/usr/include/websocketpp/http/impl/parser.hpp is in libwebsocketpp-dev 0.7.0-11.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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_IMPL_HPP
#define HTTP_PARSER_IMPL_HPP
#include <algorithm>
#include <cstdlib>
#include <istream>
#include <sstream>
#include <string>
namespace websocketpp {
namespace http {
namespace parser {
inline void parser::set_version(std::string const & version) {
m_version = version;
}
inline std::string const & parser::get_header(std::string const & key) const {
header_list::const_iterator h = m_headers.find(key);
if (h == m_headers.end()) {
return empty_header;
} else {
return h->second;
}
}
inline bool parser::get_header_as_plist(std::string const & key,
parameter_list & out) const
{
header_list::const_iterator it = m_headers.find(key);
if (it == m_headers.end() || it->second.size() == 0) {
return false;
}
return this->parse_parameter_list(it->second,out);
}
inline void parser::append_header(std::string const & key, std::string const &
val)
{
if (std::find_if(key.begin(),key.end(),is_not_token_char) != key.end()) {
throw exception("Invalid header name",status_code::bad_request);
}
if (this->get_header(key).empty()) {
m_headers[key] = val;
} else {
m_headers[key] += ", " + val;
}
}
inline void parser::replace_header(std::string const & key, std::string const &
val)
{
m_headers[key] = val;
}
inline void parser::remove_header(std::string const & key) {
m_headers.erase(key);
}
inline void parser::set_body(std::string const & value) {
if (value.size() == 0) {
remove_header("Content-Length");
m_body.clear();
return;
}
// TODO: should this method respect the max size? If so how should errors
// be indicated?
std::stringstream len;
len << value.size();
replace_header("Content-Length", len.str());
m_body = value;
}
inline bool parser::parse_parameter_list(std::string const & in,
parameter_list & out) const
{
if (in.size() == 0) {
return false;
}
std::string::const_iterator it;
it = extract_parameters(in.begin(),in.end(),out);
return (it == in.begin());
}
inline bool parser::prepare_body() {
if (!get_header("Content-Length").empty()) {
std::string const & cl_header = get_header("Content-Length");
char * end;
// TODO: not 100% sure what the compatibility of this method is. Also,
// I believe this will only work up to 32bit sizes. Is there a need for
// > 4GiB HTTP payloads?
m_body_bytes_needed = std::strtoul(cl_header.c_str(),&end,10);
if (m_body_bytes_needed > m_body_bytes_max) {
throw exception("HTTP message body too large",
status_code::request_entity_too_large);
}
m_body_encoding = body_encoding::plain;
return true;
} else if (get_header("Transfer-Encoding") == "chunked") {
// TODO
//m_body_encoding = body_encoding::chunked;
return false;
} else {
return false;
}
}
inline size_t parser::process_body(char const * buf, size_t len) {
if (m_body_encoding == body_encoding::plain) {
size_t processed = (std::min)(m_body_bytes_needed,len);
m_body.append(buf,processed);
m_body_bytes_needed -= processed;
return processed;
} else if (m_body_encoding == body_encoding::chunked) {
// TODO:
throw exception("Unexpected body encoding",
status_code::internal_server_error);
} else {
throw exception("Unexpected body encoding",
status_code::internal_server_error);
}
}
inline void parser::process_header(std::string::iterator begin,
std::string::iterator end)
{
std::string::iterator cursor = std::search(
begin,
end,
header_separator,
header_separator + sizeof(header_separator) - 1
);
if (cursor == end) {
throw exception("Invalid header line",status_code::bad_request);
}
append_header(strip_lws(std::string(begin,cursor)),
strip_lws(std::string(cursor+sizeof(header_separator)-1,end)));
}
inline std::string parser::raw_headers() const {
std::stringstream raw;
header_list::const_iterator it;
for (it = m_headers.begin(); it != m_headers.end(); it++) {
raw << it->first << ": " << it->second << "\r\n";
}
return raw.str();
}
} // namespace parser
} // namespace http
} // namespace websocketpp
#endif // HTTP_PARSER_IMPL_HPP
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