B4J Question Google Play Developer In-App purchase server Data

aaronk · Jul 20, 2017

Hi,

I am trying to get the Google Play Developer API working: https://www.b4x.com/android/forum/threads/google-play-developer-api.81839/#post-518277

In Google API Manager I have Google Play Android Developer API enabled etc.

Based on the example in the above thread, it looks like it's working and sending and receiving data etc.

So far so good..

The question I have is, when a user uses my app (B4A) and purchases the in-app purchase, what data needs to be sent to the GooglePlayDeveloperServer in order to check if that purchase was successful ?

I want to verify if the purchase was successful or not from my B4J server.

Looks like I need to use the following API in order to check the in app purchase: https://developers.google.com/android-publisher/api-ref/purchases/products/get

GET https://www.googleapis.com/androidp...ame/purchases/products/productId/tokens/token

From the test sub I have the following as the j.download:
https://www.googleapis.com/androidp...age.InAppPurchaseSKUHere/tokens/SomeTokenHere

Not sure where the token comes from? I guess this needs to be sent to the B4J app from the B4A app but not sure where to get it from, or it's some other token from somewhere else?

Problem I have when I run the above, I get:

Waiting for debugger to connect...
Program started.
Getting access token from refresh token...
{
"error": "unauthorized_client",
"error_description": "Unauthorized"
}
Error accessing account.

However, I was able to run the example from the tutorial so I know my ClientId & ClientSecret is correct.

Not sure on what I am doing wrong ?

Erel · Jul 20, 2017

aaronk said:
Problem I have when I run the above, I get:

Can you post the relevant code?

aaronk · Jul 20, 2017

Erel said:
Can you post the relevant code?

See the PM I sent you.

In the GooglePlayDeveloperServer:
Inventory module:

B4X:

Sub Download (resp As ServletResponse)
    oauth2.GetAccessToken
    Wait For OAuth2_AccessTokenAvailable (Success As Boolean, Token As String)
    If Success = False Then
        Log("Error accessing account.")
        Return
    End If
    Dim j As HttpJob
    j.Initialize("", Me)
    j.Download("https://www.googleapis.com/androidpublisher/v2/applications/my.package.name/purchases/products/my.package.name.in-app-sku-here/tokens/purchaseToken_from_B4A_when_the_in_app_purchase_was_made")
    j.GetRequest.SetHeader("Authorization", "Bearer " & Token)
    Wait For (j) JobDone(j As HttpJob)
    If j.Success Then
        resp.Write(j.GetString)
    Else
        Log("Online data not available.")
    End If
    j.Release
    Log("Done!!!")
    StopMessageLoop
End Sub

GooglePlayDeveloper:
Main Module:

B4X:

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    DataFolder = File.DirData("GooglePlayDeveloper")
    oauth2.Initialize(Me, "oauth2", ClientId, "https://www.googleapis.com/auth/androidpublisher", _
        ClientSecret, DataFolder)
    Test("my.package.name")
End Sub

Sub Test (PackageName As String)
    oauth2.GetAccessToken
    Wait For OAuth2_AccessTokenAvailable (Success As Boolean, Token As String)
    If Success = False Then
        Log("Error accessing account.")
        Return
    End If
    Dim j As HttpJob
    j.Initialize("", Me)
    j.Download("https://www.googleapis.com/androidpublisher/v2/applications/my.package.name/purchases/products/my.package.name.in-app-sku-here/tokens/purchaseToken_from_B4A_when_the_in_app_purchase_was_made")
 
 
 
    j.GetRequest.SetHeader("Authorization", "Bearer " & Token)
    Wait For (j) JobDone(j As HttpJob)
    If j.Success Then
        Log(j.GetString)
    Else
        Log("Online data not available.")
    End If
    j.Release
    Log("Done!!!")
    ExitApplication
End Sub

Erel · Jul 21, 2017

Lets start with the UI project only.

Check again with the inventory link: https://www.googleapis.com/androidpublisher/v2/applications/packageName/inappproducts

Does it work? Do you see the list of products?

aaronk · Jul 21, 2017

Erel said:
Does it work? Do you see the list of products?

No, doesn't seem to work

Using GooglePlayDeveloperUI:

Erel said:
Check again with the inventory link: https://www.googleapis.com/androidpublisher/v2/applications/packageName/inappproducts

I replaced packageName with my App's package name.

When I run it, it logs the following in the IDE:

Waiting for debugger to connect...
Program started.
Getting access token from refresh token...
{
"error": "unauthorized_client",
"error_description": "Unauthorized"
}
Error accessing account.

Erel · Jul 21, 2017

Call oauth2.ResetToken when your app starts to create a new token.

aaronk · Jul 21, 2017

That worked.

I then changed the URL to:
j.Download($"https://www.googleapis.com/androidp...in-app-sku-here/tokens/purchaseToken-from-app"$)

Now it returns if it the purchase was successful

Waiting for debugger to connect...
Program started.
{
"kind": "androidpublisher#productPurchase",
"purchaseTimeMillis": "1498957648684",
"purchaseState": 0,
"consumptionState": 1,
"developerPayload": ""
}
Done!!!

Thanks heaps for your help!

B4J Question Google Play Developer In-App purchase server Data

aaronk

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Erel

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aaronk

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Erel

B4X founder

aaronk

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Erel

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