Xbase++

Download Google Contact Photo

See more Google APIs Examples

Demonstrates how to download Google Contact's photo. Xbase++

LOCAL nSuccess
LOCAL oJsonToken
LOCAL oGAuth
LOCAL oRest
LOCAL nBAutoReconnect
LOCAL oSbPath
LOCAL cContactId
LOCAL nNumReplacements
LOCAL oImageData
LOCAL oSbResponseBody
LOCAL oSbContentType

nSuccess := 0

//  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

oJsonToken := CreateObject("Chilkat.JsonObject")
nSuccess := oJsonToken:LoadFile("qa_data/tokens/googleContacts.json")
IF (nSuccess != 1)
    ? "Failed to load googleContacts.json"
    oJsonToken:destroy()
    RETURN
ENDIF

oGAuth := CreateObject("Chilkat.AuthGoogle")
oGAuth:AccessToken := oJsonToken:StringOf("access_token")

oRest := CreateObject("Chilkat.Rest")

//  Connect using TLS.
nBAutoReconnect := 1
nSuccess := oRest:Connect("www.google.com", 443, 1, nBAutoReconnect)

//  Provide the authentication credentials (i.e. the access token)
oRest:SetAuthGoogle(oGAuth)

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

//  To get the photo, send the following:

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

oRest:AddHeader("GData-Version", "3.0")

oSbPath := CreateObject("Chilkat.StringBuilder")
//  Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
cContactId := "1ea2e4fe0ef24e09"
oSbPath:SetString("/m8/feeds/photos/media/default/{contactId}")
nNumReplacements := oSbPath:Replace("{contactId}", cContactId)

oImageData := CreateObject("Chilkat.BinData")
nSuccess := oRest:FullRequestNoBodyBd("GET", oSbPath:GetAsString(), oImageData)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oJsonToken:destroy()
    oGAuth:destroy()
    oRest:destroy()
    oSbPath:destroy()
    oImageData:destroy()
    RETURN
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 (oRest:ResponseStatusCode == 404)
    ? "This contact has no photo."
    oJsonToken:destroy()
    oGAuth:destroy()
    oRest:destroy()
    oSbPath:destroy()
    oImageData:destroy()
    RETURN
ENDIF

//  A successful response will have a status code equal to 200.
IF (oRest:ResponseStatusCode != 200)
    //  If the response was not successful, then the response body
    //  does not contain image data.  Instead it contains XML.
    oSbResponseBody := CreateObject("Chilkat.StringBuilder")
    oSbResponseBody:AppendBd(oImageData, "utf-8", 0, 0)

    ? "response status code = " + Str(oRest:ResponseStatusCode)
    ? "response status text = " + oRest:ResponseStatusText
    ? "response header: " + oRest:ResponseHeader
    ? "response body: " + oSbResponseBody:GetAsString()
    ? "request startline: " + oRest:LastRequestStartLine
    ? "request header: " + oRest:LastRequestHeader
    oJsonToken:destroy()
    oGAuth:destroy()
    oRest:destroy()
    oSbPath:destroy()
    oImageData:destroy()
    oSbResponseBody:destroy()
    RETURN
ENDIF

//  Examine the content-type in the response header so we know what file
//  extension to use (.jpg, .png, etc.)
oSbContentType := CreateObject("Chilkat.StringBuilder")
oSbContentType:Append(oRest:ResponseHdrByName("Content-Type"))

IF (oSbContentType:ContentsEqual("image/jpeg", 0) == 1)
    oImageData:WriteFile("qa_output/contact_photo.jpg")
ENDIF

IF (oSbContentType:ContentsEqual("image/png", 0) == 1)
    oImageData:WriteFile("qa_output/contact_photo.png")
ENDIF

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

oJsonToken:destroy()
oGAuth:destroy()
oRest:destroy()
oSbPath:destroy()
oImageData:destroy()
oSbResponseBody:destroy()
oSbContentType:destroy()