1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2021, 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 /* <DESC>
23 * Multiplexed HTTP/2 downloads over a single connection
24 * </DESC>
25 */
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <errno.h>
30
31 /* somewhat unix-specific */
32 #include <sys/time.h>
33 #include <unistd.h>
34
35 /* curl stuff */
36 #include <curl/curl.h>
37 #include <curl/mprintf.h>
38
39 #ifndef CURLPIPE_MULTIPLEX
40 /* This little trick will just make sure that we don't enable pipelining for
41 libcurls old enough to not have this symbol. It is _not_ defined to zero in
42 a recent libcurl header. */
43 #define CURLPIPE_MULTIPLEX 0
44 #endif
45
46 struct transfer {
47 CURL *easy;
48 unsigned int num;
49 FILE *out;
50 };
51
52 #define NUM_HANDLES 1000
53
54 static
dump(const char * text,int num,unsigned char * ptr,size_t size,char nohex)55 void dump(const char *text, int num, unsigned char *ptr, size_t size,
56 char nohex)
57 {
58 size_t i;
59 size_t c;
60
61 unsigned int width = 0x10;
62
63 if(nohex)
64 /* without the hex output, we can fit more on screen */
65 width = 0x40;
66
67 fprintf(stderr, "%d %s, %lu bytes (0x%lx)\n",
68 num, text, (unsigned long)size, (unsigned long)size);
69
70 for(i = 0; i<size; i += width) {
71
72 fprintf(stderr, "%4.4lx: ", (unsigned long)i);
73
74 if(!nohex) {
75 /* hex not disabled, show it */
76 for(c = 0; c < width; c++)
77 if(i + c < size)
78 fprintf(stderr, "%02x ", ptr[i + c]);
79 else
80 fputs(" ", stderr);
81 }
82
83 for(c = 0; (c < width) && (i + c < size); c++) {
84 /* check for 0D0A; if found, skip past and start a new line of output */
85 if(nohex && (i + c + 1 < size) && ptr[i + c] == 0x0D &&
86 ptr[i + c + 1] == 0x0A) {
87 i += (c + 2 - width);
88 break;
89 }
90 fprintf(stderr, "%c",
91 (ptr[i + c] >= 0x20) && (ptr[i + c]<0x80)?ptr[i + c]:'.');
92 /* check again for 0D0A, to avoid an extra \n if it's at width */
93 if(nohex && (i + c + 2 < size) && ptr[i + c + 1] == 0x0D &&
94 ptr[i + c + 2] == 0x0A) {
95 i += (c + 3 - width);
96 break;
97 }
98 }
99 fputc('\n', stderr); /* newline */
100 }
101 }
102
103 static
my_trace(CURL * handle,curl_infotype type,char * data,size_t size,void * userp)104 int my_trace(CURL *handle, curl_infotype type,
105 char *data, size_t size,
106 void *userp)
107 {
108 const char *text;
109 struct transfer *t = (struct transfer *)userp;
110 unsigned int num = t->num;
111 (void)handle; /* prevent compiler warning */
112
113 switch(type) {
114 case CURLINFO_TEXT:
115 fprintf(stderr, "== %u Info: %s", num, data);
116 /* FALLTHROUGH */
117 default: /* in case a new one is introduced to shock us */
118 return 0;
119
120 case CURLINFO_HEADER_OUT:
121 text = "=> Send header";
122 break;
123 case CURLINFO_DATA_OUT:
124 text = "=> Send data";
125 break;
126 case CURLINFO_SSL_DATA_OUT:
127 text = "=> Send SSL data";
128 break;
129 case CURLINFO_HEADER_IN:
130 text = "<= Recv header";
131 break;
132 case CURLINFO_DATA_IN:
133 text = "<= Recv data";
134 break;
135 case CURLINFO_SSL_DATA_IN:
136 text = "<= Recv SSL data";
137 break;
138 }
139
140 dump(text, num, (unsigned char *)data, size, 1);
141 return 0;
142 }
143
setup(struct transfer * t,int num)144 static void setup(struct transfer *t, int num)
145 {
146 char filename[128];
147 CURL *hnd;
148
149 hnd = t->easy = curl_easy_init();
150
151 curl_msnprintf(filename, 128, "dl-%d", num);
152
153 t->out = fopen(filename, "wb");
154 if(!t->out) {
155 fprintf(stderr, "error: could not open file %s for writing: %s\n",
156 filename, strerror(errno));
157 exit(1);
158 }
159
160 /* write to this file */
161 curl_easy_setopt(hnd, CURLOPT_WRITEDATA, t->out);
162
163 /* set the same URL */
164 curl_easy_setopt(hnd, CURLOPT_URL, "https://localhost:8443/index.html");
165
166 /* please be verbose */
167 curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
168 curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
169 curl_easy_setopt(hnd, CURLOPT_DEBUGDATA, t);
170
171 /* HTTP/2 please */
172 curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
173
174 /* we use a self-signed test server, skip verification during debugging */
175 curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
176 curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
177
178 #if (CURLPIPE_MULTIPLEX > 0)
179 /* wait for pipe connection to confirm */
180 curl_easy_setopt(hnd, CURLOPT_PIPEWAIT, 1L);
181 #endif
182 }
183
184 /*
185 * Download many transfers over HTTP/2, using the same connection!
186 */
main(int argc,char ** argv)187 int main(int argc, char **argv)
188 {
189 struct transfer trans[NUM_HANDLES];
190 CURLM *multi_handle;
191 int i;
192 int still_running = 0; /* keep number of running handles */
193 int num_transfers;
194 if(argc > 1) {
195 /* if given a number, do that many transfers */
196 num_transfers = atoi(argv[1]);
197 if((num_transfers < 1) || (num_transfers > NUM_HANDLES))
198 num_transfers = 3; /* a suitable low default */
199 }
200 else
201 num_transfers = 3; /* suitable default */
202
203 /* init a multi stack */
204 multi_handle = curl_multi_init();
205
206 for(i = 0; i < num_transfers; i++) {
207 setup(&trans[i], i);
208
209 /* add the individual transfer */
210 curl_multi_add_handle(multi_handle, trans[i].easy);
211 }
212
213 curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
214
215 do {
216 CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
217
218 if(still_running)
219 /* wait for activity, timeout or "nothing" */
220 mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
221
222 if(mc)
223 break;
224 } while(still_running);
225
226 for(i = 0; i < num_transfers; i++) {
227 curl_multi_remove_handle(multi_handle, trans[i].easy);
228 curl_easy_cleanup(trans[i].easy);
229 }
230
231 curl_multi_cleanup(multi_handle);
232
233 return 0;
234 }
235