long GetRangeLen(ByteRange range, Stream stream)
{
if (!stream.CanSeek)
{
return(-1);
}
long length = stream.Length;
if (range.Last > stream.Length)
{
return(-1);
}
if (range.First > stream.Length)
{
return(-1);
}
if (range.Last == -1)
{
return(stream.Length - range.First);
}
if (range.First == -1)
{
return(range.Last);
}
return((range.Last - range.First) + 1);
}
internal void ProcessLine(string line)
{
switch(state)
{
case ProcessingState.RequestLine:
{
string[] protocol = line.Split(' ');
if(protocol.Length != 3)
{
RequestError("400", "Invalid protocol string");
return;
}
switch(protocol[0])
{
case "GET":
case "POST":
case "HEAD":
method = protocol[0];
break;
case "PUT":
case "DELETE":
case "OPTIONS":
case "TRACE":
default:
RequestError("501", StatusCodes.GetDescription("501"));
return;
}
if(protocol[1].Length > 2500)
{
RequestError("414", StatusCodes.GetDescription("414"));
return;
}
requestUri = protocol[1];
if(!protocol[2].StartsWith("HTTP/") || !(protocol[2].Length > "HTTP/".Length))
{
RequestError("400", "Invalid protocol string");
return;
}
httpVersion = protocol[2].Substring("HTTP/".Length);
date = DateTime.Now;
connMode = httpVersion == "1.0" ? ConnectionMode.Close : ConnectionMode.KeepAlive;
state = ProcessingState.Headers;
break;
}
case ProcessingState.Headers:
{
if(headers.Count > maxHeaderLines)
{
RequestError("400", "Maximum header line count exceeded");
return;
}
if(line.Length == 0)
{
PostProcessHeaders();
return;
}
int colonIndex = line.IndexOf(":");
if(colonIndex <= 1)
return;
string val = line.Substring(colonIndex + 1).Trim();
string name = line.Substring(0, colonIndex);
try
{
headers.Add(name, val);
}
catch
{
}
switch(name.ToLower(CultureInfo.InvariantCulture))
{
case "host":
host = val;
break;
case "authorization":
{
if(val.Length < 6)
break;
string encoded = val.Substring(6, val.Length - 6);
byte[] byteAuth;
try
{
byteAuth = Convert.FromBase64String(encoded);
}
catch(FormatException)
{
break;
}
string[] strings = Encoding.UTF8.GetString(byteAuth).Split(':');
if(strings.Length != 2)
break;
username = strings[0];
password = strings[1];
break;
}
case "content-type":
contentType = val;
break;
case "content-length":
try
{
contentLength = long.Parse(val, NumberStyles.Integer, CultureInfo.InvariantCulture);
}
catch(FormatException)
{
}
if(contentLength > client.server.MaxPostLength)
{
RequestError("413", StatusCodes.GetDescription("413"));
return;
}
else if(contentLength < 0)
{
RequestError("400", StatusCodes.GetDescription("400"));
return;
}
break;
case "accept":
accept = val;
break;
case "accept-language":
acceptLanguage = val;
break;
case "user-agent":
userAgent = val;
break;
case "connection":
if(string.Compare(val, "close", true, CultureInfo.InvariantCulture) == 0)
connMode = ConnectionMode.Close;
else
connMode = ConnectionMode.KeepAlive;
break;
case "if-modified-since":
try
{
ifModifiedSince = ParseHttpTime(val);
}
catch(FormatException)
{
}
break;
case "if-unmodified-since":
try
{
ifUnmodifiedSince = ParseHttpTime(val);
}
catch(FormatException)
{
}
break;
case "range":
try
{
string[] rangeStrings = val.Split(',');
this.ranges = new ByteRange[rangeStrings.Length];
for(int i = 0; i < rangeStrings.Length; i++)
ranges[i] = new ByteRange(rangeStrings[i]);
}
catch(FormatException)
{
this.ranges = null;
}
break;
default:
break;
}
break;
}
}
}
internal void ProcessLine(string line)
{
switch (state)
{
case ProcessingState.RequestLine:
{
string[] protocol = line.Split(' ');
if (protocol.Length != 3)
{
RequestError("400", "Invalid protocol string");
return;
}
switch (protocol[0])
{
case "GET":
case "POST":
case "HEAD":
method = protocol[0];
break;
case "PUT":
case "DELETE":
case "OPTIONS":
case "TRACE":
default:
RequestError("501", StatusCodes.GetDescription("501"));
return;
}
if (protocol[1].Length > 2500)
{
RequestError("414", StatusCodes.GetDescription("414"));
return;
}
requestUri = protocol[1];
if (!protocol[2].StartsWith("HTTP/") || !(protocol[2].Length > "HTTP/".Length))
{
RequestError("400", "Invalid protocol string");
return;
}
httpVersion = protocol[2].Substring("HTTP/".Length);
date = DateTime.Now;
connMode = httpVersion == "1.0" ? ConnectionMode.Close : ConnectionMode.KeepAlive;
state = ProcessingState.Headers;
break;
}
case ProcessingState.Headers:
{
if (headers.Count > maxHeaderLines)
{
RequestError("400", "Maximum header line count exceeded");
return;
}
if (line.Length == 0)
{
PostProcessHeaders();
return;
}
int colonIndex = line.IndexOf(":");
if (colonIndex <= 1)
{
return;
}
string val = line.Substring(colonIndex + 1).Trim();
string name = line.Substring(0, colonIndex);
try
{
headers.Add(name, val);
}
catch
{
}
switch (name.ToLower(CultureInfo.InvariantCulture))
{
case "host":
host = val;
break;
case "authorization":
{
if (val.Length < 6)
{
break;
}
string encoded = val.Substring(6, val.Length - 6);
byte[] byteAuth;
try
{
byteAuth = Convert.FromBase64String(encoded);
}
catch (FormatException)
{
break;
}
string[] strings = Encoding.UTF8.GetString(byteAuth).Split(':');
if (strings.Length != 2)
{
break;
}
username = strings[0];
password = strings[1];
break;
}
case "content-type":
contentType = val;
break;
case "content-length":
try
{
contentLength = long.Parse(val, NumberStyles.Integer, CultureInfo.InvariantCulture);
}
catch (FormatException)
{
}
if (contentLength > client.server.MaxPostLength)
{
RequestError("413", StatusCodes.GetDescription("413"));
return;
}
else if (contentLength < 0)
{
RequestError("400", StatusCodes.GetDescription("400"));
return;
}
break;
case "accept":
accept = val;
break;
case "accept-language":
acceptLanguage = val;
break;
case "user-agent":
userAgent = val;
break;
case "connection":
if (string.Compare(val, "close", true, CultureInfo.InvariantCulture) == 0)
{
connMode = ConnectionMode.Close;
}
else
{
connMode = ConnectionMode.KeepAlive;
}
break;
case "if-modified-since":
try
{
ifModifiedSince = ParseHttpTime(val);
}
catch (FormatException)
{
}
break;
case "if-unmodified-since":
try
{
ifUnmodifiedSince = ParseHttpTime(val);
}
catch (FormatException)
{
}
break;
case "range":
try
{
string[] rangeStrings = val.Split(',');
this.ranges = new ByteRange[rangeStrings.Length];
for (int i = 0; i < rangeStrings.Length; i++)
{
ranges[i] = new ByteRange(rangeStrings[i]);
}
}
catch (FormatException)
{
this.ranges = null;
}
break;
default:
break;
}
break;
}
}
}