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VB.NET UWP/WinRT Web API Examples

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(VB.NET UWP/WinRT) ETrade OAuth1 Authorization (3-legged) Step 1

Demonstrates the first step in 3-legged OAuth1 authorization for the ETrade REST API. This example sends an HTTP request to the "request token URL" to get a request token that begins the OAuth1 process. (See https://apisb.etrade.com/docs/api/authorization/request_token.html )

This example uses the sandbox request token URL. The live request token URL would be "https://api.etrade.com/oauth/request_token".

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.

Dim consumerKey As String = "ETRADE_CONSUMER_KEY"
Dim consumerSecret As String = "ETRADE_CONSUMER_SECRET"

' Note: This example uses the sandbox request token URL.
' The live Get Request Token Request URL is:
' https://api.etrade.com/oauth/request_token
' This example will use the Sandbox Token Request URL:
Dim requestTokenUrl As String = "https://apisb.etrade.com/oauth/request_token"

Dim http As New Chilkat.Http
Dim success As Boolean = True

http.OAuth1 = True
http.OAuthConsumerKey = consumerKey
http.OAuthConsumerSecret = consumerSecret
http.OAuthCallback = "oob"

Dim resp As Chilkat.HttpResponse = Await http.QuickGetObjAsync(requestTokenUrl)
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


' If successful, the resp.BodyStr contains something like this:  
' oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
Debug.WriteLine(resp.BodyStr)

Dim hashTab As New Chilkat.Hashtable
hashTab.AddQueryParams(resp.BodyStr)

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



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


' Save this request token for the next step..
Dim json As New Chilkat.JsonObject
json.AppendString("oauth_token",requestToken)
json.AppendString("oauth_token_secret",requestTokenSecret)

Dim fac As New Chilkat.FileAccess
fac.WriteEntireTextFile("qa_data/tokens/etrade_request_token.json",json.Emit(),"utf-8",False)

' ---------------------------------------------------------------------------

' 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.
Dim authorizeUrl As String = "https://us.etrade.com/e/t/etws/authorize"

Dim sbUrlForBrowser As New Chilkat.StringBuilder
sbUrlForBrowser.Append(authorizeUrl)
sbUrlForBrowser.Append("?key=")
sbUrlForBrowser.Append(consumerKey)
sbUrlForBrowser.Append("&token=")
sbUrlForBrowser.Append(requestToken)
Dim url As String = sbUrlForBrowser.GetAsString()


' 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(url));
' in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
'              wsh.Run url
' in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
' The Microsoft 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...



' The ETrade account owner will login and grant access to the application.
' A short verifier code will be displayed (as shown below), and this must be copy-and-pasted
' into the next step to Complete the 3-legged OAuth1 Authorization 

' Note: The browser will NOT automatically direct you to the next page.
' You should copy the verifier code, close the browser, and then paste the verifier
' code into your application.

' 

 

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