Retrieve HTTP response headers from WKWebview

Question

I need to read the response HTTP headers from a WKWebview's request. I need to perform customizations based on certain custom headers sent by the server. It's not possible to add this information in the response data.

I could not find any entry in the documentation nor in previous questions here. Is there any way to do that?

Answer 1

It looks like you can access the response from the WKNavigationDelegate method webView:decidePolicyFor:decisionHandler:.

Set some object as the WKWebView's navigationDelegate, and add this method:

- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
    NSDictionary *headers = ((NSHTTPURLResponse *)navigationResponse.response).allHeaderFields;

    decisionHandler(WKNavigationResponsePolicyAllow);
}