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server.go
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43 lines (36 loc) · 1.23 KB
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// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
// The original code was published at http://www.gopl.io, see page 21.
// This is an "echo" server that displays request parameters.
package main
import (
"fmt"
"log"
"net/http"
)
func main() {
fmt.Println("This is an \"echo\" server that displays request parameters.")
fmt.Println("Start the server and send a http request to it (e.g.")
fmt.Println("curl http://localhost:8000/help). The server uses port 8000.")
fmt.Println("If KVM is implicitly started by our proxy, please open the port by")
fmt.Println("setting the environment variable HERMIT_APP_PORT to 8000.")
http.HandleFunc("/", handler)
log.Fatal(http.ListenAndServe(":8000", nil))
}
//!+handler
// handler echoes the HTTP request.
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "%s %s %s\n", r.Method, r.URL, r.Proto)
for k, v := range r.Header {
fmt.Fprintf(w, "Header[%q] = %q\n", k, v)
}
fmt.Fprintf(w, "Host = %q\n", r.Host)
fmt.Fprintf(w, "RemoteAddr = %q\n", r.RemoteAddr)
if err := r.ParseForm(); err != nil {
log.Print(err)
}
for k, v := range r.Form {
fmt.Fprintf(w, "Form[%q] = %q\n", k, v)
}
}
//!-handler