Initial commit

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/components/decrypt-img/tool.js

@@ -0,0 +1,60 @@
+export const decryptTool = {
+  decryptKey: "2019ysapp7527",
+  cachedBlobs: {},
+  // 并发控制
+  maxConcurrency: 10,
+  activeCount: 0,
+  queue: [],
+  /**
+   * @description 图片解密
+   * @param url 需要解密的url
+   * @returns  解密过后的图片链接
+   */
+  async imgDecypt(url) {
+    return new Promise((resolve, reject) => {
+      const task = async () => {
+        try {
+          const r = await fetch(url);
+          const rb = await r.arrayBuffer();
+          const blobUrl = this.imgEncrypt(rb);
+          resolve(blobUrl);
+        } catch (e) {
+          reject(e);
+        } finally {
+          // 任务完成，减少计数并尝试启动下一个队列任务
+          this.activeCount = Math.max(0, this.activeCount - 1);
+          if (this.queue.length > 0) {
+            const next = this.queue.shift();
+            this.activeCount++;
+            next();
+          }
+        }
+      };
+
+      if (this.activeCount < this.maxConcurrency) {
+        this.activeCount++;
+        task();
+      } else {
+        this.queue.push(task);
+      }
+    });
+  },
+  /**
+   * 图片解密
+   * @param buffer buffer
+   * @returns
+   */
+  imgEncrypt(buffer) {
+    const bytes = new Uint8Array(buffer);
+    const encoder = new TextEncoder();
+    const KEY = encoder.encode(this.decryptKey);
+    for (let i = 0; i < 100; i++) {
+      bytes[i] ^= KEY[i % KEY.length];
+    }
+    const blob = new Blob([bytes], {
+      type: "image/png",
+    });
+    const url = URL.createObjectURL(blob);
+    return url;
+  },
+};