feat: add OSS uploader for Tingwu ASR

backend/oss_uploader.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+"""
+OSS 上传工具 - 用于阿里听悟音频上传
+"""
+
+import os
+import uuid
+from datetime import datetime, timedelta
+import oss2
+
+class OSSUploader:
+    def __init__(self):
+        self.access_key = os.getenv("ALI_ACCESS_KEY")
+        self.secret_key = os.getenv("ALI_SECRET_KEY")
+        # 使用杭州区域，听悟服务在杭州
+        self.endpoint = "oss-cn-hangzhou.aliyuncs.com"
+        self.bucket_name = os.getenv("ALI_OSS_BUCKET", "insightflow-audio")
+        
+        if not self.access_key or not self.secret_key:
+            raise ValueError("ALI_ACCESS_KEY and ALI_SECRET_KEY must be set")
+        
+        self.auth = oss2.Auth(self.access_key, self.secret_key)
+        self.bucket = oss2.Bucket(self.auth, self.endpoint, self.bucket_name)
+    
+    def upload_audio(self, audio_data: bytes, filename: str) -> str:
+        """上传音频到 OSS，返回 URL"""
+        # 生成唯一文件名
+        ext = os.path.splitext(filename)[1] or ".wav"
+        object_name = f"audio/{datetime.now().strftime('%Y%m%d')}/{uuid.uuid4().hex}{ext}"
+        
+        # 上传文件
+        self.bucket.put_object(object_name, audio_data)
+        
+        # 生成临时访问 URL (1小时有效)
+        url = self.bucket.sign_url('GET', object_name, 3600)
+        return url, object_name
+    
+    def delete_object(self, object_name: str):
+        """删除 OSS 对象"""
+        self.bucket.delete_object(object_name)
+
+# 单例
+_oss_uploader = None
+
+def get_oss_uploader() -> OSSUploader:
+    global _oss_uploader
+    if _oss_uploader is None:
+        _oss_uploader = OSSUploader()
+    return _oss_uploader