1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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 http://curl.haxx.se/docs/copyright.html.
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.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 * Multiplexed HTTP/2 downloads over a single connection
29 /* somewhat unix-specific */
34 #include <curl/curl.h>
36 #ifndef CURLPIPE_MULTIPLEX
37 /* This little trick will just make sure that we don't enable pipelining for
38 libcurls old enough to not have this symbol. It is _not_ defined to zero in
39 a recent libcurl header. */
40 #define CURLPIPE_MULTIPLEX 0
43 #define NUM_HANDLES 1000
45 void *curl_hnd[NUM_HANDLES];
48 /* a handle to number lookup, highly ineffective when we do many
50 static int hnd2num(CURL *hnd)
53 for(i=0; i< num_transfers; i++) {
54 if(curl_hnd[i] == hnd)
57 return 0; /* weird, but just a fail-safe */
61 void dump(const char *text, int num, unsigned char *ptr, size_t size,
67 unsigned int width=0x10;
70 /* without the hex output, we can fit more on screen */
73 fprintf(stderr, "%d %s, %ld bytes (0x%lx)\n",
74 num, text, (long)size, (long)size);
76 for(i=0; i<size; i+= width) {
78 fprintf(stderr, "%4.4lx: ", (long)i);
81 /* hex not disabled, show it */
82 for(c = 0; c < width; c++)
84 fprintf(stderr, "%02x ", ptr[i+c]);
89 for(c = 0; (c < width) && (i+c < size); c++) {
90 /* check for 0D0A; if found, skip past and start a new line of output */
91 if (nohex && (i+c+1 < size) && ptr[i+c]==0x0D && ptr[i+c+1]==0x0A) {
96 (ptr[i+c]>=0x20) && (ptr[i+c]<0x80)?ptr[i+c]:'.');
97 /* check again for 0D0A, to avoid an extra \n if it's at width */
98 if (nohex && (i+c+2 < size) && ptr[i+c+1]==0x0D && ptr[i+c+2]==0x0A) {
103 fputc('\n', stderr); /* newline */
108 int my_trace(CURL *handle, curl_infotype type,
109 char *data, size_t size,
113 int num = hnd2num(handle);
114 (void)handle; /* prevent compiler warning */
118 fprintf(stderr, "== %d Info: %s", num, data);
119 default: /* in case a new one is introduced to shock us */
122 case CURLINFO_HEADER_OUT:
123 text = "=> Send header";
125 case CURLINFO_DATA_OUT:
126 text = "=> Send data";
128 case CURLINFO_SSL_DATA_OUT:
129 text = "=> Send SSL data";
131 case CURLINFO_HEADER_IN:
132 text = "<= Recv header";
134 case CURLINFO_DATA_IN:
135 text = "<= Recv data";
137 case CURLINFO_SSL_DATA_IN:
138 text = "<= Recv SSL data";
142 dump(text, num, (unsigned char *)data, size, 1);
146 static void setup(CURL *hnd, int num)
151 sprintf(filename, "dl-%d", num);
153 out = fopen(filename, "wb");
155 /* write to this file */
156 curl_easy_setopt(hnd, CURLOPT_WRITEDATA, out);
158 /* set the same URL */
159 curl_easy_setopt(hnd, CURLOPT_URL, "https://localhost:8443/index.html");
161 /* send it verbose for max debuggaility */
162 curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
163 curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
166 curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
168 /* we use a self-signed test server, skip verification during debugging */
169 curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
170 curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
172 #if (CURLPIPE_MULTIPLEX > 0)
173 /* wait for pipe connection to confirm */
174 curl_easy_setopt(hnd, CURLOPT_PIPEWAIT, 1L);
181 * Simply download two files over HTTP/2, using the same physical connection!
183 int main(int argc, char **argv)
185 CURL *easy[NUM_HANDLES];
188 int still_running; /* keep number of running handles */
191 /* if given a number, do that many transfers */
192 num_transfers = atoi(argv[1]);
194 if(!num_transfers || (num_transfers > NUM_HANDLES))
195 num_transfers = 3; /* a suitable low default */
197 /* init a multi stack */
198 multi_handle = curl_multi_init();
200 for(i=0; i<num_transfers; i++) {
201 easy[i] = curl_easy_init();
205 /* add the individual transfer */
206 curl_multi_add_handle(multi_handle, easy[i]);
209 curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
211 /* we start some action by calling perform right away */
212 curl_multi_perform(multi_handle, &still_running);
215 struct timeval timeout;
216 int rc; /* select() return code */
217 CURLMcode mc; /* curl_multi_fdset() return code */
224 long curl_timeo = -1;
230 /* set a suitable timeout to play around with */
234 curl_multi_timeout(multi_handle, &curl_timeo);
235 if(curl_timeo >= 0) {
236 timeout.tv_sec = curl_timeo / 1000;
237 if(timeout.tv_sec > 1)
240 timeout.tv_usec = (curl_timeo % 1000) * 1000;
243 /* get file descriptors from the transfers */
244 mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
248 fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
252 /* On success the value of maxfd is guaranteed to be >= -1. We call
253 select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
254 no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
255 to sleep 100ms, which is the minimum suggested value in the
256 curl_multi_fdset() doc. */
263 /* Portable sleep for platforms other than Windows. */
264 struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
265 rc = select(0, NULL, NULL, NULL, &wait);
269 /* Note that on some platforms 'timeout' may be modified by select().
270 If you need access to the original value save a copy beforehand. */
271 rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
280 /* timeout or readable/writable sockets */
281 curl_multi_perform(multi_handle, &still_running);
284 } while(still_running);
286 curl_multi_cleanup(multi_handle);
288 for(i=0; i<num_transfers; i++)
289 curl_easy_cleanup(easy[i]);