c# - 从 httpwebrequest 切换到 httpclient，我不知道如何发送我的 header ？

Question

所以，这是我使用的代码

    string URL = "http://www.test.com/posts/.json";
    var getInfo = (HttpWebRequest)HttpWebRequest.Create(URL);{
    getInfo.Headers["Cookie"] = CookieHeader;
    getInfo.ContentType = "application/x-www-form-urlencoded";
    using (WebResponse postStream = await getInfo.GetResponseAsync())
    {
        StreamReader reader = new StreamReader(postStream.GetResponseStream());
        string str = reader.ReadToEnd();
    }

我想切换到 httpclient，我已经开始工作了，只是它不传递 Cookie 信息。我得到了信息，但只是匿名信息。不是我发送给用户的信息。这是我目前拥有的。

    HttpClient client = new HttpClient();
    client.DefaultRequestHeaders.Accept.Add(
    new MediaTypeWithQualityHeaderValue("application/json"));
    client.BaseAddress = new Uri("http://www.test.com/");
    client.DefaultRequestHeaders.Add("Cookie", CookieHeader);
    HttpResponseMessage response = await client.GetAsync("http://www.test.com" + URL);
    string str;
    str = await response.Content.ReadAsStringAsync();

Answer 1

您需要使用 HttpClientHandler，将 cookie 添加到其中，然后将其传递给 HttpClient 的构造函数。

一个例子:

    Uri baseUri = new Uri("http://www.test.com/");
    HttpClientHandler clientHandler = new HttpClientHandler();
    clientHandler.CookieContainer.Add(baseUri, new Cookie("name", "value"));
    HttpClient client = new HttpClient(clientHandler);
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    client.BaseAddress = baseUri;
    HttpResponseMessage response = await client.GetAsync("http://www.test.com" + URL);
    string str2 = await response.Content.ReadAsStringAsync();

我找到了对相同行为的引用 here ，声明 DefaultRequestHeaders 中名为“Cookie”的 header 被忽略且未发送，但似乎任何其他值都将按预期工作。