在UIWebView上获取HTTP响应标头 [英] Get HTTP Response header on UIWebView

问题描述

如何从WebView获取HTTP标头响应？我在Stackoverflow上找到了的半解决方案，但它是用Objective-C编写的，无法将其转换为Swift（我尝试过我可怜的Obj-C知识。）

How can I get HTTP headers response from WebView? I've found semi-solutions at Stackoverflow, but it's written on Objective-C and can't convert it to Swift (I've tried with my poor Obj-C knowledge).

Objective-C代码：

Objective-C code:

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    NSCachedURLResponse *resp = [[NSURLCache sharedURLCache] cachedResponseForRequest:webView.request];
    NSLog(@"%@",[(NSHTTPURLResponse*)resp.response allHeaderFields]);
}

1. 该代码将如何看待Swift？


2. 也许现在我们有更好的方法吗？缓存并不总是有效。

推荐答案

Swift

斯威夫特更严格;你想保护自己免受 nil 指针和期权：

Swift is more stringent ; you want to protect yourself against nil pointers and optionals:

• 检查 webView 实际上是否有请求


• 检查请求实际上是否有 NSCachedURLResponse


• 类型 - 检查对 NSHTTPURLResponse的反应

• check that the webView actually has a request
• check that the request actually has a NSCachedURLResponse
• type-check the response against NSHTTPURLResponse

func webViewDidFinishLoad(webView: UIWebView) {
    if let request = webView.request {
        if let resp = NSURLCache.sharedURLCache().cachedResponseForRequest(request) {
            if let response = resp.response as? NSHTTPURLResponse {
                print(response.allHeaderFields)
            }
        }
    }
}

这篇关于在UIWebView上获取HTTP响应标头的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！