[英]How to read cookies from HttpResponseMessage?
這是我最近的代碼:
HttpClient authClient = new HttpClient();
authClient.BaseAddress = new Uri("http://localhost:4999/test_db/_session");
authClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var user = new LoginUserSecretModel
{
name = userKey,
password = loginData.Password,
};
HttpResponseMessage authenticationResponse = authClient.PostAsJsonAsync("", user).Result;
我在這里的許多答案中遇到的問題是,使用CookieContainer
使用的是不推薦的短期HttpClient
對象。
相反,您可以簡單地從響應中讀取"Set-Cookie"
標頭:
// httpClient is long-lived and comes from a IHttpClientFactory
HttpResponseMessage response = await httpClient.GetAsync(uri);
IEnumerable<string> cookies = response.Headers.SingleOrDefault(header => header.Key == "Set-Cookie")?.Value;
嘗試這個:
CookieContainer cookies = new CookieContainer();
HttpClientHandler handler = new HttpClientHandler();
handler.CookieContainer = cookies;
HttpClient authClient = new HttpClient(handler);
var uri = new Uri("http://localhost:4999/test_db/_session");
authClient.BaseAddress = uri;
authClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var user = new LoginUserSecretModel
{
name = userKey,
password = loginData.Password,
};
HttpResponseMessage authenticationResponse = authClient.PostAsJsonAsync("", user).Result;
var responseCookies = cookies.GetCookies(uri).Cast<Cookie>();
這是獲取 cookie 列表所需要的;
private async Task<List<Cookie>> GetCookies(string url, string cookieName)
{
var cookieContainer = new CookieContainer();
var uri = new Uri(url);
using (var httpClientHandler = new HttpClientHandler
{
CookieContainer = cookieContainer
})
{
using (var httpClient = new HttpClient(httpClientHandler))
{
await httpClient.GetAsync(uri);
List<Cookie> cookies = cookieContainer.GetCookies(uri).Cast<Cookie>().ToList();
return cookies;
}
}
}
如果您只需要一個 cookie 值,方法如下
private async Task<string> GetCookieValue(string url)
{
var cookieContainer = new CookieContainer();
var uri = new Uri(url);
using (var httpClientHandler = new HttpClientHandler
{
CookieContainer = cookieContainer
})
{
using (var httpClient = new HttpClient(httpClientHandler))
{
await httpClient.GetAsync(uri);
var cookie = cookieContainer.GetCookies(uri).Cast<Cookie>().FirstOrDefault(x => x.Name == cookieName);
return cookie?.Value;
}
}
}
基於Daniel 的回答和對另一個問題的回答,這將是一種從 HTTP 響應中讀取 cookie 的簡單方法。
// httpClient is long-lived and comes from a IHttpClientFactory
HttpResponseMessage response = await httpClient.GetAsync(uri);
CookieContainer cookies = new CookieContainer();
foreach (var cookieHeader in response.Headers.GetValues("Set-Cookie"))
cookies.SetCookies(uri, cookieHeader);
string cookieValue = cookies.GetCookies(uri).FirstOrDefault(c => c.Name == "MyCookie")?.Value;
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