request.hpp
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/*
* Copyright (c) 2014, Peter Thorson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the WebSocket++ Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef HTTP_PARSER_REQUEST_IMPL_HPP
#define HTTP_PARSER_REQUEST_IMPL_HPP
#include <algorithm>
#include <sstream>
#include <string>
#include <websocketpp/http/parser.hpp>
namespace websocketpp {
namespace http {
namespace parser {
inline size_t request::consume(char const * buf, size_t len) {
size_t bytes_processed;
if (m_ready) {return 0;}
if (m_body_bytes_needed > 0) {
bytes_processed = process_body(buf,len);
if (body_ready()) {
m_ready = true;
}
return bytes_processed;
}
// copy new header bytes into buffer
m_buf->append(buf,len);
// Search for delimiter in buf. If found read until then. If not read all
std::string::iterator begin = m_buf->begin();
std::string::iterator end;
for (;;) {
// search for line delimiter
end = std::search(
begin,
m_buf->end(),
header_delimiter,
header_delimiter+sizeof(header_delimiter)-1
);
m_header_bytes += (end-begin+sizeof(header_delimiter));
if (m_header_bytes > max_header_size) {
// exceeded max header size
throw exception("Maximum header size exceeded.",
status_code::request_header_fields_too_large);
}
if (end == m_buf->end()) {
// we are out of bytes. Discard the processed bytes and copy the
// remaining unprecessed bytes to the beginning of the buffer
std::copy(begin,end,m_buf->begin());
m_buf->resize(static_cast<std::string::size_type>(end-begin));
m_header_bytes -= m_buf->size();
return len;
}
//the range [begin,end) now represents a line to be processed.
if (end-begin == 0) {
// we got a blank line
if (m_method.empty() || get_header("Host").empty()) {
throw exception("Incomplete Request",status_code::bad_request);
}
bytes_processed = (
len - static_cast<std::string::size_type>(m_buf->end()-end)
+ sizeof(header_delimiter) - 1
);
// frees memory used temporarily during request parsing
m_buf.reset();
// if this was not an upgrade request and has a content length
// continue capturing content-length bytes and expose them as a
// request body.
if (prepare_body()) {
bytes_processed += process_body(buf+bytes_processed,len-bytes_processed);
if (body_ready()) {
m_ready = true;
}
return bytes_processed;
} else {
m_ready = true;
// return number of bytes processed (starting bytes - bytes left)
return bytes_processed;
}
} else {
if (m_method.empty()) {
this->process(begin,end);
} else {
this->process_header(begin,end);
}
}
begin = end+(sizeof(header_delimiter)-1);
}
}
inline std::string request::raw() const {
// TODO: validation. Make sure all required fields have been set?
std::stringstream ret;
ret << m_method << " " << m_uri << " " << get_version() << "\r\n";
ret << raw_headers() << "\r\n" << m_body;
return ret.str();
}
inline std::string request::raw_head() const {
// TODO: validation. Make sure all required fields have been set?
std::stringstream ret;
ret << m_method << " " << m_uri << " " << get_version() << "\r\n";
ret << raw_headers() << "\r\n";
return ret.str();
}
inline void request::set_method(std::string const & method) {
if (std::find_if(method.begin(),method.end(),is_not_token_char) != method.end()) {
throw exception("Invalid method token.",status_code::bad_request);
}
m_method = method;
}
inline void request::set_uri(std::string const & uri) {
// TODO: validation?
m_uri = uri;
}
inline void request::process(std::string::iterator begin, std::string::iterator
end)
{
std::string::iterator cursor_start = begin;
std::string::iterator cursor_end = std::find(begin,end,' ');
if (cursor_end == end) {
throw exception("Invalid request line1",status_code::bad_request);
}
set_method(std::string(cursor_start,cursor_end));
cursor_start = cursor_end+1;
cursor_end = std::find(cursor_start,end,' ');
if (cursor_end == end) {
throw exception("Invalid request line2",status_code::bad_request);
}
set_uri(std::string(cursor_start,cursor_end));
set_version(std::string(cursor_end+1,end));
}
} // namespace parser
} // namespace http
} // namespace websocketpp
#endif // HTTP_PARSER_REQUEST_IMPL_HPP