由于微信端流量比较足,所以扫码登录系统功能也受到了很多系统的青睐,本文就来详细的解开该技术的面纱
点击查看该应用,将appid appSecret获取下来,我们后面会用到。
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-thymeleafartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.apache.httpcomponentsgroupId>
<artifactId>httpclientartifactId>
<version>4.1version>
dependency>
<dependency>
<groupId>org.jsongroupId>
<artifactId>jsonartifactId>
<version>20160810version>
dependency>
spring.thymeleaf.prefix: classpath:/templates/
spring.thymeleaf.suffix: .html
#微信开放平台创建的网站应用的appsecret
appsecret=
#微信开放平台创建的网站应用的appid
appid=
scope=snsapi_login
#微信开放平台创建的网站 设置的授权回调域
domain=http://test.xcx.cxylt.cn/
server.port=8083
微信OAuth2.0授权登录让微信用户使用微信身份安全登录第三方应用或网站,在微信用户授权登录已接入微信OAuth2.0的第三方应用后,第三方可以获取到用户的接口调用凭证(access_token),通过access_token可以进行微信开放平台授权关系接口调用,从而可实现获取微信用户基本开放信息和帮助用户实现基础开放功能等。
微信OAuth2.0授权登录目前支持authorization_code模式,适用于拥有server端的应用授权。该模式整体流程为:
简单来讲就是用户在页面生成二维码扫码后进入回调地址,回调地址可以获取code,通过code可以获取accessToken,通过accessToken则可以获取用户的全部信息
后端代码,生成授权地址,让用户点击扫码登录
@RequestMapping("/")
public String index(Model model) throws UnsupportedEncodingException {
String oauthUrl = "https://open.weixin.qq.com/connect/qrconnect?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect";
String redirect_uri = URLEncoder.encode(callBack, "utf-8"); ;
oauthUrl = oauthUrl.replace("APPID",appid).replace("REDIRECT_URI",redirect_uri).replace("SCOPE",scope);
model.addAttribute("name","liuzp");
model.addAttribute("oauthUrl",oauthUrl);
return "index";
}
前端代码
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Titletitle>
head>
<body>
<h1>hello! <label th:text="${name}">label>h1>
<a th:href="${oauthUrl}">点击扫码登录a>
body>
html>
编写授权后回调方法
@RequestMapping("/callBack")
public String callBack(String code,String state,Model model) throws Exception{
logger.info("进入授权回调,code:{},state:{}",code,state);
//1.通过code获取access_token
String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
url = url.replace("APPID",appid).replace("SECRET",appsecret).replace("CODE",code);
String tokenInfoStr = HttpRequestUtils.httpGet(url,null,null);
JSONObject tokenInfoObject = new JSONObject(tokenInfoStr);
logger.info("tokenInfoObject:{}",tokenInfoObject);
//2.通过access_token和openid获取用户信息
String userInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID";
userInfoUrl = userInfoUrl.replace("ACCESS_TOKEN",tokenInfoObject.getString("access_token")).replace("OPENID",tokenInfoObject.getString("openid"));
String userInfoStr = HttpRequestUtils.httpGet(userInfoUrl,null,null);
logger.info("userInfoObject:{}",userInfoStr);
model.addAttribute("tokenInfoObject",tokenInfoObject);
model.addAttribute("userInfoObject",userInfoStr);
return "result";
}
回调后跳转页面,这个页面记录授权获取的信息
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>授权结果页title>
head>
<script src="http://res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js">script>
<body>
<h2>你好,授权成功!h2><br>
<h3>通过code换取access_token 结果:h3>
<p th:text="${tokenInfoObject}">p>
<h3>通过access_token获取用户信息 结果:h3>
<p th:text="${userInfoObject}">p>
body>
html>
后端路由
@RequestMapping("/1")
public String index1(Model model) throws UnsupportedEncodingException {
String redirect_uri = URLEncoder.encode(callBack, "utf-8"); ;
model.addAttribute("name","liuzp");
model.addAttribute("appid",appid);
model.addAttribute("scope",scope);
model.addAttribute("redirect_uri",redirect_uri);
return "index1";
}
前台页面
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>内嵌(自定义二维码)title>
head>
<script src="http://res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js">script>
<body>
<h1>hello! <label th:text="${name}">label>h1>
<div id="login_container">div>
<script th:inline="javascript">
var obj = new WxLogin({
self_redirect:true,
id:"login_container",
appid: [[${appid}]],
scope: [[${scope}]],
redirect_uri: [[${redirect_uri}]],
state: "",
style: "",
href: ""
});
script>
body>
html>
两个页面结果页和回调地址都是一致的,这里只是提供两种做法
https://github.com/pengziliu/spring-boot-2.0-leaning.git