第15章 15.5-健壮的http应用
2020-01-25 本文已影响0人
yezide
package main
import (
"io"
"log"
"net/http"
)
const form = `<html><body><form action="#" method="post" name="bar">
<input type="text" name="in"/>
<input type="submit" value="Submit"/>
</form></html></body>`
type MyHandleFunc func(http.ResponseWriter, *http.Request)
// 最简单的输出html
func SimpleServer(w http.ResponseWriter, req *http.Request) {
io.WriteString(w, "<h1>hello go</h1>")
}
// 首先是GET方式，显示html表单
// 点submit之后变成了post
// 然后读取form的in字段，就是input框的值显示出来
func FormServer(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Content-type", "text/html")
switch req.Method {
case "GET":
io.WriteString(w, form)
case "POST":
io.WriteString(w, req.FormValue("in"))
}
}
func LogPanic(f MyHandleFunc) MyHandleFunc {
return func(w http.ResponseWriter, req *http.Request) {
defer func() {
if x := recover(); x != nil {
log.Printf("[%v] caught panic: %v", req.RemoteAddr, x)
}
}()
f(w, req)
}
}
func main() {
http.HandleFunc("/simple1", LogPanic(SimpleServer))
http.HandleFunc("/simple2", LogPanic(FormServer))
if err := http.ListenAndServe(":8081", nil) ; err != nil {
panic(err)
}
}
