从 swift 中的请求响应中获取 header 数据

Question

我想在 header 请求中获取 X-Dem-Auth swift 以将其存储在我的应用程序中。

查看回复：

headers {
    "Content-Length" = 95;
        "Content-Type" = "application/json; charset=utf-8";
        Date = "Fri, 15 Apr 2016 08:01:58 GMT";
        Server = "Apache/2.4.18 (Unix)";
        "X-Dem-Auth" = null;
        "X-Powered-By" = Express;

Answer 1

如果响应类型为 NSHTTPURLResponse，您可以从 response.allHeaderFields

获得 header

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，例如要获得 X-Dem-Auth 作为响应 header，您可以通过这种方式访问它：

if let httpResponse = response as? NSHTTPURLResponse {
     if let xDemAuth = httpResponse.allHeaderFields["X-Dem-Auth"] as? String {
        // use X-Dem-Auth here
     }
}

更新

根据 Evan R 的评论更新

if let httpResponse = response as? HTTPURLResponse {
     if let xDemAuth = httpResponse.allHeaderFields["X-Dem-Auth"] as? String {
        // use X-Dem-Auth here
     }
}

Answer 2

更新 iOS 13 及以上。

我建议如果响应是 HTTPURLResponse 类型并且您只想获得特定的 header 值。那么下面是一个更好的方法。

if let httpResponse = response as? HTTPURLResponse {
     if let xDemAuth = httpResponse.value(forHTTPHeaderField: "X-Dem-Auth") as? String {
        // use X-Dem-Auth here
     }
}

从 swift 中的请求响应中获取 header 数据

Get header data from a request response in swift

api

rest

http-headers

swift