git.m6w6.name Git - m6w6/ext-http/blob - src/php_http_client_curl_event.c

   1 /*
   2     +--------------------------------------------------------------------+
   3     | PECL :: http                                                       |
   4     +--------------------------------------------------------------------+
   5     | Redistribution and use in source and binary forms, with or without |
   6     | modification, are permitted provided that the conditions mentioned |
   7     | in the accompanying LICENSE file are met.                          |
   8     +--------------------------------------------------------------------+
   9     | Copyright (c) 2004-2014, Michael Wallner <mike@php.net>            |
  10     +--------------------------------------------------------------------+
  11 */
  12
  13 #include "php_http_api.h"
  14
  15 #if PHP_HTTP_HAVE_LIBCURL
  16 #if PHP_HTTP_HAVE_LIBEVENT
  17
  18 #include <event.h>
  19 #ifndef DBG_EVENTS
  20 #       define DBG_EVENTS 0
  21 #endif
  22
  23 typedef struct php_http_client_curl_event_context {
  24         php_http_client_t *client;
  25         struct event_base *evbase;
  26         struct event *timeout;
  27 } php_http_client_curl_event_context_t;
  28
  29 typedef struct php_http_client_curl_event_ev {
  30         struct event evnt;
  31         php_http_client_curl_event_context_t *context;
  32 } php_http_client_curl_event_ev_t;
  33
  34 static inline int etoca(short action) {
  35         switch (action & (EV_READ|EV_WRITE)) {
  36                 case EV_READ:
  37                         return CURL_CSELECT_IN;
  38                         break;
  39                 case EV_WRITE:
  40                         return CURL_CSELECT_OUT;
  41                         break;
  42                 case EV_READ|EV_WRITE:
  43                         return CURL_CSELECT_IN|CURL_CSELECT_OUT;
  44                         break;
  45                 default:
  46                         return 0;
  47         }
  48 }
  49
  50 static void php_http_client_curl_event_handler(void *context, curl_socket_t s, int curl_action)
  51 {
  52         CURLMcode rc;
  53         php_http_client_curl_event_context_t *ctx = context;
  54         php_http_client_curl_t *curl = ctx->client->ctx;
  55
  56 #if DBG_EVENTS
  57         fprintf(stderr, "H");
  58 #endif
  59
  60         do {
  61                 rc = curl_multi_socket_action(curl->handle->multi, s, curl_action, &curl->unfinished);
  62         } while (CURLM_CALL_MULTI_PERFORM == rc);
  63
  64         if (CURLM_OK != rc) {
  65                 php_error_docref(NULL, E_WARNING, "%s",  curl_multi_strerror(rc));
  66         }
  67
  68         php_http_client_curl_responsehandler(ctx->client);
  69 }
  70
  71 static void php_http_client_curl_event_timeout_callback(int socket, short action, void *event_data)
  72 {
  73 #if DBG_EVENTS
  74         fprintf(stderr, "T");
  75 #endif
  76
  77         /* ignore and use -1,0 on timeout */
  78         (void) socket;
  79         (void) action;
  80
  81         php_http_client_curl_event_handler(event_data, CURL_SOCKET_TIMEOUT, 0);
  82 }
  83
  84 static void php_http_client_curl_event_timer(CURLM *multi, long timeout_ms, void *timer_data)
  85 {
  86         php_http_client_curl_event_context_t *context = timer_data;
  87
  88 #if DBG_EVENTS
  89         fprintf(stderr, "\ntimer <- timeout_ms: %ld\n", timeout_ms);
  90 #endif
  91
  92         if (timeout_ms < 0) {
  93                 php_http_client_curl_event_handler(context, CURL_SOCKET_TIMEOUT, 0);
  94         } else if (timeout_ms > 0 || !event_initialized(context->timeout) || !event_pending(context->timeout, EV_TIMEOUT, NULL)) {
  95                 struct timeval timeout;
  96
  97                 if (!event_initialized(context->timeout)) {
  98                         event_assign(context->timeout, context->evbase, CURL_SOCKET_TIMEOUT, 0, php_http_client_curl_event_timeout_callback, context);
  99                 }
 100
 101                 timeout.tv_sec = timeout_ms / 1000;
 102                 timeout.tv_usec = (timeout_ms % 1000) * 1000;
 103
 104                 event_add(context->timeout, &timeout);
 105         }
 106 }
 107
 108 static void php_http_client_curl_event_callback(int socket, short action, void *event_data)
 109 {
 110         php_http_client_curl_event_context_t *ctx = event_data;
 111         php_http_client_curl_t *curl = ctx->client->ctx;
 112
 113 #if DBG_EVENTS
 114         fprintf(stderr, "E");
 115 #endif
 116
 117         php_http_client_curl_event_handler(event_data, socket, etoca(action));
 118
 119         /* remove timeout if there are no transfers left */
 120         if (!curl->unfinished && event_initialized(ctx->timeout) && event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 121                 event_del(ctx->timeout);
 122         }
 123 }
 124
 125 static int php_http_client_curl_event_socket(CURL *easy, curl_socket_t sock, int action, void *socket_data, void *assign_data)
 126 {
 127         php_http_client_curl_event_context_t *ctx = socket_data;
 128         php_http_client_curl_t *curl = ctx->client->ctx;
 129         int events = EV_PERSIST;
 130         php_http_client_curl_event_ev_t *ev = assign_data;
 131
 132 #if DBG_EVENTS
 133         fprintf(stderr, "S");
 134 #endif
 135
 136         if (!ev) {
 137                 ev = ecalloc(1, sizeof(*ev));
 138                 ev->context = ctx;
 139                 curl_multi_assign(curl->handle->multi, sock, ev);
 140         } else {
 141                 event_del(&ev->evnt);
 142         }
 143
 144         switch (action) {
 145                 case CURL_POLL_IN:
 146                         events |= EV_READ;
 147                         break;
 148                 case CURL_POLL_OUT:
 149                         events |= EV_WRITE;
 150                         break;
 151                 case CURL_POLL_INOUT:
 152                         events |= EV_READ|EV_WRITE;
 153                         break;
 154
 155                 case CURL_POLL_REMOVE:
 156                         efree(ev);
 157                         /* no break */
 158                 case CURL_POLL_NONE:
 159                         return 0;
 160
 161                 default:
 162                         php_error_docref(NULL, E_WARNING, "Unknown socket action %d", action);
 163                         return -1;
 164         }
 165
 166         event_assign(&ev->evnt, ctx->evbase, sock, events, php_http_client_curl_event_callback, ctx);
 167         event_add(&ev->evnt, NULL);
 168
 169         return 0;
 170 }
 171
 172 static ZEND_RESULT_CODE php_http_client_curl_event_once(void *context)
 173 {
 174         php_http_client_curl_event_context_t *ctx = context;
 175
 176 #if DBG_EVENTS
 177         fprintf(stderr, "O");
 178 #endif
 179
 180         if (0 > event_base_loop(ctx->evbase, EVLOOP_NONBLOCK)) {
 181                 return FAILURE;
 182         }
 183         return SUCCESS;
 184 }
 185
 186 static ZEND_RESULT_CODE php_http_client_curl_event_wait(void *context, struct timeval *custom_timeout)
 187 {
 188         php_http_client_curl_event_context_t *ctx = context;
 189         struct timeval timeout;
 190
 191 #if DBG_EVENTS
 192         fprintf(stderr, "W");
 193 #endif
 194
 195         if (!event_initialized(ctx->timeout)) {
 196                 if (0 > event_assign(ctx->timeout, ctx->evbase, CURL_SOCKET_TIMEOUT, 0, php_http_client_curl_event_timeout_callback, ctx)) {
 197                         return FAILURE;
 198                 }
 199         } else if (custom_timeout && timerisset(custom_timeout)) {
 200                 if (0 > event_add(ctx->timeout, custom_timeout)) {
 201                         return FAILURE;
 202                 }
 203         } else if (!event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 204                 php_http_client_curl_get_timeout(ctx->client->ctx, 1000, &timeout);
 205                 if (0 > event_add(ctx->timeout, &timeout)) {
 206                         return FAILURE;
 207                 }
 208         }
 209
 210         if (0 > event_base_loop(ctx->evbase, EVLOOP_ONCE)) {
 211                 return FAILURE;
 212         }
 213
 214         return SUCCESS;
 215 }
 216
 217 static ZEND_RESULT_CODE php_http_client_curl_event_exec(void *context)
 218 {
 219         php_http_client_curl_event_context_t *ctx = context;
 220         php_http_client_curl_t *curl = ctx->client->ctx;
 221
 222 #if DBG_EVENTS
 223         fprintf(stderr, "E");
 224 #endif
 225
 226         /* kickstart */
 227         php_http_client_curl_event_handler(ctx, CURL_SOCKET_TIMEOUT, 0);
 228
 229         do {
 230                 if (0 > event_base_dispatch(ctx->evbase)) {
 231                         return FAILURE;
 232                 }
 233         } while (curl->unfinished && !EG(exception));
 234
 235         return SUCCESS;
 236 }
 237
 238 static void *php_http_client_curl_event_init(php_http_client_t *client)
 239 {
 240         php_http_client_curl_t *curl = client->ctx;
 241         php_http_client_curl_event_context_t *ctx;
 242         struct event_base *evb = event_base_new();
 243
 244 #if DBG_EVENTS
 245         fprintf(stderr, "I");
 246 #endif
 247
 248         if (!evb) {
 249                 return NULL;
 250         }
 251
 252         ctx = ecalloc(1, sizeof(*ctx));
 253         ctx->client = client;
 254         ctx->evbase = evb;
 255         ctx->timeout = ecalloc(1, sizeof(struct event));
 256
 257         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETDATA, ctx);
 258         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETFUNCTION, php_http_client_curl_event_socket);
 259         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERDATA, ctx);
 260         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERFUNCTION, php_http_client_curl_event_timer);
 261
 262         return ctx;
 263 }
 264
 265 static void php_http_client_curl_event_dtor(void **context)
 266 {
 267         php_http_client_curl_event_context_t *ctx = *context;
 268         php_http_client_curl_t *curl;
 269
 270 #if DBG_EVENTS
 271         fprintf(stderr, "D");
 272 #endif
 273
 274         curl = ctx->client->ctx;
 275
 276         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETDATA, NULL);
 277         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETFUNCTION, NULL);
 278         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERDATA, NULL);
 279         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERFUNCTION, NULL);
 280
 281         if (event_initialized(ctx->timeout) && event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 282                 event_del(ctx->timeout);
 283         }
 284         efree(ctx->timeout);
 285         event_base_free(ctx->evbase);
 286
 287         efree(ctx);
 288         *context = NULL;
 289 }
 290
 291 static php_http_client_curl_ops_t php_http_client_curl_event_ops = {
 292         &php_http_client_curl_event_init,
 293         &php_http_client_curl_event_dtor,
 294         &php_http_client_curl_event_once,
 295         &php_http_client_curl_event_wait,
 296         &php_http_client_curl_event_exec,
 297 };
 298
 299 php_http_client_curl_ops_t *php_http_client_curl_event_ops_get()
 300 {
 301         return &php_http_client_curl_event_ops;
 302 }
 303
 304 #endif /* PHP_HTTP_HAVE_LIBEVENT */
 305 #endif /* PHP_HTTP_HAVE_LIBCURL */
 306
 307 /*
 308  * Local variables:
 309  * tab-width: 4
 310  * c-basic-offset: 4
 311  * End:
 312  * vim600: noet sw=4 ts=4 fdm=marker
 313  * vim<600: noet sw=4 ts=4
 314  */