feat: 对话解析优化

request/api/AgentChatStream.js

@@ -63,7 +63,7 @@ function agentChatStream(params, onChunk) {
             const base64 = uni.arrayBufferToBase64(res.data);
             let data = '';
             try {
-                data = decodeURIComponent(escape(atob(base64)));
+                data = decodeURIComponent(escape(weAtob(base64)));
             } catch (e) {
                 // 某些平台可能不支持 atob，可以直接用 base64
                 data = base64;
@@ -77,6 +77,59 @@ function agentChatStream(params, onChunk) {
     });
 }
 
+// window.atob兼容性处理
+const weAtob = (string) => {
+  const b64re =
+    /^(?:[A-Za-z\d+/]{4})*?(?:[A-Za-z\d+/]{2}(?:==)?|[A-Za-z\d+/]{3}=?)?$/;
+  const b64 =
+    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+
+  // 去除空白字符
+  string = String(string).replace(/[\t\n\f\r ]+/g, '');
+
+  // 验证 Base64 编码
+  if (!b64re.test(string)) {
+    throw new TypeError(
+      // eslint-disable-next-line quotes
+      "Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded."
+    );
+  }
+
+  // 填充字符
+  string += '=='.slice(2 - (string.length & 3));
+
+  let bitmap,
+    result = '',
+    r1,
+    r2,
+    i = 0;
+
+  for (; i < string.length;) {
+    bitmap =
+      (b64.indexOf(string.charAt(i++)) << 18) |
+      (b64.indexOf(string.charAt(i++)) << 12) |
+      ((r1 = b64.indexOf(string.charAt(i++))) << 6) |
+      (r2 = b64.indexOf(string.charAt(i++)));
+
+    if (r1 === 64) {
+      result += String.fromCharCode((bitmap >> 16) & 255);
+    } else if (r2 === 64) {
+      result += String.fromCharCode(
+        (bitmap >> 16) & 255,
+        (bitmap >> 8) & 255
+      );
+    } else {
+      result += String.fromCharCode(
+        (bitmap >> 16) & 255,
+        (bitmap >> 8) & 255,
+        bitmap & 255
+      );
+    }
+  }
+  return result;
+};
+
+
 // 解析SSE分段数据
 function parseSSEChunk(raw) {
     // 拆分为多段