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         struct timeval timeout;
  88
  89 #if DBG_EVENTS
  90         fprintf(stderr, "(%ld)", timeout_ms);
  91 #endif
  92
  93         switch (timeout_ms) {
  94         case -1:
  95                 if (event_initialized(context->timeout) && event_pending(context->timeout, EV_TIMEOUT, NULL)) {
  96                         event_del(context->timeout);
  97                 }
  98                 break;
  99         case 0:
 100         default:
 101                 if (!event_initialized(context->timeout)) {
 102                         event_assign(context->timeout, context->evbase, CURL_SOCKET_TIMEOUT, 0, php_http_client_curl_event_timeout_callback, context);
 103                 }
 104
 105                 timeout.tv_sec = timeout_ms / 1000;
 106                 timeout.tv_usec = (timeout_ms % 1000) * 1000;
 107
 108                 if (!event_pending(context->timeout, EV_TIMEOUT, &timeout)) {
 109                         event_add(context->timeout, &timeout);
 110                 }
 111                 break;
 112         }
 113 }
 114
 115 static void php_http_client_curl_event_callback(int socket, short action, void *event_data)
 116 {
 117         php_http_client_curl_event_context_t *ctx = event_data;
 118         php_http_client_curl_t *curl = ctx->client->ctx;
 119
 120 #if DBG_EVENTS
 121         fprintf(stderr, "E");
 122 #endif
 123
 124         php_http_client_curl_event_handler(event_data, socket, etoca(action));
 125
 126         /* remove timeout if there are no transfers left */
 127         if (!curl->unfinished && event_initialized(ctx->timeout) && event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 128                 event_del(ctx->timeout);
 129         }
 130 }
 131
 132 static int php_http_client_curl_event_socket(CURL *easy, curl_socket_t sock, int action, void *socket_data, void *assign_data)
 133 {
 134         php_http_client_curl_event_context_t *ctx = socket_data;
 135         php_http_client_curl_t *curl = ctx->client->ctx;
 136         int events = EV_PERSIST;
 137         php_http_client_curl_event_ev_t *ev = assign_data;
 138
 139 #if DBG_EVENTS
 140         fprintf(stderr, "S");
 141 #endif
 142
 143         if (!ev) {
 144                 ev = ecalloc(1, sizeof(*ev));
 145                 ev->context = ctx;
 146                 curl_multi_assign(curl->handle->multi, sock, ev);
 147         } else {
 148                 event_del(&ev->evnt);
 149         }
 150
 151         switch (action) {
 152                 case CURL_POLL_IN:
 153                         events |= EV_READ;
 154                         break;
 155                 case CURL_POLL_OUT:
 156                         events |= EV_WRITE;
 157                         break;
 158                 case CURL_POLL_INOUT:
 159                         events |= EV_READ|EV_WRITE;
 160                         break;
 161
 162                 case CURL_POLL_REMOVE:
 163                         efree(ev);
 164                         /* no break */
 165                 case CURL_POLL_NONE:
 166                         return 0;
 167
 168                 default:
 169                         php_error_docref(NULL, E_WARNING, "Unknown socket action %d", action);
 170                         return -1;
 171         }
 172
 173         event_assign(&ev->evnt, ctx->evbase, sock, events, php_http_client_curl_event_callback, ctx);
 174         event_add(&ev->evnt, NULL);
 175
 176         return 0;
 177 }
 178
 179 static ZEND_RESULT_CODE php_http_client_curl_event_once(void *context)
 180 {
 181         php_http_client_curl_event_context_t *ctx = context;
 182
 183 #if DBG_EVENTS
 184         fprintf(stderr, "O");
 185 #endif
 186
 187         if (0 > event_base_loop(ctx->evbase, EVLOOP_NONBLOCK)) {
 188                 return FAILURE;
 189         }
 190         return SUCCESS;
 191 }
 192
 193 static ZEND_RESULT_CODE php_http_client_curl_event_wait(void *context, struct timeval *custom_timeout)
 194 {
 195         php_http_client_curl_event_context_t *ctx = context;
 196         struct timeval timeout;
 197
 198 #if DBG_EVENTS
 199         fprintf(stderr, "W");
 200 #endif
 201
 202         if (!event_initialized(ctx->timeout)) {
 203                 if (0 > event_assign(ctx->timeout, ctx->evbase, CURL_SOCKET_TIMEOUT, 0, php_http_client_curl_event_timeout_callback, ctx)) {
 204                         return FAILURE;
 205                 }
 206         } else if (custom_timeout && timerisset(custom_timeout)) {
 207                 if (0 > event_add(ctx->timeout, custom_timeout)) {
 208                         return FAILURE;
 209                 }
 210         } else if (!event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 211                 php_http_client_curl_get_timeout(ctx->client->ctx, 1000, &timeout);
 212                 if (0 > event_add(ctx->timeout, &timeout)) {
 213                         return FAILURE;
 214                 }
 215         }
 216
 217         if (0 > event_base_loop(ctx->evbase, EVLOOP_ONCE)) {
 218                 return FAILURE;
 219         }
 220
 221         return SUCCESS;
 222 }
 223
 224 static ZEND_RESULT_CODE php_http_client_curl_event_exec(void *context)
 225 {
 226         php_http_client_curl_event_context_t *ctx = context;
 227         php_http_client_curl_t *curl = ctx->client->ctx;
 228
 229 #if DBG_EVENTS
 230         fprintf(stderr, "E");
 231 #endif
 232
 233         /* kickstart */
 234         php_http_client_curl_event_handler(ctx, CURL_SOCKET_TIMEOUT, 0);
 235
 236         do {
 237                 if (0 > event_base_dispatch(ctx->evbase)) {
 238                         return FAILURE;
 239                 }
 240         } while (curl->unfinished && !EG(exception));
 241
 242         return SUCCESS;
 243 }
 244
 245 static void *php_http_client_curl_event_init(php_http_client_t *client)
 246 {
 247         php_http_client_curl_t *curl = client->ctx;
 248         php_http_client_curl_event_context_t *ctx;
 249         struct event_base *evb = event_base_new();
 250
 251 #if DBG_EVENTS
 252         fprintf(stderr, "I");
 253 #endif
 254
 255         if (!evb) {
 256                 return NULL;
 257         }
 258
 259         ctx = ecalloc(1, sizeof(*ctx));
 260         ctx->client = client;
 261         ctx->evbase = evb;
 262         ctx->timeout = ecalloc(1, sizeof(struct event));
 263
 264         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETDATA, ctx);
 265         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETFUNCTION, php_http_client_curl_event_socket);
 266         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERDATA, ctx);
 267         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERFUNCTION, php_http_client_curl_event_timer);
 268
 269         return ctx;
 270 }
 271
 272 static void php_http_client_curl_event_dtor(void **context)
 273 {
 274         php_http_client_curl_event_context_t *ctx = *context;
 275         php_http_client_curl_t *curl;
 276
 277 #if DBG_EVENTS
 278         fprintf(stderr, "D");
 279 #endif
 280
 281         curl = ctx->client->ctx;
 282
 283         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETDATA, NULL);
 284         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETFUNCTION, NULL);
 285         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERDATA, NULL);
 286         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERFUNCTION, NULL);
 287
 288         if (event_initialized(ctx->timeout) && event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 289                 event_del(ctx->timeout);
 290         }
 291         efree(ctx->timeout);
 292         event_base_free(ctx->evbase);
 293
 294         efree(ctx);
 295         *context = NULL;
 296 }
 297
 298 static php_http_client_curl_ops_t php_http_client_curl_event_ops = {
 299         &php_http_client_curl_event_init,
 300         &php_http_client_curl_event_dtor,
 301         &php_http_client_curl_event_once,
 302         &php_http_client_curl_event_wait,
 303         &php_http_client_curl_event_exec,
 304 };
 305
 306 php_http_client_curl_ops_t *php_http_client_curl_event_ops_get()
 307 {
 308         return &php_http_client_curl_event_ops;
 309 }
 310
 311 #endif /* PHP_HTTP_HAVE_LIBEVENT */
 312 #endif /* PHP_HTTP_HAVE_LIBCURL */
 313
 314 /*
 315  * Local variables:
 316  * tab-width: 4
 317  * c-basic-offset: 4
 318  * End:
 319  * vim600: noet sw=4 ts=4 fdm=marker
 320  * vim<600: noet sw=4 ts=4
 321  */