/// <summary>
/// Writes the specified data to the response.
/// <para>Response is closed and can not be longer modified.</para>
/// </summary>
/// <param name="response">HTTP response.</param>
/// <param name="request">HTTP request used to determine 'Range' header</param>
/// <param name="stream">
/// Data to write.
/// <para>Stream must support seek operation due to 'byte-range' functionality.</para>
/// </param>
/// <param name="mime">Mime type.</param>
public static void AsStream(this HttpListenerResponse response, HttpListenerRequest request, Stream stream, string mime = "octet/stream")
{
if (stream == null)
{
response.WithCode(HttpStatusCode.BadRequest);
throw new ArgumentNullException(nameof(stream));
}
fromStream(request, response, stream, mime);
}
/// <summary>
/// Writes the specified data to the response.
/// <para>Response is closed and can not be longer modified.</para>
/// </summary>
/// <param name="response">HTTP response.</param>
/// <param name="request">HTTP request used to determine 'Range' header</param>
/// <param name="data">Data to write.</param>
/// <param name="mime">Mime type.</param>
public static void AsBytes(this HttpListenerResponse response, HttpListenerRequest request, byte[] data, string mime = "octet/stream")
{
if (data == null)
{
response.WithCode(HttpStatusCode.BadRequest);
throw new ArgumentNullException(nameof(data));
}
var sourceStream = new MemoryStream(data);
fromStream(request, response, sourceStream, mime);
}
/// <summary>
/// Writes the specified file content to the response.
/// <para>Response is closed and can not be longer modified.</para>
/// <para>Built-in support for 'byte-range' response, 'ETag' and 'Last-Modified'.</para>
/// </summary>
/// <param name="response">HTTP response.</param>
/// <param name="request">HTTP request used to determine 'Range' header</param>
/// <param name="fileName">File path with name.</param>
public static void AsFile(this HttpListenerResponse response, HttpListenerRequest request, string fileName)
{
if (!File.Exists(fileName))
{
response.WithCode(HttpStatusCode.NotFound);
throw new FileNotFoundException($"The file '{fileName}' was not found.");
}
if (request.Headers[BYTES_RANGE_HEADER] == null && handleIfCached()) //do not cache partial responses
{
return;
}
var sourceStream = File.OpenRead(fileName);
fromStream(request, response, sourceStream, Tiveria.Common.Net.MimeTypes.GetMimeType(Path.GetExtension(fileName)));
bool handleIfCached()
{
var lastModified = File.GetLastWriteTimeUtc(fileName);
response.Headers["ETag"] = lastModified.Ticks.ToString("x");
response.Headers["Last-Modified"] = lastModified.ToString("R");
var ifNoneMatch = request.Headers["If-None-Match"];
if (ifNoneMatch != null)
{
var eTags = ifNoneMatch.Split(',').Select(x => x.Trim()).ToArray();
if (eTags.Contains(response.Headers["ETag"]))
{
response.StatusCode = (int)HttpStatusCode.NotModified;
response.Close();
return(true);
}
}
var dateExists = DateTime.TryParse(request.Headers["If-Modified-Since"], out DateTime ifModifiedSince); //only for GET requests
if (dateExists)
{
if (lastModified <= ifModifiedSince)
{
response.StatusCode = (int)HttpStatusCode.NotModified;
response.Close();
return(true);
}
}
return(false);
}
}
