1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 /* <DESC>
25 * multi interface and debug callback
26 * </DESC>
27 */
28
29 #include <stdio.h>
30 #include <string.h>
31
32 /* curl stuff */
33 #include <curl/curl.h>
34
35 #define TRUE 1
36
dump(const char * text,FILE * stream,unsigned char * ptr,size_t size,char nohex)37 static void dump(const char *text, FILE *stream, unsigned char *ptr,
38 size_t size, char nohex)
39 {
40 size_t i;
41 size_t c;
42
43 unsigned int width = 0x10;
44
45 if(nohex)
46 /* without the hex output, we can fit more on screen */
47 width = 0x40;
48
49 fprintf(stream, "%s, %10.10lu bytes (0x%8.8lx)\n",
50 text, (unsigned long)size, (unsigned long)size);
51
52 for(i = 0; i < size; i += width) {
53
54 fprintf(stream, "%4.4lx: ", (unsigned long)i);
55
56 if(!nohex) {
57 /* hex not disabled, show it */
58 for(c = 0; c < width; c++)
59 if(i + c < size)
60 fprintf(stream, "%02x ", ptr[i + c]);
61 else
62 fputs(" ", stream);
63 }
64
65 for(c = 0; (c < width) && (i + c < size); c++) {
66 /* check for 0D0A; if found, skip past and start a new line of output */
67 if(nohex && (i + c + 1 < size) && ptr[i + c] == 0x0D &&
68 ptr[i + c + 1] == 0x0A) {
69 i += (c + 2 - width);
70 break;
71 }
72 fprintf(stream, "%c",
73 (ptr[i + c] >= 0x20) && (ptr[i + c] < 0x80) ? ptr[i + c] : '.');
74 /* check again for 0D0A, to avoid an extra \n if it's at width */
75 if(nohex && (i + c + 2 < size) && ptr[i + c + 1] == 0x0D &&
76 ptr[i + c + 2] == 0x0A) {
77 i += (c + 3 - width);
78 break;
79 }
80 }
81 fputc('\n', stream); /* newline */
82 }
83 fflush(stream);
84 }
85
86 static
my_trace(CURL * handle,curl_infotype type,unsigned char * data,size_t size,void * userp)87 int my_trace(CURL *handle, curl_infotype type,
88 unsigned char *data, size_t size,
89 void *userp)
90 {
91 const char *text;
92
93 (void)userp;
94 (void)handle; /* prevent compiler warning */
95
96 switch(type) {
97 case CURLINFO_TEXT:
98 fprintf(stderr, "== Info: %s", data);
99 return 0;
100 case CURLINFO_HEADER_OUT:
101 text = "=> Send header";
102 break;
103 case CURLINFO_DATA_OUT:
104 text = "=> Send data";
105 break;
106 case CURLINFO_HEADER_IN:
107 text = "<= Recv header";
108 break;
109 case CURLINFO_DATA_IN:
110 text = "<= Recv data";
111 break;
112 default: /* in case a new one is introduced to shock us */
113 return 0;
114 }
115
116 dump(text, stderr, data, size, TRUE);
117 return 0;
118 }
119
120 /*
121 * Simply download an HTTP file.
122 */
main(void)123 int main(void)
124 {
125 CURL *http_handle;
126 CURLM *multi_handle;
127
128 int still_running = 0; /* keep number of running handles */
129
130 http_handle = curl_easy_init();
131
132 /* set the options (I left out a few, you get the point anyway) */
133 curl_easy_setopt(http_handle, CURLOPT_URL, "https://www.example.com/");
134
135 curl_easy_setopt(http_handle, CURLOPT_DEBUGFUNCTION, my_trace);
136 curl_easy_setopt(http_handle, CURLOPT_VERBOSE, 1L);
137
138 /* init a multi stack */
139 multi_handle = curl_multi_init();
140
141 /* add the individual transfers */
142 curl_multi_add_handle(multi_handle, http_handle);
143
144 do {
145 CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
146
147 if(still_running)
148 /* wait for activity, timeout or "nothing" */
149 mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
150
151 if(mc)
152 break;
153
154 } while(still_running);
155
156 curl_multi_cleanup(multi_handle);
157
158 curl_easy_cleanup(http_handle);
159
160 return 0;
161 }
162
