public async Task Invoke(HttpContext context)
{
if (_serviceProxy.Matches(context.Request))
{
_logger.LogInformation($"{context.Request.Path}: Handling request using '{typeof(T)}'.");
// Build Request
var proxyRequest = CreateProxyRequest(context);
_serviceProxy.ModifyRequest(context.Request, proxyRequest);
//proxyRequest.Headers.Host = proxyRequest.RequestUri.Host;
_logger.LogInformation($"{context.Request.Path}: Proxing request to '{proxyRequest.Method} {proxyRequest.RequestUri}'.");
if (_logger.IsEnabled(LogLevel.Trace))
{
var headers = proxyRequest.Headers.Concat(proxyRequest.Content?.Headers
?? Enumerable.Empty <KeyValuePair <string, IEnumerable <string> > >());
foreach (var(key, value) in headers)
{
_logger.LogTrace($"{context.Request.Path} Proxy request header '{key}': {string.Join(", ", value)}");
}
}
// Send Request
using var responseMessage = await _httpClient.SendAsync(proxyRequest, HttpCompletionOption.ResponseHeadersRead, context.RequestAborted);
// Build our response.
context.Response.StatusCode = (int)responseMessage.StatusCode;
CopyFromTargetResponseHeaders(responseMessage, context);
_serviceProxy.ModifyResponse(context.Request, context.Response);
await using (var contentStream = await responseMessage.Content.ReadAsStreamAsync())
{
var memoryStream = new MemoryStream();
await contentStream.CopyToAsync(memoryStream);
_serviceProxy.ModifyResponseBody(context.Request, context.Response, memoryStream);
memoryStream.Position = 0;
await memoryStream.CopyToAsync(context.Response.Body);
}
context.Response.ContentLength = null;
_logger.LogInformation($"{context.Request.Path}: Proxied with the result of '{context.Response.StatusCode}'.");
return;
}
await _nextMiddleware(context);
}
