808 lines
26 KiB
C#
808 lines
26 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.Globalization;
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using System.IO;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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using MediaBrowser.Model.Services;
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namespace EmbyServer.SocketSharp
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{
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public partial class WebSocketSharpRequest : IHttpRequest
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{
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static internal string GetParameter(string header, string attr)
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{
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int ap = header.IndexOf(attr);
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if (ap == -1)
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return null;
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ap += attr.Length;
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if (ap >= header.Length)
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return null;
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char ending = header[ap];
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if (ending != '"')
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ending = ' ';
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int end = header.IndexOf(ending, ap + 1);
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if (end == -1)
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return ending == '"' ? null : header.Substring(ap);
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return header.Substring(ap + 1, end - ap - 1);
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}
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async Task LoadMultiPart(WebROCollection form)
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{
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string boundary = GetParameter(ContentType, "; boundary=");
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if (boundary == null)
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return;
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using (var requestStream = InputStream)
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{
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//DB: 30/01/11 - Hack to get around non-seekable stream and received HTTP request
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//Not ending with \r\n?
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var ms = new MemoryStream(32 * 1024);
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await requestStream.CopyToAsync(ms).ConfigureAwait(false);
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var input = ms;
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ms.WriteByte((byte)'\r');
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ms.WriteByte((byte)'\n');
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input.Position = 0;
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//Uncomment to debug
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//var content = new StreamReader(ms).ReadToEnd();
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//Console.WriteLine(boundary + "::" + content);
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//input.Position = 0;
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var multi_part = new HttpMultipart(input, boundary, ContentEncoding);
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HttpMultipart.Element e;
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while ((e = multi_part.ReadNextElement()) != null)
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{
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if (e.Filename == null)
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{
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byte[] copy = new byte[e.Length];
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input.Position = e.Start;
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input.Read(copy, 0, (int)e.Length);
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form.Add(e.Name, (e.Encoding ?? ContentEncoding).GetString(copy, 0, copy.Length));
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}
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else
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{
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//
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// We use a substream, as in 2.x we will support large uploads streamed to disk,
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//
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HttpPostedFile sub = new HttpPostedFile(e.Filename, e.ContentType, input, e.Start, e.Length);
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files[e.Name] = sub;
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}
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}
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}
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}
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public async Task<QueryParamCollection> GetFormData()
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{
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var form = new WebROCollection();
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files = new Dictionary<string, HttpPostedFile>();
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if (IsContentType("multipart/form-data", true))
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{
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await LoadMultiPart(form).ConfigureAwait(false);
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}
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else if (IsContentType("application/x-www-form-urlencoded", true))
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{
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await LoadWwwForm(form).ConfigureAwait(false);
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}
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#if NET_4_0
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if (validateRequestNewMode && !checked_form) {
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// Setting this before calling the validator prevents
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// possible endless recursion
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checked_form = true;
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ValidateNameValueCollection ("Form", query_string_nvc, RequestValidationSource.Form);
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} else
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#endif
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if (validate_form && !checked_form)
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{
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checked_form = true;
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ValidateNameValueCollection("Form", form);
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}
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return form;
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}
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public string Accept
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{
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get
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{
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return string.IsNullOrEmpty(request.Headers["Accept"]) ? null : request.Headers["Accept"];
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}
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}
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public string Authorization
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{
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get
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{
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return string.IsNullOrEmpty(request.Headers["Authorization"]) ? null : request.Headers["Authorization"];
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}
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}
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protected bool validate_cookies, validate_query_string, validate_form;
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protected bool checked_cookies, checked_query_string, checked_form;
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static void ThrowValidationException(string name, string key, string value)
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{
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string v = "\"" + value + "\"";
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if (v.Length > 20)
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v = v.Substring(0, 16) + "...\"";
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string msg = String.Format("A potentially dangerous Request.{0} value was " +
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"detected from the client ({1}={2}).", name, key, v);
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throw new Exception(msg);
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}
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static void ValidateNameValueCollection(string name, QueryParamCollection coll)
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{
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if (coll == null)
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return;
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foreach (var pair in coll)
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{
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var key = pair.Name;
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var val = pair.Value;
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if (val != null && val.Length > 0 && IsInvalidString(val))
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ThrowValidationException(name, key, val);
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}
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}
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internal static bool IsInvalidString(string val)
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{
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int validationFailureIndex;
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return IsInvalidString(val, out validationFailureIndex);
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}
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internal static bool IsInvalidString(string val, out int validationFailureIndex)
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{
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validationFailureIndex = 0;
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int len = val.Length;
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if (len < 2)
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return false;
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char current = val[0];
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for (int idx = 1; idx < len; idx++)
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{
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char next = val[idx];
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// See http://secunia.com/advisories/14325
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if (current == '<' || current == '\xff1c')
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{
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if (next == '!' || next < ' '
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|| (next >= 'a' && next <= 'z')
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|| (next >= 'A' && next <= 'Z'))
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{
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validationFailureIndex = idx - 1;
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return true;
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}
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}
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else if (current == '&' && next == '#')
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{
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validationFailureIndex = idx - 1;
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return true;
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}
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current = next;
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}
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return false;
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}
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public void ValidateInput()
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{
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validate_cookies = true;
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validate_query_string = true;
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validate_form = true;
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}
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bool IsContentType(string ct, bool starts_with)
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{
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if (ct == null || ContentType == null) return false;
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if (starts_with)
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return StrUtils.StartsWith(ContentType, ct, true);
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return string.Equals(ContentType, ct, StringComparison.OrdinalIgnoreCase);
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}
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async Task LoadWwwForm(WebROCollection form)
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{
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using (Stream input = InputStream)
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{
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using (var ms = new MemoryStream())
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{
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await input.CopyToAsync(ms).ConfigureAwait(false);
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ms.Position = 0;
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using (StreamReader s = new StreamReader(ms, ContentEncoding))
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{
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StringBuilder key = new StringBuilder();
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StringBuilder value = new StringBuilder();
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int c;
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while ((c = s.Read()) != -1)
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{
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if (c == '=')
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{
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value.Length = 0;
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while ((c = s.Read()) != -1)
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{
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if (c == '&')
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{
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AddRawKeyValue(form, key, value);
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break;
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}
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else
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value.Append((char)c);
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}
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if (c == -1)
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{
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AddRawKeyValue(form, key, value);
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return;
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}
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}
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else if (c == '&')
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AddRawKeyValue(form, key, value);
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else
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key.Append((char)c);
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}
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if (c == -1)
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AddRawKeyValue(form, key, value);
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}
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}
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}
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}
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void AddRawKeyValue(WebROCollection form, StringBuilder key, StringBuilder value)
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{
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string decodedKey = WebUtility.UrlDecode(key.ToString());
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form.Add(decodedKey,
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WebUtility.UrlDecode(value.ToString()));
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key.Length = 0;
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value.Length = 0;
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}
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Dictionary<string, HttpPostedFile> files;
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class WebROCollection : QueryParamCollection
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{
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public override string ToString()
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{
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StringBuilder result = new StringBuilder();
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foreach (var pair in this)
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{
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if (result.Length > 0)
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result.Append('&');
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var key = pair.Name;
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if (key != null && key.Length > 0)
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{
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result.Append(key);
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result.Append('=');
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}
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result.Append(pair.Value);
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}
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return result.ToString();
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}
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}
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public sealed class HttpPostedFile
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{
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string name;
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string content_type;
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Stream stream;
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class ReadSubStream : Stream
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{
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Stream s;
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long offset;
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long end;
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long position;
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public ReadSubStream(Stream s, long offset, long length)
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{
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this.s = s;
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this.offset = offset;
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this.end = offset + length;
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position = offset;
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}
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public override void Flush()
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{
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}
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public override int Read(byte[] buffer, int dest_offset, int count)
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{
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if (buffer == null)
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throw new ArgumentNullException("buffer");
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if (dest_offset < 0)
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throw new ArgumentOutOfRangeException("dest_offset", "< 0");
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if (count < 0)
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throw new ArgumentOutOfRangeException("count", "< 0");
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int len = buffer.Length;
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if (dest_offset > len)
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throw new ArgumentException("destination offset is beyond array size");
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// reordered to avoid possible integer overflow
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if (dest_offset > len - count)
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throw new ArgumentException("Reading would overrun buffer");
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if (count > end - position)
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count = (int)(end - position);
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if (count <= 0)
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return 0;
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s.Position = position;
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int result = s.Read(buffer, dest_offset, count);
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if (result > 0)
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position += result;
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else
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position = end;
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return result;
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}
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public override int ReadByte()
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{
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if (position >= end)
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return -1;
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s.Position = position;
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int result = s.ReadByte();
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if (result < 0)
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position = end;
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else
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position++;
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return result;
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}
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public override long Seek(long d, SeekOrigin origin)
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{
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long real;
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switch (origin)
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{
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case SeekOrigin.Begin:
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real = offset + d;
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break;
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case SeekOrigin.End:
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real = end + d;
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break;
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case SeekOrigin.Current:
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real = position + d;
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break;
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default:
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throw new ArgumentException();
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}
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long virt = real - offset;
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if (virt < 0 || virt > Length)
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throw new ArgumentException();
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position = s.Seek(real, SeekOrigin.Begin);
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return position;
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}
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public override void SetLength(long value)
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{
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throw new NotSupportedException();
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}
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public override void Write(byte[] buffer, int offset, int count)
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{
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throw new NotSupportedException();
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}
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public override bool CanRead
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{
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get { return true; }
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}
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public override bool CanSeek
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{
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get { return true; }
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}
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public override bool CanWrite
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{
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get { return false; }
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}
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public override long Length
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{
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get { return end - offset; }
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}
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public override long Position
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{
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get
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{
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return position - offset;
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}
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set
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{
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if (value > Length)
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throw new ArgumentOutOfRangeException();
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position = Seek(value, SeekOrigin.Begin);
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}
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}
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}
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internal HttpPostedFile(string name, string content_type, Stream base_stream, long offset, long length)
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{
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this.name = name;
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this.content_type = content_type;
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this.stream = new ReadSubStream(base_stream, offset, length);
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}
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public string ContentType
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{
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get
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{
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return content_type;
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}
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}
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public int ContentLength
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{
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get
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{
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return (int)stream.Length;
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}
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}
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public string FileName
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{
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get
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{
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return name;
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}
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}
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public Stream InputStream
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{
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get
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{
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return stream;
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}
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}
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}
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class Helpers
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{
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public static readonly CultureInfo InvariantCulture = CultureInfo.InvariantCulture;
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}
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internal sealed class StrUtils
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{
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public static bool StartsWith(string str1, string str2, bool ignore_case)
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{
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if (string.IsNullOrEmpty(str1))
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{
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return false;
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}
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var comparison = ignore_case ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal;
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return str1.IndexOf(str2, comparison) == 0;
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}
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public static bool EndsWith(string str1, string str2, bool ignore_case)
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{
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int l2 = str2.Length;
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if (l2 == 0)
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return true;
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int l1 = str1.Length;
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if (l2 > l1)
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return false;
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var comparison = ignore_case ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal;
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return str1.IndexOf(str2, comparison) == str1.Length - str2.Length - 1;
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}
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}
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class HttpMultipart
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{
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public class Element
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{
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public string ContentType;
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public string Name;
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public string Filename;
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public Encoding Encoding;
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public long Start;
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public long Length;
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public override string ToString()
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{
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return "ContentType " + ContentType + ", Name " + Name + ", Filename " + Filename + ", Start " +
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Start.ToString() + ", Length " + Length.ToString();
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}
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}
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Stream data;
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string boundary;
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byte[] boundary_bytes;
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byte[] buffer;
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bool at_eof;
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Encoding encoding;
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StringBuilder sb;
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const byte HYPHEN = (byte)'-', LF = (byte)'\n', CR = (byte)'\r';
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// See RFC 2046
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// In the case of multipart entities, in which one or more different
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// sets of data are combined in a single body, a "multipart" media type
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// field must appear in the entity's header. The body must then contain
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// one or more body parts, each preceded by a boundary delimiter line,
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// and the last one followed by a closing boundary delimiter line.
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// After its boundary delimiter line, each body part then consists of a
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// header area, a blank line, and a body area. Thus a body part is
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// similar to an RFC 822 message in syntax, but different in meaning.
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public HttpMultipart(Stream data, string b, Encoding encoding)
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{
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this.data = data;
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//DB: 30/01/11: cannot set or read the Position in HttpListener in Win.NET
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//var ms = new MemoryStream(32 * 1024);
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//data.CopyTo(ms);
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//this.data = ms;
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boundary = b;
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boundary_bytes = encoding.GetBytes(b);
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buffer = new byte[boundary_bytes.Length + 2]; // CRLF or '--'
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this.encoding = encoding;
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sb = new StringBuilder();
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}
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string ReadLine()
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{
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// CRLF or LF are ok as line endings.
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bool got_cr = false;
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int b = 0;
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sb.Length = 0;
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while (true)
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{
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b = data.ReadByte();
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if (b == -1)
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{
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return null;
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}
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if (b == LF)
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{
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break;
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}
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got_cr = b == CR;
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sb.Append((char)b);
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}
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if (got_cr)
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sb.Length--;
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return sb.ToString();
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}
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static string GetContentDispositionAttribute(string l, string name)
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{
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int idx = l.IndexOf(name + "=\"");
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if (idx < 0)
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return null;
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int begin = idx + name.Length + "=\"".Length;
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int end = l.IndexOf('"', begin);
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if (end < 0)
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return null;
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if (begin == end)
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return "";
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return l.Substring(begin, end - begin);
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}
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string GetContentDispositionAttributeWithEncoding(string l, string name)
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{
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int idx = l.IndexOf(name + "=\"");
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if (idx < 0)
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return null;
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int begin = idx + name.Length + "=\"".Length;
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int end = l.IndexOf('"', begin);
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if (end < 0)
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return null;
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if (begin == end)
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return "";
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string temp = l.Substring(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);
|
|
}
|
|
|
|
bool ReadBoundary()
|
|
{
|
|
try
|
|
{
|
|
string line = ReadLine();
|
|
while (line == "")
|
|
line = ReadLine();
|
|
if (line[0] != '-' || line[1] != '-')
|
|
return false;
|
|
|
|
if (!StrUtils.EndsWith(line, boundary, false))
|
|
return true;
|
|
}
|
|
catch
|
|
{
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
string ReadHeaders()
|
|
{
|
|
string s = ReadLine();
|
|
if (s == "")
|
|
return null;
|
|
|
|
return s;
|
|
}
|
|
|
|
bool CompareBytes(byte[] orig, byte[] other)
|
|
{
|
|
for (int i = orig.Length - 1; i >= 0; i--)
|
|
if (orig[i] != other[i])
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
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(boundary_bytes, 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] == '-')
|
|
{
|
|
at_eof = 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;
|
|
}
|
|
|
|
public Element ReadNextElement()
|
|
{
|
|
if (at_eof || ReadBoundary())
|
|
return null;
|
|
|
|
Element elem = new Element();
|
|
string header;
|
|
while ((header = ReadHeaders()) != null)
|
|
{
|
|
if (StrUtils.StartsWith(header, "Content-Disposition:", true))
|
|
{
|
|
elem.Name = GetContentDispositionAttribute(header, "name");
|
|
elem.Filename = StripPath(GetContentDispositionAttributeWithEncoding(header, "filename"));
|
|
}
|
|
else if (StrUtils.StartsWith(header, "Content-Type:", true))
|
|
{
|
|
elem.ContentType = header.Substring("Content-Type:".Length).Trim();
|
|
elem.Encoding = GetEncoding(elem.ContentType);
|
|
}
|
|
}
|
|
|
|
long start = 0;
|
|
start = data.Position;
|
|
elem.Start = start;
|
|
long pos = MoveToNextBoundary();
|
|
if (pos == -1)
|
|
return null;
|
|
|
|
elem.Length = pos - start;
|
|
return elem;
|
|
}
|
|
|
|
static string StripPath(string path)
|
|
{
|
|
if (path == null || path.Length == 0)
|
|
return path;
|
|
|
|
if (path.IndexOf(":\\") != 1 && !path.StartsWith("\\\\"))
|
|
return path;
|
|
return path.Substring(path.LastIndexOf('\\') + 1);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|