Rename http clients/servers to singular language: client/server
This commit is contained in:
Eli Bendersky
parent
cc804d764b
commit
840541a6bd
@ -71,8 +71,8 @@ Command-Line Arguments
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Command-Line Flags
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Command-Line Subcommands
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Environment Variables
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HTTP Clients
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HTTP Servers
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HTTP Client
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HTTP Server
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Context
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Spawning Processes
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Exec'ing Processes
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2
public/context
generated
2
public/context
generated
@ -9,7 +9,7 @@
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onkeydown = (e) => {
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if (e.key == "ArrowLeft") {
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window.location.href = 'http-servers';
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window.location.href = 'http-server';
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}
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4
public/environment-variables
generated
4
public/environment-variables
generated
@ -14,7 +14,7 @@
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if (e.key == "ArrowRight") {
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window.location.href = 'http-clients';
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window.location.href = 'http-client';
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}
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}
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@ -172,7 +172,7 @@ program picks that value up.</p>
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<p class="next">
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Next example: <a href="http-clients">HTTP Clients</a>.
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Next example: <a href="http-client">HTTP Client</a>.
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</p>
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173
public/http-client
generated
Normal file
173
public/http-client
generated
Normal file
@ -0,0 +1,173 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Go by Example: HTTP Client</title>
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<link rel=stylesheet href="site.css">
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</head>
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<script>
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onkeydown = (e) => {
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if (e.key == "ArrowLeft") {
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window.location.href = 'environment-variables';
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}
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if (e.key == "ArrowRight") {
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window.location.href = 'http-server';
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}
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}
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</script>
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<body>
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<div class="example" id="http-client">
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<h2><a href="./">Go by Example</a>: HTTP Client</h2>
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<table>
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<tr>
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<td class="docs">
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<p>The Go standard library comes with excellent support
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for HTTP clients and servers in the <code>net/http</code>
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package. In this example we’ll use it to issue simple
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HTTP requests.</p>
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</td>
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<td class="code leading">
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<a href="https://go.dev/play/p/vFW_el7oHMk"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
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<pre class="chroma">
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<span class="kn">package</span> <span class="nx">main</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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</td>
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<td class="code leading">
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<pre class="chroma"><span class="kn">import</span> <span class="p">(</span>
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<span class="s">"bufio"</span>
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<span class="s">"fmt"</span>
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<span class="s">"net/http"</span>
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<span class="p">)</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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</td>
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<td class="code leading">
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<pre class="chroma"><span class="kd">func</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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<p>Issue an HTTP GET request to a server. <code>http.Get</code> is a
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convenient shortcut around creating an <code>http.Client</code>
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object and calling its <code>Get</code> method; it uses the
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<code>http.DefaultClient</code> object which has useful default
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settings.</p>
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</td>
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<td class="code leading">
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<pre class="chroma">
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<span class="nx">resp</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">http</span><span class="p">.</span><span class="nf">Get</span><span class="p">(</span><span class="s">"https://gobyexample.com"</span><span class="p">)</span>
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<span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
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<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="k">defer</span> <span class="nx">resp</span><span class="p">.</span><span class="nx">Body</span><span class="p">.</span><span class="nf">Close</span><span class="p">()</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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<p>Print the HTTP response status.</p>
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</td>
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<td class="code leading">
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<pre class="chroma">
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<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="s">"Response status:"</span><span class="p">,</span> <span class="nx">resp</span><span class="p">.</span><span class="nx">Status</span><span class="p">)</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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<p>Print the first 5 lines of the response body.</p>
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</td>
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<td class="code leading">
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<pre class="chroma">
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<span class="nx">scanner</span> <span class="o">:=</span> <span class="nx">bufio</span><span class="p">.</span><span class="nf">NewScanner</span><span class="p">(</span><span class="nx">resp</span><span class="p">.</span><span class="nx">Body</span><span class="p">)</span>
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<span class="k">for</span> <span class="nx">i</span> <span class="o">:=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">scanner</span><span class="p">.</span><span class="nf">Scan</span><span class="p">()</span> <span class="o">&&</span> <span class="nx">i</span> <span class="p"><</span> <span class="mi">5</span><span class="p">;</span> <span class="nx">i</span><span class="o">++</span> <span class="p">{</span>
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<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="nx">scanner</span><span class="p">.</span><span class="nf">Text</span><span class="p">())</span>
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<span class="p">}</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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</td>
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<td class="code">
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<pre class="chroma"> <span class="k">if</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">scanner</span><span class="p">.</span><span class="nf">Err</span><span class="p">();</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
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<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</pre>
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td class="docs">
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</td>
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<td class="code">
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<pre class="chroma"><span class="gp">$</span> go run http-clients.go
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<span class="go">Response status: 200 OK
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</span><span class="go"><!DOCTYPE html>
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</span><span class="go"><html>
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</span><span class="go"> <head>
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</span><span class="go"> <meta charset="utf-8">
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</span><span class="go"> <title>Go by Example</title></span></pre>
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</td>
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</tr>
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</table>
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<p class="next">
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Next example: <a href="http-server">HTTP Server</a>.
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</p>
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<p class="footer">
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by <a href="https://markmcgranaghan.com">Mark McGranaghan</a> and <a href="https://eli.thegreenplace.net">Eli Bendersky</a> | <a href="https://github.com/mmcgrana/gobyexample">source</a> | <a href="https://github.com/mmcgrana/gobyexample#license">license</a>
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</p>
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</div>
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<script>
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var codeLines = [];
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codeLines.push('package main\u000A');codeLines.push('import (\u000A \"bufio\"\u000A \"fmt\"\u000A \"net/http\"\u000A)\u000A');codeLines.push('func main() {\u000A');codeLines.push(' resp, err :\u003D http.Get(\"https://gobyexample.com\")\u000A if err !\u003D nil {\u000A panic(err)\u000A }\u000A defer resp.Body.Close()\u000A');codeLines.push(' fmt.Println(\"Response status:\", resp.Status)\u000A');codeLines.push(' scanner :\u003D bufio.NewScanner(resp.Body)\u000A for i :\u003D 0; scanner.Scan() \u0026\u0026 i \u003C 5; i++ {\u000A fmt.Println(scanner.Text())\u000A }\u000A');codeLines.push(' if err :\u003D scanner.Err(); err !\u003D nil {\u000A panic(err)\u000A }\u000A}\u000A');codeLines.push('');
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</script>
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<script src="site.js" async></script>
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</body>
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</html>
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132
public/http-clients
generated
132
public/http-clients
generated
@ -23,136 +23,6 @@
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<div class="example" id="http-clients">
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<h2><a href="./">Go by Example</a>: HTTP Clients</h2>
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<table>
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<tr>
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<td class="docs">
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<p>The Go standard library comes with excellent support
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for HTTP clients and servers in the <code>net/http</code>
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package. In this example we’ll use it to issue simple
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HTTP requests.</p>
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</td>
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<td class="code leading">
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<a href="https://go.dev/play/p/vFW_el7oHMk"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
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<pre class="chroma">
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<span class="kn">package</span> <span class="nx">main</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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</td>
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<td class="code leading">
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<pre class="chroma"><span class="kn">import</span> <span class="p">(</span>
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<span class="s">"bufio"</span>
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<span class="s">"fmt"</span>
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<span class="s">"net/http"</span>
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<span class="p">)</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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</td>
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<td class="code leading">
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<pre class="chroma"><span class="kd">func</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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<p>Issue an HTTP GET request to a server. <code>http.Get</code> is a
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convenient shortcut around creating an <code>http.Client</code>
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object and calling its <code>Get</code> method; it uses the
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<code>http.DefaultClient</code> object which has useful default
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settings.</p>
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</td>
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<td class="code leading">
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<pre class="chroma">
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<span class="nx">resp</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">http</span><span class="p">.</span><span class="nf">Get</span><span class="p">(</span><span class="s">"https://gobyexample.com"</span><span class="p">)</span>
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<span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
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<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="k">defer</span> <span class="nx">resp</span><span class="p">.</span><span class="nx">Body</span><span class="p">.</span><span class="nf">Close</span><span class="p">()</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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<p>Print the HTTP response status.</p>
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</td>
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<td class="code leading">
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<pre class="chroma">
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<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="s">"Response status:"</span><span class="p">,</span> <span class="nx">resp</span><span class="p">.</span><span class="nx">Status</span><span class="p">)</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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<p>Print the first 5 lines of the response body.</p>
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</td>
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<td class="code leading">
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<pre class="chroma">
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<span class="nx">scanner</span> <span class="o">:=</span> <span class="nx">bufio</span><span class="p">.</span><span class="nf">NewScanner</span><span class="p">(</span><span class="nx">resp</span><span class="p">.</span><span class="nx">Body</span><span class="p">)</span>
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<span class="k">for</span> <span class="nx">i</span> <span class="o">:=</span> <span class="mi">0</span><span class="p">;</span> <span class="nx">scanner</span><span class="p">.</span><span class="nf">Scan</span><span class="p">()</span> <span class="o">&&</span> <span class="nx">i</span> <span class="p"><</span> <span class="mi">5</span><span class="p">;</span> <span class="nx">i</span><span class="o">++</span> <span class="p">{</span>
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<span class="nx">fmt</span><span class="p">.</span><span class="nf">Println</span><span class="p">(</span><span class="nx">scanner</span><span class="p">.</span><span class="nf">Text</span><span class="p">())</span>
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<span class="p">}</span>
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</pre>
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</td>
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</tr>
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<tr>
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<td class="docs">
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</td>
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<td class="code">
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<pre class="chroma"> <span class="k">if</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">scanner</span><span class="p">.</span><span class="nf">Err</span><span class="p">();</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span>
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<span class="nb">panic</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</pre>
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</td>
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</tr>
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</table>
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<table>
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<tr>
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<td class="docs">
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</td>
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<td class="code">
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<pre class="chroma"><span class="gp">$</span> go run http-clients.go
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<span class="go">Response status: 200 OK
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</span><span class="go"><!DOCTYPE html>
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</span><span class="go"><html>
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</span><span class="go"> <head>
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</span><span class="go"> <meta charset="utf-8">
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</span><span class="go"> <title>Go by Example</title></span></pre>
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</td>
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</tr>
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</table>
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<p class="next">
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Next example: <a href="http-servers">HTTP Servers</a>.
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@ -166,7 +36,7 @@ settings.</p>
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</div>
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<script>
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var codeLines = [];
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codeLines.push('package main\u000A');codeLines.push('import (\u000A \"bufio\"\u000A \"fmt\"\u000A \"net/http\"\u000A)\u000A');codeLines.push('func main() {\u000A');codeLines.push(' resp, err :\u003D http.Get(\"https://gobyexample.com\")\u000A if err !\u003D nil {\u000A panic(err)\u000A }\u000A defer resp.Body.Close()\u000A');codeLines.push(' fmt.Println(\"Response status:\", resp.Status)\u000A');codeLines.push(' scanner :\u003D bufio.NewScanner(resp.Body)\u000A for i :\u003D 0; scanner.Scan() \u0026\u0026 i \u003C 5; i++ {\u000A fmt.Println(scanner.Text())\u000A }\u000A');codeLines.push(' if err :\u003D scanner.Err(); err !\u003D nil {\u000A panic(err)\u000A }\u000A}\u000A');codeLines.push('');
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</script>
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<script src="site.js" async></script>
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</body>
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214
public/http-server
generated
Normal file
214
public/http-server
generated
Normal file
@ -0,0 +1,214 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Go by Example: HTTP Server</title>
|
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<link rel=stylesheet href="site.css">
|
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</head>
|
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<script>
|
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onkeydown = (e) => {
|
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|
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if (e.key == "ArrowLeft") {
|
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window.location.href = 'http-client';
|
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}
|
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|
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|
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if (e.key == "ArrowRight") {
|
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window.location.href = 'context';
|
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}
|
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|
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}
|
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</script>
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<body>
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<div class="example" id="http-server">
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<h2><a href="./">Go by Example</a>: HTTP Server</h2>
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<table>
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<tr>
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<td class="docs">
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<p>Writing a basic HTTP server is easy using the
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<code>net/http</code> package.</p>
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</td>
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<td class="code leading">
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<a href="https://go.dev/play/p/s3xMMt9Ytry"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
|
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<pre class="chroma">
|
||||
<span class="kn">package</span> <span class="nx">main</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma"><span class="kn">import</span> <span class="p">(</span>
|
||||
<span class="s">"fmt"</span>
|
||||
<span class="s">"net/http"</span>
|
||||
<span class="p">)</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>A fundamental concept in <code>net/http</code> servers is
|
||||
<em>handlers</em>. A handler is an object implementing the
|
||||
<code>http.Handler</code> interface. A common way to write
|
||||
a handler is by using the <code>http.HandlerFunc</code> adapter
|
||||
on functions with the appropriate signature.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="kd">func</span> <span class="nf">hello</span><span class="p">(</span><span class="nx">w</span> <span class="nx">http</span><span class="p">.</span><span class="nx">ResponseWriter</span><span class="p">,</span> <span class="nx">req</span> <span class="o">*</span><span class="nx">http</span><span class="p">.</span><span class="nx">Request</span><span class="p">)</span> <span class="p">{</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Functions serving as handlers take a
|
||||
<code>http.ResponseWriter</code> and a <code>http.Request</code> as
|
||||
arguments. The response writer is used to fill in the
|
||||
HTTP response. Here our simple response is just
|
||||
“hello\n”.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="nx">fmt</span><span class="p">.</span><span class="nf">Fprintf</span><span class="p">(</span><span class="nx">w</span><span class="p">,</span> <span class="s">"hello\n"</span><span class="p">)</span>
|
||||
<span class="p">}</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma"><span class="kd">func</span> <span class="nf">headers</span><span class="p">(</span><span class="nx">w</span> <span class="nx">http</span><span class="p">.</span><span class="nx">ResponseWriter</span><span class="p">,</span> <span class="nx">req</span> <span class="o">*</span><span class="nx">http</span><span class="p">.</span><span class="nx">Request</span><span class="p">)</span> <span class="p">{</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>This handler does something a little more
|
||||
sophisticated by reading all the HTTP request
|
||||
headers and echoing them into the response body.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="k">for</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">headers</span> <span class="o">:=</span> <span class="k">range</span> <span class="nx">req</span><span class="p">.</span><span class="nx">Header</span> <span class="p">{</span>
|
||||
<span class="k">for</span> <span class="nx">_</span><span class="p">,</span> <span class="nx">h</span> <span class="o">:=</span> <span class="k">range</span> <span class="nx">headers</span> <span class="p">{</span>
|
||||
<span class="nx">fmt</span><span class="p">.</span><span class="nf">Fprintf</span><span class="p">(</span><span class="nx">w</span><span class="p">,</span> <span class="s">"%v: %v\n"</span><span class="p">,</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">h</span><span class="p">)</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma"><span class="kd">func</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>We register our handlers on server routes using the
|
||||
<code>http.HandleFunc</code> convenience function. It sets up
|
||||
the <em>default router</em> in the <code>net/http</code> package and
|
||||
takes a function as an argument.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="nx">http</span><span class="p">.</span><span class="nf">HandleFunc</span><span class="p">(</span><span class="s">"/hello"</span><span class="p">,</span> <span class="nx">hello</span><span class="p">)</span>
|
||||
<span class="nx">http</span><span class="p">.</span><span class="nf">HandleFunc</span><span class="p">(</span><span class="s">"/headers"</span><span class="p">,</span> <span class="nx">headers</span><span class="p">)</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Finally, we call the <code>ListenAndServe</code> with the port
|
||||
and a handler. <code>nil</code> tells it to use the default
|
||||
router we’ve just set up.</p>
|
||||
|
||||
</td>
|
||||
<td class="code">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="nx">http</span><span class="p">.</span><span class="nf">ListenAndServe</span><span class="p">(</span><span class="s">":8090"</span><span class="p">,</span> <span class="kc">nil</span><span class="p">)</span>
|
||||
<span class="p">}</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</table>
|
||||
|
||||
<table>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Run the server in the background.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="gp">$</span> go run http-servers.go &</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Access the <code>/hello</code> route.</p>
|
||||
|
||||
</td>
|
||||
<td class="code">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="gp">$</span> curl localhost:8090/hello
|
||||
<span class="go">hello</span></pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</table>
|
||||
|
||||
|
||||
<p class="next">
|
||||
Next example: <a href="context">Context</a>.
|
||||
</p>
|
||||
|
||||
|
||||
<p class="footer">
|
||||
by <a href="https://markmcgranaghan.com">Mark McGranaghan</a> and <a href="https://eli.thegreenplace.net">Eli Bendersky</a> | <a href="https://github.com/mmcgrana/gobyexample">source</a> | <a href="https://github.com/mmcgrana/gobyexample#license">license</a>
|
||||
</p>
|
||||
|
||||
</div>
|
||||
<script>
|
||||
var codeLines = [];
|
||||
codeLines.push('package main\u000A');codeLines.push('import (\u000A \"fmt\"\u000A \"net/http\"\u000A)\u000A');codeLines.push('func hello(w http.ResponseWriter, req *http.Request) {\u000A');codeLines.push(' fmt.Fprintf(w, \"hello\\n\")\u000A}\u000A');codeLines.push('func headers(w http.ResponseWriter, req *http.Request) {\u000A');codeLines.push(' for name, headers :\u003D range req.Header {\u000A for _, h :\u003D range headers {\u000A fmt.Fprintf(w, \"%v: %v\\n\", name, h)\u000A }\u000A }\u000A}\u000A');codeLines.push('func main() {\u000A');codeLines.push(' http.HandleFunc(\"/hello\", hello)\u000A http.HandleFunc(\"/headers\", headers)\u000A');codeLines.push(' http.ListenAndServe(\":8090\", nil)\u000A}\u000A');codeLines.push('');codeLines.push('');
|
||||
</script>
|
||||
<script src="site.js" async></script>
|
||||
</body>
|
||||
</html>
|
||||
173
public/http-servers
generated
173
public/http-servers
generated
@ -23,177 +23,6 @@
|
||||
<div class="example" id="http-servers">
|
||||
<h2><a href="./">Go by Example</a>: HTTP Servers</h2>
|
||||
|
||||
<table>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Writing a basic HTTP server is easy using the
|
||||
<code>net/http</code> package.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
<a href="https://go.dev/play/p/s3xMMt9Ytry"><img title="Run code" src="play.png" class="run" /></a><img title="Copy code" src="clipboard.png" class="copy" />
|
||||
<pre class="chroma">
|
||||
<span class="kn">package</span> <span class="nx">main</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma"><span class="kn">import</span> <span class="p">(</span>
|
||||
<span class="s">"fmt"</span>
|
||||
<span class="s">"net/http"</span>
|
||||
<span class="p">)</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>A fundamental concept in <code>net/http</code> servers is
|
||||
<em>handlers</em>. A handler is an object implementing the
|
||||
<code>http.Handler</code> interface. A common way to write
|
||||
a handler is by using the <code>http.HandlerFunc</code> adapter
|
||||
on functions with the appropriate signature.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="kd">func</span> <span class="nf">hello</span><span class="p">(</span><span class="nx">w</span> <span class="nx">http</span><span class="p">.</span><span class="nx">ResponseWriter</span><span class="p">,</span> <span class="nx">req</span> <span class="o">*</span><span class="nx">http</span><span class="p">.</span><span class="nx">Request</span><span class="p">)</span> <span class="p">{</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Functions serving as handlers take a
|
||||
<code>http.ResponseWriter</code> and a <code>http.Request</code> as
|
||||
arguments. The response writer is used to fill in the
|
||||
HTTP response. Here our simple response is just
|
||||
“hello\n”.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="nx">fmt</span><span class="p">.</span><span class="nf">Fprintf</span><span class="p">(</span><span class="nx">w</span><span class="p">,</span> <span class="s">"hello\n"</span><span class="p">)</span>
|
||||
<span class="p">}</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma"><span class="kd">func</span> <span class="nf">headers</span><span class="p">(</span><span class="nx">w</span> <span class="nx">http</span><span class="p">.</span><span class="nx">ResponseWriter</span><span class="p">,</span> <span class="nx">req</span> <span class="o">*</span><span class="nx">http</span><span class="p">.</span><span class="nx">Request</span><span class="p">)</span> <span class="p">{</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>This handler does something a little more
|
||||
sophisticated by reading all the HTTP request
|
||||
headers and echoing them into the response body.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="k">for</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">headers</span> <span class="o">:=</span> <span class="k">range</span> <span class="nx">req</span><span class="p">.</span><span class="nx">Header</span> <span class="p">{</span>
|
||||
<span class="k">for</span> <span class="nx">_</span><span class="p">,</span> <span class="nx">h</span> <span class="o">:=</span> <span class="k">range</span> <span class="nx">headers</span> <span class="p">{</span>
|
||||
<span class="nx">fmt</span><span class="p">.</span><span class="nf">Fprintf</span><span class="p">(</span><span class="nx">w</span><span class="p">,</span> <span class="s">"%v: %v\n"</span><span class="p">,</span> <span class="nx">name</span><span class="p">,</span> <span class="nx">h</span><span class="p">)</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
<span class="p">}</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma"><span class="kd">func</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>We register our handlers on server routes using the
|
||||
<code>http.HandleFunc</code> convenience function. It sets up
|
||||
the <em>default router</em> in the <code>net/http</code> package and
|
||||
takes a function as an argument.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="nx">http</span><span class="p">.</span><span class="nf">HandleFunc</span><span class="p">(</span><span class="s">"/hello"</span><span class="p">,</span> <span class="nx">hello</span><span class="p">)</span>
|
||||
<span class="nx">http</span><span class="p">.</span><span class="nf">HandleFunc</span><span class="p">(</span><span class="s">"/headers"</span><span class="p">,</span> <span class="nx">headers</span><span class="p">)</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Finally, we call the <code>ListenAndServe</code> with the port
|
||||
and a handler. <code>nil</code> tells it to use the default
|
||||
router we’ve just set up.</p>
|
||||
|
||||
</td>
|
||||
<td class="code">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="nx">http</span><span class="p">.</span><span class="nf">ListenAndServe</span><span class="p">(</span><span class="s">":8090"</span><span class="p">,</span> <span class="kc">nil</span><span class="p">)</span>
|
||||
<span class="p">}</span>
|
||||
</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</table>
|
||||
|
||||
<table>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Run the server in the background.</p>
|
||||
|
||||
</td>
|
||||
<td class="code leading">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="gp">$</span> go run http-servers.go &</pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
<tr>
|
||||
<td class="docs">
|
||||
<p>Access the <code>/hello</code> route.</p>
|
||||
|
||||
</td>
|
||||
<td class="code">
|
||||
|
||||
<pre class="chroma">
|
||||
<span class="gp">$</span> curl localhost:8090/hello
|
||||
<span class="go">hello</span></pre>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
</table>
|
||||
|
||||
|
||||
<p class="next">
|
||||
Next example: <a href="context">Context</a>.
|
||||
@ -207,7 +36,7 @@ router we’ve just set up.</p>
|
||||
</div>
|
||||
<script>
|
||||
var codeLines = [];
|
||||
codeLines.push('package main\u000A');codeLines.push('import (\u000A \"fmt\"\u000A \"net/http\"\u000A)\u000A');codeLines.push('func hello(w http.ResponseWriter, req *http.Request) {\u000A');codeLines.push(' fmt.Fprintf(w, \"hello\\n\")\u000A}\u000A');codeLines.push('func headers(w http.ResponseWriter, req *http.Request) {\u000A');codeLines.push(' for name, headers :\u003D range req.Header {\u000A for _, h :\u003D range headers {\u000A fmt.Fprintf(w, \"%v: %v\\n\", name, h)\u000A }\u000A }\u000A}\u000A');codeLines.push('func main() {\u000A');codeLines.push(' http.HandleFunc(\"/hello\", hello)\u000A http.HandleFunc(\"/headers\", headers)\u000A');codeLines.push(' http.ListenAndServe(\":8090\", nil)\u000A}\u000A');codeLines.push('');codeLines.push('');
|
||||
|
||||
</script>
|
||||
<script src="site.js" async></script>
|
||||
</body>
|
||||
|
||||
4
public/index.html
generated
4
public/index.html
generated
@ -173,9 +173,9 @@
|
||||
|
||||
<li><a href="environment-variables">Environment Variables</a></li>
|
||||
|
||||
<li><a href="http-clients">HTTP Clients</a></li>
|
||||
<li><a href="http-client">HTTP Client</a></li>
|
||||
|
||||
<li><a href="http-servers">HTTP Servers</a></li>
|
||||
<li><a href="http-server">HTTP Server</a></li>
|
||||
|
||||
<li><a href="context">Context</a></li>
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user