WKWebviewURLHandler

handler.swift

import Foundation
import WebKit

class GLAssetHandler: NSObject, WKURLSchemeHandler {
    func webView(_ webView: WKWebView, start urlSchemeTask: WKURLSchemeTask) {
      //Check that the url path is of interest for you, etc...
      
      //Create a NSURLResponse with the correct mimetype.
      let urlResponse = URLResponse(url: url, mimeType: "image/jpeg",
                                         expectedContentLength: -1, textEncodingName: nil)
                                         //IMPORTANT: Forward your response to the task.
                                         urlSchemeTask.didReceive(urlResponse)
                                         if let data = asset.decryptedData {
                                            //IMPORTANT: Send your data to the task.
                                            urlSchemeTask.didReceive(data)
                                         }
                                         //IMPORTANT: Tell the task that you're done.
                                         urlSchemeTask.didFinish()
            })
        }
    }

    func webView(_ webView: WKWebView, stop urlSchemeTask: WKURLSchemeTask) {

    }
}