[Interest] WebView will someone shed some light please

[Konstantin Tokarev]

18.10.2017, 18:15, "Marek.Floriańczyk" <marek.florianczyk at gmail.com>:
> Dnia środa, 18 października 2017 17:26:06 CEST Konstantin Tokarev pisze:
>>  17.10.2017, 17:38, "Marek.Floriańczyk" <marek.florianczyk at gmail.com>:
>>  > Dnia wtorek, 17 października 2017 16:27:05 CEST Jason H pisze:
>>  >> > Sent: Wednesday, October 11, 2017 at 12:47 PM
>>  >> > From: "Marek.Floriańczyk" <marek.florianczyk at gmail.com>
>>  >> > To: interest at qt-project.org
>>  >> > Subject: [Interest] WebView will someone shed some light please
>>  >> >
>>  >> > Hi all,
>>  >> >
>>  >> > I need to ask about QML WebView module.
>>  >> > I'm working on an mobile application that should display single web
>>  >> page
>>  >> > with JS library for webRTC - audio/video transmission.
>>  >> > It looks like web page is loaded, JS library starts up, but I can't
>>  >> access > camera and mic.
>>  >> > With QWebEngineView on Desktop platform it works, this web page also
>>  >> works > when displayed it in chrome browser on the phone.
>>  >> >
>>  >> > From what I understand WebView is a wrapper around platform native web
>>  >> > browser engine, since Android and iOS supports webRTC what is a real
>>  >> > problem with WebView to support access to microphone and camera, like
>>  >> in
>>  >> > QWebEngineView: onFeaturePermissionRequested: {
>>  >> >
>>  >> > grantFeaturePermission(securityOrigin, feature, true);
>>  >> >
>>  >> > }
>>  >> >
>>  >> > Is this some functionality that hasn't been written yet, or is it a
>>  >> deeper > problem, policy or something else.
>>  >> > This is a real showstopper in my project, so I need to ask is it
>>  >> possible > to add some functionality to WebView module to support camera
>>  >> and mic > access even with some support from commercial company and
>>  >> later make this > code an open source contribution to WebView module ?
>>  >>
>>  >> I cringe at the invocation of "show stopper"
>>  >> You can make an app with with camera and webview and coordinate the
>>  >> switch
>>  >> between the two. If you need a full-blown WebUI, then maybe Qt isn't the
>>  >> right choice? I'm thinking React might be better if you're looking for a
>>  >> fully web-driven app.
>>  >
>>  > Hi,
>>  >
>>  > It's not web-driven app, there are push notifications, in app purchase,
>>  > google api authorization and a few more. WebRTC allows me to use some
>>  > "call center" infrastructure with TURN and STUN servers provided by VoIP
>>  > provider. They have commercial JS library where all webRTC communications
>>  > is done. I can access camera no problem, did that for QR codes, but then
>>  > I would have to do all webRTC related stuff myself.
>>
>>  You could use e.g. OpenWebRTC instead of doing all WebRTC stuff yourself
>
> I admit that I'm not an expert. Try to make my living of writing apps in Qt.
>
> However, when I point WebView to opensource webRTC url:
> https://webrtc.github.io/samples/src/content/getusermedia/gum/
>
> the problem is the same: Can't access camera and microphone.
> Please explain me, how open source webRTC should be different in that case ?
>
> There is open source webRTC in Qt and I'm sure it works in QWebEngineView.
>
> But since on mobile platform only available component is a WebView in which I
> can't access camera and microphone what is the difference between opensource
> webRTC and commercial JS library?

JS library is inherently limited by capabilities of underlying web engine. In case of
WebView, this is the same engine as Safari uses, and if you have older iOS version
without Safari 11, you won't get any WebRTC support in your JS.

OTOH there are native libraries which allow using WebRTC on wider range of iOS
versions.

>
> Best Regards
> Marek
>
>>  > Best Regards
>>  > Marek
>>  >
>>  > _______________________________________________
>>  > Interest mailing list
>>  > Interest at qt-project.org
>>  > http://lists.qt-project.org/mailman/listinfo/interest

-- 
Regards,
Konstantin