submit.py

#!/usr/bin/python
import os.path
import subprocess
import sys
import urllib

KEY_FILE = "submit.token"

def main(filename):
    # Prompt for key if missing
    if not os.path.exists(KEY_FILE):
        print "Please visit http://css.csail.mit.edu/6.858/2014/labs/handin.html"
        print "and enter your API key."
        key = raw_input("Key: ").strip()
        with open(KEY_FILE, "w") as f:
            f.write(key + "\n")
        print "API key written to %s" % KEY_FILE

    # Read the key.
    with open(KEY_FILE) as f:
        key = f.read().strip()

    # Shell out to curl. urllib2 doesn't deal with multipart attachments. Throw
    # away the output; you just get a random HTML page.
    with open("/dev/null", "a") as null:
        subprocess.check_call(["curl", "-f",
                               "-F", "file=@%s" % filename,
                               "-F", "key=%s" % key,
                               "http://6858.scripts.mit.edu/submit/handin.py/upload"],
                              stdout=null, stderr=null)
    print "Submitted %s." % filename
    print "Please visit http://css.csail.mit.edu/6.858/2014/labs/handin.html"
    print "to verify the upload."

if __name__ == "__main__":
    if len(sys.argv) < 2:
        print "Usage: %s TARBALL" % sys.argv[0]
        sys.exit(1)
    main(sys.argv[1])