {
<span class="comment">// RFC 5987, Section 3.2.2</span>
<span class="comment">// Extended notation, using the Unicode characters U+00A3 (POUND SIGN)</span>
<span class="comment">// and U+20AC (EURO SIGN)</span>
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">parse_extended_value</span>(<span class="string">"UTF-8''%c2%a3%20and%20%e2%82%ac%20rates"</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_ok</span>());
<span class="kw">let</span> <span class="ident">extended_value</span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">unwrap</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Charset</span>::<span class="ident">Ext</span>(<span class="string">"UTF-8"</span>.<span class="ident">to_string</span>()), <span class="ident">extended_value</span>.<span class="ident">charset</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">extended_value</span>.<span class="ident">language_tag</span>.<span class="ident">is_none</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="macro">vec</span><span class="macro">!</span>[
<span class="number">194</span>, <span class="number">163</span>, <span class="string">b' '</span>, <span class="string">b'a'</span>, <span class="string">b'n'</span>, <span class="string">b'd'</span>, <span class="string">b' '</span>, <span class="number">226</span>, <span class="number">130</span>, <span class="number">172</span>, <span class="string">b' '</span>, <span class="string">b'r'</span>, <span class="string">b'a'</span>,
<span class="string">b't'</span>, <span class="string">b'e'</span>, <span class="string">b's'</span>,
],
<span class="ident">extended_value</span>.<span class="ident">value</span>
);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_extended_value_missing_language_tag_and_encoding</span>() {
<span class="comment">// From: https://greenbytes.de/tech/tc2231/#attwithfn2231quot2</span>
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">parse_extended_value</span>(<span class="string">"foo%20bar.html"</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_extended_value_partially_formatted</span>() {
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">parse_extended_value</span>(<span class="string">"UTF-8'missing third part"</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_parse_extended_value_partially_formatted_blank</span>() {
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">parse_extended_value</span>(<span class="string">"blank second part'"</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">result</span>.<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_fmt_extended_value_with_encoding_and_language_tag</span>() {
<span class="kw">let</span> <span class="ident">extended_value</span> <span class="op">=</span> <span class="ident">ExtendedValue</span> {
<span class="ident">charset</span>: <span class="ident">Charset</span>::<span class="ident">Iso_8859_1</span>,
<span class="ident">language_tag</span>: <span class="prelude-val">Some</span>(<span class="string">"en"</span>.<span class="ident">parse</span>().<span class="ident">expect</span>(<span class="string">"Could not parse language tag"</span>)),
<span class="ident">value</span>: <span class="macro">vec</span><span class="macro">!</span>[<span class="number">163</span>, <span class="string">b' '</span>, <span class="string">b'r'</span>, <span class="string">b'a'</span>, <span class="string">b't'</span>, <span class="string">b'e'</span>, <span class="string">b's'</span>],
};
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"ISO-8859-1'en'%A3%20rates"</span>, <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">extended_value</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_fmt_extended_value_with_encoding</span>() {
<span class="kw">let</span> <span class="ident">extended_value</span> <span class="op">=</span> <span class="ident">ExtendedValue</span> {
<span class="ident">charset</span>: <span class="ident">Charset</span>::<span class="ident">Ext</span>(<span class="string">"UTF-8"</span>.<span class="ident">to_string</span>()),
<span class="ident">language_tag</span>: <span class="prelude-val">None</span>,
<span class="ident">value</span>: <span class="macro">vec</span><span class="macro">!</span>[
<span class="number">194</span>, <span class="number">163</span>, <span class="string">b' '</span>, <span class="string">b'a'</span>, <span class="string">b'n'</span>, <span class="string">b'd'</span>, <span class="string">b' '</span>, <span class="number">226</span>, <span class="number">130</span>, <span class="number">172</span>, <span class="string">b' '</span>, <span class="string">b'r'</span>, <span class="string">b'a'</span>,
<span class="string">b't'</span>, <span class="string">b'e'</span>, <span class="string">b's'</span>,
],
};
<span class="macro">assert_eq</span><span class="macro">!</span>(
<span class="string">"UTF-8''%C2%A3%20and%20%E2%82%AC%20rates"</span>,
<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">extended_value</span>)
);
}
}
</pre>
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