rapidjson解析字符串

测试文本

{
    "method": "login",
    "params":
	{
		"username": "张三",
		"password": "123"
	}
}```

#include 
#include 

#include "rapidjson/rapidjson.h"
#include "rapidjson/document.h"
#include "rapidjson/filereadstream.h"
#include "rapidjson/filewritestream.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"

#include 

typedef websocketpp::server server;

using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;

// pull out the type of messages sent by our config
typedef server::message_ptr message_ptr;

// Define a callback to handle incoming messages
void on_message(server* s, websocketpp::connection_hdl hdl, message_ptr msg) {
	std::cout << "on_message called with hdl: " << hdl.lock().get()
		<< " and message: " << msg->get_payload()
		<< std::endl;

rapidjson::Document recvMsg;
recvMsg.Parse<0>(msg->get_payload().c_str());
if (recvMsg.HasParseError())
{
	rapidjson::ParseErrorCode code = recvMsg.GetParseError();
	std::cout << "Error code " << code << std::endl;
}
std::cout << std::endl<<"json parse success" << std::endl;
try
{
	if (recvMsg.HasMember("method"))
	{
		rapidjson::Value &jsonMethod = recvMsg["method"];
		std::string strMethod = jsonMethod.GetString();
		if (strMethod == "login")
		{
			if (recvMsg.HasMember("params"))
			{
				rapidjson::Value& jsonParam = recvMsg["params"];
				if (jsonParam.IsObject())
				{
					if (jsonParam.HasMember("username"))
					{
						std::cout << std::endl << "name" << jsonParam["username"].GetString() << std::endl;
					}
					if (jsonParam.HasMember("password"))
					{
						std::cout << std::endl << "password" << jsonParam["password"].GetString() << std::endl;
					}
				}
			}				
		}
	}
}
catch (...)
{
	std::cout << std::endl << "get value failed" << std::endl;
}
// check for a special command to instruct the server to stop listening so
// it can be cleanly exited.
if (msg->get_payload() == "stop-listening") {
	s->stop_listening();
	return;
}

try {
	s->send(hdl, msg->get_payload(), msg->get_opcode());
}
catch (websocketpp::exception const & e) {
	std::cout << "Echo failed because: "
		<< "(" << e.what() << ")" << std::endl;
}
}

int main() {
	// Create a server endpoint
	server echo_server;

try {
	// Set logging settings
	echo_server.set_access_channels(websocketpp::log::alevel::all);
	echo_server.clear_access_channels(websocketpp::log::alevel::frame_payload);

	// Initialize Asio
	echo_server.init_asio();

	// Register our message handler
	echo_server.set_message_handler(bind(&on_message, &echo_server, ::_1, ::_2));

	// Listen on port 9002
	echo_server.listen(9002);

	// Start the server accept loop
	echo_server.start_accept();

	// Start the ASIO io_service run loop
	echo_server.run();
}
catch (websocketpp::exception const & e) {
	std::cout << e.what() << std::endl;
}
catch (...) {
	std::cout << "other exception" << std::endl;
}
}