/// <summary>Parses the request line sent from the client</summary>
/// <param name="requestLine">String containing the received request line</param>
private void parseRequestLine(string requestLine)
{
// The RFC doesn't say that the request line must not contain any additional
// spaces, so in the we will assume the first space terminates the method and the
// last space terminates the URI.
int uriDelimiterIndex = requestLine.IndexOf(' ');
if (uriDelimiterIndex == -1)
{
throw Errors.BadRequest("Request-line is missing an URI");
}
// If there's only one space character, then the request is missing the version
// of the HTTP protocol used.
int versionDelimiterIndex = requestLine.LastIndexOf(' ');
if (versionDelimiterIndex == uriDelimiterIndex)
{
throw Errors.BadRequest("Request-line does not specify HTTP version");
}
// Request seems to be at least be in the right layout. Extract the individual
// components and pass them to the request container builder (validation of
// the actual settings takes place once we have a complete request).
requestBuilder.Method = requestLine.Substring(0, uriDelimiterIndex);
requestBuilder.Uri = requestLine.Substring(
uriDelimiterIndex + 1, versionDelimiterIndex - uriDelimiterIndex - 1
);
requestBuilder.Version = requestLine.Substring(versionDelimiterIndex + 1);
// We expect HTTP/1.* to stay compatible with the general format of the request.
// Any other version of the protocol may include major changes to the request
// format, thus we only accept HTTP/1.*.
if (!requestBuilder.Version.StartsWith("HTTP/1."))
{
throw Errors.UnsupportedProtocolVersion();
}
}
