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DataFlex Examples

ASN.1
Amazon S3
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Base64
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Box
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curl
eBay

 

 

 

(DataFlex) URL Signing for Google Maps API

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

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoCrypt
    Boolean iSuccess
    String sSig
    String sTemp1

    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End

    //  Any string argument automatically begins the 30-day trial.
    Get ComUnlockComponent Of hoCrypt "Anything for 30-day trial." To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  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.
    Set ComEncodingMode Of hoCrypt To "modBase64"

    //  Set the hash algorithm to sha-1
    Set ComHashAlgorithm Of hoCrypt To "sha-1"

    //  Set the HMAC key (this is the private key provided by Google)
    Send ComSetHmacKeyEncoded To hoCrypt "vNIXE0xscrmjlyV-12Nj_BvUPaw=" "modBase64"

    //  Compute the URL signature
    Get ComHmacStringENC Of hoCrypt "/maps/api/geocode/json?address=New+York&sensor=false&client=clientID" To sSig

    //  The result should be KrU1TzVQM7Ur0i8i7K3huiw3MsA=
    Showln sSig


End_Procedure

 

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