git init

Server/plugs/service/RotationVerificationService.ts

@@ -0,0 +1,100 @@
+import Logger from "@plugs/Logger";
+import SettingConfig from "@plugs/Settingconfig";
+import RedisConnection from "@plugs/database/RedisConnection";
+
+class RotationVerificationService{
+
+    constructor(){
+        Logger.info('[Service][RotationVerificationService] 旋转图像验证服务已启动')
+    }
+
+    async #get(session: string){
+        // 通过session获取单个存储对象，无需手动调用
+        try {
+            let result:  = await RedisConnection.get('RotationVerificationService:' + session);
+            return JSON.parse(result);// 由于RVService的值为JSON字符串，因此需要解析
+        } catch (error) {
+            // 不一定是数据库出错，有可能是已过期
+            Logger.warn(`[Service][RotationVerificationService] 获取session[${session}]时发生错误：${error}`);
+            return undefined;
+        }
+    }
+
+    async #remove(session: string){
+        // 删除session，无需手动调用
+        let res = await RedisConnection.del('RotationVerificationService:' + session);
+        if(!res)
+            Logger.err(`[Service][RotationVerificationService] 删除session[${session}]失败`);
+    }
+    
+    /**
+     * 将session和角度信息存储，便于后续验证
+     * @param {*} session
+     * @param {*} rotateDeg
+     */
+    async add(session: string,rotateDeg: number){
+        let result = {
+            rotateDeg: rotateDeg,
+            tryCount: 0,
+            isPassed: false
+        }
+        let res = await RedisConnection.set('RotationVerificationService:' + session, JSON.stringify(result));
+        if(!res)
+        {
+            Logger.err(`[Service][RotationVerificationService] 存储session[${session}]失败`);
+            return false;
+        }
+        // 设置过期时间
+        RedisConnection.expire('RotationVerificationService:' + session, this.ExpriedTimeSec);
+        return true;
+    }
+
+    /**
+     * 查询该session是否已通过验证，使用后自动实效
+     * @param {*} session 
+     * @returns {Boolean} 验证通过结果
+     */
+    async isPassed(session){
+        // 通过后，有效期60s
+        let result = await this.#get(session);
+        if(!result)
+            return false;
+        let res = result.isPassed;
+        if(res)
+            // 验证通过，该session失效，防止重复验证
+            this.#remove(session);
+        return res;
+    }
+
+    /**
+     * 检查session和角度信息
+     * @param {*} session 
+     * @param {*} rotateDeg 
+     * @returns {Number} 0,已过期(或未加入验证池) -1,超过最大尝试次数 1,验证通过 -2,角度差异过大
+     */
+    async check(session,rotateDeg){
+        let result = await this.#get(session);
+        if(!result)
+            return 0;// 已过期(或未加入验证池)
+        if(Math.abs(result.rotateDeg - rotateDeg) <= this.AllowMaxAngleDiff)
+        {                                   
+            // 验证通过，标识为已通过，并设定有效期为60s
+            result.isPassed = true;
+            await RedisConnection.del('RotationVerificationService:' + session);
+            await RedisConnection.set('RotationVerificationService:' + session, JSON.stringify(result));
+            RedisConnection.expire('RotationVerificationService:' + session, this.ExpriedTimeSec);
+            return 1;
+        }
+        result.tryCount++;// 浪费一次尝试次数
+        if(result.tryCount >= this.AllowMaxTryCount)
+        {
+            this.#remove(session);
+            return -1;// 超过最大尝试次数
+        }
+        // 保存尝试次数
+        RedisConnection.set('RotationVerificationService:' + session, JSON.stringify(result));
+        return -2;// 角度差异过大
+    }
+}
+let _RotationVerificationService = new RotationVerificationService();
+module.exports.RotationVerificationService = _RotationVerificationService;