Update JsonCPP to 1.8.3 (#6466)

* Update JsonCPP to 1.8.3

* Fix deprecated functions

Json::FastWriter, Json::StyledWriter and Json::Reader are marked deprecated since 1.1 and are deprecated in 0.8 but not shown at compilation time.

Use new methods to serialize/deserialize

src/convert_json.cpp

@@ -46,12 +46,15 @@ Json::Value fetchJsonValue(const std::string &url,
 		return Json::Value();
 	}
 	Json::Value root;
-	Json::Reader reader;
 	std::istringstream stream(fetch_result.data);
 
-	if (!reader.parse(stream, root)) {
+	Json::CharReaderBuilder builder;
+	builder.settings_["collectComments"] = false;
+	std::string errs;
+
+	if (!Json::parseFromStream(builder, stream, &root, &errs)) {
 		errorstream << "URL: " << url << std::endl;
-		errorstream << "Failed to parse json data " << reader.getFormattedErrorMessages();
+		errorstream << "Failed to parse json data " << errs << std::endl;
 		if (fetch_result.data.size() > 100) {
 			errorstream << "Data (" << fetch_result.data.size()
 				<< " bytes) printed to warningstream." << std::endl;
@@ -64,3 +67,13 @@ Json::Value fetchJsonValue(const std::string &url,
 
 	return root;
 }
+
+std::string fastWriteJson(const Json::Value &value)
+{
+	std::ostringstream oss;
+	Json::StreamWriterBuilder builder;
+	builder["indentation"] = "";
+	std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
+	writer->write(value, &oss);
+	return oss.str();
+}

src/convert_json.h

@@ -23,3 +23,5 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 Json::Value fetchJsonValue(const std::string &url,
 		std::vector<std::string> *extra_headers);
+
+std::string fastWriteJson(const Json::Value &value);

src/mods.cpp

@@ -26,6 +26,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "subgame.h"
 #include "settings.h"
 #include "porting.h"
+#include "convert_json.h"
 
 static bool parseDependsLine(std::istream &is,
 		std::string &dep, std::set<char> &symbols)
@@ -374,7 +375,7 @@ bool ModMetadata::save(const std::string &root_path)
 	}
 
 	bool w_ok = fs::safeWriteToFile(root_path + DIR_DELIM + m_mod_name,
-		Json::FastWriter().write(json));
+			fastWriteJson(json));
 
 	if (w_ok) {
 		m_modified = false;
@@ -393,11 +394,14 @@ bool ModMetadata::load(const std::string &root_path)
 		return false;
 	}
 
-	Json::Reader reader;
 	Json::Value root;
-	if (!reader.parse(is, root)) {
+	Json::CharReaderBuilder builder;
+	builder.settings_["collectComments"] = false;
+	std::string errs;
+
+	if (!Json::parseFromStream(builder, is, &root, &errs)) {
 		errorstream << "ModMetadata[" << m_mod_name << "]: failed read data "
-			"(Json decoding failure)." << std::endl;
+			"(Json decoding failure). Message: " << errs << std::endl;
 		return false;
 	}
 

src/remoteplayer.cpp

@@ -26,6 +26,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "porting.h"  // strlcpy
 #include "server.h"
 #include "settings.h"
+#include "convert_json.h"
 
 /*
 	RemotePlayer
@@ -76,8 +77,8 @@ void RemotePlayer::serializeExtraAttributes(std::string &output)
 		json_root[attr.first] = attr.second;
 	}
 
-	Json::FastWriter writer;
-	output = writer.write(json_root);
+	output = fastWriteJson(json_root);
+
 	m_sao->setExtendedAttributeModified(false);
 }
 
@@ -120,9 +121,13 @@ void RemotePlayer::deSerialize(std::istream &is, const std::string &playername,
 
 		try {
 			const std::string &extended_attributes = args.get("extended_attributes");
-			Json::Reader reader;
+			std::istringstream iss(extended_attributes);
+			Json::CharReaderBuilder builder;
+			builder.settings_["collectComments"] = false;
+			std::string errs;
+
 			Json::Value attr_root;
-			reader.parse(extended_attributes, attr_root);
+			Json::parseFromStream(builder, iss, &attr_root, &errs);
 
 			const Json::Value::Members attr_list = attr_root.getMemberNames();
 			for (const auto &it : attr_list) {

src/script/lua_api/l_util.cpp

@@ -27,6 +27,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <json/json.h>
 #include "cpp_api/s_security.h"
 #include "porting.h"
+#include "convert_json.h"
 #include "debug.h"
 #include "log.h"
 #include "tool.h"
@@ -95,12 +96,14 @@ int ModApiUtil::l_parse_json(lua_State *L)
 	Json::Value root;
 
 	{
-		Json::Reader reader;
 		std::istringstream stream(jsonstr);
 
-		if (!reader.parse(stream, root)) {
-			errorstream << "Failed to parse json data "
-				<< reader.getFormattedErrorMessages();
+		Json::CharReaderBuilder builder;
+		builder.settings_["collectComments"] = false;
+		std::string errs;
+
+		if (!Json::parseFromStream(builder, stream, &root, &errs)) {
+			errorstream << "Failed to parse json data " << errs << std::endl;
 			size_t jlen = strlen(jsonstr);
 			if (jlen > 100) {
 				errorstream << "Data (" << jlen
@@ -145,11 +148,9 @@ int ModApiUtil::l_write_json(lua_State *L)
 
 	std::string out;
 	if (styled) {
-		Json::StyledWriter writer;
-		out = writer.write(root);
+		out = root.toStyledString();
 	} else {
-		Json::FastWriter writer;
-		out = writer.write(root);
+		out = fastWriteJson(root);
 	}
 	lua_pushlstring(L, out.c_str(), out.size());
 	return 1;

src/serverlist.cpp

@@ -185,8 +185,8 @@ const std::string serializeJson(const std::vector<ServerListSpec> &serverlist)
 		list.append(it);
 	}
 	root["list"] = list;
-	Json::FastWriter writer;
-	return writer.write(root);
+
+	return fastWriteJson(root);
 }
 
 
@@ -249,10 +249,9 @@ void sendAnnounce(AnnounceAction action,
 			server["lag"] = lag;
 	}
 
-	Json::FastWriter writer;
 	HTTPFetchRequest fetch_request;
 	fetch_request.url = g_settings->get("serverlist_url") + std::string("/announce");
-	fetch_request.post_fields["json"] = writer.write(server);
+	fetch_request.post_fields["json"] = fastWriteJson(server);
 	fetch_request.multipart = true;
 	httpfetch_async(fetch_request);
 }