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- // robust_webserver.go
- package main
- import (
- "net/http"
- "io"
- "log"
- )
- const form = `<html><body><form action="#" method="post" name="bar">
- <input type="text" name="in"/>
- <input type="submit" value="Submit"/>
- </form></html></body>`
- type HandleFnc func(http.ResponseWriter, *http.Request)
- /* handle a simple get request */
- func SimpleServer(w http.ResponseWriter, request *http.Request) {
- io.WriteString(w, "<h1>hello, world</h1>")
- }
- /* handle a form, both the GET which displays the form
- and the POST which processes it.*/
- func FormServer(w http.ResponseWriter, request *http.Request) {
- w.Header().Set("Content-Type", "text/html")
- switch request.Method {
- case "GET":
- /* display the form to the user */
- io.WriteString(w, form)
- case "POST":
- /* handle the form data, note that ParseForm must
- be called before we can extract form data*/
- //request.ParseForm();
- //io.WriteString(w, request.Form["in"][0])
- io.WriteString(w, request.FormValue("in"))
- }
- }
- func main() {
- http.HandleFunc("/test1", logPanics(SimpleServer))
- http.HandleFunc("/test2", logPanics(FormServer))
- if err := http.ListenAndServe(":8088", nil); err != nil {
- panic(err)
- }
- }
- func logPanics(function HandleFnc) HandleFnc {
- return func(writer http.ResponseWriter, request *http.Request) {
- defer func() {
- if x := recover(); x != nil {
- log.Printf("[%v] caught panic: %v", request.RemoteAddr, x)
- }
- }()
- function(writer, request)
- }
- }
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