2 * Copyright (C) 2016, 2017 "IoT.bzh"
3 * Author: José Bollo <jose.bollo@iot.bzh>
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.
26 #include <json-c/json.h>
28 #include <afb/afb-req-itf.h>
31 #include "afb-ws-json1.h"
32 #include "afb-common.h"
33 #include "afb-msg-json.h"
34 #include "afb-session.h"
36 #include "afb-context.h"
38 #include "afb-subcall.h"
41 /* predeclaration of structures */
45 /* predeclaration of websocket callbacks */
46 static void aws_on_hangup(struct afb_ws_json1 *ws, struct afb_wsj1 *wsj1);
47 static void aws_on_call(struct afb_ws_json1 *ws, const char *api, const char *verb, struct afb_wsj1_msg *msg);
48 static void aws_on_event(struct afb_ws_json1 *ws, const char *event, int eventid, struct json_object *object);
50 /* predeclaration of wsreq callbacks */
51 static void wsreq_addref(struct afb_wsreq *wsreq);
52 static void wsreq_unref(struct afb_wsreq *wsreq);
53 static struct json_object *wsreq_json(struct afb_wsreq *wsreq);
54 static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name);
55 static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info);
56 static void wsreq_success(struct afb_wsreq *wsreq, struct json_object *obj, const char *info);
57 static const char *wsreq_raw(struct afb_wsreq *wsreq, size_t *size);
58 static void wsreq_send(struct afb_wsreq *wsreq, const char *buffer, size_t size);
59 static int wsreq_subscribe(struct afb_wsreq *wsreq, struct afb_event event);
60 static int wsreq_unsubscribe(struct afb_wsreq *wsreq, struct afb_event event);
61 static void wsreq_subcall(struct afb_wsreq *wsreq, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *closure);
63 /* declaration of websocket structure */
67 void (*cleanup)(void*);
68 void *cleanup_closure;
69 struct afb_session *session;
70 struct afb_evt_listener *listener;
71 struct afb_wsj1 *wsj1;
75 /* declaration of wsreq structure */
79 * CAUTION: 'context' field should be the first because there
80 * is an implicit convertion to struct afb_context
82 struct afb_context context;
84 struct afb_ws_json1 *aws;
85 struct afb_wsreq *next;
86 struct afb_wsj1_msg *msgj1;
89 /* interface for afb_ws_json1 / afb_wsj1 */
90 static struct afb_wsj1_itf wsj1_itf = {
91 .on_hangup = (void*)aws_on_hangup,
92 .on_call = (void*)aws_on_call
95 /* interface for wsreq / afb_req */
96 const struct afb_req_itf afb_ws_json1_req_itf = {
97 .json = (void*)wsreq_json,
98 .get = (void*)wsreq_get,
99 .success = (void*)wsreq_success,
100 .fail = (void*)wsreq_fail,
101 .raw = (void*)wsreq_raw,
102 .send = (void*)wsreq_send,
103 .context_get = (void*)afb_context_get,
104 .context_set = (void*)afb_context_set,
105 .addref = (void*)wsreq_addref,
106 .unref = (void*)wsreq_unref,
107 .session_close = (void*)afb_context_close,
108 .session_set_LOA = (void*)afb_context_change_loa,
109 .subscribe = (void*)wsreq_subscribe,
110 .unsubscribe = (void*)wsreq_unsubscribe,
111 .subcall = (void*)wsreq_subcall
114 /* the interface for events */
115 static const struct afb_evt_itf evt_itf = {
116 .broadcast = (void*)aws_on_event,
117 .push = (void*)aws_on_event
120 /***************************************************************
121 ****************************************************************
123 ** functions of afb_ws_json1 / afb_wsj1
125 ****************************************************************
126 ***************************************************************/
128 struct afb_ws_json1 *afb_ws_json1_create(int fd, struct afb_context *context, void (*cleanup)(void*), void *cleanup_closure)
130 struct afb_ws_json1 *result;
133 assert(context != NULL);
135 result = malloc(sizeof * result);
139 result->refcount = 1;
140 result->cleanup = cleanup;
141 result->cleanup_closure = cleanup_closure;
142 result->session = afb_session_addref(context->session);
143 result->new_session = context->created != 0;
144 if (result->session == NULL)
147 result->wsj1 = afb_wsj1_create(afb_common_get_event_loop(), fd, &wsj1_itf, result);
148 if (result->wsj1 == NULL)
151 result->listener = afb_evt_listener_create(&evt_itf, result);
152 if (result->listener == NULL)
158 afb_wsj1_unref(result->wsj1);
160 afb_session_unref(result->session);
168 static struct afb_ws_json1 *aws_addref(struct afb_ws_json1 *ws)
174 static void aws_unref(struct afb_ws_json1 *ws)
176 if (--ws->refcount == 0) {
177 afb_evt_listener_unref(ws->listener);
178 afb_wsj1_unref(ws->wsj1);
179 if (ws->cleanup != NULL)
180 ws->cleanup(ws->cleanup_closure);
181 afb_session_unref(ws->session);
186 static void aws_on_hangup(struct afb_ws_json1 *ws, struct afb_wsj1 *wsj1)
191 static void aws_on_call(struct afb_ws_json1 *ws, const char *api, const char *verb, struct afb_wsj1_msg *msg)
194 struct afb_wsreq *wsreq;
196 DEBUG("received websocket request for %s/%s: %s", api, verb, afb_wsj1_msg_object_s(msg));
199 wsreq = calloc(1, sizeof *wsreq);
201 afb_wsj1_close(ws->wsj1, 1008, NULL);
205 /* init the context */
206 afb_context_init(&wsreq->context, ws->session, afb_wsj1_msg_token(msg));
207 if (!wsreq->context.invalidated)
208 wsreq->context.validated = 1;
209 if (ws->new_session != 0) {
210 wsreq->context.created = 1;
214 /* fill and record the request */
215 afb_wsj1_msg_addref(msg);
218 wsreq->aws = aws_addref(ws);
222 r.itf = &afb_ws_json1_req_itf;
223 afb_apis_call(r, &wsreq->context, api, verb);
227 static void aws_on_event(struct afb_ws_json1 *aws, const char *event, int eventid, struct json_object *object)
229 afb_wsj1_send_event_j(aws->wsj1, event, afb_msg_json_event(event, object));
232 /***************************************************************
233 ****************************************************************
235 ** functions of wsreq / afb_req
237 ****************************************************************
238 ***************************************************************/
240 static void wsreq_addref(struct afb_wsreq *wsreq)
245 static void wsreq_unref(struct afb_wsreq *wsreq)
247 if (--wsreq->refcount == 0) {
248 afb_context_disconnect(&wsreq->context);
249 afb_wsj1_msg_unref(wsreq->msgj1);
250 aws_unref(wsreq->aws);
255 static struct json_object *wsreq_json(struct afb_wsreq *wsreq)
257 return afb_wsj1_msg_object_j(wsreq->msgj1);
260 static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name)
262 return afb_msg_json_get_arg(wsreq_json(wsreq), name);
265 static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info)
268 rc = afb_wsj1_reply_error_j(wsreq->msgj1, afb_msg_json_reply_error(status, info, &wsreq->context, NULL), afb_context_sent_token(&wsreq->context));
270 ERROR("Can't send fail reply: %m");
273 static void wsreq_success(struct afb_wsreq *wsreq, json_object *obj, const char *info)
276 rc = afb_wsj1_reply_ok_j(wsreq->msgj1, afb_msg_json_reply_ok(info, obj, &wsreq->context, NULL), afb_context_sent_token(&wsreq->context));
278 ERROR("Can't send success reply: %m");
281 static const char *wsreq_raw(struct afb_wsreq *wsreq, size_t *size)
283 const char *result = afb_wsj1_msg_object_s(wsreq->msgj1);
285 *size = strlen(result);
289 static void wsreq_send(struct afb_wsreq *wsreq, const char *buffer, size_t size)
292 rc = afb_wsj1_reply_ok_s(wsreq->msgj1, buffer, afb_context_sent_token(&wsreq->context));
294 ERROR("Can't send raw reply: %m");
297 static int wsreq_subscribe(struct afb_wsreq *wsreq, struct afb_event event)
299 return afb_evt_add_watch(wsreq->aws->listener, event);
302 static int wsreq_unsubscribe(struct afb_wsreq *wsreq, struct afb_event event)
304 return afb_evt_remove_watch(wsreq->aws->listener, event);
307 static void wsreq_subcall(struct afb_wsreq *wsreq, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *closure)
309 afb_subcall(&wsreq->context, api, verb, args, callback, closure, (struct afb_req){ .itf = &afb_ws_json1_req_itf, .closure = wsreq });