POST Request and File Upload Example

import os
import sys

def main():

#if the file 'da.ta' does not exist, this must mean that we recieved a GET request, which, for this example, we do not allow.
if not os.path.isfile("da.ta"):
print("Usage: POST a file's raw bytes to https://fech.space/file-upload-ex/")
sys.exit(0)

#Let's attempt to open 'da.ta' and dump it into a variable.
with open("da.ta", 'rb') as f:
data_bytes = f.read()

#File exists at this point, but if it is empty, then there is no point to sending anything back. End the script to let the user know. Remember to start the output with "Error:" for plain-text response!
if len(data_bytes) == 0:
fail("Error: received an empty POST body.")

#Output the file's contents.
print(data_bytes)

#No need to delete the file because the sandbox gets wiped and restarts after every utility finishes.

if __name__ == "__main__":
main()