B4X Requires Chilkat v11.0.0+

ETrade OAuth1 Authorization (3-legged) Step 2

See more ETrade Examples

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

B4X

Dim success As Boolean = False

'  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"

Dim requestTokenUrl As String = "https://apisb.etrade.com/oauth/request_token"
Dim authorizeUrl As String = "https://us.etrade.com/e/t/etws/authorize"
Dim accessTokenUrl As String = "https://apisb.etrade.com/oauth/access_token"

Dim http As ChilkatHttp
http.Initialize("http")
success = True

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

Dim jsonRequestToken As ChilkatJsonObject
jsonRequestToken.Initialize
success = jsonRequestToken.LoadFile("qa_data/tokens/etrade_request_token.json")
Dim requestToken As String = jsonRequestToken.StringOf("oauth_token")
Dim requestTokenSecret As String = jsonRequestToken.StringOf("oauth_token_secret")

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

http.OAuthToken = requestToken
http.OAuthTokenSecret = requestTokenSecret

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

'  Use the explicit string "INCLUDE_OAUTH_TOKEN" to tell Chilkat to include the "oauth_token" param in the Authorization header field
http.UncommonOptions = "INCLUDE_OAUTH_TOKEN"

Dim resp As ChilkatHttpResponse
resp.Initialize
success = http.HttpNoBody("GET", accessTokenUrl, resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


'  Make sure a successful response was received.
If resp.StatusCode <> 200 Then
    Log(resp.StatusLine)
    Log(resp.Header)
    Log(resp.BodyStr)
    Return
End If


'  If successful, the resp.BodyStr contains something like this:
'  oauth_token=85123455-fF41296Bi3daM8eCo9Y5vZabcdxXpRv864plYPOjr&oauth_token_secret=afiYJOgabcdSfGae7BDvJVVTwys8fUGpra5guZxbmFBZo
Log(resp.BodyStr)

Dim hashTab As ChilkatHashtable
hashTab.Initialize
hashTab.AddQueryParams(resp.BodyStr)

Dim accessToken As String = hashTab.LookupStr("oauth_token")
Dim accessTokenSecret As String = hashTab.LookupStr("oauth_token_secret")

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

'  Save this access token for future calls.
'  Just in case we need user_id and screen_name, save those also..
Dim json As ChilkatJsonObject
json.Initialize
json.AppendString("oauth_token", accessToken)
json.AppendString("oauth_token_secret", accessTokenSecret)

Dim fac As ChilkatFileAccess
fac.Initialize
fac.WriteEntireTextFile("qa_data/tokens/etrade.json", json.Emit, "utf-8", False)

Log("Success.")