c# - 调用 HTTPClient.PostAsync 时设置授权/内容类型 header

Question

当使用简单的 HTTPClient 时，我在哪里可以设置 REST 服务调用的 header ？

我愿意:

HttpClient client = new HttpClient();
var values = new Dictionary<string, string>
{
    {"id", "111"},
    {"amount", "22"}
};
var content = new FormUrlEncodedContent(values);
var uri = new Uri(@"https://some.ns.restlet.uri");

var response = await client.PostAsync(uri, content);
var responseString = await response.Content.ReadAsStringAsync();

更新

我要添加的标题:

{
    "Authorization": "NLAuth nlauth_account=5731597_SB1, nlauth_email=xxx@xx.com, nlauth_signature=Pswd1234567, nlauth_role=3",
    "Content-Type": "application/json"
}

我应该执行以下操作吗？

client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Authorization", "NLAuth nlauth_account=5731597_SB1, nlauth_email=xxx@xx.com, nlauth_signature=Pswd1234567, nlauth_role=3","Content-Type":"application/json");

Answer 1

添加header的方法如下:

HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "Your Oauth token");

或者如果你想要一些自定义标题:

HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Add("HEADERNAME", "HEADERVALUE");

这个答案已经有 SO 回复，见下文:

• Adding headers when using httpClient.GetAsync
• Setting Authorization Header of HttpClient

更新

似乎您要添加两个 header ；授权和内容类型。

string authValue = "NLAuth nlauth_account=5731597_SB1,nlauth_email=xxx@xx.com, nlauth_signature=Pswd1234567, nlauth_role=3";
string contentTypeValue = "application/json";

client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(authValue);
client.DefaultRequestHeaders.Add("Content-Type", contentTypeValue);