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VB.NET UWP/WinRT Web API Examples

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(VB.NET UWP/WinRT) Emoji Tweet

Demonstrates posting a status update that includes an emoji character.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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

' ----------------------------------------------------------------------
' This initial setup, which involves setting the OAuth1 properties and connecting
' to api.twitter.com, is only required once at the beginning.  Once connected, the same
' object instance may be re-used, and if necessary, it will automatically reconnect
' as needed.

' Assume we've previously obtained an access token and saved it to a JSON file..
Dim json As New Chilkat.JsonObject
Dim success As Boolean = json.LoadFile("qa_data/tokens/twitter.json")

Dim rest As New Chilkat.Rest
Dim oauth1 As New Chilkat.OAuth1

oauth1.ConsumerKey = "TWITTER_CONSUMER_KEY"
oauth1.ConsumerSecret = "TWITTER_CONSUMER_SECRET"
oauth1.Token = json.StringOf("oauth_token")
oauth1.TokenSecret = json.StringOf("oauth_token_secret")
oauth1.SignatureMethod = "HMAC-SHA1"
oauth1.GenNonce(16)

rest.SetAuthOAuth1(oauth1,False)

Dim bAutoReconnect As Boolean = True
success = Await rest.ConnectAsync("api.twitter.com",443,True,bAutoReconnect)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' This ends the initial setup...
' ----------------------------------------------------------------------

' For this example, I've pre-created a text file containing two emoji
' characters (the "ghost" emoji, and a "face savouring delicious food" emoji).  
' This text file was saved using the utf-8 encoding.

' The utf-8 bytes for the ghost emoji are 0x9f 0x91 0xbb.  (Note: This is the utf-8
' representation that does not use surrogate pairs.)
' 
' The utf-8 bytes for the "face savouring delicious food" emoji are \xF0\x9F\x98\x8B.

Dim sbText As New Chilkat.StringBuilder
sbText.LoadFile("qa_data/txt/ghost_emoji.txt","utf-8")
sbText.Prepend("Test tweet using two emoji chars: ")

' Send a tweet...
rest.ClearAllQueryParams()
rest.AddQueryParam("status",sbText.GetAsString())
Dim resp As String = Await rest.FullRequestFormUrlEncodedAsync("POST","/1.1/statuses/update.json")
If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Dim jsonResponse As New Chilkat.JsonObject
jsonResponse.EmitCompact = False
jsonResponse.Load(resp)

If (rest.ResponseStatusCode <> 200) Then
    Debug.WriteLine(jsonResponse.Emit())
    Exit Sub
End If


' Show the successful response:
Debug.WriteLine(jsonResponse.Emit())
Debug.WriteLine("Success.")

 

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