前后端分离项目 — SpringSocial 绑定与解绑社交账号如微信、QQ

摘要：我们以微信为例，首先我们发送一个请求，因为你已经登录了，所以后台可以获取当前是谁，然后就获取到请求的链接，最后就是跳转到这个链接上面去。

申请QQ、微信相关AppId和AppSecret，这些大家自己到QQ互联和微信开发平台 去申请吧
还有java后台要引入相关的jar包，如下：

 
     
         org.springframework.security.oauth.boot
         spring-security-oauth2-autoconfigure
     
     
         org.springframework.security.oauth
         spring-security-oauth2
         2.3.3.RELEASE
     
     
         org.springframework.boot
         spring-boot-starter-security
     
     
         
         
     
     
         org.springframework.cloud
         spring-cloud-starter-security
     

     
         org.springframework.cloud
         spring-cloud-starter-oauth2
     
     
         org.springframework.boot
         spring-boot-starter-data-redis
     
     
         org.springframework.boot
         spring-boot-starter-jdbc
     
     
         mysql
         mysql-connector-java
     
     
         org.springframework.social
         spring-social-config
         1.1.6.RELEASE
     
     
         org.springframework.social
         spring-social-core
         1.1.6.RELEASE
     
     
         org.springframework.social
         spring-social-security
         1.1.6.RELEASE
     
     
         org.springframework.social
         spring-social-web
         1.1.6.RELEASE
     
     
         io.jsonwebtoken
         jjwt
         0.9.1
     

     
         org.apache.commons
         commons-lang3
         3.7
     

     
         org.apache.commons
         commons-collections4
         4.2
     

     
         commons-beanutils
         commons-beanutils
         1.9.3
     
     
         org.springframework.boot
         spring-boot-configuration-processor
     
     
         org.springframework.data
         spring-data-mongodb
         2.0.9.RELEASE
     
     
         org.springframework.boot
         spring-boot-starter-data-mongodb
         2.0.4.RELEASE
     
     
         com.fasterxml.jackson.core
         jackson-core
         2.9.6
     

然后在application.properties里面设置相关配置，如redis、mysql等设置，如下：

 spring.datasource.url=
 spring.datasource.username=
 spring.datasource.password=
 spring.datasource.driverClassName=com.mysql.jdbc.Driver
 
 spring.redis.host=127.0.0.1
 spring.redis.password=your_pwd
 spring.redis.port=6379
 spring.redis.timeout=30000
 
 ssb.security.social.register-url=/social/signUp
 ssb.security.social.filter-processes-url=/social-login
 ssb.security.social.bind-url=https://website/social-bind/qq
 ssb.security.social.callback-url=https://website/social-login
 ssb.security.social.connect-url=https://website/social-connect

 //QQ授权
 ssb.security.social.qq.app-id=
 ssb.security.social.qq.app-secret=
 ssb.security.social.qq.provider-id=qq
 
 //WeChat授权
 ssb.security.social.wechat.app-id=
 ssb.security.social.wechat.app-secret=
 ssb.security.social.wechat.provider-id=wechat

准备工作做好之后，现在我们开始分析社交绑定，其实spring-social框架里已经自带了spring-social-web，这个jar包里面有个ConnectController.java类，这个类已经帮我们实现了相关绑定与解绑实现方法，问题在于它是基于Session的，所以如果是前后端分离项目使用Session当然应有问题，所以我们要结合Redis来使用，把相关变量都存在Redis中，所以我们上面已经配置好了Redis，我们再来看看Redis配置代码：

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory factory){
        return new RestTemplate(factory);
    }

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory(){
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setReadTimeout(50000);//单位为ms
        factory.setConnectTimeout(50000);//单位为ms
        return factory;
    }
}

设置好之后，我们来分析一下spring-social-web这个jar包获取社交账号绑定情况，它的请求地址是/connect，代码如下：

@Controller
@RequestMapping({"/connect"})
public class ConnectController implements InitializingBean {
    private static final Log logger = LogFactory.getLog(ConnectController.class);
    private final ConnectionFactoryLocator connectionFactoryLocator;
    private final ConnectionRepository connectionRepository;
    private final MultiValueMap, ConnectInterceptor> connectInterceptors = new LinkedMultiValueMap();
    private final MultiValueMap, DisconnectInterceptor> disconnectInterceptors = new LinkedMultiValueMap();
    private ConnectSupport connectSupport;
    private final UrlPathHelper urlPathHelper = new UrlPathHelper();
    private String viewPath = "connect/";
    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();
    private String applicationUrl = null;
    protected static final String DUPLICATE_CONNECTION_ATTRIBUTE = "social_addConnection_duplicate";
    protected static final String PROVIDER_ERROR_ATTRIBUTE = "social_provider_error";
    protected static final String AUTHORIZATION_ERROR_ATTRIBUTE = "social_authorization_error";

    @Inject
    public ConnectController(ConnectionFactoryLocator connectionFactoryLocator, ConnectionRepository connectionRepository) {
        this.connectionFactoryLocator = connectionFactoryLocator;
        this.connectionRepository = connectionRepository;
    }

    /** @deprecated */
    @Deprecated
    public void setInterceptors(List> interceptors) {
        this.setConnectInterceptors(interceptors);
    }

    public void setConnectInterceptors(List> interceptors) {
        Iterator var2 = interceptors.iterator();

        while(var2.hasNext()) {
            ConnectInterceptor interceptor = (ConnectInterceptor)var2.next();
            this.addInterceptor(interceptor);
        }

    }

    public void setDisconnectInterceptors(List> interceptors) {
        Iterator var2 = interceptors.iterator();

        while(var2.hasNext()) {
            DisconnectInterceptor interceptor = (DisconnectInterceptor)var2.next();
            this.addDisconnectInterceptor(interceptor);
        }

    }

    public void setApplicationUrl(String applicationUrl) {
        this.applicationUrl = applicationUrl;
    }

    public void setViewPath(String viewPath) {
        this.viewPath = viewPath;
    }

    public void setSessionStrategy(SessionStrategy sessionStrategy) {
        this.sessionStrategy = sessionStrategy;
    }

    public void addInterceptor(ConnectInterceptor interceptor) {
        Class serviceApiType = GenericTypeResolver.resolveTypeArgument(interceptor.getClass(), ConnectInterceptor.class);
        this.connectInterceptors.add(serviceApiType, interceptor);
    }

    public void addDisconnectInterceptor(DisconnectInterceptor interceptor) {
        Class serviceApiType = GenericTypeResolver.resolveTypeArgument(interceptor.getClass(), DisconnectInterceptor.class);
        this.disconnectInterceptors.add(serviceApiType, interceptor);
    }

    @RequestMapping(
        method = {RequestMethod.GET}
    )
    public String connectionStatus(NativeWebRequest request, Model model) {
        this.setNoCache(request);
        this.processFlash(request, model);
        Map>> connections = this.connectionRepository.findAllConnections();
        model.addAttribute("providerIds", this.connectionFactoryLocator.registeredProviderIds());
        model.addAttribute("connectionMap", connections);
        return this.connectView();
    }

    @RequestMapping(
        value = {"/{providerId}"},
        method = {RequestMethod.GET}
    )
    public String connectionStatus(@PathVariable String providerId, NativeWebRequest request, Model model) {
        this.setNoCache(request);
        this.processFlash(request, model);
        List> connections = this.connectionRepository.findConnections(providerId);
        this.setNoCache(request);
        if(connections.isEmpty()) {
            return this.connectView(providerId);
        } else {
            model.addAttribute("connections", connections);
            return this.connectedView(providerId);
        }
    }

    @RequestMapping(
        value = {"/{providerId}"},
        method = {RequestMethod.POST}
    )
    public RedirectView connect(@PathVariable String providerId, NativeWebRequest request) {
        ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
        MultiValueMap parameters = new LinkedMultiValueMap();
        this.preConnect(connectionFactory, parameters, request);

        try {
            return new RedirectView(this.connectSupport.buildOAuthUrl(connectionFactory, request, parameters));
        } catch (Exception var6) {
            this.sessionStrategy.setAttribute(request, "social_provider_error", var6);
            return this.connectionStatusRedirect(providerId, request);
        }
    }

    @RequestMapping(
        value = {"/{providerId}"},
        method = {RequestMethod.GET},
        params = {"oauth_token"}
    )
    public RedirectView oauth1Callback(@PathVariable String providerId, NativeWebRequest request) {
        try {
            OAuth1ConnectionFactory connectionFactory = (OAuth1ConnectionFactory)this.connectionFactoryLocator.getConnectionFactory(providerId);
            Connection connection = this.connectSupport.completeConnection(connectionFactory, request);
            this.addConnection(connection, connectionFactory, request);
        } catch (Exception var5) {
            this.sessionStrategy.setAttribute(request, "social_provider_error", var5);
            logger.warn("Exception while handling OAuth1 callback (" + var5.getMessage() + "). Redirecting to " + providerId + " connection status page.");
        }

        return this.connectionStatusRedirect(providerId, request);
    }

    @RequestMapping(
        value = {"/{providerId}"},
        method = {RequestMethod.GET},
        params = {"code"}
    )
    public RedirectView oauth2Callback(@PathVariable String providerId, NativeWebRequest request) {
        try {
            OAuth2ConnectionFactory connectionFactory = (OAuth2ConnectionFactory)this.connectionFactoryLocator.getConnectionFactory(providerId);
            Connection connection = this.connectSupport.completeConnection(connectionFactory, request);
            this.addConnection(connection, connectionFactory, request);
        } catch (Exception var5) {
            this.sessionStrategy.setAttribute(request, "social_provider_error", var5);
            logger.warn("Exception while handling OAuth2 callback (" + var5.getMessage() + "). Redirecting to " + providerId + " connection status page.");
        }

        return this.connectionStatusRedirect(providerId, request);
    }

    @RequestMapping(
        value = {"/{providerId}"},
        method = {RequestMethod.GET},
        params = {"error"}
    )
    public RedirectView oauth2ErrorCallback(@PathVariable String providerId, @RequestParam("error") String error, @RequestParam(value = "error_description",required = false) String errorDescription, @RequestParam(value = "error_uri",required = false) String errorUri, NativeWebRequest request) {
        Map errorMap = new HashMap();
        errorMap.put("error", error);
        if(errorDescription != null) {
            errorMap.put("errorDescription", errorDescription);
        }

        if(errorUri != null) {
            errorMap.put("errorUri", errorUri);
        }

        this.sessionStrategy.setAttribute(request, "social_authorization_error", errorMap);
        return this.connectionStatusRedirect(providerId, request);
    }

    @RequestMapping(
        value = {"/{providerId}"},
        method = {RequestMethod.DELETE}
    )
    public RedirectView removeConnections(@PathVariable String providerId, NativeWebRequest request) {
        ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
        this.preDisconnect(connectionFactory, request);
        this.connectionRepository.removeConnections(providerId);
        this.postDisconnect(connectionFactory, request);
        return this.connectionStatusRedirect(providerId, request);
    }

    @RequestMapping(
        value = {"/{providerId}/{providerUserId}"},
        method = {RequestMethod.DELETE}
    )
    public RedirectView removeConnection(@PathVariable String providerId, @PathVariable String providerUserId, NativeWebRequest request) {
        ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
        this.preDisconnect(connectionFactory, request);
        this.connectionRepository.removeConnection(new ConnectionKey(providerId, providerUserId));
        this.postDisconnect(connectionFactory, request);
        return this.connectionStatusRedirect(providerId, request);
    }

    protected String connectView() {
        return this.getViewPath() + "status";
    }

    protected String connectView(String providerId) {
        return this.getViewPath() + providerId + "Connect";
    }

    protected String connectedView(String providerId) {
        return this.getViewPath() + providerId + "Connected";
    }

    protected RedirectView connectionStatusRedirect(String providerId, NativeWebRequest request) {
        HttpServletRequest servletRequest = (HttpServletRequest)request.getNativeRequest(HttpServletRequest.class);
        String path = "/connect/" + providerId + this.getPathExtension(servletRequest);
        if(this.prependServletPath(servletRequest)) {
            path = servletRequest.getServletPath() + path;
        }

        return new RedirectView(path, true);
    }

    public void afterPropertiesSet() throws Exception {
        this.connectSupport = new ConnectSupport(this.sessionStrategy);
        if(this.applicationUrl != null) {
            this.connectSupport.setApplicationUrl(this.applicationUrl);
        }

    }

    private boolean prependServletPath(HttpServletRequest request) {
        return !this.urlPathHelper.getPathWithinServletMapping(request).equals("");
    }

    private String getPathExtension(HttpServletRequest request) {
        String fileName = this.extractFullFilenameFromUrlPath(request.getRequestURI());
        String extension = StringUtils.getFilenameExtension(fileName);
        return extension != null?"." + extension:"";
    }

    private String extractFullFilenameFromUrlPath(String urlPath) {
        int end = urlPath.indexOf(63);
        if(end == -1) {
            end = urlPath.indexOf(35);
            if(end == -1) {
                end = urlPath.length();
            }
        }

        int begin = urlPath.lastIndexOf(47, end) + 1;
        int paramIndex = urlPath.indexOf(59, begin);
        end = paramIndex != -1 && paramIndex < end?paramIndex:end;
        return urlPath.substring(begin, end);
    }

    private String getViewPath() {
        return this.viewPath;
    }

    private void addConnection(Connection connection, ConnectionFactory connectionFactory, WebRequest request) {
        try {
            this.connectionRepository.addConnection(connection);
            this.postConnect(connectionFactory, connection, request);
        } catch (DuplicateConnectionException var5) {
            this.sessionStrategy.setAttribute(request, "social_addConnection_duplicate", var5);
        }

    }

    private void preConnect(ConnectionFactory connectionFactory, MultiValueMap parameters, WebRequest request) {
        Iterator var4 = this.interceptingConnectionsTo(connectionFactory).iterator();

        while(var4.hasNext()) {
            ConnectInterceptor interceptor = (ConnectInterceptor)var4.next();
            interceptor.preConnect(connectionFactory, parameters, request);
        }

    }

    private void postConnect(ConnectionFactory connectionFactory, Connection connection, WebRequest request) {
        Iterator var4 = this.interceptingConnectionsTo(connectionFactory).iterator();

        while(var4.hasNext()) {
            ConnectInterceptor interceptor = (ConnectInterceptor)var4.next();
            interceptor.postConnect(connection, request);
        }

    }

    private void preDisconnect(ConnectionFactory connectionFactory, WebRequest request) {
        Iterator var3 = this.interceptingDisconnectionsTo(connectionFactory).iterator();

        while(var3.hasNext()) {
            DisconnectInterceptor interceptor = (DisconnectInterceptor)var3.next();
            interceptor.preDisconnect(connectionFactory, request);
        }

    }

    private void postDisconnect(ConnectionFactory connectionFactory, WebRequest request) {
        Iterator var3 = this.interceptingDisconnectionsTo(connectionFactory).iterator();

        while(var3.hasNext()) {
            DisconnectInterceptor interceptor = (DisconnectInterceptor)var3.next();
            interceptor.postDisconnect(connectionFactory, request);
        }

    }

    private List> interceptingConnectionsTo(ConnectionFactory connectionFactory) {
        Class serviceType = GenericTypeResolver.resolveTypeArgument(connectionFactory.getClass(), ConnectionFactory.class);
        List> typedInterceptors = (List)this.connectInterceptors.get(serviceType);
        if(typedInterceptors == null) {
            typedInterceptors = Collections.emptyList();
        }

        return typedInterceptors;
    }

    private List> interceptingDisconnectionsTo(ConnectionFactory connectionFactory) {
        Class serviceType = GenericTypeResolver.resolveTypeArgument(connectionFactory.getClass(), ConnectionFactory.class);
        List> typedInterceptors = (List)this.disconnectInterceptors.get(serviceType);
        if(typedInterceptors == null) {
            typedInterceptors = Collections.emptyList();
        }

        return typedInterceptors;
    }

    private void processFlash(WebRequest request, Model model) {
        this.convertSessionAttributeToModelAttribute("social_addConnection_duplicate", request, model);
        this.convertSessionAttributeToModelAttribute("social_provider_error", request, model);
        model.addAttribute("social_authorization_error", this.sessionStrategy.getAttribute(request, "social_authorization_error"));
        this.sessionStrategy.removeAttribute(request, "social_authorization_error");
    }

    private void convertSessionAttributeToModelAttribute(String attributeName, WebRequest request, Model model) {
        if(this.sessionStrategy.getAttribute(request, attributeName) != null) {
            model.addAttribute(attributeName, Boolean.TRUE);
            this.sessionStrategy.removeAttribute(request, attributeName);
        }

    }

    private void setNoCache(NativeWebRequest request) {
        HttpServletResponse response = (HttpServletResponse)request.getNativeResponse(HttpServletResponse.class);
        if(response != null) {
            response.setHeader("Pragma", "no-cache");
            response.setDateHeader("Expires", 1L);
            response.setHeader("Cache-Control", "no-cache");
            response.addHeader("Cache-Control", "no-store");
        }

    }
}

上面就是ConnectController的源码了，我们现在分析一下获取当前用户社交绑定情况的方法：

      @RequestMapping(
      method = {RequestMethod.GET}
  )
  public String connectionStatus(NativeWebRequest request, Model model) {
      this.setNoCache(request);
      this.processFlash(request, model);
      Map>> connections = this.connectionRepository.findAllConnections();
      model.addAttribute("providerIds", this.connectionFactoryLocator.registeredProviderIds());
      model.addAttribute("connectionMap", connections);
      return this.connectView();
  }

  @RequestMapping(
      value = {"/{providerId}"},
      method = {RequestMethod.GET}
  )
  public String connectionStatus(@PathVariable String providerId, NativeWebRequest request, Model model) {
      this.setNoCache(request);
      this.processFlash(request, model);
      List> connections = this.connectionRepository.findConnections(providerId);
      this.setNoCache(request);
      if(connections.isEmpty()) {
          return this.connectView(providerId);
      } else {
          model.addAttribute("connections", connections);
          return this.connectedView(providerId);
      }
  }

对了，就是这两个方法，前面第一个方法请求的地址是：/connect(需要用户登录) 这个地址是获取当前用户所有社交账号绑定情况，第二个方法请求的地址是：/connect/{providerId}(需要用户登录) 这个地址是获取某个社交账号绑定情况，如/connect/qq，所以我们要获取当前用户绑定的所有社交账号绑定情况，使用的是第一个方法，但是现在有个问题，获取完之后 它是直接跳转页面到/connect/status，当然这不是我们想要的，我们要修改这个类，比如地址换成/socialConnect，这个换成自己的就好，然后我们来改下这个方法，如下：

 @RequestMapping(
         method = {RequestMethod.GET}
 )
 public ResponseEntity connectionStatus(NativeWebRequest request, Model model) throws JsonProcessingException {
     this.setNoCache(request);
     this.processFlash(request, model);
     Map>> connections = this.connectionRepository.findAllConnections();
     model.addAttribute("providerIds", this.connectionFactoryLocator.registeredProviderIds());
     model.addAttribute("connectionMap", connections);
     Map result = new HashMap();
     for (String key : connections.keySet()){
         result.put(key, org.apache.commons.collections.CollectionUtils.isNotEmpty(connections.get(key)));
     }
     return ResponseEntity.ok(objectMapper.writeValueAsString(result));
 }

改好的代码直接返回Json数据给前端，而不是跳转页面，完美解决了前后端分离项目问题，好了，我们使用postman发送请求测试看看：

如图所示，我们成功获取当前登录用户所有社交账号绑定情况了(为什么这里只有qq和微信？社交账号的类型是你application.proterties里面配置的)。

好了，我们来看看绑定社交账号的方法：

  @RequestMapping(
      value = {"/{providerId}"},
      method = {RequestMethod.POST}
  )
  public RedirectView connect(@PathVariable String providerId, NativeWebRequest request) {
      ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
      MultiValueMap parameters = new LinkedMultiValueMap();
      this.preConnect(connectionFactory, parameters, request);

      try {
          return new RedirectView(this.connectSupport.buildOAuthUrl(connectionFactory, request, parameters));
      } catch (Exception var6) {
          this.sessionStrategy.setAttribute(request, "social_provider_error", var6);
          return this.connectionStatusRedirect(providerId, request);
      }
  }
  
  @RequestMapping(
      value = {"/{providerId}"},
      method = {RequestMethod.GET},
      params = {"code"}
  )
  public RedirectView oauth2Callback(@PathVariable String providerId, NativeWebRequest request) {
      try {
          OAuth2ConnectionFactory connectionFactory = (OAuth2ConnectionFactory)this.connectionFactoryLocator.getConnectionFactory(providerId);
          Connection connection = this.connectSupport.completeConnection(connectionFactory, request);
          this.addConnection(connection, connectionFactory, request);
      } catch (Exception var5) {
          this.sessionStrategy.setAttribute(request, "social_provider_error", var5);
          logger.warn("Exception while handling OAuth2 callback (" + var5.getMessage() + "). Redirecting to " + providerId + " connection status page.");
      }

      return this.connectionStatusRedirect(providerId, request);
  }

现在来分析 下这两个 方法的作用，第一个方法请求的地址是：POST /connect/{providerId}(需要登录) ，第二个方法请求地址是：GET /connect/{providerId}?code=&state=(需要登录)，第一个方法是获取社交授权连接地址（这个是你自己社交登录时候封装好的，这里我不打算详细讲解，后面课程再放出来吧）比如qq的授权地址：https://graph.qq.com/oauth2.0...，这样当你授权成功之后就回调到了第二个方法里面，顺便把code和state原样返回过来，这一套绑定机制都是基于session的，下面我们来分析看下他是如何实现的。

我们以微信为例，首先我们发送一个POST请求/connect/wechat，因为你已经登录了，所以后台可以获取当前user是谁，然后就获取到请求的链接：https://open.weixin.qq.com/co...，最后就是跳转到这个链接上面去。这是第一个方法的作用，接下来我们分析第二个方法。

请求上面的链接之后就是跳转到微信扫码的页面，如下所示：

扫完之后立马就跳到上面链接redirect_uri地址上面去，也就是现在的第二个方法上面，而且是带着state和code两个参数，这时候后台开始验证你回传过来的state值是不是匹配的，不匹配就报错并且跳转到出错页面，匹配的话就往下走，并且通过code获取SpringSecurity OAuth相关社交用户信息并保存到数据库中，这就是code和state的作用，验证和获取完之后就可以，这样你就绑定成功了，最后跳转到/connected/wechat页面了，这样就结束了绑定功能了。

那么我们前后端分离项目要使用这套机制，我们必须改一下他的源码了。

首先第一个方法，我们要把userId保存到以state的redis键值对中，也就是：{state:userId}，然后以JSON的格式返回社交授权的链接给前台，这是第一个方法要修改的思路。

然后第二个方法，是社交授权链接返回回来的，因为前后端分离项目session就无法使用了，所以要获取用户信息必须通过上面redis保存的{state:userId}，来获取用户id。再一个我们通过code获取社交用户信息，两个数据都获取了，这个时候我们就可以安心的把社交用户信息保存到数据库中(这里的通过state从redis中获取userId，其实也是一种验证state的方式，你想想可是呢！)，最后就跳转到你想要的页面就好了，下面就是修改后的代码了，可以看看：

@RequestMapping(
            value = {"/{providerId}"},
            method = {RequestMethod.POST}
    )
    public ResponseEntity connect(@PathVariable String providerId,
                                     NativeWebRequest request) {
        HttpServletRequest nativeRequest = request.getNativeRequest(HttpServletRequest.class);
        Principal user = nativeRequest.getUserPrincipal();
        ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
        MultiValueMap parameters = new LinkedMultiValueMap();
        this.preConnect(connectionFactory, parameters, request);
        try {
            String social_connect_url = this.connectSupport.buildOAuthUrl(connectionFactory, request, parameters);
            String state = (String) this.sessionStrategy.getAttribute(request, "oauth2State");
            this.sessionStrategy.removeAttribute(request, "oauth2State");
            //把userId以state为key的形式保存到redis中
            socialRedisHelper.saveStateUserId(state, user.getName());
            //返回社交链接地址
            return ResponseEntity.ok(social_connect_url);
        } catch (Exception var6) {
            this.sessionStrategy.setAttribute(request, "social_provider_error", var6);
            logger.info(var6.getMessage());
            return null;
        }
    }
    
    //辅助方法1
    protected String callbackUrl(NativeWebRequest request) {
        if (this.callbackUrl != null) {
            return this.callbackUrl;
        } else {
            HttpServletRequest nativeRequest = request.getNativeRequest(HttpServletRequest.class);
            return this.applicationUrl != null ? this.applicationUrl + this.connectPath(nativeRequest) : nativeRequest.getRequestURL().toString();
        }
    }

    //辅助方法2
    private String connectPath(HttpServletRequest request) {
        String pathInfo = request.getPathInfo();
        return request.getServletPath() + (pathInfo != null ? pathInfo : "");
    }

    //回调方法
    @RequestMapping(
            value = {"/{providerId}"},
            method = {RequestMethod.GET},
            params = {"code"}
    )
    public void oauth2Callback(@PathVariable String providerId,
                               NativeWebRequest request,
                               HttpServletResponse response) {
        try {
            //ConnectController是先保存在session里面，然后回调从session里面取出来校验
            //我现在是通过redis保存state 的 userId，这样就相当于校验了state
            String state = request.getParameter("state");
            String code = request.getParameter("code");
            OAuth2ConnectionFactory connectionFactory = (OAuth2ConnectionFactory) this.connectionFactoryLocator.getConnectionFactory(providerId);
            AccessGrant accessGrant = connectionFactory.getOAuthOperations().exchangeForAccess(code, this.callbackUrl(request), null);
            Connection connection = connectionFactory.createConnection(accessGrant);
            //从redis中获取userid
            String userId = socialRedisHelper.getStateUserId(state);
            //保存到数据库中
            jdbcConnectionRepository.createConnectionRepository(userId).addConnection(connection);
            //跳转页面到前台任何你想设置的地址
            response.sendRedirect(connectUrl);
        } catch (Exception ex) {
            logger.info(ex.getMessage());
        }
    }

这样你就完成了后台绑定相关工作，那么我把前端相关代码也放出来大家看下吧：

gotoBind(type){
            let url = `${this.$url}/socialConnect/${type}`;
            this.$post(url)
            .then(res=>{
                if(res.code == 0){
                    this.openWindow(res.data.redirect_uri)
                }
            })
        },
openWindow(url){
            let sf_H = 550;
            let sf_W = 720;
            var iTop = (window.screen.height-30 -sf_H)/2; //获得窗口的垂直位置;  
            var iLeft = (window.screen.width-10 -sf_W)/2; //获得窗口的水平位置;
            let s = window.open(url,"social_bind_form","height="+sf_H+
            ", width="+sf_W+",top="+iTop+",left="+iLeft+"toolbar=no, menubar=no, scrollbars=no, status=no, location=yes, resizable=yes");
        },

上面是获取社交绑定地址并跳转，下面是回调成功之后关闭对话框并刷新的页面代码。

我们来演示一下：

绑定社交账号已经成功了，现在我们来看一下如何解绑社交账号吧，我们先看下源码是如何实现的，如下

@RequestMapping(
        value = {"/{providerId}"},
        method = {RequestMethod.DELETE}
    )
    public RedirectView removeConnections(@PathVariable String providerId, NativeWebRequest request) {
        ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
        this.preDisconnect(connectionFactory, request);
        this.connectionRepository.removeConnections(providerId);
        this.postDisconnect(connectionFactory, request);
        return this.connectionStatusRedirect(providerId, request);
    }

    @RequestMapping(
        value = {"/{providerId}/{providerUserId}"},
        method = {RequestMethod.DELETE}
    )
    public RedirectView removeConnection(@PathVariable String providerId, @PathVariable String providerUserId, NativeWebRequest request) {
        ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
        this.preDisconnect(connectionFactory, request);
        this.connectionRepository.removeConnection(new ConnectionKey(providerId, providerUserId));
        this.postDisconnect(connectionFactory, request);
        return this.connectionStatusRedirect(providerId, request);
    }

第一个方法请求地址是：Delete /connect/{providerId}(需登录)，第二个方法请求地址是：Delete /connect/{providerId}/{providerUserId}(需登录)，注意这里的providerUserId其实就是社交用户id,比如微信的openId，第一个方法是根据登录的userId和providerId来删除数据库中绑定的社交用户数据，第二个方法是根据登录的userId和providerId还有providerUserId来删除数据库中绑定的社交用户数据，这两个 方法都有相同的一点就是跳转到删除之后的页面，所以我们只要把跳转页面以JSON的形式返回给前端就好，下面就是修改后的代码：

 @RequestMapping(
            value = {"/{providerId}"},
            method = {RequestMethod.DELETE}
    )
    public ResponseEntity removeConnections(@PathVariable String providerId, NativeWebRequest request) {
        ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
        this.preDisconnect(connectionFactory, request);
        this.connectionRepository.removeConnections(providerId);
        this.postDisconnect(connectionFactory, request);
        return ResponseEntity.ok("success");
    }

    @RequestMapping(
            value = {"/{providerId}/{providerUserId}"},
            method = {RequestMethod.DELETE}
    )
    public ResponseEntity removeConnection(@PathVariable String providerId,
                                              @PathVariable String providerUserId,
                                              NativeWebRequest request) throws IOException {
        try {
            ConnectionFactory connectionFactory = this.connectionFactoryLocator.getConnectionFactory(providerId);
            this.preDisconnect(connectionFactory, request);
            this.connectionRepository.removeConnection(new ConnectionKey(providerId, providerUserId));
            this.postDisconnect(connectionFactory, request);
        } catch (Exception ex) {
            logger.info(ex.getMessage());
        }
        return ResponseEntity.ok("success");
    }

我们再把前端代码贴出来：

gotoUnBind(type){
            let url = `${this.$url}/socialConnect/${type}`;
            this.$delete(url)
            .then(res=>{
                if(res.code == 0){
                    this.$Message.success("解绑成功！")
                    location.reload();
                }
            })
        },

1、只要把思路理清楚了，其实修改成自己想要的代码就不难
2、注意ConnectController代码是基于Session的，所以你必须要登录的情况下才能使用
3、redis的使用在这里发挥到了一定作用，所以说前后端分离项目离不开redis

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