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.NET Core C# Web API Examples

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(.NET Core C#) 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

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Chilkat .NET Assemblies

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

string consumerKey = "ETRADE_CONSUMER_KEY";
string consumerSecret = "ETRADE_CONSUMER_SECRET";

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

Chilkat.Http http = new Chilkat.Http();
bool success = true;

http.OAuth1 = true;
http.OAuthConsumerKey = consumerKey;
http.OAuthConsumerSecret = consumerSecret;
http.OAuthCallback = "oob";

Chilkat.JsonObject jsonRequestToken = new Chilkat.JsonObject();
success = jsonRequestToken.LoadFile("qa_data/tokens/etrade_request_token.json");
string requestToken = jsonRequestToken.StringOf("oauth_token");
string requestTokenSecret = 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";

Chilkat.HttpResponse resp = http.QuickGetObj(accessTokenUrl);
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

// Make sure a successful response was received.
if (resp.StatusCode != 200) {
    Debug.WriteLine(resp.StatusLine);
    Debug.WriteLine(resp.Header);
    Debug.WriteLine(resp.BodyStr);
    return;
}

// If successful, the resp.BodyStr contains something like this:
// oauth_token=85123455-fF41296Bi3daM8eCo9Y5vZabcdxXpRv864plYPOjr&oauth_token_secret=afiYJOgabcdSfGae7BDvJVVTwys8fUGpra5guZxbmFBZo
Debug.WriteLine(resp.BodyStr);

Chilkat.Hashtable hashTab = new Chilkat.Hashtable();
hashTab.AddQueryParams(resp.BodyStr);

string accessToken = hashTab.LookupStr("oauth_token");
string accessTokenSecret = hashTab.LookupStr("oauth_token_secret");

// The access token + secret is what should be saved and used for
// subsequent REST API calls.
Debug.WriteLine("Access Token = " + accessToken);
Debug.WriteLine("Access Token Secret = " + accessTokenSecret);

// Save this access token for future calls.
// Just in case we need user_id and screen_name, save those also..
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.AppendString("oauth_token",accessToken);
json.AppendString("oauth_token_secret",accessTokenSecret);

Chilkat.FileAccess fac = new Chilkat.FileAccess();
fac.WriteEntireTextFile("qa_data/tokens/etrade.json",json.Emit(),"utf-8",false);

Debug.WriteLine("Success.");

 

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