golang基础-浏览器访问服务器、客户端访问服务器延迟处理、表单回写并提交

http初识-浏览器访问服务器

package main

import (
    "fmt"
    "net/http"
)

func Hello(w http.ResponseWriter,r *http.Request) {
    fmt.Println("handle hello")
    fmt.Fprintf(w,"hello ")
}

func login(w http.ResponseWriter,r *http.Request) {
    fmt.Println("handle login")
    fmt.Fprintf(w,"login ")
}

func main() {
    http.HandleFunc("/",Hello)
    http.HandleFunc("/user/login",login)
    err := http.ListenAndServe("0.0.0.0:8880",nil)
    if err != nil {
        fmt.Println("http listen Failed")
    }
}

然后在浏览器中输入

在go的终端的输出如下：

客户端访问服务器

package main

import (
    "fmt"
    "io/IoUtil"
    "net/http"
)

func main() {
    res,err := http.Get("https://www.baidu.com/")
    if err != nil {
        fmt.Println("get err:",err)
        return
    }

    data,err := IoUtil.ReadAll(res.Body)
    if err != nil {
        fmt.Println("get data err:",err)
        return
    }

    fmt.Println(string(data))
}

输出如下

PS E:\golang\go_pro\src\safly> go run httpClient.go
<html>
<head>
        <script> location.replace(location.href.replace("https://","http://")); </script>
</head>
<body>
        <noscript><Meta http-equiv="refresh" content="0;url=http://www.baidu.com/"></noscript>
</body>
</html>
PS E:\golang\go_pro\src\safly>

访问延迟处理

package main

import (
    "fmt"
    "net/http"
    "net"
    "time"
)

var url = []string{
    "http://www.baidu.com","http://google.com","http://taobao.com",}

func main() {

    for _,v := range url {
        //type Client struct{}
        c := http.Client{
            //type Transport struct {}
            Transport: &http.Transport {
                //Dial func(network,addr string) (net.Conn,error)
                Dial:func(network,addr string) (net.Conn,error){
                    timeout := time.Second*2
                    return net.DialTimeout(network,addr,timeout)
                },},}
        resp,err := c.Head(v)
        if err != nil {
            fmt.Printf("head %s Failed,err:%v\n",v,err)
            continue
        }

        fmt.Printf("head succ,status:%v\n",resp.Status)
    }
}

输出如下：

PS E:\golang\go_pro\src\safly> go run httpClient.go
head succ,status:200 OK
head http://google.com Failed,err:Head http://google.com: dial tcp 216.58.200.46:80: I/O timeout
head succ,status:200 OK
PS E:\golang\go_pro\src\safly>

回写form表单、并提交

package main

import (
    "io"
    // "log"
    "net/http"
)

const form = `<html><body><form action="#" method="post" name="bar">
                    <input type="text" name="in"/>
                    <input type="text" name="in"/>
                     <input type="submit" value="Submit"/>
             </form></body></html>`


func FormServer(w http.ResponseWriter,request *http.Request) {
    w.Header().Set("Content-Type","text/html")
    switch request.Method {
    case "GET":
        io.WriteString(w,form)
    case "POST":
        request.ParseForm()
        io.WriteString(w,request.Form["in"][1])
        io.WriteString(w,"\n")
        io.WriteString(w,request.FormValue("in"))
    }
}

/* func HandleFunc(pattern string,handler func(ResponseWriter,*Request)) { DefaultServeMux.HandleFunc(pattern,handler) } */
func main() {
    http.HandleFunc("/test2",FormServer)
    if err := http.ListenAndServe(":8088",nil); err != nil {
    }
}

点击submit输出页面为

golang基础-浏览器访问服务器、客户端访问服务器延迟处理、表单回写并提交

http初识-浏览器访问服务器

客户端访问服务器

访问延迟处理

回写form表单、并提交

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