Annotation of embedaddon/curl/docs/examples/http2-upload.c, revision 1.1.1.1
1.1 misho 1: /***************************************************************************
2: * _ _ ____ _
3: * Project ___| | | | _ \| |
4: * / __| | | | |_) | |
5: * | (__| |_| | _ <| |___
6: * \___|\___/|_| \_\_____|
7: *
8: * Copyright (C) 1998 - 2019, 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.haxx.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 uploads over a single connection
24: * </DESC>
25: */
26: #include <stdio.h>
27: #include <stdlib.h>
28: #include <string.h>
29: #include <fcntl.h>
30: #include <sys/stat.h>
31:
32: /* somewhat unix-specific */
33: #include <sys/time.h>
34: #include <unistd.h>
35:
36: /* curl stuff */
37: #include <curl/curl.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: #define NUM_HANDLES 1000
47:
48: struct input {
49: FILE *in;
50: size_t bytes_read; /* count up */
51: CURL *hnd;
52: int num;
53: };
54:
55: static
56: void dump(const char *text, int num, unsigned char *ptr, size_t size,
57: char nohex)
58: {
59: size_t i;
60: size_t c;
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
104: int my_trace(CURL *handle, curl_infotype type,
105: char *data, size_t size,
106: void *userp)
107: {
108: char timebuf[60];
109: const char *text;
110: struct input *i = (struct input *)userp;
111: int num = i->num;
112: static time_t epoch_offset;
113: static int known_offset;
114: struct timeval tv;
115: time_t secs;
116: struct tm *now;
117: (void)handle; /* prevent compiler warning */
118:
119: gettimeofday(&tv, NULL);
120: if(!known_offset) {
121: epoch_offset = time(NULL) - tv.tv_sec;
122: known_offset = 1;
123: }
124: secs = epoch_offset + tv.tv_sec;
125: now = localtime(&secs); /* not thread safe but we don't care */
126: snprintf(timebuf, sizeof(timebuf), "%02d:%02d:%02d.%06ld",
127: now->tm_hour, now->tm_min, now->tm_sec, (long)tv.tv_usec);
128:
129: switch(type) {
130: case CURLINFO_TEXT:
131: fprintf(stderr, "%s [%d] Info: %s", timebuf, num, data);
132: /* FALLTHROUGH */
133: default: /* in case a new one is introduced to shock us */
134: return 0;
135:
136: case CURLINFO_HEADER_OUT:
137: text = "=> Send header";
138: break;
139: case CURLINFO_DATA_OUT:
140: text = "=> Send data";
141: break;
142: case CURLINFO_SSL_DATA_OUT:
143: text = "=> Send SSL data";
144: break;
145: case CURLINFO_HEADER_IN:
146: text = "<= Recv header";
147: break;
148: case CURLINFO_DATA_IN:
149: text = "<= Recv data";
150: break;
151: case CURLINFO_SSL_DATA_IN:
152: text = "<= Recv SSL data";
153: break;
154: }
155:
156: dump(text, num, (unsigned char *)data, size, 1);
157: return 0;
158: }
159:
160: static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
161: {
162: struct input *i = userp;
163: size_t retcode = fread(ptr, size, nmemb, i->in);
164: i->bytes_read += retcode;
165: return retcode;
166: }
167:
168: static void setup(struct input *i, int num, const char *upload)
169: {
170: FILE *out;
171: char url[256];
172: char filename[128];
173: struct stat file_info;
174: curl_off_t uploadsize;
175: CURL *hnd;
176:
177: hnd = i->hnd = curl_easy_init();
178: i->num = num;
179: snprintf(filename, 128, "dl-%d", num);
180: out = fopen(filename, "wb");
181:
182: snprintf(url, 256, "https://localhost:8443/upload-%d", num);
183:
184: /* get the file size of the local file */
185: stat(upload, &file_info);
186: uploadsize = file_info.st_size;
187:
188: i->in = fopen(upload, "rb");
189:
190: /* write to this file */
191: curl_easy_setopt(hnd, CURLOPT_WRITEDATA, out);
192:
193: /* we want to use our own read function */
194: curl_easy_setopt(hnd, CURLOPT_READFUNCTION, read_callback);
195: /* read from this file */
196: curl_easy_setopt(hnd, CURLOPT_READDATA, i);
197: /* provide the size of the upload */
198: curl_easy_setopt(hnd, CURLOPT_INFILESIZE_LARGE, uploadsize);
199:
200: /* send in the URL to store the upload as */
201: curl_easy_setopt(hnd, CURLOPT_URL, url);
202:
203: /* upload please */
204: curl_easy_setopt(hnd, CURLOPT_UPLOAD, 1L);
205:
206: /* please be verbose */
207: curl_easy_setopt(hnd, CURLOPT_VERBOSE, 1L);
208: curl_easy_setopt(hnd, CURLOPT_DEBUGFUNCTION, my_trace);
209: curl_easy_setopt(hnd, CURLOPT_DEBUGDATA, i);
210:
211: /* HTTP/2 please */
212: curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
213:
214: /* we use a self-signed test server, skip verification during debugging */
215: curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
216: curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
217:
218: #if (CURLPIPE_MULTIPLEX > 0)
219: /* wait for pipe connection to confirm */
220: curl_easy_setopt(hnd, CURLOPT_PIPEWAIT, 1L);
221: #endif
222: }
223:
224: /*
225: * Upload all files over HTTP/2, using the same physical connection!
226: */
227: int main(int argc, char **argv)
228: {
229: struct input trans[NUM_HANDLES];
230: CURLM *multi_handle;
231: int i;
232: int still_running = 0; /* keep number of running handles */
233: const char *filename = "index.html";
234: int num_transfers;
235:
236: if(argc > 1) {
237: /* if given a number, do that many transfers */
238: num_transfers = atoi(argv[1]);
239:
240: if(!num_transfers || (num_transfers > NUM_HANDLES))
241: num_transfers = 3; /* a suitable low default */
242:
243: if(argc > 2)
244: /* if given a file name, upload this! */
245: filename = argv[2];
246: }
247: else
248: num_transfers = 3;
249:
250: /* init a multi stack */
251: multi_handle = curl_multi_init();
252:
253: for(i = 0; i<num_transfers; i++) {
254: setup(&trans[i], i, filename);
255:
256: /* add the individual transfer */
257: curl_multi_add_handle(multi_handle, trans[i].hnd);
258: }
259:
260: curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
261:
262: /* We do HTTP/2 so let's stick to one connection per host */
263: curl_multi_setopt(multi_handle, CURLMOPT_MAX_HOST_CONNECTIONS, 1L);
264:
265: /* we start some action by calling perform right away */
266: curl_multi_perform(multi_handle, &still_running);
267:
268: while(still_running) {
269: struct timeval timeout;
270: int rc; /* select() return code */
271: CURLMcode mc; /* curl_multi_fdset() return code */
272:
273: fd_set fdread;
274: fd_set fdwrite;
275: fd_set fdexcep;
276: int maxfd = -1;
277:
278: long curl_timeo = -1;
279:
280: FD_ZERO(&fdread);
281: FD_ZERO(&fdwrite);
282: FD_ZERO(&fdexcep);
283:
284: /* set a suitable timeout to play around with */
285: timeout.tv_sec = 1;
286: timeout.tv_usec = 0;
287:
288: curl_multi_timeout(multi_handle, &curl_timeo);
289: if(curl_timeo >= 0) {
290: timeout.tv_sec = curl_timeo / 1000;
291: if(timeout.tv_sec > 1)
292: timeout.tv_sec = 1;
293: else
294: timeout.tv_usec = (curl_timeo % 1000) * 1000;
295: }
296:
297: /* get file descriptors from the transfers */
298: mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
299:
300: if(mc != CURLM_OK) {
301: fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
302: break;
303: }
304:
305: /* On success the value of maxfd is guaranteed to be >= -1. We call
306: select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
307: no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
308: to sleep 100ms, which is the minimum suggested value in the
309: curl_multi_fdset() doc. */
310:
311: if(maxfd == -1) {
312: #ifdef _WIN32
313: Sleep(100);
314: rc = 0;
315: #else
316: /* Portable sleep for platforms other than Windows. */
317: struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
318: rc = select(0, NULL, NULL, NULL, &wait);
319: #endif
320: }
321: else {
322: /* Note that on some platforms 'timeout' may be modified by select().
323: If you need access to the original value save a copy beforehand. */
324: rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
325: }
326:
327: switch(rc) {
328: case -1:
329: /* select error */
330: break;
331: case 0:
332: default:
333: /* timeout or readable/writable sockets */
334: curl_multi_perform(multi_handle, &still_running);
335: break;
336: }
337: }
338:
339: curl_multi_cleanup(multi_handle);
340:
341: for(i = 0; i<num_transfers; i++) {
342: curl_multi_remove_handle(multi_handle, trans[i].hnd);
343: curl_easy_cleanup(trans[i].hnd);
344: }
345:
346: return 0;
347: }
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