I am currently working on a project in C++ using rapidjson.
My program receives some JSON data on a socket which includes some authentication details. I log the incoming message, but I want to hide the password so it can't be seen in the log file. So I am trying to get the JSON object, and replace each character of the string and put this replaced string back into the json object where the password was.
Below is the code that I have:
rapidjson::Document jsonObject;
jsonObject.Parse(command.c_str());
string method = jsonObject["method"].GetString();
if (jsonObject.HasMember("sshDetails"))
{
Value& sshDetails = jsonObject["sshDetails"];
string sshPassword = sshDetails["sshPassword"].GetString();
for (int i = 0; i < sshPassword.length(); i++)
{
sshPassword[i] = '*';
}
rapidjson::Value::Member* sshPasswordMember = sshDetails.FindMember("sshPassword");
sshPasswordMember->name.SetString(sshPassword.c_str(), jsonObject.GetAllocator());
//Convert it back to a string
rapidjson::StringBuffer buffer;
buffer.Clear();
rapidjson::Writer<rapidjson::StringBuffer>writer(buffer);
Document jsonDoc;
jsonDoc.Accept(writer);
string jsonString = string(buffer.GetString());
I'm getting an error on the following line:
rapidjson::Value::Member* sshPasswordMember = sshDetails.FindMember("sshPassword");
The error I am getting is:
No suitable conversion function from rapidjson::GenericMemberIterator<false, rapidjson::UTF8<char>, rapidjson::MemoryPoolAllocator<rapidjson::CtrlAllocator>> to rapidjson::GenericMember::UTF8<char>, myProject...SocketProcessor.cpp
rapidjson::MemoryPoolAllocator<rapidjson::CtrlAllocator>>*exists
I took the above from an example on another question on SO which was an accepted answer from rapidjson - change key to another value, so what am I missing.
I've managed to find the answer to this with a bit of playing round and luck.
I changed
rapidjson::Value::Member* sshPasswordMember = sshDetails.FindMember("sshPassword");
sshPasswordMember->name.SetString(sshPassword.c_str(), jsonObject.GetAllocator());
to be
rapidjson::Value::MemberIterator sshPasswordMember = sshDetails.FindMember("sshPassword");
sshPasswordMember->value.SetString(sshPassword.c_str(), jsonObject.GetAllocator());
using rapidjson in my project I found out that many of such problems can be omitted by the use of auto instead of specifying the type
Related
I'd like to make a POC of using leveldb in order to store key-value table of different data types in protobuf format.
So far I was able to open the database file, and I also saw the get function with the following signature :
virtual Status Get(const ReadOptions& options, const Slice& key, std::string* value)=0
I understand that the value is actually refers to a binary string like vector and not regular alphanumeric string, so I guess it can fit for multi type primitives like string, uint, enum) but how can it support struct/class that represent protobuf layout in c++ ?
So this is my proto file that I'd like to store in the leveldb:
message agentStatus {
string ip = 1;
uint32 port = 2;
string url = 3;
google.protobuf.Timestamp last_seen = 4;
google.protobuf.Timestamp last_keepalive = 5;
bool status = 6;
}
and this is my current POC code. How can I use the get method to access any of the variables from the table above ?
#include <leveldb/db.h>
void main () {
std::string db_file_path = "/tmp/data.db";
leveldb::DB* db;
leveldb::Status status;
leveldb::Options options;
options.create_if_missing = false;
status_ = leveldb::DB::Open(options, db_file_path, &db);
if (!status_.ok()) {
throw std::logic_error("unable to open db");
}
Thanks !
You need to serialize the protobuf message into a binary string, i.e. SerilaizeToString, and use the Put method to write the binary string to LevelDB with a key.
Then you can use the Get method to retrieve the binary value with the given key, and parse the binary string to a protobuf message, i.e. ParseFromString.
Finally, you can get fields of the message.
I want to create following json request:
{
"Value1":{},
"Value2":"some string value"
}
to achieve this I have tried following code in cpp:
json::value &refRequest
json::value jRequest = json::value();
refRequest[requestKey::Value1] = json::value(json::value::object()); //for creating empty object
refRequest[requestKey::Value2] = json::value::string("some string");
but it gives output as:
{
"Value1":},
"Value2":"some string value"
}
if you observe, instead of returning empty object as {} it gives the output as } and this results in to malformed request. I am not sure where exactly I am going wrong, any help will would be appreciated. Thanks
I believe your mistake is that you are constructing a json::value from a json::value::object()
According to the documentation the line should be fixed to:
refRequest[requestKey::Value1] = json::value::object();
I was trying my hands with C++ REST APIs
I wrote to json using below way.
json::value resp;
std::vector<Portfolio> portfolio;
// Populate portfolio
this->PortfolioList(usrStr, pwdStr, portfolio);
std::vector<Portfolio>::iterator it;
for (it = portfolio.begin(); it != portfolio.end(); it++)
{
char costBuff[40]; _itoa_s(it->GetTotalCost(), costBuff, 10);
char qtyBuff[40]; _itoa_s(it->GetQuantity(), qtyBuff, 10);
json::value portfolioEntry;
portfolioEntry[U("username")] = json::value::string(utility::conversions::to_string_t(it->GetUserName()));
portfolioEntry[U("stockCode")] = json::value::string(utility::conversions::to_string_t(it->GetStockCode()));
portfolioEntry[U("quantity")] = json::value::string(utility::conversions::to_string_t(qtyBuff));
portfolioEntry[U("totalcost")] = json::value::string(utility::conversions::to_string_t(costBuff));
resp[utility::conversions::to_string_t(it->GetStockCode())] = portfolioEntry;
}
For this I got output as below
{
"11002":{"quantity":11002,"totalcost":"272","username":"arunavk"},
"11003":{"quantity":11003,"totalcost":"18700","username":"arunavk"},
"11004":{"quantity":11004,"totalcost":"760","username":"arunavk"},
"11005":{"quantity":11005,"totalcost":"32","username":"arunavk"}
}
Now, on the receiving end, I tried to read it as below
for (int i = 0; i < size; i++)
{
table->elementAt(i, 0)->addWidget(new Wt::WText(this->response[i][0].as_string()));
table->elementAt(i, 1)->addWidget(new Wt::WText(this->response[i][1].as_string()));
table->elementAt(i, 2)->addWidget(new Wt::WText(this->response[i][2].as_string()));
table->elementAt(i, 3)->addWidget(new Wt::WText(this->response[i][3].as_string()));
}
But it fails. What am I missing ?
Pardon me, I am new to this REST and Casablanca and JSON
From JSON point of view the following
{
"11002":{"quantity":11002,"totalcost":"272","username":"arunavk"},
"11003":{"quantity":11003,"totalcost":"18700","username":"arunavk"},
"11004":{"quantity":11004,"totalcost":"760","username":"arunavk"},
"11005":{"quantity":11005,"totalcost":"32","username":"arunavk"}
}
is java script object with properties "11002", ... "11005", is not array. So if you want to get value of property you have to use property name:
this->response["11002"]["quantity"]
because when you use integer index the json::value::operator [] supposes that you want to access the array element. Here is details https://microsoft.github.io/cpprestsdk/classweb_1_1json_1_1value.html#a56c751a1c22d14b85b7f41a724100e22
UPDATED
If you do not know properties of the recieved object, you can call the value::as_object method (https://microsoft.github.io/cpprestsdk/classweb_1_1json_1_1value.html#a732030bdee11c2f054299a0fb148df0e) to get JSON object and after that you can use specilized interface to iterate through the fields with begin and end iterators: https://microsoft.github.io/cpprestsdk/classweb_1_1json_1_1object.html#details
We are receiving this callback using ExitGames Photon Realtime engine when an event is fired
customEventAction(int playerNr,
nByte eventCode,
const ExitGames::Common::Object& eventContent)
If the object is a string we use this code to extract it
ExitGames::Common::JString str =
ExitGames::Common::ValueObject<ExitGames::Common::JString>(eventContent).getDataCopy();
However, the object being sent is a dictionary. It's being sent from the server using BroadcastEvent.
How do we get data out of it ?
We've tried this, but it doesn't make any sense:
ExitGames::Common::Dictionary<byte,ExitGames::Common::Object> pdic
= ExitGames::Common::ValueObject<ExitGames::Common::Dictionary<byte,ExitGames::Common::Object>>(eventContent).getDataCopy();
I've found code to get the data from a hashtable, but that doesn't work either.
thanks
Shaun
ExitGames::Common::Dictionary<nByte, ExitGames::Common::Object> dic = ExitGames::Common::ValueObject<ExitGames::Common::Dictionary<nByte, ExitGames::Common::Object> >(eventContent).getDataCopy();
is absolutely correct and works for me.
The cause of your problem must be inside another line.
When you replace the implementations of sendEvent() and customEventAction() in demo_loadBalancing inside one of the Photon C++ client SDKs with the following snippets, then that demo successfully sends and receives a Dictionary:
send:
void NetworkLogic::sendEvent(void)
{
ExitGames::Common::ValueObject<ExitGames::Common::JString> obj(L"test");
ExitGames::Common::Dictionary<nByte, ExitGames::Common::Object> dic;
dic.put(1, obj);
mLoadBalancingClient.opRaiseEvent(false, dic, 0);
}
receive:
void NetworkLogic::customEventAction(int /*playerNr*/, nByte /*eventCode*/, const ExitGames::Common::Object& eventContent)
{
EGLOG(ExitGames::Common::DebugLevel::ALL, L"");
ExitGames::Common::Dictionary<nByte, ExitGames::Common::Object> dic = ExitGames::Common::ValueObject<ExitGames::Common::Dictionary<nByte, ExitGames::Common::Object> >(eventContent).getDataCopy();
const ExitGames::Common::Object* pObj = dic.getValue(1);
ExitGames::Common::JString str = ExitGames::Common::ValueObject<ExitGames::Common::JString>(pObj).getDataCopy();
mpOutputListener->write(L"received the following string as Dictionary value: " + str);
}
This gives me the following line of output on the receiving client:
received the following string as Dictionary value: test
I'm generating a reporting services report from an ASP.NET (MVC) based application but am having problems setting the parameters for the report.
I believe the issue has only occurred since we upgraded SQL Server from 2005 to 2008 R2 (and Reporting Services along with it).
The original error encountered was from calling rsExec.Render:
Procedure or function 'pCommunication_ReturnRegistrationLetterDetails'
expects parameter '#guid', which was not supplied.
Debugging the code I noticed that rsExec.SetExecutionParameters is returning the following response:
Cannot call 'NameOfApp.SQLRSExec.ReportExecutionService.SetExecutionParameters(NameOfApp.SQLRSExec.ParameterValue[],
string)' because it is a web method.
Here is the function in it's entirety:
public static bool ProduceReportToFile(string reportname, string filename, string[,] reportparams,
string fileformat)
{
bool successful = false;
SQLRS.ReportingService2005 rs = new SQLRS.ReportingService2005();
SQLRSExec.ReportExecutionService rsExec = new NameOfApp.SQLRSExec.ReportExecutionService();
rs.Credentials = System.Net.CredentialCache.DefaultCredentials;
rsExec.Credentials = System.Net.CredentialCache.DefaultCredentials;
// Prepare Render arguments
string historyID = null;
string deviceInfo = null;
// Prepare format - available options are "PDF","Word","CSV","TIFF","XML","EXCEL"
string format = fileformat;
Byte[] results;
string encoding = String.Empty;
string mimeType = String.Empty;
string extension = String.Empty;
SQLRSExec.Warning[] warnings = null;
string[] streamIDs = null;
// Define variables needed for GetParameters() method
// Get the report name
string _reportName = reportname;
string _historyID = null;
bool _forRendering = false;
SQLRS.ParameterValue[] _values = null;
SQLRS.DataSourceCredentials[] _credentials = null;
SQLRS.ReportParameter[] _parameters = null;
// Get if any parameters needed.
_parameters = rs.GetReportParameters(_reportName, _historyID,
_forRendering, _values, _credentials);
// Load the selected report.
SQLRSExec.ExecutionInfo ei =
rsExec.LoadReport(_reportName, historyID);
// Prepare report parameter.
// Set the parameters for the report needed.
SQLRSExec.ParameterValue[] parameters =
new SQLRSExec.ParameterValue[1];
// Place to include the parameter.
if (_parameters.Length > 0)
{
for (int i = 0; i < _parameters.Length; i++)
{
parameters[i] = new SQLRSExec.ParameterValue();
parameters[i].Label = reportparams[i,0];
parameters[i].Name = reportparams[i, 0];
parameters[i].Value = reportparams[i, 1];
}
}
rsExec.SetExecutionParameters(parameters, "en-us");
results = rsExec.Render(format, deviceInfo,
out extension, out encoding,
out mimeType, out warnings, out streamIDs);
// Create a file stream and write the report to it
using (FileStream stream = System.IO.File.OpenWrite(filename))
{
stream.Write(results, 0, results.Length);
}
successful = true;
return successful;
}
Any ideas why I'm now unable to set parameters? The report generation works without issue if parameters aren't required.
Looks like it may have been an issue with how reporting services passes parameters through to the stored procedure providing the data. A string guid was being passed through to the report and the stored procedure expected a varchar guid. I suspect reporting services may have been noticing the string followed the guid format pattern and so passed it through as a uniqueidentifier to the stored procedure.
I changed the data source for the report from "stored procedure" to "text" and set the SQL as "EXEC pMyStoredOProcName #guid".
Please note the guid being passed in as a string to the stored procedure is probably not best practice... I was simply debugging an issue with another developers code.
Parameter _reportName cannot be null or empty. The [CLASSNAME].[METHODNAME]() reflection API could not create and return the SrsReportNameAttribute object
In this specific case it looks like an earlier full compile did not finish.
If you encounter this problem I would suggest that you first compile the class mentioned in the error message and see if this solves the problem.
go to AOT (get Ctrl+D)
in classes find CLASSNAME
3.compile it (F7)