如何使用 HttpClient 以 Post 进行身份验证

Question

我正在尝试使用 HttpClient 在 C# 中执行以下 curl（对我有用）。

curl -X POST http://www.somehosturl.com \
     -u <client-id>:<client-secret> \
     -d 'grant_type=password' \
     -d 'username=<email>' \
     -d 'password=<password>' \
     -d 'scope=all

C#代码：

HttpClientHandler handler = new HttpClientHandler { Credentials = new  
            System.Net.NetworkCredential ("my_client_id", "my_client_secret")
    };


    try
    {
        using(var httpClient = new HttpClient(handler))
        {
            var activationUrl = "www.somehosturl.com";

            var postData = "grant_type=password&username=myemail@myemail.com&password=mypass&scope=all";
            var content = new StringContent(postData, Encoding.UTF8, "application/x-www-form-urlencoded");

            var response = await httpClient.PostAsync(activationUrl, content);
            if(!response.IsSuccessStatusCode)
                return null;

            var result = await response.Content.ReadAsStringAsync();

            return result;
        }
    }
    catch(Exception)
    {
        return null;
    }

执行的时候直接崩溃，连异常都没有捕捉到

通常我能够 GET 并且 POST 非常好，但让我失望的是如何设置身份验证内容（客户端 ID 和客户端密码）

Answer 1

尝试将您的凭据直接放入 HttpClient 的 headers 属性。

using (var client = new HttpClient()) {
       var byteArray = Encoding.ASCII.GetBytes("my_client_id:my_client_secret");
       var header = new AuthenticationHeaderValue("Basic",Convert.ToBase64String(byteArray));
       client.DefaultRequestHeaders.Authorization = header;

       return await client.GetStringAsync(uri);
}

Answer 2

首先，您必须使用 <clientid> 和 <clientsecret> 设置 Authorization-Header。

您应该使用 FormUrlEncodedContent 而不是 StringContent，如下所示：

var client = new HttpClient();
client.BaseAddress = new Uri("http://myserver");
var request = new HttpRequestMessage(HttpMethod.Post, "/path");

var byteArray = new UTF8Encoding().GetBytes("<clientid>:<clientsecret>");
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));

var formData = new List<KeyValuePair<string, string>>();
formData.Add(new KeyValuePair<string, string>("grant_type", "password"));
formData.Add(new KeyValuePair<string, string>("username", "<email>"));
formData.Add(new KeyValuePair<string, string>("password", "<password>"));
formData.Add(new KeyValuePair<string, string>("scope", "all"));

request.Content = new FormUrlEncodedContent(formData);
var response = await client.SendAsync(request);

Answer 3

见BasicAuthenticationHeaderValue

httpClient.DefaultRequestHeaders.Authorization
    = new BasicAuthenticationHeaderValue("login", "password");

或使用 IdentityModel 的扩展：

<PackageReference Include="IdentityModel" Version="4.0.0" />

var client = new HttpClient();
client.SetBasicAuthentication(login, password);
client.SetBearerToken(token);

如何使用 HttpClient 以 Post 进行身份验证

How to use HttpClient to Post with Authentication

.net

c#

httpclient