/// <summary>
/// Dispatch the WebDAV request based on the given HTTP context.
/// </summary>
/// <param name="httpContext">
/// HTTP context for this request.
/// </param>
/// <returns>
/// A task that represents the request dispatching operation.
/// </returns>
public async Task DispatchRequestAsync(IHttpContext httpContext)
{
// Make sure a HTTP context is specified
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
// Make sure the HTTP context has a request
var request = httpContext.Request;
if (request == null)
{
throw new ArgumentException("The HTTP context doesn't have a request.", nameof(httpContext));
}
// Make sure the HTTP context has a response
var response = httpContext.Response;
if (response == null)
{
throw new ArgumentException("The HTTP context doesn't have a response.", nameof(httpContext));
}
// Determine the request log-string
var logRequest = $"{request.HttpMethod}:{request.Url}:{request.RemoteEndPoint}";
var range = request.GetRange();
if (null != range)
{
logRequest += $" ({range.Start?.ToString() ?? string.Empty}-{range.End?.ToString() ?? string.Empty})";
}
// Log the request
s_log.Log(LogLevel.Info, () => $"{logRequest} - Start processing");
try
{
// Set the Server header of the response message. This has no
// functional use, but it can be used to diagnose problems by
// determining the actual WebDAV server and version.
response.SetHeaderValue("Server", s_serverName);
// Start the stopwatch
var sw = Stopwatch.StartNew();
IRequestHandler requestHandler;
try
{
// Obtain the request handler for this message
requestHandler = _requestHandlerFactory.GetRequestHandler(httpContext);
// Make sure we got a request handler
if (requestHandler == null)
{
// Log warning
s_log.Log(LogLevel.Warning, () => $"{logRequest} - Not implemented.");
// This request is not implemented
httpContext.Response.SetStatus(DavStatusCode.NotImplemented);
return;
}
}
catch (Exception exc)
{
// Log error
s_log.Log(LogLevel.Error, $"Unexpected exception while trying to obtain the request handler (method={request.HttpMethod}, url={request.Url}, source={request.RemoteEndPoint}", exc);
// Abort
return;
}
try
{
// Handle the request
if (await requestHandler.HandleRequestAsync(httpContext, _store).ConfigureAwait(false))
{
// Log processing duration
s_log.Log(LogLevel.Info, () => $"{logRequest} - Finished processing ({sw.ElapsedMilliseconds}ms, HTTP result: {httpContext.Response.Status})");
}
else
{
// Log warning
s_log.Log(LogLevel.Warning, () => $"{logRequest} - Not processed.");
// Set status code to bad request
httpContext.Response.SetStatus(DavStatusCode.NotImplemented);
}
}
catch (HttpListenerException hle) when(hle.ErrorCode == ERROR_OPERATION_ABORTED)
{
s_log.Log(LogLevel.Error, $"Operation aborted at (method={request.HttpMethod}, url={request.Url}, source={request.RemoteEndPoint}");
}
// happens when client cancel operation, usially nothing to scare
catch (HttpListenerException hle) when(hle.ErrorCode == ERROR_CONNECTION_INVALID)
{
s_log.Log(LogLevel.Error, $"An operation was attempted on a nonexistent network connection at (method={request.HttpMethod}, url={request.Url}, source={request.RemoteEndPoint}");
}
// happens when client cancel operation, usially nothing to scare
catch (HttpListenerException hle) when(hle.ErrorCode == ERROR_NETNAME_DELETED)
{
s_log.Log(LogLevel.Error, $"The specified network name is no longer available at (method={request.HttpMethod}, url={request.Url}, source={request.RemoteEndPoint}");
}
catch (HttpListenerException excListener)
{
if (excListener.ErrorCode != ERROR_OPERATION_ABORTED)
{
throw;
}
}
catch (AggregateException aex) when(aex.InnerExceptions.Count == 1 &&
aex.InnerExceptions[0] is AuthenticationException auex)
{
var status = DavStatusCode.Unauthorized;
httpContext.Response.SetStatus(status);
httpContext.Response.StatusDescription = $"{status.GetStatusDescription()}: {auex.Message}";
s_log.Log(LogLevel.Error, $"Error while handling request (method={request.HttpMethod}, url={request.Url} {httpContext.Response.StatusDescription}");
}
catch (Exception exc)
{
s_log.Log(LogLevel.Error, $"Unexpected exception while handling request (method={request.HttpMethod}, url={request.Url}, source={request.RemoteEndPoint}", exc);
//, source={request.RemoteEndPoint}", exc); // request.RemoteEndPoint may be disposed
try
{
// Attempt to return 'InternalServerError' (if still possible)
httpContext.Response.SetStatus(DavStatusCode.InternalServerError);
}
catch
{
// We might not be able to send the response, because a response
// was already initiated by the the request handler.
}
}
finally
{
// Check if we need to dispose the request handler
// ReSharper disable once SuspiciousTypeConversion.Global
(requestHandler as IDisposable)?.Dispose();
}
}
finally
{
// Always close the context
await httpContext.CloseAsync().ConfigureAwait(false);
}
}
/// <summary>
/// Dispatch the WebDAV request based on the given HTTP context.
/// </summary>
/// <param name="httpContext">
/// HTTP context for this request.
/// </param>
/// <returns>
/// A task that represents the request dispatching operation.
/// </returns>
public async Task DispatchRequestAsync(IHttpContext httpContext)
{
// Make sure a HTTP context is specified
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
// Make sure the HTTP context has a request
var request = httpContext.Request;
if (request == null)
{
throw new ArgumentException("The HTTP context doesn't have a request.", nameof(httpContext));
}
// Make sure the HTTP context has a response
var response = httpContext.Response;
if (response == null)
{
throw new ArgumentException("The HTTP context doesn't have a response.", nameof(httpContext));
}
// Determine the request log-string
var logRequest = $"{request.HttpMethod}:{request.Url}:{request.RemoteEndPoint}";
// Log the request
s_log.Log(LogLevel.Info, () => $"{logRequest} - Start processing");
try
{
// Set the Server header of the response message. This has no
// functional use, but it can be used to diagnose problems by
// determining the actual WebDAV server and version.
response.SetHeaderValue("Server", s_serverName);
// Start the stopwatch
var sw = Stopwatch.StartNew();
IRequestHandler requestHandler;
try
{
// Obtain the request handler for this message
requestHandler = _requestHandlerFactory.GetRequestHandler(httpContext);
// Make sure we got a request handler
if (requestHandler == null)
{
// Log warning
s_log.Log(LogLevel.Warning, () => $"{logRequest} - Not implemented.");
// This request is not implemented
httpContext.Response.SetStatus(DavStatusCode.NotImplemented);
return;
}
}
catch (Exception exc)
{
// Log error
s_log.Log(LogLevel.Error, () => $"Unexpected exception while trying to obtain the request handler (method={request.HttpMethod}, url={request.Url}, source={request.RemoteEndPoint}", exc);
// Abort
return;
}
try
{
// Handle the request
if (await requestHandler.HandleRequestAsync(httpContext, _store).ConfigureAwait(false))
{
// Log processing duration
s_log.Log(LogLevel.Info, () => $"{logRequest} - Finished processing ({sw.ElapsedMilliseconds}ms, HTTP result: {httpContext.Response.Status})");
}
else
{
// Log warning
s_log.Log(LogLevel.Warning, () => $"{logRequest} - Not processed.");
// Set status code to bad request
httpContext.Response.SetStatus(DavStatusCode.NotImplemented);
}
}
catch (Exception exc)
{
// Log what's going wrong
s_log.Log(LogLevel.Error, () => $"Unexpected exception while handling request (method={request.HttpMethod}, url={request.Url}, source={request.RemoteEndPoint}", exc);
try
{
// Attempt to return 'InternalServerError' (if still possible)
httpContext.Response.SetStatus(DavStatusCode.InternalServerError);
}
catch
{
// We might not be able to send the response, because a response
// was already initiated by the the request handler.
}
}
finally
{
// Check if we need to dispose the request handler
// ReSharper disable once SuspiciousTypeConversion.Global
(requestHandler as IDisposable)?.Dispose();
}
}
finally
{
// Always close the context
await httpContext.CloseAsync().ConfigureAwait(false);
}
}