2 * Copyright (C) 2015-2019 "IoT.bzh"
3 * Author "Fulup Ar Foll"
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
20 #include <json-c/json.h>
22 #define AFB_BINDING_VERSION 3
23 #include <afb/afb-binding.h>
27 * client context is attached a session but private to a each plugin.
28 * Context is passed to each API under request->context
31 * -client context is free when a session is closed. Developer should not
32 * forget that even if context is private to each plugin, session is unique
33 * to a client. When session close, every plugin are notified to free there
35 * -by default standard "free" function from libc is used to free context.
36 * Developer may define it own under plugin->freeCB. This call received
37 * FreeCtxCb(void *ClientCtx, void*PluginHandle, char*SessionUUID) if
38 * FreeCtxCb=(void*)-1 then context wont be free by session manager.
39 * -when an API use AFB_SESSION_RESET this close the session and each plugin
40 * will be notified to free ressources.
48 // This function is call at session open time. Any client trying to
49 // call it with an already open session will be denied.
50 // Ex: http://localhost:1234/api/context/create?token=123456789
51 static void myCreate (afb_req_t request)
53 MyClientContextT *ctx = malloc (sizeof (MyClientContextT));
55 // store something in our plugin private client context
57 ctx->abcd = "SomeThingUseful";
59 afb_req_context_set(request, ctx, free);
60 afb_req_success_f(request, NULL, "SUCCESS: create client context for plugin [%s]", ctx->abcd);
63 // This function can only be called with a valid token. Token should be renew before
64 // session timeout a standard renew api is avaliable at /api/token/renew this API
65 // can be called automatically with <token-renew> HTML5 widget.
66 // ex: http://localhost:1234/api/context/action?token=xxxxxx-xxxxxx-xxxxx-xxxxx-xxxxxx
67 static void myAction (afb_req_t request)
69 MyClientContextT *ctx = (MyClientContextT*) afb_req_context_get(request);
72 afb_req_fail(request, "invalid-state", "Can't perform action");
75 // store something in our plugin private client context
77 afb_req_success_f(request, NULL, "SUCCESS: plugin [%s] Check=[%d]\n", ctx->abcd, ctx->count);
80 // After execution of this function, client session will be close and if they
81 // created a context [request->context != NULL] every plugins will be notified
82 // that they should free context resources.
83 // ex: http://localhost:1234/api/context/close?token=xxxxxx-xxxxxx-xxxxx-xxxxx-xxxxxx
84 static void myClose (afb_req_t request)
86 MyClientContextT *ctx = (MyClientContextT*) afb_req_context_get(request);
89 afb_req_success(request, NULL, NULL);
92 // store something in our plugin private client context
94 afb_req_success_f(request, NULL, "SUCCESS: plugin [%s] Close=[%d]\n", ctx->abcd, ctx->count);
98 static void setLOA(afb_req_t request, unsigned loa)
100 if (afb_req_session_set_LOA(request, loa) >= 0)
101 afb_req_success_f(request, NULL, "loa set to %u", loa);
103 afb_req_fail_f(request, "failed", "can't set loa to %u", loa);
106 static void clientSetLOA(afb_req_t request)
108 setLOA(request, (unsigned)(intptr_t)request->vcbdata);
111 static void clientCheckLOA(afb_req_t request)
113 afb_req_success(request, NULL, "LOA checked and okay");
116 // NOTE: this sample does not use session to keep test a basic as possible
117 // in real application most APIs should be protected with AFB_SESSION_CHECK
118 static const struct afb_verb_v3 verbs[]= {
119 {.verb="create", .session=AFB_SESSION_NONE, .callback=myCreate , .info="Create a new session"},
120 {.verb="action", .session=AFB_SESSION_CHECK , .callback=myAction , .info="Use Session Context"},
121 {.verb="close" , .session=AFB_SESSION_CLOSE , .callback=myClose , .info="Free Context"},
122 {.verb="set_loa_0", .session=AFB_SESSION_RENEW, .callback=clientSetLOA ,.vcbdata=(void*)(intptr_t)0 ,.info="Set level of assurance to 0"},
123 {.verb="set_loa_1", .session=AFB_SESSION_RENEW, .callback=clientSetLOA ,.vcbdata=(void*)(intptr_t)1 ,.info="Set level of assurance to 1"},
124 {.verb="set_loa_2", .session=AFB_SESSION_RENEW, .callback=clientSetLOA ,.vcbdata=(void*)(intptr_t)2 ,.info="Set level of assurance to 2"},
125 {.verb="set_loa_3", .session=AFB_SESSION_RENEW, .callback=clientSetLOA ,.vcbdata=(void*)(intptr_t)3 ,.info="Set level of assurance to 3"},
126 {.verb="check_loa_ge_0", .session=AFB_SESSION_LOA_0, .callback=clientCheckLOA ,.vcbdata=(void*)(intptr_t)0 ,.info="Check whether level of assurance is greater or equal to 0"},
127 {.verb="check_loa_ge_1", .session=AFB_SESSION_LOA_1, .callback=clientCheckLOA ,.vcbdata=(void*)(intptr_t)1 ,.info="Check whether level of assurance is greater or equal to 1"},
128 {.verb="check_loa_ge_2", .session=AFB_SESSION_LOA_2, .callback=clientCheckLOA ,.vcbdata=(void*)(intptr_t)2 ,.info="Check whether level of assurance is greater or equal to 2"},
129 {.verb="check_loa_ge_3", .session=AFB_SESSION_LOA_3, .callback=clientCheckLOA ,.vcbdata=(void*)(intptr_t)3 ,.info="Check whether level of assurance is greater or equal to 3"},
130 {0, 0, 0, 0, 0, 0, 0}
133 const struct afb_binding_v3 afbBindingV3 =
135 .api = "context", /* the API name (or binding name or prefix) */
136 .info = "Sample of Client Context Usage", /* short description of of the binding */
137 .verbs = verbs /* the array describing the verbs of the API */