(Python) URL Signing for Google Maps API

Demonstrates how to sign a URL for the Google Maps API.

 Chilkat Python Module Downloads for Windows, Linux, and MAC OS X

import sys
import chilkat

crypt = chilkat.CkCrypt2()

#  Any string argument automatically begins the 30-day trial.
success = crypt.UnlockComponent("Anything for 30-day trial.")
if (success != True):
    print crypt.lastErrorText()
    sys.exit()

#  The output will be modified Base64.
#  Modified Base64 for URLs replaces the '+' and '/' characters
#  of standard Base64 with '-' and '_' respectively, so that these
#  Base64 signatures no longer need to be URL-encoded.
crypt.put_EncodingMode("modBase64")

#  NOTE: At the time of this writing, the "modBase64" encoding mode is
#  available in the pre-release build only.  Send email to
#  support@chilkatsoft.com if you need a pre-release.  This feature will be
#  included in the next official release.

#  Set the hash algorithm to sha-1
crypt.put_HashAlgorithm("sha-1")

#  Set the HMAC key (this is the private key provided by Google)
crypt.SetHmacKeyEncoded("vNIXE0xscrmjlyV-12Nj_BvUPaw=","modBase64")

#  Compute the URL signature
sig = crypt.hmacStringENC("/maps/api/geocode/json?address=New+York&sensor=false&client=clientID")

#  The result should be KrU1TzVQM7Ur0i8i7K3huiw3MsA=
print sig