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) {
299 close_delete_and_die("too many redirections");
302 * Open socket to http server
304 if (sfp) fclose(sfp);
305 sfp = open_socket(server.host, server.port);
311 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
312 target.is_ftp ? "f" : "ht", target.host,
313 target.port, target.path);
315 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
318 fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
320 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
322 fprintf(sfp, "Authorization: Basic %s\r\n",
323 base64enc(target.user, buf, sizeof(buf)));
325 if (proxy && server.user) {
326 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
327 base64enc(server.user, buf, sizeof(buf)));
332 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
333 if(extra_headers_left < sizeof(extra_headers))
334 fputs(extra_headers,sfp);
335 fprintf(sfp,"Connection: close\r\n\r\n");
338 * Retrieve HTTP response line and check for "200" status code.
340 read_response: if (fgets(buf, sizeof(buf), sfp) == NULL)
341 close_delete_and_die("no response from server");
343 for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
345 for ( ; isspace(*s) ; ++s)
347 switch (status = atoi(s)) {
350 while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
353 if (do_continue && output != stdout)
354 output = freopen(fname_out, "w", output);
357 case 300: /* redirection */
368 close_delete_and_die("server returned error %d: %s", atoi(s), buf);
372 * Retrieve HTTP headers.
374 while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
375 if (strcasecmp(buf, "content-length") == 0) {
380 if (strcasecmp(buf, "transfer-encoding") == 0) {
381 if (strcasecmp(s, "chunked") == 0) {
382 chunked = got_clen = 1;
384 close_delete_and_die("server wants to do %s transfer encoding", s);
387 if (strcasecmp(buf, "location") == 0) {
389 target.path = bb_xstrdup(s+1);
391 parse_url(bb_xstrdup(s), &target);
393 server.host = target.host;
394 server.port = target.port;
399 } while(status >= 300);
409 target.user = bb_xstrdup("anonymous:busybox@");
411 sfp = open_socket(server.host, server.port);
412 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
413 close_delete_and_die("%s", buf+4);
416 * Splitting username:password pair,
419 s = strchr(target.user, ':');
422 switch(ftpcmd("USER ", target.user, sfp, buf)) {
426 if (ftpcmd("PASS ", s, sfp, buf) == 230)
428 /* FALLTHRU (failed login) */
430 close_delete_and_die("ftp login: %s", buf+4);
433 ftpcmd("CDUP", NULL, sfp, buf);
434 ftpcmd("TYPE I", NULL, sfp, buf);
439 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
440 filesize = atol(buf+4);
445 * Entering passive mode
447 if (ftpcmd("PASV", NULL, sfp, buf) != 227)
448 close_delete_and_die("PASV: %s", buf+4);
449 s = strrchr(buf, ',');
452 s = strrchr(buf, ',');
453 port += atoi(s+1) * 256;
454 dfp = open_socket(server.host, port);
457 sprintf(buf, "REST %ld", beg_range);
458 if (ftpcmd(buf, NULL, sfp, buf) != 350) {
459 if (output != stdout)
460 output = freopen(fname_out, "w", output);
463 filesize -= beg_range;
466 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
467 close_delete_and_die("RETR: %s", buf+4);
476 fgets(buf, sizeof(buf), dfp);
477 filesize = strtol(buf, (char **) NULL, 16);
479 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
480 if (quiet_flag==FALSE)
484 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
485 if (safe_fwrite(buf, 1, n, output) != n)
486 bb_perror_msg_and_die("write error");
487 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
495 safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
496 safe_fgets(buf, sizeof(buf), dfp);
497 filesize = strtol(buf, (char **) NULL, 16);
498 if (filesize==0) chunked = 0; /* all done! */
501 if (n == 0 && ferror(dfp))
502 bb_perror_msg_and_die("network read error");
504 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
505 if (quiet_flag==FALSE)
508 if (!proxy && target.is_ftp) {
510 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
511 bb_error_msg_and_die("ftp error: %s", buf+4);
512 ftpcmd("QUIT", NULL, sfp, buf);
518 void parse_url(char *url, struct host_info *h)
522 if (strncmp(url, "http://", 7) == 0) {
526 } else if (strncmp(url, "ftp://", 6) == 0) {
531 bb_error_msg_and_die("not an http or ftp url: %s", url);
533 sp = strchr(h->host, '/');
538 h->path = bb_xstrdup("");
540 up = strrchr(h->host, '@');
548 cp = strchr(h->host, ':');
557 FILE *open_socket(char *host, int port)
563 snprintf(port_str, sizeof(port_str), "%d", port);
564 fd=xconnect(host, port_str);
567 * Get the server onto a stdio stream.
569 if ((fp = fdopen(fd, "r+")) == NULL)
570 bb_perror_msg_and_die("fdopen()");
576 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
583 /* retrieve header line */
584 if (fgets(buf, bufsiz, fp) == NULL)
587 /* see if we are at the end of the headers */
588 for (s = buf ; *s == '\r' ; ++s)
593 /* convert the header name to lower case */
594 for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
597 /* verify we are at the end of the header name */
599 bb_error_msg_and_die("bad header line: %s", buf);
601 /* locate the start of the header value */
602 for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
606 /* locate the end of header */
607 while (*s != '\0' && *s != '\r' && *s != '\n')
610 /* end of header found */
616 /* Rats! The buffer isn't big enough to hold the entire header value. */
617 while (c = getc(fp), c != EOF && c != '\n')
623 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
629 fprintf(fp, "%s%s\r\n", s1, s2);
634 p = fgets(buf, 510, fp);
636 bb_perror_msg_and_die("fgets()");
637 } while (! isdigit(buf[0]) || buf[3] != ' ');
642 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
643 /* Stuff below is from BSD rcp util.c, as added to openshh.
644 * Original copyright notice is retained at the end of this file.
652 struct winsize winsize;
654 if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
655 return (winsize.ws_col ? winsize.ws_col : 80);
661 updateprogressmeter(int ignore)
663 int save_errno = errno;
672 struct itimerval itv;
674 itv.it_value.tv_sec = wait;
675 itv.it_value.tv_usec = 0;
676 itv.it_interval = itv.it_value;
677 setitimer(ITIMER_REAL, &itv, NULL);
682 progressmeter(int flag)
684 static const char prefixes[] = " KMGTP";
685 static struct timeval lastupdate;
686 static off_t lastsize, totalsize;
687 struct timeval now, td, wait;
688 off_t cursize, abbrevsize;
690 int ratio, barlength, i, remaining;
694 (void) gettimeofday(&start, (struct timezone *) 0);
697 totalsize = filesize; /* as filesize changes.. */
700 (void) gettimeofday(&now, (struct timezone *) 0);
702 if (totalsize != 0 && !chunked) {
703 ratio = 100.0 * cursize / totalsize;
704 ratio = MAX(ratio, 0);
705 ratio = MIN(ratio, 100);
709 snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
711 barlength = getttywidth() - 51;
713 i = barlength * ratio / 100;
714 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
716 "*****************************************************************************"
717 "*****************************************************************************",
721 abbrevsize = cursize;
722 while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
726 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
727 (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
730 timersub(&now, &lastupdate, &wait);
731 if (cursize > lastsize) {
734 if (wait.tv_sec >= STALLTIME) {
735 start.tv_sec += wait.tv_sec;
736 start.tv_usec += wait.tv_usec;
740 timersub(&now, &start, &td);
741 elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
743 if (wait.tv_sec >= STALLTIME) {
744 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
746 } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
747 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
750 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
751 i = remaining / 3600;
753 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
756 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
758 i = remaining % 3600;
759 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
760 "%02d:%02d ETA", i / 60, i % 60);
762 write(fileno(stderr), buf, strlen(buf));
766 sa.sa_handler = updateprogressmeter;
767 sigemptyset(&sa.sa_mask);
768 sa.sa_flags = SA_RESTART;
769 sigaction(SIGALRM, &sa, NULL);
771 } else if (flag == 1) {
779 /* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
780 * much of which was blatently stolen from openssh. */
783 * Copyright (c) 1992, 1993
784 * The Regents of the University of California. All rights reserved.
786 * Redistribution and use in source and binary forms, with or without
787 * modification, are permitted provided that the following conditions
789 * 1. Redistributions of source code must retain the above copyright
790 * notice, this list of conditions and the following disclaimer.
791 * 2. Redistributions in binary form must reproduce the above copyright
792 * notice, this list of conditions and the following disclaimer in the
793 * documentation and/or other materials provided with the distribution.
795 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
796 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
798 * 4. Neither the name of the University nor the names of its contributors
799 * may be used to endorse or promote products derived from this software
800 * without specific prior written permission.
802 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
803 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
804 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
805 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
806 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
807 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
808 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
809 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
810 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
811 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
814 * $Id: wget.c,v 1.54 2003/07/22 08:56:51 andersen Exp $
821 c-file-style: "linux"