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>
29 #include "afb-ws-json1.h"
30 #include "afb-msg-json.h"
32 #include <afb/afb-req-itf.h>
34 #include "afb-context.h"
36 static void aws_on_hangup(struct afb_ws_json1 *ws);
37 static void aws_on_text(struct afb_ws_json1 *ws, char *text, size_t size);
39 static struct afb_ws_itf aws_itf = {
40 .on_hangup = (void*)aws_on_hangup,
41 .on_text = (void*)aws_on_text
48 void (*cleanup)(void*);
49 void *cleanup_closure;
50 struct afb_wsreq *requests;
51 struct AFB_clientCtx *session;
52 struct json_tokener *tokener;
57 static void aws_send_event(struct afb_ws_json1 *ws, const char *event, struct json_object *object);
59 static const struct afb_event_listener_itf event_listener_itf = {
60 .send = (void*)aws_send_event,
64 static inline struct afb_event_listener listener_for(struct afb_ws_json1 *aws)
66 return (struct afb_event_listener){ .itf = &event_listener_itf, .closure = aws };
69 struct afb_ws_json1 *afb_ws_json1_create(int fd, struct afb_context *context, void (*cleanup)(void*), void *cleanup_closure)
71 struct afb_ws_json1 *result;
74 assert(context != NULL);
76 result = malloc(sizeof * result);
80 result->cleanup = cleanup;
81 result->cleanup_closure = cleanup_closure;
82 result->requests = NULL;
83 result->session = ctxClientAddRef(context->session);
84 result->new_session = context->created != 0;
85 if (result->session == NULL)
88 result->tokener = json_tokener_new();
89 if (result->tokener == NULL)
92 result->ws = afb_ws_create(fd, &aws_itf, result);
93 if (result->ws == NULL)
96 if (0 > ctxClientEventListenerAdd(result->session, listener_for(result)))
102 afb_ws_destroy(result->ws);
104 json_tokener_free(result->tokener);
106 ctxClientUnref(result->session);
114 static void aws_on_hangup(struct afb_ws_json1 *ws)
116 ctxClientEventListenerRemove(ws->session, listener_for(ws));
117 afb_ws_destroy(ws->ws);
118 json_tokener_free(ws->tokener);
119 if (ws->cleanup != NULL)
120 ws->cleanup(ws->cleanup_closure);
121 ctxClientUnref(ws->session);
132 struct afb_context context;
134 struct afb_ws_json1 *aws;
135 struct afb_wsreq *next;
149 struct json_object *root;
152 static void wsreq_addref(struct afb_wsreq *wsreq);
153 static void wsreq_unref(struct afb_wsreq *wsreq);
154 static struct json_object *wsreq_json(struct afb_wsreq *wsreq);
155 static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name);
156 static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info);
157 static void wsreq_success(struct afb_wsreq *wsreq, struct json_object *obj, const char *info);
158 static const char *wsreq_raw(struct afb_wsreq *wsreq, size_t *size);
159 static void wsreq_send(struct afb_wsreq *wsreq, const char *buffer, size_t size);
162 static const struct afb_req_itf wsreq_itf = {
163 .json = (void*)wsreq_json,
164 .get = (void*)wsreq_get,
165 .success = (void*)wsreq_success,
166 .fail = (void*)wsreq_fail,
167 .raw = (void*)wsreq_raw,
168 .send = (void*)wsreq_send,
169 .context_get = (void*)afb_context_get,
170 .context_set = (void*)afb_context_set,
171 .addref = (void*)wsreq_addref,
172 .unref = (void*)wsreq_unref
175 static int aws_wsreq_parse(struct afb_wsreq *r, char *text, size_t size)
185 while(pos < end && *pos == ' ') pos++;
186 if (pos == end) goto bad_header;
187 if (*pos++ != '[') goto bad_header;
189 /* scans code: 2|3|4 */
190 while(pos < end && *pos == ' ') pos++;
191 if (pos == end) goto bad_header;
193 case '2': r->code = CALL; break;
194 case '3': r->code = RETOK; break;
195 case '4': r->code = RETERR; break;
196 default: goto bad_header;
200 while(pos < end && *pos == ' ') pos++;
201 if (pos == end) goto bad_header;
202 if (*pos++ != ',') goto bad_header;
205 while(pos < end && *pos == ' ') pos++;
206 if (pos == end) goto bad_header;
207 if (*pos++ != '"') goto bad_header;
209 while(pos < end && *pos != '"') pos++;
210 if (pos == end) goto bad_header;
211 r->idlen = (size_t)(pos++ - r->id);
214 while(pos < end && *pos == ' ') pos++;
215 if (pos == end) goto bad_header;
216 if (*pos++ != ',') goto bad_header;
218 /* scans the method if needed */
219 if (r->code == CALL) {
221 while(pos < end && *pos == ' ') pos++;
222 if (pos == end) goto bad_header;
223 if (*pos++ != '"') goto bad_header;
227 while(pos < end && *pos != '"' && *pos != '/') pos++;
228 if (pos == end) goto bad_header;
229 if (*pos != '/') goto bad_header;
230 r->apilen = (size_t)(pos++ - r->api);
231 if (r->apilen && r->api[r->apilen - 1] == '\\')
236 while(pos < end && *pos != '"') pos++;
237 if (pos == end) goto bad_header;
238 r->verblen = (size_t)(pos++ - r->verb);
241 while(pos < end && *pos == ' ') pos++;
242 if (pos == end) goto bad_header;
243 if (*pos++ != ',') goto bad_header;
247 while(pos < end && *pos == ' ') pos++;
248 if (pos == end) goto bad_header;
251 while (pos < end && (aux != 0 || (*pos != ',' && *pos != ']'))) {
252 if (pos == end) goto bad_header;
254 case '{': case '[': aux++; break;
255 case '}': case ']': if (!aux--) goto bad_header; break;
258 pos += 1 + (*pos == '\\');
259 } while(pos < end && *pos != '"');
265 if (pos > end) goto bad_header;
266 if (pos == end && aux != 0) goto bad_header;
268 r->objlen = (size_t)(pos++ - r->obj);
269 while (r->objlen && r->obj[r->objlen - 1] == ' ')
272 /* scan the token (if any) */
274 /* scans token: "token" */
275 while(pos < end && *pos == ' ') pos++;
276 if (pos == end) goto bad_header;
277 if (*pos++ != '"') goto bad_header;
279 while(pos < end && *pos != '"') pos++;
280 if (pos == end) goto bad_header;
281 r->toklen = (size_t)(pos++ - r->tok);
282 while(pos < end && *pos == ' ') pos++;
283 if (pos == end) goto bad_header;
288 if (c != ']') goto bad_header;
289 while(pos < end && *pos == ' ') pos++;
290 if (pos != end) goto bad_header;
301 static void aws_on_text(struct afb_ws_json1 *ws, char *text, size_t size)
304 struct afb_wsreq *wsreq;
307 wsreq = calloc(1, sizeof *wsreq);
312 if (!aws_wsreq_parse(wsreq, text, size))
315 /* fill and record the request */
316 if (wsreq->tok != NULL)
317 wsreq->tok[wsreq->toklen] = 0;
318 afb_context_init(&wsreq->context, ws->session, wsreq->tok);
319 if (!wsreq->context.invalidated)
320 wsreq->context.validated = 1;
321 if (ws->new_session != 0) {
322 wsreq->context.created = 1;
327 wsreq->next = ws->requests;
328 ws->requests = wsreq;
332 afb_apis_call(r, &wsreq->context, wsreq->api, wsreq->apilen, wsreq->verb, wsreq->verblen);
340 afb_ws_close(ws->ws, 1008, NULL);
344 static void wsreq_addref(struct afb_wsreq *wsreq)
349 static void wsreq_unref(struct afb_wsreq *wsreq)
351 if (--wsreq->refcount == 0) {
352 struct afb_wsreq **prv = &wsreq->aws->requests;
353 while(*prv != NULL) {
360 afb_context_disconnect(&wsreq->context);
361 json_object_put(wsreq->root);
367 static struct json_object *wsreq_json(struct afb_wsreq *wsreq)
369 struct json_object *root = wsreq->root;
371 json_tokener_reset(wsreq->aws->tokener);
372 root = json_tokener_parse_ex(wsreq->aws->tokener, wsreq->obj, (int)wsreq->objlen);
374 /* lazy error detection of json request. Is it to improve? */
375 root = json_object_new_string_len(wsreq->obj, (int)wsreq->objlen);
382 static struct afb_arg wsreq_get(struct afb_wsreq *wsreq, const char *name)
385 struct json_object *value, *root;
387 root = wsreq_json(wsreq);
388 if (json_object_object_get_ex(root, name, &value)) {
390 arg.value = json_object_get_string(value);
399 static void aws_emit(struct afb_ws_json1 *aws, int code, const char *id, size_t idlen, struct json_object *data, const char *token)
404 /* pack the message */
405 msg = json_object_new_array();
406 json_object_array_add(msg, json_object_new_int(code));
407 json_object_array_add(msg, json_object_new_string_len(id, (int)idlen));
408 json_object_array_add(msg, data);
410 json_object_array_add(msg, json_object_new_string(token));
412 /* emits the reply */
413 txt = json_object_to_json_string(msg);
414 afb_ws_text(aws->ws, txt, strlen(txt));
415 json_object_put(msg);
418 static void wsreq_reply(struct afb_wsreq *wsreq, int retcode, const char *status, const char *info, json_object *resp)
420 const char *uuid = afb_context_sent_uuid(&wsreq->context);
421 const char *token = afb_context_sent_token(&wsreq->context);
422 struct json_object *reply = afb_msg_json_reply(status, info, resp, token, uuid);
423 aws_emit(wsreq->aws, retcode, wsreq->id, wsreq->idlen, reply, token);
426 static void wsreq_fail(struct afb_wsreq *wsreq, const char *status, const char *info)
428 wsreq_reply(wsreq, RETERR, status, info, NULL);
431 static void wsreq_success(struct afb_wsreq *wsreq, json_object *obj, const char *info)
433 wsreq_reply(wsreq, RETOK, "success", info, obj);
436 static const char *wsreq_raw(struct afb_wsreq *wsreq, size_t *size)
438 *size = wsreq->objlen;
442 static void wsreq_send(struct afb_wsreq *wsreq, const char *buffer, size_t size)
444 afb_ws_text(wsreq->aws->ws, buffer, size);
447 static void aws_send_event(struct afb_ws_json1 *aws, const char *event, struct json_object *object)
449 aws_emit(aws, EVENT, event, strlen(event), afb_msg_json_event(event, object), NULL);