Configure Google Service Account Authentication for REST

See more REST Examples

Demonstrates Rest.SetAuthGoogle, which associates an AuthGoogle provider so Chilkat supplies a Google OAuth 2.0 bearer token on each request. The provider is configured with a service account JSON key and the required OAuth scope.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkAuthGoogle.pb"
IncludeFile "CkRest.pb"

Procedure ChilkatExample()

    success.i = 0

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    bTls.i = 1
    bAutoReconnect.i = 1
    success = CkRest::ckConnect(rest,"example.com",443,bTls,bAutoReconnect)
    If success = 0
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    ;  Configure Google service-account authentication.  Load the service account JSON key and set the
    ;  required OAuth scope(s).
    gAuth.i = CkAuthGoogle::ckCreate()
    If gAuth.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    sbJsonKey.i = CkStringBuilder::ckCreate()
    If sbJsonKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    bLoaded.i = CkStringBuilder::ckLoadFile(sbJsonKey,"qa_data/service_account.json")
    If bLoaded <> 1
        Debug "Failed to load the service account JSON key."
        CkRest::ckDispose(rest)
        CkAuthGoogle::ckDispose(gAuth)
        CkStringBuilder::ckDispose(sbJsonKey)
        ProcedureReturn
    EndIf

    jsonKey.s = CkStringBuilder::ckGetAsString(sbJsonKey)
    If CkStringBuilder::ckLastMethodSuccess(sbJsonKey) = 0
        Debug CkStringBuilder::ckLastErrorText(sbJsonKey)
        CkRest::ckDispose(rest)
        CkAuthGoogle::ckDispose(gAuth)
        CkStringBuilder::ckDispose(sbJsonKey)
        ProcedureReturn
    EndIf

    CkAuthGoogle::setCkJsonKey(gAuth, jsonKey)

    ;  A space-delimited list of the requested permissions.
    CkAuthGoogle::setCkScope(gAuth, "https://www.googleapis.com/auth/cloud-platform")

    ;  Associate the provider so Chilkat supplies a Google bearer token on each request.
    success = CkRest::ckSetAuthGoogle(rest,gAuth)
    If success = 0
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkAuthGoogle::ckDispose(gAuth)
        CkStringBuilder::ckDispose(sbJsonKey)
        ProcedureReturn
    EndIf

    responseText.s = CkRest::ckFullRequestNoBody(rest,"GET","/storage/v1/b?project=my-project")
    If CkRest::ckLastMethodSuccess(rest) = 0
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkAuthGoogle::ckDispose(gAuth)
        CkStringBuilder::ckDispose(sbJsonKey)
        ProcedureReturn
    EndIf

    Debug responseText


    CkRest::ckDispose(rest)
    CkAuthGoogle::ckDispose(gAuth)
    CkStringBuilder::ckDispose(sbJsonKey)


    ProcedureReturn
EndProcedure