1*1c60b9acSAndroid Build Coastguard Worker /*
2*1c60b9acSAndroid Build Coastguard Worker * lws-api-test-lws_struct-json
3*1c60b9acSAndroid Build Coastguard Worker *
4*1c60b9acSAndroid Build Coastguard Worker * Written in 2010-2020 by Andy Green <[email protected]>
5*1c60b9acSAndroid Build Coastguard Worker *
6*1c60b9acSAndroid Build Coastguard Worker * This file is made available under the Creative Commons CC0 1.0
7*1c60b9acSAndroid Build Coastguard Worker * Universal Public Domain Dedication.
8*1c60b9acSAndroid Build Coastguard Worker *
9*1c60b9acSAndroid Build Coastguard Worker * lws_struct apis are used to serialize and deserialize your C structs and
10*1c60b9acSAndroid Build Coastguard Worker * linked-lists in a standardized way that's very modest on memory but
11*1c60b9acSAndroid Build Coastguard Worker * convenient and easy to maintain.
12*1c60b9acSAndroid Build Coastguard Worker *
13*1c60b9acSAndroid Build Coastguard Worker * This second test file shows a worked example for how to express a schema
14*1c60b9acSAndroid Build Coastguard Worker * and both consume JSON -> struct and struct -> JSON for it.
15*1c60b9acSAndroid Build Coastguard Worker */
16*1c60b9acSAndroid Build Coastguard Worker
17*1c60b9acSAndroid Build Coastguard Worker #include <libwebsockets.h>
18*1c60b9acSAndroid Build Coastguard Worker
19*1c60b9acSAndroid Build Coastguard Worker static const char * const test2_json =
20*1c60b9acSAndroid Build Coastguard Worker "{"
21*1c60b9acSAndroid Build Coastguard Worker "\"config\":["
22*1c60b9acSAndroid Build Coastguard Worker "{"
23*1c60b9acSAndroid Build Coastguard Worker "\"id1\":" "null,"
24*1c60b9acSAndroid Build Coastguard Worker "\"creds\":{"
25*1c60b9acSAndroid Build Coastguard Worker "\"key1\":" "\"\\\"xxxxxxxxx\\\"\","
26*1c60b9acSAndroid Build Coastguard Worker "\"key2\":" "null"
27*1c60b9acSAndroid Build Coastguard Worker "},"
28*1c60b9acSAndroid Build Coastguard Worker "\"frequency\":" "0,"
29*1c60b9acSAndroid Build Coastguard Worker "\"arg1\":" "\"val1\","
30*1c60b9acSAndroid Build Coastguard Worker "\"arg2\":" "0,"
31*1c60b9acSAndroid Build Coastguard Worker "\"priority\":" "1,"
32*1c60b9acSAndroid Build Coastguard Worker "\"ssid\":" "\"\\\"nw2\\\"\""
33*1c60b9acSAndroid Build Coastguard Worker "}, {"
34*1c60b9acSAndroid Build Coastguard Worker "\"id2\":" "null,"
35*1c60b9acSAndroid Build Coastguard Worker "\"creds\": {"
36*1c60b9acSAndroid Build Coastguard Worker "\"key1\":" "\"\\\"xxxxxxxxxxxxx\\\"\","
37*1c60b9acSAndroid Build Coastguard Worker "\"key2\":" "null"
38*1c60b9acSAndroid Build Coastguard Worker "},"
39*1c60b9acSAndroid Build Coastguard Worker "\"frequency\":" "11,"
40*1c60b9acSAndroid Build Coastguard Worker "\"arg1\":" "\"val2\","
41*1c60b9acSAndroid Build Coastguard Worker "\"arg2\":" "1420887242594,"
42*1c60b9acSAndroid Build Coastguard Worker "\"priority\":" "3,"
43*1c60b9acSAndroid Build Coastguard Worker "\"ssid\":" "\"\\\"nw1\\\"\""
44*1c60b9acSAndroid Build Coastguard Worker "}"
45*1c60b9acSAndroid Build Coastguard Worker "]"
46*1c60b9acSAndroid Build Coastguard Worker "}";
47*1c60b9acSAndroid Build Coastguard Worker
48*1c60b9acSAndroid Build Coastguard Worker static const char * const test2_json_expected =
49*1c60b9acSAndroid Build Coastguard Worker "{\"config\":[{\"creds\":{\"key1\":\"\\u0022xxxxxxxxx\\u0022\"},"
50*1c60b9acSAndroid Build Coastguard Worker "\"arg1\":\"val1\",\"ssid\":\"\\u0022nw2\\u0022\","
51*1c60b9acSAndroid Build Coastguard Worker "\"frequency\":0,\"arg2\":0,\"priority\":1},"
52*1c60b9acSAndroid Build Coastguard Worker "{\"creds\":{\"key1\":\"\\u0022xxxxxxxxxxxxx\\u0022\"},"
53*1c60b9acSAndroid Build Coastguard Worker "\"arg1\":\"val2\",\"ssid\":\"\\u0022nw1\\u0022\","
54*1c60b9acSAndroid Build Coastguard Worker "\"frequency\":11,\"arg2\":1420887242594,\"priority\":3}]}"
55*1c60b9acSAndroid Build Coastguard Worker ;
56*1c60b9acSAndroid Build Coastguard Worker
57*1c60b9acSAndroid Build Coastguard Worker /*
58*1c60b9acSAndroid Build Coastguard Worker * level 3: Credentials object
59*1c60b9acSAndroid Build Coastguard Worker */
60*1c60b9acSAndroid Build Coastguard Worker
61*1c60b9acSAndroid Build Coastguard Worker typedef struct t2_cred {
62*1c60b9acSAndroid Build Coastguard Worker const char *key1;
63*1c60b9acSAndroid Build Coastguard Worker const char *key2;
64*1c60b9acSAndroid Build Coastguard Worker } t2_cred_t;
65*1c60b9acSAndroid Build Coastguard Worker
66*1c60b9acSAndroid Build Coastguard Worker static const lws_struct_map_t lsm_t2_cred[] = {
67*1c60b9acSAndroid Build Coastguard Worker LSM_STRING_PTR (t2_cred_t, key1, "key1"),
68*1c60b9acSAndroid Build Coastguard Worker LSM_STRING_PTR (t2_cred_t, key2, "key2"),
69*1c60b9acSAndroid Build Coastguard Worker };
70*1c60b9acSAndroid Build Coastguard Worker
71*1c60b9acSAndroid Build Coastguard Worker /*
72*1c60b9acSAndroid Build Coastguard Worker * level 2: Configuration object, containing a child credentials object
73*1c60b9acSAndroid Build Coastguard Worker */
74*1c60b9acSAndroid Build Coastguard Worker
75*1c60b9acSAndroid Build Coastguard Worker typedef struct t2_config {
76*1c60b9acSAndroid Build Coastguard Worker lws_dll2_t list;
77*1c60b9acSAndroid Build Coastguard Worker t2_cred_t *creds;
78*1c60b9acSAndroid Build Coastguard Worker const char *id1;
79*1c60b9acSAndroid Build Coastguard Worker const char *arg1;
80*1c60b9acSAndroid Build Coastguard Worker const char *ssid;
81*1c60b9acSAndroid Build Coastguard Worker unsigned int frequency;
82*1c60b9acSAndroid Build Coastguard Worker unsigned long long arg2;
83*1c60b9acSAndroid Build Coastguard Worker unsigned int priority;
84*1c60b9acSAndroid Build Coastguard Worker } t2_config_t;
85*1c60b9acSAndroid Build Coastguard Worker
86*1c60b9acSAndroid Build Coastguard Worker static const lws_struct_map_t lsm_t2_config[] = {
87*1c60b9acSAndroid Build Coastguard Worker LSM_CHILD_PTR (t2_config_t,
88*1c60b9acSAndroid Build Coastguard Worker creds, /* the child pointer member */
89*1c60b9acSAndroid Build Coastguard Worker t2_cred_t, /* the child type */
90*1c60b9acSAndroid Build Coastguard Worker NULL, lsm_t2_cred, /* map object for item type */
91*1c60b9acSAndroid Build Coastguard Worker "creds"), /* outer json object name */
92*1c60b9acSAndroid Build Coastguard Worker LSM_STRING_PTR (t2_config_t, id1, "id1"),
93*1c60b9acSAndroid Build Coastguard Worker LSM_STRING_PTR (t2_config_t, arg1, "arg1"),
94*1c60b9acSAndroid Build Coastguard Worker LSM_STRING_PTR (t2_config_t, ssid, "ssid"),
95*1c60b9acSAndroid Build Coastguard Worker
96*1c60b9acSAndroid Build Coastguard Worker LSM_UNSIGNED (t2_config_t, frequency, "frequency"),
97*1c60b9acSAndroid Build Coastguard Worker LSM_UNSIGNED (t2_config_t, arg2, "arg2"),
98*1c60b9acSAndroid Build Coastguard Worker LSM_UNSIGNED (t2_config_t, priority, "priority"),
99*1c60b9acSAndroid Build Coastguard Worker };
100*1c60b9acSAndroid Build Coastguard Worker
101*1c60b9acSAndroid Build Coastguard Worker /*
102*1c60b9acSAndroid Build Coastguard Worker * level 1: list-of-configurations object
103*1c60b9acSAndroid Build Coastguard Worker */
104*1c60b9acSAndroid Build Coastguard Worker
105*1c60b9acSAndroid Build Coastguard Worker typedef struct t2_configs {
106*1c60b9acSAndroid Build Coastguard Worker lws_dll2_owner_t configs;
107*1c60b9acSAndroid Build Coastguard Worker } t2_configs_t;
108*1c60b9acSAndroid Build Coastguard Worker
109*1c60b9acSAndroid Build Coastguard Worker static const lws_struct_map_t lsm_t2_configs[] = {
110*1c60b9acSAndroid Build Coastguard Worker LSM_LIST (t2_configs_t, configs, /* the list owner type/member */
111*1c60b9acSAndroid Build Coastguard Worker t2_config_t, list, /* the list item type/member */
112*1c60b9acSAndroid Build Coastguard Worker NULL, lsm_t2_config, /* map object for item type */
113*1c60b9acSAndroid Build Coastguard Worker "config"), /* outer json object name */
114*1c60b9acSAndroid Build Coastguard Worker };
115*1c60b9acSAndroid Build Coastguard Worker
116*1c60b9acSAndroid Build Coastguard Worker /*
117*1c60b9acSAndroid Build Coastguard Worker * For parsing, this lists the kind of object we expect to parse so the struct
118*1c60b9acSAndroid Build Coastguard Worker * can be allocated polymorphically.
119*1c60b9acSAndroid Build Coastguard Worker *
120*1c60b9acSAndroid Build Coastguard Worker * Lws uses an explicit "schema" member so the type is known unambiguously. If
121*1c60b9acSAndroid Build Coastguard Worker * in the incoming JSON the first member is not "schema", it will scan the
122*1c60b9acSAndroid Build Coastguard Worker * maps listed here and instantiate the first object that has a member of that
123*1c60b9acSAndroid Build Coastguard Worker * name.
124*1c60b9acSAndroid Build Coastguard Worker */
125*1c60b9acSAndroid Build Coastguard Worker
126*1c60b9acSAndroid Build Coastguard Worker static const lws_struct_map_t lsm_schema[] = {
127*1c60b9acSAndroid Build Coastguard Worker LSM_SCHEMA (t2_configs_t, NULL, lsm_t2_configs, "t2"),
128*1c60b9acSAndroid Build Coastguard Worker /* other schemata that might need parsing... */
129*1c60b9acSAndroid Build Coastguard Worker };
130*1c60b9acSAndroid Build Coastguard Worker
131*1c60b9acSAndroid Build Coastguard Worker
132*1c60b9acSAndroid Build Coastguard Worker
133*1c60b9acSAndroid Build Coastguard Worker static int
t2_config_dump(struct lws_dll2 * d,void * user)134*1c60b9acSAndroid Build Coastguard Worker t2_config_dump(struct lws_dll2 *d, void *user)
135*1c60b9acSAndroid Build Coastguard Worker {
136*1c60b9acSAndroid Build Coastguard Worker #if !defined(LWS_WITH_NO_LOGS)
137*1c60b9acSAndroid Build Coastguard Worker t2_config_t *c = lws_container_of(d, t2_config_t, list);
138*1c60b9acSAndroid Build Coastguard Worker
139*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: id1 '%s'\n", __func__, c->id1);
140*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: arg1 '%s'\n", __func__, c->arg1);
141*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: ssid '%s'\n", __func__, c->ssid);
142*1c60b9acSAndroid Build Coastguard Worker
143*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: freq %d\n", __func__, c->frequency);
144*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: arg2 %llu\n", __func__, c->arg2);
145*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: priority %d\n", __func__, c->priority);
146*1c60b9acSAndroid Build Coastguard Worker
147*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: key1: %s, key2: %s\n", __func__,
148*1c60b9acSAndroid Build Coastguard Worker c->creds->key1, c->creds->key2);
149*1c60b9acSAndroid Build Coastguard Worker #endif
150*1c60b9acSAndroid Build Coastguard Worker
151*1c60b9acSAndroid Build Coastguard Worker return 0;
152*1c60b9acSAndroid Build Coastguard Worker }
153*1c60b9acSAndroid Build Coastguard Worker
154*1c60b9acSAndroid Build Coastguard Worker static int
t2_configs_dump(t2_configs_t * t2cs)155*1c60b9acSAndroid Build Coastguard Worker t2_configs_dump(t2_configs_t *t2cs)
156*1c60b9acSAndroid Build Coastguard Worker {
157*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: number of configs: %d\n", __func__,
158*1c60b9acSAndroid Build Coastguard Worker t2cs->configs.count);
159*1c60b9acSAndroid Build Coastguard Worker
160*1c60b9acSAndroid Build Coastguard Worker lws_dll2_foreach_safe(&t2cs->configs, NULL, t2_config_dump);
161*1c60b9acSAndroid Build Coastguard Worker
162*1c60b9acSAndroid Build Coastguard Worker return 0;
163*1c60b9acSAndroid Build Coastguard Worker }
164*1c60b9acSAndroid Build Coastguard Worker
165*1c60b9acSAndroid Build Coastguard Worker
166*1c60b9acSAndroid Build Coastguard Worker int
test2(void)167*1c60b9acSAndroid Build Coastguard Worker test2(void)
168*1c60b9acSAndroid Build Coastguard Worker {
169*1c60b9acSAndroid Build Coastguard Worker lws_struct_serialize_t *ser;
170*1c60b9acSAndroid Build Coastguard Worker struct lejp_ctx ctx;
171*1c60b9acSAndroid Build Coastguard Worker lws_struct_args_t a;
172*1c60b9acSAndroid Build Coastguard Worker t2_configs_t *top;
173*1c60b9acSAndroid Build Coastguard Worker uint8_t buf[4096];
174*1c60b9acSAndroid Build Coastguard Worker size_t written;
175*1c60b9acSAndroid Build Coastguard Worker int n, bad = 1;
176*1c60b9acSAndroid Build Coastguard Worker
177*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: start \n", __func__);
178*1c60b9acSAndroid Build Coastguard Worker
179*1c60b9acSAndroid Build Coastguard Worker memset(&a, 0, sizeof(a));
180*1c60b9acSAndroid Build Coastguard Worker a.map_st[0] = lsm_schema;
181*1c60b9acSAndroid Build Coastguard Worker a.map_entries_st[0] = LWS_ARRAY_SIZE(lsm_schema);
182*1c60b9acSAndroid Build Coastguard Worker a.ac_block_size = 512;
183*1c60b9acSAndroid Build Coastguard Worker lws_struct_json_init_parse(&ctx, NULL, &a);
184*1c60b9acSAndroid Build Coastguard Worker
185*1c60b9acSAndroid Build Coastguard Worker n = lejp_parse(&ctx, (uint8_t *)test2_json, (int)strlen(test2_json));
186*1c60b9acSAndroid Build Coastguard Worker lwsl_notice("%s: lejp_parse %d\n", __func__, n);
187*1c60b9acSAndroid Build Coastguard Worker if (n < 0) {
188*1c60b9acSAndroid Build Coastguard Worker lwsl_err("%s: test2 JSON decode failed '%s'\n",
189*1c60b9acSAndroid Build Coastguard Worker __func__, lejp_error_to_string(n));
190*1c60b9acSAndroid Build Coastguard Worker goto bail;
191*1c60b9acSAndroid Build Coastguard Worker }
192*1c60b9acSAndroid Build Coastguard Worker lwsac_info(a.ac);
193*1c60b9acSAndroid Build Coastguard Worker
194*1c60b9acSAndroid Build Coastguard Worker top = (t2_configs_t *)a.dest; /* the top level object */
195*1c60b9acSAndroid Build Coastguard Worker
196*1c60b9acSAndroid Build Coastguard Worker if (!top) {
197*1c60b9acSAndroid Build Coastguard Worker lwsl_err("%s: no top level object\n", __func__);
198*1c60b9acSAndroid Build Coastguard Worker goto bail;
199*1c60b9acSAndroid Build Coastguard Worker }
200*1c60b9acSAndroid Build Coastguard Worker t2_configs_dump(top);
201*1c60b9acSAndroid Build Coastguard Worker
202*1c60b9acSAndroid Build Coastguard Worker /* 2. Let's reserialize the top level object and see what comes out */
203*1c60b9acSAndroid Build Coastguard Worker
204*1c60b9acSAndroid Build Coastguard Worker ser = lws_struct_json_serialize_create(&lsm_schema[0], 1,
205*1c60b9acSAndroid Build Coastguard Worker LSSERJ_FLAG_OMIT_SCHEMA, top);
206*1c60b9acSAndroid Build Coastguard Worker if (!ser) {
207*1c60b9acSAndroid Build Coastguard Worker lwsl_err("%s: unable to init serialization\n", __func__);
208*1c60b9acSAndroid Build Coastguard Worker goto bail;
209*1c60b9acSAndroid Build Coastguard Worker }
210*1c60b9acSAndroid Build Coastguard Worker
211*1c60b9acSAndroid Build Coastguard Worker do {
212*1c60b9acSAndroid Build Coastguard Worker n = (int)lws_struct_json_serialize(ser, buf, sizeof(buf), &written);
213*1c60b9acSAndroid Build Coastguard Worker switch (n) {
214*1c60b9acSAndroid Build Coastguard Worker case LSJS_RESULT_FINISH:
215*1c60b9acSAndroid Build Coastguard Worker puts((const char *)buf);
216*1c60b9acSAndroid Build Coastguard Worker break;
217*1c60b9acSAndroid Build Coastguard Worker case LSJS_RESULT_CONTINUE:
218*1c60b9acSAndroid Build Coastguard Worker case LSJS_RESULT_ERROR:
219*1c60b9acSAndroid Build Coastguard Worker goto bail;
220*1c60b9acSAndroid Build Coastguard Worker }
221*1c60b9acSAndroid Build Coastguard Worker } while (n == LSJS_RESULT_CONTINUE);
222*1c60b9acSAndroid Build Coastguard Worker
223*1c60b9acSAndroid Build Coastguard Worker if (strcmp(test2_json_expected, (char *)buf)) {
224*1c60b9acSAndroid Build Coastguard Worker lwsl_err("%s: expected %s\n", __func__, test2_json_expected);
225*1c60b9acSAndroid Build Coastguard Worker goto bail;
226*1c60b9acSAndroid Build Coastguard Worker }
227*1c60b9acSAndroid Build Coastguard Worker
228*1c60b9acSAndroid Build Coastguard Worker lws_struct_json_serialize_destroy(&ser);
229*1c60b9acSAndroid Build Coastguard Worker
230*1c60b9acSAndroid Build Coastguard Worker bad = 0;
231*1c60b9acSAndroid Build Coastguard Worker
232*1c60b9acSAndroid Build Coastguard Worker bail:
233*1c60b9acSAndroid Build Coastguard Worker lwsac_free(&a.ac);
234*1c60b9acSAndroid Build Coastguard Worker
235*1c60b9acSAndroid Build Coastguard Worker return bad;
236*1c60b9acSAndroid Build Coastguard Worker }
237