(Visual FoxPro) Download Google Contact Photo

Demonstrates how to download Google Contact's photo.

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

LOCAL loJsonToken
LOCAL lnSuccess
LOCAL loGAuth
LOCAL loRest
LOCAL lnBAutoReconnect
LOCAL loSbPath
LOCAL lcContactId
LOCAL lnNumReplacements
LOCAL loImageData
LOCAL loSbResponseBody
LOCAL loSbContentType

* 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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonToken = CreateObject('Chilkat.JsonObject')
lnSuccess = loJsonToken.LoadFile("qa_data/tokens/googleContacts.json")
IF (lnSuccess <> 1) THEN
    ? "Failed to load googleContacts.json"
    RELEASE loJsonToken
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.AuthGoogle')
loGAuth = CreateObject('Chilkat.AuthGoogle')
loGAuth.AccessToken = loJsonToken.StringOf("access_token")

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Rest')
loRest = CreateObject('Chilkat.Rest')

* Connect using TLS.
lnBAutoReconnect = 1
lnSuccess = loRest.Connect("www.google.com",443,1,lnBAutoReconnect)

* Provide the authentication credentials (i.e. the access token)
loRest.SetAuthGoogle(loGAuth)

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

* To get the photo, send the following:

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

loRest.AddHeader("GData-Version","3.0")

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbPath = CreateObject('Chilkat.StringBuilder')
* Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
lcContactId = "1ea2e4fe0ef24e09"
loSbPath.SetString("/m8/feeds/photos/media/default/{contactId}")
lnNumReplacements = loSbPath.Replace("{contactId}",lcContactId)

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
loImageData = CreateObject('Chilkat.BinData')
lnSuccess = loRest.FullRequestNoBodyBd("GET",loSbPath.GetAsString(),loImageData)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbPath
    RELEASE loImageData
    CANCEL
ENDIF

* 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.)
IF (loRest.ResponseStatusCode = 404) THEN
    ? "This contact has no photo."
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbPath
    RELEASE loImageData
    CANCEL
ENDIF

* A successful response will have a status code equal to 200.
IF (loRest.ResponseStatusCode <> 200) THEN
    * If the response was not successful, then the response body
    * does not contain image data.  Instead it contains XML.
    * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
    loSbResponseBody = CreateObject('Chilkat.StringBuilder')
    loSbResponseBody.AppendBd(loImageData,"utf-8",0,0)

    ? "response status code = " + STR(loRest.ResponseStatusCode)
    ? "response status text = " + loRest.ResponseStatusText
    ? "response header: " + loRest.ResponseHeader
    ? "response body: " + loSbResponseBody.GetAsString()
    ? "request startline: " + loRest.LastRequestStartLine
    ? "request header: " + loRest.LastRequestHeader
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbPath
    RELEASE loImageData
    RELEASE loSbResponseBody
    CANCEL
ENDIF

* Examine the content-type in the response header so we know what file
* extension to use (.jpg, .png, etc.)
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbContentType = CreateObject('Chilkat.StringBuilder')
loSbContentType.Append(loRest.ResponseHdrByName("Content-Type"))

IF (loSbContentType.ContentsEqual("image/jpeg",0) = 1) THEN
    loImageData.WriteFile("qa_output/contact_photo.jpg")
ENDIF

IF (loSbContentType.ContentsEqual("image/png",0) = 1) THEN
    loImageData.WriteFile("qa_output/contact_photo.png")
ENDIF

? "Content-Type: " + loSbContentType.GetAsString()
? "Success."

RELEASE loJsonToken
RELEASE loGAuth
RELEASE loRest
RELEASE loSbPath
RELEASE loImageData
RELEASE loSbResponseBody
RELEASE loSbContentType