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Swift 3/4 Web API Examples

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(Swift 3/4) GeoOp OAuth2 Authorisation Code Grant (Public App)

Demonstrates how to get an access token for a GeoOp Third-Party Public Application using the Authorisation Code Grant flow.

Note: This example requires Chilkat v9.5.0.63 or greater.

Chilkat Downloads for the Swift Programming Language

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

iOS Objective-C/Swift Libs

func chilkatTest() {
    // Note: This example requires Chilkat v9.5.0.63 or greater.

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

    let oauth2 = CkoOAuth2()!
    var success: Bool

    // This should match the Site URL configured for your GeoOp Application, such as "http://localhost:3017/"
    oauth2.listenPort = 3017

    oauth2.authorizationEndpoint = "https://login.geoop.com/oauth2/code"
    oauth2.tokenEndpoint = "https://login.geoop.com/oauth2/token"

    // Replace the client ID with an actual value.
    oauth2.clientId = "GEOOP-CLIENT-ID"
    // The ClientSecret should remain empty for a GeoOp public application
    oauth2.clientSecret = ""

    // We need a few special settings for GeoOp
    oauth2.scope = "default"
    oauth2.codeChallenge = false
    // Setting LocalHost equal to "none" prevents the "redirect_uri" query param from being sent in the initial HTTP request.
    // Note: The GeoOp Application should still have a redirect URL specified as "http://localhost:3017/", where the port
    // number matches the ListenPort above.
    oauth2.localHost = "none"

    // Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
    var url: String? = oauth2.start()
    if oauth2.lastMethodSuccess != true {
        print("\(oauth2.lastErrorText!)")
        return
    }

    // 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
    // The GeoOp account owner would interactively accept or deny the authorization request.
    // System.Diagnostics.Process.Start(url);

    // 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...

    // Now wait for the authorization.
    // We'll wait for a max of 30 seconds.
    var numMsWaited: Int = 0
    while (numMsWaited < 30000) && (oauth2.authFlowState.intValue < 3) {
        oauth2.sleepMs(100)
        numMsWaited = numMsWaited + 100
    }

    // If there was no response from the browser within 30 seconds, then 
    // the AuthFlowState will be equal to 1 or 2.
    // 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
    // 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
    // In that case, cancel the background task started in the call to StartAuth.
    if oauth2.authFlowState.intValue < 3 {
        oauth2.cancel()
        print("No response from the browser!")
        return
    }

    // Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
    // The possible AuthFlowState values are:
    // 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
    // 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
    // 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
    if oauth2.authFlowState.intValue == 5 {
        print("OAuth2 failed to complete.")
        print("\(oauth2.failureInfo!)")
        return
    }

    if oauth2.authFlowState.intValue == 4 {
        print("OAuth2 authorization was denied.")
        print("\(oauth2.accessTokenResponse!)")
        return
    }

    if oauth2.authFlowState.intValue != 3 {
        print("Unexpected AuthFlowState:\(oauth2.authFlowState.intValue)")
        return
    }

    print("OAuth2 authorization granted!")
    print("Access Token = \(oauth2.accessToken!)")

    // Save the entire JSON response, which includes the access token, for future calls.
    // The JSON AccessTokenResponse looks like this:
    // {"access_token":"e6dqdG....mzjpT04w==","token_type":"Bearer","expires_in":2592000,"owner_id":984236}

    let fac = CkoFileAccess()!
    fac.writeEntireTextFile("qa_data/tokens/geoop.json", fileData: oauth2.accessTokenResponse, charset: "utf-8", includePreamble: false)

    print("Success.")

}

 

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