window.CDV_ASSETS_URL is undefined, leading to nothing being proxied

[mattdsteele]

Describe the bug

See my comment in #3 for more details.

Environment: in a new Cordova application (built with cordova create) and these plugins installed:

    <plugin name="cordova-plugin-webview-proxy" spec="0.0.3" />
    <engine name="ios" spec="^6.2.0" />

I'm launching the application on an iPhone running iOS 14.4 and opening the Safari Developer Tools.

Running window.WebviewProxy.convertProxyUrl('https://example.com')); returns https://example.com, with no new protocol prefixed. As a result, requests are not proxied through this plugin, and requests to external servers fail for CORS reasons.

Investigating further, I see that window.CDV_ASSETS_URL returns undefined, which results in this line being returned: https://github.com/GEDYSIntraWare/cordova-plugin-webview-proxy/blob/master/www/WebviewProxy.js#L8

Any idea why this might be happening? I can verify that the platform is on the latest version (running cordova.platformVersion === 6.2.0).

[NiklasMerz]

Is your app running on a custom scheme? This is now part of cordova-ios (apache/cordova-ios#781). You need to set a scheme and hostname in config.xml to make your app run on let's say app://myapp instead of file://index.html and this proxy just works with the custom scheme.

We might need to document this in the documentation for cordova-ios.

[mattdsteele]

Yup, that was the issue! I've added a custom scheme in my config.xml

        <allow-navigation href="cdv://*" />
        <preference name="scheme" value="cdv" />
        <preference name="hostname" value="foobar" />

And I'm able to proxy requests now; the requests now have a prefix of cdv://foobar/_https_proxy_

I am still not seeing cookies being sent, but I'll focus that on the original #3 ticket.

Thank you!