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>
42 static void parse_url(char *url, struct host_info *h);
43 static FILE *open_socket(char *host, int port);
44 static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
45 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
47 /* Globals (can be accessed from signal handlers */
48 static off_t filesize = 0; /* content-length of the file */
49 static int chunked = 0; /* chunked transfer encoding */
50 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
51 static void progressmeter(int flag);
52 static char *curfile; /* Name of current file being transferred. */
53 static struct timeval start; /* Time a transfer started. */
54 static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */
55 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
56 static const int STALLTIME = 5;
59 static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
61 if (output != stdout && do_continue==0) {
67 /* Read NMEMB elements of SIZE bytes into PTR from STREAM. Returns the
68 * number of elements read, and a short count if an eof or non-interrupt
69 * error is encountered. */
70 static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
76 ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream);
77 } while (ret < nmemb && ferror(stream) && errno == EINTR);
82 /* Write NMEMB elements of SIZE bytes from PTR to STREAM. Returns the
83 * number of elements written, and a short count if an eof or non-interrupt
84 * error is encountered. */
85 static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream)
91 ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream);
92 } while (ret < nmemb && ferror(stream) && errno == EINTR);
97 /* Read a line or SIZE - 1 bytes into S, whichever is less, from STREAM.
98 * Returns S, or NULL if an eof or non-interrupt error is encountered. */
99 static char *safe_fgets(char *s, int size, FILE *stream)
105 ret = fgets(s, size, stream);
106 } while (ret == NULL && ferror(stream) && errno == EINTR);
111 #define close_delete_and_die(s...) { \
112 close_and_delete_outfile(output, fname_out, do_continue); \
113 bb_error_msg_and_die(s); }
116 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
118 * Base64-encode character string
119 * oops... isn't something similar in uuencode.c?
120 * It would be better to use already existing code
122 char *base64enc(char *p, char *buf, int len) {
124 char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
130 bb_error_msg_and_die("buffer overflow");
131 *(s++) = al[(*p >> 2) & 0x3F];
132 *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
136 *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
138 *(s++) = al[*(p++) & 0x3F];
145 int wget_main(int argc, char **argv)
147 int n, try=5, status;
150 char *dir_prefix=NULL;
153 char extra_headers[1024];
154 char *extra_headers_ptr = extra_headers;
155 int extra_headers_left = sizeof(extra_headers);
156 int which_long_opt = 0, option_index = -1;
157 struct host_info server, target;
159 FILE *sfp = NULL; /* socket to web/ftp server */
160 FILE *dfp = NULL; /* socket to ftp server (data) */
161 char *fname_out = NULL; /* where to direct output (-O) */
162 int do_continue = 0; /* continue a prev transfer (-c) */
163 long beg_range = 0L; /* range at which continue begins */
164 int got_clen = 0; /* got content-length: from server */
165 FILE *output; /* socket to web server */
166 int quiet_flag = FALSE; /* Be verry, verry quiet... */
167 int noproxy = 0; /* Use proxies if env vars are set */
169 #define LONG_HEADER 1
170 #define LONG_PASSIVE 2
172 struct option long_options[] = {
173 { "continue", 0, NULL, 'c' },
174 { "quiet", 0, NULL, 'q' },
175 { "output-document", 1, NULL, 'O' },
176 { "header", 1, &which_long_opt, LONG_HEADER },
177 { "proxy", 1, NULL, 'Y' },
178 { "passive-ftp", 0, &which_long_opt, LONG_PASSIVE },
182 * Crack command line.
184 while ((n = getopt_long(argc, argv, "cqO:P:Y:", long_options, &option_index)) != EOF) {
196 /* can't set fname_out to NULL if outputting to stdout, because
197 * this gets interpreted as the auto-gen output filename
198 * case below - tausq@debian.org
203 if (strcmp(optarg, "off") == 0)
207 switch (which_long_opt) {
209 int arglen = strlen(optarg);
210 if(extra_headers_left - arglen - 2 <= 0)
211 bb_error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
212 strcpy(extra_headers_ptr, optarg);
213 extra_headers_ptr += arglen;
214 extra_headers_left -= ( arglen + 2 );
215 *extra_headers_ptr++ = '\r';
216 *extra_headers_ptr++ = '\n';
217 *(extra_headers_ptr + 1) = 0;
221 // ignore -- we always use passive mode
230 if (argc - optind != 1)
233 parse_url(argv[optind], &target);
234 server.host = target.host;
235 server.port = target.port;
238 * Use the proxy if necessary.
241 proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
243 parse_url(bb_xstrdup(proxy), &server);
246 /* Guess an output filename */
249 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
252 bb_get_last_path_component(target.path);
253 if (fname_out==NULL || strlen(fname_out)<1) {
255 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
260 if (dir_prefix != NULL)
261 fname_out = concat_path_file(dir_prefix, fname_out);
262 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
264 curfile = bb_get_last_path_component(fname_out);
267 if (do_continue && !fname_out)
268 bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
272 * Open the output file stream.
274 if (strcmp(fname_out, "-") == 0) {
278 output = bb_xfopen(fname_out, (do_continue ? "a" : "w"));
282 * Determine where to start transfer.
285 if (fstat(fileno(output), &sbuf) < 0)
286 bb_perror_msg_and_die("fstat()");
287 if (sbuf.st_size > 0)
288 beg_range = sbuf.st_size;
293 if (proxy || !target.is_ftp) {
298 got_clen = chunked = 0;
301 close_delete_and_die("too many redirections");
304 * Open socket to http server
306 if (sfp) fclose(sfp);
307 sfp = open_socket(server.host, server.port);
313 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
314 target.is_ftp ? "f" : "ht", target.host,
315 target.port, target.path);
317 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
320 fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
322 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
324 fprintf(sfp, "Authorization: Basic %s\r\n",
325 base64enc(target.user, buf, sizeof(buf)));
327 if (proxy && server.user) {
328 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
329 base64enc(server.user, buf, sizeof(buf)));
334 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
335 if(extra_headers_left < sizeof(extra_headers))
336 fputs(extra_headers,sfp);
337 fprintf(sfp,"Connection: close\r\n\r\n");
340 * Retrieve HTTP response line and check for "200" status code.
343 if (fgets(buf, sizeof(buf), sfp) == NULL)
344 close_delete_and_die("no response from server");
346 for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
348 for ( ; isspace(*s) ; ++s)
350 switch (status = atoi(s)) {
353 while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
356 if (do_continue && output != stdout)
357 output = freopen(fname_out, "w", output);
360 case 300: /* redirection */
371 close_delete_and_die("server returned error %d: %s", atoi(s), buf);
375 * Retrieve HTTP headers.
377 while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
378 if (strcasecmp(buf, "content-length") == 0) {
383 if (strcasecmp(buf, "transfer-encoding") == 0) {
384 if (strcasecmp(s, "chunked") == 0) {
385 chunked = got_clen = 1;
387 close_delete_and_die("server wants to do %s transfer encoding", s);
390 if (strcasecmp(buf, "location") == 0) {
392 target.path = bb_xstrdup(s+1);
394 parse_url(bb_xstrdup(s), &target);
396 server.host = target.host;
397 server.port = target.port;
402 } while(status >= 300);
412 target.user = bb_xstrdup("anonymous:busybox@");
414 sfp = open_socket(server.host, server.port);
415 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
416 close_delete_and_die("%s", buf+4);
419 * Splitting username:password pair,
422 s = strchr(target.user, ':');
425 switch(ftpcmd("USER ", target.user, sfp, buf)) {
429 if (ftpcmd("PASS ", s, sfp, buf) == 230)
431 /* FALLTHRU (failed login) */
433 close_delete_and_die("ftp login: %s", buf+4);
436 ftpcmd("CDUP", NULL, sfp, buf);
437 ftpcmd("TYPE I", NULL, sfp, buf);
442 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
443 filesize = atol(buf+4);
448 * Entering passive mode
450 if (ftpcmd("PASV", NULL, sfp, buf) != 227)
451 close_delete_and_die("PASV: %s", buf+4);
452 s = strrchr(buf, ',');
455 s = strrchr(buf, ',');
456 port += atoi(s+1) * 256;
457 dfp = open_socket(server.host, port);
460 sprintf(buf, "REST %ld", beg_range);
461 if (ftpcmd(buf, NULL, sfp, buf) != 350) {
462 if (output != stdout)
463 output = freopen(fname_out, "w", output);
466 filesize -= beg_range;
469 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
470 close_delete_and_die("RETR: %s", buf+4);
479 fgets(buf, sizeof(buf), dfp);
480 filesize = strtol(buf, (char **) NULL, 16);
482 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
483 if (quiet_flag==FALSE)
487 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, ((chunked || got_clen) && (filesize < sizeof(buf)) ? filesize : sizeof(buf)), dfp)) > 0) {
488 if (safe_fwrite(buf, 1, n, output) != n) {
489 bb_perror_msg_and_die("write error");
491 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
500 safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
501 safe_fgets(buf, sizeof(buf), dfp);
502 filesize = strtol(buf, (char **) NULL, 16);
504 chunked = 0; /* all done! */
508 if (n == 0 && ferror(dfp)) {
509 bb_perror_msg_and_die("network read error");
512 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
513 if (quiet_flag==FALSE)
516 if (!proxy && target.is_ftp) {
518 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
519 bb_error_msg_and_die("ftp error: %s", buf+4);
520 ftpcmd("QUIT", NULL, sfp, buf);
526 void parse_url(char *url, struct host_info *h)
530 if (strncmp(url, "http://", 7) == 0) {
534 } else if (strncmp(url, "ftp://", 6) == 0) {
539 bb_error_msg_and_die("not an http or ftp url: %s", url);
541 sp = strchr(h->host, '/');
546 h->path = bb_xstrdup("");
548 up = strrchr(h->host, '@');
556 cp = strchr(h->host, ':');
565 FILE *open_socket(char *host, int port)
571 snprintf(port_str, sizeof(port_str), "%d", port);
572 fd=xconnect(host, port_str);
575 * Get the server onto a stdio stream.
577 if ((fp = fdopen(fd, "r+")) == NULL)
578 bb_perror_msg_and_die("fdopen()");
584 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
591 /* retrieve header line */
592 if (fgets(buf, bufsiz, fp) == NULL)
595 /* see if we are at the end of the headers */
596 for (s = buf ; *s == '\r' ; ++s)
601 /* convert the header name to lower case */
602 for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
605 /* verify we are at the end of the header name */
607 bb_error_msg_and_die("bad header line: %s", buf);
609 /* locate the start of the header value */
610 for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
614 /* locate the end of header */
615 while (*s != '\0' && *s != '\r' && *s != '\n')
618 /* end of header found */
624 /* Rats! The buffer isn't big enough to hold the entire header value. */
625 while (c = getc(fp), c != EOF && c != '\n')
631 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
637 fprintf(fp, "%s%s\r\n", s1, s2);
642 p = fgets(buf, 510, fp);
644 bb_perror_msg_and_die("fgets()");
645 } while (! isdigit(buf[0]) || buf[3] != ' ');
650 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
651 /* Stuff below is from BSD rcp util.c, as added to openshh.
652 * Original copyright notice is retained at the end of this file.
660 struct winsize winsize;
662 if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
663 return (winsize.ws_col ? winsize.ws_col : 80);
669 updateprogressmeter(int ignore)
671 int save_errno = errno;
680 struct itimerval itv;
682 itv.it_value.tv_sec = wait;
683 itv.it_value.tv_usec = 0;
684 itv.it_interval = itv.it_value;
685 setitimer(ITIMER_REAL, &itv, NULL);
690 progressmeter(int flag)
692 static const char prefixes[] = " KMGTP";
693 static struct timeval lastupdate;
694 static off_t lastsize, totalsize;
695 struct timeval now, td, wait;
696 off_t cursize, abbrevsize;
698 int ratio, barlength, i, remaining;
702 (void) gettimeofday(&start, (struct timezone *) 0);
705 totalsize = filesize; /* as filesize changes.. */
708 (void) gettimeofday(&now, (struct timezone *) 0);
710 if (totalsize != 0 && !chunked) {
711 ratio = 100.0 * cursize / totalsize;
712 ratio = MAX(ratio, 0);
713 ratio = MIN(ratio, 100);
717 snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
719 barlength = getttywidth() - 51;
721 i = barlength * ratio / 100;
722 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
724 "*****************************************************************************"
725 "*****************************************************************************",
729 abbrevsize = cursize;
730 while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
734 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
735 (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
738 timersub(&now, &lastupdate, &wait);
739 if (cursize > lastsize) {
742 if (wait.tv_sec >= STALLTIME) {
743 start.tv_sec += wait.tv_sec;
744 start.tv_usec += wait.tv_usec;
748 timersub(&now, &start, &td);
749 elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
751 if (wait.tv_sec >= STALLTIME) {
752 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
754 } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
755 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
758 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
759 i = remaining / 3600;
761 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
764 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
766 i = remaining % 3600;
767 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
768 "%02d:%02d ETA", i / 60, i % 60);
770 write(fileno(stderr), buf, strlen(buf));
774 sa.sa_handler = updateprogressmeter;
775 sigemptyset(&sa.sa_mask);
776 sa.sa_flags = SA_RESTART;
777 sigaction(SIGALRM, &sa, NULL);
779 } else if (flag == 1) {
787 /* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
788 * much of which was blatently stolen from openssh. */
791 * Copyright (c) 1992, 1993
792 * The Regents of the University of California. All rights reserved.
794 * Redistribution and use in source and binary forms, with or without
795 * modification, are permitted provided that the following conditions
797 * 1. Redistributions of source code must retain the above copyright
798 * notice, this list of conditions and the following disclaimer.
799 * 2. Redistributions in binary form must reproduce the above copyright
800 * notice, this list of conditions and the following disclaimer in the
801 * documentation and/or other materials provided with the distribution.
803 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
804 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
806 * 4. Neither the name of the University nor the names of its contributors
807 * may be used to endorse or promote products derived from this software
808 * without specific prior written permission.
810 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
811 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
812 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
813 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
814 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
815 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
816 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
817 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
818 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
819 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
822 * $Id: wget.c,v 1.57 2003/08/29 06:25:04 bug1 Exp $
829 c-file-style: "linux"