1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
/* <DESC>
* multi interface and debug callback
* </DESC>
*/
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
#define TRUE 1
static void dump(const char *text, FILE *stream, const unsigned char *ptr,
size_t size, char nohex)
{
size_t i;
size_t c;
unsigned int width = 0x10;
if(nohex)
/* without the hex output, we can fit more on screen */
width = 0x40;
fprintf(stream, "%s, %10.10lu bytes (0x%8.8lx)\n",
text, (unsigned long)size, (unsigned long)size);
for(i = 0; i < size; i += width) {
fprintf(stream, "%4.4lx: ", (unsigned long)i);
if(!nohex) {
/* hex not disabled, show it */
for(c = 0; c < width; c++)
if(i + c < size)
fprintf(stream, "%02x ", ptr[i + c]);
else
fputs(" ", stream);
}
for(c = 0; (c < width) && (i + c < size); c++) {
/* check for 0D0A; if found, skip past and start a new line of output */
if(nohex && (i + c + 1 < size) && ptr[i + c] == 0x0D &&
ptr[i + c + 1] == 0x0A) {
i += (c + 2 - width);
break;
}
fprintf(stream, "%c",
(ptr[i + c] >= 0x20) && (ptr[i + c] < 0x80) ? ptr[i + c] : '.');
/* check again for 0D0A, to avoid an extra \n if it is at width */
if(nohex && (i + c + 2 < size) && ptr[i + c + 1] == 0x0D &&
ptr[i + c + 2] == 0x0A) {
i += (c + 3 - width);
break;
}
}
fputc('\n', stream); /* newline */
}
fflush(stream);
}
static int my_trace(CURL *curl, curl_infotype type,
unsigned char *data, size_t size,
void *userp)
{
const char *text;
(void)userp;
(void)curl;
switch(type) {
case CURLINFO_TEXT:
fprintf(stderr, "== Info: %s", data);
return 0;
case CURLINFO_HEADER_OUT:
text = "=> Send header";
break;
case CURLINFO_DATA_OUT:
text = "=> Send data";
break;
case CURLINFO_HEADER_IN:
text = "<= Recv header";
break;
case CURLINFO_DATA_IN:
text = "<= Recv data";
break;
default: /* in case a new one is introduced to shock us */
return 0;
}
dump(text, stderr, data, size, TRUE);
return 0;
}
/*
* Simply download an HTTP file.
*/
int main(void)
{
CURL *curl;
CURLcode result = curl_global_init(CURL_GLOBAL_ALL);
if(result)
return (int)result;
curl = curl_easy_init();
if(curl) {
CURLM *multi;
/* set the options (I left out a few, you get the point anyway) */
curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
/* init a multi stack */
multi = curl_multi_init();
if(multi) {
int still_running = 0; /* keep number of running handles */
/* add the individual transfers */
curl_multi_add_handle(multi, curl);
do {
CURLMcode mresult = curl_multi_perform(multi, &still_running);
if(still_running)
/* wait for activity, timeout or "nothing" */
mresult = curl_multi_poll(multi, NULL, 0, 1000, NULL);
if(mresult)
break;
} while(still_running);
curl_multi_cleanup(multi);
}
curl_easy_cleanup(curl);
}
curl_global_cleanup();
return 0;
}
|
