internal HttpRequestLine(HttpSocket hs)
{
string line;
do
{
line = hs.ReadAsciiLine().Trim();
}while (line.Length == 0);
string[] items = line.Split(sp,
StringSplitOptions.RemoveEmptyEntries);
if (items.Length != 3)
{
throw new HttpProtocolBroken("Unrecognized request line '" +
line + "'");
}
RequestLine = line;
Method = items[0];
URI = items[1];
ProtocolVersion = ParserHelper.ParseProtocolVersion(items[2]);
}
internal HttpStatusLine(HttpSocket hs)
{
string line;
do
{
line = hs.ReadAsciiLine().Trim();
}while (line.Length == 0);
string[] items = line.Split(sp,
StringSplitOptions.RemoveEmptyEntries);
// Note: the status line has three items: the HTTP protocol
// version, the status code, and the reason phrase.
// Only the reason phrase may be empty.
if (items.Length < 2)
{
throw new HttpProtocolBroken("Unrecognized status line '" +
line + "'");
}
ProtocolVersion = ParserHelper.ParseProtocolVersion(
items[0]);
string code = items[1];
if (code.Length != 3 ||
!char.IsDigit(code[0])) // we only test the first character
{
throw new HttpProtocolBroken("Invalid status code '" +
code + "'");
}
//string Reason = rest of the string; // we don't need it
StatusCode = int.Parse(code);
StatusLine = line;
}
/// <summary>
/// Read and parse HTTP headers from a connected socket
/// </summary>
public HttpHeaders(HttpSocket source) : this()
{
StringBuilder sb = new StringBuilder(512);
while (true)
{
var line = source.ReadAsciiLine();
if (line.Length == 0)
{
break;
}
sb.Append(line);
sb.Append("\r\n"); // Note: if the header newline was
// incorrectly formatted (i.e. LF instead of CRLF),
// we correct it here. This is one point where our
// proxy is not fully transparent.
var iSplit = line.IndexOf(':');
if (iSplit <= 0)
{
throw new HttpProtocolBroken("No colon in HTTP header");
}
// Header names are case-insensitive, but only some header
// values are.
string HeaderName = line.Substring(0, iSplit).Trim().ToLower();
string HeaderValue = line.Substring(iSplit + 1).Trim();
if (IsHeaderValueCaseInsensitive(HeaderName))
{
HeaderValue = HeaderValue.ToLower();
}
string previous_value = null;
if (Headers.TryGetValue(HeaderName, out previous_value))
{
// Duplicate headers: concatenate them
// (RFC 2616, section 4.2)
// However, this should only occur if the value of that
// header is a comma-separated list. In the real world,
// it has been observed that headers with
// non-comma-separated values, such as Content-Length, *are*
// in some rare cases repeated, so we should not concatenate
// the values.
if (!HeaderName.Equals("content-length"))
{
Headers[HeaderName] = previous_value + "," + HeaderValue;
}
}
else
{
Headers[HeaderName] = HeaderValue;
}
}
HeadersInOrder = sb.ToString();
// Parse a subset of the header values.
// If headers are added, don't forget to update RemoveHeader
// as well.
Connection = ParseMultipleStringValues("connection");
ContentEncoding = ParseStringValue("content-encoding");
ContentLength = ParseIntValue("content-length");
Host = ParseStringValue("host");
ProxyConnection = ParseMultipleStringValues("proxy-connection");
Referer = ParseStringValue("referer");
TransferEncoding = ParseMultipleStringValues("transfer-encoding");
}