On Thu, Oct 12, 2017 at 5:23 AM Andrea Giammarchi < andrea.giammar...@gmail.com> wrote:
> FWIW I've used the location with a private channel as protocol to > intercept calls to/from the page and GJS. > > https://github.com/WebReflection/jsgtk-twitter/blob/master/app#L162-L175 > > The channel is a random string: > https://github.com/WebReflection/jsgtk-twitter/blob/master/app#L59 > > From the page, which is aware of the "secret" channel, I call GJS actions > via location.href = > `secret1234:method(${encodeURIComponent(JSON.stringify(value))})`; > > The protocol secret1234 is intercepted and the > `controller.method(JSON.parse(decodeURIComponent(restOfURI)))` invoked. > > To signal the page everything is fine I use this.webView.runJavaScript > https://github.com/WebReflection/jsgtk-twitter/blob/master/app#L377 > > The page has a listener for the `secret1234` event on the main window, and > such listener is instrumented to react accordingly with the CustomEvent > .detail payload/info. > > This might look a bit convoluted, and it has JSON serialization as > limitation for the kind of data you want to pass (i.e. I use base64 encoded > images as source from remotely fetched files enabling somehow CORS for > whatever I want) but it worked well, circumventing the missing > communication channel available in Qt. > > Maybe today there are better ways for doing a similar thing and if that's > the case, please share. > Here is another, fairly new, way to do it. Start out by registering a "script message handler": http://devdocs.baznga.org/webkit240~4.0_api/webkit2.usercontentmanager#method-register_script_message_handler To send a message to the page, use the same thing that Andrea uses: http://devdocs.baznga.org/webkit240~4.0_api/webkit2.webview#method-run_javascript To send a message from the page to the GJS program, use the postMessage() method mentioned in the documentation, and connect to this signal in your GJS program to receive the message: http://devdocs.baznga.org/webkit240~4.0_api/webkit2.usercontentmanager#signal-script-message-received Although I just realized that unfortunately the values won't be able to be marshalled into GJS since you need to use the JavaScriptCore API to get at them. This is a really nice method in C, but in JS you can only use it to send a message without any content. That is annoying. I should probably open up an issue about this. On Wed, Oct 11, 2017 at 12:57 PM, Adriano Patrizio < > adriano.patri...@hotmail.com> wrote: > >> Thank you for response, this is my problem: have necessity to implement >> methods into my web application webkit2 based and comunicate with GJS >> script (example: filesystem functions to read and write files or window >> managment). >> > Regards, Philip C
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