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VBScript Web API Examples

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(VBScript) Trello OAuth1 Authorization

Demonstrates OAuth1 authentication for Trello.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

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

consumerKey = "TRELLO_CONSUMER_KEY"
consumerSecret = "TRELLO_CONSUMER_SECRET"

requestTokenUrl = "https://trello.com/1/OAuthGetRequestToken"
authorizeUrl = "https://trello.com/1/OAuthAuthorizeToken"
accessTokenUrl = "https://trello.com/1/OAuthGetAccessToken"

' The port number is picked at random. It's some unused port that won't likely conflict with anything else..
callbackUrl = "http://localhost:3017/"
callbackLocalPort = 3017

' The 1st step in 3-legged OAuth1.0a is to send a POST to the request token URL to obtain an OAuth Request Token
set http = CreateObject("Chilkat_9_5_0.Http")

http.OAuth1 = 1
http.OAuthConsumerKey = consumerKey
http.OAuthConsumerSecret = consumerSecret
http.OAuthCallback = callbackUrl

set req = CreateObject("Chilkat_9_5_0.HttpRequest")
' resp is a Chilkat_9_5_0.HttpResponse
Set resp = http.PostUrlEncoded(requestTokenUrl,req)
If (http.LastMethodSuccess <> 1) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

' If successful, the resp.BodyStr contains something like this:  
' oauth_token=c173ff088a09a67389a42b1ee22366a4&oauth_token_secret=717e6015c6749fe050a923516e739dbb&oauth_callback_confirmed=true
outFile.WriteLine(resp.BodyStr)

set hashTab = CreateObject("Chilkat_9_5_0.Hashtable")
success = hashTab.AddQueryParams(resp.BodyStr)

requestToken = hashTab.LookupStr("oauth_token")
requestTokenSecret = hashTab.LookupStr("oauth_token_secret")
http.OAuthTokenSecret = requestTokenSecret

outFile.WriteLine("oauth_token = " & requestToken)
outFile.WriteLine("oauth_token_secret = " & requestTokenSecret)

' ---------------------------------------------------------------------------
' The next step is to form a URL to send to the authorizeUrl
' This is an HTTP GET that we load into a popup browser.
set sbUrlForBrowser = CreateObject("Chilkat_9_5_0.StringBuilder")
success = sbUrlForBrowser.Append(authorizeUrl)
success = sbUrlForBrowser.Append("?oauth_token=")
success = sbUrlForBrowser.Append(requestToken)
success = sbUrlForBrowser.Append("&scope=read,write,account")

url = sbUrlForBrowser.GetAsString()

outFile.WriteLine("url = " & url)

' When the urlForBrowser is loaded into a browser, the response from Trello will redirect back to localhost:3017
' We'll need to start a socket that is listening on port 3017 for the callback from the browser.
set listenSock = CreateObject("Chilkat_9_5_0.Socket")

backLog = 5
success = listenSock.BindAndListen(callbackLocalPort,backLog)
If (success <> 1) Then
    outFile.WriteLine(listenSock.LastErrorText)
    WScript.Quit
End If

' Wait for the browser's connection in a background thread.
' (We'll send load the URL into the browser following this..)
' Wait a max of 60 seconds before giving up.
maxWaitMs = 60000
' task is a Chilkat_9_5_0.Task
Set task = listenSock.AcceptNextConnectionAsync(maxWaitMs)
success = task.Run()

'  At this point, your application should load the URL in a browser.
'  For example,
' in C#: System.Diagnostics.Process.Start(url);
' in Java: Desktop.getDesktop().browse(new URI(urlForBrowser));
' in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
'               wsh.Run urlForBrowser
'  The Trello account owner would interactively accept or deny the authorization request.

'  Add the code to load the url in a web browser here...
'  Add the code to load the url in a web browser here...
'  Add the code to load the url in a web browser here...
' System.Diagnostics.Process.Start(urlForBrowser);

' Wait for the listenSock's task to complete.
success = task.Wait(maxWaitMs)
If (Not success Or (task.StatusInt <> 7) Or (task.TaskSuccess <> 1)) Then
    If (Not success) Then
        ' The task.LastErrorText applies to the Wait method call.
        outFile.WriteLine(task.LastErrorText)
    Else
        ' The ResultErrorText applies to the underlying task method call (i.e. the AcceptNextConnection)
        outFile.WriteLine(task.Status)
        outFile.WriteLine(task.ResultErrorText)
    End If

    WScript.Quit
End If

' If we get to this point, the connection from the browser arrived and was accepted.

' We no longer need the listen socket...
' Stop listening on port 3017.
success = listenSock.Close(10)

' First get the connected socket.
set sock = CreateObject("Chilkat_9_5_0.Socket")
success = sock.LoadTaskResult(task)

' Read the start line of the request..
startLine = sock.ReceiveUntilMatch(vbCrLf)
If (sock.LastMethodSuccess <> 1) Then
    outFile.WriteLine(sock.LastErrorText)
    WScript.Quit
End If

' Read the request header.
requestHeader = sock.ReceiveUntilMatch(vbCrLf & vbCrLf)
If (sock.LastMethodSuccess <> 1) Then
    outFile.WriteLine(sock.LastErrorText)
    WScript.Quit
End If

' The browser SHOULD be sending us a GET request, and therefore there is no body to the request.
' Once the request header is received, we have all of it.
' We can now send our HTTP response.
set sbResponseHtml = CreateObject("Chilkat_9_5_0.StringBuilder")
success = sbResponseHtml.Append("<html><body><p>Chilkat thanks you!</b></body</html>")

set sbResponse = CreateObject("Chilkat_9_5_0.StringBuilder")
success = sbResponse.Append("HTTP/1.1 200 OK" & vbCrLf)
success = sbResponse.Append("Content-Length: ")
success = sbResponse.AppendInt(sbResponseHtml.Length)
success = sbResponse.Append(vbCrLf)
success = sbResponse.Append("Content-Type: text/html" & vbCrLf)
success = sbResponse.Append(vbCrLf)
success = sbResponse.AppendSb(sbResponseHtml)

success = sock.SendString(sbResponse.GetAsString())
success = sock.Close(50)

' The information we need is in the startLine.
' For example, the startLine will look something like this:
'  GET /?oauth_token=c173ff088a09a67389b42b1ee32366a4&oauth_verifier=c65bc8eed882e04bb94023bb12c0dbef HTTP/1.1
set sbStartLine = CreateObject("Chilkat_9_5_0.StringBuilder")
success = sbStartLine.Append(startLine)
numReplacements = sbStartLine.Replace("GET /?","")
numReplacements = sbStartLine.Replace(" HTTP/1.1","")
success = sbStartLine.Trim()

' oauth_token=c173ff088a09a67389b42b1ee32366a4&oauth_verifier=c65bc8eed882e04bb94023bb12c0dbef
outFile.WriteLine("startline: " & sbStartLine.GetAsString())

hashTab.Clear 
success = hashTab.AddQueryParams(sbStartLine.GetAsString())

requestToken = hashTab.LookupStr("oauth_token")
authVerifier = hashTab.LookupStr("oauth_verifier")

' ------------------------------------------------------------------------------
' Finally , we must exchange the OAuth Request Token for an OAuth Access Token.

http.OAuthToken = requestToken
http.OAuthVerifier = authVerifier
' resp is a Chilkat_9_5_0.HttpResponse
Set resp = http.PostUrlEncoded(accessTokenUrl,req)
If (http.LastMethodSuccess <> 1) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

' Make sure a successful response was received.
If (resp.StatusCode <> 200) Then
    outFile.WriteLine(resp.StatusLine)
    outFile.WriteLine(resp.Header)
    outFile.WriteLine(resp.BodyStr)
    WScript.Quit
End If

' If successful, the resp.BodyStr contains something like this:
' oauth_token=4618e19f5101b7199f75aA9e678d1585576ad84fb89fa40c85c4da13589010d5&oauth_token_secret=64a997b26ea1f47105eca36ce1a5d22e
outFile.WriteLine("response BodyStr = " & resp.BodyStr)

hashTab.Clear 
success = hashTab.AddQueryParams(resp.BodyStr)

accessToken = hashTab.LookupStr("oauth_token")
accessTokenSecret = hashTab.LookupStr("oauth_token_secret")

' The access token + secret is what should be saved and used for
' subsequent REST API calls.
outFile.WriteLine("Access Token = " & accessToken)
outFile.WriteLine("Access Token Secret = " & accessTokenSecret)

' Save the access token for subsequent REST API calls.
set json = CreateObject("Chilkat_9_5_0.JsonObject")
success = json.AppendString("oauth_token",accessToken)
success = json.AppendString("oauth_token_secret",accessTokenSecret)

set fac = CreateObject("Chilkat_9_5_0.FileAccess")
success = fac.WriteEntireTextFile("qa_data/tokens/trello.json",json.Emit(),"utf-8",0)

outFile.WriteLine("Success.")

outFile.Close

 

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