2 * Copyright (C) 2015-2018 "IoT.bzh"
3 * Author "Fulup Ar Foll"
4 * Author José Bollo <jose.bollo@iot.bzh>
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
28 #include <sys/types.h>
31 #include <systemd/sd-event.h>
32 #include <json-c/json.h>
35 #include "afb-ws-client.h"
36 #include "afb-proto-ws.h"
38 /* declaration of functions */
39 static void on_wsj1_hangup(void *closure, struct afb_wsj1 *wsj1);
40 static void on_wsj1_call(void *closure, const char *api, const char *verb, struct afb_wsj1_msg *msg);
41 static void on_wsj1_event(void *closure, const char *event, struct afb_wsj1_msg *msg);
43 static void on_pws_hangup(void *closure);
44 static void on_pws_reply_success(void *closure, void *request, struct json_object *result, const char *info);
45 static void on_pws_reply_fail(void *closure, void *request, const char *status, const char *info);
46 static void on_pws_event_create(void *closure, const char *event_name, int event_id);
47 static void on_pws_event_remove(void *closure, const char *event_name, int event_id);
48 static void on_pws_event_subscribe(void *closure, void *request, const char *event_name, int event_id);
49 static void on_pws_event_unsubscribe(void *closure, void *request, const char *event_name, int event_id);
50 static void on_pws_event_push(void *closure, const char *event_name, int event_id, struct json_object *data);
51 static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data);
52 static void on_pws_subcall(void *closure, struct afb_proto_ws_subcall *subcall, void *request, const char *api, const char *verb, struct json_object *args);
54 static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, void *closure);
56 static void wsj1_emit(const char *api, const char *verb, const char *object);
57 static void pws_call(const char *verb, const char *object);
59 /* the callback interface for wsj1 */
60 static struct afb_wsj1_itf wsj1_itf = {
61 .on_hangup = on_wsj1_hangup,
62 .on_call = on_wsj1_call,
63 .on_event = on_wsj1_event
66 /* the callback interface for pws */
67 static struct afb_proto_ws_client_itf pws_itf = {
68 .on_reply_success = on_pws_reply_success,
69 .on_reply_fail = on_pws_reply_fail,
70 .on_event_create = on_pws_event_create,
71 .on_event_remove = on_pws_event_remove,
72 .on_event_subscribe = on_pws_event_subscribe,
73 .on_event_unsubscribe = on_pws_event_unsubscribe,
74 .on_event_push = on_pws_event_push,
75 .on_event_broadcast = on_pws_event_broadcast,
76 .on_subcall = on_pws_subcall,
79 /* global variables */
80 static struct afb_wsj1 *wsj1;
81 static struct afb_proto_ws *pws;
89 static sd_event_source *evsrc;
90 static char *sessionid = "afb-client-demo";
92 /* print usage of the program */
93 static void usage(int status, char *arg0)
95 char *name = strrchr(arg0, '/');
96 name = name ? name + 1 : arg0;
97 fprintf(status ? stderr : stdout, "usage: %s [-H [-r]] [-b] [-e] uri [api verb [data]]\n", name);
98 fprintf(status ? stderr : stdout, " %s -d [-H [-r]] [-b] [-e] uri [verb [data]]\n", name);
103 int main(int ac, char **av, char **env)
109 /* get the program name */
113 while (ac > 1 && av[1][0] == '-') {
114 if (av[1][1] == '-') {
117 if (!strcmp(av[1], "--human")) /* request for human output */
120 else if (!strcmp(av[1], "--raw")) /* request for raw output */
123 else if (!strcmp(av[1], "--direct")) /* request for direct api */
126 else if (!strcmp(av[1], "--break")) /* request to break connection */
129 else if (!strcmp(av[1], "--echo")) /* request to echo inputs */
132 /* emit usage and exit */
134 usage(!!strcmp(av[1], "--help"), a0);
136 /* short option(s) */
137 for (rc = 1 ; av[1][rc] ; rc++)
139 case 'H': human = 1; break;
140 case 'r': raw = 1; break;
141 case 'd': direct = 1; break;
142 case 'b': breakcon = 1; break;
143 case 'e': echo = 1; break;
144 default: usage(av[1][rc] != 'h', a0);
151 /* check the argument count */
152 if (ac != 2 && ac != 4 && ac != 5)
155 /* set raw by default */
159 /* get the default event loop */
160 rc = sd_event_default(&loop);
162 fprintf(stderr, "connection to default event loop failed: %s\n", strerror(-rc));
166 /* connect the websocket wsj1 to the uri given by the first argument */
168 pws = afb_ws_client_connect_api(loop, av[1], &pws_itf, NULL);
170 fprintf(stderr, "connection to %s failed: %m\n", av[1]);
173 afb_proto_ws_on_hangup(pws, on_pws_hangup);
175 wsj1 = afb_ws_client_connect_wsj1(loop, av[1], &wsj1_itf, NULL);
177 fprintf(stderr, "connection to %s failed: %m\n", av[1]);
182 /* test the behaviour */
184 /* get requests from stdin */
185 fcntl(0, F_SETFL, O_NONBLOCK);
186 sd_event_add_io(loop, &evsrc, 0, EPOLLIN, io_event_callback, NULL);
188 /* the request is defined by the arguments */
191 pws_call(av[2], av[3]);
193 wsj1_emit(av[2], av[3], av[4]);
198 sd_event_run(loop, 30000000);
202 /* decrement the count of calls */
203 static void dec_callcount()
206 if (exonrep && !callcount)
210 /* called when wsj1 hangsup */
211 static void on_wsj1_hangup(void *closure, struct afb_wsj1 *wsj1)
213 printf("ON-HANGUP\n");
218 /* called when wsj1 receives a method invocation */
219 static void on_wsj1_call(void *closure, const char *api, const char *verb, struct afb_wsj1_msg *msg)
223 printf("ON-CALL %s/%s(%s)\n", api, verb, afb_wsj1_msg_object_s(msg));
225 printf("ON-CALL %s/%s:\n%s\n", api, verb,
226 json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
227 JSON_C_TO_STRING_PRETTY));
229 rc = afb_wsj1_reply_error_s(msg, "\"unimplemented\"", NULL);
231 fprintf(stderr, "replying failed: %m\n");
234 /* called when wsj1 receives an event */
235 static void on_wsj1_event(void *closure, const char *event, struct afb_wsj1_msg *msg)
238 printf("ON-EVENT %s(%s)\n", event, afb_wsj1_msg_object_s(msg));
240 printf("ON-EVENT %s:\n%s\n", event,
241 json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
242 JSON_C_TO_STRING_PRETTY));
246 /* called when wsj1 receives a reply */
247 static void on_wsj1_reply(void *closure, struct afb_wsj1_msg *msg)
250 printf("ON-REPLY %s: %s\n", (char*)closure, afb_wsj1_msg_object_s(msg));
252 printf("ON-REPLY %s: %s\n%s\n", (char*)closure,
253 afb_wsj1_msg_is_reply_ok(msg) ? "OK" : "ERROR",
254 json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
255 JSON_C_TO_STRING_PRETTY));
262 static void wsj1_call(const char *api, const char *verb, const char *object)
268 /* allocates an id for the request */
269 rc = asprintf(&key, "%d:%s/%s", ++num, api, verb);
271 /* echo the command if asked */
273 printf("SEND-CALL %s/%s %s\n", api, verb, object?:"null");
275 /* send the request */
277 rc = afb_wsj1_call_s(wsj1, api, verb, object, on_wsj1_reply, key);
279 fprintf(stderr, "calling %s/%s(%s) failed: %m\n", api, verb, object);
285 static void wsj1_event(const char *event, const char *object)
289 /* echo the command if asked */
291 printf("SEND-EVENT: %s %s\n", event, object?:"null");
293 rc = afb_wsj1_send_event_s(wsj1, event, object);
295 fprintf(stderr, "sending !%s(%s) failed: %m\n", event, object);
298 /* emits either a call (when api!='!') or an event */
299 static void wsj1_emit(const char *api, const char *verb, const char *object)
301 if (object == NULL || object[0] == 0)
304 if (api[0] == '!' && api[1] == 0)
305 wsj1_event(verb, object);
307 wsj1_call(api, verb, object);
312 /* called when something happens on stdin */
313 static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, void *closure)
315 static size_t count = 0;
316 static char line[16384];
317 static char sep[] = " \t";
318 static char sepnl[] = " \t\n";
323 /* read the buffer */
324 do { rc = read(0, line + count, sizeof line - count); } while (rc < 0 && errno == EINTR);
326 fprintf(stderr, "read error: %m\n");
333 sd_event_source_unref(evsrc);
337 /* normalise the buffer content */
338 /* TODO: handle backspace \x7f ? */
340 /* process the lines */
343 size_t i, api[2], verb[2], rest[2];
345 while(i < count && strchr(sep, line[i])) i++;
346 api[0] = i; while(i < count && !strchr(sepnl, line[i])) i++; api[1] = i;
347 while(i < count && strchr(sep, line[i])) i++;
352 verb[0] = i; while(i < count && !strchr(sepnl, line[i])) i++; verb[1] = i;
353 while(i < count && strchr(sep, line[i])) i++;
355 rest[0] = i; while(i < count && line[i] != '\n') i++; rest[1] = i;
356 if (i == count) break;
358 if (api[0] == api[1]) {
360 } else if (line[api[0]] == '#') {
362 } else if (verb[0] == verb[1]) {
363 fprintf(stderr, "verb missing, bad line: %s\n", line+pos);
365 line[api[1]] = line[verb[1]] = 0;
367 pws_call(line + verb[0], line + rest[0]);
369 wsj1_emit(line + api[0], line + verb[0], line + rest[0]);
374 if (count == sizeof line) {
375 fprintf(stderr, "overflow\n");
379 memmove(line, line + pos, count);
383 static void on_pws_reply_success(void *closure, void *request, struct json_object *result, const char *info)
386 printf("ON-REPLY-SUCCESS %s: [%s] %s\n", (char*)request, info?:"", json_object_to_json_string(result));
388 printf("ON-REPLY-SUCCESS %s: %s\n%s\n", (char*)request, info?:"", json_object_to_json_string_ext(result, JSON_C_TO_STRING_PRETTY));
394 static void on_pws_reply_fail(void *closure, void *request, const char *status, const char *info)
396 printf("ON-REPLY-FAIL %s: %s [%s]\n", (char*)request, status?:"?", info?:"");
402 static void on_pws_event_create(void *closure, const char *event_name, int event_id)
404 printf("ON-EVENT-CREATE: [%d:%s]\n", event_id, event_name);
408 static void on_pws_event_remove(void *closure, const char *event_name, int event_id)
410 printf("ON-EVENT-REMOVE: [%d:%s]\n", event_id, event_name);
414 static void on_pws_event_subscribe(void *closure, void *request, const char *event_name, int event_id)
416 printf("ON-EVENT-SUBSCRIBE %s: [%d:%s]\n", (char*)request, event_id, event_name);
420 static void on_pws_event_unsubscribe(void *closure, void *request, const char *event_name, int event_id)
422 printf("ON-EVENT-UNSUBSCRIBE %s: [%d:%s]\n", (char*)request, event_id, event_name);
426 static void on_pws_event_push(void *closure, const char *event_name, int event_id, struct json_object *data)
429 printf("ON-EVENT-PUSH: [%d:%s] %s\n", event_id, event_name, json_object_to_json_string(data));
431 printf("ON-EVENT-PUSH: [%d:%s]\n%s\n", event_id, event_name, json_object_to_json_string_ext(data, JSON_C_TO_STRING_PRETTY));
435 static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data)
438 printf("ON-EVENT-BROADCAST: [%s] %s\n", event_name, json_object_to_json_string(data));
440 printf("ON-EVENT-BROADCAST: [%s]\n%s\n", event_name, json_object_to_json_string_ext(data, JSON_C_TO_STRING_PRETTY));
444 static void on_pws_subcall(void *closure, struct afb_proto_ws_subcall *subcall, void *request, const char *api, const char *verb, struct json_object *args)
447 printf("ON-SUBCALL %s: %s/%s %s\n", (char*)request, api, verb, json_object_to_json_string(args));
449 printf("ON-SUBCALL %s: %s/%s\n%s\n", (char*)request, api, verb, json_object_to_json_string_ext(args, JSON_C_TO_STRING_PRETTY));
450 afb_proto_ws_subcall_reply(subcall, 1, NULL);
455 static void pws_call(const char *verb, const char *object)
460 struct json_object *o;
462 /* allocates an id for the request */
463 rc = asprintf(&key, "%d:%s", ++num, verb);
465 /* echo the command if asked */
467 printf("SEND-CALL: %s %s\n", verb, object?:"null");
469 /* send the request */
471 if (object == NULL || object[0] == 0 || !strcmp(object, "null"))
474 o = json_tokener_parse(object);
476 o = json_object_new_string(object);
478 rc = afb_proto_ws_client_call(pws, verb, o, sessionid, key);
481 fprintf(stderr, "calling %s(%s) failed: %m\n", verb, object?:"");
488 /* called when pws hangsup */
489 static void on_pws_hangup(void *closure)
491 printf("ON-HANGUP\n");