Crosswalk Error: “Request was denied for security reasons”
This error message typically occurs when a Crosswalk browser tries to access a resource that’s blocked by security settings. It can be caused by several factors, and understanding the root cause is crucial to fixing the issue.
Common Causes
- Strict Content Security Policy (CSP): Your website might have a CSP configured that disallows access to certain resources, including those from Crosswalk.
- Mixed Content Blocking: If your website uses HTTPS but tries to load content (images, scripts) over HTTP, modern browsers (including Crosswalk) will block these mixed requests due to security concerns.
- Cross-Origin Resource Sharing (CORS) Issues: If the resource you’re trying to access is on a different domain than the one you’re currently on, CORS headers need to be set correctly on the server to allow access.
- HTTP Referrer Policy: The Referrer Policy controls how much information is sent with requests, and it might be configured to restrict access from Crosswalk.
- Network Proxy Settings: Proxies can sometimes interfere with requests, particularly if Crosswalk is configured to bypass them.
- App Manifest Permissions: For hybrid apps using Crosswalk, the app manifest may need to request specific permissions (like network access) to allow the app to make requests.
Troubleshooting Steps
- Check CSP Configuration: Inspect your website’s `Content-Security-Policy` HTTP header for any restrictions that might be blocking Crosswalk requests.
- Verify Mixed Content: Ensure all resources on your website are loaded over HTTPS. If necessary, update links and scripts to use secure protocols.
- Examine CORS Headers: If accessing resources from different domains, verify that the server is sending the correct CORS headers (like `Access-Control-Allow-Origin`) to allow Crosswalk requests.
- Adjust Referrer Policy: Modify the Referrer Policy on your website to ensure it doesn’t restrict requests from Crosswalk.
- Test Without Proxy: Temporarily disable any network proxies to see if they are interfering with requests.
- Review App Manifest Permissions: For hybrid apps, make sure the app manifest requests the necessary permissions for network access and other required functionalities.
- Check Crosswalk Version: Update Crosswalk to the latest version. Sometimes older versions may have compatibility issues.
- Consult Documentation: Refer to the Crosswalk documentation for detailed troubleshooting tips and specific instructions for your platform.
Example Code
Content Security Policy
This CSP policy allows scripts only from the same origin, potentially blocking Crosswalk requests from different domains.
Content-Security-Policy: script-src 'self'
CORS Header
This server header allows requests from a specific origin (replace ‘example.com’ with your domain).
Access-Control-Allow-Origin: http://example.com
Table of Common Solutions and Corresponding Errors
| Problem | Solution | Error Message |
|---|---|---|
| Mixed Content | Load all resources over HTTPS | “Mixed Content: The page at ‘https://…’ was loaded over HTTPS, but requested an insecure resource from ‘http://…’.” |
| Strict CSP | Relax CSP or allow Crosswalk origin | “The page at ‘https://…’ was blocked due to a Content Security Policy restriction.” |
| CORS Issue | Configure CORS headers on the server | “The ‘Access-Control-Allow-Origin’ header is missing.” |