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"
37 #include "afb-context.h"
39 #include "afb-subcall.h"
42 /* predeclaration of structures */
46 /* predeclaration of websocket callbacks */
47 static void aws_on_hangup(struct afb_ws_json1 *ws, struct afb_wsj1 *wsj1);
48 static void aws_on_call(struct afb_ws_json1 *ws, const char *api, const char *verb, struct afb_wsj1_msg *msg);
49 static void aws_on_event(struct afb_ws_json1 *ws, const char *event, int eventid, struct json_object *object);
51 /* predeclaration of wsreq callbacks */
52 static void wsreq_destroy(struct afb_wsreq *wsreq);
53 static struct json_object *wsreq_json(struct afb_wsreq *wsreq);
54 static void wsreq_reply(struct afb_wsreq *wsreq, int iserror, json_object *obj);
56 /* declaration of websocket structure */
60 void (*cleanup)(void*);
61 void *cleanup_closure;
62 struct afb_session *session;
63 struct afb_evt_listener *listener;
64 struct afb_wsj1 *wsj1;
68 /* declaration of wsreq structure */
72 struct afb_ws_json1 *aws;
73 struct afb_wsreq *next;
74 struct afb_wsj1_msg *msgj1;
77 /* interface for afb_ws_json1 / afb_wsj1 */
78 static struct afb_wsj1_itf wsj1_itf = {
79 .on_hangup = (void*)aws_on_hangup,
80 .on_call = (void*)aws_on_call
83 /* interface for xreq */
84 const struct afb_xreq_query_itf afb_ws_json1_xreq_itf = {
85 .json = (void*)wsreq_json,
86 .reply = (void*)wsreq_reply,
87 .unref = (void*)wsreq_destroy
90 /* the interface for events */
91 static const struct afb_evt_itf evt_itf = {
92 .broadcast = (void*)aws_on_event,
93 .push = (void*)aws_on_event
96 /***************************************************************
97 ****************************************************************
99 ** functions of afb_ws_json1 / afb_wsj1
101 ****************************************************************
102 ***************************************************************/
104 struct afb_ws_json1 *afb_ws_json1_create(int fd, struct afb_context *context, void (*cleanup)(void*), void *cleanup_closure)
106 struct afb_ws_json1 *result;
109 assert(context != NULL);
111 result = malloc(sizeof * result);
115 result->refcount = 1;
116 result->cleanup = cleanup;
117 result->cleanup_closure = cleanup_closure;
118 result->session = afb_session_addref(context->session);
119 result->new_session = context->created != 0;
120 if (result->session == NULL)
123 result->wsj1 = afb_wsj1_create(afb_common_get_event_loop(), fd, &wsj1_itf, result);
124 if (result->wsj1 == NULL)
127 result->listener = afb_evt_listener_create(&evt_itf, result);
128 if (result->listener == NULL)
134 afb_wsj1_unref(result->wsj1);
136 afb_session_unref(result->session);
144 static struct afb_ws_json1 *aws_addref(struct afb_ws_json1 *ws)
150 static void aws_unref(struct afb_ws_json1 *ws)
152 if (--ws->refcount == 0) {
153 afb_evt_listener_unref(ws->listener);
154 afb_wsj1_unref(ws->wsj1);
155 if (ws->cleanup != NULL)
156 ws->cleanup(ws->cleanup_closure);
157 afb_session_unref(ws->session);
162 static void aws_on_hangup(struct afb_ws_json1 *ws, struct afb_wsj1 *wsj1)
167 static void aws_on_call(struct afb_ws_json1 *ws, const char *api, const char *verb, struct afb_wsj1_msg *msg)
169 struct afb_wsreq *wsreq;
171 DEBUG("received websocket request for %s/%s: %s", api, verb, afb_wsj1_msg_object_s(msg));
174 wsreq = calloc(1, sizeof *wsreq);
176 afb_wsj1_close(ws->wsj1, 1008, NULL);
180 /* init the context */
181 afb_context_init(&wsreq->xreq.context, ws->session, afb_wsj1_msg_token(msg));
182 if (!wsreq->xreq.context.invalidated)
183 wsreq->xreq.context.validated = 1;
184 if (ws->new_session != 0) {
185 wsreq->xreq.context.created = 1;
189 /* fill and record the request */
190 afb_wsj1_msg_addref(msg);
192 wsreq->xreq.refcount = 1;
193 wsreq->xreq.query = wsreq;
194 wsreq->xreq.queryitf = &afb_ws_json1_xreq_itf;
195 wsreq->xreq.api = api;
196 wsreq->xreq.verb = verb;
197 wsreq->aws = aws_addref(ws);
198 wsreq->xreq.listener = wsreq->aws->listener;
201 afb_apis_xcall(&wsreq->xreq);
202 afb_xreq_unref(&wsreq->xreq);
205 static void aws_on_event(struct afb_ws_json1 *aws, const char *event, int eventid, struct json_object *object)
207 afb_wsj1_send_event_j(aws->wsj1, event, afb_msg_json_event(event, object));
210 /***************************************************************
211 ****************************************************************
213 ** functions of wsreq / afb_req
215 ****************************************************************
216 ***************************************************************/
218 static void wsreq_destroy(struct afb_wsreq *wsreq)
220 afb_context_disconnect(&wsreq->xreq.context);
221 afb_wsj1_msg_unref(wsreq->msgj1);
222 aws_unref(wsreq->aws);
226 static struct json_object *wsreq_json(struct afb_wsreq *wsreq)
228 return afb_wsj1_msg_object_j(wsreq->msgj1);
231 static void wsreq_reply(struct afb_wsreq *wsreq, int iserror, json_object *obj)
234 rc = (iserror ? afb_wsj1_reply_error_j : afb_wsj1_reply_ok_j)(
235 wsreq->msgj1, obj, afb_context_sent_token(&wsreq->xreq.context));
237 ERROR("Can't send reply: %m (was %s)", json_object_get_string(obj));