FB小游戏开发准备五（Java 创建 Webhook 服务提供Messenger 智能助手体验） - Facebook开发者社区

package com.airmyth.servlet;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.airmyth.util.JsonUtil;
@WebServlet("/webhook")
public class WebhookServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public WebhookServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
// 使用Messenger后台生成的token
private String faceToken = "**************tn3ADVR5nFEZA036wnFY94lt*************";
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
ServletInputStream sis = request.getInputStream();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
int bytes = 0;
byte[] buffer = new byte[8192];
while ((bytes = sis.read(buffer, 0, 8192)) != -1)
{
dos.write(buffer, 0, bytes);
}
String param = bos.toString("utf-8");
System.out.println("【param】"+param);
String mode = request.getParameter("hub.mode");
String token = request.getParameter("hub.verify_token");
String challenge = request.getParameter("hub.challenge");
System.out.println(mode);
System.out.println(token);
System.out.println(challenge);
System.out.println(JsonUtil.objToJson(request.getParameterMap()));
PrintWriter out = response.getWriter();
out.print(challenge); // hub.challenge 原封不动返回，用于校验
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}

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