(Visual FoxPro) 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".

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL lcConsumerKey
LOCAL lcConsumerSecret
LOCAL lcRequestTokenUrl
LOCAL loHttp
LOCAL loResp
LOCAL loHashTab
LOCAL lcRequestToken
LOCAL lcRequestTokenSecret
LOCAL loJson
LOCAL loFac
LOCAL lcAuthorizeUrl
LOCAL loSbUrlForBrowser
LOCAL lcUrl

lnSuccess = 0

* 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('Chilkat.Http')
lnSuccess = 1

loHttp.OAuth1 = 1
loHttp.OAuthConsumerKey = lcConsumerKey
loHttp.OAuthConsumerSecret = lcConsumerSecret
loHttp.OAuthCallback = "oob"

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpNoBody("GET",lcRequestTokenUrl,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loResp
    CANCEL
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('Chilkat.Hashtable')
loHashTab.AddQueryParams(loResp.BodyStr)

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

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

* Save this request token for the next step..
loJson = CreateObject('Chilkat.JsonObject')
loJson.AppendString("oauth_token",lcRequestToken)
loJson.AppendString("oauth_token_secret",lcRequestTokenSecret)

loFac = CreateObject('Chilkat.FileAccess')
loFac.WriteEntireTextFile("qa_data/tokens/etrade_request_token.json",loJson.Emit(),"utf-8",0)

* ---------------------------------------------------------------------------

* 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('Chilkat.StringBuilder')
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 loResp
RELEASE loHashTab
RELEASE loJson
RELEASE loFac
RELEASE loSbUrlForBrowser