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@@ -22,8 +22,8 @@
   - [√ 钉钉登录](oauth/dingtalk.md)
   - [√ 开源中国登录](oauth/oschina.md)
   - [淘宝登录](oauth/taobao.md)
-  - [Google登录](oauth/google.md)
-  - [Facebook登录](oauth/facebook.md)
+  - [√ Google登录](oauth/google.md)
+  - [√ Facebook登录](oauth/facebook.md)
   - [抖音登录](oauth/douyin.md)
   - [√ 领英登录](oauth/linkedin.md)
   - [微软登录](oauth/microsoft.md)
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@@ -0,0 +1,172 @@
+## 1. 申请应用
+
+### 1.1 创建第三方授权应用
+
+1. 登录 Facebook 开发者中心：[Facebook 开发者中心](https://developers.facebook.com/)
+2. 进入“我的应用”管理页面
+3. 点击“添加新应用”，在弹窗中选择“用于其他用途”    
+![](doc/media/oauth/f5bf4cd3.png)    
+4. 按照提示，创建应用编号    
+![](doc/media/oauth/065ebc6b.png)
+5. 在应用详情页面，选择“Facebook 登录”    
+![](doc/media/oauth/658dcf45.png)    
+6. 配置“Facebook 登录”的回调地址
+![](doc/media/oauth/f3d0395a.png)
+7. 获取`Client ID`和`Client Secret`
+点击左侧菜单“设置 - 基本”即可看到认证密钥
+![](doc/media/oauth/a2efba1a.png)
+
+
+记录以下三个信息：`Client ID`、`Client Secret`和`回调地址`，后面我们会用到。
+
+**重要提示：“应用密钥”可保护你应用程序的安全，因此请确保其不会泄露！也不要与任何人共享你的“应用密钥”！！！**
+
+## 2. 集成JustAuth
+
+### 2.1 引入依赖
+
+```xml
+<dependency>
+  <groupId>me.zhyd.oauth</groupId>
+  <artifactId>JustAuth</artifactId>
+  <version>${latest.version}</version>
+</dependency>
+```
+
+`${latest.version}`表示当前最新的版本，可以在[这儿](https://github.com/justauth/JustAuth/releases)获取最新的版本信息。
+
+### 2.2 创建Request
+
+```java
+AuthRequest authRequest = new AuthFacebookRequest(AuthConfig.builder()
+                .clientId("Client ID")
+                .clientSecret("Client Secret")
+                .redirectUri("应用回调地址")
+                // 针对国外平台配置代理
+                .httpConfig(HttpConfig.builder()
+                        .timeout(15000)
+                        // host 和 port 请修改为开发环境的参数
+                        .proxy(new Proxy(Proxy.Type.HTTP, new InetSocketAddress("127.0.0.1", 10080)))
+                        .build())
+                .build());
+```
+
+### 2.3 生成授权地址
+
+我们可以直接使用以下方式生成第三方平台的授权链接：
+```java
+String authorizeUrl = authRequest.authorize(AuthStateUtils.createState());
+```
+这个链接我们可以直接后台重定向跳转，也可以返回到前端后，前端控制跳转。前端控制的好处就是，可以将第三方的授权页嵌入到iframe中，适配网站设计。
+
+
+### 2.4 以上完整代码如下
+
+```java
+import me.zhyd.oauth.config.AuthConfig;
+import me.zhyd.oauth.request.AuthFacebookRequest;
+import me.zhyd.oauth.model.AuthCallback;
+import me.zhyd.oauth.request.AuthRequest;
+import me.zhyd.oauth.utils.AuthStateUtils;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.Proxy;
+
+
+@RestController
+@RequestMapping("/oauth")
+public class RestAuthController {
+
+    @RequestMapping("/render")
+    public void renderAuth(HttpServletResponse response) throws IOException {
+        AuthRequest authRequest = getAuthRequest();
+        response.sendRedirect(authRequest.authorize(AuthStateUtils.createState()));
+    }
+
+    @RequestMapping("/callback")
+    public Object login(AuthCallback callback) {
+        AuthRequest authRequest = getAuthRequest();
+        return authRequest.login(callback);
+    }
+
+    private AuthRequest getAuthRequest() {
+        return new AuthFacebookRequest(AuthConfig.builder()
+                .clientId("Client ID")
+                .clientSecret("Client Secret")
+                .redirectUri("回调地址")
+                // 针对国外平台配置代理
+                .httpConfig(HttpConfig.builder()
+                        .timeout(15000)
+                        // host 和 port 请修改为开发环境的参数
+                        .proxy(new Proxy(Proxy.Type.HTTP, new InetSocketAddress("127.0.0.1", 10080)))
+                        .build())
+                .build());
+    }
+}
+```
+授权链接访问成功后会看到以下页面内容：
+
+![](doc/media/oauth/0df639e4.png)
+
+点击“连接”即可完成百度的 OAuth 登录。
+
+## 3. 授权结果
+
+注：数据已脱敏
+
+```json
+{
+    "code":2000,
+    "data":{
+        "avatar":"https://platform-lookaside.fbsbx.com/platform/profilepic/?asid=27692792&width=400&ext=1595947235&hash=AeS4-5s-I7w4xQq6",
+        "gender":"UNKNOWN",
+        "nickname":"张亚东",
+        "rawUserInfo":{
+            "name":"张亚东",
+            "id":"27692792",
+            "picture":{
+                "data":{
+                    "is_silhouette":false,
+                    "width":480,
+                    "url":"https://platform-lookaside.fbsbx.com/platform/profilepic/?asid=27692792&width=400&ext=1595947235&hash=AeS4-5s-I7w4xQq6",
+                    "height":480
+                }
+            }
+        },
+        "source":"FACEBOOK",
+        "token":{
+            "accessToken":"",
+            "expireIn":5183884,
+            "tokenType":"bearer"
+        },
+        "username":"张亚东",
+        "uuid":"27692792"
+    }
+}
+
+```
+
+## 3. 推荐
+
+官方推荐使用 [JustAuth-demo](https://github.com/justauth/JustAuth-demo) 示例项目进行测试。
+
+使用步骤：
+1. clone： [https://github.com/justauth/JustAuth-demo.git](https://github.com/justauth/JustAuth-demo.git)
+2. 将上面申请的应用信息填入到`RestAuthController#getAuthRequest`方法的对应位置中：
+![](doc/media/oauth/e1a40945.png)
+3. 启动项目，访问 [http://localhost:8443](http://localhost:8443)
+4. 选择对应的平台进行授权登录
+![](doc/media/oauth/da2bc692.png)
+5. 登录完成后，可以访问[http://localhost:8443/users](http://localhost:8443/users)查看已授权的用户
+![](doc/media/oauth/dbe6bcae.png)
+
+注：
+1. 如果直接使用 JustAuth-demo 项目进行测试，那么在配置测试应用的“回调地址”时要严格按照以下格式配置：`http://localhost:8443/oauth/callback/{平台名}`
+2. 平台名参考 `JustAuthPlatformInfo` 枚举类 `names`
+
+