上QQ阅读APP看书，第一时间看更新

How to do it…

In this recipe, we are going to create a file server that will serve static resources from the filesystem. Perform the following steps:

Create main.css inside a static/css directory, as follows:

$ mkdir static && cd static && mkdir css && cd css && touch main.css

Copy the following content to main.css:

body {color: #00008B}

Create serve-static-files.go, where we will create FileServer, which will serve resources from the static/css directory present on the filesystem for all URL patterns with /static, as follows:

package main
import 
(
  "fmt"
  "html/template"
  "log"
  "net/http"
)
const 
(
  CONN_HOST = "localhost"
  CONN_PORT = "8080"
)
type Person struct 
{
  Name string
  Age string
}
func renderTemplate(w http.ResponseWriter, r *http.Request) 
{
  person := Person{Id: "1", Name: "Foo"}
  parsedTemplate, _ := template.ParseFiles("templates/
  first-template.html")
  err := parsedTemplate.Execute(w, person)
  if err != nil 
  {
    log.Printf("Error occurred while executing the template 
    or writing its output : ", err)
    return
  }
}
func main() 
{
  fileServer := http.FileServer(http.Dir("static"))
  http.Handle("/static/", http.StripPrefix("/static/", fileServer))
  http.HandleFunc("/", renderTemplate)
  err := http.ListenAndServe(CONN_HOST+":"+CONN_PORT, nil)
  if err != nil 
  {
    log.Fatal("error starting http server : ", err)
    return
  }
}

Update first-template.html (created in our previous recipe) to include main.css from the static/css directory:

<html>
  <head>
    <meta charset="utf-8">
    <title>First Template</title>
    <link rel="stylesheet" href="/static/css/main.css">
  </head>
  <body>
    <h1>Hello {{.Name}}!</h1>
    Your Id is {{.Id}}
  </body>
</html>

With everything in place, the directory structure should look like the following:

Run the program with the following command:

$ go run serve-static-files.go