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C# Web API Examples

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(C#) 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.

string consumerKey = "ETRADE_CONSUMER_KEY";
string consumerSecret = "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:
string requestTokenUrl = "https://apisb.etrade.com/oauth/request_token";

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

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

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

// If successful, the resp.BodyStr contains something like this:  
// oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
Debug.WriteLine(resp.BodyStr);

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

string requestToken = hashTab.LookupStr("oauth_token");
string requestTokenSecret = hashTab.LookupStr("oauth_token_secret");
http.OAuthTokenSecret = requestTokenSecret;

Debug.WriteLine("oauth_token = " + requestToken);
Debug.WriteLine("oauth_token_secret = " + requestTokenSecret);

// Save this request token for the next step..
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.AppendString("oauth_token",requestToken);
json.AppendString("oauth_token_secret",requestTokenSecret);

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

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

// 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.
string authorizeUrl = "https://us.etrade.com/e/t/etws/authorize";

Chilkat.StringBuilder sbUrlForBrowser = new Chilkat.StringBuilder();
sbUrlForBrowser.Append(authorizeUrl);
sbUrlForBrowser.Append("?key=");
sbUrlForBrowser.Append(consumerKey);
sbUrlForBrowser.Append("&token=");
sbUrlForBrowser.Append(requestToken);
string url = sbUrlForBrowser.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)
// 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.

// 

 

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