使用 cookie 重定向的 WebRequest 不起作用（Windows Build 15063）

Question

我创建了一个 UWP 应用程序，该应用程序调用 Web 服务至极响应，并结合了 cookie 的重定向。

这适用于 Windows 10 版本 1803（内部版本 17134）
当切换到 Windows 10 创意者更新（内部版本 15063）以便在 Windows 10 移动版上运行时，它停止工作（在 PC 和移动版上）

使用fiddler可以看到重定向请求时cookie没有被使用。

public static async System.Threading.Tasks.Task<double> GetCreditAsync(string number, string pun, System.Threading.CancellationToken cancel = default(System.Threading.CancellationToken))
{
    var cookieContainer = new CookieContainer();

    var request = System.Net.WebRequest.Create("http://test.test") as HttpWebRequest;
    using (cancel.Register(() => request.Abort(), useSynchronizationContext: false))
    {
        request.Method = "POST";
        request.CookieContainer = cookieContainer;

        request.ContentType = "multipart/form-data; boundary=---------------------------7e23ca1f27119e";
        var data = "-----------------------------7e23ca1f27119e"
        + "\n" + "Content-Disposition: form-data; name=\"data1\""
        + "\n" + ""
        + "\n" + number
        + "\n" + "-----------------------------7e23ca1f27119e"
        + "\n" + "Content-Disposition: form-data; name=\"data2\""
        + "\n" + ""
        + "\n" + pun
        + "\n" + "-----------------------------7e23ca1f27119e--"
        + "\n" + "";
        var buffer = System.Text.Encoding.UTF8.GetBytes(data);
        using (var requeststream = await request.GetRequestStreamAsync())
            requeststream.Write(buffer, 0, buffer.Length);

        using (var response = (await request.GetResponseAsync()) as HttpWebResponse)
        {
            using (var responseStream = response.GetResponseStream())
            using (var stream = new StreamReader(responseStream))
            {
                var text = await stream.ReadToEndAsync();
                value = GetValue(text);
                return value;
            }
        }
    }
}

知道如何让它在 Windows Phone 上运行吗？

Answer 1

我发现 HttpClient 有一个使用HttpMessageHandler 的构造函数。虽然HttpRequest（还）没有禁用自动重定向的选项，但可以在HttpClientHandler 上设置。

var cookieContainer = new CookieContainer();
using (var client = new HttpClient(new HttpClientHandler()
{
    CookieContainer = cookieContainer,
    UseCookies = true,
    AllowAutoRedirect = false
}))
{
    var content = new MultipartFormDataContent
        {
            { new StringContent(number), "data1" },
            { new StringContent(pun), "data2" },
        };

    var result = await client.PostAsync(RequestUriString, content, cancel);
    result = await client.GetAsync(RequestUriString, cancel);


    var text = await result.Content.ReadAsStringAsync();
    // ...
 }

Answer 2

在新的 UWP 版本中似乎已解决问题，请参阅有关此问题的详细信息here 和Fix HttpClient redirection logic on UAP。

为了使 Cookie 在 Windows phone 或之前版本中正常工作，您可以尝试在 Windows.Web.Http 命名空间中使用 HttpCookieManager 类和 HttpCookie 类。

//To get/set cookies
using (var protocolFilter = new HttpBaseProtocolFilter())
{
    //get CookieManager instance
    var cookieManager = protocolFilter.CookieManager;
    //get cookies
    var cookies = cookieManager.GetCookies(uri);
    foreach (var cookie in cookies)
    {
        Debug.Write(cookie.Value);
    }
    //you can also SetCookie
    //cookieManager.SetCookie(MyCookie);
}

您可以使用 CookieUsageBehavior 属性定义 cookie 使用行为。

var protocolFilter = new HttpBaseProtocolFilter()
//Do not handle cookies automatically. you can set it as your requirements.
protocolFilter.CookieUsageBehavior = HttpCookieUsageBehavior.NoCookies;
// Create a HttpClient
var httpClient = new HttpClient(protocolFilter);