/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2012 Artem Pavlenko * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * *****************************************************************************/ #ifndef MAPNIK_CSV_UTILS_DATASOURCE_HPP #define MAPNIK_CSV_UTILS_DATASOURCE_HPP #include #include namespace csv_utils { static void fix_json_quoting(std::string & csv_line) { std::string wrapping_char; std::string::size_type j_idx; std::string::size_type post_idx; std::string::size_type j_idx_double = csv_line.find("\"{"); std::string::size_type j_idx_single = csv_line.find("'{"); if (j_idx_double != std::string::npos) { wrapping_char = "\""; j_idx = j_idx_double; post_idx = csv_line.find("}\""); } else if (j_idx_single != std::string::npos) { wrapping_char = "'"; j_idx = j_idx_single; post_idx = csv_line.find("}'"); } // we are positive it is valid json if (!wrapping_char.empty()) { // grab the json chunk std::string json_chunk = csv_line.substr(j_idx,post_idx+wrapping_char.size()); bool does_not_have_escaped_double_quotes = (json_chunk.find("\\\"") == std::string::npos); // ignore properly escaped quotes like \" which need no special handling if (does_not_have_escaped_double_quotes) { std::string pre_json = csv_line.substr(0,j_idx); std::string post_json = csv_line.substr(post_idx+wrapping_char.size()); // handle "" in a string wrapped in " // http://tools.ietf.org/html/rfc4180#section-2 item 7. // e.g. "{""type"":""Point"",""coordinates"":[30.0,10.0]}" if (json_chunk.find("\"\"") != std::string::npos) { boost::algorithm::replace_all(json_chunk,"\"\"","\\\""); csv_line = pre_json + json_chunk + post_json; } // handle " in a string wrapped in ' // e.g. '{"type":"Point","coordinates":[30.0,10.0]}' else { // escape " because we cannot exchange for single quotes // https://github.com/mapnik/mapnik/issues/1408 boost::algorithm::replace_all(json_chunk,"\"","\\\""); boost::algorithm::replace_all(json_chunk,"'","\""); csv_line = pre_json + json_chunk + post_json; } } } } } #endif // MAPNIK_CSV_UTILS_DATASOURCE_HPP