Listen to requests

[dudizimber]

Description

Hi,
I'm developing an app where the user is required to do few things in different websites, and I have to detect whether he completed that task or not.
In a few websites I can simply inject some javascript and send a message back to the app, but there are some websites that I cannot to that since they block inline javascript, or that's what I understood (Ex: twitter.com).
So looking for other option, I stumbled across the "chrome.webRequest" API which is used to listen to requests made from a page. However it looks like this API is mainly for extensions.

I wonder if it is possible to do something like that with InAppWebView package.

Thank you.

[pichillilorenzo]

There are also other ways to execute some javascript that is not restricted to injecting a javascript file! You can also use:

• controller.evaluateJavascript(source: "");
• controller.loadUrl(url: "javascript:(function(){ ... here some javascript ... })();");

For example, I loaded "https://twitter.com/home" and it works:

...

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
            title: Text("InAppWebView")
        ),
        body: Container(
            child: Column(children: <Widget>[
              Expanded(
                child: Container(
                  child: InAppWebView(
                    initialUrl: "https://twitter.com/home",
                    initialHeaders: {},
                    initialOptions: InAppWebViewWidgetOptions(
                      inAppWebViewOptions: InAppWebViewOptions(
                        debuggingEnabled: true,
                      )
                    ),
                    onWebViewCreated: (InAppWebViewController controller) {
                      webView = controller;
                    },
                    onLoadStart: (InAppWebViewController controller, String url) {

                    },
                    onLoadStop: (InAppWebViewController controller, String url) {
                      controller.evaluateJavascript(source: "alert('HI');");
                      controller.loadUrl(url: "javascript:(function(){ alert('HI'); })();");
                    },
                  ),
                ),
              ),
            ]))
    );
  }

...

However, chrome APIs, such as chrome.webRequest, are only for Chrome Extension! These APIs are not Android WebView APIs (that are here).

[dudizimber]

There are also other ways to execute some javascript that is not restricted to injecting a javascript file! You can also use:

* `controller.evaluateJavascript(source: "");`

* `controller.loadUrl(url: "javascript:(function(){ ... here some javascript ... })();");`

For example, I loaded "https://twitter.com/home" and it works:

...

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
            title: Text("InAppWebView")
        ),
        body: Container(
            child: Column(children: <Widget>[
              Expanded(
                child: Container(
                  child: InAppWebView(
                    initialUrl: "https://twitter.com/home",
                    initialHeaders: {},
                    initialOptions: InAppWebViewWidgetOptions(
                      inAppWebViewOptions: InAppWebViewOptions(
                        debuggingEnabled: true,
                      )
                    ),
                    onWebViewCreated: (InAppWebViewController controller) {
                      webView = controller;
                    },
                    onLoadStart: (InAppWebViewController controller, String url) {

                    },
                    onLoadStop: (InAppWebViewController controller, String url) {
                      controller.evaluateJavascript(source: "alert('HI');");
                      controller.loadUrl(url: "javascript:(function(){ alert('HI'); })();");
                    },
                  ),
                ),
              ),
            ]))
    );
  }

...

However, chrome APIs, such as chrome.webRequest, are only for Chrome Extension! These APIs are not Android WebView APIs (that are here).

I'll definitely try that!
Thank you very much!