bindings/tutorials/tuto-5.cpp

   1 #include <afb/c++/binding>
   2 #include <json-c/json.h>
   3 #include <string.h>
   4
   5 class tuto5
   6         : public afb::base_api_t<tuto5>
   7 {
   8 private:
   9         afb::event event_login;
  10         afb::event event_logout;
  11
  12 public:
  13         void login(afb::req req)
  14         {
  15                 json_object *user, *passwd;
  16
  17                 json_object* args = req.json();
  18                 if (!json_object_object_get_ex(args, "user", &user)
  19                 || !json_object_object_get_ex(args, "password", &passwd)) {
  20                         AFB_REQ_ERROR(req, "login, bad request: %s", json_object_get_string(args));
  21                         req.fail("bad-request");
  22                 } else if (afb_req_context_get(req)) {
  23                         AFB_REQ_ERROR(req, "login, bad state, logout first");
  24                         req.fail("bad-state");
  25                 } else if (std::string(json_object_get_string(passwd)) != std::string("please")) {
  26                         AFB_REQ_ERROR(req, "login, unauthorized: %s", json_object_get_string(args));
  27                         req.fail("unauthorized");
  28                 } else {
  29                         char* username = strdup(json_object_get_string(user));
  30                         AFB_REQ_NOTICE(req, "login user: %s", username);
  31                         req.session_set_LOA(1);
  32                         afb_req_context_set(req, username, free);
  33                         req.success();
  34                         event_login.push(json_object_new_string(username));
  35                 }
  36         }
  37
  38         void action(afb::req req) const
  39         {
  40                 json_object* val;
  41                 json_object* args = req.json();
  42                 char* username = reinterpret_cast<char*>(afb_req_context_get(req));
  43                 AFB_REQ_NOTICE(req, "action for user %s: %s", username, json_object_get_string(args));
  44                 if (json_object_object_get_ex(args, "subscribe", &val)) {
  45                         if (json_object_get_boolean(val)) {
  46                                 AFB_REQ_NOTICE(req, "user %s subscribes to events", username);
  47                                 req.subscribe(event_login);
  48                                 req.subscribe(event_logout);
  49                         } else {
  50                                 AFB_REQ_NOTICE(req, "user %s unsubscribes to events", username);
  51                                 req.unsubscribe(event_login);
  52                                 req.unsubscribe(event_logout);
  53                         }
  54                 }
  55                 req.success(json_object_get(args));
  56         }
  57
  58         void logout(afb::req req)
  59         {
  60                 char* username = reinterpret_cast<char*>(afb_req_context_get(req));
  61                 AFB_REQ_NOTICE(req, "login user %s out", username);
  62                 event_logout.push(json_object_new_string(username));
  63                 req.session_set_LOA(0);
  64                 afb_req_context_clear(req);
  65                 req.success();
  66         }
  67
  68         int preinit(afb_api_t h) override
  69         {
  70                 return !(
  71                         (add_verb<&tuto5::login>("login", "log in the system") == 0) &&
  72                         (add_verb<&tuto5::action>("action", "perform an action", nullptr, nullptr, AFB_SESSION_LOA_1) == 0) &&
  73                         (add_verb<&tuto5::logout>("logout", "log out the system", nullptr, nullptr, AFB_SESSION_LOA_1) == 0)
  74                 );
  75         }
  76
  77         int init() override
  78         {
  79                 AFB_API_NOTICE(api_, "init");
  80                 event_login = make_event("login");
  81                 event_logout = make_event("logout");
  82                 if (event_login.is_valid() && event_logout.is_valid())
  83                         return 0;
  84                 AFB_API_ERROR(api_, "Can't create events");
  85                 return -1;
  86         }
  87 };
  88
  89 int afbBindingEntry(afb_api_t h)
  90 {
  91         afb::new_api<tuto5>(h, "tuto-5", "fifth tutorial: C++");
  92         return 0;
  93 }