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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 struct transfer_status {
     29   CURL *easy;
     30   int halted;
     31   int counter; /* count write callback invokes */
     32   int please;  /* number of times xferinfo is called while halted */
     33 };
     34 
     35 static int please_continue(void *userp,
     36                            curl_off_t dltotal,
     37                            curl_off_t dlnow,
     38                            curl_off_t ultotal,
     39                            curl_off_t ulnow)
     40 {
     41   struct transfer_status *st = (struct transfer_status *)userp;
     42   (void)dltotal;
     43   (void)dlnow;
     44   (void)ultotal;
     45   (void)ulnow;
     46   if(st->halted) {
     47     st->please++;
     48     if(st->please == 2) {
     49       /* waited enough, unpause! */
     50       curl_easy_pause(st->easy, CURLPAUSE_CONT);
     51     }
     52   }
     53   fprintf(stderr, "xferinfo: paused %d\n", st->halted);
     54   return 0; /* go on */
     55 }
     56 
     57 static size_t header_callback(void *ptr, size_t size, size_t nmemb,
     58                               void *userp)
     59 {
     60   size_t len = size * nmemb;
     61   (void)userp;
     62   (void)fwrite(ptr, size, nmemb, stdout);
     63   return len;
     64 }
     65 
     66 static size_t write_callback(void *ptr, size_t size, size_t nmemb, void *userp)
     67 {
     68   struct transfer_status *st = (struct transfer_status *)userp;
     69   size_t len = size * nmemb;
     70   st->counter++;
     71   if(st->counter > 1) {
     72     /* the first call puts us on pause, so subsequent calls are after
     73        unpause */
     74     fwrite(ptr, size, nmemb, stdout);
     75     return len;
     76   }
     77   printf("Got %d bytes but pausing!\n", (int)len);
     78   st->halted = 1;
     79   return CURL_WRITEFUNC_PAUSE;
     80 }
     81 
     82 #define TEST_HANG_TIMEOUT 60 * 1000
     83 
     84 int test(char *URL)
     85 {
     86   CURL *curls = NULL;
     87   int i = 0;
     88   int res = 0;
     89   struct transfer_status st;
     90 
     91   start_test_timing();
     92 
     93   memset(&st, 0, sizeof(st));
     94 
     95   global_init(CURL_GLOBAL_ALL);
     96 
     97   easy_init(curls);
     98   st.easy = curls; /* to allow callbacks access */
     99 
    100   easy_setopt(curls, CURLOPT_URL, URL);
    101   easy_setopt(curls, CURLOPT_WRITEFUNCTION, write_callback);
    102   easy_setopt(curls, CURLOPT_WRITEDATA, &st);
    103   easy_setopt(curls, CURLOPT_HEADERFUNCTION, header_callback);
    104   easy_setopt(curls, CURLOPT_HEADERDATA, &st);
    105 
    106   easy_setopt(curls, CURLOPT_XFERINFOFUNCTION, please_continue);
    107   easy_setopt(curls, CURLOPT_XFERINFODATA, &st);
    108   easy_setopt(curls, CURLOPT_NOPROGRESS, 0L);
    109 
    110   res = curl_easy_perform(curls);
    111 
    112 test_cleanup:
    113 
    114   curl_easy_cleanup(curls);
    115   curl_global_cleanup();
    116 
    117   if(res)
    118     i = res;
    119 
    120   return i; /* return the final return code */
    121 }
    122