Run the example

  1. Install and run the device gateway
  2. Download the C++ client library
  3. Copy the root certificate of the gateway to your working directory. As default, the certificate(ca.crt) resides in cert of the installation directory.
  4. The example uses CMake. You can change the CMakeLists.txt file as needed.

  5. Change the gateway and the device information in example/server/test/main.cpp as needed.

     // the path of the root certificate
 const std::string GATEWAY_CA_FILE = "../cert/gateway/ca.crt";

 // the address of the gateway
 const std::string GATEWAY_ADDR = "192.168.0.2";
 const int GATEWAY_PORT = 4000;
    
 // the ip address of the target device
 const std::string DEVICE_IP = "192.168.0.110";
 const int DEVICE_PORT = 51211;
 const bool USE_SSL = false;

  6. Build and run.

    • Windows

      cmake .

      Open testServer.vcxproj in Visual Studio and build it.

      ./Debug/testServer

    • Linux

      cmake .
make testServer
./testServer

1. Connect to the gateway and the device

The example assumes you use the device gateway. For the master gateway or other connection options, refer to the Connect or ConnectMaster examples.

  auto gatewayClient = std::make_shared<GatewayClient>();
  gatewayClient->Connect(GATEWAY_ADDR, GATEWAY_PORT, GATEWAY_CA_FILE);

  ConnectSvc connectSvc(gatewayClient->GetChannel());

  ConnectInfo connInfo;
  connInfo.set_ipaddr(DEVICE_IP);
  connInfo.set_port(DEVICE_PORT);
  connInfo.set_usessl(USE_SSL);

  uint32_t deviceID = 0;
  connectSvc.Connect(connInfo, &deviceID);

2. Subscribe

To receive requests from devices, you have to configure the related options as described, first.

  AuthConfig testConfig;
  testConfig.CopyFrom(origConfig);
  testConfig.set_useservermatching(true);

  authSvc.SetConfig(deviceID, testConfig);

Then, you have to subscribe to the request channel.

  ClientContext context;
  auto reqReader(serverSvc.Subscribe(&context, QUEUE_SIZE));

3. Handle verification requests

With server matching enabled, the device will send a verification request to the gateway when it reads a card. You can implement your own logic and return its result to the device using HandleVerify.

  void handleVerify(ServerSvc& serverSvc, std::unique_ptr<ClientReader<ServerRequest>> reqReader) {
    ServerRequest req;

    while (reqReader->Read(&req)) {
      if(s_ReturnError) { // emulate authentication failure
        serverSvc.HandleVerify(req, ServerErrorCode::VERIFY_FAIL, NULL);
      } else { // emulate authentication success
        UserHdr hdr;
        hdr.set_id(TEST_USER_ID);
        hdr.set_numofcard(1);

        CSNCardData card;
        *card.mutable_data() = req.verifyreq().carddata();

        UserInfo userInfo;
        *userInfo.mutable_hdr() = hdr;
        *userInfo.add_cards() = card;

        serverSvc.HandleVerify(req, ServerErrorCode::SUCCESS, &userInfo);
      }
    }
  }

  auto serverThread(std::thread(handleVerify, std::ref(serverSvc), std::move(reqReader)));

4. Handle identification requests

With server matching enabled, the device will send an identification request to the gateway when it reads a fingerprint. You can implement your own logic and return its result to the device using HandleIdentify.

  void handleIdentify(ServerSvc& serverSvc, std::unique_ptr<ClientReader<ServerRequest>> reqReader) {
    ServerRequest req;

    while (reqReader->Read(&req)) {
      if(s_ReturnError) { // emulate authentication failure
        serverSvc.HandleIdentify(req, ServerErrorCode::IDENTIFY_FAIL, NULL);
      } else { // emulate authentication success 
        UserHdr hdr;
        hdr.set_id(TEST_USER_ID);
        hdr.set_numoffinger(1);

        FingerData finger;
        *finger.add_templates() = req.identifyreq().templatedata();
        *finger.add_templates() = req.identifyreq().templatedata();

        UserInfo userInfo;
        *userInfo.mutable_hdr() = hdr;
        *userInfo.add_fingers() = finger;

        serverSvc.HandleIdentify(req, ServerErrorCode::SUCCESS, &userInfo);
      }
    }

    std::cout << "Server thread is stopped" << std::endl;
    reqReader->Finish();
  }

  auto serverThread(std::thread(handleIdentify, std::ref(serverSvc), std::move(reqReader)));

Updated: