miduo_login/src/main/java/com/ljsd/controller/KTGetUserOpenIdController.java

package com.ljsd.controller;

import com.alibaba.fastjson.JSONObject;
import com.ljsd.util.HttpUtils;
import com.ljsd.util.MD5Util;
import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;

public class KTGetUserOpenIdController extends HttpServlet {

    private static final Logger LOGGER = LoggerFactory.getLogger(KTGetUserOpenIdController.class);

    public static String login_url = "http://api.kt007.com/api/v1/verify/user";
    public static String appkey = "vJnztWhAoOlxbPDdmYTrFLwZI";

    public KTGetUserOpenIdController() {
        super();
    }

    public void destroy() {
        super.destroy();
    }


    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        DBObject res = new BasicDBObject();
        String token = request.getParameter("access_token");
        if (token == null || token.isEmpty()) {
            returnErrorToFront(res, response, "token is empty");
            return;
        }
        String gid = request.getParameter("gid");   //gid
        String pid = request.getParameter("pid");   //pid
        String tm = Long.toString(System.currentTimeMillis() / 1000);
        LOGGER.info("the token = {},gid={},pid={} tm=>{}", token, gid, pid, tm);
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        SortedMap<String, String> params = new TreeMap<>();
        params.put("gid", gid);
        params.put("pid", pid);
        params.put("tm", tm);
        params.put("access_token", token);
        StringBuilder sbKey = new StringBuilder();
        Set<Map.Entry<String, String>> entries = params.entrySet();
        Iterator<Map.Entry<String, String>> iterator = entries.iterator();
        while (iterator.hasNext()) {
            Map.Entry<String, String> next = iterator.next();
            String key = next.getKey();
            String value = next.getValue();
            if (value == null || "".equals(value)) {
                continue;
            }
            if ("sign".equals(key) || "sign_type".equals(key)) {
                continue;
            }
            sbKey.append(key).append("=").append(value).append("&");
        }
        sbKey.append(appkey);
        String mySign = MD5Util.encrypByMd5(sbKey.toString());
        params.put("sign", mySign);
        String loginResult = HttpUtils.doPost(login_url, params);
//        LOGGER.info("二次请求 ： KTGetUserOpenIdController 加密前={} 加密后={} 请求结果={}", sbKey.toString(), mySign, loginResult);
        if (loginResult == null || loginResult.isEmpty()) {
            returnErrorToFront(res, response, "token is empty");
            return;
        }
        JSONObject jsonObject = JSONObject.parseObject(loginResult);
        int state = jsonObject.getIntValue("code");
        if (state == 200) {
            JSONObject data = (JSONObject) jsonObject.get("data");
            String openid = data.getString("openid");
            int is_certify = data.getIntValue("is_certify");
            int age = data.getIntValue("age");
            res.put("openid", openid);
            res.put("is_certify", is_certify);
            res.put("age", age);
        } else {
            returnErrorToFront(res, response, "SDK 返回错误");
            return;
        }
        PrintWriter out = response.getWriter();
        out.print(res);
        out.flush();
        out.close();
    }

    private void returnErrorToFront(DBObject res, HttpServletResponse response, String errorReason) throws IOException {
        res.put("errorCode", -1);
        res.put("reason", errorReason);
        PrintWriter out = response.getWriter();
        out.print(res);
        out.flush();
        out.close();
    }


    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        this.doGet(request, response);

    }

}