1 /* vi: set sw=4 ts=4: */
3 * wget - retrieve a file using HTTP or FTP
5 * Chip Rosenthal Covad Communications <chip@laserlink.net>
17 #include <sys/ioctl.h>
20 #include <sys/types.h>
22 #include <sys/socket.h>
23 #include <netinet/in.h>
24 #include <arpa/inet.h>
29 /* Stupid libc5 doesn't define this... */
31 #define timersub(a, b, result) \
33 (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
34 (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
35 if ((result)->tv_usec < 0) { \
37 (result)->tv_usec += 1000000; \
50 static void parse_url(char *url, struct host_info *h);
51 static FILE *open_socket(char *host, int port);
52 static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
53 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
54 static void progressmeter(int flag);
56 /* Globals (can be accessed from signal handlers */
57 static off_t filesize = 0; /* content-length of the file */
58 static int chunked = 0; /* chunked transfer encoding */
59 #ifdef BB_FEATURE_WGET_STATUSBAR
60 static char *curfile; /* Name of current file being transferred. */
61 static struct timeval start; /* Time a transfer started. */
62 static volatile unsigned long statbytes; /* Number of bytes transferred so far. */
63 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
64 static const int STALLTIME = 5;
67 static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
69 if (output != stdout && do_continue==0) {
75 #define close_delete_and_die(s...) { \
76 close_and_delete_outfile(output, fname_out, do_continue); \
77 error_msg_and_die(s); }
80 #ifdef BB_FEATURE_WGET_AUTHENTICATION
82 * Base64-encode character string
83 * oops... isn't something similar in uuencode.c?
84 * It would be better to use already existing code
86 char *base64enc(char *p, char *buf, int len) {
88 char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
94 error_msg_and_die("buffer overflow");
95 *(s++) = al[(*p >> 2) & 0x3F];
96 *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
100 *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
102 *(s++) = al[*(p++) & 0x3F];
109 int wget_main(int argc, char **argv)
111 int n, try=5, status;
117 struct host_info server, target;
119 FILE *sfp = NULL; /* socket to web/ftp server */
120 FILE *dfp = NULL; /* socket to ftp server (data) */
121 char *fname_out = NULL; /* where to direct output (-O) */
122 int do_continue = 0; /* continue a prev transfer (-c) */
123 long beg_range = 0L; /* range at which continue begins */
124 int got_clen = 0; /* got content-length: from server */
125 FILE *output; /* socket to web server */
126 int quiet_flag = FALSE; /* Be verry, verry quiet... */
129 * Crack command line.
131 while ((n = getopt(argc, argv, "cqO:")) != EOF) {
140 /* can't set fname_out to NULL if outputting to stdout, because
141 * this gets interpreted as the auto-gen output filename
142 * case below - tausq@debian.org
151 if (argc - optind != 1)
154 parse_url(argv[optind], &target);
155 server.host = target.host;
156 server.port = target.port;
159 * Use the proxy if necessary.
161 proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
163 parse_url(xstrdup(proxy), &server);
165 /* Guess an output filename */
168 #ifdef BB_FEATURE_WGET_STATUSBAR
171 get_last_path_component(target.path);
172 if (fname_out==NULL || strlen(fname_out)<1) {
174 #ifdef BB_FEATURE_WGET_STATUSBAR
179 #ifdef BB_FEATURE_WGET_STATUSBAR
181 curfile = get_last_path_component(fname_out);
184 if (do_continue && !fname_out)
185 error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
189 * Open the output file stream.
191 if (strcmp(fname_out, "-") == 0) {
194 output = xfopen(fname_out, (do_continue ? "a" : "w"));
198 * Determine where to start transfer.
201 if (fstat(fileno(output), &sbuf) < 0)
202 perror_msg_and_die("fstat()");
203 if (sbuf.st_size > 0)
204 beg_range = sbuf.st_size;
209 if (proxy || !target.is_ftp) {
215 close_delete_and_die("too many redirections");
218 * Open socket to http server
220 if (sfp) fclose(sfp);
221 sfp = open_socket(server.host, server.port);
227 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
228 target.is_ftp ? "f" : "ht", target.host,
229 target.port, target.path);
231 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
234 fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
236 #ifdef BB_FEATURE_WGET_AUTHENTICATION
238 fprintf(sfp, "Authorization: Basic %s\r\n",
239 base64enc(target.user, buf, sizeof(buf)));
241 if (proxy && server.user) {
242 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
243 base64enc(server.user, buf, sizeof(buf)));
248 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
249 fprintf(sfp,"Connection: close\r\n\r\n");
252 * Retrieve HTTP response line and check for "200" status code.
254 read_response: if (fgets(buf, sizeof(buf), sfp) == NULL)
255 close_delete_and_die("no response from server");
257 for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
259 for ( ; isspace(*s) ; ++s)
261 switch (status = atoi(s)) {
264 while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
267 if (do_continue && output != stdout)
268 output = freopen(fname_out, "w", output);
271 case 300: /* redirection */
282 close_delete_and_die("server returned error %d: %s", atoi(s), buf);
286 * Retrieve HTTP headers.
288 while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
289 if (strcasecmp(buf, "content-length") == 0) {
294 if (strcasecmp(buf, "transfer-encoding") == 0) {
295 if (strcasecmp(s, "chunked") == 0) {
296 chunked = got_clen = 1;
298 close_delete_and_die("server wants to do %s transfer encoding", s);
301 if (strcasecmp(buf, "location") == 0) {
303 target.path = xstrdup(s+1);
305 parse_url(xstrdup(s), &target);
307 server.host = target.host;
308 server.port = target.port;
313 } while(status >= 300);
323 target.user = xstrdup("anonymous:busybox@");
325 sfp = open_socket(server.host, server.port);
326 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
327 close_delete_and_die("%s", buf+4);
330 * Splitting username:password pair,
333 s = strchr(target.user, ':');
336 switch(ftpcmd("USER ", target.user, sfp, buf)) {
340 if (ftpcmd("PASS ", s, sfp, buf) == 230)
342 /* FALLTHRU (failed login) */
344 close_delete_and_die("ftp login: %s", buf+4);
347 ftpcmd("CDUP", NULL, sfp, buf);
348 ftpcmd("TYPE I", NULL, sfp, buf);
353 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
354 filesize = atol(buf+4);
359 * Entering passive mode
361 if (ftpcmd("PASV", NULL, sfp, buf) != 227)
362 close_delete_and_die("PASV: %s", buf+4);
363 s = strrchr(buf, ',');
366 s = strrchr(buf, ',');
367 port += atoi(s+1) * 256;
368 dfp = open_socket(server.host, port);
371 sprintf(buf, "REST %ld", beg_range);
372 if (ftpcmd(buf, NULL, sfp, buf) != 350) {
373 if (output != stdout)
374 output = freopen(fname_out, "w", output);
377 filesize -= beg_range;
380 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
381 close_delete_and_die("RETR: %s", buf+4);
390 fgets(buf, sizeof(buf), dfp);
391 filesize = strtol(buf, (char **) NULL, 16);
394 #ifdef BB_FEATURE_WGET_STATUSBAR
396 if (quiet_flag==FALSE)
399 while ((filesize > 0 || !got_clen) && (n = fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
400 fwrite(buf, 1, n, output);
401 #ifdef BB_FEATURE_WGET_STATUSBAR
403 if (quiet_flag==FALSE)
411 fgets(buf, sizeof(buf), dfp); /* This is a newline */
412 fgets(buf, sizeof(buf), dfp);
413 filesize = strtol(buf, (char **) NULL, 16);
414 if (filesize==0) chunked = 0; /* all done! */
417 if (n == 0 && ferror(dfp))
418 perror_msg_and_die("network read error");
421 if (!proxy && target.is_ftp) {
423 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
424 error_msg_and_die("ftp error: %s", buf+4);
425 ftpcmd("QUIT", NULL, sfp, buf);
427 #ifdef BB_FEATURE_WGET_STATUSBAR
428 if (quiet_flag==FALSE)
435 void parse_url(char *url, struct host_info *h)
439 if (strncmp(url, "http://", 7) == 0) {
443 } else if (strncmp(url, "ftp://", 6) == 0) {
448 error_msg_and_die("not an http or ftp url: %s", url);
450 sp = strchr(h->host, '/');
457 up = strrchr(h->host, '@');
465 cp = strchr(h->host, ':');
474 FILE *open_socket(char *host, int port)
476 struct sockaddr_in s_in;
481 memset(&s_in, 0, sizeof(s_in));
482 s_in.sin_family = AF_INET;
483 if ((hp = (struct hostent *) gethostbyname(host)) == NULL)
484 error_msg_and_die("cannot resolve %s", host);
485 memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
486 s_in.sin_port = htons(port);
489 * Get the server onto a stdio stream.
491 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
492 perror_msg_and_die("socket()");
493 if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
494 perror_msg_and_die("connect(%s)", host);
495 if ((fp = fdopen(fd, "r+")) == NULL)
496 perror_msg_and_die("fdopen()");
502 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
509 /* retrieve header line */
510 if (fgets(buf, bufsiz, fp) == NULL)
513 /* see if we are at the end of the headers */
514 for (s = buf ; *s == '\r' ; ++s)
519 /* convert the header name to lower case */
520 for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
523 /* verify we are at the end of the header name */
525 error_msg_and_die("bad header line: %s", buf);
527 /* locate the start of the header value */
528 for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
532 /* locate the end of header */
533 while (*s != '\0' && *s != '\r' && *s != '\n')
536 /* end of header found */
542 /* Rats! The buffer isn't big enough to hold the entire header value. */
543 while (c = getc(fp), c != EOF && c != '\n')
549 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
555 fprintf(fp, "%s%s\n", s1, s2);
560 p = fgets(buf, 510, fp);
562 perror_msg_and_die("fgets()");
563 } while (! isdigit(buf[0]) || buf[3] != ' ');
568 #ifdef BB_FEATURE_WGET_STATUSBAR
569 /* Stuff below is from BSD rcp util.c, as added to openshh.
570 * Original copyright notice is retained at the end of this file.
578 struct winsize winsize;
580 if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
581 return (winsize.ws_col ? winsize.ws_col : 80);
587 updateprogressmeter(int ignore)
589 int save_errno = errno;
598 struct itimerval itv;
600 itv.it_value.tv_sec = wait;
601 itv.it_value.tv_usec = 0;
602 itv.it_interval = itv.it_value;
603 setitimer(ITIMER_REAL, &itv, NULL);
608 progressmeter(int flag)
610 static const char prefixes[] = " KMGTP";
611 static struct timeval lastupdate;
612 static off_t lastsize;
613 struct timeval now, td, wait;
614 off_t cursize, abbrevsize;
616 int ratio, barlength, i, remaining;
620 (void) gettimeofday(&start, (struct timezone *) 0);
625 (void) gettimeofday(&now, (struct timezone *) 0);
627 if (filesize != 0 && !chunked) {
628 ratio = 100.0 * cursize / filesize;
629 ratio = MAX(ratio, 0);
630 ratio = MIN(ratio, 100);
634 snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
636 barlength = getttywidth() - 51;
638 i = barlength * ratio / 100;
639 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
641 "*****************************************************************************"
642 "*****************************************************************************",
646 abbrevsize = cursize;
647 while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
651 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
652 (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
655 timersub(&now, &lastupdate, &wait);
656 if (cursize > lastsize) {
659 if (wait.tv_sec >= STALLTIME) {
660 start.tv_sec += wait.tv_sec;
661 start.tv_usec += wait.tv_usec;
665 timersub(&now, &start, &td);
666 elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
668 if (statbytes <= 0 || elapsed <= 0.0 || cursize > filesize) {
669 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
671 } else if (wait.tv_sec >= STALLTIME) {
672 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
675 remaining = (int) (filesize / (statbytes / elapsed) - elapsed);
676 i = remaining / 3600;
678 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
681 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
683 i = remaining % 3600;
684 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
685 "%02d:%02d ETA", i / 60, i % 60);
687 write(fileno(stderr), buf, strlen(buf));
691 sa.sa_handler = updateprogressmeter;
692 sigemptyset(&sa.sa_mask);
693 sa.sa_flags = SA_RESTART;
694 sigaction(SIGALRM, &sa, NULL);
696 } else if (flag == 1) {
703 /* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff,
704 * much of which was blatently stolen from openssh. */
707 * Copyright (c) 1992, 1993
708 * The Regents of the University of California. All rights reserved.
710 * Redistribution and use in source and binary forms, with or without
711 * modification, are permitted provided that the following conditions
713 * 1. Redistributions of source code must retain the above copyright
714 * notice, this list of conditions and the following disclaimer.
715 * 2. Redistributions in binary form must reproduce the above copyright
716 * notice, this list of conditions and the following disclaimer in the
717 * documentation and/or other materials provided with the distribution.
719 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
720 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
722 * 4. Neither the name of the University nor the names of its contributors
723 * may be used to endorse or promote products derived from this software
724 * without specific prior written permission.
726 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
727 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
728 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
729 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
730 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
731 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
732 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
733 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
734 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
735 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
738 * $Id: wget.c,v 1.35 2001/04/11 20:11:51 kraai Exp $
745 c-file-style: "linux"