httpgateway: set new max payload length config value

gateway/httpgateway.cpp

@@ -33,6 +33,8 @@ HttpGateway::HttpGateway(const Config &config)
 		throw new std::runtime_error("No http.listenport in config file");
 	}
 	this->listenport = std::stoi(listenport);
+
+	this->maxPayloadLength = config.max_payload_length;
 }
 
 bool HttpGateway::keepReading()
@@ -90,7 +92,7 @@ httplib::Response HttpGateway::convertResponse(Response response)
 void HttpGateway::work(RequestWorker &worker)
 {
 	httplib::Server server;
-
+	server.set_payload_max_length(this->maxPayloadLength);
 	auto handler = [&](const httplib::Request &req, httplib::Response &res) {
 		Request wikiRequest = convertRequest(req);
 		Logger::debug() << "httpgateway: received request " << wikiRequest;

gateway/httpgateway.h

@@ -16,6 +16,7 @@ class HttpGateway : public GatewayInterface
 
 	std::string listenaddr;
 	int listenport;
+	uint64_t maxPayloadLength;
 
   public:
 	HttpGateway(const Config &config);