I am using boost for creating JSON string. I am trying to send this JSON string to server via http POST.
Following is the string created by Boost
{"TokenNo":"ABC123456","CPUID":"ABC123456","CommandID":"09","IsEncrypted":"0","CommandString:[{"ADD":"97","ESTBCODE":"99999999","EID":"XY","CID":"0154400000","DATE":"14042015","TIME":"1835","IOMODE":"I","REASONCODE":"55","LAT":"87","LONG":"90"}, {"ADD":"87","ESTBCODE":"99999998","EID":"XX","CID":"0154300000","DATE":"15052015","TIME":"1947","IOMODE":"O","REASONCODE":"54","LAT":"89","LONG":"91"}]}
The above json string is what I expected from the answers of my previous question . But after forming the correct json arrays i am still unable to send this string.
The server needs the JSON string in following format:
{"TokenNo":"ABC123456","CPUID":"ABC123456","CommandID":"09","IsEncrypted":"0","CommandString:[{\"ADD\":\"97\",\"ESTBCODE\":\"99999999\",\"EID\":\"XY\",\"CID\":\"0154400000\",\"DATE\":\"14042015\",\"TIME\":\"1835\",\"IOMODE\":\"I\",\"REASONCODE\":\"55\",\"LAT\":\"87\",\"LONG\":\"90\"}, {\"ADD\":\"87\",\"ESTBCODE\":\"99999998\",\"EID\":\"XX\",\"CID\":\"0154300000\",\"DATE\":\"15052015\",\"TIME\":\"1947\",\"IOMODE\":\"O\",\"REASONCODE\":\"54\",\"LAT\":\"89\",\"LONG\":\"91\"}]}
Where are the required " \ " ?
Below is my DBAccess.cpp file
using namespace boost::property_tree;
ptree pt;
ptree pt1;
ptree pt2;
//===============XX==============XX================//
list<AttendanceT> sqliteDB::GET_Attendance()
{
sqlite3 *db;
const char *sql;
sqlite3_stmt * stmt;
/*-----
Code to access Database
------*/
sqlite3_finalize(stmt);
sqlite3_close(db);
return AttendanceT_list;
}
//===============XX==============XX================//
void sqliteDB::writeJson(std::ostream& os) const {
for (auto &entry : AttendanceT_list)
{
pt.put("ADD", entry.Atten_Addr);
pt.put("ESTBCODE", entry.Atten_EstablishmentCode);
pt.put("EID", entry.Atten_EmployeeID);
pt.put("CID", entry.Atten_CardID);
pt.put("DATE", entry.Atten_PunchDate);
pt.put("TIME", entry.Atten_PunchTime);
pt.put("IOMODE", entry.Atten_InOutMode);
pt.put("REASONCODE", entry.Atten_ReasonCode);
pt.put("LAT", entry.Atten_Lat);
pt.put("LONG", entry.Atten_Long);
pt1.push_back(ptree::value_type("", pt));
}
write_json(os, pt1, false);
}//Function ends here
//===============XX==============XX================//
template <typename List>
void sqliteDB::printList(List const& list)
{
int s = list.size();
std::cout << "The number of Records is: " << s << "\n";
for (auto& r : list) std::cout << r << "";
}
//===============XX==============XX================//
string sqliteDB::dump(sqliteDB const& db)
{
printList(db.get());
std::cout << "\n==============[ AS JSON ]===============\n";
db.writeJson(std::cout);
std::ofstream file("output1.txt");
// db.writeJson(file);
ifstream myReadFile;
myReadFile.open("output1.txt");
string output1;
if (myReadFile.is_open())
{
while (!myReadFile.eof())
{
myReadFile >> output1;
}
}
myReadFile.close();
return output1;
}
//===============XX==============XX================//
std::string sqliteDB::to_json(POST3 const& o)
{
pt2.put("TokenNo", o.TokenNo);
pt2.put("CPUID", o.CPUID);
pt2.put("CommandID", o.CommandID);
pt2.put("IsEncrypted", o.IsEncrypted);
pt2.push_back(ptree::value_type("CommandString", pt1));
std::ostringstream oss;
boost::property_tree::write_json(oss, pt2, false);
std:: string json;
json = oss.str();
//=======SENDING(POSTING) DATA TO THE SERVER USING BOOST ASIO======//
try{/*-----Code of HTTP POST------*/}
catch (std::exception& e){ }
return oss.str();
}
//===============XX==============XX================//
Below is content of DbAccess.h file
//=========================//
struct AttendanceT
{
string Atten_Addr;
string Atten_EstablishmentCode;
string Atten_EmployeeID;
string Atten_CardID;
string Atten_PunchDate;
string Atten_PunchTime;
string Atten_InOutMode;
string Atten_ReasonCode;
string Atten_Lat;
string Atten_Long;
};
struct POST3
{
public:
std::string TokenNo;
std::string CPUID;
std::string CommandID;
std::string IsEncrypted;
std::string JSON_Cmnd_String;
};
//=========================//
class sqliteDB {
public:
//---
some other function declaration
----//
void printList(List const& list);
string dump(sqliteDB const& db);
string to_json(POST3 const& o);
};
And this is main.cpp file
int main()
{
sqliteDB object1;
object1.GET_Attendance();
object1.dump(object1);
POST3 obj { "ABC123456", "ABC123456", "09", "0" /*,object1.dump(object1)*/};
cout << "\nAll the statement were executed properly\n\n\n";
return 0;
}
I referred this resource here
I believe I am making some mistake while creating json string but I am not sure where exactly.
UPDATE
The boost Documentation says:
The property tree dataset is not typed, and does not support arrays as such. Thus, the following JSON / property tree mapping is used:
- JSON objects are mapped to nodes. Each property is a child node.
- JSON arrays are mapped to nodes. Each element is a child node with an empty name. If a node has both named and unnamed child nodes, it cannot be mapped to a JSON representation.
- JSON values are mapped to nodes containing the value. However, all type information is lost; numbers, as well as the literals "null", "true" and "false" are simply mapped to their string form.
- Property tree nodes containing both child nodes and data cannot be mapped.
So, Does that mean Boost does not completely conform to JSON standards ??
Kindly guide me. Thank you
