B4X

Firebase POST - Pushing Data (JSON Object)

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Uses the POST method to append a new record (JSON Object) at a particular location in the database. Firebase automatically generates the push ID and returns it in the response. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

B4X

Dim success As Boolean = False

'  Push a new record to a Firebase JSON database using the POST HTTP method.

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

'  This example assumes a JWT authentication token, if required, has been previously obtained.
'  See Get Firebase Access Token from JSON Service Account Private Key for sample code.

'  Load the previously obtained Firebase access token into a string.
Dim fac As ChilkatFileAccess
fac.Initialize
Dim accessToken As String = fac.ReadEntireTextFile("qa_data/tokens/firebaseToken.txt", "utf-8")
If fac.LastMethodSuccess <> True Then
    Log(fac.LastErrorText)
    Return
End If


Dim rest As ChilkatRest
rest.Initialize("rest")

'  Make the initial connection (without sending a request yet).
'  Once connected, any number of requests may be sent.  It is not necessary to explicitly
'  call Connect before each request.  
success = rest.Connect("chilkat.firebaseio.com", 443, True, True)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If

Dim authGoogle As ChilkatAuthGoogle
authGoogle.Initialize("authGoogle")
authGoogle.AccessToken = accessToken
rest.SetAuthGoogle(authGoogle)

'  Chilkat's sample data (pig-rescue data) is publicly readable at: https://chilkat.firebaseio.com/.json
'  This data is publicly readable, but not writable.  You'll need to 
'  run against your own database..

'  We're going to add a new pig with four name/value pairs:
Dim pigRecord As ChilkatJsonObject
pigRecord.Initialize
pigRecord.AppendString("name", "William")
pigRecord.AppendString("species", "pot belly pig")
pigRecord.AppendString("type", "Mike's Herd")
pigRecord.AppendString("birth", "March, 2001")

Dim jsonResponse As String = rest.FullRequestString("POST", "/pig-rescue/animal.json", pigRecord.Emit)
If rest.LastMethodSuccess <> True Then
    '  Something happened in the communications (either no request was sent, or no response was received.
    '  (The Chilkat REST API also has lower-level methods where an app can send the request in one call,
    '  and then receive the response in another call.)
    Log(rest.LastErrorText)
    Return
End If


'  Check the response status code.   A 200 response status indicates success.
If rest.ResponseStatusCode <> 200 Then
    Log(rest.ResponseStatusText)
    Log(jsonResponse)
    Log("Failed.")
    Return
End If


'  Get the push ID generated by Firebase
Dim resp As ChilkatJsonObject
resp.Initialize
resp.Load(jsonResponse)
Dim pushId As String = resp.StringOf("name")
Log("Added record with push ID " & pushId)
Log("Success.")