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Swift 3/4 Web API Examples

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(Swift 3/4) 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".

Chilkat Downloads for the Swift Programming Language

MAC OS X (Cocoa) Objective-C/Swift Libs

iOS Objective-C/Swift Libs

func chilkatTest() {
    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var consumerKey: String? = "ETRADE_CONSUMER_KEY"
    var consumerSecret: String? = "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:
    var requestTokenUrl: String? = "https://apisb.etrade.com/oauth/request_token"

    let http = CkoHttp()!
    var success: Bool = true

    http.oAuth1 = true
    http.oAuthConsumerKey = consumerKey
    http.oAuthConsumerSecret = consumerSecret
    http.oAuthCallback = "oob"

    var resp: CkoHttpResponse? = http.quickGetObj(requestTokenUrl)
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    // If successful, the resp.BodyStr contains something like this:  
    // oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
    print("\(resp!.bodyStr!)")

    let hashTab = CkoHashtable()!
    hashTab.addQueryParams(resp!.bodyStr)

    var requestToken: String? = hashTab.lookupStr("oauth_token")
    var requestTokenSecret: String? = hashTab.lookupStr("oauth_token_secret")
    http.oAuthTokenSecret = requestTokenSecret

    resp = nil

    print("oauth_token = \(requestToken!!)")
    print("oauth_token_secret = \(requestTokenSecret!!)")

    // Save this request token for the next step..
    let json = CkoJsonObject()!
    json.append("oauth_token", value: requestToken)
    json.append("oauth_token_secret", value: requestTokenSecret)

    let fac = CkoFileAccess()!
    fac.writeEntireTextFile("qa_data/tokens/etrade_request_token.json", fileData: json.emit(), charset: "utf-8", includePreamble: 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.
    var authorizeUrl: String? = "https://us.etrade.com/e/t/etws/authorize"

    let sbUrlForBrowser = CkoStringBuilder()!
    sbUrlForBrowser.append(authorizeUrl)
    sbUrlForBrowser.append("?key=")
    sbUrlForBrowser.append(consumerKey)
    sbUrlForBrowser.append("&token=")
    sbUrlForBrowser.append(requestToken)
    var url: String? = 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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