You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
315 lines
22 KiB
315 lines
22 KiB
<!DOCTYPE HTML>
|
|
<html lang="zh-CN" class="sidebar-visible no-js light">
|
|
<head>
|
|
<!-- Book generated using mdBook -->
|
|
<meta charset="UTF-8">
|
|
<title>配置日志 - Rusty Book(锈书)</title>
|
|
<!-- Custom HTML head -->
|
|
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
|
|
<meta name="description" content="">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1">
|
|
<meta name="theme-color" content="#ffffff" />
|
|
|
|
<link rel="icon" href="../favicon.svg">
|
|
<link rel="shortcut icon" href="../favicon.png">
|
|
<link rel="stylesheet" href="../css/variables.css">
|
|
<link rel="stylesheet" href="../css/general.css">
|
|
<link rel="stylesheet" href="../css/chrome.css">
|
|
<link rel="stylesheet" href="../css/print.css" media="print">
|
|
<!-- Fonts -->
|
|
<link rel="stylesheet" href="../FontAwesome/css/font-awesome.css">
|
|
<link rel="stylesheet" href="../fonts/fonts.css">
|
|
<!-- Highlight.js Stylesheets -->
|
|
<link rel="stylesheet" href="../highlight.css">
|
|
<link rel="stylesheet" href="../tomorrow-night.css">
|
|
<link rel="stylesheet" href="../ayu-highlight.css">
|
|
|
|
<!-- Custom theme stylesheets -->
|
|
<link rel="stylesheet" href="../theme/style1.css">
|
|
</head>
|
|
<body>
|
|
<!-- Provide site root to javascript -->
|
|
<script type="text/javascript">
|
|
var path_to_root = "../";
|
|
var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "navy" : "light";
|
|
</script>
|
|
|
|
<!-- Work around some values being stored in localStorage wrapped in quotes -->
|
|
<script type="text/javascript">
|
|
try {
|
|
var theme = localStorage.getItem('mdbook-theme');
|
|
var sidebar = localStorage.getItem('mdbook-sidebar');
|
|
if (theme.startsWith('"') && theme.endsWith('"')) {
|
|
localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
|
|
}
|
|
if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
|
|
localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
|
|
}
|
|
} catch (e) { }
|
|
</script>
|
|
|
|
<!-- Set the theme before any content is loaded, prevents flash -->
|
|
<script type="text/javascript">
|
|
var theme;
|
|
try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
|
|
if (theme === null || theme === undefined) { theme = default_theme; }
|
|
var html = document.querySelector('html');
|
|
html.classList.remove('no-js')
|
|
html.classList.remove('light')
|
|
html.classList.add(theme);
|
|
html.classList.add('js');
|
|
</script>
|
|
|
|
<!-- Hide / unhide sidebar before it is displayed -->
|
|
<script type="text/javascript">
|
|
var html = document.querySelector('html');
|
|
var sidebar = 'hidden';
|
|
if (document.body.clientWidth >= 1080) {
|
|
try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
|
|
sidebar = sidebar || 'visible';
|
|
}
|
|
html.classList.remove('sidebar-visible');
|
|
html.classList.add("sidebar-" + sidebar);
|
|
</script>
|
|
|
|
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
|
|
<div class="sidebar-scrollbox">
|
|
<ol class="chapter"><li class="chapter-item expanded affix "><a href="../about.html">Rusty Book</a></li><li class="chapter-item expanded affix "><li class="part-title">Awesome</li><li class="spacer"></li><li class="chapter-item expanded "><a href="../daily-dev.html">日常开发常用库</a></li><li class="chapter-item expanded "><a href="../superstar.html">Rust 明星项目</a></li><li class="chapter-item expanded "><a href="../empowering-js.html">使用 Rust 增强 JS</a></li><li class="chapter-item expanded "><a href="../games.html">Rust开发的游戏</a></li><li class="chapter-item expanded "><a href="../gamedev.html">游戏引擎</a></li><li class="chapter-item expanded affix "><li class="part-title">Awesome + Cookbook</li><li class="spacer"></li><li class="chapter-item expanded "><a href="../algos/awesome.html">实用算法</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../algos/randomness.html">生成随机值</a></li><li class="chapter-item expanded "><a href="../algos/sorting.html">Vec 排序</a></li><li class="chapter-item expanded "><div>压缩算法</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../algos/compression/tar.html">使用.tar包</a></li></ol></li><li class="chapter-item expanded "><div>密码学</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../algos/cryptography/hashing.html">哈希</a></li><li class="chapter-item "><a href="../algos/cryptography/encryption.html">加密</a></li></ol></li><li class="chapter-item expanded "><div>数学计算</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../algos/math/linear-algebra.html">线性代数</a></li><li class="chapter-item "><a href="../algos/math/trigonometry.html">三角函数</a></li><li class="chapter-item "><a href="../algos/math/complex.html">复数</a></li><li class="chapter-item "><a href="../algos/math/statistics.html">统计学</a></li><li class="chapter-item "><a href="../algos/math/misc.html">杂项</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../datastructures/awesome.html">数据结构</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../datastructures/bitfield.html">位字段</a></li></ol></li><li class="chapter-item expanded "><a href="../cmd/awesome.html">命令行</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../cmd/parsing.html">参数解析</a></li><li class="chapter-item expanded "><a href="../cmd/ansi.html">终端输出格式化</a></li></ol></li><li class="chapter-item expanded "><a href="../os/awesome.html">操作系统</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../os/processor.html">处理器</a></li><li class="chapter-item expanded "><a href="../os/command.html">调用系统命令</a></li></ol></li><li class="chapter-item expanded "><div>并发</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../cocurrency/threads.html">线程</a></li><li class="chapter-item expanded "><a href="../cocurrency/parallel.html">使用rayon并行处理数据</a></li></ol></li><li class="chapter-item expanded "><div>数据库</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../database/sqlite.html">SQLite</a></li><li class="chapter-item expanded "><a href="../database/postgres.html">Postgres</a></li></ol></li><li class="chapter-item expanded "><div>日期和时间</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../datetime/duration.html">时间计算和转换</a></li><li class="chapter-item expanded "><a href="../datetime/parsing.html">解析和显示</a></li></ol></li><li class="chapter-item expanded "><div>开发者工具</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../devtools/log.html">日志</a></li><li class="chapter-item expanded "><a href="../devtools/config-log.html" class="active">配置日志</a></li><li class="chapter-item expanded "><a href="../devtools/version.html">版本号</a></li><li class="chapter-item expanded "><a href="../devtools/build-tools.html">构建时工具</a></li></ol></li><li class="chapter-item expanded "><div>编解码</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../encoding/strings.html">字符编码</a></li><li class="chapter-item expanded "><a href="../encoding/csv.html">CSV</a></li><li class="chapter-item expanded "><a href="../encoding/structured.html">结构化数据</a></li></ol></li><li class="chapter-item expanded "><div>错误处理</div></li><li class="chapter-item expanded "><div>文件操作</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../files/read-write.html">文件读写</a></li><li class="chapter-item expanded "><a href="../files/dir.html">目录访问</a></li></ol></li><li class="chapter-item expanded "><div>内存管理</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../memory/global-vars.html">全局变量</a></li></ol></li><li class="chapter-item expanded "><div>网络协议</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../protocols/tcpip.html">TCP/IP</a></li></ol></li><li class="chapter-item expanded "><div>文本处理</div><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../text/regex.html">正则表达式</a></li><li class="chapter-item expanded "><a href="../text/string.html">字符串解析</a></li></ol></li></ol>
|
|
</div>
|
|
<div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
|
|
</nav>
|
|
|
|
<div id="page-wrapper" class="page-wrapper">
|
|
|
|
<div class="page">
|
|
<div id="menu-bar-hover-placeholder"></div>
|
|
<div id="menu-bar" class="menu-bar sticky bordered">
|
|
<div class="left-buttons">
|
|
<button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
|
|
<i class="fa fa-bars"></i>
|
|
</button>
|
|
<button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
|
|
<i class="fa fa-paint-brush"></i>
|
|
</button>
|
|
<ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
|
|
<li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
|
|
</ul>
|
|
<button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
|
|
<i class="fa fa-search"></i>
|
|
</button>
|
|
</div>
|
|
|
|
<h1 class="menu-title">Rusty Book(锈书)</h1>
|
|
|
|
<div class="right-buttons">
|
|
<a href="../print.html" title="Print this book" aria-label="Print this book">
|
|
<i id="print-button" class="fa fa-print"></i>
|
|
</a>
|
|
<a href="https://github.com/studyrs/rusty-book" title="Git repository" aria-label="Git repository">
|
|
<i id="git-repository-button" class="fa fa-github"></i>
|
|
</a>
|
|
<a href="https://github.com/studyrs/rusty-book/edit/main/src/devtools/config-log.md" title="Suggest an edit" aria-label="Suggest an edit">
|
|
<i id="git-edit-button" class="fa fa-edit"></i>
|
|
</a>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="search-wrapper" class="hidden">
|
|
<form id="searchbar-outer" class="searchbar-outer">
|
|
<input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
|
|
</form>
|
|
<div id="searchresults-outer" class="searchresults-outer hidden">
|
|
<div id="searchresults-header" class="searchresults-header"></div>
|
|
<ul id="searchresults">
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
|
|
<script type="text/javascript">
|
|
document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
|
|
document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
|
|
Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
|
|
link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
|
|
});
|
|
</script>
|
|
|
|
<div id="content" class="content">
|
|
<!-- Page table of contents -->
|
|
<div class="sidetoc"><nav class="pagetoc"></nav></div>
|
|
<main>
|
|
<h1 id="配置日志"><a class="header" href="#配置日志">配置日志</a></h1>
|
|
<h3 id="为每个模块开启独立的日志级别"><a class="header" href="#为每个模块开启独立的日志级别">为每个模块开启独立的日志级别</a></h3>
|
|
<p>下面代码创建了模块 <code>foo</code> 和嵌套模块 <code>foo::bar</code>，并通过 <a href="https://docs.rs/env_logger/*/env_logger/#enabling-logging">RUST_LOG</a> 环境变量对各自的日志级别进行了控制。</p>
|
|
<pre><pre class="playground"><code class="language-rust editable edition2021">mod foo {
|
|
mod bar {
|
|
pub fn run() {
|
|
log::warn!("[bar] warn");
|
|
log::info!("[bar] info");
|
|
log::debug!("[bar] debug");
|
|
}
|
|
}
|
|
|
|
pub fn run() {
|
|
log::warn!("[foo] warn");
|
|
log::info!("[foo] info");
|
|
log::debug!("[foo] debug");
|
|
bar::run();
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
env_logger::init();
|
|
log::warn!("[root] warn");
|
|
log::info!("[root] info");
|
|
log::debug!("[root] debug");
|
|
foo::run();
|
|
}
|
|
</code></pre></pre>
|
|
<p>要让环境变量生效，首先需要通过 <code>env_logger::init()</code> 开启相关的支持。然后通过以下命令来运行程序:</p>
|
|
<pre><code class="language-shell">RUST_LOG="warn,test::foo=info,test::foo::bar=debug" ./test
|
|
</code></pre>
|
|
<p>此时的默认日志级别被设置为 <code>warn</code>，但我们还将 <code>foo</code> 模块级别设置为 <code>info</code>, <code>foo::bar</code> 模块日志级别设置为 <code>debug</code>。</p>
|
|
<pre><code class="language-bash">WARN:test: [root] warn
|
|
WARN:test::foo: [foo] warn
|
|
INFO:test::foo: [foo] info
|
|
WARN:test::foo::bar: [bar] warn
|
|
INFO:test::foo::bar: [bar] info
|
|
DEBUG:test::foo::bar: [bar] debug
|
|
</code></pre>
|
|
<h3 id="使用自定义环境变量来设置日志"><a class="header" href="#使用自定义环境变量来设置日志">使用自定义环境变量来设置日志</a></h3>
|
|
<p><a href="https://docs.rs/env_logger/*/env_logger/struct.Builder.html">Builder</a> 将对日志进行配置，以下代码使用 <code>MY_APP_LOG</code> 来替代 <code>RUST_LOG</code> 环境变量:</p>
|
|
<pre><pre class="playground"><code class="language-rust editable edition2021">use std::env;
|
|
use env_logger::Builder;
|
|
|
|
fn main() {
|
|
Builder::new()
|
|
.parse(&env::var("MY_APP_LOG").unwrap_or_default())
|
|
.init();
|
|
|
|
log::info!("informational message");
|
|
log::warn!("warning message");
|
|
log::error!("this is an error {}", "message");
|
|
}
|
|
</code></pre></pre>
|
|
<h3 id="在日志中包含时间戳"><a class="header" href="#在日志中包含时间戳">在日志中包含时间戳</a></h3>
|
|
<pre><pre class="playground"><code class="language-rust editable edition2021">use std::io::Write;
|
|
use chrono::Local;
|
|
use env_logger::Builder;
|
|
use log::LevelFilter;
|
|
|
|
fn main() {
|
|
Builder::new()
|
|
.format(|buf, record| {
|
|
writeln!(buf,
|
|
"{} [{}] - {}",
|
|
Local::now().format("%Y-%m-%dT%H:%M:%S"),
|
|
record.level(),
|
|
record.args()
|
|
)
|
|
})
|
|
.filter(None, LevelFilter::Info)
|
|
.init();
|
|
|
|
log::warn!("warn");
|
|
log::info!("info");
|
|
log::debug!("debug");
|
|
}
|
|
</code></pre></pre>
|
|
<p>以下是 <code>stderr</code> 的输出:</p>
|
|
<pre><code class="language-shell">2022-03-22T21:57:06 [WARN] - warn
|
|
2022-03-22T21:57:06 [INFO] - info
|
|
</code></pre>
|
|
<h3 id="将日志输出到指定文件"><a class="header" href="#将日志输出到指定文件">将日志输出到指定文件</a></h3>
|
|
<p><a href="https://docs.rs/log4rs/">log4rs</a> 可以帮我们将日志输出指定的位置，它可以使用外部 YAML 文件或 <code>builder</code> 的方式进行配置。</p>
|
|
<pre><pre class="playground"><code class="language-rust editable edition2021"><span class="boring">use error_chain::error_chain;
|
|
</span>
|
|
use log::LevelFilter;
|
|
use log4rs::append::file::FileAppender;
|
|
use log4rs::encode::pattern::PatternEncoder;
|
|
use log4rs::config::{Appender, Config, Root};
|
|
|
|
<span class="boring">error_chain! {
|
|
</span><span class="boring"> foreign_links {
|
|
</span><span class="boring"> Io(std::io::Error);
|
|
</span><span class="boring"> LogConfig(log4rs::config::Errors);
|
|
</span><span class="boring"> SetLogger(log::SetLoggerError);
|
|
</span><span class="boring"> }
|
|
</span><span class="boring">}
|
|
</span>
|
|
fn main() -> Result<()> {
|
|
// 创建日志配置，并指定输出的位置
|
|
let logfile = FileAppender::builder()
|
|
// 编码模式的详情参见: https://docs.rs/log4rs/1.0.0/log4rs/encode/pattern/index.html
|
|
.encoder(Box::new(PatternEncoder::new("{l} - {m}\n")))
|
|
.build("log/output.log")?;
|
|
|
|
let config = Config::builder()
|
|
.appender(Appender::builder().build("logfile", Box::new(logfile)))
|
|
.build(Root::builder()
|
|
.appender("logfile")
|
|
.build(LevelFilter::Info))?;
|
|
|
|
log4rs::init_config(config)?;
|
|
|
|
log::info!("Hello, world!");
|
|
|
|
Ok(())
|
|
}
|
|
|
|
</code></pre></pre>
|
|
|
|
<div id="giscus-container"></div>
|
|
</main>
|
|
|
|
<nav class="nav-wrapper" aria-label="Page navigation">
|
|
<!-- Mobile navigation buttons -->
|
|
<a rel="prev" href="../devtools/log.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
|
|
<i class="fa fa-angle-left"></i>
|
|
</a>
|
|
<a rel="next" href="../devtools/version.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
|
|
<i class="fa fa-angle-right"></i>
|
|
</a>
|
|
<div style="clear: both"></div>
|
|
</nav>
|
|
</div>
|
|
</div>
|
|
|
|
<nav class="nav-wide-wrapper" aria-label="Page navigation">
|
|
<a rel="prev" href="../devtools/log.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
|
|
<i class="fa fa-angle-left"></i>
|
|
</a>
|
|
<a rel="next" href="../devtools/version.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
|
|
<i class="fa fa-angle-right"></i>
|
|
</a>
|
|
</nav>
|
|
|
|
</div>
|
|
|
|
<script type="text/javascript">
|
|
window.playground_copyable = true;
|
|
</script>
|
|
<script src="../ace.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../editor.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../mode-rust.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../theme-dawn.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../theme-tomorrow_night.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../mark.min.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../searcher.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../clipboard.min.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../highlight.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../book.js" type="text/javascript" charset="utf-8"></script>
|
|
<script type="text/javascript" charset="utf-8">
|
|
var pagePath = "devtools/config-log.md"
|
|
</script>
|
|
|
|
|
|
<!-- Custom JS scripts -->
|
|
<script type="text/javascript" src="../assets/custom1.js"></script>
|
|
<script type="text/javascript" src="../assets/bigPicture.js"></script>
|
|
</body>
|
|
</html> |