public static HttpResponseMetadata Parse(byte[] buffer, int start)
{
// parse status line
var line = HttpStatusLine.Parse(buffer, start);
start += line.ByteCount;
// parse headers
var headers = HttpHeaderCollection.Parse(buffer, start);
var metadata = new HttpResponseMetadata(line, headers);
return(metadata);
}
public static HttpStatusLine Parse(byte[] buffer, int start)
{
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (start < 0 || start >= buffer.Length)
{
throw new ArgumentOutOfRangeException(nameof(start));
}
var crLfIndex = buffer.IndexOfSubarray(CoreHelper.CrLfBytes, start, -1);
if (crLfIndex == -1)
{
throw new BadHttpDataException("Could not parse status line");
}
// version
var indexOfSpaceAfterVersion = buffer.IndexOf(SPACE_BYTE, start);
if (indexOfSpaceAfterVersion == -1)
{
throw new BadHttpDataException("Could not parse status line");
}
var length = indexOfSpaceAfterVersion - start;
if (length == 0)
{
// version length is 0
throw new BadHttpDataException("Could not parse status line"); // todo1[ak] a lot of copy/paste
}
var version = buffer.ToAsciiString(start, length);
// advance
start = indexOfSpaceAfterVersion + 1; // skip ' '
// code
var indexOfSpaceAfterCode = buffer.IndexOf(SPACE_BYTE, start);
length = indexOfSpaceAfterCode - start;
if (length == 0)
{
// code length is 0
throw new BadHttpDataException("Could not parse status line");
}
var codeNumber = buffer.ToAsciiString(start, length).ToInt32();
var code = (HttpStatusCode)codeNumber;
// advance
start = indexOfSpaceAfterCode + 1; // skip ' '
// reason
length = crLfIndex - start;
if (length == 0)
{
// reason length is 0
throw new BadHttpDataException("Could not parse status line");
}
var reason = buffer.ToAsciiString(start, length);
if (reason[0] == ' ')
{
// reason must not start with space
throw new BadHttpDataException("Could not parse status line");
}
try
{
var line = new HttpStatusLine(version, code, reason);
return(line);
}
catch (ArgumentException ex)
{
throw new BadHttpDataException("Could not parse request line", ex);
}
}
public HttpResponseMetadata(HttpStatusLine line, HttpHeaderCollection headers)
{
this.Line = line ?? throw new ArgumentNullException(nameof(line));
this.Headers = headers ?? throw new ArgumentNullException(nameof(headers));
}
