将Http Headers添加到HttpClient

Question

所有:

在向Web服务发送请求之前,我需要将http标头添加到HttpClient.我如何为单个请求执行此操作(而不是将HttpClient应用于所有将来的请求)？我不确定这是否可行.

var client = new HttpClient();
var task =
    client.GetAsync("http://www.someURI.com")
    .ContinueWith((taskwithmsg) =>
    {
        var response = taskwithmsg.Result;

        var jsonTask = response.Content.ReadAsAsync<JsonObject>();
        jsonTask.Wait();
        var jsonObject = jsonTask.Result;
    });
task.Wait();

Answer 1

创建一个HttpRequestMessage,将方法设置为GET,设置标题,然后使用SendAsync而不是GetAsync.

var client = new HttpClient();
var request = new HttpRequestMessage() {
    RequestUri = new Uri("http://www.someURI.com"),
    Method = HttpMethod.Get,
};
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/plain"));
var task = client.SendAsync(request)
    .ContinueWith((taskwithmsg) =>
    {
        var response = taskwithmsg.Result;

        var jsonTask = response.Content.ReadAsAsync<JsonObject>();
        jsonTask.Wait();
        var jsonObject = jsonTask.Result;
    });
task.Wait();

Answer 2

如果它可以是所有请求的相同标头，或者在每个请求之后都处置客户端，则可以使用以下DefaultRequestHeaders.Add选项：

client.DefaultRequestHeaders.Add("apikey","xxxxxxxxx");