在Swift中使用Alamofire阻止重定向响应 [英] Prevent redirect response with Alamofire in Swift

问题描述

我正在寻找示例代码，该示例代码如何在请求网络API时防止重定向响应（状态代码3xx）。我在Alamofire 1.2中使用Swift。
我尝试过：

I'm looking for example code how to prevent redirect response (status code 3xx) when request web api. I'm using Swift with Alamofire 1.2. I have tried:

delegate.taskWillPerformHTTPRedirection = { (session: NSURLSession!, task: NSURLSessionTask!, response: NSHTTPURLResponse!, request: NSURLRequest!) in
            return nil
        }

不起作用

我也尝试过： https://github.com/Alamofire/Alamofire/pull/350/files ，并将自己的代码更改为：

I've also tried: https://github.com/Alamofire/Alamofire/pull/350/files and have changed my own code to:

    var acc = self.txtAccount.text
    var pwd = self.txtPassword.text
    var url : String = "http://10.1.0.2:8081/wordpress/wp-json/users/me"
    let delegate = Alamofire.Manager.sharedInstance.delegate
    delegate.taskWillPerformHTTPRedirection = { (session: NSURLSession!, task: NSURLSessionTask!, response: NSHTTPURLResponse!, request: NSURLRequest!) in

        var request = NSMutableURLRequest(URL: NSURL(string: url)!)
        request.HTTPMethod = "GET"

        var credential = "\(acc):\(pwd)"
        var authData = credential.dataUsingEncoding(NSUTF8StringEncoding)
        var encodedAuthData = authData?.base64EncodedStringWithOptions(nil)
        var authValue = "Basic \(encodedAuthData!)"

        request.setValue(authValue, forHTTPHeaderField: "Authorization")
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.setValue("application/json", forHTTPHeaderField: "Accept")
        return request
    }

    //I've implemented URLRequestConvertible 'Router'. it also have call the same above url
    Alamofire.request(Router.Authorize(acc, pwd))
        .response({(request, response, data, error) in
            println(request)
        })

但是它没有用，似乎变成了无限循环。我对查尔斯进行了测试。

But it's not worked and seem like turned to infinite loop. I tested on Charles.

推荐答案

使用AlamoFire 2.4（Xcode7）的替代（代码段）解决方案。就我而言，我一直期望重定向。 （我正在解压缩缩短的链接。）如果request.response调用中的完成运行，这对我来说是错误的。

Alternative (code snippet) solution using AlamoFire 2.4 (Xcode7). In my case, I always expect a redirect. (I am unpacking a shortened link.) If the completion in the request.response call runs, that is an error to me.

func printRedirectUrl() {

    // taskWillPerformHTTPRedirectionWithCompletion: ((NSURLSession, NSURLSessionTask, NSHTTPURLResponse, NSURLRequest, NSURLRequest? -> Void) -> Void)?
    Alamofire.Manager.sharedInstance.delegate.taskWillPerformHTTPRedirectionWithCompletion = { session, task, response, request, completion in
        // request.URL has the redirected URL inside of it, no need to parse the body
        print("REDIRECT Request: \(request)")
        if let url = request.URL {
            print("Extracted URL: \(url)")
        }
        Alamofire.Manager.sharedInstance.delegate.taskWillPerformHTTPRedirection = nil // Restore redirect abilities
        return
    }

    // We expect a redirect, so the completion of this call should never execute
    let url = NSURL(string: "https://google.com")
    let request = Alamofire.request(.GET, url!)
    request.response { request, response, data, error in
        print("Logic Error, response should NOT have been called for request: \(request)")
        Alamofire.Manager.sharedInstance.delegate.taskWillPerformHTTPRedirection = nil // Restore redirect abilities - just in case
    }
}

重定向请求：{URL： https://www.google.com/ }

提取的网址： https://www.google.com/

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