/// <summary>
/// 初始化异步请求对象
/// </summary>
/// <param name="request"> </param>
/// <param name="callback"> </param>
/// <param name="state"> </param>
public HttpClientBeginResult(IHttpRequest request, AsyncCallback callback, object state)
{
_asyncCallback = callback;
_timer = HttpRequestTimer.OnStart();
_request = request;
request.OnInitialize();
_requestData = new HttpRequestData(request);
_webRequest = Convert(_requestData);
_timer.OnReady();
request.OnSending();
_asyncResult = _webRequest.BeginGetResponse(OnCallback, state);
}
/// <summary>
/// 同步发送 HTTP 请求
/// </summary>
/// <param name="request"> 请求对象 </param>
/// <returns> </returns>
public IHttpResponse Send(IHttpRequest request)
{
var timer = HttpRequestTimer.OnStart();
var data = default(HttpRequestData);
try
{
request.OnInitialize();
data = new HttpRequestData(request);
request.Logger?.Write(TraceEventType.Verbose, () => data.Raw);
var www = Convert(data);
timer.OnReady();
request.OnSending();
var response = (HttpWebResponse)www.GetResponse();
timer.OnSend();
request.Response = Convert(response, request.CookieMode != HttpCookieMode.None);
request.OnEnd(request.Response);
}
catch (Exception ex)
{
timer.OnError();
request.Logger?.Write(TraceEventType.Error, "请求中出现错误", ex);
var wex = ex as WebException;
if (wex != null)
{
var res = Convert((HttpWebResponse)wex.Response, request.CookieMode != HttpCookieMode.None);
res.Exception = ex;
request.Response = res;
}
else
{
var res = new HttpResponse {
Exception = ex
};
request.Response = res;
}
request.OnError(request.Response);
}
finally
{
timer.OnEnd();
request.Logger?.Write(TraceEventType.Verbose, () => request.Response?.ResponseRaw);
request.Logger?.Write(TraceEventType.Information, timer.ToString());
}
((HttpResponse)request.Response).RequestData = data;
return(request.Response);
}
/// <summary>
/// 发送异步请求
/// </summary>
/// <param name="request"> 请求对象 </param>
/// <param name="cancellationToken"> 用于取消请求的通知对象 </param>
/// <returns> </returns>
public async Task <IHttpResponse> SendAsync(IHttpRequest request, CancellationToken cancellationToken)
{
var timer = HttpRequestTimer.OnStart();
var data = default(HttpRequestData);
try
{
request.OnInitialize();
data = new HttpRequestData(request);
var www = Convert(data);
request.Logger?.Write(TraceEventType.Verbose, () => data.Raw);
timer.OnReady();
request.OnSending();
using (var source1 = new CancellationTokenSource(data.Timeout.TotalMilliseconds >= int.MaxValue ? int.MaxValue : (int)data.Timeout.TotalMilliseconds))
using (var source2 = CancellationTokenSource.CreateLinkedTokenSource(source1.Token, cancellationToken))
using (var client = new HttpClientWrapper(request)) //为了解决动态代理的问题
{
var response = await client.SendAsync(www, source2.Token);
var cookies = data.Cookies;
while (request.AutoRedirect && response.StatusCode == HttpStatusCode.Redirect) //手动处理302的请求
{
request.Logger?.Write(TraceEventType.Verbose, () => request.Response?.ResponseRaw);
request.Logger?.Write(TraceEventType.Information, "StatusCode=302; 正在重定向...");
if (cookies == null)
{
cookies = new CookieContainer(); //302时必须使用 cookie
}
SetCookies(response, cookies);
www = Convert(data, response.Headers.Location); //构建新的请求
request.Logger?.Write(TraceEventType.Verbose, () => data.Raw);
response = await client.SendAsync(www, source2.Token);
}
timer.OnSend();
request.Response = await Convert(response, request.CookieMode != HttpCookieMode.None);
SetCookies(response, cookies);
request.OnEnd(request.Response);
}
}
catch (Exception ex)
{
timer.OnError();
request.Logger?.Write(TraceEventType.Error, "异步请求中出现错误", ex);
if (ex is TaskCanceledException)
{
ex = new TimeoutException("请求已超时");
}
var res = new HttpResponse {
Exception = ex
};
request.Response = res;
request.OnError(res);
}
finally
{
timer.OnEnd();
request.Logger?.Write(TraceEventType.Verbose, () => request.Response?.ResponseRaw);
request.Logger?.Write(TraceEventType.Information, timer.ToString());
}
((HttpResponse)request.Response).RequestData = data;
return(request.Response);
}