NSURLSession身份验证

Question

我试图使用swift代码在网站上找到这里，但响应是html代码与两个错误：“您必须输入密码！”和“您必须输入用户名！”我是NSURLSession的新手，试图更改用于身份验证的字符串，但无法更改响应。下面是我的代码：

 let config = NSURLSessionConfiguration.defaultSessionConfiguration()
 let userPasswordString = "[e-mail]:password"
 let userPasswordData = userPasswordString.dataUsingEncoding(NSUTF8StringEncoding)
 let base64EncodedCredential = userPasswordData!.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding64CharacterLineLength)
 let authString = "Basic \(base64EncodedCredential)"
 config.HTTPAdditionalHeaders = ["Authorization" : authString]
 let session = NSURLSession(configuration: config)
    var running = false
        let url = NSURL(string: "https://hac.chicousd.org/")
        let task = session.dataTaskWithURL(url!) {
            (let data, let response, let error) in
            if (response as? NSHTTPURLResponse) != nil {
                let dataString = NSString(data: data!, encoding: NSUTF8StringEncoding)
                print(dataString)
            }
            running = false
        }

        running = true
        task.resume()

        while running {
            print("waiting...")
            sleep(1)
        }

这是控制台响应中的内容：

<!-- Start Error box -->
<div id="errorContainer" class="alert alert-danger" style="display:none;">
<button id="portalCloseError" type="button" class="close"> &times;</button>
<span id="errorMessage" class="error" data-pw-error="You must enter a password!" data-username-error="You must enter a User Name!"></span>
</div> <!-- End Error box -->

Answer 1

有两种方式登录到一个网站：HTTP授权和表单。大多数网站使用更晚的，更方便用户的登录形式。HTTP授权只在网站希望与用户程序交互时使用（不，这里不包括浏览器）。

在编写代码之前，您需要检查网站发送的表单数据，因为知道是成功的一半：

1. 访问学校网站并按cmd+Opt+c打开开发人员的控制台。
2. 单击网络选项卡。
3. 不要关闭此控制台。回到网站，像往常一样输入用户名和密码。

checkCookiesEnabled         true
checkMobileDevice           false
checkStandaloneMode         false
checkTabletDevice           false
portalAccountUsername       email
portalAccountPassword       password
portalAccountUsernameLabel

@IBAction func login(sender: AnyObject) {
    let url = NSURL(string: "https://hac.chicousd.org/LoginParent.aspx")!

    // The form parameters
    let parameters = [
        "checkCookiesEnabled": "true",
        "checkMobileDevice": "false",
        "checkStandaloneMode": "false",
        "checkTabletDevice": "false",
        "portalAccountUsername": "username",
        "portalAccountPassword": "password"
    ]

    let bodyString = parameters
                        .map { $0 + "=" + $1 }
                        .joinWithSeparator("&")
                        .stringByAddingPercentEncodingWithAllowedCharacters(.URLQueryAllowedCharacterSet())!


    let request = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "POST"
    request.HTTPBody = bodyString.dataUsingEncoding(NSUTF8StringEncoding)

    let task = NSURLSession.sharedSession().dataTaskWithRequest(request) { data, response, error in
        guard error == nil else {
            print(error?.localizedDescription)
            return
        }
        guard let data = data else {
            print("empty data")
            return
        }

        // This is the HTML source of the landing page after login
        let html = String(data: data, encoding: NSUTF8StringEncoding)
    }
    task.resume()
}