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authorLoïc Collignon <loic.collignon@iot.bzh>2019-02-27 17:44:37 +0100
committerLoïc Collignon <loic.collignon@iot.bzh>2019-03-11 13:40:54 +0100
commit85a5bd0a1ac34dbe30bc06f667ec27bac3cf6724 (patch)
treeb19040bde5475382d8178044f39e245a95f5bae2 /bindings/tutorial/tuto-5.cpp
parenta5143cea54e70859269556277353ceafedfa8895 (diff)
c++: Add tutorial tuto-5 for C++ class base_api_t
Added the tuto-5 that show how to benefit from the new 'binding-object' header and its new class 'base_api_t'. Change-Id: I81e6fd8dc5899b8e93d75530d902c0e12fba72a9 Signed-off-by: Loïc Collignon <loic.collignon@iot.bzh>
Diffstat (limited to 'bindings/tutorial/tuto-5.cpp')
-rw-r--r--bindings/tutorial/tuto-5.cpp93
1 files changed, 93 insertions, 0 deletions
diff --git a/bindings/tutorial/tuto-5.cpp b/bindings/tutorial/tuto-5.cpp
new file mode 100644
index 00000000..458ae7b5
--- /dev/null
+++ b/bindings/tutorial/tuto-5.cpp
@@ -0,0 +1,93 @@
+#include <afb/c++/binding>
+#include <json-c/json.h>
+#include <string.h>
+
+class tuto5
+ : public afb::base_api_t<tuto5>
+{
+private:
+ afb::event event_login;
+ afb::event event_logout;
+
+public:
+ void login(afb::req req)
+ {
+ json_object *user, *passwd;
+
+ json_object* args = req.json();
+ if (!json_object_object_get_ex(args, "user", &user)
+ || !json_object_object_get_ex(args, "password", &passwd)) {
+ AFB_REQ_ERROR(req, "login, bad request: %s", json_object_get_string(args));
+ req.fail("bad-request");
+ } else if (afb_req_context_get(req)) {
+ AFB_REQ_ERROR(req, "login, bad state, logout first");
+ req.fail("bad-state");
+ } else if (std::string(json_object_get_string(passwd)) != std::string("please")) {
+ AFB_REQ_ERROR(req, "login, unauthorized: %s", json_object_get_string(args));
+ req.fail("unauthorized");
+ } else {
+ char* username = strdup(json_object_get_string(user));
+ AFB_REQ_NOTICE(req, "login user: %s", username);
+ req.session_set_LOA(1);
+ afb_req_context_set(req, username, free);
+ req.success();
+ event_login.push(json_object_new_string(username));
+ }
+ }
+
+ void action(afb::req req) const
+ {
+ json_object* val;
+ json_object* args = req.json();
+ char* username = reinterpret_cast<char*>(afb_req_context_get(req));
+ AFB_REQ_NOTICE(req, "action for user %s: %s", username, json_object_get_string(args));
+ if (json_object_object_get_ex(args, "subscribe", &val)) {
+ if (json_object_get_boolean(val)) {
+ AFB_REQ_NOTICE(req, "user %s subscribes to events", username);
+ req.subscribe(event_login);
+ req.subscribe(event_logout);
+ } else {
+ AFB_REQ_NOTICE(req, "user %s unsubscribes to events", username);
+ req.unsubscribe(event_login);
+ req.unsubscribe(event_logout);
+ }
+ }
+ req.success(json_object_get(args));
+ }
+
+ void logout(afb::req req)
+ {
+ char* username = reinterpret_cast<char*>(afb_req_context_get(req));
+ AFB_REQ_NOTICE(req, "login user %s out", username);
+ event_logout.push(json_object_new_string(username));
+ req.session_set_LOA(0);
+ afb_req_context_clear(req);
+ req.success();
+ }
+
+ int preinit(afb_api_t h) override
+ {
+ return !(
+ (add_verb<&tuto5::login>("login", "log in the system") == 0) &&
+ (add_verb<&tuto5::action>("action", "perform an action", nullptr, nullptr, AFB_SESSION_LOA_1) == 0) &&
+ (add_verb<&tuto5::logout>("logout", "log out the system", nullptr, nullptr, AFB_SESSION_LOA_1) == 0)
+ );
+ }
+
+ int init() override
+ {
+ AFB_API_NOTICE(api_, "init");
+ event_login = make_event("login");
+ event_logout = make_event("logout");
+ if (event_login.is_valid() && event_logout.is_valid())
+ return 0;
+ AFB_API_ERROR(api_, "Can't create events");
+ return -1;
+ }
+};
+
+int afbBindingEntry(afb_api_t h)
+{
+ afb::new_api<tuto5>(h, "tuto-5", "fifth tutorial: C++");
+ return 0;
+}