我将尝试使用ptree本地存储信息并通过boost message_queue发送JSON消息。
以下是接收方的代码:
#include <boost/interprocess/ipc/message_queue.hpp>
#include <iostream>
#include <string>
//#include <boost/archive/text_iarchive.hpp>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/serialization/string.hpp>
using boost::interprocess::message_queue;
using boost::property_tree::ptree; using boost::property_tree::read_json;
#define MAX_SIZE 1000
int main()
{
message_queue mq (boost::interprocess::open_or_create,"coda",10,MAX_SIZE);
message_queue::size_type recv_size;
unsigned int priority;
ptree pt;
std::stringstream iss;
std::string serialized_string;
serialized_string.resize(MAX_SIZE);
mq.receive(&serialized_string[0],MAX_SIZE,recv_size,priority);
iss << serialized_string;
std::istringstream is(iss.str());
read_json(is, pt);
std::cout pt.get<std::string>("prefix") << pt.get<std::string>("faceID") << std::endl;
}
以下是发送方的代码:
#include <boost/interprocess/ipc/message_queue.hpp>
#include <boost/serialization/string.hpp>
#include <string>
#include <sstream>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
using boost::interprocess::message_queue;
using boost::property_tree::ptree; using boost::property_tree::write_json;
#define MAX_SIZE 1000
void send(ptree pt)
{
std::stringstream oss;
write_json(oss,pt);
std::string serialized_strings(oss.str());
message_queue mq(boost::interprocess::open_only,"coda");
mq.send(serialized_strings.data(), serialized_strings.size(),0);
std::cout << oss.str() << std::endl;
}
int main()
{
ptree pt;
pt.put("prefix","standard");
pt.put("faceID",42);
send(pt);
}
发送者正在工作,并有以下输出:
$ ./sendptree
{
"prefix": "standard",
"faceID": "42"
}
接收方正确接收了数据,但在使用read_json函数时未能成功解析数据。
$ ./recvptree
{
"prefix": "standard",
"faceID": "42"
}
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::property_tree::json_parser::json_parser_error> >'
what(): <unspecified file>(5): expected end of input
[1] 24052 abort ./recvptree