private bool BinaryHeaderReceived(byte[] Data, int Offset, int NrRead)
{
string Header = null;
int i, c;
byte b;
c = Offset + NrRead;
for (i = Offset; i < c; i++)
{
b = Data[i];
if (this.b1 == CR && this.b2 == LF && this.b3 == CR && b == LF) // RFC 2616, §2.2
{
if (this.headerStream is null)
{
Header = InternetContent.ISO_8859_1.GetString(Data, Offset, i - Offset - 3);
}
else
{
this.headerStream.Write(Data, Offset, i - Offset - 3);
Header = InternetContent.ISO_8859_1.GetString(this.headerStream.ToArray(), 0, (int)this.headerStream.Position);
this.headerStream = null;
}
}
else if (this.b3 == LF && b == LF) // RFC 2616, §19.3
{
if (this.headerStream is null)
{
Header = InternetContent.ISO_8859_1.GetString(Data, Offset, i - Offset - 1);
}
else
{
this.headerStream.Write(Data, Offset, i - Offset - 1);
Header = InternetContent.ISO_8859_1.GetString(this.headerStream.ToArray(), 0, (int)this.headerStream.Position);
this.headerStream = null;
}
}
else
{
this.b1 = this.b2;
this.b2 = this.b3;
this.b3 = b;
continue;
}
this.ReceiveText(Header);
this.header = new HttpRequestHeader(Header, this.encrypted ? "https" : "http");
this.lastResource = this.header.Resource;
if (this.header.HttpVersion < 1)
{
this.SendResponse(null, 505, "HTTP Version Not Supported", true);
return(false);
}
else if (this.header.ContentLength != null && (this.header.ContentLength.ContentLength > MaxEntitySize))
{
this.SendResponse(null, 413, "Request Entity Too Large", true);
return(false);
}
else if (i + 1 < NrRead)
{
return(this.BinaryDataReceived(Data, i + 1, NrRead - i - 1));
}
else if (!this.header.HasMessageBody)
{
return(this.RequestReceived());
}
else
{
return(true);
}
}
if (this.headerStream is null)
{
this.headerStream = new MemoryStream();
}
this.headerStream.Write(Data, Offset, NrRead);
if (this.headerStream.Position < MaxHeaderSize)
{
return(true);
}
else
{
if (this.HasSniffers)
{
int d = (int)this.headerStream.Position;
byte[] Data2 = new byte[d];
this.headerStream.Position = 0;
this.headerStream.Read(Data2, 0, d);
this.ReceiveBinary(Data2);
}
this.SendResponse(null, 431, "Request Header Fields Too Large", true);
return(false);
}
}
/// <summary>
/// Executes a method on the resource. The default behaviour is to call the corresponding execution methods defined in the specialized
/// interfaces <see cref="IHttpGetMethod"/>, <see cref="IHttpPostMethod"/>, <see cref="IHttpPutMethod"/> and <see cref="IHttpDeleteMethod"/>
/// if they are defined for the resource.
/// </summary>
/// <param name="Server">HTTP Server</param>
/// <param name="Request">HTTP Request</param>
/// <param name="Response">HTTP Response</param>
/// <exception cref="HttpException">If an error occurred when processing the method.</exception>
public virtual void Execute(HttpServer Server, HttpRequest Request, HttpResponse Response)
{
HttpRequestHeader Header = Request.Header;
string Method = Request.Header.Method;
if (this.UserSessions)
{
HttpFieldCookie Cookie;
string HttpSessionID;
if ((Cookie = Request.Header.Cookie) is null || string.IsNullOrEmpty(HttpSessionID = Cookie["HttpSessionID"]))
{
HttpSessionID = System.Convert.ToBase64String(Hashes.ComputeSHA512Hash(Guid.NewGuid().ToByteArray()));
Response.SetCookie(new HTTP.Cookie("HttpSessionID", HttpSessionID, null, "/", null, false, true));
}
Request.Session = Server.GetSession(HttpSessionID);
}
switch (Method)
{
case "GET":
case "HEAD":
if (this.getRanges != null)
{
Response.SetHeader("Accept-Ranges", "bytes");
if (Header.Range != null)
{
ByteRangeInterval FirstInterval = Header.Range.FirstInterval;
if (FirstInterval is null)
{
throw new RangeNotSatisfiableException();
}
else
{
Response.OnlyHeader = Method == "HEAD";
Response.StatusCode = 206;
Response.StatusMessage = "Partial Content";
this.getRanges.GET(Request, Response, FirstInterval);
}
}
else
{
Response.OnlyHeader = Method == "HEAD";
if (this.get != null)
{
this.get.GET(Request, Response);
}
else
{
this.getRanges.GET(Request, Response, new ByteRangeInterval(0, null));
}
}
}
else if (this.get != null)
{
Response.OnlyHeader = Method == "HEAD";
this.get.GET(Request, Response);
}
else
{
throw new MethodNotAllowedException(this.allowedMethods);
}
break;
case "POST":
if (this.postRanges != null)
{
if (Header.ContentRange != null)
{
ContentByteRangeInterval Interval = Header.ContentRange.Interval;
if (Interval is null)
{
throw new RangeNotSatisfiableException();
}
else
{
this.postRanges.POST(Request, Response, Interval);
}
}
else
{
if (this.post != null)
{
this.post.POST(Request, Response);
}
else
{
long Total;
if (Header.ContentLength != null)
{
Total = Header.ContentLength.ContentLength;
}
else if (Request.DataStream != null)
{
Total = Request.DataStream.Position;
}
else
{
Total = 0;
}
this.postRanges.POST(Request, Response, new ContentByteRangeInterval(0, Total - 1, Total));
}
}
}
else if (this.post != null)
{
this.post.POST(Request, Response);
}
else
{
throw new MethodNotAllowedException(this.allowedMethods);
}
break;
case "PUT":
if (this.putRanges != null)
{
if (Header.ContentRange != null)
{
ContentByteRangeInterval Interval = Header.ContentRange.Interval;
if (Interval is null)
{
throw new RangeNotSatisfiableException();
}
else
{
this.putRanges.PUT(Request, Response, Interval);
}
}
else
{
if (this.put != null)
{
this.put.PUT(Request, Response);
}
else
{
long Total;
if (Header.ContentLength != null)
{
Total = Header.ContentLength.ContentLength;
}
else if (Request.DataStream != null)
{
Total = Request.DataStream.Position;
}
else
{
Total = 0;
}
this.putRanges.PUT(Request, Response, new ContentByteRangeInterval(0, Total - 1, Total));
}
}
}
else if (this.put != null)
{
this.put.PUT(Request, Response);
}
else
{
throw new MethodNotAllowedException(this.allowedMethods);
}
break;
case "DELETE":
if (this.delete is null)
{
throw new MethodNotAllowedException(this.allowedMethods);
}
else
{
this.delete.DELETE(Request, Response);
}
break;
case "OPTIONS":
if (this.options is null)
{
throw new MethodNotAllowedException(this.allowedMethods);
}
else
{
this.options.OPTIONS(Request, Response);
}
break;
case "TRACE":
if (this.trace is null)
{
throw new MethodNotAllowedException(this.allowedMethods);
}
else
{
this.trace.TRACE(Request, Response);
}
break;
default:
throw new MethodNotAllowedException(this.allowedMethods);
}
if (this.Synchronous)
{
Response.SendResponse();
Response.Dispose();
}
}
private Stream CheckAcceptable(HttpRequest Request, HttpResponse Response, ref string ContentType, out bool Dynamic,
string FullPath, string ResourceName)
{
HttpRequestHeader Header = Request.Header;
Dynamic = false;
if (Header.Accept != null)
{
bool Acceptable = Header.Accept.IsAcceptable(ContentType, out double Quality, out ContentTypeAcceptance TypeAcceptance, null);
if ((!Acceptable || TypeAcceptance == ContentTypeAcceptance.Wildcard) && (this.allowTypeConversionFrom == null ||
(this.allowTypeConversionFrom.TryGetValue(ContentType, out bool Allowed) && Allowed)))
{
IContentConverter Converter = null;
string NewContentType = null;
foreach (AcceptRecord AcceptRecord in Header.Accept.Records)
{
NewContentType = AcceptRecord.Item;
if (NewContentType.EndsWith("/*"))
{
continue;
}
if (InternetContent.CanConvert(ContentType, NewContentType, out Converter))
{
Acceptable = true;
break;
}
}
if (Acceptable && Converter != null)
{
Stream f2 = null;
Stream f = File.OpenRead(FullPath);
bool Ok = false;
try
{
f2 = f.Length < HttpClientConnection.MaxInmemoryMessageSize ? (Stream) new MemoryStream() : new TemporaryFile();
if (Request.Session != null)
{
Request.Session["Request"] = Request;
Request.Session["Response"] = Response;
}
if (Converter.Convert(ContentType, f, FullPath, ResourceName, Request.Header.GetURL(false, false),
NewContentType, f2, Request.Session))
{
Dynamic = true;
}
ContentType = NewContentType;
Ok = true;
}
finally
{
if (f2 == null)
{
f.Dispose();
}
else if (!Ok)
{
f2.Dispose();
f.Dispose();
}
else
{
f.Dispose();
f = f2;
f2 = null;
f.Position = 0;
}
}
return(f);
}
}
if (!Acceptable)
{
throw new NotAcceptableException();
}
}
return(null);
}
/// <summary>
/// Executes the ranged GET method on the resource.
/// </summary>
/// <param name="Request">HTTP Request</param>
/// <param name="Response">HTTP Response</param>
/// <param name="FirstInterval">First byte range interval.</param>
/// <exception cref="HttpException">If an error occurred when processing the method.</exception>
public void GET(HttpRequest Request, HttpResponse Response, ByteRangeInterval FirstInterval)
{
string FullPath = this.GetFullPath(Request);
if (!File.Exists(FullPath))
{
throw new NotFoundException();
}
HttpRequestHeader Header = Request.Header;
DateTime LastModified = File.GetLastWriteTime(FullPath).ToUniversalTime();
DateTimeOffset? Limit;
CacheRec Rec;
if (Header.IfRange != null && (Limit = Header.IfRange.Timestamp).HasValue &&
!LessOrEqual(LastModified, Limit.Value.ToUniversalTime()))
{
Response.StatusCode = 200;
this.GET(Request, Response); // No ranged request.
return;
}
Rec = this.CheckCacheHeaders(FullPath, LastModified, Request);
string ContentType = InternetContent.GetContentType(Path.GetExtension(FullPath));
Stream f = CheckAcceptable(Request, Response, ref ContentType, out bool Dynamic, FullPath, Request.Header.Resource);
Rec.IsDynamic = Dynamic;
ReadProgress Progress = new ReadProgress()
{
Response = Response,
f = f ?? File.OpenRead(FullPath)
};
ByteRangeInterval Interval = FirstInterval;
Progress.TotalLength = Progress.f.Length;
long i = 0;
long j;
long First;
if (FirstInterval.First.HasValue)
{
First = FirstInterval.First.Value;
}
else
{
First = Progress.TotalLength - FirstInterval.Last.Value;
}
Progress.f.Position = First;
Progress.BytesLeft = Interval.GetIntervalLength(Progress.TotalLength);
Progress.Next = Interval.Next;
while (Interval != null)
{
j = Interval.GetIntervalLength(Progress.TotalLength);
if (j > i)
{
i = j;
}
Interval = Interval.Next;
}
Progress.BlockSize = (int)Math.Min(BufferSize, i);
Progress.Buffer = new byte[Progress.BlockSize];
if (FirstInterval.Next == null)
{
Progress.Boundary = null;
Progress.ContentType = null;
Response.ContentType = ContentType;
Response.ContentLength = FirstInterval.GetIntervalLength(Progress.f.Length);
Response.SetHeader("Content-Range", ContentByteRangeInterval.ContentRangeToString(First, First + Progress.BytesLeft - 1, Progress.TotalLength));
}
else
{
Progress.Boundary = Guid.NewGuid().ToString().Replace("-", string.Empty);
Progress.ContentType = ContentType;
Response.ContentType = "multipart/byteranges; boundary=" + Progress.Boundary;
// chunked transfer encoding will be used
}
if (!Rec.IsDynamic)
{
Response.SetHeader("ETag", Rec.ETag);
Response.SetHeader("Last-Modified", CommonTypes.EncodeRfc822(LastModified));
}
if (Response.OnlyHeader || Progress.BytesLeft == 0)
{
Response.SendResponse();
Progress.Dispose();
}
else
{
if (FirstInterval.Next != null)
{
Response.WriteLine();
Response.WriteLine("--" + Progress.Boundary);
Response.WriteLine("Content-Type: " + Progress.ContentType);
Response.WriteLine("Content-Range: " + ContentByteRangeInterval.ContentRangeToString(First, First + Progress.BytesLeft - 1, Progress.TotalLength));
Response.WriteLine();
}
Task T = Progress.BeginRead();
}
}
private Stream CheckAcceptable(HttpRequest Request, HttpResponse Response, ref string ContentType, out bool Dynamic,
string FullPath, string ResourceName)
{
HttpRequestHeader Header = Request.Header;
Dynamic = false;
if (Header.Accept != null)
{
bool Acceptable = Header.Accept.IsAcceptable(ContentType, out double Quality, out AcceptanceLevel TypeAcceptance, null);
if ((!Acceptable || TypeAcceptance == AcceptanceLevel.Wildcard) && (this.allowTypeConversionFrom is null ||
(this.allowTypeConversionFrom.TryGetValue(ContentType, out bool Allowed) && Allowed)))
{
IContentConverter Converter = null;
string NewContentType = null;
foreach (AcceptRecord AcceptRecord in Header.Accept.Records)
{
NewContentType = AcceptRecord.Item;
if (NewContentType.EndsWith("/*"))
{
NewContentType = null;
continue;
}
if (InternetContent.CanConvert(ContentType, NewContentType, out Converter))
{
Acceptable = true;
break;
}
}
if (Converter is null)
{
IContentConverter[] Converters = InternetContent.GetConverters(ContentType);
if (!(Converters is null))
{
string BestContentType = null;
double BestQuality = 0;
IContentConverter Best = null;
bool Found;
foreach (IContentConverter Converter2 in InternetContent.Converters)
{
Found = false;
foreach (string FromContentType in Converter2.FromContentTypes)
{
if (ContentType == FromContentType)
{
Found = true;
break;
}
}
if (!Found)
{
continue;
}
foreach (string ToContentType in Converter2.ToContentTypes)
{
if (Header.Accept.IsAcceptable(ToContentType, out double Quality2) && Quality > BestQuality)
{
BestContentType = ToContentType;
BestQuality = Quality;
Best = Converter2;
}
}
}
if (Best != null && (!Acceptable || BestQuality >= Quality))
{
Acceptable = true;
Converter = Best;
NewContentType = BestContentType;
}
}
}
if (Acceptable && Converter != null)
{
Stream f2 = null;
Stream f = File.Open(FullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
bool Ok = false;
try
{
f2 = f.Length < HttpClientConnection.MaxInmemoryMessageSize ? (Stream) new MemoryStream() : new TemporaryFile();
if (Request.Session != null)
{
Request.Session["Request"] = Request;
Request.Session["Response"] = Response;
}
List <string> Alternatives = null;
string[] Range = Converter.ToContentTypes;
foreach (AcceptRecord AcceptRecord in Header.Accept.Records)
{
if (AcceptRecord.Item.EndsWith("/*") || AcceptRecord.Item == NewContentType)
{
continue;
}
if (Array.IndexOf <string>(Range, AcceptRecord.Item) >= 0)
{
if (Alternatives is null)
{
Alternatives = new List <string>();
}
Alternatives.Add(AcceptRecord.Item);
}
}
if (Converter.Convert(ContentType, f, FullPath, ResourceName, Request.Header.GetURL(false, false),
ref NewContentType, f2, Request.Session, Alternatives?.ToArray()))
{
Dynamic = true;
}
ContentType = NewContentType;
Ok = true;
}
finally
{
if (f2 is null)
{
f.Dispose();
}
else if (!Ok)
{
f2.Dispose();
f.Dispose();
}
else
{
f.Dispose();
f = f2;
f.Position = 0;
}
}
return(f);
}
}
if (!Acceptable)
{
throw new NotAcceptableException();
}
}
return(null);
}
