/// <summary>
/// Method that processes the Uri.
/// </summary>
/// <param name="request">Information sent by the browser about the request.</param>
/// <param name="response">Information that is being sent back to the client.</param>
/// <param name="session">Session object used during the client connection.</param>
/// <returns><c>true</c> if this module is able to handle the request, else <c>false</c>.</returns>
/// <exception cref="InternalServerException">If an exception occured in the server.</exception>
/// <exception cref="ForbiddenException">If the file path is forbidden.</exception>
public override bool Process(IHttpRequest request, IHttpResponse response, IHttpSession session)
{
ResourcePath resourcePath;
Uri uri = request.Uri;
if (!uri.AbsolutePath.StartsWith(ResourceHttpAccessUrlUtils.RESOURCE_ACCESS_PATH))
{
return(false);
}
if (!ResourceHttpAccessUrlUtils.ParseResourceURI(uri, out resourcePath))
{
throw new BadRequestException(string.Format("Illegal request syntax. Correct syntax is '{0}'", ResourceHttpAccessUrlUtils.SYNTAX));
}
if (!IsAllowedToAccess(resourcePath))
{
ServiceRegistration.Get <ILogger>().Warn("ResourceAccessModule: Client tries to access forbidden resource '{0}'", resourcePath);
throw new ForbiddenException(string.Format("Access of resource '{0}' not allowed", resourcePath));
}
try
{
IFileSystemResourceAccessor fsra = GetResourceAccessor(resourcePath);
using (Stream resourceStream = fsra.OpenRead())
{
response.ContentType = GuessMimeType(resourceStream, resourcePath.FileName);
if (!string.IsNullOrEmpty(request.Headers["If-Modified-Since"]))
{
DateTime lastRequest = DateTime.Parse(request.Headers["If-Modified-Since"]);
if (lastRequest.CompareTo(fsra.LastChanged) <= 0)
{
response.Status = HttpStatusCode.NotModified;
}
}
response.AddHeader("Last-Modified", fsra.LastChanged.ToUniversalTime().ToString("r"));
string byteRangesSpecifier = request.Headers["Range"];
IList <Range> ranges = ParseRanges(byteRangesSpecifier, resourceStream.Length);
bool onlyHeaders = request.Method == "Headers" || response.Status == HttpStatusCode.NotModified;
if (ranges != null && ranges.Count == 1)
{
// We only support one range
SendRange(response, resourceStream, ranges[0], onlyHeaders);
}
else
{
SendWholeFile(response, resourceStream, onlyHeaders);
}
}
}
catch (FileNotFoundException ex)
{
throw new InternalServerException(string.Format("Failed to proccess resource '{0}'", resourcePath), ex);
}
return(true);
}
/// <summary>
/// Method that processes the Uri.
/// </summary>
public override async Task Invoke(IOwinContext context)
{
var request = context.Request;
var response = context.Response;
ResourcePath resourcePath;
Uri uri = request.Uri;
if (!uri.AbsolutePath.StartsWith(ResourceHttpAccessUrlUtils.RESOURCE_SERVER_BASE_PATH) || !uri.AbsolutePath.Contains(ResourceHttpAccessUrlUtils.RESOURCE_ACCESS_PATH))
{
await Next.Invoke(context);
return;
}
if (!ResourceHttpAccessUrlUtils.ParseResourceURI(uri, out resourcePath))
{
response.StatusCode = (int)HttpStatusCode.BadRequest;
response.ReasonPhrase = string.Format("Illegal request syntax. Correct syntax is '{0}'", ResourceHttpAccessUrlUtils.SYNTAX);
return;
}
if (!IsAllowedToAccess(resourcePath))
{
ServiceRegistration.Get <ILogger>().Warn("ResourceAccessModule: Client tries to access forbidden resource '{0}'", resourcePath);
response.StatusCode = (int)HttpStatusCode.Forbidden;
response.ReasonPhrase = string.Format("Access of resource '{0}' not allowed", resourcePath);
return;
}
try
{
IFileSystemResourceAccessor fsra = GetResourceAccessor(resourcePath);
using (Stream resourceStream = fsra.OpenRead())
{
response.ContentType = GuessMimeType(resourceStream, resourcePath.FileName);
if (!string.IsNullOrEmpty(request.Headers["If-Modified-Since"]))
{
DateTime lastRequest = DateTime.Parse(request.Headers["If-Modified-Since"], System.Globalization.CultureInfo.InvariantCulture);
if (lastRequest.CompareTo(fsra.LastChanged) <= 0)
{
response.StatusCode = (int)HttpStatusCode.NotModified;
}
}
response.Headers["Last-Modified"] = fsra.LastChanged.ToUniversalTime().ToString("r");
string byteRangesSpecifier = request.Headers["Range"];
IList <Range> ranges = ParseRanges(byteRangesSpecifier, resourceStream.Length);
bool onlyHeaders = request.Method == "Headers" || response.StatusCode == (int)HttpStatusCode.NotModified;
CancellationTokenSource cts = new CancellationTokenSource();
if (ranges != null && ranges.Count == 1)
{
// We only support one range
await SendRange(response, resourceStream, ranges[0], onlyHeaders, cts.Token);
}
else
{
await SendWholeFile(response, resourceStream, onlyHeaders, cts.Token);
}
}
}
catch (FileNotFoundException ex)
{
response.StatusCode = (int)HttpStatusCode.InternalServerError;
response.ReasonPhrase = string.Format("Failed to proccess resource '{0}': {1}", resourcePath, ex.Message);
}
}