index.xml

<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
  <channel>
    <title>Go Web Examples</title>
    <link>https://gowebexamples.github.io/index.xml</link>
    <description>Recent content on Go Web Examples</description>
    <generator>Hugo -- gohugo.io</generator>
    <language>en-us</language>
    <atom:link href="https://gowebexamples.github.io/index.xml" rel="self" type="application/rss+xml" />
    
    <item>
      <title>Hello World</title>
      <link>https://gowebexamples.github.io/hello-world/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/hello-world/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-hello-world&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Hello World&lt;/h1&gt;

&lt;p&gt;This example will show how to start a webserver on port 8080 and print the classic &amp;ldquo;hello world&amp;rdquo; message.&lt;/p&gt;

&lt;p&gt;&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// hello-world.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		fmt.Fprintln(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;hello world&amp;quot;&lt;/span&gt;)
	})

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run hello-world.go

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/
&lt;span style=&#34;color: #888888&#34;&gt;hello world&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Routes</title>
      <link>https://gowebexamples.github.io/routes/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/routes/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-routes&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Routes&lt;/h1&gt;

&lt;p&gt;This example will show how to register a route and get the data using just the &lt;code&gt;net/http&lt;/code&gt; package.&lt;/p&gt;

&lt;p&gt;&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// routes.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	userAges &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;map&lt;/span&gt;[&lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;]&lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;int&lt;/span&gt;{
		&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Alice&amp;quot;&lt;/span&gt;:  &lt;span style=&#34;color: #009999&#34;&gt;25&lt;/span&gt;,
		&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Bob&amp;quot;&lt;/span&gt;:    &lt;span style=&#34;color: #009999&#34;&gt;30&lt;/span&gt;,
		&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Claire&amp;quot;&lt;/span&gt;: &lt;span style=&#34;color: #009999&#34;&gt;29&lt;/span&gt;,
	}

	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/users/&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		name &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; r.URL.Path[&lt;span style=&#34;color: #999999&#34;&gt;len&lt;/span&gt;(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/users/&amp;quot;&lt;/span&gt;):]
		age &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; userAges[name]

		fmt.Fprintf(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;%s is %d years old!&amp;quot;&lt;/span&gt;, name, age)
	})

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run routes.go

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/users/Bob
&lt;span style=&#34;color: #888888&#34;&gt;Bob is 30 years old!&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Routes (using gorilla/mux)</title>
      <link>https://gowebexamples.github.io/routes-using-gorilla-mux/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/routes-using-gorilla-mux/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-routes-using-gorilla-mux&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Routes (using gorilla/mux)&lt;/h1&gt;

&lt;p&gt;This example will show how to register routes using the popular &lt;a target=&#34;_blank&#34; href=&#34;https://github.com/gorilla/mux&#34;&gt;gorilla/mux&lt;/a&gt; router.
It is compatible with the router from the standard &lt;code&gt;net/http&lt;/code&gt; package but adds a few extra features like named url parameters and http method restrictions to remove some boilerplate code.&lt;/p&gt;

&lt;p&gt;To use the library we will have to install it first like so:&lt;/p&gt;

&lt;p&gt;&lt;code&gt;$ go get github.com/gorilla/mux&lt;/code&gt;&lt;/p&gt;

&lt;p&gt;From now on, every application we write will be able to make use of this library.&lt;/p&gt;

&lt;p&gt;&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// routes.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;

	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;github.com/gorilla/mux&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	userAges &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;map&lt;/span&gt;[&lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;]&lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;int&lt;/span&gt;{
		&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Alice&amp;quot;&lt;/span&gt;:  &lt;span style=&#34;color: #009999&#34;&gt;25&lt;/span&gt;,
		&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Bob&amp;quot;&lt;/span&gt;:    &lt;span style=&#34;color: #009999&#34;&gt;30&lt;/span&gt;,
		&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Claire&amp;quot;&lt;/span&gt;: &lt;span style=&#34;color: #009999&#34;&gt;29&lt;/span&gt;,
	}

	r &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; mux.NewRouter()
	r.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/users/{name}&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		vars &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; mux.Vars(r)
		name &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; vars[&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;name&amp;quot;&lt;/span&gt;]
		age &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; userAges[name]

		fmt.Fprintf(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;%s is %d years old!&amp;quot;&lt;/span&gt;, name, age)
	}).Methods(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;GET&amp;quot;&lt;/span&gt;)

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, r)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run routes.go

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/users/Bob
&lt;span style=&#34;color: #888888&#34;&gt;Bob is 30 years old!&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Templates</title>
      <link>https://gowebexamples.github.io/templates/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/templates/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-templates&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Templates&lt;/h1&gt;

&lt;p&gt;This example will show how to render a simple list of TODO items into an html page using the &lt;code&gt;html/template&lt;/code&gt; package.&lt;/p&gt;

&lt;p&gt;&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// todos.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;html/template&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;type&lt;/span&gt; Todo &lt;span style=&#34;font-weight: bold&#34;&gt;struct&lt;/span&gt; {
	Task &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;
	Done &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;bool&lt;/span&gt;
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	tmpl &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; template.Must(template.ParseFiles(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;todos.html&amp;quot;&lt;/span&gt;))
	todos &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; []Todo{
		{&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Learn Go&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;true&lt;/span&gt;},
		{&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Read Go Web Examples&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;true&lt;/span&gt;},
		{&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Create a web app in Go&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;false&lt;/span&gt;},
	}

	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		tmpl.Execute(w, &lt;span style=&#34;font-weight: bold&#34;&gt;struct&lt;/span&gt;{ Todos []Todo }{todos})
	})

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;&amp;lt;!-- todos.html --&amp;gt;&lt;/span&gt;
&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;h1&lt;/span&gt;&amp;gt;Todos&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;h1&lt;/span&gt;&amp;gt;
&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;ul&lt;/span&gt;&amp;gt;
	{{range .Todos}}
		{{if .Done}}
			&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;li&lt;/span&gt;&amp;gt;&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;s&lt;/span&gt;&amp;gt;{{.Task}}&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;s&lt;/span&gt;&amp;gt;&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;li&lt;/span&gt;&amp;gt;
		{{else}}
			&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;li&lt;/span&gt;&amp;gt;{{.Task}}&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;li&lt;/span&gt;&amp;gt;
		{{end}}
	{{end}}
&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;ul&lt;/span&gt;&amp;gt;
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run todos.go
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;demo&#34;&gt;
    &lt;h1&gt;Todos&lt;/h1&gt;
    &lt;ul&gt;
        &lt;li&gt;&lt;s&gt;Learn Go&lt;/s&gt;&lt;/li&gt;
        &lt;li&gt;&lt;s&gt;Read Go Web Examples&lt;/s&gt;&lt;/li&gt;
        &lt;li&gt;Create a web app in Go&lt;/li&gt;
    &lt;/ul&gt;
&lt;/div&gt;&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Forms</title>
      <link>https://gowebexamples.github.io/forms/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/forms/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-forms&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Forms&lt;/h1&gt;

&lt;p&gt;This example will show how to simulate a contact form and parse the message into a struct.&lt;/p&gt;

&lt;p&gt;&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// forms.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;html/template&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;type&lt;/span&gt; ContactDetails &lt;span style=&#34;font-weight: bold&#34;&gt;struct&lt;/span&gt; {
	Email   &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;
	Subject &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;
	Message &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	tmpl &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; template.Must(template.ParseFiles(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;forms.html&amp;quot;&lt;/span&gt;))

	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		&lt;span style=&#34;font-weight: bold&#34;&gt;if&lt;/span&gt; r.Method &lt;span style=&#34;font-weight: bold&#34;&gt;!=&lt;/span&gt; http.MethodPost {
			tmpl.Execute(w, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
			&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt;
		}

		details &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; ContactDetails{
			Email:   r.FormValue(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;email&amp;quot;&lt;/span&gt;),
			Subject: r.FormValue(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;subject&amp;quot;&lt;/span&gt;),
			Message: r.FormValue(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;message&amp;quot;&lt;/span&gt;),
		}

		&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// do something with details&lt;/span&gt;
		_ = details

		tmpl.Execute(w, &lt;span style=&#34;font-weight: bold&#34;&gt;struct&lt;/span&gt;{ Success &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;bool&lt;/span&gt; }{&lt;span style=&#34;font-weight: bold&#34;&gt;true&lt;/span&gt;})
	})

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;&amp;lt;!-- forms.html --&amp;gt;&lt;/span&gt;
{{if .Success}}
	&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;h1&lt;/span&gt;&amp;gt;Thanks for your message!&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;h1&lt;/span&gt;&amp;gt;
{{else}}
	&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;h1&lt;/span&gt;&amp;gt;Contact&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;h1&lt;/span&gt;&amp;gt;
	&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;form&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;method&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;POST&amp;quot;&lt;/span&gt;&amp;gt;
		&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;label&lt;/span&gt;&amp;gt;Email:&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;label&lt;/span&gt;&amp;gt;&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;br&lt;/span&gt; /&amp;gt;
		&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;input&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;type&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;text&amp;quot;&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;email&amp;quot;&lt;/span&gt;&amp;gt;&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;br&lt;/span&gt; /&amp;gt;
		&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;label&lt;/span&gt;&amp;gt;Subject:&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;label&lt;/span&gt;&amp;gt;&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;br&lt;/span&gt; /&amp;gt;
		&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;input&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;type&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;text&amp;quot;&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;subject&amp;quot;&lt;/span&gt;&amp;gt;&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;br&lt;/span&gt; /&amp;gt;
		&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;label&lt;/span&gt;&amp;gt;Message:&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;label&lt;/span&gt;&amp;gt;&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;br&lt;/span&gt; /&amp;gt;
		&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;textarea&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;message&amp;quot;&lt;/span&gt;&amp;gt;&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;textarea&lt;/span&gt;&amp;gt;&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;br&lt;/span&gt; /&amp;gt;
		&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;input&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;type&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;submit&amp;quot;&lt;/span&gt;&amp;gt;
	&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;form&lt;/span&gt;&amp;gt;
{{end}}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run forms.go
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;demo&#34;&gt;
    &lt;h1&gt;Contact&lt;/h1&gt;
    &lt;form method=&#34;POST&#34;&gt;
        &lt;label&gt;Email:&lt;/label&gt;&lt;br /&gt;
        &lt;input type=&#34;text&#34; name=&#34;email&#34;&gt;&lt;br /&gt;
        &lt;label&gt;Subject:&lt;/label&gt;&lt;br /&gt;
        &lt;input type=&#34;text&#34; name=&#34;subject&#34;&gt;&lt;br /&gt;
        &lt;label&gt;Message:&lt;/label&gt;&lt;br /&gt;
        &lt;textarea name=&#34;message&#34;&gt;&lt;/textarea&gt;&lt;br /&gt;
        &lt;input type=&#34;submit&#34;&gt;
    &lt;/form&gt;
&lt;/div&gt;&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>JSON</title>
      <link>https://gowebexamples.github.io/json/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/json/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-json&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; JSON&lt;/h1&gt;

&lt;p&gt;This example will show how to encode and decode JSON data using the &lt;code&gt;encoding/json&lt;/code&gt; package.
&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// json.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;encoding/json&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;type&lt;/span&gt; User &lt;span style=&#34;font-weight: bold&#34;&gt;struct&lt;/span&gt; {
	Firstname &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;`json:&amp;quot;firstname&amp;quot;`&lt;/span&gt;
	Lastname  &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;`json:&amp;quot;lastname&amp;quot;`&lt;/span&gt;
	Age       &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;int&lt;/span&gt;    &lt;span style=&#34;color: #bb8844&#34;&gt;`json:&amp;quot;age&amp;quot;`&lt;/span&gt;
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/decode&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		&lt;span style=&#34;font-weight: bold&#34;&gt;var&lt;/span&gt; user User
		json.NewDecoder(r.Body).Decode(&lt;span style=&#34;font-weight: bold&#34;&gt;&amp;amp;&lt;/span&gt;user)

		fmt.Fprintf(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;%s %s is %d years old!&amp;quot;&lt;/span&gt;, user.Firstname, user.Lastname, user.Age)
	})

	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/encode&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		peter &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; User{
			Firstname: &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;John&amp;quot;&lt;/span&gt;,
			Lastname:  &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Doe&amp;quot;&lt;/span&gt;,
			Age:       &lt;span style=&#34;color: #009999&#34;&gt;25&lt;/span&gt;,
		}

		json.NewEncoder(w).Encode(peter)
	})

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run json.go

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s -XPOST -d&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;#39;{&amp;quot;firstname&amp;quot;:&amp;quot;Donald&amp;quot;,&amp;quot;lastname&amp;quot;:&amp;quot;Trump&amp;quot;,&amp;quot;age&amp;quot;:70}&amp;#39;&lt;/span&gt; http://localhost:8080/decode
&lt;span style=&#34;color: #888888&#34;&gt;Donald Trump is 70 years old!&lt;/span&gt;

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/encode
&lt;span style=&#34;color: #888888&#34;&gt;{&amp;quot;firstname&amp;quot;:&amp;quot;John&amp;quot;,&amp;quot;lastname&amp;quot;:&amp;quot;Doe&amp;quot;,&amp;quot;age&amp;quot;:25}&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Static Files</title>
      <link>https://gowebexamples.github.io/static-files/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/static-files/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-static-files&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Static Files&lt;/h1&gt;

&lt;p&gt;This example will show how to serve static files like CSSs, JavaScripts or images from a specific directory.&lt;/p&gt;

&lt;p&gt;&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// static-files.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	fs &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; http.FileServer(http.Dir(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;assets/&amp;quot;&lt;/span&gt;))
	http.Handle(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/static/&amp;quot;&lt;/span&gt;, http.StripPrefix(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/static/&amp;quot;&lt;/span&gt;, fs))

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; tree assets/
&lt;span style=&#34;color: #888888&#34;&gt;assets/&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;└── css&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;    └── styles.css&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run static-files.go

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/static/css/styles.css
&lt;span style=&#34;color: #888888&#34;&gt;body {&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;    background-color: black;&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;}&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Sessions</title>
      <link>https://gowebexamples.github.io/sessions/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/sessions/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-sessions&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Sessions&lt;/h1&gt;

&lt;p&gt;This example will show how to store data in session cookies using the popular  &lt;a target=&#34;_blank&#34; href=&#34;https://github.com/gorilla/sessions&#34;&gt;gorilla/sessions&lt;/a&gt; package in Go.&lt;/p&gt;

&lt;p&gt;Cookies are small pieces of data stored in the browser of a user and are sent to our server on each request. In them, we can store e.g. whether or not a user is logged in into our website and figure out who he actually is (in our system).&lt;/p&gt;

&lt;p&gt;In this example we will only allow authenticated users to view our secret message on the &lt;code&gt;/secret&lt;/code&gt; page. To get access to it, the will first have to visit &lt;code&gt;/login&lt;/code&gt; to get a valid session cookie, which logs him in. Additionally he can visit &lt;code&gt;/logout&lt;/code&gt; to revoke his access to our secret message.
&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// sessions.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;

	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;github.com/gorilla/sessions&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;var&lt;/span&gt; (
	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// key must be 16, 24 or 32 bytes long (AES-128, AES-192 or AES-256)&lt;/span&gt;
	key = []&lt;span style=&#34;color: #999999&#34;&gt;byte&lt;/span&gt;(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;super-secret-key&amp;quot;&lt;/span&gt;)
	store = sessions.NewCookieStore(key)
)

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; secret(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
	session, _ &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; store.Get(r, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;cookie-name&amp;quot;&lt;/span&gt;)

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Check if user is authenticated&lt;/span&gt;
	&lt;span style=&#34;font-weight: bold&#34;&gt;if&lt;/span&gt; auth, ok &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; session.Values[&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;authenticated&amp;quot;&lt;/span&gt;].(&lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;bool&lt;/span&gt;); !ok &lt;span style=&#34;font-weight: bold&#34;&gt;||&lt;/span&gt; !auth {
		http.Error(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Forbidden&amp;quot;&lt;/span&gt;, http.StatusForbidden)
		&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt;
	}

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Print secret message&lt;/span&gt;
	fmt.Fprintln(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;The cake is a lie!&amp;quot;&lt;/span&gt;)
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; login(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
	session, _ &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; store.Get(r, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;cookie-name&amp;quot;&lt;/span&gt;)

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Authentication goes here&lt;/span&gt;
	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// ...&lt;/span&gt;

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Set user as authenticated&lt;/span&gt;
	session.Values[&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;authenticated&amp;quot;&lt;/span&gt;] = &lt;span style=&#34;font-weight: bold&#34;&gt;true&lt;/span&gt;
	session.Save(r, w)
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; logout(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
	session, _ &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; store.Get(r, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;cookie-name&amp;quot;&lt;/span&gt;)

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Revoke users authentication&lt;/span&gt;
	session.Values[&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;authenticated&amp;quot;&lt;/span&gt;] = &lt;span style=&#34;font-weight: bold&#34;&gt;false&lt;/span&gt;
	session.Save(r, w)
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/secret&amp;quot;&lt;/span&gt;, secret)
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/login&amp;quot;&lt;/span&gt;, login)
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/logout&amp;quot;&lt;/span&gt;, logout)

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run sessions.go

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/secret
&lt;span style=&#34;color: #888888&#34;&gt;Forbidden&lt;/span&gt;

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s -I http://localhost:8080/login
&lt;span style=&#34;color: #888888&#34;&gt;Set-Cookie: cookie-name=MTQ4NzE5Mz...&lt;/span&gt;

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s --cookie &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;cookie-name=MTQ4NzE5Mz...&amp;quot;&lt;/span&gt; http://localhost:8080/secret
&lt;span style=&#34;color: #888888&#34;&gt;The cake is a lie!&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Password Hashing</title>
      <link>https://gowebexamples.github.io/password-hashing/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/password-hashing/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-password-hashing&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Password Hashing&lt;/h1&gt;

&lt;p&gt;This example will show how to hash passwords using bcrypt.
For this we have to &lt;code&gt;go get&lt;/code&gt; the golang bcrypt library like so:&lt;/p&gt;

&lt;p&gt;&lt;code&gt;$ go get golang.org/x/crypto/bcrypt&lt;/code&gt;&lt;/p&gt;

&lt;p&gt;From now on, every application we write will be able to make use of this library.
&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// passwords.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;

	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;golang.org/x/crypto/bcrypt&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; HashPassword(password &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;) (&lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;, &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;error&lt;/span&gt;) {
	bytes, err &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; bcrypt.GenerateFromPassword([]&lt;span style=&#34;color: #999999&#34;&gt;byte&lt;/span&gt;(password), &lt;span style=&#34;color: #009999&#34;&gt;14&lt;/span&gt;)
	&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; &lt;span style=&#34;color: #999999&#34;&gt;string&lt;/span&gt;(bytes), err
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; CheckPasswordHash(password, hash &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;) &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;bool&lt;/span&gt; {
	err &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; bcrypt.CompareHashAndPassword([]&lt;span style=&#34;color: #999999&#34;&gt;byte&lt;/span&gt;(hash), []&lt;span style=&#34;color: #999999&#34;&gt;byte&lt;/span&gt;(password))
	&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; err &lt;span style=&#34;font-weight: bold&#34;&gt;==&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	password &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;secret&amp;quot;&lt;/span&gt;
	hash, _ &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; HashPassword(password) &lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// ignore error for the sake of simplicity&lt;/span&gt;

	fmt.Println(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Password:&amp;quot;&lt;/span&gt;, password)
	fmt.Println(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Hash:    &amp;quot;&lt;/span&gt;, hash)

	match &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; CheckPasswordHash(password, hash)
	fmt.Println(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Match:   &amp;quot;&lt;/span&gt;, match)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run passwords.go
&lt;span style=&#34;color: #888888&#34;&gt;Password: secret&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;Hash:     $2a$14$ajq8Q7fbtFRQvXpdCq7Jcuy.Rx1h/L4J60Otx.gyNLbAYctGMJ9tK&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;Match:    true&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Websockets</title>
      <link>https://gowebexamples.github.io/websockets/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/websockets/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-websockets&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Websockets&lt;/h1&gt;

&lt;p&gt;This example will show how to work with websockets in Go. We will build a simple server which echoes back everything we send to it.
For this we have to &lt;code&gt;go get&lt;/code&gt; the popular &lt;a target=&#34;_blank&#34; href=&#34;https://github.com/gorilla/websocket&#34;&gt;gorilla/websocket&lt;/a&gt; library like so:&lt;/p&gt;

&lt;p&gt;&lt;code&gt;$ go get github.com/gorilla/websocket&lt;/code&gt;&lt;/p&gt;

&lt;p&gt;From now on, every application we write will be able to make use of this library.
&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// websockets.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;

	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;github.com/gorilla/websocket&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;var&lt;/span&gt; upgrader = websocket.Upgrader{
	ReadBufferSize:  &lt;span style=&#34;color: #009999&#34;&gt;1024&lt;/span&gt;,
	WriteBufferSize: &lt;span style=&#34;color: #009999&#34;&gt;1024&lt;/span&gt;,
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/echo&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		conn, _ &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; upgrader.Upgrade(w, r, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;) &lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// error ignored for sake of simplicity&lt;/span&gt;

		&lt;span style=&#34;font-weight: bold&#34;&gt;for&lt;/span&gt; {
			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Read message from browser&lt;/span&gt;
			msgType, msg, err &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; conn.ReadMessage()
			&lt;span style=&#34;font-weight: bold&#34;&gt;if&lt;/span&gt; err &lt;span style=&#34;font-weight: bold&#34;&gt;!=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt; {
				&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt;
			}

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Print the message to the console&lt;/span&gt;
			fmt.Printf(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;%s sent: %s\n&amp;quot;&lt;/span&gt;, conn.RemoteAddr(), &lt;span style=&#34;color: #999999&#34;&gt;string&lt;/span&gt;(msg))

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Write message back to browser&lt;/span&gt;
			&lt;span style=&#34;font-weight: bold&#34;&gt;if&lt;/span&gt; err = conn.WriteMessage(msgType, msg); err &lt;span style=&#34;font-weight: bold&#34;&gt;!=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt; {
				&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt;
			}
		}
	})

	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		http.ServeFile(w, r, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;websockets.html&amp;quot;&lt;/span&gt;)
	})

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;&amp;lt;!-- websockets.html --&amp;gt;&lt;/span&gt;
&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;input&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;id&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;input&amp;quot;&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;type&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;text&amp;quot;&lt;/span&gt; /&amp;gt;
&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;button&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;onclick&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;send()&amp;quot;&lt;/span&gt;&amp;gt;Send&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;button&lt;/span&gt;&amp;gt;
&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;pre&lt;/span&gt; &lt;span style=&#34;color: #008080&#34;&gt;id&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;output&amp;quot;&lt;/span&gt;&amp;gt;&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;pre&lt;/span&gt;&amp;gt;
&amp;lt;&lt;span style=&#34;color: #000080&#34;&gt;script&lt;/span&gt;&amp;gt;
	&lt;span style=&#34;font-weight: bold&#34;&gt;var&lt;/span&gt; input &lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;color: #999999&#34;&gt;document&lt;/span&gt;.getElementById(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;input&amp;quot;&lt;/span&gt;);
	&lt;span style=&#34;font-weight: bold&#34;&gt;var&lt;/span&gt; output &lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;color: #999999&#34;&gt;document&lt;/span&gt;.getElementById(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;output&amp;quot;&lt;/span&gt;);
	&lt;span style=&#34;font-weight: bold&#34;&gt;var&lt;/span&gt; socket &lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;new&lt;/span&gt; WebSocket(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;ws://localhost:8080/echo&amp;quot;&lt;/span&gt;);

	socket.onopen &lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;function&lt;/span&gt; () {
		output.innerHTML &lt;span style=&#34;font-weight: bold&#34;&gt;+=&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Status: Connected\n&amp;quot;&lt;/span&gt;;
	};

	socket.onmessage &lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;function&lt;/span&gt; (e) {
		output.innerHTML &lt;span style=&#34;font-weight: bold&#34;&gt;+=&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;Server: &amp;quot;&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;+&lt;/span&gt; e.data &lt;span style=&#34;font-weight: bold&#34;&gt;+&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;\n&amp;quot;&lt;/span&gt;;
	};

	&lt;span style=&#34;font-weight: bold&#34;&gt;function&lt;/span&gt; send() {
		socket.send(input.value);
		input.value &lt;span style=&#34;font-weight: bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;&amp;quot;&lt;/span&gt;;
	}
&amp;lt;/&lt;span style=&#34;color: #000080&#34;&gt;script&lt;/span&gt;&amp;gt;
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run websockets.go
&lt;span style=&#34;color: #888888&#34;&gt;[127.0.0.1]:53403 sent: Hello Go Web Examples, you&amp;#39;re doing great!&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;demo&#34;&gt;
    &lt;input type=&#34;text&#34;&gt;
    &lt;button&gt;Send&lt;/button&gt;
    &lt;pre&gt;Status: Connected
Server: Hello Go Web Examples, you&amp;rsquo;re doing great!&lt;/pre&gt;
&lt;/div&gt;&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Middleware (Basic)</title>
      <link>https://gowebexamples.github.io/basic-middleware/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/basic-middleware/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-middleware-basic&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Middleware (Basic)&lt;/h1&gt;

&lt;p&gt;This example will show how to create basic logging middleware in Go.&lt;/p&gt;

&lt;p&gt;A middleware simply takes a &lt;code&gt;http.HandlerFunc&lt;/code&gt; as one of its parameters, wraps it and returns a new &lt;code&gt;http.HandlerFunc&lt;/code&gt; for the server to call.&lt;/p&gt;

&lt;p&gt;&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// basic-middleware.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;log&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; logging(f http.HandlerFunc) http.HandlerFunc {
	&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
		log.Println(r.URL.Path)
		f(w, r)
	}
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; foo(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
	fmt.Fprintln(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;foo&amp;quot;&lt;/span&gt;)
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; bar(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
	fmt.Fprintln(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;bar&amp;quot;&lt;/span&gt;)
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/foo&amp;quot;&lt;/span&gt;, logging(foo))
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/bar&amp;quot;&lt;/span&gt;, logging(bar))

	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run basic-middleware.go
&lt;span style=&#34;color: #888888&#34;&gt;2017/02/10 23:59:34 /foo&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;2017/02/10 23:59:35 /bar&lt;/span&gt;
&lt;span style=&#34;color: #888888&#34;&gt;2017/02/10 23:59:36 /foo?bar&lt;/span&gt;

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/foo
&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/bar
&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/foo?bar
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
    </item>
    
    <item>
      <title>Middleware (Advanced)</title>
      <link>https://gowebexamples.github.io/advanced-middleware/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://gowebexamples.github.io/advanced-middleware/</guid>
      <description>

&lt;h1 id=&#34;go-web-examples-middleware-advanced&#34;&gt;&lt;a href=&#34;https://gowebexamples.github.io/&#34;&gt;Go Web Examples:&lt;/a&gt; Middleware (Advanced)&lt;/h1&gt;

&lt;p&gt;This example will show how to create a more advanced version of middleware in Go.&lt;/p&gt;

&lt;p&gt;A middleware in itself simply takes a &lt;code&gt;http.HandlerFunc&lt;/code&gt; as one of its parameters, wraps it and returns a new &lt;code&gt;http.HandlerFunc&lt;/code&gt; for the server to call.&lt;/p&gt;

&lt;p&gt;Here we define a new type &lt;code&gt;Middleware&lt;/code&gt; which makes it eventually easier to chain multiple middlewares together. This idea is inspired by Mat Ryers&amp;rsquo; talk about Building APIs.
You can find a more detailed explaination including the talk &lt;a target=&#34;_blank&#34; href=&#34;https://medium.com/@matryer/writing-middleware-in-golang-and-how-go-makes-it-so-much-fun-4375c1246e81&#34;&gt;here&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;&lt;br /&gt;
This snippet explains in detail how a new middleware is created. In the full example below, we reduce this version by some boilerplate code.
&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; createNewMiddleware() Middleware {

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Create a new Middleware&lt;/span&gt;
	middleware &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(next http.HandlerFunc) http.HandlerFunc {

		&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Define the http.HandlerFunc which is called by the server eventually&lt;/span&gt;
		handler &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// ... do middleware things&lt;/span&gt;

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Call the next middleware/handler in chain&lt;/span&gt;
			next(w, r)
		}

		&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Return newly created handler&lt;/span&gt;
		&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; handler
	}

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Return newly created middleware&lt;/span&gt;
	&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; middleware
}
&lt;/pre&gt;&lt;/div&gt;

&lt;br /&gt;
This is the full example:
&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// advanced-middleware.go&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;package&lt;/span&gt; main

&lt;span style=&#34;font-weight: bold&#34;&gt;import&lt;/span&gt; (
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;fmt&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;log&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;net/http&amp;quot;&lt;/span&gt;
	&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;time&amp;quot;&lt;/span&gt;
)

&lt;span style=&#34;font-weight: bold&#34;&gt;type&lt;/span&gt; Middleware &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(http.HandlerFunc) http.HandlerFunc

&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Logging logs all requests with its path and the time it took to process&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; Logging() Middleware {

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Create a new Middleware&lt;/span&gt;
	&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(f http.HandlerFunc) http.HandlerFunc {

		&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Define the http.HandlerFunc&lt;/span&gt;
		&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Do middleware things&lt;/span&gt;
			start &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; time.Now()
			&lt;span style=&#34;font-weight: bold&#34;&gt;defer&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;() { log.Println(r.URL.Path, time.Since(start)) }()

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Call the next middleware/handler in chain&lt;/span&gt;
			f(w, r)
		}
	}
}

&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Method ensures that url can only be requested with a specific method, else returns a 400 Bad Request&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; Method(m &lt;span style=&#34;color: #445588; font-weight: bold&#34;&gt;string&lt;/span&gt;) Middleware {

	&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Create a new Middleware&lt;/span&gt;
	&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(f http.HandlerFunc) http.HandlerFunc {

		&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Define the http.HandlerFunc&lt;/span&gt;
		&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt;(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Do middleware things&lt;/span&gt;
			&lt;span style=&#34;font-weight: bold&#34;&gt;if&lt;/span&gt; r.Method &lt;span style=&#34;font-weight: bold&#34;&gt;!=&lt;/span&gt; m {
				http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
				&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt;
			}

			&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Call the next middleware/handler in chain&lt;/span&gt;
			f(w, r)
		}
	}
}

&lt;span style=&#34;color: #999988; font-style: italic&#34;&gt;// Chain applies middlewares to a http.HandlerFunc&lt;/span&gt;
&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; Chain(f http.HandlerFunc, middlewares &lt;span style=&#34;font-weight: bold&#34;&gt;...&lt;/span&gt;Middleware) http.HandlerFunc {
	&lt;span style=&#34;font-weight: bold&#34;&gt;for&lt;/span&gt; _, m &lt;span style=&#34;font-weight: bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;font-weight: bold&#34;&gt;range&lt;/span&gt; middlewares {
		f = m(f)
	}
	&lt;span style=&#34;font-weight: bold&#34;&gt;return&lt;/span&gt; f
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; Hello(w http.ResponseWriter, r &lt;span style=&#34;font-weight: bold&#34;&gt;*&lt;/span&gt;http.Request) {
	fmt.Fprintln(w, &lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;hello world&amp;quot;&lt;/span&gt;)
}

&lt;span style=&#34;font-weight: bold&#34;&gt;func&lt;/span&gt; main() {
	http.HandleFunc(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;/&amp;quot;&lt;/span&gt;, Chain(Hello, Method(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;GET&amp;quot;&lt;/span&gt;), Logging()))
	http.ListenAndServe(&lt;span style=&#34;color: #bb8844&#34;&gt;&amp;quot;:8080&amp;quot;&lt;/span&gt;, &lt;span style=&#34;font-weight: bold&#34;&gt;nil&lt;/span&gt;)
}
&lt;/pre&gt;&lt;/div&gt;

&lt;div class=&#34;highlight&#34; style=&#34;background: #ffffff&#34;&gt;&lt;pre style=&#34;line-height: 125%&#34;&gt;&lt;span&gt;&lt;/span&gt;&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; go run advanced-middleware.go
&lt;span style=&#34;color: #888888&#34;&gt;2017/02/11 00:34:53 / 0s&lt;/span&gt;

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s http://localhost:8080/
&lt;span style=&#34;color: #888888&#34;&gt;hello world&lt;/span&gt;

&lt;span style=&#34;color: #555555&#34;&gt;$&lt;/span&gt; curl -s -XPOST http://localhost:8080/
&lt;span style=&#34;color: #888888&#34;&gt;Bad Request&lt;/span&gt;
&lt;/pre&gt;&lt;/div&gt;
&lt;/p&gt;
</description>
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