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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel (at) haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at https://curl.haxx.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  ***************************************************************************/
     22 #include "test.h"
     23 
     24 #include "testutil.h"
     25 #include "warnless.h"
     26 #include "memdebug.h"
     27 
     28 #define TEST_HANG_TIMEOUT 60 * 1000
     29 
     30 static char const testData[] = ".abc\0xyz";
     31 static off_t const testDataSize = sizeof(testData) - 1;
     32 
     33 int test(char *URL)
     34 {
     35   CURL *easy;
     36   CURLM *multi_handle;
     37   int still_running; /* keep number of running handles */
     38   CURLMsg *msg; /* for picking up messages with the transfer status */
     39   int msgs_left; /* how many messages are left */
     40   int res = CURLE_OK;
     41 
     42   global_init(CURL_GLOBAL_ALL);
     43 
     44   /* Allocate one CURL handle per transfer */
     45   easy = curl_easy_init();
     46 
     47   /* init a multi stack */
     48   multi_handle = curl_multi_init();
     49 
     50   /* add the individual transfer */
     51   curl_multi_add_handle(multi_handle, easy);
     52 
     53   /* set the options (I left out a few, you'll get the point anyway) */
     54   curl_easy_setopt(easy, CURLOPT_URL, URL);
     55   curl_easy_setopt(easy, CURLOPT_POSTFIELDSIZE_LARGE,
     56                    (curl_off_t)testDataSize);
     57   curl_easy_setopt(easy, CURLOPT_POSTFIELDS, testData);
     58 
     59   /* we start some action by calling perform right away */
     60   curl_multi_perform(multi_handle, &still_running);
     61 
     62   do {
     63     struct timeval timeout;
     64     int rc; /* select() return code */
     65     CURLMcode mc; /* curl_multi_fdset() return code */
     66 
     67     fd_set fdread;
     68     fd_set fdwrite;
     69     fd_set fdexcep;
     70     int maxfd = -1;
     71 
     72     long curl_timeo = -1;
     73 
     74     FD_ZERO(&fdread);
     75     FD_ZERO(&fdwrite);
     76     FD_ZERO(&fdexcep);
     77 
     78     /* set a suitable timeout to play around with */
     79     timeout.tv_sec = 1;
     80     timeout.tv_usec = 0;
     81 
     82     curl_multi_timeout(multi_handle, &curl_timeo);
     83     if(curl_timeo >= 0) {
     84       timeout.tv_sec = curl_timeo / 1000;
     85       if(timeout.tv_sec > 1)
     86         timeout.tv_sec = 1;
     87       else
     88         timeout.tv_usec = (curl_timeo % 1000) * 1000;
     89     }
     90 
     91     /* get file descriptors from the transfers */
     92     mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
     93 
     94     if(mc != CURLM_OK) {
     95       fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
     96       break;
     97     }
     98 
     99     /* On success the value of maxfd is guaranteed to be >= -1. We call
    100        select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
    101        no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
    102        to sleep 100ms, which is the minimum suggested value in the
    103        curl_multi_fdset() doc. */
    104 
    105     if(maxfd == -1) {
    106 #ifdef _WIN32
    107       Sleep(100);
    108       rc = 0;
    109 #else
    110       /* Portable sleep for platforms other than Windows. */
    111       struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
    112       rc = select(0, NULL, NULL, NULL, &wait);
    113 #endif
    114     }
    115     else {
    116       /* Note that on some platforms 'timeout' may be modified by select().
    117          If you need access to the original value save a copy beforehand. */
    118       rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
    119     }
    120 
    121     switch(rc) {
    122     case -1:
    123       /* select error */
    124       break;
    125     case 0: /* timeout */
    126     default: /* action */
    127       curl_multi_perform(multi_handle, &still_running);
    128       break;
    129     }
    130   } while(still_running);
    131 
    132   /* See how the transfers went */
    133   do {
    134     msg = curl_multi_info_read(multi_handle, &msgs_left);
    135     if(msg && msg->msg == CURLMSG_DONE) {
    136       printf("HTTP transfer completed with status %d\n", msg->data.result);
    137       break;
    138     }
    139   } while(msg);
    140 
    141   curl_multi_cleanup(multi_handle);
    142 
    143   /* Free the CURL handles */
    144   curl_easy_cleanup(easy);
    145   curl_global_cleanup();
    146 
    147   return 0;
    148 }
    149 
    150