62 lines
2.0 KiB
C#
62 lines
2.0 KiB
C#
using FastGithub.Scanner;
|
|
using Microsoft.Extensions.Logging;
|
|
using System;
|
|
using System.Net.Http;
|
|
using System.Threading;
|
|
using System.Threading.Tasks;
|
|
|
|
namespace FastGithub.ReverseProxy
|
|
{
|
|
/// <summary>
|
|
/// Github的dns解析的httpHandler
|
|
/// 使扫描索结果作为github的https请求的域名解析
|
|
/// </summary>
|
|
sealed class GithubDnsHttpHandler : DelegatingHandler
|
|
{
|
|
private readonly IGithubScanResults scanResults;
|
|
private readonly ILogger logger;
|
|
|
|
/// <summary>
|
|
/// Github的dns解析的httpHandler
|
|
/// </summary>
|
|
/// <param name="scanResults"></param>
|
|
/// <param name="innerHandler"></param>
|
|
public GithubDnsHttpHandler(
|
|
IGithubScanResults scanResults,
|
|
HttpMessageHandler innerHandler,
|
|
ILogger logger)
|
|
: base(innerHandler)
|
|
{
|
|
this.scanResults = scanResults;
|
|
this.logger = logger;
|
|
}
|
|
|
|
/// <summary>
|
|
/// 发送消息
|
|
/// </summary>
|
|
/// <param name="request"></param>
|
|
/// <param name="cancellationToken"></param>
|
|
/// <returns></returns>
|
|
protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
|
|
{
|
|
var uri = request.RequestUri;
|
|
if (uri != null && uri.HostNameType == UriHostNameType.Dns)
|
|
{
|
|
var address = this.scanResults.FindBestAddress(uri.Host);
|
|
if (address != null)
|
|
{
|
|
this.logger.LogInformation($"使用{address}请求{uri.Host}");
|
|
var builder = new UriBuilder(uri)
|
|
{
|
|
Host = address.ToString()
|
|
};
|
|
request.RequestUri = builder.Uri;
|
|
request.Headers.Host = uri.Host;
|
|
}
|
|
}
|
|
|
|
return await base.SendAsync(request, cancellationToken);
|
|
}
|
|
}
|
|
}
|