Ability to intercept URL

[SimplyJaymin]

Hello,
How can I intercept a URL before it is loaded into the webview & stop loading?
I tried the following -
_onStateChanged = flutterWebviewPlugin.onStateChanged.listen((WebViewStateChanged state) { if (state.url.startsWith("someScheme")) { flutterWebviewPlugin.stopLoading(); } });

But the onStateChanged is called after the url has loaded into the webview, so I cannot stop the loading.

[mohammedmunaf]

I have the same issue. Pease help!

[JannieT]

You can intercept on the onUrlChanged event which fires before the WebViewState.startLoad state change. I am using it like this:

webview.onUrlChanged.listen( (String url) async {
    if (!mounted) return;
    
    if (!_isSpecialUrl(url)) return;

    if (await canLaunch(url)) {
      print('diverting: $url');
      webview.stopLoading();
      await launch(url);
    }
    
  });

[mohammedmunaf]

@JannieT No use. Webview doesn't stop loading. callback come to onUrlChanged once the loading already starts, not before loading.

[JannieT]

@mohammed90 works great for me on Flutter v1.2.1, Plugin v0.3.3

This is my event trace:

flutter: onStateChanged: WebViewState.shouldStart https://redacted.com/notes
flutter: onUrlChanged: https://redacted.com/notes
flutter: onStateChanged: WebViewState.startLoad https://redacted.com/notes
flutter: onHttpError: 200 https://redacted.com/notes
flutter: onStateChanged: WebViewState.finishLoad https://redacted.com/notes

[mohammedmunaf]

@JannieT I am also using Plugin v0.3.3 but flutter 1.0.0+1
Below is my console log onUrlChanged is called after WebViewState.startLoad

I/flutter (21612): WebViewState.shouldStart
I/flutter (21612): WebViewState.startLoad
I/flutter (21612): onUrlChanged
I/flutter (21612): WebViewState.finishLoad

[JannieT]

@mohammedmunaf have you tried intercepting at WebViewState.shouldStart?

[mohammedmunaf]

Finally this worked for me! Happy coding 👍 Thanks @JannieT

flutterWebviewPlugin.onStateChanged.listen((WebViewStateChanged state) async {
      if (state.type==WebViewState.shouldStart){
         if(state.url.startsWith('https://www.google.com')){
            flutterWebviewPlugin.stopLoading();
          } 
      }
    });