后端加入Redis、旋转图片验证接口

Server/src/APIs/GetCaptcha.ts

@@ -0,0 +1,36 @@
+import fs from "fs";
+import { API } from "../Plugs/API/API";
+import ServerStdResponse from "../ServerStdResponse";
+import captchaSession from "../Plugs/Service/captchaSession";
+import path from "path";
+import sharp from "sharp";
+import crypto from 'crypto'
+
+// 获取人机验证图片及标识符
+class GetCaptcha extends API {
+    constructor() {
+        super('GET', '/captcha');
+    }
+
+    public async onRequset(data: any, res: any) {
+        const imgsPath = path.join(__dirname, '../assets/captchaImgs');
+        const fileList = fs.readdirSync(imgsPath)
+        const imgPath = path.join(imgsPath, fileList[Math.floor(Math.random() * fileList.length)]);
+        const rotateDeg = Math.floor(Math.random() * 240) + 60;
+        const img = Buffer.from(await sharp(imgPath).rotate(-rotateDeg).toBuffer()).toString('base64')
+        const session = crypto.createHash('md5').update(`${Math.random()} ${Date.now()}`).digest('hex');
+        if (await captchaSession.add(session, rotateDeg)) {
+            return res.json({
+                ...ServerStdResponse.OK, data: {
+                    img: img,
+                    session: session,
+                    imgPreStr: 'data:image/jpeg;base64,'
+                }
+            });
+        } else {
+            return res.json(ServerStdResponse.SERVER_ERROR)
+        }
+    }
+}
+
+export default GetCaptcha;