如何使用 Swift 从 NSURLSession 获取 cookie？

Posted 2023-03-10

【中文标题】如何使用 Swift 从 NSURLSession 获取 cookie？

【英文标题】：How to get cookie from a NSURLSession with Swift?

【发布时间】：2015-06-18 05:24:18

【问题描述】：

我有一个 NSURLSession 调用 dataTaskWithRequest 以便以这种方式发送 POST 请求

func makeRequest(parameters: String, url:String)
    var postData:NSData = parameters.dataUsingEncoding(NSASCIIStringEncoding)!
    var postLength:NSString = String(postData.length )
    var request = NSMutableURLRequest(URL: NSURL(string: url)!)
    var session = NSURLSession.sharedSession()
    request.HTTPMethod = "POST"

    var error:NSError?
    //request.HTTPBody = NSJSONSerialization.dataWithJSONObject(postData, options: nil, error: &error)
    request.HTTPBody = postData
    request.setValue(postLength, forHTTPHeaderField: "Content-Length")
    request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
    request.setValue("application/json", forHTTPHeaderField: "Accept")

    var task = session.dataTaskWithRequest(request, completionHandler:  (data, response, error) -> Void in

        println("Response:\(response)")

        // Other stuff goes here

)

响应等于：

<NSHTTPURLResponse: 0x7fcd205d0a00>  URL: http://XXX.XXX.XXX:0000/***   status code: 200, headers 
    "Cache-Control" = "no-store, no-cache, must-revalidate, post-check=0, pre-check=0";
    Connection = close;
    "Content-Length" = 16;
    "Content-Type" = "application/json; charset=utf-8";
    Date = "Mon, 13 Apr 2015 00:07:29 GMT";
    Expires = "Thu, 19 Nov 1981 08:52:00 GMT";
    Pragma = "no-cache";
    Server = "Apache/2.2.15 (CentOS)";
    "Set-Cookie" = "MYCOOKIEIS=12dsada342fdshsve4lorewcwd234; path=/";
    "X-Powered-By" = "php/5.3.14 ZendServer/5.0";
 

我的问题是我不知道如何获取“Set-Cookie”中名为 MYCOOKIEIS 的 cookie。

我将在用户登录时使用它，所以如果用户未登录 -> 登录（调用登录 api）否则转到主屏幕并调用其他 API。

有人可以帮我把 cookie 拿出来吗？

我找到了这个answer，但它是在 Objective-C 中的，我不知道如何使用 Swift 来实现

【参考方案1】：

Swift 版本可能类似于：

let task = session.dataTask(with: request)  data, response, error in
    guard
        let url = response?.url,
        let httpResponse = response as? HTTPURLResponse,
        let fields = httpResponse.allHeaderFields as? [String: String]
    else  return 

    let cookies = HTTPCookie.cookies(withResponseHeaderFields: fields, for: url)
    HTTPCookieStorage.shared.setCookies(cookies, for: url, mainDocumentURL: nil)
    for cookie in cookies 
        var cookieProperties = [HTTPCookiePropertyKey: Any]()
        cookieProperties[.name] = cookie.name
        cookieProperties[.value] = cookie.value
        cookieProperties[.domain] = cookie.domain
        cookieProperties[.path] = cookie.path
        cookieProperties[.version] = cookie.version
        cookieProperties[.expires] = Date().addingTimeInterval(31536000)

        let newCookie = HTTPCookie(properties: cookieProperties)
        HTTPCookieStorage.shared.setCookie(newCookie!)

        print("name: \(cookie.name) value: \(cookie.value)")
    

task.resume()

【讨论】：

在执行某种“注销”时不要忘记删除 cookie。检查下面的@Mellian 回复

请记住，有些 cookie 不会出现在 httpResponse.allHeaderFields 下。您将不得不使用 ios 提供的共享 cookie 存储。

我明白了，但是如果我想在运行任务之前设置一个 cookie 值，例如 JSESSIONID，该怎么办？

拯救了我的一周。非常感谢

【参考方案2】：

我遇到了同样的问题：这会获取、设置或删除 cookie：

func showCookies() 

    let cookieStorage = NSHTTPCookieStorage.sharedHTTPCookieStorage()
    //println("policy: \(cookieStorage.cookieAcceptPolicy.rawValue)")

    let cookies = cookieStorage.cookies as! [NSHTTPCookie]
    println("Cookies.count: \(cookies.count)")
    for cookie in cookies 
        var cookieProperties = [String: AnyObject]()

        cookieProperties[NSHTTPCookieName] = cookie.name
        cookieProperties[NSHTTPCookieValue] = cookie.value
        cookieProperties[NSHTTPCookieDomain] = cookie.domain
        cookieProperties[NSHTTPCookiePath] = cookie.path
        cookieProperties[NSHTTPCookieVersion] = NSNumber(integer: cookie.version)
        cookieProperties[NSHTTPCookieExpires] = cookie.expiresDate
        cookieProperties[NSHTTPCookieSecure] = cookie.secure

        // Setting a Cookie
        if let newCookie = NSHTTPCookie(properties: cookieProperties) 
            // Made a copy of cookie (cookie can't be set)
            println("Newcookie: \(newCookie)")
            NSHTTPCookieStorage.sharedHTTPCookieStorage().setCookie(newCookie)
        
        println("ORGcookie: \(cookie)")
    


func deleteCookies() 

    let cookieStorage = NSHTTPCookieStorage.sharedHTTPCookieStorage()
    let cookies = cookieStorage.cookies as! [NSHTTPCookie]
    println("Cookies.count: \(cookies.count)")
    for cookie in cookies 
        println("name: \(cookie.name) value: \(cookie.value)")
        NSHTTPCookieStorage.sharedHTTPCookieStorage().deleteCookie(cookie)
    

    //Create newCookie: You need all properties, because else newCookie will be nil (propertie are then invalid)
    var cookieProperties = [String: AnyObject]()
    cookieProperties[NSHTTPCookieName] = "locale"
    cookieProperties[NSHTTPCookieValue] = "nl_NL"
    cookieProperties[NSHTTPCookieDomain] = "www.digitaallogboek.nl"
    cookieProperties[NSHTTPCookiePath] = "/"
    cookieProperties[NSHTTPCookieVersion] = NSNumber(integer: 0)
    cookieProperties[NSHTTPCookieExpires] = NSDate().dateByAddingTimeInterval(31536000)
    var newCookie = NSHTTPCookie(properties: cookieProperties)
    println("\(newCookie)")
    NSHTTPCookieStorage.sharedHTTPCookieStorage().setCookie(newCookie!)

【参考方案3】：

请参阅上面的答案，但对于 Swift 3，您需要这样的内容：

    var cookieProperties = [HTTPCookiePropertyKey:Any]()

    cookieProperties[HTTPCookiePropertyKey.name] = "foo"
    cookieProperties[HTTPCookiePropertyKey.value] = "bar"
    cookieProperties[HTTPCookiePropertyKey.path] = "baz"
    cookieProperties[HTTPCookiePropertyKey.domain] = ".example.com"

    let cookie = HTTPCookie(properties: cookieProperties)

【参考方案4】：

试试这个代码：

guard let realResponse = response as? HTTPURLResponse, realResponse.statusCode == 200 else 
    print("Not a 200 response")
    return


let fields = realResponse.allHeaderFields as? [String :String]

if let cookies = HTTPCookie.cookies(withResponseHeaderFields: fields!, for: response!.url!) 
    for cookie in cookies 
        print("name: \(cookie.name) value: \(cookie.value)")
    

【参考方案5】：

Swift 3/4，简洁的解决方案：

let cookieName = "MYCOOKIE"
if let cookie = HTTPCookieStorage.shared.cookies?.first(where:  $0.name == cookieName ) 
    debugPrint("\(cookieName): \(cookie.value)")

【讨论】：

谢谢，简单易行！