aboutsummaryrefslogtreecommitdiffstats
path: root/bindings/samples/DemoContext.c
blob: cb8e86f0a972fb6ed770cb05582fe0254fff4c20 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
 * Copyright (C) 2015-2019 "IoT.bzh"
 * Author "Fulup Ar Foll"
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <json-c/json.h>

#define AFB_BINDING_VERSION 3
#include <afb/afb-binding.h>

typedef struct {
  /*
   * client context is attached a session but private to a each plugin.
   * Context is passed to each API under request->context
   *
   * Note:
   *  -client context is free when a session is closed. Developer should not
   *   forget that even if context is private to each plugin, session is unique
   *   to a client. When session close, every plugin are notified to free there
   *   private context.
   *  -by default standard "free" function from libc is used to free context.
   *   Developer may define it own under plugin->freeCB. This call received
   *   FreeCtxCb(void *ClientCtx, void*PluginHandle, char*SessionUUID) if
   *   FreeCtxCb=(void*)-1 then context wont be free by session manager.
   *  -when an API use AFB_SESSION_RESET this close the session and each plugin
   *   will be notified to free ressources.
   */

  int  count;
  char *abcd;

} MyClientContextT;

// This function is call at session open time. Any client trying to
// call it with an already open session will be denied.
// Ex: http://localhost:1234/api/context/create?token=123456789
static void myCreate (afb_req_t request)
{
    MyClientContextT *ctx = malloc (sizeof (MyClientContextT));

    // store something in our plugin private client context
    ctx->count = 0;
    ctx->abcd  = "SomeThingUseful";

    afb_req_context_set(request, ctx, free);
    afb_req_success_f(request, NULL, "SUCCESS: create client context for plugin [%s]", ctx->abcd);
}

// This function can only be called with a valid token. Token should be renew before
// session timeout a standard renew api is avaliable at /api/token/renew this API
// can be called automatically with <token-renew> HTML5 widget.
// ex: http://localhost:1234/api/context/action?token=xxxxxx-xxxxxx-xxxxx-xxxxx-xxxxxx
static void myAction (afb_req_t request)
{
    MyClientContextT *ctx = (MyClientContextT*) afb_req_context_get(request);

    if (!ctx) {
	afb_req_fail(request, "invalid-state", "Can't perform action");
	return;
    }
    // store something in our plugin private client context
    ctx->count++;
    afb_req_success_f(request, NULL, "SUCCESS: plugin [%s] Check=[%d]\n", ctx->abcd, ctx->count);
}

// After execution of this function, client session will be close and if they
// created a context [request->context != NULL] every plugins will be notified
// that they should free context resources.
// ex: http://localhost:1234/api/context/close?token=xxxxxx-xxxxxx-xxxxx-xxxxx-xxxxxx
static void myClose (afb_req_t request)
{
    MyClientContextT *ctx = (MyClientContextT*) afb_req_context_get(request);

    if (!ctx) {
        afb_req_success(request, NULL, NULL);
	return;
    }
    // store something in our plugin private client context
    ctx->count++;
    afb_req_success_f(request, NULL, "SUCCESS: plugin [%s] Close=[%d]\n", ctx->abcd, ctx->count);
}

// Set the LOA
static void setLOA(afb_req_t request, unsigned loa)
{
    if (afb_req_session_set_LOA(request, loa) >= 0)
	afb_req_success_f(request, NULL, "loa set to %u", loa);
    else
	afb_req_fail_f(request, "failed", "can't set loa to %u", loa);
}

static void clientSetLOA(afb_req_t request)
{
    setLOA(request, (unsigned)(intptr_t)request->vcbdata);
}

static void clientCheckLOA(afb_req_t request)
{
    afb_req_success(request, NULL, "LOA checked and okay");
}

// NOTE: this sample does not use session to keep test a basic as possible
//       in real application most APIs should be protected with AFB_SESSION_CHECK
static const struct afb_verb_v3 verbs[]= {
  {.verb="create", .session=AFB_SESSION_NONE, .callback=myCreate  , .info="Create a new session"},
  {.verb="action", .session=AFB_SESSION_CHECK , .callback=myAction  , .info="Use Session Context"},
  {.verb="close" , .session=AFB_SESSION_CLOSE , .callback=myClose   , .info="Free Context"},
  {.verb="set_loa_0", .session=AFB_SESSION_RENEW, .callback=clientSetLOA       ,.vcbdata=(void*)(intptr_t)0 ,.info="Set level of assurance to 0"},
  {.verb="set_loa_1", .session=AFB_SESSION_RENEW, .callback=clientSetLOA       ,.vcbdata=(void*)(intptr_t)1 ,.info="Set level of assurance to 1"},
  {.verb="set_loa_2", .session=AFB_SESSION_RENEW, .callback=clientSetLOA       ,.vcbdata=(void*)(intptr_t)2 ,.info="Set level of assurance to 2"},
  {.verb="set_loa_3", .session=AFB_SESSION_RENEW, .callback=clientSetLOA       ,.vcbdata=(void*)(intptr_t)3 ,.info="Set level of assurance to 3"},
  {.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"},
  {.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"},
  {.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"},
  {.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"},
  {0, 0, 0, 0, 0, 0, 0}
};

const struct afb_binding_v3 afbBindingV3 =
{
    .api   = "context",		/* the API name (or binding name or prefix) */
    .info  = "Sample of Client Context Usage",	/* short description of of the binding */
    .verbs = verbs	/* the array describing the verbs of the API */
};