如何使用System.Net.Http.HttpClient获取响应cookie？

Question

这个问题之前已被问过几次,但我找不到明确的答案.甚至可以使用System.Net.Http.HttpClient获取响应cookie吗？

Answer 1

下面是我用于访问服务器生成的cookie的一些示例代码.我刚试过它,它对我有用.我改变了凭证.如果你想看到它的工作,你需要创建一个nerddinner帐户.

    [Fact]
    public async Task Accessing_resource_secured_by_cookie()
    {
        var handler = new HttpClientHandler();
        var httpClient = new HttpClient(handler);

        Assert.Equal(0, handler.CookieContainer.Count);

        // Create a login form
        var body = new Dictionary<string, string>() 
        {
            {"UserName",  "<username>"},
            {"Password", "<password>"},
            {"RememberMe", "false"}
        };
        var content = new FormUrlEncodedContent(body);

        // POST to login form
        var response = await httpClient.PostAsync("http://www.nerddinner.com/Account/LogOn?returnUrl=%2F", content);

        // Check the cookies created by server
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        Assert.Equal(1, handler.CookieContainer.Count);
        var cookies = handler.CookieContainer.GetCookies(new Uri("http://www.nerddinner.com"));
        Assert.Equal(".ASPXAUTH", cookies[0].Name);

        // Make new request to secured resource
        var myresponse = await httpClient.GetAsync("http://www.nerddinner.com/Dinners/My");

        var stringContent = await myresponse.Content.ReadAsStringAsync();
        Assert.Equal(HttpStatusCode.OK, myresponse.StatusCode);
    }

从代码中可以看出,您无法直接从HTTP响应消息中获取响应cookie.我怀疑HttpClientHandler在返回之前剥离了响应的标头.但是,响应中的cookie放在CookieContainer中,您可以从那里访问它们.