swift - 如何检索请求的 Alamofire 响应 header

Question

如何检索请求的响应 header ？以下是我提出的要求。

Alamofire.request(.GET, requestUrl, parameters:parameters, headers: headers)
        .responseJSON { response in switch response.result {
        case .Success(let JSON):

            ...

        case .Failure(let error):

            ...

    }

提前致谢!

Answer 1

如果响应是 NSHTTPURLResponse 类型，您可以从 response.allHeaderFields 获取 header 。

因此，当您使用 Alamofire responseJSON 时，您可以像这样访问 NSHTTPURLResponse 属性:

Alamofire.request(.GET, requestUrl, parameters:parameters, headers: headers).responseJSON {
        response in
        print(response.response?.allHeaderFields)
}

正如苹果文档所说:

A dictionary containing all the HTTP header fields received as part of the server’s response. By examining this dictionary clients can see the “raw” header information returned by the HTTP server.

The keys in this dictionary are the header field names, as received from the server. See RFC 2616 for a list of commonly used HTTP header fields.

因此，例如，要在响应 header 中获取内容类型，您可以通过这种方式访问​​它:

if let contentType = response.response?.allHeaderFields["Content-Type"] as? String {
        // use contentType here
}