1 /***************************************************************************
2  *                                  _   _ ____  _
3  *  Project                     ___| | | |  _ \| |
4  *                             / __| | | | |_) | |
5  *                            | (__| |_| |  _ <| |___
6  *                             \___|\___/|_| \_\_____|
7  *
8  * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@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