jellyfin/SocketHttpListener/Net/HttpListenerResponse.cs
Luke Pulverenti 71f7fc4e11 3.2.17.12
2017-05-24 15:39:59 -04:00

525 lines
16 KiB
C#

using System;
using System.Globalization;
using System.IO;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Text;
using SocketHttpListener.Primitives;
namespace SocketHttpListener.Net
{
public sealed class HttpListenerResponse : IDisposable
{
bool disposed;
Encoding content_encoding;
long content_length;
bool cl_set;
string content_type;
CookieCollection cookies;
WebHeaderCollection headers = new WebHeaderCollection();
bool keep_alive = true;
Stream output_stream;
Version version = HttpVersion.Version11;
string location;
int status_code = 200;
string status_description = "OK";
bool chunked;
HttpListenerContext context;
internal bool HeadersSent;
internal object headers_lock = new object();
private readonly ILogger _logger;
private readonly ITextEncoding _textEncoding;
private readonly IFileSystem _fileSystem;
internal HttpListenerResponse(HttpListenerContext context, ILogger logger, ITextEncoding textEncoding, IFileSystem fileSystem)
{
this.context = context;
_logger = logger;
_textEncoding = textEncoding;
_fileSystem = fileSystem;
}
internal bool CloseConnection
{
get
{
return headers["Connection"] == "close";
}
}
public Encoding ContentEncoding
{
get
{
if (content_encoding == null)
content_encoding = _textEncoding.GetDefaultEncoding();
return content_encoding;
}
set
{
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
content_encoding = value;
}
}
public long ContentLength64
{
get { return content_length; }
set
{
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
if (HeadersSent)
throw new InvalidOperationException("Cannot be changed after headers are sent.");
if (value < 0)
throw new ArgumentOutOfRangeException("Must be >= 0", "value");
cl_set = true;
content_length = value;
}
}
public string ContentType
{
get { return content_type; }
set
{
// TODO: is null ok?
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
content_type = value;
}
}
// RFC 2109, 2965 + the netscape specification at http://wp.netscape.com/newsref/std/cookie_spec.html
public CookieCollection Cookies
{
get
{
if (cookies == null)
cookies = new CookieCollection();
return cookies;
}
set { cookies = value; } // null allowed?
}
public WebHeaderCollection Headers
{
get { return headers; }
set
{
/**
* "If you attempt to set a Content-Length, Keep-Alive, Transfer-Encoding, or
* WWW-Authenticate header using the Headers property, an exception will be
* thrown. Use the KeepAlive or ContentLength64 properties to set these headers.
* You cannot set the Transfer-Encoding or WWW-Authenticate headers manually."
*/
// TODO: check if this is marked readonly after headers are sent.
headers = value;
}
}
public bool KeepAlive
{
get { return keep_alive; }
set
{
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
keep_alive = value;
}
}
public Stream OutputStream
{
get
{
if (output_stream == null)
output_stream = context.Connection.GetResponseStream();
return output_stream;
}
}
public Version ProtocolVersion
{
get { return version; }
set
{
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
if (value == null)
throw new ArgumentNullException("value");
if (value.Major != 1 || (value.Minor != 0 && value.Minor != 1))
throw new ArgumentException("Must be 1.0 or 1.1", "value");
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
version = value;
}
}
public string RedirectLocation
{
get { return location; }
set
{
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
location = value;
}
}
public bool SendChunked
{
get { return chunked; }
set
{
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
chunked = value;
}
}
public int StatusCode
{
get { return status_code; }
set
{
if (disposed)
throw new ObjectDisposedException(GetType().ToString());
if (value < 100 || value > 999)
throw new ProtocolViolationException("StatusCode must be between 100 and 999.");
status_code = value;
status_description = GetStatusDescription(value);
}
}
internal static string GetStatusDescription(int code)
{
switch (code)
{
case 100: return "Continue";
case 101: return "Switching Protocols";
case 102: return "Processing";
case 200: return "OK";
case 201: return "Created";
case 202: return "Accepted";
case 203: return "Non-Authoritative Information";
case 204: return "No Content";
case 205: return "Reset Content";
case 206: return "Partial Content";
case 207: return "Multi-Status";
case 300: return "Multiple Choices";
case 301: return "Moved Permanently";
case 302: return "Found";
case 303: return "See Other";
case 304: return "Not Modified";
case 305: return "Use Proxy";
case 307: return "Temporary Redirect";
case 400: return "Bad Request";
case 401: return "Unauthorized";
case 402: return "Payment Required";
case 403: return "Forbidden";
case 404: return "Not Found";
case 405: return "Method Not Allowed";
case 406: return "Not Acceptable";
case 407: return "Proxy Authentication Required";
case 408: return "Request Timeout";
case 409: return "Conflict";
case 410: return "Gone";
case 411: return "Length Required";
case 412: return "Precondition Failed";
case 413: return "Request Entity Too Large";
case 414: return "Request-Uri Too Long";
case 415: return "Unsupported Media Type";
case 416: return "Requested Range Not Satisfiable";
case 417: return "Expectation Failed";
case 422: return "Unprocessable Entity";
case 423: return "Locked";
case 424: return "Failed Dependency";
case 500: return "Internal Server Error";
case 501: return "Not Implemented";
case 502: return "Bad Gateway";
case 503: return "Service Unavailable";
case 504: return "Gateway Timeout";
case 505: return "Http Version Not Supported";
case 507: return "Insufficient Storage";
}
return "";
}
public string StatusDescription
{
get { return status_description; }
set
{
status_description = value;
}
}
void IDisposable.Dispose()
{
Close(true); //TODO: Abort or Close?
}
public void Abort()
{
if (disposed)
return;
Close(true);
}
public void AddHeader(string name, string value)
{
if (name == null)
throw new ArgumentNullException("name");
if (name == "")
throw new ArgumentException("'name' cannot be empty", "name");
//TODO: check for forbidden headers and invalid characters
if (value.Length > 65535)
throw new ArgumentOutOfRangeException("value");
headers.Set(name, value);
}
public void AppendCookie(Cookie cookie)
{
if (cookie == null)
throw new ArgumentNullException("cookie");
Cookies.Add(cookie);
}
public void AppendHeader(string name, string value)
{
if (name == null)
throw new ArgumentNullException("name");
if (name == "")
throw new ArgumentException("'name' cannot be empty", "name");
if (value.Length > 65535)
throw new ArgumentOutOfRangeException("value");
headers.Add(name, value);
}
private void Close(bool force)
{
if (force)
{
_logger.Debug("HttpListenerResponse force closing HttpConnection");
}
disposed = true;
context.Connection.Close(force);
}
public void Close()
{
if (disposed)
return;
Close(false);
}
public void Redirect(string url)
{
StatusCode = 302; // Found
location = url;
}
bool FindCookie(Cookie cookie)
{
string name = cookie.Name;
string domain = cookie.Domain;
string path = cookie.Path;
foreach (Cookie c in cookies)
{
if (name != c.Name)
continue;
if (domain != c.Domain)
continue;
if (path == c.Path)
return true;
}
return false;
}
public void DetermineIfChunked()
{
if (chunked)
{
return;
}
Version v = context.Request.ProtocolVersion;
if (!cl_set && !chunked && v >= HttpVersion.Version11)
chunked = true;
if (!chunked && string.Equals(headers["Transfer-Encoding"], "chunked"))
{
chunked = true;
}
}
internal void SendHeaders(bool closing, MemoryStream ms)
{
Encoding encoding = content_encoding;
if (encoding == null)
encoding = _textEncoding.GetDefaultEncoding();
if (content_type != null)
{
if (content_encoding != null && content_type.IndexOf("charset=", StringComparison.OrdinalIgnoreCase) == -1)
{
string enc_name = content_encoding.WebName;
headers.SetInternal("Content-Type", content_type + "; charset=" + enc_name);
}
else
{
headers.SetInternal("Content-Type", content_type);
}
}
if (headers["Server"] == null)
headers.SetInternal("Server", "Mono-HTTPAPI/1.0");
CultureInfo inv = CultureInfo.InvariantCulture;
if (headers["Date"] == null)
headers.SetInternal("Date", DateTime.UtcNow.ToString("r", inv));
if (!chunked)
{
if (!cl_set && closing)
{
cl_set = true;
content_length = 0;
}
if (cl_set)
headers.SetInternal("Content-Length", content_length.ToString(inv));
}
Version v = context.Request.ProtocolVersion;
if (!cl_set && !chunked && v >= HttpVersion.Version11)
chunked = true;
/* Apache forces closing the connection for these status codes:
* HttpStatusCode.BadRequest 400
* HttpStatusCode.RequestTimeout 408
* HttpStatusCode.LengthRequired 411
* HttpStatusCode.RequestEntityTooLarge 413
* HttpStatusCode.RequestUriTooLong 414
* HttpStatusCode.InternalServerError 500
* HttpStatusCode.ServiceUnavailable 503
*/
bool conn_close = status_code == 400 || status_code == 408 || status_code == 411 ||
status_code == 413 || status_code == 414 ||
status_code == 500 ||
status_code == 503;
if (conn_close == false)
conn_close = !context.Request.KeepAlive;
// They sent both KeepAlive: true and Connection: close!?
if (!keep_alive || conn_close)
{
headers.SetInternal("Connection", "close");
conn_close = true;
}
if (chunked)
headers.SetInternal("Transfer-Encoding", "chunked");
//int reuses = context.Connection.Reuses;
//if (reuses >= 100)
//{
// _logger.Debug("HttpListenerResponse - keep alive has exceeded 100 uses and will be closed.");
// force_close_chunked = true;
// if (!conn_close)
// {
// headers.SetInternal("Connection", "close");
// conn_close = true;
// }
//}
if (!conn_close)
{
if (context.Request.ProtocolVersion <= HttpVersion.Version10)
headers.SetInternal("Connection", "keep-alive");
}
if (location != null)
headers.SetInternal("Location", location);
if (cookies != null)
{
foreach (Cookie cookie in cookies)
headers.SetInternal("Set-Cookie", cookie.ToString());
}
headers.SetInternal("Status", status_code.ToString(CultureInfo.InvariantCulture));
using (StreamWriter writer = new StreamWriter(ms, encoding, 256, true))
{
writer.Write("HTTP/{0} {1} {2}\r\n", version, status_code, status_description);
string headers_str = headers.ToStringMultiValue();
writer.Write(headers_str);
writer.Flush();
}
int preamble = encoding.GetPreamble().Length;
if (output_stream == null)
output_stream = context.Connection.GetResponseStream();
/* Assumes that the ms was at position 0 */
ms.Position = preamble;
HeadersSent = true;
}
public void SetCookie(Cookie cookie)
{
if (cookie == null)
throw new ArgumentNullException("cookie");
if (cookies != null)
{
if (FindCookie(cookie))
throw new ArgumentException("The cookie already exists.");
}
else
{
cookies = new CookieCollection();
}
cookies.Add(cookie);
}
public Task TransmitFile(string path, long offset, long count, FileShareMode fileShareMode, CancellationToken cancellationToken)
{
return ((HttpResponseStream)OutputStream).TransmitFile(path, offset, count, fileShareMode, cancellationToken);
}
}
}