2 * Copyright (C) 2016 "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-msg-json.h"
35 #include "afb-context.h"
37 #include "afb-subcall.h"
40 /* predeclaration of structures */
44 /* predeclaration of websocket callbacks */
45 static void aws_on_hangup(struct afb_ws_json1 *ws, struct afb_wsj1 *wsj1);
46 static void aws_on_call(struct afb_ws_json1 *ws, const char *api, const char *verb, struct afb_wsj1_msg *msg);
47 static void aws_on_event(struct afb_ws_json1 *ws, const char *event, int eventid, struct json_object *object);
49 /* predeclaration of wsreq callbacks */
50 static void wsreq_addref(struct afb_wsreq *wsreq);
51 static void wsreq_unref(struct afb_wsreq *wsreq);
52 static struct json_object *wsreq_json(struct afb_wsreq *wsreq);
53 static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name);
54 static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info);
55 static void wsreq_success(struct afb_wsreq *wsreq, struct json_object *obj, const char *info);
56 static const char *wsreq_raw(struct afb_wsreq *wsreq, size_t *size);
57 static void wsreq_send(struct afb_wsreq *wsreq, const char *buffer, size_t size);
58 static int wsreq_subscribe(struct afb_wsreq *wsreq, struct afb_event event);
59 static int wsreq_unsubscribe(struct afb_wsreq *wsreq, struct afb_event event);
60 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);
62 /* declaration of websocket structure */
66 void (*cleanup)(void*);
67 void *cleanup_closure;
68 struct AFB_clientCtx *session;
69 struct afb_evt_listener *listener;
70 struct afb_wsj1 *wsj1;
74 /* declaration of wsreq structure */
78 * CAUTION: 'context' field should be the first because there
79 * is an implicit convertion to struct afb_context
81 struct afb_context context;
83 struct afb_ws_json1 *aws;
84 struct afb_wsreq *next;
85 struct afb_wsj1_msg *msgj1;
88 /* interface for afb_ws_json1 / afb_wsj1 */
89 static struct afb_wsj1_itf wsj1_itf = {
90 .on_hangup = (void*)aws_on_hangup,
91 .on_call = (void*)aws_on_call
94 /* interface for wsreq / afb_req */
95 const struct afb_req_itf afb_ws_json1_req_itf = {
96 .json = (void*)wsreq_json,
97 .get = (void*)wsreq_get,
98 .success = (void*)wsreq_success,
99 .fail = (void*)wsreq_fail,
100 .raw = (void*)wsreq_raw,
101 .send = (void*)wsreq_send,
102 .context_get = (void*)afb_context_get,
103 .context_set = (void*)afb_context_set,
104 .addref = (void*)wsreq_addref,
105 .unref = (void*)wsreq_unref,
106 .session_close = (void*)afb_context_close,
107 .session_set_LOA = (void*)afb_context_change_loa,
108 .subscribe = (void*)wsreq_subscribe,
109 .unsubscribe = (void*)wsreq_unsubscribe,
110 .subcall = (void*)wsreq_subcall
113 /* the interface for events */
114 static const struct afb_evt_itf evt_itf = {
115 .broadcast = (void*)aws_on_event,
116 .push = (void*)aws_on_event
119 /***************************************************************
120 ****************************************************************
122 ** functions of afb_ws_json1 / afb_wsj1
124 ****************************************************************
125 ***************************************************************/
127 struct afb_ws_json1 *afb_ws_json1_create(int fd, struct afb_context *context, void (*cleanup)(void*), void *cleanup_closure)
129 struct afb_ws_json1 *result;
132 assert(context != NULL);
134 result = malloc(sizeof * result);
138 result->refcount = 1;
139 result->cleanup = cleanup;
140 result->cleanup_closure = cleanup_closure;
141 result->session = ctxClientAddRef(context->session);
142 result->new_session = context->created != 0;
143 if (result->session == NULL)
146 result->wsj1 = afb_wsj1_create(fd, &wsj1_itf, result);
147 if (result->wsj1 == NULL)
150 result->listener = afb_evt_listener_create(&evt_itf, result);
151 if (result->listener == NULL)
157 afb_wsj1_unref(result->wsj1);
159 ctxClientUnref(result->session);
167 static struct afb_ws_json1 *aws_addref(struct afb_ws_json1 *ws)
173 static void aws_unref(struct afb_ws_json1 *ws)
175 if (--ws->refcount == 0) {
176 afb_evt_listener_unref(ws->listener);
177 afb_wsj1_unref(ws->wsj1);
178 if (ws->cleanup != NULL)
179 ws->cleanup(ws->cleanup_closure);
180 ctxClientUnref(ws->session);
185 static void aws_on_hangup(struct afb_ws_json1 *ws, struct afb_wsj1 *wsj1)
190 static void aws_on_call(struct afb_ws_json1 *ws, const char *api, const char *verb, struct afb_wsj1_msg *msg)
193 struct afb_wsreq *wsreq;
195 DEBUG("received websocket request for %s/%s: %s", api, verb, afb_wsj1_msg_object_s(msg));
198 wsreq = calloc(1, sizeof *wsreq);
200 afb_wsj1_close(ws->wsj1, 1008, NULL);
204 /* init the context */
205 afb_context_init(&wsreq->context, ws->session, afb_wsj1_msg_token(msg));
206 if (!wsreq->context.invalidated)
207 wsreq->context.validated = 1;
208 if (ws->new_session != 0) {
209 wsreq->context.created = 1;
213 /* fill and record the request */
214 afb_wsj1_msg_addref(msg);
217 wsreq->aws = aws_addref(ws);
221 r.itf = &afb_ws_json1_req_itf;
222 afb_apis_call_(r, &wsreq->context, api, verb);
226 static void aws_on_event(struct afb_ws_json1 *aws, const char *event, int eventid, struct json_object *object)
228 afb_wsj1_send_event_j(aws->wsj1, event, afb_msg_json_event(event, object));
231 /***************************************************************
232 ****************************************************************
234 ** functions of wsreq / afb_req
236 ****************************************************************
237 ***************************************************************/
239 static void wsreq_addref(struct afb_wsreq *wsreq)
244 static void wsreq_unref(struct afb_wsreq *wsreq)
246 if (--wsreq->refcount == 0) {
247 afb_context_disconnect(&wsreq->context);
248 afb_wsj1_msg_unref(wsreq->msgj1);
249 aws_unref(wsreq->aws);
254 static struct json_object *wsreq_json(struct afb_wsreq *wsreq)
256 return afb_wsj1_msg_object_j(wsreq->msgj1);
259 static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name)
261 return afb_msg_json_get_arg(wsreq_json(wsreq), name);
264 static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info)
267 rc = afb_wsj1_reply_error_j(wsreq->msgj1, afb_msg_json_reply_error(status, info, &wsreq->context, NULL), afb_context_sent_token(&wsreq->context));
269 ERROR("Can't send fail reply: %m");
272 static void wsreq_success(struct afb_wsreq *wsreq, json_object *obj, const char *info)
275 rc = afb_wsj1_reply_ok_j(wsreq->msgj1, afb_msg_json_reply_ok(info, obj, &wsreq->context, NULL), afb_context_sent_token(&wsreq->context));
277 ERROR("Can't send success reply: %m");
280 static const char *wsreq_raw(struct afb_wsreq *wsreq, size_t *size)
282 const char *result = afb_wsj1_msg_object_s(wsreq->msgj1);
284 *size = strlen(result);
288 static void wsreq_send(struct afb_wsreq *wsreq, const char *buffer, size_t size)
291 rc = afb_wsj1_reply_ok_s(wsreq->msgj1, buffer, afb_context_sent_token(&wsreq->context));
293 ERROR("Can't send raw reply: %m");
296 static int wsreq_subscribe(struct afb_wsreq *wsreq, struct afb_event event)
298 return afb_evt_add_watch(wsreq->aws->listener, event);
301 static int wsreq_unsubscribe(struct afb_wsreq *wsreq, struct afb_event event)
303 return afb_evt_remove_watch(wsreq->aws->listener, event);
306 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)
308 afb_subcall(&wsreq->context, api, verb, args, callback, closure, (struct afb_req){ .itf = &afb_ws_json1_req_itf, .closure = wsreq });