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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2016, 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 char const testData[] = ".abc\0xyz";
     31 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 
     41   /* Allocate one CURL handle per transfer */
     42   easy = curl_easy_init();
     43 
     44   /* init a multi stack */
     45   multi_handle = curl_multi_init();
     46 
     47   /* add the individual transfer */
     48   curl_multi_add_handle(multi_handle, easy);
     49 
     50   /* set the options (I left out a few, you'll get the point anyway) */
     51   curl_easy_setopt(easy, CURLOPT_URL, URL);
     52   curl_easy_setopt(easy, CURLOPT_POSTFIELDSIZE_LARGE,
     53                    (curl_off_t)testDataSize);
     54   curl_easy_setopt(easy, CURLOPT_POSTFIELDS, testData);
     55 
     56   /* we start some action by calling perform right away */
     57   curl_multi_perform(multi_handle, &still_running);
     58 
     59   do {
     60     struct timeval timeout;
     61     int rc; /* select() return code */
     62     CURLMcode mc; /* curl_multi_fdset() return code */
     63 
     64     fd_set fdread;
     65     fd_set fdwrite;
     66     fd_set fdexcep;
     67     int maxfd = -1;
     68 
     69     long curl_timeo = -1;
     70 
     71     FD_ZERO(&fdread);
     72     FD_ZERO(&fdwrite);
     73     FD_ZERO(&fdexcep);
     74 
     75     /* set a suitable timeout to play around with */
     76     timeout.tv_sec = 1;
     77     timeout.tv_usec = 0;
     78 
     79     curl_multi_timeout(multi_handle, &curl_timeo);
     80     if(curl_timeo >= 0) {
     81       timeout.tv_sec = curl_timeo / 1000;
     82       if(timeout.tv_sec > 1)
     83         timeout.tv_sec = 1;
     84       else
     85         timeout.tv_usec = (curl_timeo % 1000) * 1000;
     86     }
     87 
     88     /* get file descriptors from the transfers */
     89     mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
     90 
     91     if(mc != CURLM_OK) {
     92       fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
     93       break;
     94     }
     95 
     96     /* On success the value of maxfd is guaranteed to be >= -1. We call
     97        select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
     98        no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
     99        to sleep 100ms, which is the minimum suggested value in the
    100        curl_multi_fdset() doc. */
    101 
    102     if(maxfd == -1) {
    103 #ifdef _WIN32
    104       Sleep(100);
    105       rc = 0;
    106 #else
    107       /* Portable sleep for platforms other than Windows. */
    108       struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
    109       rc = select(0, NULL, NULL, NULL, &wait);
    110 #endif
    111     }
    112     else {
    113       /* Note that on some platforms 'timeout' may be modified by select().
    114          If you need access to the original value save a copy beforehand. */
    115       rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
    116     }
    117 
    118     switch(rc) {
    119     case -1:
    120       /* select error */
    121       break;
    122     case 0: /* timeout */
    123     default: /* action */
    124       curl_multi_perform(multi_handle, &still_running);
    125       break;
    126     }
    127   } while(still_running);
    128 
    129   /* See how the transfers went */
    130   while((msg = curl_multi_info_read(multi_handle, &msgs_left))) {
    131     if(msg->msg == CURLMSG_DONE) {
    132       printf("HTTP transfer completed with status %d\n", msg->data.result);
    133       break;
    134     }
    135   }
    136 
    137   curl_multi_cleanup(multi_handle);
    138 
    139   /* Free the CURL handles */
    140   curl_easy_cleanup(easy);
    141 
    142   return 0;
    143 }
    144 
    145