Fastapi simply implements temporary download links

 1# Note that the new version of itsdangerous is URLSafeTimedSerializer
 2from itsdangerous import URLSafeTimedSerializer as Serializer
 3from itsdangerous import BadSignature, SignatureExpired
 4from fastapi.responses import FileResponse
 5
 6@app.get("/api/get_file/{token}") # token is passed through path parameter
 7async def get_file(token):
 8     s = Serializer("your secret key") # Your key, you should know, the token I developed directly using the public account
 9     try:
10         # max_age = 60 * 10 The identification token is valid within ten minutes. If it exceeds, SignatureExpired will be triggered, which is very important! ! !
11         to_user = s.loads(token, max_age=60 * 10)["to_user"]
12     except SignatureExpired:
13         logger.info("Token timed out, verification failed")
14         return {"status": "fail", "data": "expired token(token timeout, verification failed)"} # Information is provided in both Chinese and English, with good intentions😄, there may be readers who are not good at English
15     except BadSignature:
16         logger.info("Invalid token")
17         return {"status": "fail", "data": "bad token(invalid token)"}
18     print("to_user", to_user)
19     # The front is the path of the file to be downloaded, and the back is the file name after next week. filename is very important, otherwise it will not be friendly enough. If you don’t believe me, try removing it.
20     # Currently only one file is provided for download, so it is hard-coded.
21     return FileResponse("api/downloads/InstMsiW.exe", filename="InstMsiW.exe")

 1### Omit 10,000 lines of code here ###
 2# It means that if the public account user sends "Open Sesame", a temporary download address will be replied to the user.
 3if Content == "Open Sesame":
 4     s = Serializer("your secret key") # Your key, you should know, the token I developed directly using the public account
 5     token = s.dumps({"to_user": toUser}) # Generally, a unique token is used for dumps. Dumps can be simply understood as encryption, and loads are analogous to decryption.
 6     logger.info("Start sending download link")
 7     print("token:", token)
 8     content = f"InstMsiw temporary download address (please use a browser to open it, the download link will be valid within 10 minutes): https://stock.mephisto.cc/api/get_file/{token}"
 9     replyMsg = reply.TextMsg(toUser, fromUser, content)
10     return replyMsg.send()