从 WKWebview 检索 HTTP 响应标头

Posted 2023-02-23

【中文标题】从 WKWebview 检索 HTTP 响应标头

【英文标题】：Retrieve HTTP response headers from WKWebview

【发布时间】：2016-12-13 19:05:44

【问题描述】：

我需要从WKWebview 的请求中读取响应HTTP 标头。我需要根据服务器发送的某些自定义标头执行自定义。无法在响应数据中添加此信息。

我在文档和以前的问题中都找不到任何条目。有什么办法吗？

【参考方案1】：

您似乎可以从WKNavigationDelegate 方法webView:decidePolicyFor:decisionHandler: 访问响应。

设置一些对象为WKWebView的navigationDelegate，并添加这个方法：

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

    decisionHandler(WKNavigationResponsePolicyAllow);

【参考方案2】：

NobodyNada 回答的 Swift 3.1、4 和 5 版本：

没有强制施法

func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) 
    if let response = navigationResponse.response as? HTTPURLResponse 
        let headers = response.allHeaderFields
        //do something with headers
    
    decisionHandler(.allow)

强制施法：

func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) 
    let headers = (navigationResponse.response as! HTTPURLResponse).allHeaderFields
    //do something with headers 
    decisionHandler(.allow)

【参考方案3】：

Swift 4.2 Answers with response.
func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void)
 
   let response = navigationResponse.response as? HTTPURLResponse
       decisionHandler(.allow)

【参考方案4】：

您可以从委托方法中检索(WKNavigationResponse*)navigationResponse。您可以从 navigationResponse 对象中获取响应本身：

- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler 

     NSHTTPURLResponse * response = (NSHTTPURLResponse *)navigationResponse.response;