如何将基本身份验证与System.Net.Http.HttpClient一起使用? [英] How do you use Basic Authentication with System.Net.Http.HttpClient?
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问题描述
我正在尝试在c#.net核心中实现一个REST客户端,该客户端首先需要进行基本身份验证,然后在后续请求中利用Bearer令牌.
I'm trying to implement a rest client in c# .net core that needs to first do Basic Authentication, then leverage a Bearer token in subsequent requests.
当我尝试结合使用带有FormUrlEncodedContent对象的client.PostAsync进行基本身份验证时,出现了异常:
When I try to do Basic Authentication in combination with client.PostAsync with a FormUrlEncodedContent object, I'm getting an exception:
System.InvalidOperationException occurred in System.Net.Http.dll: 'Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects.'
//setup reusable http client
HttpClient client = new HttpClient();
Uri baseUri = new Uri(url);
client.BaseAddress = baseUri;
client.DefaultRequestHeaders.Clear();
client.DefaultRequestHeaders.ConnectionClose = true;
//Post body content
var values = new List<KeyValuePair<string,string>>();
values.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));
var content = new FormUrlEncodedContent(values);
//Basic Authentication
var authenticationString = $"{clientId}:{clientSecret}";
var base64EncodedAuthenticationString = Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(authenticationString));
content.Headers.Add("Authorization", $"Basic {base64EncodedAuthenticationString}");
//make the request
var task = client.PostAsync("/oauth2/token",content);
var response = task.Result;
response.EnsureSuccessStatusCode();
string responseBody = response.Content.ReadAsStringAsync().Result;
Console.WriteLine(responseBody);
Exception has occurred: CLR/System.InvalidOperationException
An unhandled exception of type 'System.InvalidOperationException' occurred in System.Net.Http.dll: 'Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects.'
at System.Net.Http.Headers.HttpHeaders.GetHeaderDescriptor(String name)
at System.Net.Http.Headers.HttpHeaders.Add(String name, String value)
推荐答案
您似乎无法使用PostAsync,并且可以使用Headers进行身份验证.我必须使用HttpRequestMessage和SendAsync.
It looks like you can't use PostAsync and have access to mess with the Headers for authentication. I had to use an HttpRequestMessage and SendAsync.
//setup reusable http client
HttpClient client = new HttpClient();
Uri baseUri = new Uri(url);
client.BaseAddress = baseUri;
client.DefaultRequestHeaders.Clear();
client.DefaultRequestHeaders.ConnectionClose = true;
//Post body content
var values = new List<KeyValuePair<string, string>>();
values.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));
var content = new FormUrlEncodedContent(values);
var authenticationString = $"{clientId}:{clientSecret}";
var base64EncodedAuthenticationString = Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes(authenticationString));
var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/oauth2/token");
requestMessage.Headers.Authorization = new AuthenticationHeaderValue("Basic", base64EncodedAuthenticationString);
requestMessage.Content = content;
//make the request
var task = client.SendAsync(requestMessage);
var response = task.Result;
response.EnsureSuccessStatusCode();
string responseBody = response.Content.ReadAsStringAsync().Result;
Console.WriteLine(responseBody);
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