mirror of
https://github.com/gopl-zh/gopl-zh.github.com.git
synced 2024-11-24 15:18:57 +00:00
363 lines
36 KiB
HTML
363 lines
36 KiB
HTML
|
<!DOCTYPE HTML>
|
|||
|
<html lang="zh" class="sidebar-visible no-js light">
|
|||
|
<head>
|
|||
|
<!-- Book generated using mdBook -->
|
|||
|
<meta charset="UTF-8">
|
|||
|
<title>Web服务 - Go语言圣经</title>
|
|||
|
|
|||
|
|
|||
|
<!-- Custom HTML head -->
|
|||
|
|
|||
|
|
|||
|
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
|
|||
|
<meta name="description" content="<The Go Programming Language>中文版">
|
|||
|
<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="../style.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="../index.html">Go语言圣经</a></li><li class="chapter-item expanded affix "><a href="../preface.html">前言</a></li><li class="chapter-item expanded "><a href="../ch1/ch1.html"><strong aria-hidden="true">1.</strong> 入门</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../ch1/ch1-01.html"><strong aria-hidden="true">1.1.</strong> Hello, World</a></li><li class="chapter-item expanded "><a href="../ch1/ch1-02.html"><strong aria-hidden="true">1.2.</strong> 命令行参数</a></li><li class="chapter-item expanded "><a href="../ch1/ch1-03.html"><strong aria-hidden="true">1.3.</strong> 查找重复的行</a></li><li class="chapter-item expanded "><a href="../ch1/ch1-04.html"><strong aria-hidden="true">1.4.</strong> GIF动画</a></li><li class="chapter-item expanded "><a href="../ch1/ch1-05.html"><strong aria-hidden="true">1.5.</strong> 获取URL</a></li><li class="chapter-item expanded "><a href="../ch1/ch1-06.html"><strong aria-hidden="true">1.6.</strong> 并发获取多个URL</a></li><li class="chapter-item expanded "><a href="../ch1/ch1-07.html" class="active"><strong aria-hidden="true">1.7.</strong> Web服务</a></li><li class="chapter-item expanded "><a href="../ch1/ch1-08.html"><strong aria-hidden="true">1.8.</strong> 本章要点</a></li></ol></li><li class="chapter-item expanded "><a href="../ch2/ch2.html"><strong aria-hidden="true">2.</strong> 程序结构</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../ch2/ch2-01.html"><strong aria-hidden="true">2.1.</strong> 命名</a></li><li class="chapter-item expanded "><a href="../ch2/ch2-02.html"><strong aria-hidden="true">2.2.</strong> 声明</a></li><li class="chapter-item expanded "><a href="../ch2/ch2-03.html"><strong aria-hidden="true">2.3.</strong> 变量</a></li><li class="chapter-item expanded "><a href="../ch2/ch2-04.html"><strong aria-hidden="true">2.4.</strong> 赋值</a></li><li class="chapter-item expanded "><a href="../ch2/ch2-05.html"><strong aria-hidden="true">2.5.</strong> 类型</a></li><li class="chapter-item expanded "><a href="../ch2/ch2-06.html"><strong aria-hidden="true">2.6.</strong> 包和文件</a></li><li class="chapter-item expanded "><a href="../ch2/ch2-07.html"><strong aria-hidden="true">2.7.</strong> 作用域</a></li></ol></li><li class="chapter-item expanded "><a href="../ch3/ch3.html"><strong aria-hidden="true">3.</strong> 基础数据类型</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../ch3/ch3-01.html"><strong aria-hidden="true">3.1.</strong> 整型</a></li><li class="chapter-item expanded "><a href="../ch3/ch3-02.html"><strong aria-hidden="true">3.2.</strong> 浮点数</a></li><li class="chapter-item expanded "><a href="../ch3/ch3-03.html"><strong aria-hidden="true">3.3.</strong> 复数</a></li><li class="chapter-item expanded "><a href="../ch3/ch3-04.html"><strong aria-hidden="true">3.4.</strong> 布尔型</a></li><li class="chapter-item expanded "><a href="../ch3/ch3-05.html"><strong aria-hidden="true">3.5.</strong> 字符串</a></li><li class="chapter-item expanded "><a href="../ch3/ch3-06.html"><strong aria-hidden="true">3.6.</strong> 常量</a></li></ol></li><li class="chapter-item expanded "><a href="../ch4/ch4.html"><strong aria-hidden="true">4.</strong> 复合数据类型</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../ch4/ch4-01.html"><strong aria-hidden="true">4.1.</strong> 数组</a></li><li class="chapter-item expanded "><a href="../ch4/ch4-02.html"><strong aria-hidden="true">4.2.</strong> Slice</a></li><li class="chapter-item expanded "><a href="../ch4/ch4-03.html"><strong aria-hidden="true">4.3.</strong> Map</a></li><li class="chapter-item expanded "><a href="../ch4/ch4-04.html"><strong aria-hidden="true">4.4.</strong> 结构体</a></li><li class="chapter-item expanded "><a href="../ch4/ch4-05.html"><strong aria-hidden="true">4.5.</strong> JSON</a></li><li class="chapter-item expanded "><a href="../ch4/ch4-06.html"><s
|
|||
|
<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">Go语言圣经</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/gopl-zh/gopl-zh.github.com" title="Git repository" aria-label="Git repository">
|
|||
|
<i id="git-repository-button" class="fa fa-github"></i>
|
|||
|
</a>
|
|||
|
<a href="https://github.com/gopl-zh/gopl-zh.github.com/edit/master/./ch1/ch1-07.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>
|
|||
|
<!-- 头部 -->
|
|||
|
<ul dir="auto">
|
|||
|
<li><em>KusonStack一站式可编程配置技术栈: <a href="https://github.com/KusionStack/kusion">https://github.com/KusionStack/kusion</a></em></li>
|
|||
|
<li><em>凹语言™: <a href="https://github.com/wa-lang/wa">https://github.com/wa-lang/wa</a></em></li>
|
|||
|
</ul>
|
|||
|
<hr>
|
|||
|
|
|||
|
<h2 id="17-web服务"><a class="header" href="#17-web服务">1.7. Web服务</a></h2>
|
|||
|
<p>Go语言的内置库使得写一个类似fetch的web服务器变得异常地简单。在本节中,我们会展示一个微型服务器,这个服务器的功能是返回当前用户正在访问的URL。比如用户访问的是 http://localhost:8000/hello ,那么响应是URL.Path = "hello"。</p>
|
|||
|
<p><u><i>gopl.io/ch1/server1</i></u></p>
|
|||
|
<pre><code class="language-go">// Server1 is a minimal "echo" server.
|
|||
|
package main
|
|||
|
|
|||
|
import (
|
|||
|
"fmt"
|
|||
|
"log"
|
|||
|
"net/http"
|
|||
|
)
|
|||
|
|
|||
|
func main() {
|
|||
|
http.HandleFunc("/", handler) // each request calls handler
|
|||
|
log.Fatal(http.ListenAndServe("localhost:8000", nil))
|
|||
|
}
|
|||
|
|
|||
|
// handler echoes the Path component of the request URL r.
|
|||
|
func handler(w http.ResponseWriter, r *http.Request) {
|
|||
|
fmt.Fprintf(w, "URL.Path = %q\n", r.URL.Path)
|
|||
|
}
|
|||
|
</code></pre>
|
|||
|
<p>我们只用了八九行代码就实现了一个Web服务程序,这都是多亏了标准库里的方法已经帮我们完成了大量工作。main函数将所有发送到/路径下的请求和handler函数关联起来,/开头的请求其实就是所有发送到当前站点上的请求,服务监听8000端口。发送到这个服务的“请求”是一个http.Request类型的对象,这个对象中包含了请求中的一系列相关字段,其中就包括我们需要的URL。当请求到达服务器时,这个请求会被传给handler函数来处理,这个函数会将/hello这个路径从请求的URL中解析出来,然后把其发送到响应中,这里我们用的是标准输出流的fmt.Fprintf。Web服务会在第7.7节中做更详细的阐述。</p>
|
|||
|
<p>让我们在后台运行这个服务程序。如果你的操作系统是Mac OS X或者Linux,那么在运行命令的末尾加上一个&符号,即可让程序简单地跑在后台,windows下可以在另外一个命令行窗口去运行这个程序。</p>
|
|||
|
<pre><code>$ go run src/gopl.io/ch1/server1/main.go &
|
|||
|
</code></pre>
|
|||
|
<p>现在可以通过命令行来发送客户端请求了:</p>
|
|||
|
<pre><code>$ go build gopl.io/ch1/fetch
|
|||
|
$ ./fetch http://localhost:8000
|
|||
|
URL.Path = "/"
|
|||
|
$ ./fetch http://localhost:8000/help
|
|||
|
URL.Path = "/help"
|
|||
|
</code></pre>
|
|||
|
<p>还可以直接在浏览器里访问这个URL,然后得到返回结果,如图1.2:</p>
|
|||
|
<p><img src="../images/ch1-02.png" alt="" /></p>
|
|||
|
<p>在这个服务的基础上叠加特性是很容易的。一种比较实用的修改是为访问的url添加某种状态。比如,下面这个版本输出了同样的内容,但是会对请求的次数进行计算;对URL的请求结果会包含各种URL被访问的总次数,直接对/count这个URL的访问要除外。</p>
|
|||
|
<p><u><i>gopl.io/ch1/server2</i></u></p>
|
|||
|
<pre><code class="language-go">// Server2 is a minimal "echo" and counter server.
|
|||
|
package main
|
|||
|
|
|||
|
import (
|
|||
|
"fmt"
|
|||
|
"log"
|
|||
|
"net/http"
|
|||
|
"sync"
|
|||
|
)
|
|||
|
|
|||
|
var mu sync.Mutex
|
|||
|
var count int
|
|||
|
|
|||
|
func main() {
|
|||
|
http.HandleFunc("/", handler)
|
|||
|
http.HandleFunc("/count", counter)
|
|||
|
log.Fatal(http.ListenAndServe("localhost:8000", nil))
|
|||
|
}
|
|||
|
|
|||
|
// handler echoes the Path component of the requested URL.
|
|||
|
func handler(w http.ResponseWriter, r *http.Request) {
|
|||
|
mu.Lock()
|
|||
|
count++
|
|||
|
mu.Unlock()
|
|||
|
fmt.Fprintf(w, "URL.Path = %q\n", r.URL.Path)
|
|||
|
}
|
|||
|
|
|||
|
// counter echoes the number of calls so far.
|
|||
|
func counter(w http.ResponseWriter, r *http.Request) {
|
|||
|
mu.Lock()
|
|||
|
fmt.Fprintf(w, "Count %d\n", count)
|
|||
|
mu.Unlock()
|
|||
|
}
|
|||
|
</code></pre>
|
|||
|
<p>这个服务器有两个请求处理函数,根据请求的url不同会调用不同的函数:对/count这个url的请求会调用到counter这个函数,其它的url都会调用默认的处理函数。如果你的请求pattern是以/结尾,那么所有以该url为前缀的url都会被这条规则匹配。在这些代码的背后,服务器每一次接收请求处理时都会另起一个goroutine,这样服务器就可以同一时间处理多个请求。然而在并发情况下,假如真的有两个请求同一时刻去更新count,那么这个值可能并不会被正确地增加;这个程序可能会引发一个严重的bug:竞态条件(参见9.1)。为了避免这个问题,我们必须保证每次修改变量的最多只能有一个goroutine,这也就是代码里的mu.Lock()和mu.Unlock()调用将修改count的所有行为包在中间的目的。第九章中我们会进一步讲解共享变量。</p>
|
|||
|
<p>下面是一个更为丰富的例子,handler函数会把请求的http头和请求的form数据都打印出来,这样可以使检查和调试这个服务更为方便:</p>
|
|||
|
<p><u><i>gopl.io/ch1/server3</i></u></p>
|
|||
|
<pre><code class="language-go">// handler echoes the HTTP request.
|
|||
|
func handler(w http.ResponseWriter, r *http.Request) {
|
|||
|
fmt.Fprintf(w, "%s %s %s\n", r.Method, r.URL, r.Proto)
|
|||
|
for k, v := range r.Header {
|
|||
|
fmt.Fprintf(w, "Header[%q] = %q\n", k, v)
|
|||
|
}
|
|||
|
fmt.Fprintf(w, "Host = %q\n", r.Host)
|
|||
|
fmt.Fprintf(w, "RemoteAddr = %q\n", r.RemoteAddr)
|
|||
|
if err := r.ParseForm(); err != nil {
|
|||
|
log.Print(err)
|
|||
|
}
|
|||
|
for k, v := range r.Form {
|
|||
|
fmt.Fprintf(w, "Form[%q] = %q\n", k, v)
|
|||
|
}
|
|||
|
}
|
|||
|
</code></pre>
|
|||
|
<p>我们用http.Request这个struct里的字段来输出下面这样的内容:</p>
|
|||
|
<pre><code>GET /?q=query HTTP/1.1
|
|||
|
Header["Accept-Encoding"] = ["gzip, deflate, sdch"]
|
|||
|
Header["Accept-Language"] = ["en-US,en;q=0.8"]
|
|||
|
Header["Connection"] = ["keep-alive"]
|
|||
|
Header["Accept"] = ["text/html,application/xhtml+xml,application/xml;..."]
|
|||
|
Header["User-Agent"] = ["Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5)..."]
|
|||
|
Host = "localhost:8000"
|
|||
|
RemoteAddr = "127.0.0.1:59911"
|
|||
|
Form["q"] = ["query"]
|
|||
|
</code></pre>
|
|||
|
<p>可以看到这里的ParseForm被嵌套在了if语句中。Go语言允许这样的一个简单的语句结果作为局部的变量声明出现在if语句的最前面,这一点对错误处理很有用处。我们还可以像下面这样写(当然看起来就长了一些):</p>
|
|||
|
<pre><code class="language-go">err := r.ParseForm()
|
|||
|
if err != nil {
|
|||
|
log.Print(err)
|
|||
|
}
|
|||
|
</code></pre>
|
|||
|
<p>用if和ParseForm结合可以让代码更加简单,并且可以限制err这个变量的作用域,这么做是很不错的。我们会在2.7节中讲解作用域。</p>
|
|||
|
<p>在这些程序中,我们看到了很多不同的类型被输出到标准输出流中。比如前面的fetch程序,把HTTP的响应数据拷贝到了os.Stdout,lissajous程序里我们输出的是一个文件。fetchall程序则完全忽略到了HTTP的响应Body,只是计算了一下响应Body的大小,这个程序中把响应Body拷贝到了ioutil.Discard。在本节的web服务器程序中则是用fmt.Fprintf直接写到了http.ResponseWriter中。</p>
|
|||
|
<p>尽管三种具体的实现流程并不太一样,他们都实现一个共同的接口,即当它们被调用需要一个标准流输出时都可以满足。这个接口叫作io.Writer,在7.1节中会详细讨论。</p>
|
|||
|
<p>Go语言的接口机制会在第7章中讲解,为了在这里简单说明接口能做什么,让我们简单地将这里的web服务器和之前写的lissajous函数结合起来,这样GIF动画可以被写到HTTP的客户端,而不是之前的标准输出流。只要在web服务器的代码里加入下面这几行。</p>
|
|||
|
<pre><code class="language-Go">handler := func(w http.ResponseWriter, r *http.Request) {
|
|||
|
lissajous(w)
|
|||
|
}
|
|||
|
http.HandleFunc("/", handler)
|
|||
|
</code></pre>
|
|||
|
<p>或者另一种等价形式:</p>
|
|||
|
<pre><code class="language-Go">http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|||
|
lissajous(w)
|
|||
|
})
|
|||
|
</code></pre>
|
|||
|
<p>HandleFunc函数的第二个参数是一个函数的字面值,也就是一个在使用时定义的匿名函数。这些内容我们会在5.6节中讲解。</p>
|
|||
|
<p>做完这些修改之后,在浏览器里访问 http://localhost:8000 。每次你载入这个页面都可以看到一个像图1.3那样的动画。</p>
|
|||
|
<p><img src="../images/ch1-03.png" alt="" /></p>
|
|||
|
<p><strong>练习 1.12:</strong> 修改Lissajour服务,从URL读取变量,比如你可以访问 http://localhost:8000/?cycles=20 这个URL,这样访问可以将程序里的cycles默认的5修改为20。字符串转换为数字可以调用strconv.Atoi函数。你可以在godoc里查看strconv.Atoi的详细说明。</p>
|
|||
|
|
|||
|
|
|||
|
<!-- 公众号 -->
|
|||
|
<hr>
|
|||
|
<table>
|
|||
|
<tr>
|
|||
|
<td>
|
|||
|
<img width="222px" src="https://chai2010.cn/advanced-go-programming-book/css.png">
|
|||
|
</td>
|
|||
|
<td>
|
|||
|
<img width="222px" src="https://chai2010.cn/advanced-go-programming-book/cch.png">
|
|||
|
</td>
|
|||
|
</tr>
|
|||
|
</table>
|
|||
|
|
|||
|
<div id="giscus-container"></div>
|
|||
|
<footer class="page-footer">
|
|||
|
<span>© 2015-2016 | <a href="https://github.com/gopl-zh"> Go语言圣经中文版</a>, 仅学习交流使用</span>
|
|||
|
</footer>
|
|||
|
</main>
|
|||
|
|
|||
|
<nav class="nav-wrapper" aria-label="Page navigation">
|
|||
|
<!-- Mobile navigation buttons -->
|
|||
|
<a rel="prev" href="../ch1/ch1-06.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="../ch1/ch1-08.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="../ch1/ch1-06.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="../ch1/ch1-08.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="../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 = "ch1/ch1-07.md"
|
|||
|
</script>
|
|||
|
|
|||
|
|
|||
|
<!-- Custom JS scripts -->
|
|||
|
<script type="text/javascript" src="../js/custom.js"></script>
|
|||
|
<script type="text/javascript" src="../js/bigPicture.js"></script>
|
|||
|
|
|||
|
|
|||
|
</body>
|
|||
|
</html>
|