如何使用 Swift 从 NSURLSession 获取 cookie?
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【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
【问题讨论】:
【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!)
【讨论】:
【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)
【讨论】:
【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)")
【讨论】:
【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!以上是关于如何使用 Swift 从 NSURLSession 获取 cookie?的主要内容,如果未能解决你的问题,请参考以下文章
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