1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2020, 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.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
28struct 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
35static 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
57static 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
66static 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
82int test(char *URL)
83{
84 CURL *curls = NULL;
85 int i = 0;
86 int res = 0;
87 struct transfer_status st;
88
89 start_test_timing();
90
91 memset(&st, 0, sizeof(st));
92
93 global_init(CURL_GLOBAL_ALL);
94
95 easy_init(curls);
96 st.easy = curls; /* to allow callbacks access */
97
98 easy_setopt(curls, CURLOPT_URL, URL);
99 easy_setopt(curls, CURLOPT_WRITEFUNCTION, write_callback);
100 easy_setopt(curls, CURLOPT_WRITEDATA, &st);
101 easy_setopt(curls, CURLOPT_HEADERFUNCTION, header_callback);
102 easy_setopt(curls, CURLOPT_HEADERDATA, &st);
103
104 easy_setopt(curls, CURLOPT_XFERINFOFUNCTION, please_continue);
105 easy_setopt(curls, CURLOPT_XFERINFODATA, &st);
106 easy_setopt(curls, CURLOPT_NOPROGRESS, 0L);
107
108 res = curl_easy_perform(curls);
109
110test_cleanup:
111
112 curl_easy_cleanup(curls);
113 curl_global_cleanup();
114
115 if(res)
116 i = res;
117
118 return i; /* return the final return code */
119}
120