| <!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 `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.26/src/headers.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>headers.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" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../hyper/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../hyper/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">use </span>bytes::BytesMut; |
| <span class="kw">use </span>http::header::CONTENT_LENGTH; |
| <span class="kw">use </span>http::header::{HeaderValue, ValueIter}; |
| <span class="kw">use </span>http::HeaderMap; |
| <span class="attribute">#[cfg(all(feature = <span class="string">"http2"</span>, feature = <span class="string">"client"</span>))] |
| </span><span class="kw">use </span>http::Method; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>connection_keep_alive(value: <span class="kw-2">&</span>HeaderValue) -> bool { |
| connection_has(value, <span class="string">"keep-alive"</span>) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>connection_close(value: <span class="kw-2">&</span>HeaderValue) -> bool { |
| connection_has(value, <span class="string">"close"</span>) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">fn </span>connection_has(value: <span class="kw-2">&</span>HeaderValue, needle: <span class="kw-2">&</span>str) -> bool { |
| <span class="kw">if let </span><span class="prelude-val">Ok</span>(s) = value.to_str() { |
| <span class="kw">for </span>val <span class="kw">in </span>s.split(<span class="string">','</span>) { |
| <span class="kw">if </span>val.trim().eq_ignore_ascii_case(needle) { |
| <span class="kw">return </span><span class="bool-val">true</span>; |
| } |
| } |
| } |
| <span class="bool-val">false |
| </span>} |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"http1"</span>, feature = <span class="string">"server"</span>))] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>content_length_parse(value: <span class="kw-2">&</span>HeaderValue) -> <span class="prelude-ty">Option</span><u64> { |
| from_digits(value.as_bytes()) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>content_length_parse_all(headers: <span class="kw-2">&</span>HeaderMap) -> <span class="prelude-ty">Option</span><u64> { |
| content_length_parse_all_values(headers.get_all(CONTENT_LENGTH).into_iter()) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>content_length_parse_all_values(values: ValueIter<<span class="lifetime">'_</span>, HeaderValue>) -> <span class="prelude-ty">Option</span><u64> { |
| <span class="comment">// If multiple Content-Length headers were sent, everything can still |
| // be alright if they all contain the same value, and all parse |
| // correctly. If not, then it's an error. |
| |
| </span><span class="kw">let </span><span class="kw-2">mut </span>content_length: <span class="prelude-ty">Option</span><u64> = <span class="prelude-val">None</span>; |
| <span class="kw">for </span>h <span class="kw">in </span>values { |
| <span class="kw">if let </span><span class="prelude-val">Ok</span>(line) = h.to_str() { |
| <span class="kw">for </span>v <span class="kw">in </span>line.split(<span class="string">','</span>) { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(n) = from_digits(v.trim().as_bytes()) { |
| <span class="kw">if </span>content_length.is_none() { |
| content_length = <span class="prelude-val">Some</span>(n) |
| } <span class="kw">else if </span>content_length != <span class="prelude-val">Some</span>(n) { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">None |
| </span>} |
| } |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">return </span>content_length |
| } |
| |
| <span class="kw">fn </span>from_digits(bytes: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><u64> { |
| <span class="comment">// cannot use FromStr for u64, since it allows a signed prefix |
| </span><span class="kw">let </span><span class="kw-2">mut </span>result = <span class="number">0u64</span>; |
| <span class="kw">const </span>RADIX: u64 = <span class="number">10</span>; |
| |
| <span class="kw">if </span>bytes.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="kw">for </span><span class="kw-2">&</span>b <span class="kw">in </span>bytes { |
| <span class="comment">// can't use char::to_digit, since we haven't verified these bytes |
| // are utf-8. |
| </span><span class="kw">match </span>b { |
| <span class="string">b'0'</span>..=<span class="string">b'9' </span>=> { |
| result = result.checked_mul(RADIX)<span class="question-mark">?</span>; |
| result = result.checked_add((b - <span class="string">b'0'</span>) <span class="kw">as </span>u64)<span class="question-mark">?</span>; |
| }, |
| <span class="kw">_ </span>=> { |
| <span class="comment">// not a DIGIT, get outta here! |
| </span><span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| } |
| } |
| |
| <span class="prelude-val">Some</span>(result) |
| } |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"http2"</span>, feature = <span class="string">"client"</span>))] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>method_has_defined_payload_semantics(method: <span class="kw-2">&</span>Method) -> bool { |
| <span class="kw">match </span><span class="kw-2">*</span>method { |
| Method::GET | Method::HEAD | Method::DELETE | Method::CONNECT => <span class="bool-val">false</span>, |
| <span class="kw">_ </span>=> <span class="bool-val">true</span>, |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http2"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>set_content_length_if_missing(headers: <span class="kw-2">&mut </span>HeaderMap, len: u64) { |
| headers |
| .entry(CONTENT_LENGTH) |
| .or_insert_with(|| HeaderValue::from(len)); |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>transfer_encoding_is_chunked(headers: <span class="kw-2">&</span>HeaderMap) -> bool { |
| is_chunked(headers.get_all(http::header::TRANSFER_ENCODING).into_iter()) |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>is_chunked(<span class="kw-2">mut </span>encodings: ValueIter<<span class="lifetime">'_</span>, HeaderValue>) -> bool { |
| <span class="comment">// chunked must always be the last encoding, according to spec |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(line) = encodings.next_back() { |
| <span class="kw">return </span>is_chunked_(line); |
| } |
| |
| <span class="bool-val">false |
| </span>} |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>is_chunked_(value: <span class="kw-2">&</span>HeaderValue) -> bool { |
| <span class="comment">// chunked must always be the last encoding, according to spec |
| </span><span class="kw">if let </span><span class="prelude-val">Ok</span>(s) = value.to_str() { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(encoding) = s.rsplit(<span class="string">','</span>).next() { |
| <span class="kw">return </span>encoding.trim().eq_ignore_ascii_case(<span class="string">"chunked"</span>); |
| } |
| } |
| |
| <span class="bool-val">false |
| </span>} |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"http1"</span>)] |
| </span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>add_chunked(<span class="kw-2">mut </span>entry: http::header::OccupiedEntry<<span class="lifetime">'_</span>, HeaderValue>) { |
| <span class="kw">const </span>CHUNKED: <span class="kw-2">&</span>str = <span class="string">"chunked"</span>; |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(line) = entry.iter_mut().next_back() { |
| <span class="comment">// + 2 for ", " |
| </span><span class="kw">let </span>new_cap = line.as_bytes().len() + CHUNKED.len() + <span class="number">2</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = BytesMut::with_capacity(new_cap); |
| buf.extend_from_slice(line.as_bytes()); |
| buf.extend_from_slice(<span class="string">b", "</span>); |
| buf.extend_from_slice(CHUNKED.as_bytes()); |
| |
| <span class="kw-2">*</span>line = HeaderValue::from_maybe_shared(buf.freeze()) |
| .expect(<span class="string">"original header value plus ascii is valid"</span>); |
| <span class="kw">return</span>; |
| } |
| |
| entry.insert(HeaderValue::from_static(CHUNKED)); |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="hyper" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |