public ForChunkedEncoding(bool keepAlive, FrameRequestHeaders headers, Frame context)
: base(context)
{
RequestKeepAlive = keepAlive;
_requestHeaders = headers;
}
public bool TakeMessageHeaders(SocketInput input, FrameRequestHeaders requestHeaders)
{
var scan = input.ConsumingStart();
var consumed = scan;
try
{
int chFirst;
int chSecond;
while (!scan.IsEnd)
{
var beginName = scan;
if (scan.Seek(ref _vectorColons, ref _vectorCRs) == -1)
{
return(false);
}
var endName = scan;
chFirst = scan.Take();
var beginValue = scan;
chSecond = scan.Take();
if (chFirst == -1 || chSecond == -1)
{
return(false);
}
if (chFirst == '\r')
{
if (chSecond == '\n')
{
consumed = scan;
return(true);
}
ReportCorruptedHttpRequest(new BadHttpRequestException("Headers corrupted, invalid header sequence."));
// Headers corrupted, parsing headers is complete
return(true);
}
while (
chSecond == ' ' ||
chSecond == '\t' ||
chSecond == '\r' ||
chSecond == '\n')
{
if (chSecond == '\r')
{
var scanAhead = scan;
var chAhead = scanAhead.Take();
if (chAhead == -1)
{
return(false);
}
else if (chAhead == '\n')
{
chAhead = scanAhead.Take();
if (chAhead == -1)
{
return(false);
}
else if (chAhead != ' ' && chAhead != '\t')
{
// If the "\r\n" isn't part of "linear whitespace",
// then this header has no value.
break;
}
}
}
beginValue = scan;
chSecond = scan.Take();
if (chSecond == -1)
{
return(false);
}
}
scan = beginValue;
var wrapping = false;
while (!scan.IsEnd)
{
if (scan.Seek(ref _vectorCRs) == -1)
{
// no "\r" in sight, burn used bytes and go back to await more data
return(false);
}
var endValue = scan;
chFirst = scan.Take(); // expecting: \r
chSecond = scan.Take(); // expecting: \n
if (chSecond == -1)
{
return(false);
}
else if (chSecond != '\n')
{
// "\r" was all by itself, move just after it and try again
scan = endValue;
scan.Take();
continue;
}
var chThird = scan.Peek();
if (chThird == -1)
{
return(false);
}
else if (chThird == ' ' || chThird == '\t')
{
// special case, "\r\n " or "\r\n\t".
// this is considered wrapping"linear whitespace" and is actually part of the header value
// continue past this for the next
wrapping = true;
continue;
}
var name = beginName.GetArraySegment(endName);
var value = beginValue.GetAsciiString(endValue);
if (wrapping)
{
value = value.Replace("\r\n", " ");
}
consumed = scan;
requestHeaders.Append(name.Array, name.Offset, name.Count, value);
break;
}
}
return(false);
}
finally
{
input.ConsumingComplete(consumed, scan);
}
}