Third party login - Baidu

Posted by sureshmaharana on Fri, 03 Jan 2020 12:23:03 +0100

Third party login - Baidu

Prerequisite: have its own server, domain name.

First register an account in Baidu Developer Center

Then enter the application management interface under the account,

Create a project, and the API Key and Secret Key will be given after the project is created successfully.

Then create a new project venu in eclipse, index.jsp and result.jsp in the project, and create a new Servlet file BaiDuServlet

The code is as follows

Note that string client ID is API Key, client secret is Secret Key

       String redirect_uri = "http://www.aiyibiao.top/Venu/BaiDuServlet";
       String client_secret = "vlhIXxX5Y85BbLSXozG8is6NQEr2LMF0";
       String client_id = "ttSzZpxTXmIovXqFcbtuT3lc";

import java.io.IOException;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;

public class BaiDuServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String code = request.getParameter("code");
		String redirect_uri = "http://www.aiyibiao.top/Venu/BaiDuServlet";
		String client_secret = "vlhIXxX5Y85BbLSXozG8is6NQEr2LMF0";
		String client_id = "ttSzZpxTXmIovXqFcbtuT3lc";
		String url1 = "https://openapi.baidu.com/oauth/2.0/token?grant_type=authorization_code&code=" + code
				+ "&client_id=" + client_id + "&client_secret=" + client_secret + "&redirect_uri=" + redirect_uri + "";

		String content1 = "";

		try {
			
			CloseableHttpClient httpClient = HttpClients.createDefault();
			
			HttpGet getReq = new HttpGet(url1);

			getReq.addHeader("Accept",
					"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8    ");
			getReq.addHeader("Accept-Encoding", "gzip, deflate, sdch, br");
			getReq.addHeader("Accept-Language", "zh-CN,zh;q=0.8");
			getReq.addHeader("Cache-Control", "max-age=0");
			getReq.addHeader("Connection", "keep-alive");
			getReq.addHeader("Host", "openapi.baidu.com");
			getReq.addHeader("User-Agent",
					"Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36");

			HttpResponse res = httpClient.execute(getReq);

			HttpEntity entity = res.getEntity();
			content1 = EntityUtils.toString(entity, "UTF-8");

		} catch (Exception e) {
			e.printStackTrace();
		}

		Map<String, Object> map = JSON.parseObject(content1, new TypeReference<Map<String, Object>>() {
		});
		String access_token = (String) map.get("access_token");

		print(access_token, request, response);
	}

	public void print(String access_token,HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String content = "";
		String url = "https://openapi.baidu.com/rest/2.0/passport/users/getInfo?access_token=" + access_token + "";
		try {
			CloseableHttpClient httpClient = HttpClients.createDefault();
			HttpGet getReq = new HttpGet(url);

			getReq.addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8    ");
			getReq.addHeader("Accept-Encoding", "gzip, deflate, sdch, br");
			getReq.addHeader("Accept-Language", "zh-CN,zh;q=0.8");
			getReq.addHeader("Cache-Control", "max-age=0");
			getReq.addHeader("Connection", "keep-alive");
			getReq.addHeader("Host", "openapi.baidu.com");
			getReq.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36");

			HttpEntity entity = httpClient.execute(getReq).getEntity();
			content = EntityUtils.toString(entity, "UTF-8");
			System.out.println(content);
		} catch (Exception e) {
			e.printStackTrace();
		}

		Map<String, Object> map = JSON.parseObject(content, new TypeReference<Map<String, Object>>() {});
		System.out.println(map);
		String baiduid = (String) map.get("userid");
		System.out.println(baiduid);
		request.setAttribute("message", map);
		request.getRequestDispatcher("/result.jsp").forward(request, response);
	}
}

The code in index is as follows:

Note that the client? ID is the API Key value, and the redirect? URI is the new Baidu servlet file name

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<script type="text/javascript">
        function bdlogin(){
            location.href="https://openapi.baidu.com/oauth/2.0/authorize?response_type=code&client_id=ttSzZpxTXmIovXqFcbtuT3lc&redirect_uri=http://www.aiyibiao.top/Venu/BaiDuServlet&display=popup";
        }
</script>
<body>
<input type="button" value="Baidu login" onclick="bdlogin()">
</body>
</html>

The result.jsp code is as follows

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	<%=request.getAttribute("message") %>
</body>
</html>

After the project file is completed, it is exported to Jar package