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);
99 fprintf(status ? stderr : stdout, "\n" \
100 "allowed options\n" \
101 " --break, -b Break connection just after event/call has been emitted.\n" \
102 " --direct, -d Direct api\n" \
103 " --echo, -e Echo inputs\n" \
104 " --help, -h Display this help\n" \
105 " --human, -H Display human readable JSON\n" \
106 " --raw, -r Raw output (default)\n" \
108 " %s --human 'localhost:1234/api?token=HELLO&uuid=magic' hello ping\n"
116 int main(int ac, char **av, char **env)
122 /* get the program name */
126 while (ac > 1 && av[1][0] == '-') {
127 if (av[1][1] == '-') {
130 if (!strcmp(av[1], "--human")) /* request for human output */
133 else if (!strcmp(av[1], "--raw")) /* request for raw output */
136 else if (!strcmp(av[1], "--direct")) /* request for direct api */
139 else if (!strcmp(av[1], "--break")) /* request to break connection */
142 else if (!strcmp(av[1], "--echo")) /* request to echo inputs */
145 /* emit usage and exit */
147 usage(!!strcmp(av[1], "--help"), a0);
149 /* short option(s) */
150 for (rc = 1 ; av[1][rc] ; rc++)
152 case 'H': human = 1; break;
153 case 'r': raw = 1; break;
154 case 'd': direct = 1; break;
155 case 'b': breakcon = 1; break;
156 case 'e': echo = 1; break;
157 default: usage(av[1][rc] != 'h', a0);
164 /* check the argument count */
165 if (ac != 2 && ac != 4 && ac != 5)
168 /* set raw by default */
172 /* get the default event loop */
173 rc = sd_event_default(&loop);
175 fprintf(stderr, "connection to default event loop failed: %s\n", strerror(-rc));
179 /* connect the websocket wsj1 to the uri given by the first argument */
181 pws = afb_ws_client_connect_api(loop, av[1], &pws_itf, NULL);
183 fprintf(stderr, "connection to %s failed: %m\n", av[1]);
186 afb_proto_ws_on_hangup(pws, on_pws_hangup);
188 wsj1 = afb_ws_client_connect_wsj1(loop, av[1], &wsj1_itf, NULL);
190 fprintf(stderr, "connection to %s failed: %m\n", av[1]);
195 /* test the behaviour */
197 /* get requests from stdin */
198 fcntl(0, F_SETFL, O_NONBLOCK);
199 sd_event_add_io(loop, &evsrc, 0, EPOLLIN, io_event_callback, NULL);
201 /* the request is defined by the arguments */
204 pws_call(av[2], av[3]);
206 wsj1_emit(av[2], av[3], av[4]);
211 sd_event_run(loop, 30000000);
215 /* decrement the count of calls */
216 static void dec_callcount()
219 if (exonrep && !callcount)
223 /* called when wsj1 hangsup */
224 static void on_wsj1_hangup(void *closure, struct afb_wsj1 *wsj1)
226 printf("ON-HANGUP\n");
231 /* called when wsj1 receives a method invocation */
232 static void on_wsj1_call(void *closure, const char *api, const char *verb, struct afb_wsj1_msg *msg)
236 printf("ON-CALL %s/%s(%s)\n", api, verb, afb_wsj1_msg_object_s(msg));
238 printf("ON-CALL %s/%s:\n%s\n", api, verb,
239 json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
240 JSON_C_TO_STRING_PRETTY));
242 rc = afb_wsj1_reply_error_s(msg, "\"unimplemented\"", NULL);
244 fprintf(stderr, "replying failed: %m\n");
247 /* called when wsj1 receives an event */
248 static void on_wsj1_event(void *closure, const char *event, struct afb_wsj1_msg *msg)
251 printf("ON-EVENT %s(%s)\n", event, afb_wsj1_msg_object_s(msg));
253 printf("ON-EVENT %s:\n%s\n", event,
254 json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
255 JSON_C_TO_STRING_PRETTY));
259 /* called when wsj1 receives a reply */
260 static void on_wsj1_reply(void *closure, struct afb_wsj1_msg *msg)
263 printf("ON-REPLY %s: %s\n", (char*)closure, afb_wsj1_msg_object_s(msg));
265 printf("ON-REPLY %s: %s\n%s\n", (char*)closure,
266 afb_wsj1_msg_is_reply_ok(msg) ? "OK" : "ERROR",
267 json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
268 JSON_C_TO_STRING_PRETTY));
275 static void wsj1_call(const char *api, const char *verb, const char *object)
281 /* allocates an id for the request */
282 rc = asprintf(&key, "%d:%s/%s", ++num, api, verb);
284 /* echo the command if asked */
286 printf("SEND-CALL %s/%s %s\n", api, verb, object?:"null");
288 /* send the request */
290 rc = afb_wsj1_call_s(wsj1, api, verb, object, on_wsj1_reply, key);
292 fprintf(stderr, "calling %s/%s(%s) failed: %m\n", api, verb, object);
298 static void wsj1_event(const char *event, const char *object)
302 /* echo the command if asked */
304 printf("SEND-EVENT: %s %s\n", event, object?:"null");
306 rc = afb_wsj1_send_event_s(wsj1, event, object);
308 fprintf(stderr, "sending !%s(%s) failed: %m\n", event, object);
311 /* emits either a call (when api!='!') or an event */
312 static void wsj1_emit(const char *api, const char *verb, const char *object)
314 if (object == NULL || object[0] == 0)
317 if (api[0] == '!' && api[1] == 0)
318 wsj1_event(verb, object);
320 wsj1_call(api, verb, object);
325 /* called when something happens on stdin */
326 static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, void *closure)
328 static size_t count = 0;
329 static char line[16384];
330 static char sep[] = " \t";
331 static char sepnl[] = " \t\n";
336 /* read the buffer */
337 do { rc = read(0, line + count, sizeof line - count); } while (rc < 0 && errno == EINTR);
339 fprintf(stderr, "read error: %m\n");
346 sd_event_source_unref(evsrc);
350 /* normalise the buffer content */
351 /* TODO: handle backspace \x7f ? */
353 /* process the lines */
356 size_t i, api[2], verb[2], rest[2];
358 while(i < count && strchr(sep, line[i])) i++;
359 api[0] = i; while(i < count && !strchr(sepnl, line[i])) i++; api[1] = i;
360 while(i < count && strchr(sep, line[i])) i++;
365 verb[0] = i; while(i < count && !strchr(sepnl, line[i])) i++; verb[1] = i;
366 while(i < count && strchr(sep, line[i])) i++;
368 rest[0] = i; while(i < count && line[i] != '\n') i++; rest[1] = i;
369 if (i == count) break;
371 if (api[0] == api[1]) {
373 } else if (line[api[0]] == '#') {
375 } else if (verb[0] == verb[1]) {
376 fprintf(stderr, "verb missing, bad line: %s\n", line+pos);
378 line[api[1]] = line[verb[1]] = 0;
380 pws_call(line + verb[0], line + rest[0]);
382 wsj1_emit(line + api[0], line + verb[0], line + rest[0]);
387 if (count == sizeof line) {
388 fprintf(stderr, "overflow\n");
392 memmove(line, line + pos, count);
396 static void on_pws_reply_success(void *closure, void *request, struct json_object *result, const char *info)
399 printf("ON-REPLY-SUCCESS %s: [%s] %s\n", (char*)request, info?:"", json_object_to_json_string(result));
401 printf("ON-REPLY-SUCCESS %s: %s\n%s\n", (char*)request, info?:"", json_object_to_json_string_ext(result, JSON_C_TO_STRING_PRETTY));
407 static void on_pws_reply_fail(void *closure, void *request, const char *status, const char *info)
409 printf("ON-REPLY-FAIL %s: %s [%s]\n", (char*)request, status?:"?", info?:"");
415 static void on_pws_event_create(void *closure, const char *event_name, int event_id)
417 printf("ON-EVENT-CREATE: [%d:%s]\n", event_id, event_name);
421 static void on_pws_event_remove(void *closure, const char *event_name, int event_id)
423 printf("ON-EVENT-REMOVE: [%d:%s]\n", event_id, event_name);
427 static void on_pws_event_subscribe(void *closure, void *request, const char *event_name, int event_id)
429 printf("ON-EVENT-SUBSCRIBE %s: [%d:%s]\n", (char*)request, event_id, event_name);
433 static void on_pws_event_unsubscribe(void *closure, void *request, const char *event_name, int event_id)
435 printf("ON-EVENT-UNSUBSCRIBE %s: [%d:%s]\n", (char*)request, event_id, event_name);
439 static void on_pws_event_push(void *closure, const char *event_name, int event_id, struct json_object *data)
442 printf("ON-EVENT-PUSH: [%d:%s] %s\n", event_id, event_name, json_object_to_json_string(data));
444 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));
448 static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data)
451 printf("ON-EVENT-BROADCAST: [%s] %s\n", event_name, json_object_to_json_string(data));
453 printf("ON-EVENT-BROADCAST: [%s]\n%s\n", event_name, json_object_to_json_string_ext(data, JSON_C_TO_STRING_PRETTY));
457 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)
460 printf("ON-SUBCALL %s: %s/%s %s\n", (char*)request, api, verb, json_object_to_json_string(args));
462 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));
463 afb_proto_ws_subcall_reply(subcall, 1, NULL);
468 static void pws_call(const char *verb, const char *object)
473 struct json_object *o;
475 /* allocates an id for the request */
476 rc = asprintf(&key, "%d:%s", ++num, verb);
478 /* echo the command if asked */
480 printf("SEND-CALL: %s %s\n", verb, object?:"null");
482 /* send the request */
484 if (object == NULL || object[0] == 0 || !strcmp(object, "null"))
487 o = json_tokener_parse(object);
489 o = json_object_new_string(object);
491 rc = afb_proto_ws_client_call(pws, verb, o, sessionid, key);
494 fprintf(stderr, "calling %s(%s) failed: %m\n", verb, object?:"");
501 /* called when pws hangsup */
502 static void on_pws_hangup(void *closure)
504 printf("ON-HANGUP\n");