internal static async Task ProxyRequest(
this HttpContext context,
Uri destinationUri,
ProxyOptions proxyOptions,
IHttpClientFactory httpClientFactory)
{
using (var requestMessage = context.CreateProxyHttpRequest(destinationUri))
{
if (proxyOptions.PrepareRequest != null)
{
var prepareRequestContext = new PrepareRequestContext(context.Request, context.Connection, requestMessage);
proxyOptions.PrepareRequest(prepareRequestContext);
}
var httpClient = httpClientFactory.CreateClient("ProxyKit");
using (var responseMessage = await httpClient.SendAsync(
requestMessage,
HttpCompletionOption.ResponseHeadersRead,
context.RequestAborted))
{
await context.CopyProxyHttpResponse(responseMessage);
}
}
}
public static void ApplyForwardedHeader(this PrepareRequestContext prepareRequest)
{
var headers = prepareRequest.DestinationRequestMessage.Headers;
var protocol = prepareRequest.IncomingRequest.Protocol;
var @for = prepareRequest.ConnectionInfo.RemoteIpAddress;
var host = prepareRequest.IncomingRequest.Host;
var pathBase = prepareRequest.IncomingRequest.PathBase.Value; // TODO should be escaped?
headers.ApplyForwardedHeaders(@for, host, protocol, pathBase);
}
internal static async Task ProxyRequest(
this HttpContext context,
Uri destinationUri,
ProxyOptions proxyOptions,
IHttpClientFactory httpClientFactory)
{
using (var requestMessage = context.CreateProxyHttpRequest(destinationUri))
{
if (proxyOptions.PrepareRequest != null)
{
var prepareRequestContext = new PrepareRequestContext(context.Request, context.Connection, requestMessage);
proxyOptions.PrepareRequest(prepareRequestContext);
}
var httpClient = httpClientFactory.CreateClient("ProxyKit");
try
{
using (var responseMessage = await httpClient.SendAsync(
requestMessage,
HttpCompletionOption.ResponseHeadersRead,
context.RequestAborted))
{
await context.CopyProxyHttpResponse(responseMessage);
}
}
catch (TaskCanceledException ex)
{
if (RequestHasTimedOut(ex))
{
context.Response.StatusCode = 504;
return;
}
throw;
}
catch (HttpRequestException ex)
{
if (UpstreamIsUnavailable(ex))
{
context.Response.StatusCode = 503;
return;
}
throw;
}
}
}
