| <!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/reqwest-0.11.18/src/util.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>util.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="../../reqwest/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="../../reqwest/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="kw">use </span><span class="kw">crate</span>::header::{Entry, HeaderMap, HeaderValue, OccupiedEntry}; |
| |
| <span class="kw">pub fn </span>basic_auth<U, P>(username: U, password: <span class="prelude-ty">Option</span><P>) -> HeaderValue |
| <span class="kw">where |
| </span>U: std::fmt::Display, |
| P: std::fmt::Display, |
| { |
| <span class="kw">use </span>base64::prelude::BASE64_STANDARD; |
| <span class="kw">use </span>base64::write::EncoderWriter; |
| <span class="kw">use </span>std::io::Write; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = <span class="string">b"Basic "</span>.to_vec(); |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>encoder = EncoderWriter::new(<span class="kw-2">&mut </span>buf, <span class="kw-2">&</span>BASE64_STANDARD); |
| <span class="kw">let _ </span>= <span class="macro">write!</span>(encoder, <span class="string">"{}:"</span>, username); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(password) = password { |
| <span class="kw">let _ </span>= <span class="macro">write!</span>(encoder, <span class="string">"{}"</span>, password); |
| } |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>header = HeaderValue::from_bytes(<span class="kw-2">&</span>buf).expect(<span class="string">"base64 is always valid HeaderValue"</span>); |
| header.set_sensitive(<span class="bool-val">true</span>); |
| header |
| } |
| |
| <span class="comment">// xor-shift |
| </span><span class="attribute">#[cfg(not(target_arch = <span class="string">"wasm32"</span>))] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>fast_random() -> u64 { |
| <span class="kw">use </span>std::cell::Cell; |
| <span class="kw">use </span>std::collections::hash_map::RandomState; |
| <span class="kw">use </span>std::hash::{BuildHasher, Hasher}; |
| <span class="kw">use </span>std::num::Wrapping; |
| |
| <span class="macro">thread_local! </span>{ |
| <span class="kw">static </span>RNG: Cell<Wrapping<u64>> = Cell::new(Wrapping(seed())); |
| } |
| |
| <span class="kw">fn </span>seed() -> u64 { |
| <span class="kw">let </span>seed = RandomState::new(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>out = <span class="number">0</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>cnt = <span class="number">0</span>; |
| <span class="kw">while </span>out == <span class="number">0 </span>{ |
| cnt += <span class="number">1</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>hasher = seed.build_hasher(); |
| hasher.write_usize(cnt); |
| out = hasher.finish(); |
| } |
| out |
| } |
| |
| RNG.with(|rng| { |
| <span class="kw">let </span><span class="kw-2">mut </span>n = rng.get(); |
| <span class="macro">debug_assert_ne!</span>(n.<span class="number">0</span>, <span class="number">0</span>); |
| n ^= n >> <span class="number">12</span>; |
| n ^= n << <span class="number">25</span>; |
| n ^= n >> <span class="number">27</span>; |
| rng.set(n); |
| n.<span class="number">0</span>.wrapping_mul(<span class="number">0x2545_f491_4f6c_dd1d</span>) |
| }) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>replace_headers(dst: <span class="kw-2">&mut </span>HeaderMap, src: HeaderMap) { |
| <span class="comment">// IntoIter of HeaderMap yields (Option<HeaderName>, HeaderValue). |
| // The first time a name is yielded, it will be Some(name), and if |
| // there are more values with the same name, the next yield will be |
| // None. |
| |
| </span><span class="kw">let </span><span class="kw-2">mut </span>prev_entry: <span class="prelude-ty">Option</span><OccupiedEntry<<span class="kw">_</span>>> = <span class="prelude-val">None</span>; |
| <span class="kw">for </span>(key, value) <span class="kw">in </span>src { |
| <span class="kw">match </span>key { |
| <span class="prelude-val">Some</span>(key) => <span class="kw">match </span>dst.entry(key) { |
| Entry::Occupied(<span class="kw-2">mut </span>e) => { |
| e.insert(value); |
| prev_entry = <span class="prelude-val">Some</span>(e); |
| } |
| Entry::Vacant(e) => { |
| <span class="kw">let </span>e = e.insert_entry(value); |
| prev_entry = <span class="prelude-val">Some</span>(e); |
| } |
| }, |
| <span class="prelude-val">None </span>=> <span class="kw">match </span>prev_entry { |
| <span class="prelude-val">Some</span>(<span class="kw-2">ref mut </span>entry) => { |
| entry.append(value); |
| } |
| <span class="prelude-val">None </span>=> <span class="macro">unreachable!</span>(<span class="string">"HeaderMap::into_iter yielded None first"</span>), |
| }, |
| } |
| } |
| } |
| </code></pre></div> |
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