【发布时间】:2016-08-22 07:42:46
【问题描述】:
我正在编写 Xamarin 跨平台移动应用程序。该服务器是一个 SpringMVC 服务器,它使用 JWT 令牌对每个端点/Web 服务进行身份验证。所以基本上当我第一次向网络服务发出请求时,在我需要点击/authorize POST 端点发送我的电子邮件和密码之前,端点响应将在"Cookie" 标头中包含一个身份验证令牌,它是"AUTH_TOKEN={MD5-String}"。获得令牌后,我将请求发送到端点,比如说/feed。但我的问题是我无法弄清楚在 C#HttpClient 中设置“Cookie”标头的方法。我尝试了所有方法,但 endpoing 只是继续使用登录屏幕 html 响应,而不是实际的 JSON 响应。我在 Postman 和其他 REST 客户端中尝试了相同的步骤,并且成功了。所以这意味着我做错了什么。这是我的代码:
public class RestService : IRestService
{
HttpClient client;
HttpClientHandler handler;
CookieContainer cookies;
string authToken;
public List<Feed> FeedItems { get; private set; }
public RestService()
{
cookies = new CookieContainer();
handler = new HttpClientHandler();
handler.UseCookies = true; //Otherwise It'll not use the cookies container!!
handler.CookieContainer = cookies;
client = new HttpClient(handler);
client.MaxResponseContentBufferSize = 256000;
}
public async Task<List<Role>> GetFeedDataAsync()
{
//Request credentials
//Credentials validation
var credentials = new HalliganCredential()
{
email = Constants.Username,
password = Constants.Password
};
var jsonCredentials = JsonConvert.SerializeObject(credentials);
var jsonCredentialsContent = new StringContent(jsonCredentials, Encoding.UTF8, "application/json");
var authorizeUri = new Uri(Constants.AuthorizeEndpoint);
var authorizeResponse = await client.PostAsync(authorizeUri, jsonCredentialsContent);
if (authorizeResponse.IsSuccessStatusCode)
{
//If authentication went OK
IEnumerable<Cookie> responseCookies = cookies.GetCookies(authorizeUri).Cast<Cookie>();
foreach (Cookie cookie in responseCookies)
{
if (cookie.Name.Equals("AUTH-TOKEN"))
{
authToken = cookie.Value;
}
}
}
else
{
//Authentication failed throw error
throw new HttpRequestException("Authentication failed");
}
FeedItems = new List<Feed>();
//Making the GET request
var uri = new Uri(string.Format(Constants.FeedEnpoint, string.Empty));
try
{
cookies.Add(uri, new Cookie("Cookie", string.Format("AUTH_TOKEN={0}", authToken)));
client.DefaultRequestHeaders.Add("Cookie", string.Format("AUTH_TOKEN={0}", authToken));
handler.CookieContainer.Add(uri, new Cookie("Cookie", string.Format("AUTH_TOKEN={0}", authToken)));
var response = await client.GetAsync(uri);
response.EnsureSuccessStatusCode();
//Credentials validation
if (response.IsSuccessStatusCode)
{
var content = await response.Content.ReadAsStringAsync();
FeedItems = JsonConvert.DeserializeObject<List<Feed>>(content);
}
}
catch (Exception ex)
{
Debug.WriteLine(@"ERROR {0}", ex.Message);
}
return FeedItems;
}
}
当我到达var content = await response.Content.ReadAsStringAsync(); 行时,响应是一个 HTML 字符串,而不是实际的 JSON 响应。
尽管"Cookie" 是在 Postman 上工作的,但我尝试使用其他几个键值作为标题。
我尝试使用"Set-Cookie"、"set-cookie"、"Set-Cookie",将标题设置为"AUTH_TOKEN"。我在不同的地方尝试了所有这些建议,例如将它们添加到 cookie CookieContainer、handler CookieContainer 和 client.DefaultRequestHeaders 中。
我尝试打开和关闭handler.UseCookies = true; //Otherwise It'll not use the cookies container!! 线。
欢迎任何帮助!
更新
我尝试了建议的解决方案之一,但没有成功我尝试了 UseCookies 的真假。
//Making the GET request
var baseAddress = new Uri("http://app.******.io");
using (var handler = new HttpClientHandler { UseCookies = true })
using (var client = new HttpClient(handler) { BaseAddress = baseAddress })
{
var message = new HttpRequestMessage(HttpMethod.Get, "/api/v1/feed?api_key=sarasa");
message.Headers.Add("Cookie", string.Format("AUTH_TOKEN={0}", authToken));
message.Headers.Add("Cookie", string.Format("AUTH_TOKEN={0};", authToken));
message.Headers.Add("Set-Cookie", string.Format("AUTH_TOKEN={0}", authToken));
message.Headers.Add("AUTH_TOKEN", authToken);
var result = await client.SendAsync(message);
result.EnsureSuccessStatusCode();
if (result.IsSuccessStatusCode)
{
var content = await result.Content.ReadAsStringAsync();
FeedItems= JsonConvert.DeserializeObject<List<Feed>>(content);
}
}
return FeedItems;
更新
我尝试了另一种解决方案,结果相同。
var baseAddress = new Uri("http://app.*****.io");
var cookieContainer = new CookieContainer();
using (var handler = new HttpClientHandler() { CookieContainer = cookieContainer })
using (var client = new HttpClient(handler) { BaseAddress = baseAddress })
{
cookieContainer.Add(baseAddress, new Cookie("Cookie", string.Format("AUTH_TOKEN={0}", authToken)));
cookieContainer.Add(baseAddress, new Cookie("Set-Cookie", string.Format("AUTH_TOKEN={0}", authToken)));
var result = client.GetAsync("/api/v1/roles?api_key=sarasa").Result;
result.EnsureSuccessStatusCode();
if (result.IsSuccessStatusCode)
{
var content = await result.Content.ReadAsStringAsync();
RolesItems = JsonConvert.DeserializeObject<List<Role>>(content);
}
}
HttpClient 有替代品吗?
【问题讨论】:
-
@SushiHangover 查看我更新的问题。我尝试了该解决方案但没有用,我将尝试使用其他解决方案,看看它是否有效......
-
仅供参考:在该示例中,您实际上在
HttpClientHandler中设置了UseCookies = false,然后手动将它们添加到标题中(就像您正在做的那样) -
是的,但我说我尝试了这两个值...
标签: c# cookies xamarin jwt dotnet-httpclient