Chilkat Examples

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Unicode C Web API Examples

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(Unicode 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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#include <C_CkHttpW.h>
#include <C_CkHttpResponseW.h>
#include <C_CkHashtableW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkFileAccessW.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    const wchar_t *consumerKey;
    const wchar_t *consumerSecret;
    const wchar_t *requestTokenUrl;
    HCkHttpW http;
    BOOL success;
    HCkHttpResponseW resp;
    HCkHashtableW hashTab;
    const wchar_t *requestToken;
    const wchar_t *requestTokenSecret;
    HCkJsonObjectW json;
    HCkFileAccessW fac;
    const wchar_t *authorizeUrl;
    HCkStringBuilderW sbUrlForBrowser;
    const wchar_t *url;

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

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

    http = CkHttpW_Create();
    success = TRUE;

    CkHttpW_putOAuth1(http,TRUE);
    CkHttpW_putOAuthConsumerKey(http,consumerKey);
    CkHttpW_putOAuthConsumerSecret(http,consumerSecret);
    CkHttpW_putOAuthCallback(http,L"oob");

    resp = CkHttpW_QuickGetObj(http,requestTokenUrl);
    if (CkHttpW_getLastMethodSuccess(http) != TRUE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        return;
    }

    // If successful, the resp.BodyStr contains something like this:  
    // oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
    wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));

    hashTab = CkHashtableW_Create();
    CkHashtableW_AddQueryParams(hashTab,CkHttpResponseW_bodyStr(resp));

    requestToken = CkHashtableW_lookupStr(hashTab,L"oauth_token");
    requestTokenSecret = CkHashtableW_lookupStr(hashTab,L"oauth_token_secret");
    CkHttpW_putOAuthTokenSecret(http,requestTokenSecret);

    CkHttpResponseW_Dispose(resp);

    wprintf(L"oauth_token = %s\n",requestToken);
    wprintf(L"oauth_token_secret = %s\n",requestTokenSecret);

    // Save this request token for the next step..
    json = CkJsonObjectW_Create();
    CkJsonObjectW_AppendString(json,L"oauth_token",requestToken);
    CkJsonObjectW_AppendString(json,L"oauth_token_secret",requestTokenSecret);

    fac = CkFileAccessW_Create();
    CkFileAccessW_WriteEntireTextFile(fac,L"qa_data/tokens/etrade_request_token.json",CkJsonObjectW_emit(json),L"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.
    authorizeUrl = L"https://us.etrade.com/e/t/etws/authorize";

    sbUrlForBrowser = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbUrlForBrowser,authorizeUrl);
    CkStringBuilderW_Append(sbUrlForBrowser,L"?key=");
    CkStringBuilderW_Append(sbUrlForBrowser,consumerKey);
    CkStringBuilderW_Append(sbUrlForBrowser,L"&token=");
    CkStringBuilderW_Append(sbUrlForBrowser,requestToken);
    url = CkStringBuilderW_getAsString(sbUrlForBrowser);

    // 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.

    // 


    CkHttpW_Dispose(http);
    CkHashtableW_Dispose(hashTab);
    CkJsonObjectW_Dispose(json);
    CkFileAccessW_Dispose(fac);
    CkStringBuilderW_Dispose(sbUrlForBrowser);

    }

 

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