Golang里实现Http服务器并解析header参数和表单参数
在http服务里,header参数和表单参数是经常使用到的,本文主要是练习在Go语言里,如何解析Http请求的header里的参数和表单参数,具体代码如下:
package server import ( "net/http" "strconv" "fmt" ) func HttpStart(port int) { http.HandleFunc("/hello", helloFunc) err := http.ListenAndServe(":"+strconv.Itoa(port), nil) if err != nil { fmt.Println("监听失败:",err.Error()) } } func helloFunc(w http.ResponseWriter, r *http.Request) { fmt.Println("打印Header参数列表:") if len(r.Header) > 0 { for k,v := range r.Header { fmt.Printf("%s=%s\n", k, v[0]) } } fmt.Println("打印Form参数列表:") r.ParseForm() if len(r.Form) > 0 { for k,v := range r.Form { fmt.Printf("%s=%s\n", k, v[0]) } } //验证用户名密码,如果成功则header里返回session,失败则返回StatusUnauthorized状态码 w.WriteHeader(http.StatusOK) if (r.Form.Get("user") == "admin") && (r.Form.Get("pass") == "888") { w.Write([]byte("hello,验证成功!")) } else { w.Write([]byte("hello,验证失败了!")) } }
运行后,在chrom浏览器里执行请求:http://127.0.0.1:8001/hello?user=admin&pass=888,服务端会打印参数列表如下:
打印Header参数列表: Accept-Language=zh-CN,zh;q=0.9 Connection=keep-alive Cache-Control=max-age=0 Upgrade-Insecure-Requests=1 User-Agent=Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.19 Safari/537.36 Accept=text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8 Accept-Encoding=gzip, deflate, br 打印Form参数列表: user=admin pass=888
并且会返回成功结果给客户端的,浏览器里运行结果为:
如果浏览器里不是请求/hello则会报404,如果参数写其他的也会返回验证失败的结果!