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#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <uthash.h>
#include <features.h>
#include "libuwsc/uwsc.h"
#include "common/config.h"
#include "common/util.h"
#include "liveapi.h"
#include "messages.h"
#include "stdin.h"
static struct uwsc_client * webclient;
static struct ev_loop *loop = NULL;
static char stepping = 1;
static const char * _authToken;
struct result {
int id;
cJSON* json;
UT_hash_handle hh;
};
static struct result * results = NULL;
void liveapi_activate_stdin(liveapi_stdin_cb * cb)
{
liveapi_activate_stdin_with_callback(webclient, cb);
}
static void liveapi_send(const char* msg)
{
#ifdef DEBUG_WEBSOCKETS
printf("==>:%s\n", msg);
#endif
webclient->send_ex(webclient, UWSC_OP_TEXT, 1, strlen(msg), msg);
// TODO handle errors
}
void liveapi_send_json(size_t id, cJSON* json)
{
char * msg = cJSON_Print(json);
if (id > 0) {
struct result * result = malloc(sizeof(struct result));
result->id = id;
result->json = json;
HASH_ADD_INT(results, id, result);
}
liveapi_send(msg);
if (id == 0)
cJSON_Delete(json);
free(msg);
}
static void uwsc_onopen(struct uwsc_client *cl UNUSED)
{
uwsc_log_info("onopen\n");
}
static void uwsc_onmessage(struct uwsc_client *cl,
void *data, size_t len, bool binary)
{
#ifdef DEBUG_WEBSOCKETS
printf("<==:");
#endif
if (binary) {
fprintf(stderr, "Websocket binary messages are not unsupported\n");
#ifdef DEBUG_WEBSOCKETS
size_t i;
uint8_t *p = data;
for (i = 0; i < len; i++) {
printf("%02hhX ", p[i]);
if (i % 16 == 0 && i > 0)
puts("");
}
puts("");
#endif
} else {
#ifdef DEBUG_WEBSOCKETS
printf("%.*s\n", (int)len, (char *)data);
#endif
char* buffer = malloc (len + 1);
strncpy(buffer, data, len);
buffer[len] = 0;
cJSON* json = cJSON_Parse(buffer);
if (json == NULL) {
const char *error_ptr = cJSON_GetErrorPtr();
if (error_ptr != NULL)
fprintf(stderr, "Json parsing error reading websocket message: %s\n", error_ptr);
fprintf(stderr, "Error while parsing websocket message, couldn't parse json output :\n%s\n", buffer);
goto onmessage_json_cleanup;
}
const cJSON* server_id = cJSON_GetObjectItemCaseSensitive(json, "server_id");
if (cJSON_IsString(server_id) && server_id->valuestring != NULL) {
liveapi_connect();
goto onmessage_json_cleanup;
}
const cJSON* msg = cJSON_GetObjectItemCaseSensitive(json, "msg");
if (cJSON_IsString(msg) && msg->valuestring != NULL) {
if (strcmp(msg->valuestring, "ping") == 0) {
liveapi_send("{ \"msg\": \"pong\" }");
} else if (strcmp(msg->valuestring, "connected") == 0) {
liveapi_login(_authToken);
ev_break(cl->loop, EVBREAK_ALL);
} else if (strcmp(msg->valuestring, "result") == 0) {
const cJSON* jid = cJSON_GetObjectItemCaseSensitive(json, "id");
if (!cJSON_IsString(jid) || jid->valuestring == NULL) {
fprintf(stderr, "Invalid websocket result : %s\n", buffer);
goto onmessage_json_cleanup;
}
size_t id = (size_t) strtoll(jid->valuestring, NULL, 10);
struct result * result = NULL;
HASH_FIND_INT(results, &id, result);
if (result == NULL) {
fprintf(stderr, "Got a websocket result message that doesn't match any method we sent : %s\n", buffer);
goto onmessage_json_cleanup;
}
cJSON_Delete(result->json);
HASH_DEL(results, result);
free(result);
// if we were stepping and got no more results we break out of the loop
if (stepping == 1 && HASH_COUNT(results) == 0)
ev_break(cl->loop, EVBREAK_ALL);
} else {
fprintf(stderr, "Unhandled websocket message : %s\n", msg->valuestring);
}
} else {
fprintf(stderr, "Unhandled websocket without msg : %s\n", buffer);
}
onmessage_json_cleanup:
cJSON_Delete(json);
free(buffer);
}
}
static void uwsc_onerror(struct uwsc_client *cl, int err, const char *msg)
{
uwsc_log_err("onerror:%d: %s\n", err, msg);
ev_break(cl->loop, EVBREAK_ALL);
}
static void uwsc_onclose(struct uwsc_client *cl, int code, const char *reason)
{
uwsc_log_err("onclose:%d: %s\n", code, reason);
ev_break(cl->loop, EVBREAK_ALL);
}
static void signal_cb(struct ev_loop *loop, ev_signal *w, int revents)
{
if (w->signum == SIGINT) {
(void) loop;
//ev_break(loop, EVBREAK_ALL);
uwsc_log_info("Normal quit\n");
webclient->send_close(webclient, 0, "got signal");
}
(void) revents;
}
char liveapi_init(const char * authToken)
{
_authToken = authToken;
const char *url = config_get_wss_url();
loop = EV_DEFAULT;
struct ev_signal signal_watcher;
int ping_interval = 10; /* second */
uwsc_log_info("Libuwsc: %s\n", UWSC_VERSION_STRING);
webclient = uwsc_new(loop, url, ping_interval, NULL);
if (!webclient)
return -1;
uwsc_log_info("Start connect...\n");
webclient->onopen = uwsc_onopen;
webclient->onmessage = uwsc_onmessage;
webclient->onerror = uwsc_onerror;
webclient->onclose = uwsc_onclose;
ev_signal_init(&signal_watcher, signal_cb, SIGINT);
ev_signal_start(loop, &signal_watcher);
ev_run(loop, 0);
return 0;
}
char liveapi_loop(void)
{
stepping = 0;
ev_run(loop, 0);
return 0;
}
char liveapi_step(void)
{
if (HASH_COUNT(results) > 0) {
stepping = 1;
ev_run(loop, 0);
}
return 0;
}
void liveapi_clean(void)
{
struct result *s, *tmp;
HASH_ITER(hh, results, s, tmp) {
cJSON_Delete(s->json);
HASH_DELETE(hh, results, s);
free(s);
}
free(webclient);
}
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