mirror of
https://github.com/XRPLF/rippled.git
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306 lines
8.2 KiB
C++
306 lines
8.2 KiB
C++
/*
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* Copyright (c) 2011, Peter Thorson. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the WebSocket++ Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef HTTP_PARSER_HPP
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#define HTTP_PARSER_HPP
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#include <iostream>
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#include <map>
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#include <string>
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#include <sstream>
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#include "constants.hpp"
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namespace websocketpp {
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namespace http {
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namespace parser {
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namespace state {
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enum value {
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METHOD,
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RESOURCE,
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VERSION,
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HEADERS
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};
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}
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typedef std::map<std::string,std::string> header_list;
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// VFALCO NOTE Can't we just use
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//
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// std::transform (str.begin (), str.end (), str.begin (), ::tolower);
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//
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// ?
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//
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static std::string tolower(const std::string& in)
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{
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std::string out = in;
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for (std::size_t i = 0; i < out.size(); ++i)
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if (isupper(out[i]))
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out[i] = ::tolower(out[i]);
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return out;
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}
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class parser {
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public:
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// consumes bytes from the stream and returns true if enough bytes have
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// been read
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bool consume (std::istream&) {
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throw "Not Implemented";
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}
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void set_version(const std::string& version) {
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// TODO: validation?
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m_version = version;
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}
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const std::string& version() const {
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return m_version;
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}
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std::string header(const std::string& key) const {
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header_list::const_iterator h = m_headers.find(key);
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if (h != m_headers.end()) {
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return h->second;
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}
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h = m_headers.find(tolower(key));
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if (h == m_headers.end()) {
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return "";
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} else {
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return h->second;
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}
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}
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// multiple calls to add header will result in values aggregating.
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// use replace_header if you do not want this behavior.
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void add_header(const std::string &key, const std::string &val) {
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// TODO: prevent use of reserved headers?
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if (this->header(key) == "") {
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m_headers[key] = val;
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} else {
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m_headers[key] += ", " + val;
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}
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}
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void replace_header(const std::string &key, const std::string &val) {
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m_headers[key] = val;
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}
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void remove_header(const std::string &key) {
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m_headers.erase(key);
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}
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protected:
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bool parse_headers(std::istream& s) {
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std::string header;
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std::string::size_type end;
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// get headers
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while (std::getline(s, header) && header != "\r") {
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if (header[header.size()-1] != '\r') {
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continue; // ignore malformed header lines?
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} else {
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header.erase(header.end()-1);
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}
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end = header.find(": ",0);
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if (end != std::string::npos) {
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add_header(header.substr(0,end),header.substr(end+2));
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}
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}
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return true;
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}
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std::string raw_headers() {
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std::stringstream raw;
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header_list::iterator it;
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for (it = m_headers.begin(); it != m_headers.end(); it++) {
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raw << it->first << ": " << it->second << "\r\n";
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}
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return raw.str();
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}
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private:
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std::string m_version;
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header_list m_headers;
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};
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class request : public parser {
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public:
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// parse a complete header (ie \r\n\r\n MUST be in the input stream)
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bool parse_complete(std::istream& s) {
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std::string request;
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// get status line
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std::getline(s, request);
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if (request[request.size()-1] == '\r') {
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request.erase(request.end()-1);
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std::stringstream ss(request);
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std::string val;
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ss >> val;
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set_method(val);
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ss >> val;
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set_uri(val);
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ss >> val;
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set_version(val);
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} else {
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set_method(request);
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return false;
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}
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return parse_headers(s);
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}
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// TODO: validation. Make sure all required fields have been set?
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std::string raw() {
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std::stringstream raw;
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raw << m_method << " " << m_uri << " " << version() << "\r\n";
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raw << raw_headers() << "\r\n";
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return raw.str();
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}
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void set_method(const std::string& method) {
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// TODO: validation?
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m_method = method;
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}
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const std::string& method() const {
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return m_method;
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}
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void set_uri(const std::string& uri) {
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// TODO: validation?
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m_uri = uri;
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}
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const std::string& uri() const {
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return m_uri;
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}
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private:
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std::string m_method;
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std::string m_uri;
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};
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class response : public parser {
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public:
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// parse a complete header (ie \r\n\r\n MUST be in the input stream)
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bool parse_complete(std::istream& s) {
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std::string response;
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// get status line
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std::getline(s, response);
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if (response[response.size()-1] == '\r') {
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response.erase(response.end()-1);
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std::stringstream ss(response);
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std::string str_val;
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int int_val;
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char char_val[256];
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ss >> str_val;
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set_version(str_val);
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ss >> int_val;
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ss.getline(char_val,256);
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set_status(status_code::value(int_val),std::string(char_val));
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} else {
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return false;
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}
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return parse_headers(s);
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}
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// TODO: validation. Make sure all required fields have been set?
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std::string raw() {
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std::stringstream raw;
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raw << version() << " " << m_status_code << " " << m_status_msg << "\r\n";
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raw << raw_headers() << "\r\n";
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raw << m_body;
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return raw.str();
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}
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void set_status(status_code::value code) {
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// TODO: validation?
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m_status_code = code;
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m_status_msg = get_string(code);
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}
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void set_status(status_code::value code, const std::string& msg) {
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// TODO: validation?
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m_status_code = code;
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m_status_msg = msg;
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}
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void set_body(const std::string& value) {
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if (value.size() == 0) {
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remove_header("Content-Length");
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m_body = "";
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return;
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}
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std::stringstream foo;
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foo << value.size();
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replace_header("Content-Length", foo.str());
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m_body = value;
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}
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status_code::value get_status_code() const {
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return m_status_code;
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}
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const std::string& get_status_msg() const {
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return m_status_msg;
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}
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private:
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status_code::value m_status_code;
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std::string m_status_msg;
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std::string m_body;
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};
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}
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}
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}
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#endif // HTTP_PARSER_HPP
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