Sign S3 URL

sign-s3-url.py

#!/usr/bin/env python

# http://boto3.readthedocs.org/en/latest/reference/services/rds.html
import boto3
import sys, getopt

bucket = None
file_path = None
timeout_seconds = 3600

def print_usage():
    print """
    s3-temp-url.py -b bucket -f file-path -t [ timeout-seconds ]

    Prints out a temporary url to S3 resource that expires in timeout-seconds.
    bucket and file-path are required.
    timeout-seconds defaults to 3600 -- one hour.

    http://boto3.readthedocs.org/en/latest/reference/services/rds.html"""
    sys.exit(2)

def parse_args(argv):
    global bucket, timeout_seconds, file_path
    try:
        opts, args = getopt.getopt(
            argv,
            "h:b:f:t:",
            ["help=","bucket=","file-path=","timeout-seconds="])
    except getopt.GetoptError:
        print_usage()
    for opt, arg in opts:
        if opt in ("-h", "--help"):
            print_usage()
        elif opt in ("-b", "--bucket"):
            bucket = arg
        elif opt in ("-t", "--timeout-seconds"):
            timeout_seconds = int(arg)
        elif opt in ("-f", "--file-path"):
            file_path = arg
    if (bucket is None) or (file_path is None):
        print_usage()

def print_tmp_url():
    client = boto3.client('s3')
    args = {
        'ClientMethod': 'get_object',
        'Params': { 'Bucket': bucket, 'Key': file_path },
        'ExpiresIn': timeout_seconds
        }
    # print args
    response = client.generate_presigned_url(**args);
    msg = '''
    This url will expire in {timeout_seconds} seconds.

    {the_url}
    '''
    print msg.format(timeout_seconds=timeout_seconds, the_url=response)

if __name__ == "__main__":
    parse_args(sys.argv[1:])
    print_tmp_url()