自定义标头到Httpclient请求

Question

如何为HttpClient请求添加自定义标头？我使用PostAsJsonAsync方法发布JSON。我需要添加的自定义标题是

"X-Version: 1"

这是我到目前为止所做的：

using (var client = new HttpClient()) {
    client.BaseAddress = new Uri("https://api.clickatell.com/");
    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "xxxxxxxxxxxxxxxxxxxx");
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    var response = client.PostAsJsonAsync("rest/message", svm).Result;
}

Answer 1

var request = new HttpRequestMessage {
    RequestUri = new Uri(EnvironmentSetup.BaseAddress + "Folder"),
    Method = HttpMethod.Post,
    Headers = {
        { "X-Version", "1" },
        { HttpRequestHeader.Authorization.ToString(), "Basic " + EnvironmentSetup.GetAuthToken() },
        { HttpRequestHeader.ContentType.ToString(), "multipart/mixed" },
    },
    Content = new MultipartContent {
        new ObjectContent<FolderWithDocuments>(new FolderWithDocuments {
            Status = FolderStatus.Draft,
            Users = new List<User> { EnvironmentSetup.User1, EnvironmentSetup.User2 },
        }, new JsonMediaTypeFormatter(), "application/json"),
        new ByteArrayContent(ResourceHelper.ReadResourceToByteArray("blank.pdf")) {
            Headers = {
                { "Content-Type", "application/Executable" },
                { "Content-Disposition", "form-data; filename=\"test.pdf\"" },
            },
        },
    },
};

Answer 2

我找到了问题的答案。

client.DefaultRequestHeaders.Add("X-Version","1");

这应该为您的请求添加自定义标头

Answer 3

以下是基于Anubis的答案（这是一种更好的方法，因为它不会修改每个请求的标头），但这更像是原始问题中的代码：

using Newtonsoft.Json;
...

    var client = new HttpClient();
    var httpRequestMessage = new HttpRequestMessage
        {
            Method = HttpMethod.Post,
            RequestUri = new Uri("https://api.clickatell.com/rest/message"),
            Headers = { 
                { HttpRequestHeader.Authorization.ToString(), "Bearer xxxxxxxxxxxxxxxxxxxx" },
                { HttpRequestHeader.Access.ToString(), "application/json" },
                { "X-Version", "1" }
            },
            Content = new StringContent(JsonConvert.SerializeObject(svm))
        };

    var response = client.SendAsync(httpRequestMessage).Result;

Answer 4

在Headers班有一个HttpRequestMessage财产。您可以在那里添加自定义标头，这些标头将随每个HTTP请求一起发送。另一方面，DefaultRequestHeaders类中的HttpClient设置了与使用该客户端对象发送的每个请求一起发送的头，因此名称为Default Request Headers。

希望这会让事情变得更加清晰，至少对于将来会看到这个答案的人来说。