(Lianja) 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".

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

lcConsumerKey = "ETRADE_CONSUMER_KEY"
lcConsumerSecret = "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:
lcRequestTokenUrl = "https://apisb.etrade.com/oauth/request_token"

loHttp = createobject("CkHttp")
llSuccess = .T.

loHttp.OAuth1 = .T.
loHttp.OAuthConsumerKey = lcConsumerKey
loHttp.OAuthConsumerSecret = lcConsumerSecret
loHttp.OAuthCallback = "oob"

loResp = loHttp.QuickGetObj(lcRequestTokenUrl)
if (loHttp.LastMethodSuccess <> .T.) then
    ? loHttp.LastErrorText
    release loHttp
    return
endif

// If successful, the resp.BodyStr contains something like this:  
// oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
? loResp.BodyStr

loHashTab = createobject("CkHashtable")
loHashTab.AddQueryParams(loResp.BodyStr)

lcRequestToken = loHashTab.LookupStr("oauth_token")
lcRequestTokenSecret = loHashTab.LookupStr("oauth_token_secret")
loHttp.OAuthTokenSecret = lcRequestTokenSecret

release loResp

? "oauth_token = " + lcRequestToken
? "oauth_token_secret = " + lcRequestTokenSecret

// Save this request token for the next step..
loJson = createobject("CkJsonObject")
loJson.AppendString("oauth_token",lcRequestToken)
loJson.AppendString("oauth_token_secret",lcRequestTokenSecret)

loFac = createobject("CkFileAccess")
loFac.WriteEntireTextFile("qa_data/tokens/etrade_request_token.json",loJson.Emit(),"utf-8",.F.)

// ---------------------------------------------------------------------------

// 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.
lcAuthorizeUrl = "https://us.etrade.com/e/t/etws/authorize"

loSbUrlForBrowser = createobject("CkStringBuilder")
loSbUrlForBrowser.Append(lcAuthorizeUrl)
loSbUrlForBrowser.Append("?key=")
loSbUrlForBrowser.Append(lcConsumerKey)
loSbUrlForBrowser.Append("&token=")
loSbUrlForBrowser.Append(lcRequestToken)
lcUrl = loSbUrlForBrowser.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)
// in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl        
// 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.

// 


release loHttp
release loHashTab
release loJson
release loFac
release loSbUrlForBrowser