C# 如何"；刷新“；随HttpClient返回的cookie

我在一个Xamarin.Forms项目中工作，在该项目中，我使用cookies调用一些Web服务，因为它们最初是为网站制作的。有些Web服务只返回cookies，但Oher需要接收cookies才能正常工作

例如，登录Web服务获取一个JSON并返回两个cookie，而注销Web服务获取一个“空”JSON，即之前的两个cookie，并且必须为其中一个cookie返回一个更新值

我基于以下链接使用HttpClient管理cookie：

我的问题是我可以向Web服务发送cookie，我可以通过Web服务接收返回的cookie，但是如果我在调用之前发送了cookie，我就无法接收任何“更新的”cookie

调用登录Web服务的代码如下所示：

public async Task Login()
{
    Uri uri = new Uri("http://www.website.com/Login");

    CookieContainer cookies = new CookieContainer();
    HttpClientHandler handler = new HttpClientHandler();
    handler.CookieContainer = cookies;

    var httpClient = new HttpClient(handler);

    var jsonParam = "{\"data\":{\"device\":\"xxx\",\"login\":\"my@email.com\",\"password\":\"password\"}}";

    HttpContent httpContent = new StringContent(jsonParam);
    httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

    httpClient.DefaultRequestHeaders.Add("X-HTTP-Method-Override", "PUT");
    httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    try
    {
        HttpResponseMessage httpResponse = httpClient.PostAsync(uri), httpContent).Result;
        //Treatment of the recovered cookies
        IEnumerable<Cookie> responseCookies = cookies.GetCookies(uri).Cast<Cookie>();
        foreach (Cookie cookie in responseCookies)
        {
            Debug.WriteLine(cookie.Name + " : " + cookie.Value);
            wsCookies.Add(new KeyValuePair<string, string>(cookie.Name, cookie.Value));
        }

        if (httpResponse.IsSuccessStatusCode)
        {
            var responseText = await httpResponse.Content.ReadAsStringAsync();
        }
    }
    catch (Exception e)
    {

    }
}

public async Task Logout(String test)
{
    Uri uri = new Uri("http://www.website.com/Logout");

    CookieContainer cookies = new CookieContainer();
    HttpClientHandler handler = new HttpClientHandler();
    handler.CookieContainer = cookies;

    var httpClient = new HttpClient(handler);

    var jsonParam = "{\"data\":{}}";

    HttpContent httpContent = new StringContent(jsonParam);
    httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

    httpClient.DefaultRequestHeaders.Add("X-HTTP-Method-Override", "GET");
    httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    //Retrieving cookies to send
    foreach (KeyValuePair<string, string> kvpCookie in wsCookies)
    {
        cookies.Add(uri, new Cookie(kvpCookie.Key, kvpCookie.Value));
    }

    try
    {
        HttpResponseMessage httpResponse = httpClient.PostAsync(uri, httpContent).Result;
        //Treatment of the recovered cookies
        IEnumerable<Cookie> responseCookies = cookies.GetCookies(uri).Cast<Cookie>();
        foreach (Cookie cookie in responseCookies)
        {
            Debug.WriteLine(cookie.Name + " : " + cookie.Value);
            wsCookies.Add(new KeyValuePair<string, string>(cookie.Name, cookie.Value));
        }

        if (httpResponse.IsSuccessStatusCode)
        {
            var responseText = await httpResponse.Content.ReadAsStringAsync();
        }
    }
    catch (Exception e)
    {

    }
}

公共异步任务登录（）
{
Uri=新的Uri（“http://www.website.com/Login");
CookieContainer cookies=新CookieContainer（）；
HttpClientHandler handler=新的HttpClientHandler（）；
handler.CookieContainer=cookies；
var httpClient=新的httpClient（处理程序）；
var jsonParam=“{\”数据\“：{\”设备\“：\”xxx\“，\”登录\“：\”my@email.com\“，\”密码\“：\”密码\“}}”；
HttpContent HttpContent=新的StringContent（jsonParam）；
httpContent.Headers.ContentType=新的MediaTypeHeaderValue（“应用程序/json”）；
httpClient.DefaultRequestHeaders.Add（“X-HTTP-Method-Override”、“PUT”）；
httpClient.DefaultRequestHeaders.Accept.Add（新的MediaTypeWithQualityHeaderValue（“应用程序/json”）；
尝试
{
HttpResponseMessageHttpResponse=httpClient.PostAsync（uri），httpContent）.Result；
//回收饼干的处理
IEnumerable responseCookies=cookies.GetCookies（uri.Cast（）；
foreach（响应Cookie Cookie）
{
Debug.WriteLine（cookie.Name+“：”+cookie.Value）；
添加（新的KeyValuePair（cookie.Name，cookie.Value））；
}
if（httpResponse.IsSuccessStatusCode）
{
var responseText=wait-httpResponse.Content.ReadAsStringAsync（）；
}
}
捕获（例外e）
{
}
}

=>效果很好：我得到了预期的cookies:SESSIONID=xxx和USERID=xxx

我的注销方法的代码如下所示：

public async Task Login()
{
    Uri uri = new Uri("http://www.website.com/Login");

    CookieContainer cookies = new CookieContainer();
    HttpClientHandler handler = new HttpClientHandler();
    handler.CookieContainer = cookies;

    var httpClient = new HttpClient(handler);

    var jsonParam = "{\"data\":{\"device\":\"xxx\",\"login\":\"my@email.com\",\"password\":\"password\"}}";

    HttpContent httpContent = new StringContent(jsonParam);
    httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

    httpClient.DefaultRequestHeaders.Add("X-HTTP-Method-Override", "PUT");
    httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    try
    {
        HttpResponseMessage httpResponse = httpClient.PostAsync(uri), httpContent).Result;
        //Treatment of the recovered cookies
        IEnumerable<Cookie> responseCookies = cookies.GetCookies(uri).Cast<Cookie>();
        foreach (Cookie cookie in responseCookies)
        {
            Debug.WriteLine(cookie.Name + " : " + cookie.Value);
            wsCookies.Add(new KeyValuePair<string, string>(cookie.Name, cookie.Value));
        }

        if (httpResponse.IsSuccessStatusCode)
        {
            var responseText = await httpResponse.Content.ReadAsStringAsync();
        }
    }
    catch (Exception e)
    {

    }
}

public async Task Logout(String test)
{
    Uri uri = new Uri("http://www.website.com/Logout");

    CookieContainer cookies = new CookieContainer();
    HttpClientHandler handler = new HttpClientHandler();
    handler.CookieContainer = cookies;

    var httpClient = new HttpClient(handler);

    var jsonParam = "{\"data\":{}}";

    HttpContent httpContent = new StringContent(jsonParam);
    httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

    httpClient.DefaultRequestHeaders.Add("X-HTTP-Method-Override", "GET");
    httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    //Retrieving cookies to send
    foreach (KeyValuePair<string, string> kvpCookie in wsCookies)
    {
        cookies.Add(uri, new Cookie(kvpCookie.Key, kvpCookie.Value));
    }

    try
    {
        HttpResponseMessage httpResponse = httpClient.PostAsync(uri, httpContent).Result;
        //Treatment of the recovered cookies
        IEnumerable<Cookie> responseCookies = cookies.GetCookies(uri).Cast<Cookie>();
        foreach (Cookie cookie in responseCookies)
        {
            Debug.WriteLine(cookie.Name + " : " + cookie.Value);
            wsCookies.Add(new KeyValuePair<string, string>(cookie.Name, cookie.Value));
        }

        if (httpResponse.IsSuccessStatusCode)
        {
            var responseText = await httpResponse.Content.ReadAsStringAsync();
        }
    }
    catch (Exception e)
    {

    }
}

公共异步任务注销（字符串测试）
{
Uri=新的Uri（“http://www.website.com/Logout");
CookieContainer cookies=新CookieContainer（）；
HttpClientHandler handler=新的HttpClientHandler（）；
handler.CookieContainer=cookies；
var httpClient=新的httpClient（处理程序）；
var jsonParam=“{\”数据\“：{}”；
HttpContent HttpContent=新的StringContent（jsonParam）；
httpContent.Headers.ContentType=新的MediaTypeHeaderValue（“应用程序/json”）；
httpClient.DefaultRequestHeaders.Add（“X-HTTP-Method-Override”、“GET”）；
httpClient.DefaultRequestHeaders.Accept.Add（新的MediaTypeWithQualityHeaderValue（“应用程序/json”）；
//正在检索要发送的cookies
foreach（WSCookie中的KeyValuePair kvpCookie）
{
添加（uri，新Cookie（kvpCookie.Key，kvpCookie.Value））；
}
尝试
{
HttpResponseMessageHttpResponse=httpClient.PostAsync（uri，httpContent）.Result；
//回收饼干的处理
IEnumerable responseCookies=cookies.GetCookies（uri.Cast（）；
foreach（响应Cookie Cookie）
{
Debug.WriteLine（cookie.Name+“：”+cookie.Value）；
添加（新的KeyValuePair（cookie.Name，cookie.Value））；
}
if（httpResponse.IsSuccessStatusCode）
{
var responseText=wait-httpResponse.Content.ReadAsStringAsync（）；
}
}
捕获（例外e）
{
}
}

=>此方法有效，但我没有获得预期的cookie。我发送我之前收到的cookies（名称和值）（SESSIONID=xxx和USERID=xxx），但我没有为cookies获取新的值，而我等待USERID=deleted，就像我在Fiddler中嗅探它时看到的那样：我只找到了我在“响应书”中发送的两个cookies

---

=>你有什么解释吗？有什么我做错了吗？是否有其他方法来管理Web服务和cookie？

不确定这是否是问题所在，但为什么每次都要创建cookie容器？你每次都可以把饼干递给我

---

因此，初始化一次，然后将现有cookie容器分配给

Login

和

Logout

中的请求。您能提供有关建议的更多详细信息或链接吗？我对CookieContainer不是很熟悉，但在我找到的每个样本中，他们都使用了类似的东西。但这可能不是最好的方法。