Radcaptcha audio not working in Safari

[Pradeep]

I am using .wav files to generate the audio. It works in all the popular browsers except Safari. I am using the latest version of safri and also have quicktime installed too but still it didn't work. Have anyone faced this issue earlier .  Can anyone help with this issue.

[Princy]

Hello Pradeep,

Take a look at the following forum thread.
Captcha audio not working in MAC os.

Thanks,
Princy.

[Pradeep]

Thanks for the reply Princy. But it not specific to MAC. even Windows version of Safari doesn't play the audio. I have to use the wav files to render the audio. According to the thread, since latest version of Safari supports html 5, it should be able to play those wav files but unfortunately I couldn't make it work.

Should I have to do anything specific to Safari to make it work ?

[Slav]

Hello Pradeep,

Please ensure that you have properly installed the QuickTime plugin as it is required to play the .wav files of the RadCaptcha under the Safari browser.

You can check if the problem is reproducible in the online demo Captcha Audio Code and if not, please send us a sample runnable page that isolates the problem so that we can inspect it locally and pinpoint the cause.

Regards,
Slav
the Telerik team

[David]

test.
sorry, it was a mistake.

[Paul D.]

I did enter a support ticket but...

The Demo RadCaptcha page's audio won't play on an Iphone and apparently also an Ipad.

[Pero]

Hi Paul,

The iPhone and iPad use the same browser, mobile Safari. The RadCaptcha audio code cannot be played under mobile Safari, because the browser doesn't support <embed/> and the HTML5 <audio/> tags.
You could force download of the audio file when the user clicks to play the audio, if the browser does not support these tags. This can be done with the following custom JavaScript code. Please paste it below your ScriptManager control on the page where the RadCaptcha resides:

<script type="text/javascript">
    Telerik.Web.UI.RadCaptcha.prototype._createAudioElements = function ()
    {
        var audioUrl = this.get_audioUrl();
        var audioLink = this.get_audioLink();

        $addHandlers(audioLink, { "click": this.onAudioPlay }, this);

        var element = audioLink.parentNode;
        this._audioElement = this._createAudioElement(audioUrl);
        element.appendChild(this._audioElement);

        // Opera 10, Safari 4 and Firefox 3.5 support WAV, but Chrome 3 doesn't.
        // IE6,7 and 8 do not support <audio/>
        var doesNotSupportAudio = (!this._supportsAudio() || (this._audioElement && this._audioElement.canPlayType && !this._audioElement.canPlayType("audio/wav")));
        if (doesNotSupportAudio)
        {
            var _qtInstalled = IsQTInstalled();
            if (_qtInstalled)
            {
                this._objectElement = this._createObjectElement(audioUrl);
                element.appendChild(this._objectElement);
            }
            else
            {
                this.downloadFile = true;
            }
        }
        else
        {
            audioLink.setAttribute('href', "#");
        }
    }

    Telerik.Web.UI.RadCaptcha.prototype.onAudioPlay = function (e)
    {
        if (this._objectElement)
        {
            this._objectElement.Play();
        }
        else if (this._audioElement && this._audioElement.play)
        {
            //Chrome supports <audio/>, but the audio is played only once. That's why we need
            //to load the audio file explicitly
            if ($telerik.isChrome)
            {
                this._audioElement.load();
            }
            this._audioElement.play();
        }

        if (!this.downloadFile)
        {
            return $telerik.cancelRawEvent(e);
        }
    }

    function IsQTInstalled()
    {
        var isInstalled = false;
        var qtVersion = null;
        if (window.ActiveXObject)
        {
            var control = null;
            try
            {
                control = new ActiveXObject('QuickTime.QuickTime');
            }
            catch (e)
            {
                // Do nothing
            }

            if (control)
            {
                // In case QuickTimeCheckObject.QuickTimeCheck does not exist
                isInstalled = true;
            }

            try
            {
                // This generates a user prompt in Internet Explorer 7
                control = new ActiveXObject('QuickTimeCheckObject.QuickTimeCheck');
            }
            catch (e)
            {
                return isInstalled;
            }

            if (control)
            {
                // In case QuickTime.QuickTime does not exist
                isInstalled = true;

                // Get version
                qtVersion = control.QuickTimeVersion.toString(16); // Convert to hex
                qtVersion = qtVersion.substring(0, 1) + '.' + qtVersion.substring(1, 3);
                qtVersion = parseFloat(qtVersion);
            }
        }
        else
        {
            // Check navigator.plugins for "QuickTime Plug-in"
            if (navigator.plugins)
            {
                for (i = 0; i < navigator.plugins.length; i++)
                {
                    if (navigator.plugins[i].name.indexOf("QuickTime") >= 0)
                    {
                        isInstalled = true;
                    }
                }
            }

        }
        return isInstalled;
    }
</script>

All the best,
Pero
the Telerik team

[Missing User]

Just checking to see if this is still the recommended solution for getting audio for the RadCaptcha control to work on mobile devices.

Will this javascript solution be the best solution for all mobile platforms (eg. iPhone, Android, Windows, etc.)?

Thanks in advance for your help.

[Slav]

Hi John,

We will add RadCaptcha audio iOS support with the upcoming release of UI for ASP.NET AJAX that is scheduled for the end of February, which should make it possible to use the audio functionality in the major mobile platforms.

You can test the captcha audio earlier by downloading the Beta that will be released next week. If you still encounter difficulties, feel free to send a bug report that describes the issue and how it can be reproduced.

Regards,
Slav
Telerik

 

 

[Missing User]

Thanks Slav.  So, will the audio captcha functionality that is released in next week's beta release work on iOS, Android, and Windows phone platforms?

Also, I'm wondering if you have any code examples of RadCaptcha working with kendo.  (i.e. using client-side code to do the server-side captcha verifcation using kendoUI).  Thanks in advance for your help!

[Slav]

Hello John,

Indeed, the audio functionality should be working in the Beta release as I mentioned in my previous post.

As for the RadCaptcha validation, there is not an example with Kendo UI integration, nevertheless the captcha code cannot be validated on the client, which is what you are asking for if I understand you correctly.

Regards,
Slav
Telerik

 

 

[Missing User]

Thanks Slav - Let me ask the question this way:  Can you provide an example where the server-side captcha validation is done via an ajax call?  e.g. Is there a way CaptchaFile1.aspx can do an ajax call to CaptchaFile2.aspx which does the validation and sends back a Success or Fail result?

[Slav]

Hi John,

You could AJAX-enable the RadCaptcha control by placing it in an UpdatePanel. This way you can perform a validation of the captcha by triggering an asynchronous postback that updates only the part of the page that is wrapped in the UpdatePanel.

I attached a sample page to demonstrate this so that you can check whether such an approach can be used in your project.

Regards,
Slav
Telerik