multiple send from server to client python

Question

First I am sending the requested file from the server to the client and after that I want to send the computed sha of the file from the server to the client, so that the cli

Answer 1

You should redesign a bit how your app works:

• First the servers sends to the client the file size
• The client reads the file size (converts it to a number) and notifies the server (sends "OK" to the server for example)
• The server reads the "OK" from the client and starts to send the file contents (preferably in smaller chunks)
• The client keeps reading data until either it reads exactly "file size" bytes or error occurs
• If no error occurred the client computes the hash of the file that it just received and sends it to the server
• The server reads the hash from client and compares with the one of its local file - if they match it sends "OK" to the client "ERROR" otherwise
• The client reads the response from server: if "ERROR" is received the file is deleted

Answer 2

A TCP stream needs to be formatted in both ends, since it is a stream not packets. I suppose you could look for a nullbyte ('\x00') which should signal end of file.