src/convert_json.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include <vector>
  21 #include <iostream>
  22 #include <sstream>
  23
  24 #include "convert_json.h"
  25 #include "content/mods.h"
  26 #include "config.h"
  27 #include "log.h"
  28 #include "settings.h"
  29 #include "httpfetch.h"
  30 #include "porting.h"
  31
  32 Json::Value fetchJsonValue(const std::string &url,
  33                 std::vector<std::string> *extra_headers)
  34 {
  35         HTTPFetchRequest fetch_request;
  36         HTTPFetchResult fetch_result;
  37         fetch_request.url = url;
  38         fetch_request.caller = HTTPFETCH_SYNC;
  39
  40         if (extra_headers != NULL)
  41                 fetch_request.extra_headers = *extra_headers;
  42
  43         httpfetch_sync(fetch_request, fetch_result);
  44
  45         if (!fetch_result.succeeded) {
  46                 return Json::Value();
  47         }
  48         Json::Value root;
  49         std::istringstream stream(fetch_result.data);
  50
  51         Json::CharReaderBuilder builder;
  52         builder.settings_["collectComments"] = false;
  53         std::string errs;
  54
  55         if (!Json::parseFromStream(builder, stream, &root, &errs)) {
  56                 errorstream << "URL: " << url << std::endl;
  57                 errorstream << "Failed to parse json data " << errs << std::endl;
  58                 if (fetch_result.data.size() > 100) {
  59                         errorstream << "Data (" << fetch_result.data.size()
  60                                 << " bytes) printed to warningstream." << std::endl;
  61                         warningstream << "data: \"" << fetch_result.data << "\"" << std::endl;
  62                 } else {
  63                         errorstream << "data: \"" << fetch_result.data << "\"" << std::endl;
  64                 }
  65                 return Json::Value();
  66         }
  67
  68         return root;
  69 }
  70
  71 std::string fastWriteJson(const Json::Value &value)
  72 {
  73         std::ostringstream oss;
  74         Json::StreamWriterBuilder builder;
  75         builder["indentation"] = "";
  76         std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
  77         writer->write(value, &oss);
  78         return oss.str();
  79 }