WKWebView setValue forHTTPHeaderField problem

Question

RueiChangTW OP

Created May ’21

Replies 1

Boosts 0

Views 4k

Participants 1

Hello there,

I'm looking for a solution to navigate a URL with header's variable.

I know we can create a request and setValue with forHTTPHeaderField then use WKWebView to load it.

Here is my sample code

struct WebView: UIViewRepresentable {
    
    let startURL: String
    
    func makeUIView(context: Context) -> WKWebView {
        let webView = WKWebView()
        if let url = URL(string: startURL) {
            var request = URLRequest(url: url)
             request.setValue("yourvalue", forHTTPHeaderField: "yourHeaderVariable")
             webView.navigationDelegate = context.coordinator //<<Add your delegates here
              webView.uiDelegate = context.coordinator //<<Add your delegates here
            webView.load(request)
        }
       
        return webView
    }

    func makeCoordinator() -> Coordinator {
    Coordinator()
  }

		class Coordinator: NSObject, WKNavigationDelegate, WKUIDelegate {
		        
		        func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void)
		        {
		            if navigationAction.targetFrame == nil {
		                webView.load(navigationAction.request)
		            }            
             
        print(navigationAction.request.allHTTPHeaderFields)                
		            
		            decisionHandler(.allow)
		        }
		}
}

This method is only able to set header variable with startURL. And there is another link in this webpage, the link doesn't include the header after I click it.

I can use allHTTPHeaderFields to show the content of http headers. And I tried to setValue in the Coordinator, the compiler said "Cannot use mutating member on immutable value: 'request' is a get-only property". I think it means this method is read-only here.

How can I do if I want to have my WKWebView can include the header variable in any links in startURL? Hope my description is clear. Thank you in advance.

My working environment: Xcode 12.5. Language: SwiftUI

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Answer 1

RueiChangTW OP

May ’21

Dear all,

I've been searching the solution for three days. And here is a reference [https://stackoverflow.com/questions/28984212/how-to-add-http-headers-in-request-globally-for-ios-in-swift)

There is an answer which is from Au Ris. His solution is working on my side.

And here is my sample code

var loadUrl = URL(string: "https://www.google.com/")!
if (navigationAction.request.url?.absoluteString.contains("yourURLKeyword") == true){

         
        if(navigationAction.request.url != loadUrl){
          loadUrl = navigationAction.request.url!
          decisionHandler(.cancel)
          var request = URLRequest(url: navigationAction.request.url!)
          request.setValue("yourValue", forHTTPHeaderField: "yourKey")
          webView.load(request)
        } else {
          decisionHandler(.allow)
        }
         
      } else {
         
        decisionHandler(.allow)

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