(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".

Note: This example requires Chilkat v11.0.0 or greater.

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#include <C_CkHttp.h>
#include <C_CkHttpResponse.h>
#include <C_CkHashtable.h>
#include <C_CkJsonObject.h>
#include <C_CkFileAccess.h>
#include <C_CkStringBuilder.h>
#include <C_CkOAuth2.h>

void ChilkatSample(void)
    {
    BOOL success;
    const char *consumerKey;
    const char *consumerSecret;
    const char *requestTokenUrl;
    HCkHttp http;
    HCkHttpResponse resp;
    HCkHashtable hashTab;
    const char *requestToken;
    const char *requestTokenSecret;
    HCkJsonObject json;
    HCkFileAccess fac;
    const char *authorizeUrl;
    HCkStringBuilder sbUrlForBrowser;
    const char *url;
    HCkOAuth2 oauth2;

    success = FALSE;

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

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

    http = CkHttp_Create();
    success = TRUE;

    CkHttp_putOAuth1(http,TRUE);
    CkHttp_putOAuthConsumerKey(http,consumerKey);
    CkHttp_putOAuthConsumerSecret(http,consumerSecret);
    CkHttp_putOAuthCallback(http,"oob");

    resp = CkHttpResponse_Create();
    success = CkHttp_HttpNoBody(http,"GET",requestTokenUrl,resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpResponse_Dispose(resp);
        return;
    }

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

    hashTab = CkHashtable_Create();
    CkHashtable_AddQueryParams(hashTab,CkHttpResponse_bodyStr(resp));

    requestToken = CkHashtable_lookupStr(hashTab,"oauth_token");
    requestTokenSecret = CkHashtable_lookupStr(hashTab,"oauth_token_secret");
    CkHttp_putOAuthTokenSecret(http,requestTokenSecret);

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

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

    fac = CkFileAccess_Create();
    CkFileAccess_WriteEntireTextFile(fac,"qa_data/tokens/etrade_request_token.json",CkJsonObject_emit(json),"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 = "https://us.etrade.com/e/t/etws/authorize";

    sbUrlForBrowser = CkStringBuilder_Create();
    CkStringBuilder_Append(sbUrlForBrowser,authorizeUrl);
    CkStringBuilder_Append(sbUrlForBrowser,"?key=");
    CkStringBuilder_Append(sbUrlForBrowser,consumerKey);
    CkStringBuilder_Append(sbUrlForBrowser,"&token=");
    CkStringBuilder_Append(sbUrlForBrowser,requestToken);
    url = CkStringBuilder_getAsString(sbUrlForBrowser);

    // Launch the system's default browser navigated to the URL.
    oauth2 = CkOAuth2_Create();
    success = CkOAuth2_LaunchBrowser(oauth2,url);
    if (success == FALSE) {
        printf("%s\n",CkOAuth2_lastErrorText(oauth2));
        CkHttp_Dispose(http);
        CkHttpResponse_Dispose(resp);
        CkHashtable_Dispose(hashTab);
        CkJsonObject_Dispose(json);
        CkFileAccess_Dispose(fac);
        CkStringBuilder_Dispose(sbUrlForBrowser);
        CkOAuth2_Dispose(oauth2);
        return;
    }

    // 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.

    // 


    CkHttp_Dispose(http);
    CkHttpResponse_Dispose(resp);
    CkHashtable_Dispose(hashTab);
    CkJsonObject_Dispose(json);
    CkFileAccess_Dispose(fac);
    CkStringBuilder_Dispose(sbUrlForBrowser);
    CkOAuth2_Dispose(oauth2);

    }