社交登入又稱作社會化登入（Social Login），是指網站的使用者可以使用騰訊QQ、人人網、開心網、新浪微博、搜狐微博、騰訊微博、淘寶、豆瓣、MSN、Google等社會化媒體賬號登入該網站。

前言

在上一章Spring-Security原始碼分析三-Spring-Social社交登入過程中，我們已經實現了使用Spring Social+Security的QQ社交登入。本章我們將實現微信的社交登入。（微信和QQ登入的大體流程相同，但存在一些細節上的差異，下面我們來簡單實現一下）

準備工作

為了方便大家測試，博主在某寶租用了一個月的appid和appSecret

目錄結構

參考

1. api 定義api繫結的公共介面
2. config 微信的一些配置資訊
3. connect與服務提供商建立連線所需的一些類。

定義返回使用者資訊介面

public interface Weixin {
    WeixinUserInfo getUserInfo(String openId);
}

這裡我們看到相對於QQ的getUserInfo微信多了一個引數openId。這是因為微信文件中在OAuth2.0的認證流程示意圖

處理微信返回的access_token類(新增openid)

@Data
public class WeixinAccessGrant extends AccessGrant{

    private String openId;

    public WeixinAccessGrant() {
        super
 
("");
    }

    public WeixinAccessGrant(String accessToken, String scope, String refreshToken, Long expiresIn) {
        super(accessToken, scope, refreshToken, expiresIn);
    }
}

實現返回使用者資訊介面

public class WeiXinImpl extends AbstractOAuth2ApiBinding implements Weixin {

    /**
     * 獲取使用者資訊的url
     */
    private static final String WEIXIN_URL_GET_USER_INFO = "https://api.weixin.qq.com/sns/userinfo?openid=";

    private ObjectMapper objectMapper = new ObjectMapper();

    public WeiXinImpl(String accessToken) {
        super(accessToken, TokenStrategy.ACCESS_TOKEN_PARAMETER);
    }

    /**
     * 獲取使用者資訊
     *
     * @param openId
     * @return
     */
    @Override
    public WeixinUserInfo getUserInfo(String openId) {
        String url = WEIXIN_URL_GET_USER_INFO + openId;

        String result = getRestTemplate().getForObject(url, String.class);
        if(StringUtils.contains(result, "errcode")) {
            return null;
        }

        WeixinUserInfo userInfo = null;

        try{
            userInfo = objectMapper.readValue(result,WeixinUserInfo.class);
        }catch (Exception e){
            e.printStackTrace();
        }

        return userInfo;
    }

    /**
     * 使用utf-8 替換預設的ISO-8859-1編碼
     * @return
     */
    @Override
    protected List<HttpMessageConverter<?>> getMessageConverters() {
        List<HttpMessageConverter<?>> messageConverters = super.getMessageConverters();
        messageConverters.remove(0);
        messageConverters.add(new StringHttpMessageConverter(Charset.forName("UTF-8")));
        return messageConverters;
    }
}

與QQ獲取使用者資訊相比,微信的實現類中少了一步通過access_token獲取openid的請求。openid由自己定義的擴充套件類WeixinAccessGrant中獲取；

WeixinOAuth2Template處理微信返回的令牌資訊

@Slf4j
public class WeixinOAuth2Template extends OAuth2Template {

    private String clientId;

    private String clientSecret;

    private String accessTokenUrl;

    private static final String REFRESH_TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/refresh_token";

    public WeixinOAuth2Template(String clientId, String clientSecret, String authorizeUrl, String accessTokenUrl) {
        super(clientId, clientSecret, authorizeUrl, accessTokenUrl);
        setUseParametersForClientAuthentication(true);
        this.clientId = clientId;
        this.clientSecret = clientSecret;
        this.accessTokenUrl = accessTokenUrl;
    }

    /* (non-Javadoc)
     * @see org.springframework.social.oauth2.OAuth2Template#exchangeForAccess(java.lang.String, java.lang.String, org.springframework.util.MultiValueMap)
     */
    @Override
    public AccessGrant exchangeForAccess(String authorizationCode, String redirectUri,
                                         MultiValueMap<String, String> parameters) {

        StringBuilder accessTokenRequestUrl = new StringBuilder(accessTokenUrl);

        accessTokenRequestUrl.append("?appid="+clientId);
        accessTokenRequestUrl.append("&secret="+clientSecret);
        accessTokenRequestUrl.append("&code="+authorizationCode);
        accessTokenRequestUrl.append("&grant_type=authorization_code");
        accessTokenRequestUrl.append("&redirect_uri="+redirectUri);

        return getAccessToken(accessTokenRequestUrl);
    }

    public AccessGrant refreshAccess(String refreshToken, MultiValueMap<String, String> additionalParameters) {

        StringBuilder refreshTokenUrl = new StringBuilder(REFRESH_TOKEN_URL);

        refreshTokenUrl.append("?appid="+clientId);
        refreshTokenUrl.append("&grant_type=refresh_token");
        refreshTokenUrl.append("&refresh_token="+refreshToken);

        return getAccessToken(refreshTokenUrl);
    }

    @SuppressWarnings("unchecked")
    private AccessGrant getAccessToken(StringBuilder accessTokenRequestUrl) {

        log.info("獲取access_token, 請求URL: "+accessTokenRequestUrl.toString());

        String response = getRestTemplate().getForObject(accessTokenRequestUrl.toString(), String.class);

        log.info("獲取access_token, 響應內容: "+response);

        Map<String, Object> result = null;
        try {
            result = new ObjectMapper().readValue(response, Map.class);
        } catch (Exception e) {
            e.printStackTrace();
        }

        //返回錯誤碼時直接返回空
        if(StringUtils.isNotBlank(MapUtils.getString(result, "errcode"))){
            String errcode = MapUtils.getString(result, "errcode");
            String errmsg = MapUtils.getString(result, "errmsg");
            throw new RuntimeException("獲取access token失敗, errcode:"+errcode+", errmsg:"+errmsg);
        }

        WeixinAccessGrant accessToken = new WeixinAccessGrant(
                MapUtils.getString(result, "access_token"),
                MapUtils.getString(result, "scope"),
                MapUtils.getString(result, "refresh_token"),
                MapUtils.getLong(result, "expires_in"));

        accessToken.setOpenId(MapUtils.getString(result, "openid"));

        return accessToken;
    }

    /**
     * 構建獲取授權碼的請求。也就是引導使用者跳轉到微信的地址。
     */
    public String buildAuthenticateUrl(OAuth2Parameters parameters) {
        String url = super.buildAuthenticateUrl(parameters);
        url = url + "&appid="+clientId+"&scope=snsapi_login";
        return url;
    }

    public String buildAuthorizeUrl(OAuth2Parameters parameters) {
        return buildAuthenticateUrl(parameters);
    }

    /**
     * 微信返回的contentType是html/text，新增相應的HttpMessageConverter來處理。
     */
    protected RestTemplate createRestTemplate() {
        RestTemplate restTemplate = super.createRestTemplate();
        restTemplate.getMessageConverters().add(new StringHttpMessageConverter(Charset.forName("UTF-8")));
        return restTemplate;
    }
}

與QQ處理令牌類相比多了三個全域性變數並且複寫了exchangeForAccess方法。這是因為微信在通過code獲取access_token是傳遞的引數是appid和secret而不是標準的client_id和client_secret。

WeixinServiceProvider連線服務提供商

public class WeixinServiceProvider extends AbstractOAuth2ServiceProvider<Weixin> {

    /**
     * 微信獲取授權碼的url
     */
    private static final String WEIXIN_URL_AUTHORIZE = "https://open.weixin.qq.com/connect/qrconnect";
    /**
     * 微信獲取accessToken的url(微信在獲取accessToken時也已經返回openId)
     */
    private static final String WEIXIN_URL_ACCESS_TOKEN = "https://api.weixin.qq.com/sns/oauth2/access_token";

    public WeixinServiceProvider(String appId, String appSecret) {
        super(new WeixinOAuth2Template(appId, appSecret, WEIXIN_URL_AUTHORIZE, WEIXIN_URL_ACCESS_TOKEN));
    }

    @Override
    public Weixin getApi(String accessToken) {
        return new WeiXinImpl(accessToken);
    }
}

WeixinConnectionFactory連線服務提供商的工廠類

public class WeixinConnectionFactory extends OAuth2ConnectionFactory<Weixin> {

    /**
     * @param appId
     * @param appSecret
     */
    public WeixinConnectionFactory(String providerId, String appId, String appSecret) {
        super(providerId, new WeixinServiceProvider(appId, appSecret), new WeixinAdapter());
    }

    /**
     * 由於微信的openId是和accessToken一起返回的，所以在這裡直接根據accessToken設定providerUserId即可，不用像QQ那樣通過QQAdapter來獲取
     */
    @Override
    protected String extractProviderUserId(AccessGrant accessGrant) {
        if(accessGrant instanceof WeixinAccessGrant) {
            return ((WeixinAccessGrant)accessGrant).getOpenId();
        }
        return null;
    }

    /* (non-Javadoc)
     * @see org.springframework.social.connect.support.OAuth2ConnectionFactory#createConnection(org.springframework.social.oauth2.AccessGrant)
     */
    public Connection<Weixin> createConnection(AccessGrant accessGrant) {
        return new OAuth2Connection<Weixin>(getProviderId(), extractProviderUserId(accessGrant), accessGrant.getAccessToken(),
                accessGrant.getRefreshToken(), accessGrant.getExpireTime(), getOAuth2ServiceProvider(), getApiAdapter(extractProviderUserId(accessGrant)));
    }

    /* (non-Javadoc)
     * @see org.springframework.social.connect.support.OAuth2ConnectionFactory#createConnection(org.springframework.social.connect.ConnectionData)
     */
    public Connection<Weixin> createConnection(ConnectionData data) {
        return new OAuth2Connection<Weixin>(data, getOAuth2ServiceProvider(), getApiAdapter(data.getProviderUserId()));
    }

    private ApiAdapter<Weixin> getApiAdapter(String providerUserId) {
        return new WeixinAdapter(providerUserId);
    }

    private OAuth2ServiceProvider<Weixin> getOAuth2ServiceProvider() {
        return (OAuth2ServiceProvider<Weixin>) getServiceProvider();
    }

}

WeixinAdapter將微信api返回的資料模型適配Spring Social的標準模型

public class WeixinAdapter implements ApiAdapter<Weixin> {

    private String openId;

    public WeixinAdapter() {
    }

    public WeixinAdapter(String openId) {
        this.openId = openId;
    }

    @Override
    public boolean test(Weixin api) {
        return true;
    }

    @Override
    public void setConnectionValues(Weixin api, ConnectionValues values) {
        WeixinUserInfo userInfo = api.getUserInfo(openId);
        values.setProviderUserId(userInfo.getOpenid());
        values.setDisplayName(userInfo.getNickname());
        values.setImageUrl(userInfo.getHeadimgurl());
    }

    @Override
    public UserProfile fetchUserProfile(Weixin api) {
        return null;
    }

    @Override
    public void updateStatus(Weixin api, String message) {

    }
}

WeixinAuthConfig建立工廠和設定資料來源

@Configuration
public class WeixinAuthConfig extends SocialAutoConfigurerAdapter {

    @Autowired
    private DataSource dataSource;

    @Autowired
    private ConnectionSignUp myConnectionSignUp;

    @Override
    protected ConnectionFactory<?> createConnectionFactory() {
        return new WeixinConnectionFactory(DEFAULT_SOCIAL_WEIXIN_PROVIDER_ID, SecurityConstants.DEFAULT_SOCIAL_WEIXIN_APP_ID,
                SecurityConstants.DEFAULT_SOCIAL_WEIXIN_APP_SECRET);
    }

    @Override
    public UsersConnectionRepository getUsersConnectionRepository(ConnectionFactoryLocator connectionFactoryLocator) {
        JdbcUsersConnectionRepository repository = new JdbcUsersConnectionRepository(dataSource,
                connectionFactoryLocator, Encryptors.noOpText());
        if (myConnectionSignUp != null) {
            repository.setConnectionSignUp(myConnectionSignUp);
        }
        return repository;
    }

    /**
     * /connect/weixin POST請求,繫結微信返回connect/weixinConnected檢視
     * /connect/weixin DELETE請求,解綁返回connect/weixinConnect檢視
     * @return
     */
    @Bean({"connect/weixinConnect", "connect/weixinConnected"})
    @ConditionalOnMissingBean(name = "weixinConnectedView")
    public View weixinConnectedView() {
        return new SocialConnectView();
    }

}

社交登入配置類

由於社交登入都是通過SocialAuthenticationFilter過濾器攔截的，如果 上一章 已經配置過，則本章不需要配置。

效果如下：

程式碼下載