Handle Cloudflare Access URLs in the webview, not the browser.

We need to handle this in the webview, as certain cookies will be set after a
successful authentication. Cloudflare will only allow access to the underlying
server if these cookies are present. If the user would authenticate in the browser,
the cookies would be stored there and we would not be able to read them.

app/src/main/java/io/homeassistant/companion/android/webview/WebViewActivity.kt

@@ -113,6 +113,8 @@ import kotlinx.coroutines.withContext
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import org.chromium.net.CronetEngine
 import org.json.JSONObject
+import java.net.MalformedURLException
+import java.net.URL
 import java.util.concurrent.Executors
 import javax.inject.Inject
 import javax.inject.Named
@@ -678,6 +680,16 @@ class WebViewActivity : BaseActivity(), io.homeassistant.companion.android.webvi
     }
 
     private fun shouldLaunchWebBrowser(url: String): Boolean {
+        val parsedUrl = try { URL(url); } catch (e: MalformedURLException) { null }
+        if (parsedUrl?.path?.startsWith("/cdn-cgi/access/") == true) {
+            // This particular path is used by Cloudflare's Access product. We need
+            // to handle this in the webview, as certain cookies will be set after a
+            // successful authentication. Cloudflare will only allow access to the underlying
+            // server if these cookies are present. If the user would authenticate in the browser,
+            // the cookies would be stored there and we would not be able to read them.
+            return false
+        }
+
         return !webView.url.toString().contains(url)
     }