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fix(android): block initial URL load in sandbox mode #16

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Merged
janicduplessis merged 1 commit into from
Apr 15, 2026
Merged

fix(android): block initial URL load in sandbox mode #16

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10 changes: 10 additions & 0 deletions android/src/main/java/com/reactnativecommunity/webview/RNCWebViewClient.java
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,15 @@ public void onPageStarted(WebView webView, String url, Bitmap favicon) {

RNCWebView reactWebView = (RNCWebView) webView;

// Block initial loads to non-allowed domains (shouldOverrideUrlLoading
// doesn't fire for the initial source URL)
String host = Uri.parse(url).getHost();
if (host != null && !reactWebView.isHostAllowed(host)) {
reactWebView.stopLoading();
this.onReceivedError(webView, -1, "Navigation blocked by sandbox: " + url, url);
return;
}

reactWebView.callInjectedJavaScriptBeforeContentLoaded();
}

Expand All @@ -103,6 +112,7 @@ public boolean shouldOverrideUrlLoading(WebView view, String url) {
final boolean isJsDebugging = rncWebView.getReactApplicationContext().getJavaScriptContextHolder().get() == 0;
if(!rncWebView.isHostAllowed(Uri.parse(url).getHost())){
rncWebView.stopLoading();
this.onReceivedError(view, -1, "Navigation blocked by sandbox: " + url, url);
return true;
}

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