Annotation of embedaddon/curl/docs/examples/http2-upload.c, revision 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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