c#带代理的HttpClient

Question

我用 HttpClient 对一些资源执行了很多请求.
为了避免舔，我将它用作单个实例。类似的东西...
我想使用代理，那么如何为每个请求使用不同的代理？

谢谢!

public class Program
{
    private static HttpClient Client = new HttpClient();
    public static void Main(string[] args)
    {
        Console.WriteLine("Starting connections");
        for(int i = 0; i<10; i++)
        {
            var result = Client.GetAsync("http://aspnetmonsters.com").Result;
            Console.WriteLine(result.StatusCode);
        }
        Console.WriteLine("Connections done");
        Console.ReadLine();
    }

}

Answer 1

您将需要实现 IWebProxy。

这是一个非常排的示例。

首先实现 IWebProxy

public class MyProxy : IWebProxy {
public MyProxy() {  credentials = new NetworkCredential( user, password ); }
private NetworkCredential credentials;
public ICredentials Credentials
{
    get = > credentials;
    set = > throw new NotImplementedException();
}
private Uri proxyUri;
public Uri GetProxy( Uri destination )
{
    return proxyUri; // your proxy Uri
}
public bool IsBypassed( Uri host )
{
    return false;
}
private const string user = "yourusername";
private const string password = "password";}

然后将其提供给 HttpClient 中的处理程序

public class MyHttpClient {
internal static HttpResult httpMethod( ... )
{
    var _client = client();
    try
    {
        var message = new HttpRequestMessage( method, url );
        message.Content = new StringContent( content, Encoding.UTF8, "application/json" );
        var result = _client.SendAsync( message ).Result;// handle result
    }
    catch( Exception e ){}
}
private static HttpClient client()
{
    var httpClientHandler = new HttpClientHandler() { Proxy = new MyProxy() };
    var httpClient = new MyClient( new Uri( "baseurl" ), httpClientHandler );
    return httpClient;