WKWebView CORS Solution: ProcessResult.swift

ProcessResult.swift

if let error = error {
    let js = "window.jsCallbackBridge.resolvePromise('\(uuid)', null, '\(error.localizedDescription)')"
    DispatchQueue.main.async {
       self.webView?.evaluateJavaScript(js, completionHandler: nil)
    }
    return
}

guard let response = response as? HTTPURLResponse, (200...299).contains(response.statusCode) else {
    let js = "window.jsCallbackBridge.resolvePromise('\(uuid)', null, 'server error')"
    DispatchQueue.main.async {
        self.webView?.evaluateJavaScript(js, completionHandler: nil)
    }

    return
}

if let data = data, let jsonString = String(data: data, encoding: .utf8) {
    // Use base64 string to avoid parse issue
    let base64Str = Data(jsonString.utf8).base64EncodedString()
    let js = "window.jsCallbackBridge.resolvePromise('\(uuid)', '\(base64Str)', null)"
    DispatchQueue.main.async {
        self.webView?.evaluateJavaScript(js, completionHandler: nil)
    }
}