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 #include "php_http_client.h"
  15 #include "php_http_client_curl.h"
  16
  17 #if PHP_HTTP_HAVE_CURL
  18 #if PHP_HTTP_HAVE_EVENT
  19 #       if !PHP_HTTP_HAVE_EVENT2 && /* just be really sure */ !(LIBEVENT_VERSION_NUMBER >= 0x02000000)
  20 #               include <event.h>
  21 #               define event_base_new event_init
  22 #               define event_assign(e, b, s, a, cb, d) do {\
  23                         event_set(e, s, a, cb, d); \
  24                         event_base_set(b, e); \
  25                 } while(0)
  26 #       else
  27 #               if PHP_HTTP_HAVE_EVENT2
  28 #                       include <event2/event.h>
  29 #                       include <event2/event_struct.h>
  30 #               else
  31 #                       error "libevent presence is unknown"
  32 #               endif
  33 #       endif
  34 #       ifndef DBG_EVENTS
  35 #               define DBG_EVENTS 0
  36 #       endif
  37
  38 typedef struct php_http_client_curl_event_context {
  39         php_http_client_t *client;
  40         struct event_base *evbase;
  41         struct event *timeout;
  42 } php_http_client_curl_event_context_t;
  43
  44 typedef struct php_http_client_curl_event_ev {
  45         struct event evnt;
  46         php_http_client_curl_event_context_t *context;
  47 } php_http_client_curl_event_ev_t;
  48
  49 static inline int etoca(short action) {
  50         switch (action & (EV_READ|EV_WRITE)) {
  51                 case EV_READ:
  52                         return CURL_CSELECT_IN;
  53                         break;
  54                 case EV_WRITE:
  55                         return CURL_CSELECT_OUT;
  56                         break;
  57                 case EV_READ|EV_WRITE:
  58                         return CURL_CSELECT_IN|CURL_CSELECT_OUT;
  59                         break;
  60                 default:
  61                         return 0;
  62         }
  63 }
  64
  65 static void php_http_client_curl_event_handler(void *context, curl_socket_t s, int curl_action)
  66 {
  67         CURLMcode rc;
  68         php_http_client_curl_event_context_t *ctx = context;
  69         php_http_client_curl_t *curl = ctx->client->ctx;
  70         TSRMLS_FETCH_FROM_CTX(ctx->client->ts);
  71
  72 #if DBG_EVENTS
  73         fprintf(stderr, "H");
  74 #endif
  75
  76         do {
  77                 rc = curl_multi_socket_action(curl->handle->multi, s, curl_action, &curl->unfinished);
  78         } while (CURLM_CALL_MULTI_PERFORM == rc);
  79
  80         if (CURLM_OK != rc) {
  81                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s",  curl_multi_strerror(rc));
  82         }
  83
  84         php_http_client_curl_responsehandler(ctx->client);
  85 }
  86
  87 static void php_http_client_curl_event_timeout_callback(int socket, short action, void *event_data)
  88 {
  89 #if DBG_EVENTS
  90         fprintf(stderr, "T");
  91 #endif
  92
  93         /* ignore and use -1,0 on timeout */
  94         (void) socket;
  95         (void) action;
  96
  97         php_http_client_curl_event_handler(event_data, CURL_SOCKET_TIMEOUT, 0);
  98 }
  99
 100 static void php_http_client_curl_event_timer(CURLM *multi, long timeout_ms, void *timer_data)
 101 {
 102         php_http_client_curl_event_context_t *context = timer_data;
 103
 104 #if DBG_EVENTS
 105         fprintf(stderr, "\ntimer <- timeout_ms: %ld\n", timeout_ms);
 106 #endif
 107
 108         if (timeout_ms < 0) {
 109                 php_http_client_curl_event_handler(context, CURL_SOCKET_TIMEOUT, 0);
 110         } else if (timeout_ms > 0 || !event_initialized(context->timeout) || !event_pending(context->timeout, EV_TIMEOUT, NULL)) {
 111                 struct timeval timeout;
 112
 113                 if (!event_initialized(context->timeout)) {
 114                         event_assign(context->timeout, context->evbase, CURL_SOCKET_TIMEOUT, 0, php_http_client_curl_event_timeout_callback, context);
 115                 }
 116
 117                 timeout.tv_sec = timeout_ms / 1000;
 118                 timeout.tv_usec = (timeout_ms % 1000) * 1000;
 119
 120                 event_add(context->timeout, &timeout);
 121         }
 122 }
 123
 124 static void php_http_client_curl_event_callback(int socket, short action, void *event_data)
 125 {
 126         php_http_client_curl_event_context_t *ctx = event_data;
 127         php_http_client_curl_t *curl = ctx->client->ctx;
 128
 129 #if DBG_EVENTS
 130         fprintf(stderr, "E");
 131 #endif
 132
 133         php_http_client_curl_event_handler(event_data, socket, etoca(action));
 134
 135         /* remove timeout if there are no transfers left */
 136         if (!curl->unfinished && event_initialized(ctx->timeout) && event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 137                 event_del(ctx->timeout);
 138         }
 139 }
 140
 141 static int php_http_client_curl_event_socket(CURL *easy, curl_socket_t sock, int action, void *socket_data, void *assign_data)
 142 {
 143         php_http_client_curl_event_context_t *ctx = socket_data;
 144         php_http_client_curl_t *curl = ctx->client->ctx;
 145         int events = EV_PERSIST;
 146         php_http_client_curl_event_ev_t *ev = assign_data;
 147         TSRMLS_FETCH_FROM_CTX(ctx->client->ts);
 148
 149 #if DBG_EVENTS
 150         fprintf(stderr, "S");
 151 #endif
 152
 153         if (!ev) {
 154                 ev = ecalloc(1, sizeof(*ev));
 155                 ev->context = ctx;
 156                 curl_multi_assign(curl->handle->multi, sock, ev);
 157         } else {
 158                 event_del(&ev->evnt);
 159         }
 160
 161         switch (action) {
 162                 case CURL_POLL_IN:
 163                         events |= EV_READ;
 164                         break;
 165                 case CURL_POLL_OUT:
 166                         events |= EV_WRITE;
 167                         break;
 168                 case CURL_POLL_INOUT:
 169                         events |= EV_READ|EV_WRITE;
 170                         break;
 171
 172                 case CURL_POLL_REMOVE:
 173                         efree(ev);
 174                         /* no break */
 175                 case CURL_POLL_NONE:
 176                         return 0;
 177
 178                 default:
 179                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unknown socket action %d", action);
 180                         return -1;
 181         }
 182
 183         event_assign(&ev->evnt, ctx->evbase, sock, events, php_http_client_curl_event_callback, ctx);
 184         event_add(&ev->evnt, NULL);
 185
 186         return 0;
 187 }
 188
 189 static ZEND_RESULT_CODE php_http_client_curl_event_once(void *context)
 190 {
 191         php_http_client_curl_event_context_t *ctx = context;
 192
 193 #if DBG_EVENTS
 194         fprintf(stderr, "O");
 195 #endif
 196
 197         if (0 > event_base_loop(ctx->evbase, EVLOOP_NONBLOCK)) {
 198                 return FAILURE;
 199         }
 200         return SUCCESS;
 201 }
 202
 203 static ZEND_RESULT_CODE php_http_client_curl_event_wait(void *context, struct timeval *custom_timeout)
 204 {
 205         php_http_client_curl_event_context_t *ctx = context;
 206         struct timeval timeout;
 207
 208 #if DBG_EVENTS
 209         fprintf(stderr, "W");
 210 #endif
 211
 212         if (!event_initialized(ctx->timeout)) {
 213                 if (0 > event_assign(ctx->timeout, ctx->evbase, CURL_SOCKET_TIMEOUT, 0, php_http_client_curl_event_timeout_callback, ctx)) {
 214                         return FAILURE;
 215                 }
 216         } else if (custom_timeout && timerisset(custom_timeout)) {
 217                 if (0 > event_add(ctx->timeout, custom_timeout)) {
 218                         return FAILURE;
 219                 }
 220         } else if (!event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 221                 php_http_client_curl_get_timeout(ctx->client->ctx, 1000, &timeout);
 222                 if (0 > event_add(ctx->timeout, &timeout)) {
 223                         return FAILURE;
 224                 }
 225         }
 226
 227         if (0 > event_base_loop(ctx->evbase, EVLOOP_ONCE)) {
 228                 return FAILURE;
 229         }
 230
 231         return SUCCESS;
 232 }
 233
 234 static ZEND_RESULT_CODE php_http_client_curl_event_exec(void *context)
 235 {
 236         php_http_client_curl_event_context_t *ctx = context;
 237         php_http_client_curl_t *curl = ctx->client->ctx;
 238         TSRMLS_FETCH_FROM_CTX(ctx->client->ts);
 239
 240 #if DBG_EVENTS
 241         fprintf(stderr, "E");
 242 #endif
 243
 244         /* kickstart */
 245         php_http_client_curl_event_handler(ctx, CURL_SOCKET_TIMEOUT, 0);
 246
 247         do {
 248                 if (0 > event_base_dispatch(ctx->evbase)) {
 249                         return FAILURE;
 250                 }
 251         } while (curl->unfinished && !EG(exception));
 252
 253         return SUCCESS;
 254 }
 255
 256 static void *php_http_client_curl_event_init(php_http_client_t *client)
 257 {
 258         php_http_client_curl_t *curl = client->ctx;
 259         php_http_client_curl_event_context_t *ctx;
 260         struct event_base *evb = event_base_new();
 261
 262 #if DBG_EVENTS
 263         fprintf(stderr, "I");
 264 #endif
 265
 266         if (!evb) {
 267                 return NULL;
 268         }
 269
 270         ctx = ecalloc(1, sizeof(*ctx));
 271         ctx->client = client;
 272         ctx->evbase = evb;
 273         ctx->timeout = ecalloc(1, sizeof(struct event));
 274
 275         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETDATA, ctx);
 276         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETFUNCTION, php_http_client_curl_event_socket);
 277         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERDATA, ctx);
 278         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERFUNCTION, php_http_client_curl_event_timer);
 279
 280         return ctx;
 281 }
 282
 283 static void php_http_client_curl_event_dtor(void **context)
 284 {
 285         php_http_client_curl_event_context_t *ctx = *context;
 286         php_http_client_curl_t *curl;
 287
 288 #if DBG_EVENTS
 289         fprintf(stderr, "D");
 290 #endif
 291
 292         ZEND_ASSERT(ctx);
 293
 294         curl = ctx->client->ctx;
 295
 296         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETDATA, NULL);
 297         curl_multi_setopt(curl->handle->multi, CURLMOPT_SOCKETFUNCTION, NULL);
 298         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERDATA, NULL);
 299         curl_multi_setopt(curl->handle->multi, CURLMOPT_TIMERFUNCTION, NULL);
 300
 301         if (event_initialized(ctx->timeout) && event_pending(ctx->timeout, EV_TIMEOUT, NULL)) {
 302                 event_del(ctx->timeout);
 303         }
 304         efree(ctx->timeout);
 305         event_base_free(ctx->evbase);
 306
 307         efree(ctx);
 308         *context = NULL;
 309 }
 310
 311 static php_http_client_curl_ops_t php_http_client_curl_event_ops = {
 312         &php_http_client_curl_event_init,
 313         &php_http_client_curl_event_dtor,
 314         &php_http_client_curl_event_once,
 315         &php_http_client_curl_event_wait,
 316         &php_http_client_curl_event_exec,
 317 };
 318
 319 php_http_client_curl_ops_t *php_http_client_curl_event_ops_get()
 320 {
 321         return &php_http_client_curl_event_ops;
 322 }
 323
 324 #endif /* PHP_HTTP_HAVE_EVENT */
 325 #endif /* PHP_HTTP_HAVE_CURL */
 326
 327 /*
 328  * Local variables:
 329  * tab-width: 4
 330  * c-basic-offset: 4
 331  * End:
 332  * vim600: noet sw=4 ts=4 fdm=marker
 333  * vim<600: noet sw=4 ts=4
 334  */