boost::tribool& RequestParser::consume(Request& req, Buffer::iterator it)
{
static boost::tribool False(false);
static boost::tribool True(true);
static boost::tribool Indeterminate(boost::indeterminate);
const char input = *it;
if (++requestSize_ > MAX_REQUEST_HEADER_SIZE)
return False;
switch (httpState_)
{
case method_start:
if (input == '\r')
{
/*
* allow a new line before a request -- this seems to be
* accepted practice when dealing with multiple requests
* in one connection, separated by a CRLF.
*/
httpState_ = expecting_newline_0;
return Indeterminate;
} else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
httpState_ = method;
consumeToString(req.method, MAX_METHOD_SIZE);
consumeChar(it);
return Indeterminate;
}
case expecting_newline_0:
if (input == '\n')
{
httpState_ = method_start;
return Indeterminate;
}
else
{
return False;
}
case method:
if (input == ' ')
{
consumeComplete(it);
httpState_ = uri_start;
return Indeterminate;
}
else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
if (consumeChar(it))
return Indeterminate;
else
return False;
}
case uri_start:
if (is_ctl(input))
{
return False;
}
else
{
httpState_ = uri;
consumeToString(req.uri, MAX_URI_SIZE);
consumeChar(it);
return Indeterminate;
}
case uri:
if (input == ' ')
{
consumeComplete(it);
httpState_ = http_version_h;
return Indeterminate;
}
else if (is_ctl(input))
{
return False;
}
else
{
if (consumeChar(it))
return Indeterminate;
else
return False;
}
case http_version_h:
if (input == 'H')
{
httpState_ = http_version_t_1;
return Indeterminate;
}
else
{
return False;
}
case http_version_t_1:
if (input == 'T')
{
httpState_ = http_version_t_2;
return Indeterminate;
}
else
{
return False;
}
case http_version_t_2:
if (input == 'T')
{
httpState_ = http_version_p;
return Indeterminate;
}
else
{
return False;
}
case http_version_p:
if (input == 'P')
{
httpState_ = http_version_slash;
return Indeterminate;
}
else
{
return False;
}
case http_version_slash:
if (input == '/')
{
req.http_version_major = 0;
req.http_version_minor = 0;
httpState_ = http_version_major_start;
return Indeterminate;
}
else
{
return False;
}
case http_version_major_start:
if (is_digit(input))
{
req.http_version_major = req.http_version_major * 10 + input - '0';
httpState_ = http_version_major;
return Indeterminate;
}
else
{
return False;
}
case http_version_major:
if (input == '.')
{
httpState_ = http_version_minor_start;
return Indeterminate;
}
else if (is_digit(input))
{
req.http_version_major = req.http_version_major * 10 + input - '0';
return Indeterminate;
}
else
{
return False;
}
case http_version_minor_start:
if (is_digit(input))
{
req.http_version_minor = req.http_version_minor * 10 + input - '0';
httpState_ = http_version_minor;
return Indeterminate;
}
else
{
return False;
}
case http_version_minor:
if (input == '\r')
{
httpState_ = expecting_newline_1;
return Indeterminate;
}
else if (is_digit(input))
{
req.http_version_minor = req.http_version_minor * 10 + input - '0';
return Indeterminate;
}
else
{
return False;
}
case expecting_newline_1:
if (input == '\n')
{
httpState_ = header_line_start;
return Indeterminate;
}
else
{
return False;
}
case header_line_start:
if (input == '\r')
{
httpState_ = expecting_newline_3;
return Indeterminate;
}
else if ((input == ' ' || input == '\t') && haveHeader_)
{
// continuation of previous header
httpState_ = header_lws;
return Indeterminate;
}
else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
req.headers.push_back(Request::Header());
haveHeader_ = true;
consumeToString(req.headers.back().name, MAX_FIELD_NAME_SIZE);
consumeChar(it);
httpState_ = header_name;
return Indeterminate;
}
case header_lws:
if (input == '\r')
{
httpState_ = expecting_newline_2;
return Indeterminate;
}
else if (input == ' ' || input == '\t')
{
return Indeterminate;
}
else if (is_ctl(input))
{
return False;
}
else
{
httpState_ = header_value;
consumeChar(it);
return Indeterminate;
}
case header_name:
if (input == ':')
{
consumeComplete(it);
httpState_ = space_before_header_value;
return Indeterminate;
}
else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
if (consumeChar(it))
return Indeterminate;
else
return False;
}
case space_before_header_value:
if (input == ' ')
{
consumeToString(req.headers.back().value, MAX_FIELD_VALUE_SIZE);
httpState_ = header_value;
return Indeterminate;
}
else
{
consumeToString(req.headers.back().value, MAX_FIELD_VALUE_SIZE);
httpState_ = header_value;
/* fall through */
}
case header_value:
if (input == '\r')
{
consumeComplete(it);
httpState_ = expecting_newline_2;
return Indeterminate;
}
else if (is_ctl(input))
{
return False;
}
else
{
if (consumeChar(it))
return Indeterminate;
else
return False;
}
case expecting_newline_2:
if (input == '\n')
{
httpState_ = header_line_start;
return Indeterminate;
}
else
{
return False;
}
case expecting_newline_3:
if (input == '\n')
return True;
else
return False;
default:
return False;
}
}
boost::tribool& RequestParser::consume(Request& req, char input)
{
static boost::tribool False(false);
static boost::tribool True(true);
static boost::tribool Indeterminate(boost::indeterminate);
if (++requestSize_ > MAX_REQUEST_HEADER_SIZE)
return False;
switch (httpState_)
{
case method_start:
if (input == '\r')
{
/*
* allow a new line before a request -- this seems to be
* accepted practice when dealing with multiple requests
* in one connection, separated by a CRLF.
*/
httpState_ = expecting_newline_0;
return Indeterminate;
} else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
httpState_ = method;
consumeToString(req.method, MAX_METHOD_SIZE);
consumeChar(input);
return Indeterminate;
}
case expecting_newline_0:
if (input == '\n')
{
httpState_ = method_start;
return Indeterminate;
}
else
{
return False;
}
case method:
if (input == ' ')
{
consumeComplete();
httpState_ = uri_start;
return Indeterminate;
}
else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
if (consumeChar(input))
return Indeterminate;
else
return False;
}
case uri_start:
if (is_ctl(input))
{
return False;
}
else
{
httpState_ = uri;
consumeToString(req.uri, MAX_URI_SIZE);
consumeChar(input);
return Indeterminate;
}
case uri:
if (input == ' ')
{
consumeComplete();
httpState_ = http_version_h;
return Indeterminate;
}
else if (is_ctl(input))
{
return False;
}
else
{
if (consumeChar(input))
return Indeterminate;
else
return False;
}
case http_version_h:
if (input == 'H')
{
httpState_ = http_version_t_1;
return Indeterminate;
}
else
{
return False;
}
case http_version_t_1:
if (input == 'T')
{
httpState_ = http_version_t_2;
return Indeterminate;
}
else
{
return False;
}
case http_version_t_2:
if (input == 'T')
{
httpState_ = http_version_p;
return Indeterminate;
}
else
{
return False;
}
case http_version_p:
if (input == 'P')
{
httpState_ = http_version_slash;
return Indeterminate;
}
else
{
return False;
}
case http_version_slash:
if (input == '/')
{
req.http_version_major = 0;
req.http_version_minor = 0;
httpState_ = http_version_major_start;
return Indeterminate;
}
else
{
return False;
}
case http_version_major_start:
if (is_digit(input))
{
req.http_version_major = req.http_version_major * 10 + input - '0';
httpState_ = http_version_major;
return Indeterminate;
}
else
{
return False;
}
case http_version_major:
if (input == '.')
{
httpState_ = http_version_minor_start;
return Indeterminate;
}
else if (is_digit(input))
{
req.http_version_major = req.http_version_major * 10 + input - '0';
return Indeterminate;
}
else
{
return False;
}
case http_version_minor_start:
if (is_digit(input))
{
req.http_version_minor = req.http_version_minor * 10 + input - '0';
httpState_ = http_version_minor;
return Indeterminate;
}
else
{
return False;
}
case http_version_minor:
if (input == '\r')
{
httpState_ = expecting_newline_1;
return Indeterminate;
}
else if (is_digit(input))
{
req.http_version_minor = req.http_version_minor * 10 + input - '0';
return Indeterminate;
}
else
{
return False;
}
case expecting_newline_1:
if (input == '\n')
{
httpState_ = header_line_start;
return Indeterminate;
}
else
{
return False;
}
case header_line_start:
if (input == '\r')
{
httpState_ = expecting_newline_3;
return Indeterminate;
}
else if (!req.headerMap.empty() && (input == ' ' || input == '\t'))
{
// continuation of previous header
httpState_ = header_lws;
return Indeterminate;
}
else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
consumeToString(headerName_, MAX_FIELD_NAME_SIZE);
consumeChar(input);
httpState_ = header_name;
return Indeterminate;
}
case header_lws:
if (input == '\r')
{
httpState_ = expecting_newline_2;
return Indeterminate;
}
else if (input == ' ' || input == '\t')
{
return Indeterminate;
}
else if (is_ctl(input))
{
return False;
}
else
{
httpState_ = header_value;
headerValue_.push_back(input);
return Indeterminate;
}
case header_name:
if (input == ':')
{
consumeComplete();
httpState_ = space_before_header_value;
return Indeterminate;
}
else if (!is_char(input) || is_ctl(input) || is_tspecial(input))
{
return False;
}
else
{
if (consumeChar(input))
return Indeterminate;
else
return False;
}
case space_before_header_value:
if (input == ' ')
{
consumeToString(headerValue_, MAX_FIELD_VALUE_SIZE);
httpState_ = header_value;
return Indeterminate;
}
else
{
consumeToString(headerValue_, MAX_FIELD_VALUE_SIZE);
httpState_ = header_value;
}
case header_value:
if (input == '\r')
{
consumeComplete();
if (req.headerMap.find(headerName_) != req.headerMap.end()) {
req.headerMap[headerName_] += ',' + headerValue_;
} else {
Request::HeaderMap::iterator i
= req.headerMap.insert(std::make_pair(headerName_, headerValue_))
.first;
req.headerOrder.push_back(i);
}
httpState_ = expecting_newline_2;
return Indeterminate;
}
else if (is_ctl(input))
{
return False;
}
else
{
if (consumeChar(input))
return Indeterminate;
else
return False;
}
case expecting_newline_2:
if (input == '\n')
{
httpState_ = header_line_start;
return Indeterminate;
}
else
{
return False;
}
case expecting_newline_3:
if (input == '\n')
return True;
else
return False;
default:
return False;
}
}
