Intercept request with WKWebView

Question

Now i\'m using UIWebView and with canInitWithRequest: of NSURLProtocol i can intercept all requests and do with it what I want.

In

Answer 1

there are many ways to implement intercepter request.

1. setup a local proxy, use WKNavigationDelegate

   -[ViewController webView:decidePolicyForNavigationAction:decisionHandler:]
   

   load new request and forward to local server, and at the local server side you can do something(eg. cache).

2. private api. use WKBrowsingContextController and custom URLProtocol

   Class cls = NSClassFromString(@"WKBrowsingContextController");
   SEL sel = NSSelectorFromString(@"registerSchemeForCustomProtocol:");
   if ([(id)cls respondsToSelector:sel]) {
       // 把 http 和 https 请求交给 NSURLProtocol 处理
       [(id)cls performSelector:sel withObject:@"http"];
       [(id)cls performSelector:sel withObject:@"https"];
   }
   

3. use KVO to get system http/https handler.(ios 11, *)

   WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
   URLSchemeHandler *schemeHandler = [[URLSchemeHandler alloc] init];
   [configuration setURLSchemeHandler:schemeHandler forURLScheme:@"test"];
   NSMutableDictionary *handlers = [configuration valueForKey:@"_urlSchemeHandlers"];
   handlers[@"http"] = schemeHandler;
   handlers[@"https"] = schemeHandler;
   

   all the three ways you probably need handle CORS & post bodies to be stripped,you overwrite change browser`s option request( Preflighted_requests),you can custom http header to replace http body for post bodies to be stripped.