Go原生支持http。import("net/http") Go的http服务性能和nginx比较接近 几行代码就可以实现一个web服务
服务端http
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("127.0.0.1:8800", nil) if err != nil { fmt.Println("htpp listen failed") } }
http客户端
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)) }
http_head
package main import ( "fmt" "net/http" ) var url = []string{ "http://www.baidu.com", "http://google.com", "http://taobao.com", } func main() { for _, v := range url { res, err := http.Head(v) if err != nil { fmt.Printf("head %s failed,err:%v ", v, err) continue } fmt.Printf("head succ,status:%v ", res.Status) } }
http_head自定义超时写法
package main import ( "fmt" "net" "net/http" "time" ) var url = []string{ "http://www.baidu.com", "http://google.com", "http://taobao.com", } func main() { for _, v := range url { //超时写法 c := http.Client{ Transport: &http.Transport{ 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 ", v, err) continue } fmt.Printf("head succ,status:%v ", resp.Status) } }
http_form写法
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 SimpleServer(w http.ResponseWriter, request *http.Request) {
io.WriteString(w, "hello,world")
panic("test test")
}
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, " ")
io.WriteString(w, request.FormValue("in"))
}
}
func main() {
//用函数封装了一下
http.HandleFunc("/test1", logPanics(SimpleServer))
http.HandleFunc("/test2", logPanics(FormServer))
if err := http.ListenAndServe(":8088", nil); err != nil {
}
}
//捕获，错误处理
func logPanics(handle http.HandlerFunc) http.HandlerFunc {
return func(write http.ResponseWriter, request *http.Request) {
defer func() {
if x := recover(); x != nil {
log.Printf("[%v]caught panic:%v", request.RemoteAddr, x)
}
}()
handle(write, request) //这里才是
}
}
http_template，模板写法
package main import ( "fmt" "os" "text/template" ) type Person struct { Name string age string Title string } func main() { t, err := template.ParseFiles("d:/project/src/go_dev/day10/http_form/index.html") if err != nil { fmt.Println("parse file err:", err) return } p := Person{Name: "Mary", age: "31", Title: "我的个人网站"} if err := t.Execute(os.Stdout, p); err != nil { fmt.Println("There was an error:", err.Error()) } }
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>{{.Title}}</title> </head> <body> <p>hello,{{.Name}}</p> <p>{{.}}</p> </body> </html>
用例2：
package main import ( "fmt" "html/template" "io" "net/http" ) var myTemplate *template.Template type Result struct { output string } func (p *Result) Write(b []byte) (n int, err error) { fmt.Println("called by template") p.output += string(b) return len(b), nil } type Person struct { Name string Title string Age int } func userInfo(w http.ResponseWriter, r *http.Request) { fmt.Println("handle hello") //fmt.Fprintf(w,"hello") var arr []Person p := Person{Name: "Mary001", Age: 10, Title: "我的网站"} p1 := Person{Name: "Mary002", Age: 10, Title: "我的个人网站"} p2 := Person{Name: "Mary003", Age: 10, Title: "我的网站2"} arr = append(arr, p) arr = append(arr, p1) arr = append(arr, p2) resultWriter := &Result{} io.WriteString(resultWriter, "hello world") err := myTemplate.Execute(w, arr) if err != nil { fmt.Println(err) } fmt.Println("template render data:", resultWriter.output) //myTemplate.Execute(w, p) //myTemplate.Execute(os.Stdout, p) //file, err := os.OpenFile("C:/test.log", os.O_CREATE|os.O_WRONLY, 0755) //if err != nil { // fmt.Println("open failed err:", err) // return //} } func initTemplate(filename string) (err error) { myTemplate, err = template.ParseFiles(filename) if err != nil { fmt.Println("parse file err:", err) return } return } func main() { initTemplate("d:/project/src/go_dev/day10/template_http/index.html") http.HandleFunc("/user/info", userInfo) err := http.ListenAndServe("127.0.0.1:8880", nil) if err != nil { fmt.Println("http listen failed") } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> </head> <body> <p>hello world</p> <table border="1"> {{range .}} <tr> <td>{{.Name}}</td> <td>{{.Age}}</td><td>{{.Title}}</td> </tr> {{end}} </table> </body> </html>