restserver.cpp

This example can be found in Development\examples\cpp\restserver\restserver.cpp.

This example shows how to enable the REST server using the PST SDK. The REST server enables network-based access to the PST Tracker using the HTTP protocol. GET and POST requests can be made to the server to send and receive data and change parameters. The REST interface offers a programming language independent interface to the PST Tracker. Besides accessing the REST server directly using a browser, a networking library like Curl can be used to interface with the server programatically.

When compiling and running this example, please make sure that the required dependencies can be found by the executable (e.g. by copying the Development\Redist directory into the build directory). On Windows, the Visual Studio project files are configured to use a relative path to the Development\Redist directory as the working directory. If the examples have been copied, please ensure the working directory is still valid.

 
#ifdef WIN32
#include <windows.h>
#else
#include <csignal>
#endif
 
/*
 * Define handler functions required to ensure a clean shutdown of the PST Tracker
 * when the application is terminated.
 */
 
static void Exithandler(int sig);
 
#ifdef WIN32
BOOL WINAPI ConsoleHandler(DWORD CEvent)
{
    Exithandler(CEvent);
    return TRUE;
}
#endif
 
/* End of handler functions */
 
#include <iostream>
#include <thread>
#include <chrono>
 
#include "pstsdk_cpp.h"
#include "TrackerExceptions.h"
 
/*
 * Implement the exit handler to shut-down the PST Tracker connection on application termination.
 */
static void Exithandler(int sig)
{
    PSTech::pstsdk::Tracker::DisableRestServer();
    PSTech::pstsdk::Tracker::Shutdown();
    exit(0);
}
 
int main(int argc, char *argv[])
{
    // Register the exit handler with the application
#ifdef WIN32
    SetConsoleCtrlHandler((PHANDLER_ROUTINE)ConsoleHandler, TRUE);
#else
    signal(SIGTERM, Exithandler);
    signal(SIGKILL, Exithandler);
    signal(SIGQUIT, Exithandler);
    signal(SIGINT, Exithandler);
#endif
 
    // Implement error handling of PSTech::TrackerException exceptions to prevent 
    // improper PST Tracker shutdown on errors.
    try
    {
        // Create an instance of the Tracker object using the default configuration path and file names.
#ifdef WIN32
        PSTech::pstsdk::Tracker pst;
#else
        // On Linux, specify the type of grabber that needs to be used as the last parameter: 
        // "basler_ace" for PST HD or "basler_dart" for PST Pico
        PSTech::pstsdk::Tracker pst("","config.cfg","models.db",argv[1]);
#endif
 
        // Start the tracker server.
        pst.Start();
 
        // Enable the REST server. To check if the REST server is started correctly, browse to 
        // http://localhost:7278/PSTapi/SystemCheck
        // In order to use 127.0.0.1 an an address on Windows 7, execute the following command 
        // on an elevated command prompt to allow communication to this address:
        // "netsh http add urlacl url=http://127.0.0.1:7278/ user=EVERYONE listen=yes delegate=no"
        pst.EnableRestServer("localhost", "7278");
 
        std::cout << "PST REST server enabled. See the PST SDK Manual for example commands.\n";
 
        // Wait for one minute before terminating this application.
        std::this_thread::sleep_for(std::chrono::milliseconds(60000));
 
        // Disable the REST server
        pst.DisableRestServer();
    }
    catch (PSTech::TrackerException &e)
    {
        std::cout << e.full_description() << "\n";
        // Handle the error.
    }
 
    // Make sure that the connection to the PST Tracker is shut down properly.
    PSTech::pstsdk::Tracker::Shutdown();
 
    return 0;
}