(DataFlex) Download Google Contact Photo

Demonstrates how to download Google Contact's photo.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoJsonToken
    Boolean iSuccess
    Variant vGAuth
    Handle hoGAuth
    Handle hoRest
    Boolean iBAutoReconnect
    Handle hoSbPath
    String sContactId
    Integer iNumReplacements
    Variant vImageData
    Handle hoImageData
    Handle hoSbResponseBody
    Handle hoSbContentType
    String sTemp1
    Integer iTemp1
    Boolean bTemp1

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

    // --------------------------------------------------------------------------------------------------------
    // Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
    // Once connected, the REST object may be re-used for many REST API calls.
    // (It's a good idea to put the connection setup code in a separate function/subroutine.)
    // --------------------------------------------------------------------------------------------------------

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // saved by this example: Get Google Contacts OAuth2 Access Token

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonToken
    If (Not(IsComObjectCreated(hoJsonToken))) Begin
        Send CreateComObject of hoJsonToken
    End
    Get ComLoadFile Of hoJsonToken "qa_data/tokens/googleContacts.json" To iSuccess
    If (iSuccess <> True) Begin
        Showln "Failed to load googleContacts.json"
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatAuthGoogle)) To hoGAuth
    If (Not(IsComObjectCreated(hoGAuth))) Begin
        Send CreateComObject of hoGAuth
    End
    Get ComStringOf Of hoJsonToken "access_token" To sTemp1
    Set ComAccessToken Of hoGAuth To sTemp1

    Get Create (RefClass(cComChilkatRest)) To hoRest
    If (Not(IsComObjectCreated(hoRest))) Begin
        Send CreateComObject of hoRest
    End

    // Connect using TLS.
    Move True To iBAutoReconnect
    Get ComConnect Of hoRest "www.google.com" 443 True iBAutoReconnect To iSuccess

    // Provide the authentication credentials (i.e. the access token)
    Get pvComObject of hoGAuth to vGAuth
    Get ComSetAuthGoogle Of hoRest vGAuth To iSuccess

    // ----------------------------------------------
    // OK, the REST connection setup is completed..
    // ----------------------------------------------

    // To get the photo, send the following:

    // 	GET /m8/feeds/photos/media/default/contactId

    Get ComAddHeader Of hoRest "GData-Version" "3.0" To iSuccess

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbPath
    If (Not(IsComObjectCreated(hoSbPath))) Begin
        Send CreateComObject of hoSbPath
    End
    // Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
    Move "1ea2e4fe0ef24e09" To sContactId
    Get ComSetString Of hoSbPath "/m8/feeds/photos/media/default/{contactId}" To iSuccess
    Get ComReplace Of hoSbPath "{contactId}" sContactId To iNumReplacements

    Get Create (RefClass(cComChilkatBinData)) To hoImageData
    If (Not(IsComObjectCreated(hoImageData))) Begin
        Send CreateComObject of hoImageData
    End
    Get ComGetAsString Of hoSbPath To sTemp1
    Get pvComObject of hoImageData to vImageData
    Get ComFullRequestNoBodyBd Of hoRest "GET" sTemp1 vImageData To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoRest To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // A 404 response indicates the contact has no photo.
    // (We could've first fetched the contact information, parsed out the 
    // photo etag, and then if no photo etag existed, we'd know the contact has no
    // photo.  Or... we can just try to download the photo and if a 404 is received,
    // we know there's no photo.  Much simpler.)
    Get ComResponseStatusCode Of hoRest To iTemp1
    If (iTemp1 = 404) Begin
        Showln "This contact has no photo."
        Procedure_Return
    End

    // A successful response will have a status code equal to 200.
    Get ComResponseStatusCode Of hoRest To iTemp1
    If (iTemp1 <> 200) Begin
        // If the response was not successful, then the response body
        // does not contain image data.  Instead it contains XML.
        Get Create (RefClass(cComChilkatStringBuilder)) To hoSbResponseBody
        If (Not(IsComObjectCreated(hoSbResponseBody))) Begin
            Send CreateComObject of hoSbResponseBody
        End
        Get pvComObject of hoImageData to vImageData
        Get ComAppendBd Of hoSbResponseBody vImageData "utf-8" 0 0 To iSuccess

        Get ComResponseStatusCode Of hoRest To iTemp1
        Showln "response status code = " iTemp1
        Get ComResponseStatusText Of hoRest To sTemp1
        Showln "response status text = " sTemp1
        Get ComResponseHeader Of hoRest To sTemp1
        Showln "response header: " sTemp1
        Get ComGetAsString Of hoSbResponseBody To sTemp1
        Showln "response body: " sTemp1
        Get ComLastRequestStartLine Of hoRest To sTemp1
        Showln "request startline: " sTemp1
        Get ComLastRequestHeader Of hoRest To sTemp1
        Showln "request header: " sTemp1
        Procedure_Return
    End

    // Examine the content-type in the response header so we know what file
    // extension to use (.jpg, .png, etc.)
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbContentType
    If (Not(IsComObjectCreated(hoSbContentType))) Begin
        Send CreateComObject of hoSbContentType
    End
    Get ComResponseHdrByName Of hoRest "Content-Type" To sTemp1
    Get ComAppend Of hoSbContentType sTemp1 To iSuccess

    Get ComContentsEqual Of hoSbContentType "image/jpeg" False To bTemp1
    If (bTemp1 = True) Begin
        Get ComWriteFile Of hoImageData "qa_output/contact_photo.jpg" To iSuccess
    End

    Get ComContentsEqual Of hoSbContentType "image/png" False To bTemp1
    If (bTemp1 = True) Begin
        Get ComWriteFile Of hoImageData "qa_output/contact_photo.png" To iSuccess
    End

    Get ComGetAsString Of hoSbContentType To sTemp1
    Showln "Content-Type: " sTemp1
    Showln "Success."


End_Procedure