Example Code for a Webhook Receiver Server

The following example applications -- one in Go, the other in Java -- are generic, universal webhook receivers that accept the POST from the AtScale platform and simply echo some of the posted parameters.

Example in Go

package main
import (
 "fmt"
 "log"
 "net/http"
 "strings"
)

func test(w http.ResponseWriter, r *http.Request) {
 r.ParseForm() // parse arguments, you have to call this by yourself
 fmt.Println(r.Form) // print form information in server side
 fmt.Println("path", r.URL.Path)
 fmt.Println("scheme", r.URL.Scheme)
 fmt.Println(r.Form["url_long"])
 for k, v := range r.Form {
  fmt.Println("key:", k)
  fmt.Println("val:", strings.Join(v, ""))
 }
 fmt.Fprintf(w, "Hello World!") // send data to client side
}

func main() {
 http.HandleFunc("/webhook", test) // set router
 err := http.ListenAndServe(":3030", nil) // set listen port
 if err != nil {
  log.Fatal("ListenAndServe: ", err)
 }
}

Example in Java

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
/*
* a simple static http server
*/
public class Webhook {
 public static void main(String[] args) throws Exception {
  HttpServer server = HttpServer.create(new InetSocketAddress(3030), 0);
  server.createContext("/test", new MyHandler());
  server.setExecutor(null); // creates a default executor
  System.out.println("starting"); server.start();
 }

 static class MyHandler implements HttpHandler {
  public void handle(HttpExchange exchange) throws IOException {
   String response = "finished";
   exchange.sendResponseHeaders(200, response.length());
   OutputStream os = exchange.getResponseBody();
   os.write(response.getBytes());
   os.close();
   System.out.println("uri is " + exchange.getRequestURI());
  }
 }
}

Related reference

Design Center Webhooks

Engine Webhooks