chore: adjust dir structure

src/langbot/libs/wechatpad_api/api/downloadpai.py

@@ -0,0 +1,30 @@
+from libs.wechatpad_api.util.http_util import post_json
+import httpx
+import base64
+
+
+class DownloadApi:
+    def __init__(self, base_url, token):
+        self.base_url = base_url
+        self.token = token
+
+    def send_download(self, aeskey, file_type, file_url):
+        json_data = {'AesKey': aeskey, 'FileType': file_type, 'FileURL': file_url}
+        url = self.base_url + '/message/SendCdnDownload'
+        return post_json(url, token=self.token, data=json_data)
+
+    def get_msg_voice(self, buf_id, length, new_msgid):
+        json_data = {'Bufid': buf_id, 'Length': length, 'NewMsgId': new_msgid, 'ToUserName': ''}
+        url = self.base_url + '/message/GetMsgVoice'
+        return post_json(url, token=self.token, data=json_data)
+
+    async def download_url_to_base64(self, download_url):
+        async with httpx.AsyncClient() as client:
+            response = await client.get(download_url)
+
+            if response.status_code == 200:
+                file_bytes = response.content
+                base64_str = base64.b64encode(file_bytes).decode('utf-8')  # 返回字符串格式
+                return base64_str
+            else:
+                raise Exception('获取文件失败')