648 lines
20 KiB
C#
648 lines
20 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Globalization;
|
|
using System.IO;
|
|
using System.Net;
|
|
using System.Text;
|
|
using System.Threading.Tasks;
|
|
using MediaBrowser.Model.Services;
|
|
using Microsoft.Extensions.Primitives;
|
|
using Microsoft.Net.Http.Headers;
|
|
|
|
namespace Emby.Server.Implementations.SocketSharp
|
|
{
|
|
public partial class WebSocketSharpRequest : IHttpRequest
|
|
{
|
|
internal static string GetParameter(ReadOnlySpan<char> header, string attr)
|
|
{
|
|
int ap = header.IndexOf(attr.AsSpan(), StringComparison.Ordinal);
|
|
if (ap == -1)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
ap += attr.Length;
|
|
if (ap >= header.Length)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
char ending = header[ap];
|
|
if (ending != '"')
|
|
{
|
|
ending = ' ';
|
|
}
|
|
|
|
var slice = header.Slice(ap + 1);
|
|
int end = slice.IndexOf(ending);
|
|
if (end == -1)
|
|
{
|
|
return ending == '"' ? null : header.Slice(ap).ToString();
|
|
}
|
|
|
|
return slice.Slice(0, end - ap - 1).ToString();
|
|
}
|
|
|
|
private async Task LoadMultiPart(WebROCollection form)
|
|
{
|
|
string boundary = GetParameter(ContentType.AsSpan(), "; boundary=");
|
|
if (boundary == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
using (var requestStream = InputStream)
|
|
{
|
|
// DB: 30/01/11 - Hack to get around non-seekable stream and received HTTP request
|
|
// Not ending with \r\n?
|
|
var ms = new MemoryStream(32 * 1024);
|
|
await requestStream.CopyToAsync(ms).ConfigureAwait(false);
|
|
|
|
var input = ms;
|
|
ms.WriteByte((byte)'\r');
|
|
ms.WriteByte((byte)'\n');
|
|
|
|
input.Position = 0;
|
|
|
|
// Uncomment to debug
|
|
// var content = new StreamReader(ms).ReadToEnd();
|
|
// Console.WriteLine(boundary + "::" + content);
|
|
// input.Position = 0;
|
|
|
|
var multi_part = new HttpMultipart(input, boundary, ContentEncoding);
|
|
|
|
HttpMultipart.Element e;
|
|
while ((e = multi_part.ReadNextElement()) != null)
|
|
{
|
|
if (e.Filename == null)
|
|
{
|
|
byte[] copy = new byte[e.Length];
|
|
|
|
input.Position = e.Start;
|
|
await input.ReadAsync(copy, 0, (int)e.Length).ConfigureAwait(false);
|
|
|
|
form.Add(e.Name, (e.Encoding ?? ContentEncoding).GetString(copy, 0, copy.Length));
|
|
}
|
|
else
|
|
{
|
|
// We use a substream, as in 2.x we will support large uploads streamed to disk,
|
|
files[e.Name] = new HttpPostedFile(e.Filename, e.ContentType, input, e.Start, e.Length);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public async Task<QueryParamCollection> GetFormData()
|
|
{
|
|
var form = new WebROCollection();
|
|
files = new Dictionary<string, HttpPostedFile>();
|
|
|
|
if (IsContentType("multipart/form-data"))
|
|
{
|
|
await LoadMultiPart(form).ConfigureAwait(false);
|
|
}
|
|
else if (IsContentType("application/x-www-form-urlencoded"))
|
|
{
|
|
await LoadWwwForm(form).ConfigureAwait(false);
|
|
}
|
|
|
|
if (validate_form && !checked_form)
|
|
{
|
|
checked_form = true;
|
|
ValidateNameValueCollection("Form", form);
|
|
}
|
|
|
|
return form;
|
|
}
|
|
|
|
public string Accept => StringValues.IsNullOrEmpty(request.Headers[HeaderNames.Accept]) ? null : request.Headers[HeaderNames.Accept].ToString();
|
|
|
|
public string Authorization => StringValues.IsNullOrEmpty(request.Headers[HeaderNames.Authorization]) ? null : request.Headers[HeaderNames.Authorization].ToString();
|
|
|
|
protected bool validate_form { get; set; }
|
|
protected bool checked_form { get; set; }
|
|
|
|
private static void ThrowValidationException(string name, string key, string value)
|
|
{
|
|
string v = "\"" + value + "\"";
|
|
if (v.Length > 20)
|
|
{
|
|
v = v.Substring(0, 16) + "...\"";
|
|
}
|
|
|
|
string msg = string.Format(
|
|
CultureInfo.InvariantCulture,
|
|
"A potentially dangerous Request.{0} value was detected from the client ({1}={2}).",
|
|
name,
|
|
key,
|
|
v);
|
|
|
|
throw new Exception(msg);
|
|
}
|
|
|
|
private static void ValidateNameValueCollection(string name, QueryParamCollection coll)
|
|
{
|
|
if (coll == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
foreach (var pair in coll)
|
|
{
|
|
var key = pair.Name;
|
|
var val = pair.Value;
|
|
if (val != null && val.Length > 0 && IsInvalidString(val))
|
|
{
|
|
ThrowValidationException(name, key, val);
|
|
}
|
|
}
|
|
}
|
|
|
|
internal static bool IsInvalidString(string val)
|
|
=> IsInvalidString(val, out var validationFailureIndex);
|
|
|
|
internal static bool IsInvalidString(string val, out int validationFailureIndex)
|
|
{
|
|
validationFailureIndex = 0;
|
|
|
|
int len = val.Length;
|
|
if (len < 2)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
char current = val[0];
|
|
for (int idx = 1; idx < len; idx++)
|
|
{
|
|
char next = val[idx];
|
|
|
|
// See http://secunia.com/advisories/14325
|
|
if (current == '<' || current == '\xff1c')
|
|
{
|
|
if (next == '!' || next < ' '
|
|
|| (next >= 'a' && next <= 'z')
|
|
|| (next >= 'A' && next <= 'Z'))
|
|
{
|
|
validationFailureIndex = idx - 1;
|
|
return true;
|
|
}
|
|
}
|
|
else if (current == '&' && next == '#')
|
|
{
|
|
validationFailureIndex = idx - 1;
|
|
return true;
|
|
}
|
|
|
|
current = next;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private bool IsContentType(string ct)
|
|
{
|
|
if (ContentType == null)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return ContentType.StartsWith(ct, StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
private async Task LoadWwwForm(WebROCollection form)
|
|
{
|
|
using (var input = InputStream)
|
|
{
|
|
using (var ms = new MemoryStream())
|
|
{
|
|
await input.CopyToAsync(ms).ConfigureAwait(false);
|
|
ms.Position = 0;
|
|
|
|
using (var s = new StreamReader(ms, ContentEncoding))
|
|
{
|
|
var key = new StringBuilder();
|
|
var value = new StringBuilder();
|
|
int c;
|
|
|
|
while ((c = s.Read()) != -1)
|
|
{
|
|
if (c == '=')
|
|
{
|
|
value.Length = 0;
|
|
while ((c = s.Read()) != -1)
|
|
{
|
|
if (c == '&')
|
|
{
|
|
AddRawKeyValue(form, key, value);
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
value.Append((char)c);
|
|
}
|
|
}
|
|
|
|
if (c == -1)
|
|
{
|
|
AddRawKeyValue(form, key, value);
|
|
return;
|
|
}
|
|
}
|
|
else if (c == '&')
|
|
{
|
|
AddRawKeyValue(form, key, value);
|
|
}
|
|
else
|
|
{
|
|
key.Append((char)c);
|
|
}
|
|
}
|
|
|
|
if (c == -1)
|
|
{
|
|
AddRawKeyValue(form, key, value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void AddRawKeyValue(WebROCollection form, StringBuilder key, StringBuilder value)
|
|
{
|
|
form.Add(WebUtility.UrlDecode(key.ToString()), WebUtility.UrlDecode(value.ToString()));
|
|
|
|
key.Length = 0;
|
|
value.Length = 0;
|
|
}
|
|
|
|
private Dictionary<string, HttpPostedFile> files;
|
|
|
|
private class WebROCollection : QueryParamCollection
|
|
{
|
|
public override string ToString()
|
|
{
|
|
var result = new StringBuilder();
|
|
foreach (var pair in this)
|
|
{
|
|
if (result.Length > 0)
|
|
{
|
|
result.Append('&');
|
|
}
|
|
|
|
var key = pair.Name;
|
|
if (key != null && key.Length > 0)
|
|
{
|
|
result.Append(key);
|
|
result.Append('=');
|
|
}
|
|
|
|
result.Append(pair.Value);
|
|
}
|
|
|
|
return result.ToString();
|
|
}
|
|
}
|
|
private class HttpMultipart
|
|
{
|
|
|
|
public class Element
|
|
{
|
|
public string ContentType { get; set; }
|
|
|
|
public string Name { get; set; }
|
|
|
|
public string Filename { get; set; }
|
|
|
|
public Encoding Encoding { get; set; }
|
|
|
|
public long Start { get; set; }
|
|
|
|
public long Length { get; set; }
|
|
|
|
public override string ToString()
|
|
{
|
|
return "ContentType " + ContentType + ", Name " + Name + ", Filename " + Filename + ", Start " +
|
|
Start.ToString(CultureInfo.CurrentCulture) + ", Length " + Length.ToString(CultureInfo.CurrentCulture);
|
|
}
|
|
}
|
|
|
|
private const byte LF = (byte)'\n';
|
|
|
|
private const byte CR = (byte)'\r';
|
|
|
|
private Stream data;
|
|
|
|
private string boundary;
|
|
|
|
private byte[] boundaryBytes;
|
|
|
|
private byte[] buffer;
|
|
|
|
private bool atEof;
|
|
|
|
private Encoding encoding;
|
|
|
|
private StringBuilder sb;
|
|
|
|
// See RFC 2046
|
|
// In the case of multipart entities, in which one or more different
|
|
// sets of data are combined in a single body, a "multipart" media type
|
|
// field must appear in the entity's header. The body must then contain
|
|
// one or more body parts, each preceded by a boundary delimiter line,
|
|
// and the last one followed by a closing boundary delimiter line.
|
|
// After its boundary delimiter line, each body part then consists of a
|
|
// header area, a blank line, and a body area. Thus a body part is
|
|
// similar to an RFC 822 message in syntax, but different in meaning.
|
|
|
|
public HttpMultipart(Stream data, string b, Encoding encoding)
|
|
{
|
|
this.data = data;
|
|
boundary = b;
|
|
boundaryBytes = encoding.GetBytes(b);
|
|
buffer = new byte[boundaryBytes.Length + 2]; // CRLF or '--'
|
|
this.encoding = encoding;
|
|
sb = new StringBuilder();
|
|
}
|
|
|
|
public Element ReadNextElement()
|
|
{
|
|
if (atEof || ReadBoundary())
|
|
{
|
|
return null;
|
|
}
|
|
|
|
var elem = new Element();
|
|
ReadOnlySpan<char> header;
|
|
while ((header = ReadLine().AsSpan()).Length != 0)
|
|
{
|
|
if (header.StartsWith("Content-Disposition:".AsSpan(), StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
elem.Name = GetContentDispositionAttribute(header, "name");
|
|
elem.Filename = StripPath(GetContentDispositionAttributeWithEncoding(header, "filename"));
|
|
}
|
|
else if (header.StartsWith("Content-Type:".AsSpan(), StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
elem.ContentType = header.Slice("Content-Type:".Length).Trim().ToString();
|
|
elem.Encoding = GetEncoding(elem.ContentType);
|
|
}
|
|
}
|
|
|
|
long start = data.Position;
|
|
elem.Start = start;
|
|
long pos = MoveToNextBoundary();
|
|
if (pos == -1)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
elem.Length = pos - start;
|
|
return elem;
|
|
}
|
|
|
|
private string ReadLine()
|
|
{
|
|
// CRLF or LF are ok as line endings.
|
|
bool got_cr = false;
|
|
int b = 0;
|
|
sb.Length = 0;
|
|
while (true)
|
|
{
|
|
b = data.ReadByte();
|
|
if (b == -1)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (b == LF)
|
|
{
|
|
break;
|
|
}
|
|
|
|
got_cr = b == CR;
|
|
sb.Append((char)b);
|
|
}
|
|
|
|
if (got_cr)
|
|
{
|
|
sb.Length--;
|
|
}
|
|
|
|
return sb.ToString();
|
|
}
|
|
|
|
private static string GetContentDispositionAttribute(ReadOnlySpan<char> l, string name)
|
|
{
|
|
int idx = l.IndexOf((name + "=\"").AsSpan(), StringComparison.Ordinal);
|
|
if (idx < 0)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
int begin = idx + name.Length + "=\"".Length;
|
|
int end = l.Slice(begin).IndexOf('"');
|
|
if (end < 0)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (begin == end)
|
|
{
|
|
return string.Empty;
|
|
}
|
|
|
|
return l.Slice(begin, end - begin).ToString();
|
|
}
|
|
|
|
private string GetContentDispositionAttributeWithEncoding(ReadOnlySpan<char> l, string name)
|
|
{
|
|
int idx = l.IndexOf((name + "=\"").AsSpan(), StringComparison.Ordinal);
|
|
if (idx < 0)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
int begin = idx + name.Length + "=\"".Length;
|
|
int end = l.Slice(begin).IndexOf('"');
|
|
if (end < 0)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (begin == end)
|
|
{
|
|
return string.Empty;
|
|
}
|
|
|
|
ReadOnlySpan<char> temp = l.Slice(begin, end - begin);
|
|
byte[] source = new byte[temp.Length];
|
|
for (int i = temp.Length - 1; i >= 0; i--)
|
|
{
|
|
source[i] = (byte)temp[i];
|
|
}
|
|
|
|
return encoding.GetString(source, 0, source.Length);
|
|
}
|
|
|
|
private bool ReadBoundary()
|
|
{
|
|
try
|
|
{
|
|
string line;
|
|
do
|
|
{
|
|
line = ReadLine();
|
|
}
|
|
while (line.Length == 0);
|
|
|
|
if (line[0] != '-' || line[1] != '-')
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (!line.EndsWith(boundary, StringComparison.Ordinal))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private static bool CompareBytes(byte[] orig, byte[] other)
|
|
{
|
|
for (int i = orig.Length - 1; i >= 0; i--)
|
|
{
|
|
if (orig[i] != other[i])
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private long MoveToNextBoundary()
|
|
{
|
|
long retval = 0;
|
|
bool got_cr = false;
|
|
|
|
int state = 0;
|
|
int c = data.ReadByte();
|
|
while (true)
|
|
{
|
|
if (c == -1)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if (state == 0 && c == LF)
|
|
{
|
|
retval = data.Position - 1;
|
|
if (got_cr)
|
|
{
|
|
retval--;
|
|
}
|
|
|
|
state = 1;
|
|
c = data.ReadByte();
|
|
}
|
|
else if (state == 0)
|
|
{
|
|
got_cr = c == CR;
|
|
c = data.ReadByte();
|
|
}
|
|
else if (state == 1 && c == '-')
|
|
{
|
|
c = data.ReadByte();
|
|
if (c == -1)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if (c != '-')
|
|
{
|
|
state = 0;
|
|
got_cr = false;
|
|
continue; // no ReadByte() here
|
|
}
|
|
|
|
int nread = data.Read(buffer, 0, buffer.Length);
|
|
int bl = buffer.Length;
|
|
if (nread != bl)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if (!CompareBytes(boundaryBytes, buffer))
|
|
{
|
|
state = 0;
|
|
data.Position = retval + 2;
|
|
if (got_cr)
|
|
{
|
|
data.Position++;
|
|
got_cr = false;
|
|
}
|
|
|
|
c = data.ReadByte();
|
|
continue;
|
|
}
|
|
|
|
if (buffer[bl - 2] == '-' && buffer[bl - 1] == '-')
|
|
{
|
|
atEof = true;
|
|
}
|
|
else if (buffer[bl - 2] != CR || buffer[bl - 1] != LF)
|
|
{
|
|
state = 0;
|
|
data.Position = retval + 2;
|
|
if (got_cr)
|
|
{
|
|
data.Position++;
|
|
got_cr = false;
|
|
}
|
|
|
|
c = data.ReadByte();
|
|
continue;
|
|
}
|
|
|
|
data.Position = retval + 2;
|
|
if (got_cr)
|
|
{
|
|
data.Position++;
|
|
}
|
|
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
// state == 1
|
|
state = 0; // no ReadByte() here
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
private static string StripPath(string path)
|
|
{
|
|
if (path == null || path.Length == 0)
|
|
{
|
|
return path;
|
|
}
|
|
|
|
if (path.IndexOf(":\\", StringComparison.Ordinal) != 1
|
|
&& !path.StartsWith("\\\\", StringComparison.Ordinal))
|
|
{
|
|
return path;
|
|
}
|
|
|
|
return path.Substring(path.LastIndexOf('\\') + 1);
|
|
}
|
|
}
|
|
}
|
|
}
|