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HttpClient.cs
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using FastGithub.Configuration;
using FastGithub.DomainResolve;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading;
using System.Threading.Tasks;
namespace FastGithub.Http
{
/// <summary>
/// 表示http客户端
/// </summary>
public class HttpClient : HttpMessageInvoker
{
/// <summary>
/// 插入的UserAgent标记
/// </summary>
private readonly static ProductInfoHeaderValue userAgent = new(new ProductHeaderValue(nameof(FastGithub), "1.0"));
/// <summary>
/// http客户端
/// </summary>
/// <param name="domainConfig"></param>
/// <param name="domainResolver"></param>
public HttpClient(DomainConfig domainConfig, IDomainResolver domainResolver)
: this(new HttpClientHandler(domainConfig, domainResolver), disposeHandler: true)
{
}
/// <summary>
/// http客户端
/// </summary>
/// <param name="handler"></param>
/// <param name="disposeHandler"></param>
public HttpClient(HttpMessageHandler handler, bool disposeHandler)
: base(handler, disposeHandler)
{
}
/// <summary>
/// 发送请求
/// </summary>
/// <param name="request"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
if (request.Headers.UserAgent.Contains(userAgent))
{
throw new FastGithubException($"由于{request.RequestUri}实际指向了{nameof(FastGithub)}自身，{nameof(FastGithub)}已中断本次转发");
}
request.Headers.UserAgent.Add(userAgent);
var response = await base.SendAsync(request, cancellationToken);
response.Headers.Server.TryParseAdd(nameof(FastGithub));
return response;
}
}
}