Chilkat Examples

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Visual Basic 6.0 Web API Examples

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(Visual Basic 6.0) Upload Media to Twitter

Demonstrates uploading image or video files to Twitter. After uploading, the media_id can be used to attach the uploaded media to a tweet.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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

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

Dim http As New ChilkatHttp

' Provide the OAuth 1.0a credentials:
http.OAuth1 = 1
http.OAuthConsumerKey = "TWITTER_CONSUMER_KEY"
http.OAuthConsumerSecret = "TWITTER_CONSUMER_SECRET"
http.OAuthToken = jsonToken.StringOf("oauth_token")
http.OAuthTokenSecret = jsonToken.StringOf("oauth_token_secret")

Dim req As New ChilkatHttpRequest
req.HttpVerb = "POST"
req.ContentType = "multipart/form-data"
req.Path = "/1.1/media/upload.json"

req.AddHeader "Expect","100-continue"

' Add a JPEG image file to the upload.
Dim fac As New CkFileAccess
Dim jpgBytes() As Byte
jpgBytes = fac.ReadEntireFile("qa_data/jpg/starfish.jpg")
success = req.AddBytesForUpload("media","starfish.jpg",jpgBytes)

Dim resp As ChilkatHttpResponse
Set resp = http.SynchronousRequest("upload.twitter.com",443,1,req)
If (http.LastMethodSuccess <> 1) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Dim jsonResponse As New ChilkatJsonObject
jsonResponse.EmitCompact = 0
success = jsonResponse.Load(resp.BodyStr)

If (resp.StatusCode <> 200) Then
    Debug.Print jsonResponse.Emit()
    Exit Sub
End If

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

' A successful JSON response looks like this:

' 	{
' 	  "media_id": 793137045996646400,
' 	  "media_id_string": "793137045996646400",
' 	  "size": 6229,
' 	  "expires_after_secs": 86400,
' 	  "image": {
' 	    "image_type": "image\/jpeg",
' 	    "w": 120,
' 	    "h": 120
' 	  }
' 	}
' 

' Get the information from the JSON:
Debug.Print "media_id_string = " & jsonResponse.StringOf("media_id_string")
Debug.Print "size = " & jsonResponse.IntOf("size")
Debug.Print "image_type = " & jsonResponse.StringOf("image.image_type")
Debug.Print "height/width = " & jsonResponse.IntOf("image.w") & "," & jsonResponse.IntOf("image.h")

 

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