(Visual FoxPro) ETrade OAuth1 Authorization (3-legged) Step 2

Demonstrates the final step in 3-legged OAuth1 authorization for the ETrade REST API. Example uses the OAuth1 verifier code that was copy-and-pasted from the browser in the 1st step. The end result of this final OAuth1 step is an access token that can be used to make ETrade REST API calls.

See https://apisb.etrade.com/docs/api/authorization/get_access_token.html

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

LOCAL lcConsumerKey
LOCAL lcConsumerSecret
LOCAL lcRequestTokenUrl
LOCAL lcAuthorizeUrl
LOCAL lcAccessTokenUrl
LOCAL loHttp
LOCAL lnSuccess
LOCAL loJsonRequestToken
LOCAL lcRequestToken
LOCAL lcRequestTokenSecret
LOCAL loResp
LOCAL loHashTab
LOCAL lcAccessToken
LOCAL lcAccessTokenSecret
LOCAL loJson
LOCAL loFac

* 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"

lcRequestTokenUrl = "https://apisb.etrade.com/oauth/request_token"
lcAuthorizeUrl = "https://us.etrade.com/e/t/etws/authorize"
lcAccessTokenUrl = "https://apisb.etrade.com/oauth/access_token"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')
lnSuccess = 1

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonRequestToken = CreateObject('Chilkat.JsonObject')
lnSuccess = loJsonRequestToken.LoadFile("qa_data/tokens/etrade_request_token.json")
lcRequestToken = loJsonRequestToken.StringOf("oauth_token")
lcRequestTokenSecret = loJsonRequestToken.StringOf("oauth_token_secret")

* ------------------------------------------------------------------------------
* Exchange the OAuth Request Token for an OAuth Access Token.

loHttp.OAuthToken = lcRequestToken
loHttp.OAuthTokenSecret = lcRequestTokenSecret

* This is the verifier that was interactively copy-and-pasted from the browser back to our app.
loHttp.OAuthVerifier = "NJ07S"

loResp = loHttp.QuickGetObj(lcAccessTokenUrl)
IF (loHttp.LastMethodSuccess <> 1) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loJsonRequestToken
    CANCEL
ENDIF

* Make sure a successful response was received.
IF (loResp.StatusCode <> 200) THEN
    ? loResp.StatusLine
    ? loResp.Header
    ? loResp.BodyStr
    RELEASE loHttp
    RELEASE loJsonRequestToken
    CANCEL
ENDIF

* If successful, the resp.BodyStr contains something like this:
* oauth_token=85123455-fF41296Bi3daM8eCo9Y5vZabcdxXpRv864plYPOjr&oauth_token_secret=afiYJOgabcdSfGae7BDvJVVTwys8fUGpra5guZxbmFBZo
? loResp.BodyStr

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Hashtable')
loHashTab = CreateObject('Chilkat.Hashtable')
loHashTab.AddQueryParams(loResp.BodyStr)

lcAccessToken = loHashTab.LookupStr("oauth_token")
lcAccessTokenSecret = loHashTab.LookupStr("oauth_token_secret")

RELEASE loResp

* The access token + secret is what should be saved and used for
* subsequent REST API calls.
? "Access Token = " + lcAccessToken
? "Access Token Secret = " + lcAccessTokenSecret

* Save this access token for future calls.
* Just in case we need user_id and screen_name, save those also..
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.AppendString("oauth_token",lcAccessToken)
loJson.AppendString("oauth_token_secret",lcAccessTokenSecret)

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.FileAccess')
loFac = CreateObject('Chilkat.FileAccess')
loFac.WriteEntireTextFile("qa_data/tokens/etrade.json",loJson.Emit(),"utf-8",0)

? "Success."

RELEASE loHttp
RELEASE loJsonRequestToken
RELEASE loHashTab
RELEASE loJson
RELEASE loFac