(PowerBuilder) Download Google Contact Photo

Demonstrates how to download Google Contact's photo.

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

integer li_rc
oleobject loo_JsonToken
integer li_Success
oleobject loo_GAuth
oleobject loo_Rest
integer li_BAutoReconnect
oleobject loo_SbPath
string ls_ContactId
integer li_NumReplacements
oleobject loo_ImageData
oleobject loo_SbResponseBody
oleobject loo_SbContentType

// 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

loo_JsonToken = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_JsonToken.ConnectToNewObject("Chilkat.JsonObject")
if li_rc < 0 then
    destroy loo_JsonToken
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_JsonToken.LoadFile("qa_data/tokens/googleContacts.json")
if li_Success <> 1 then
    Write-Debug "Failed to load googleContacts.json"
    destroy loo_JsonToken
    return
end if

loo_GAuth = create oleobject
// Use "Chilkat_9_5_0.AuthGoogle" for versions of Chilkat < 10.0.0
li_rc = loo_GAuth.ConnectToNewObject("Chilkat.AuthGoogle")

loo_GAuth.AccessToken = loo_JsonToken.StringOf("access_token")

loo_Rest = create oleobject
// Use "Chilkat_9_5_0.Rest" for versions of Chilkat < 10.0.0
li_rc = loo_Rest.ConnectToNewObject("Chilkat.Rest")

// Connect using TLS.
li_BAutoReconnect = 1
li_Success = loo_Rest.Connect("www.google.com",443,1,li_BAutoReconnect)

// Provide the authentication credentials (i.e. the access token)
loo_Rest.SetAuthGoogle(loo_GAuth)

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

// To get the photo, send the following:

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

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

loo_SbPath = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbPath.ConnectToNewObject("Chilkat.StringBuilder")

// Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
ls_ContactId = "1ea2e4fe0ef24e09"
loo_SbPath.SetString("/m8/feeds/photos/media/default/{contactId}")
li_NumReplacements = loo_SbPath.Replace("{contactId}",ls_ContactId)

loo_ImageData = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_ImageData.ConnectToNewObject("Chilkat.BinData")

li_Success = loo_Rest.FullRequestNoBodyBd("GET",loo_SbPath.GetAsString(),loo_ImageData)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_JsonToken
    destroy loo_GAuth
    destroy loo_Rest
    destroy loo_SbPath
    destroy loo_ImageData
    return
end if

// 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 loo_Rest.ResponseStatusCode = 404 then
    Write-Debug "This contact has no photo."
    destroy loo_JsonToken
    destroy loo_GAuth
    destroy loo_Rest
    destroy loo_SbPath
    destroy loo_ImageData
    return
end if

// A successful response will have a status code equal to 200.
if loo_Rest.ResponseStatusCode <> 200 then
    // If the response was not successful, then the response body
    // does not contain image data.  Instead it contains XML.
    loo_SbResponseBody = create oleobject
    // Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    li_rc = loo_SbResponseBody.ConnectToNewObject("Chilkat.StringBuilder")

    loo_SbResponseBody.AppendBd(loo_ImageData,"utf-8",0,0)

    Write-Debug "response status code = " + string(loo_Rest.ResponseStatusCode)
    Write-Debug "response status text = " + loo_Rest.ResponseStatusText
    Write-Debug "response header: " + loo_Rest.ResponseHeader
    Write-Debug "response body: " + loo_SbResponseBody.GetAsString()
    Write-Debug "request startline: " + loo_Rest.LastRequestStartLine
    Write-Debug "request header: " + loo_Rest.LastRequestHeader
    destroy loo_JsonToken
    destroy loo_GAuth
    destroy loo_Rest
    destroy loo_SbPath
    destroy loo_ImageData
    destroy loo_SbResponseBody
    return
end if

// Examine the content-type in the response header so we know what file
// extension to use (.jpg, .png, etc.)
loo_SbContentType = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbContentType.ConnectToNewObject("Chilkat.StringBuilder")

loo_SbContentType.Append(loo_Rest.ResponseHdrByName("Content-Type"))

if loo_SbContentType.ContentsEqual("image/jpeg",0) = 1 then
    loo_ImageData.WriteFile("qa_output/contact_photo.jpg")
end if

if loo_SbContentType.ContentsEqual("image/png",0) = 1 then
    loo_ImageData.WriteFile("qa_output/contact_photo.png")
end if

Write-Debug "Content-Type: " + loo_SbContentType.GetAsString()
Write-Debug "Success."


destroy loo_JsonToken
destroy loo_GAuth
destroy loo_Rest
destroy loo_SbPath
destroy loo_ImageData
destroy loo_SbResponseBody
destroy loo_SbContentType