/
curlev.c
215 lines (195 loc) · 5.77 KB
/
curlev.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/* vim: ft=c ff=unix fenc=utf-8
* file: curlev.c
* пример использования curl multi и libev
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/time.h>
#include "curlev.h"
static size_t
_curl_write_cb(void *ptr, size_t size, size_t nmemb, struct curlex *ex)
{
if (ex && ex->cb) {
return ex->cb(ptr, size * nmemb, ex->cb_data);
}
return size * nmemb;
}
static void
_ev_event_curl_cb(struct ev_loop *loop, struct ev_io *w, int revents)
{
struct curlev *cuev = w->data;
CURLMcode rc = 0;
int curla = (revents & EV_READ ? CURL_POLL_IN : 0) |
( revents & EV_WRITE ? CURL_POLL_OUT : 0);
int running = 0;
if ((rc = curl_multi_socket_action(cuev->multi, w->fd, curla, &running))
!= CURLM_OK) {
xsyslog(LOG_WARNING, "curl_multi_socket_action() error: rc=%d", rc);
return;
}
/* TODO: ? */
/* проверка состояния */
{
int _msgs = 0;
CURLMsg *_msg = NULL;
CURL *_easy = NULL;
struct curlex *_ex = NULL;
while ((_msg = curl_multi_info_read(cuev->multi, &_msgs)) != NULL) {
if (_msg->msg == CURLMSG_DONE) {
_easy = _msg->easy_handle;
/* освбождение всякого мусора */
if (!curl_easy_getinfo(_easy, CURLINFO_PRIVATE, &_ex) && _ex) {
if (_ex->cb) {
/* финализация записи */
_ex->cb(NULL, 0ul, _ex->cb_data);
}
free(_ex);
}
curl_multi_remove_handle(cuev->multi, _easy);
curl_easy_cleanup(_easy);
}
} /* while */
}
}
static void
_ev_timer_curl_cb(struct ev_loop *loop, struct ev_timer *w, int revents)
{
int running = 0;
struct curlev *cuev = w->data;
curl_multi_socket_action(cuev->multi, CURL_SOCKET_TIMEOUT, 0, &running);
xsyslog(LOG_INFO, "ev timer: %p, running: %d", (void*)cuev, running);
}
static int
_curl_timer_cb(CURLM *multi, long timeout_ms, struct curlev *cuev)
{
if (cuev->timered) {
ev_timer_stop(cuev->loop, &cuev->timer);
cuev->timered = false;
}
xsyslog(LOG_INFO, "curl update timer to %ldms", timeout_ms);
if (timeout_ms > 0) {
double _t = timeout_ms / 1000.0;
ev_timer_set(&cuev->timer, _t, 0.);
ev_timer_start(cuev->loop, &cuev->timer);
cuev->timered = true;
} else {
_ev_timer_curl_cb(cuev->loop, &cuev->timer, 0);
}
return 0;
}
static int
_curl_socket_cb(CURL *e, curl_socket_t s, int what,
struct curlev *cuev, struct ev_io *evio)
{
xsyslog(LOG_DEBUG, "socket #%d action: %d, evio %p", s, what, (void*)evio);
/* события curl с сокетами (what):
* CURL_POLL_NONE: ничего
* CURL_POLL_REMOVE: удаление
* CURL_POLL_IN: регистрирация для чтения
* CURL_POLL_OUT: регистрация для записи
* CURL_POLL_INOUT: регистрация для чтения и записи
*
* до вызова curl_multi_assign() аргумент evio == NULL
*/
if (what == CURL_POLL_REMOVE) {
xsyslog(LOG_DEBUG, "curl remove socket #%d", s);
if (!evio) {
xsyslog(LOG_WARNING, "curl: no data to remove");
return 0;
}
ev_io_stop(cuev->loop, evio);
free(evio);
} else {
int eva = (what & CURL_POLL_IN ? EV_READ : 0) |
(what & CURL_POLL_OUT ? EV_WRITE : 0);
if (!evio) {
xsyslog(LOG_DEBUG, "curl alloc socket #%d (action: %d)", s, eva);
/* не проциниализировано */
evio = calloc(1, sizeof(struct ev_io));
evio->data = cuev;
ev_io_init(evio, _ev_event_curl_cb, s, eva);
ev_io_start(cuev->loop, evio);
curl_multi_assign(cuev->multi, s, evio);
} else {
xsyslog(LOG_DEBUG, "curl update socket #%d (action: %d)", s, eva);
/* изменение состояния */
ev_io_stop(cuev->loop, evio);
ev_io_set(evio, s, eva);
ev_io_start(cuev->loop, evio);
}
}
return 0;
}
bool
cuev_init(struct curlev *cuev, struct ev_loop *loop)
{
memset(cuev, 0, sizeof(*cuev));
cuev->loop = loop;
cuev->multi = curl_multi_init();
curl_multi_setopt(cuev->multi, CURLMOPT_SOCKETFUNCTION, _curl_socket_cb);
curl_multi_setopt(cuev->multi, CURLMOPT_SOCKETDATA, cuev);
curl_multi_setopt(cuev->multi, CURLMOPT_TIMERFUNCTION, _curl_timer_cb);
curl_multi_setopt(cuev->multi, CURLMOPT_TIMERDATA, cuev);
/* инициализация колбека для таймера */
ev_timer_init(&cuev->timer, _ev_timer_curl_cb, 0., 0.);
cuev->timer.data = cuev;
return true;
}
void
cuev_destroy(struct curlev *cuev)
{
if (!cuev)
return;
if (cuev->multi)
curl_multi_cleanup(cuev->multi);
if (cuev->timered)
ev_timer_stop(cuev->loop, &cuev->timer);
memset(cuev, 0, sizeof(*cuev));
}
bool
cuev_emit(struct curlev *cuev, char *url, struct curl_slist *headers,
curlev_cb_t cb, void *cb_data)
{
struct curlex *ex = NULL;
CURL *easy = curl_easy_init();
CURLMcode code;
if (!easy) {
xsyslog(LOG_WARNING, "curl_easy_init() failed for url '%s' (errno: %d)",
url, errno);
return false;
}
curl_easy_setopt(easy, CURLOPT_URL, url);
curl_easy_setopt(easy, CURLOPT_VERBOSE, 0L);
curl_easy_setopt(easy, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(easy, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(easy, CURLOPT_WRITEFUNCTION, _curl_write_cb);
if (cb) {
ex = calloc(1, sizeof(*ex));
if (!ex) {
xsyslog(LOG_WARNING, "cuev_emit() failed: calloc(%d) with errno: %d",
(int)sizeof(*ex), errno);
curl_easy_cleanup(easy);
return false;
}
ex->cb = cb;
ex->cb_data = cb_data;
curl_easy_setopt(easy, CURLOPT_WRITEDATA, ex);
curl_easy_setopt(easy, CURLOPT_PRIVATE, ex);
} else {
curl_easy_setopt(easy, CURLOPT_WRITEDATA, NULL);
curl_easy_setopt(easy, CURLOPT_PRIVATE, NULL);
}
if (headers) {
/* TODO: добавить хидеры */
}
if ((code = curl_multi_add_handle(cuev->multi, easy)) != CURLM_OK) {
xsyslog(LOG_WARNING, "curl_multi_add_handle() failed for url '%s', code: %d",
url, code);
curl_easy_cleanup(easy);
return false;
}
return true;
}