private IChromelyResource HandleResourceError(bool fileExists, int fileSize, Exception exception = null)
{
if (exception != null)
{
Logger.Instance.Log.LogError(exception, exception.Message);
}
var resource = new ChromelyResource();
if (!fileExists)
{
resource.StatusCode = HttpStatusCode.NotFound;
resource.StatusText = "Resource loading error: file size is zero.";
resource.Content = resource.StatusText.GetMemoryStream();
}
else if (fileSize == 0)
{
resource.StatusCode = HttpStatusCode.NotFound;
resource.StatusText = "Resource loading error: file size is zero.";
resource.Content = resource.StatusText.GetMemoryStream();
}
else
{
resource.StatusCode = HttpStatusCode.BadRequest;
resource.StatusText = "Resource loading error";
resource.Content = resource.StatusText.GetMemoryStream();
}
return(resource);
}
/// <summary>
/// Read the request, then process it through the OWIN pipeline
/// then populate the response properties.
/// </summary>
/// <param name="request">request</param>
/// <param name="callback">callback</param>
/// <returns>always returns true as we'll handle all requests this handler is registered for.</returns>
public override CefReturnValue ProcessRequestAsync(CefRequest request, CefCallback callback)
{
var requestBody = Stream.Null;
if (request.Method == "POST")
{
using var postData = request.PostData;
if (postData is not null)
{
var postDataElements = postData.GetElements();
var firstPostDataElement = postDataElements.First();
var bytes = firstPostDataElement.GetBytes();
requestBody = new MemoryStream(bytes, 0, bytes.Length);
}
}
var uri = new Uri(request.Url);
var requestHeaders = request.GetHeaderMap();
//Add Host header as per http://owin.org/html/owin.html#5-2-hostname
requestHeaders.Add("Host", uri.Host + (uri.Port > 0 ? (":" + uri.Port) : ""));
Task.Run(async() =>
{
IChromelyResource chromelyResource = new ChromelyResource();
try
{
// Call into the OWIN pipeline
var owinRequest = new ResourceRequest(request.Url, request.Method, requestHeaders, requestBody);
var owinResponse = await RequestInterceptor.ProcessRequest(_owinPipeline.AppFunc, owinRequest);
chromelyResource = new ChromelyResource()
{
Content = owinResponse.Stream as MemoryStream,
MimeType = owinResponse.Headers.GetMimeType(),
StatusCode = (HttpStatusCode)owinResponse.StatusCode,
StatusText = owinResponse.ReasonPhrase,
Headers = owinResponse.Headers
};
if (chromelyResource.StatusCode.IsClientErrorCode() || chromelyResource.StatusCode.IsServerErrorCode())
{
chromelyResource = await _errorHandler.HandleErrorAsync(request.Url, chromelyResource, null);
}
}
catch (Exception exception)
{
chromelyResource = await _errorHandler.HandleErrorAsync(request.Url, chromelyResource, exception);
}
//Populate the response properties
Stream = chromelyResource.Content ?? Stream.Null;
ResponseLength = (chromelyResource.Content == null) ? 0 : chromelyResource.Content.Length;
StatusCode = (int)chromelyResource.StatusCode;
MimeType = chromelyResource.MimeType;
foreach (var header in chromelyResource.Headers)
{
//It's possible for headers to have multiple values
foreach (var val in header.Value)
{
Headers.Add(header.Key, val);
}
}
//Once we've finished populating the properties we execute the callback
//Callback wraps an unmanaged resource, so let's explicitly Dispose when we're done
using (callback)
{
callback.Continue();
}
});
return(CefReturnValue.ContinueAsync);
}
