无法使用HttpClient获取接口资源
无法使用HttpClient获取接口资源
提问于 2018-06-18 01:18:55
Web API方法：
[HttpGet]
[Authorize(Roles = "Badmin")]
[Route("GetUsers")]
public IActionResult GetUsers()
{
List<ApplicationUser> users = _context.ApplicationUsers
.AsNoTracking().ToListAsync().Result;
return Json(users);
}在我的控制台程序代码中：
if (response != null)
{
using (HttpClient client = new HttpClient())
{
Console.WriteLine("AccessToken:" + Environment.NewLine + response.AccessToken);
Console.WriteLine(Environment.NewLine);
HttpResponseMessage resourceOwnerPasswordResponse = await client.GetAsync("https://localhost:44366/identity/GetUsers");
client.DefaultRequestHeaders.Add("Bearer", response.AccessToken);
if (!resourceOwnerPasswordResponse.IsSuccessStatusCode)
{
Console.WriteLine(resourceOwnerPasswordResponse.StatusCode);
Console.WriteLine("HttpClient ResourceOwnerPassword Result: " + resourceOwnerPasswordResponse.StatusCode);
Console.WriteLine(Environment.NewLine);
}
else
{
string result = await resourceOwnerPasswordResponse.Content.ReadAsStringAsync();
Console.WriteLine("HttpClient ResourceOwnerPassword Result: " + Environment.NewLine + JsonConvert.DeserializeObject(result));
Console.WriteLine(Environment.NewLine);
}
}
}第二种方式：
if (response != null)
{
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("https://localhost:44366/identity/GetUsers");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Headers.Add("Authorization", string.Format("Bearer {0}", response.AccessToken));
httpWebRequest.Method = "GET";
HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
string result = string.Empty;
using (Stream responseStream = httpWebResponse.GetResponseStream())
{
if (responseStream != null)
{
StreamReader streamReader = new StreamReader(responseStream);
result = streamReader.ReadToEnd();
streamReader.Close();
}
}
Console.WriteLine("HttpWebRequest ResourceOwnerPassword Result: " + Environment.NewLine + JsonConvert.DeserializeObject(result));
}查看控制台结果：
所以我的问题是，为什么当我使用HttpCliet时，我得到了未经授权的(代码401)，而第二种方法成功地获得了用户数据。
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-06-18 01:26:16
Token应该在发出请求之前添加到客户端，并且您需要确保它是Authorization头部。
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("Bearer", response.AccessToken);
//OR
//client.DefaultRequestHeaders
// .Add("Authorization", string.Format("Bearer {0}", response.AccessToken));
var resourceOwnerPasswordResponse = await client.GetAsync("https://localhost:44366/identity/GetUsers");这就是为什么它在第二个例子中工作，而不是在第一个例子中。
如果使用ToListAsync，则Web API操作也应该是异步
[HttpGet]
[Authorize(Roles = "Badmin")]
[Route("GetUsers")]
public async Task<IActionResult> GetUsers() {
var users = await _context.ApplicationUsers.AsNoTracking().ToListAsync();
return Json(users);
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50898856
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