Visual FoxPro

URL Signing for Google Maps API

See more Encryption Examples

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

LOCAL loCrypt
LOCAL lcSig

* This example assumes the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

loCrypt = CreateObject('Chilkat.Crypt2')

* 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.
loCrypt.EncodingMode = "modBase64"

* Set the hash algorithm to sha-1
loCrypt.HashAlgorithm = "sha-1"
loCrypt.MacAlgorithm = "hmac"

* Set the HMAC key (this is the private key provided by Google)
loCrypt.SetMacKeyEncoded("vNIXE0xscrmjlyV-12Nj_BvUPaw=","modBase64")

* Compute the URL signature
lcSig = loCrypt.MacStringENC("/maps/api/geocode/json?address=New+York&sensor=false&client=clientID")

* The result should be KrU1TzVQM7Ur0i8i7K3huiw3MsA=
? lcSig

RELEASE loCrypt