Final answer:
To develop a simple web server on port 40000, use Python. For GET, check if the file exists in the current directory. For POST, save the binary file in the current working directory.
Step-by-step explanation:
To develop a simple web server that works on port 40000 and supports the HTTP GET and POST commands, you can use a programming language like Python.
For the HTTP GET command, you need to listen for incoming requests on port 40000 and parse the requested file path. If the file exists in the current directory, you can return its contents with an HTTP 200 response. If the file doesn't exist, you should return an HTTP 404 error.
For the HTTP POST command, you need to listen for incoming requests on port 40000 as well. When a POST request is received, you can save the binary file in the current working directory.