1 /* vi: set sw=4 ts=4: */
3 * wget - retrieve a file using HTTP or FTP
5 * Chip Rosenthal Covad Communications <chip@laserlink.net>
6 * Licensed under GPLv2, see file LICENSE in this source tree.
8 * Copyright (C) 2010 Bradley M. Kuhn <bkuhn@ebb.org>
9 * Kuhn's copyrights are licensed GPLv2-or-later. File as a whole remains GPLv2.
12 //usage:#define wget_trivial_usage
13 //usage: IF_FEATURE_WGET_LONG_OPTIONS(
14 //usage: "[-c|--continue] [-s|--spider] [-q|--quiet] [-O|--output-document FILE]\n"
15 //usage: " [--header 'header: value'] [-Y|--proxy on/off] [-P DIR]\n"
16 /* Since we ignore these opts, we don't show them in --help */
17 /* //usage: " [--no-check-certificate] [--no-cache]" */
18 //usage: " [-U|--user-agent AGENT]" IF_FEATURE_WGET_TIMEOUT(" [-T SEC]") " URL..."
20 //usage: IF_NOT_FEATURE_WGET_LONG_OPTIONS(
21 //usage: "[-csq] [-O FILE] [-Y on/off] [-P DIR] [-U AGENT]"
22 //usage: IF_FEATURE_WGET_TIMEOUT(" [-T SEC]") " URL..."
24 //usage:#define wget_full_usage "\n\n"
25 //usage: "Retrieve files via HTTP or FTP\n"
26 //usage: "\n -s Spider mode - only check file existence"
27 //usage: "\n -c Continue retrieval of aborted transfer"
28 //usage: "\n -q Quiet"
29 //usage: "\n -P DIR Save to DIR (default .)"
30 //usage: IF_FEATURE_WGET_TIMEOUT(
31 //usage: "\n -T SEC Network read timeout is SEC seconds"
33 //usage: "\n -O FILE Save to FILE ('-' for stdout)"
34 //usage: "\n -U STR Use STR for User-Agent header"
35 //usage: "\n -Y Use proxy ('on' or 'off')"
40 # define log_io(...) bb_error_msg(__VA_ARGS__)
42 # define log_io(...) ((void)0)
58 off_t content_len; /* Content-length of the file */
59 off_t beg_range; /* Range at which continue begins */
60 #if ENABLE_FEATURE_WGET_STATUSBAR
61 off_t transferred; /* Number of bytes transferred so far */
62 const char *curfile; /* Name of current file being transferred */
66 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
70 char *fname_out; /* where to direct output (-O) */
71 const char *proxy_flag; /* Use proxies if env vars are set */
72 const char *user_agent; /* "User-Agent" header field */
73 #if ENABLE_FEATURE_WGET_TIMEOUT
74 unsigned timeout_seconds;
78 smallint chunked; /* chunked transfer encoding */
79 smallint got_clen; /* got content-length: from server */
80 /* Local downloads do benefit from big buffer.
81 * With 512 byte buffer, it was measured to be
82 * an order of magnitude slower than with big one.
84 uint64_t just_to_align_next_member;
85 char wget_buf[CONFIG_FEATURE_COPYBUF_KB*1024];
87 #define G (*ptr_to_globals)
88 #define INIT_G() do { \
89 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
90 IF_FEATURE_WGET_TIMEOUT(G.timeout_seconds = 900;) \
94 /* Must match option string! */
96 WGET_OPT_CONTINUE = (1 << 0),
97 WGET_OPT_SPIDER = (1 << 1),
98 WGET_OPT_QUIET = (1 << 2),
99 WGET_OPT_OUTNAME = (1 << 3),
100 WGET_OPT_PREFIX = (1 << 4),
101 WGET_OPT_PROXY = (1 << 5),
102 WGET_OPT_USER_AGENT = (1 << 6),
103 WGET_OPT_NETWORK_READ_TIMEOUT = (1 << 7),
104 WGET_OPT_RETRIES = (1 << 8),
105 WGET_OPT_PASSIVE = (1 << 9),
106 WGET_OPT_HEADER = (1 << 10) * ENABLE_FEATURE_WGET_LONG_OPTIONS,
107 WGET_OPT_POST_DATA = (1 << 11) * ENABLE_FEATURE_WGET_LONG_OPTIONS,
115 #if ENABLE_FEATURE_WGET_STATUSBAR
116 static void progress_meter(int flag)
118 if (option_mask32 & WGET_OPT_QUIET)
121 if (flag == PROGRESS_START)
122 bb_progress_init(&G.pmt, G.curfile);
124 bb_progress_update(&G.pmt,
127 (G.chunked || !G.got_clen) ? 0 : G.beg_range + G.transferred + G.content_len
130 if (flag == PROGRESS_END) {
131 bb_progress_free(&G.pmt);
132 bb_putchar_stderr('\n');
137 static ALWAYS_INLINE void progress_meter(int flag UNUSED_PARAM) { }
141 /* IPv6 knows scoped address types i.e. link and site local addresses. Link
142 * local addresses can have a scope identifier to specify the
143 * interface/link an address is valid on (e.g. fe80::1%eth0). This scope
144 * identifier is only valid on a single node.
146 * RFC 4007 says that the scope identifier MUST NOT be sent across the wire,
147 * unless all nodes agree on the semantic. Apache e.g. regards zone identifiers
148 * in the Host header as invalid requests, see
149 * https://issues.apache.org/bugzilla/show_bug.cgi?id=35122
151 static void strip_ipv6_scope_id(char *host)
155 /* bbox wget actually handles IPv6 addresses without [], like
156 * wget "http://::1/xxx", but this is not standard.
157 * To save code, _here_ we do not support it. */
160 return; /* not IPv6 */
162 scope = strchr(host, '%');
166 /* Remove the IPv6 zone identifier from the host address */
167 cp = strchr(host, ']');
168 if (!cp || (cp[1] != ':' && cp[1] != '\0')) {
169 /* malformed address (not "[xx]:nn" or "[xx]") */
173 /* cp points to "]...", scope points to "%eth0]..." */
174 overlapping_strcpy(scope, cp);
177 #if ENABLE_FEATURE_WGET_AUTHENTICATION
178 /* Base64-encode character string. */
179 static char *base64enc(const char *str)
181 unsigned len = strlen(str);
182 if (len > sizeof(G.wget_buf)/4*3 - 10) /* paranoia */
183 len = sizeof(G.wget_buf)/4*3 - 10;
184 bb_uuencode(G.wget_buf, str, len, bb_uuenc_tbl_base64);
189 static char* sanitize_string(char *s)
191 unsigned char *p = (void *) s;
198 static FILE *open_socket(len_and_sockaddr *lsa)
202 /* glibc 2.4 seems to try seeking on it - ??! */
203 /* hopefully it understands what ESPIPE means... */
204 fp = fdopen(xconnect_stream(lsa), "r+");
206 bb_perror_msg_and_die(bb_msg_memory_exhausted);
211 /* Returns '\n' if it was seen, else '\0'. Trims at first '\r' or '\n' */
212 static char fgets_and_trim(FILE *fp)
217 if (fgets(G.wget_buf, sizeof(G.wget_buf) - 1, fp) == NULL)
218 bb_perror_msg_and_die("error getting response");
220 buf_ptr = strchrnul(G.wget_buf, '\n');
223 buf_ptr = strchrnul(G.wget_buf, '\r');
226 log_io("< %s", G.wget_buf);
231 static int ftpcmd(const char *s1, const char *s2, FILE *fp)
237 fprintf(fp, "%s%s\r\n", s1, s2);
239 log_io("> %s%s", s1, s2);
244 } while (!isdigit(G.wget_buf[0]) || G.wget_buf[3] != ' ');
246 G.wget_buf[3] = '\0';
247 result = xatoi_positive(G.wget_buf);
252 static void parse_url(const char *src_url, struct host_info *h)
257 h->allocated = url = xstrdup(src_url);
259 if (strncmp(url, "http://", 7) == 0) {
260 h->port = bb_lookup_port("http", "tcp", 80);
263 } else if (strncmp(url, "ftp://", 6) == 0) {
264 h->port = bb_lookup_port("ftp", "tcp", 21);
268 bb_error_msg_and_die("not an http or ftp url: %s", sanitize_string(url));
271 // "Real" wget 'http://busybox.net?var=a/b' sends this request:
272 // 'GET /?var=a/b HTTP 1.0'
273 // and saves 'index.html?var=a%2Fb' (we save 'b')
274 // wget 'http://busybox.net?login=john@doe':
275 // request: 'GET /?login=john@doe HTTP/1.0'
276 // saves: 'index.html?login=john@doe' (we save '?login=john@doe')
277 // wget 'http://busybox.net#test/test':
278 // request: 'GET / HTTP/1.0'
279 // saves: 'index.html' (we save 'test')
281 // We also don't add unique .N suffix if file exists...
282 sp = strchr(h->host, '/');
283 p = strchr(h->host, '?'); if (!sp || (p && sp > p)) sp = p;
284 p = strchr(h->host, '#'); if (!sp || (p && sp > p)) sp = p;
287 } else if (*sp == '/') {
290 } else { // '#' or '?'
291 // http://busybox.net?login=john@doe is a valid URL
292 // memmove converts to:
293 // http:/busybox.nett?login=john@doe...
294 memmove(h->host - 1, h->host, sp - h->host);
300 // We used to set h->user to NULL here, but this interferes
301 // with handling of code 302 ("object was moved")
303 sp = strrchr(h->host, '@');
305 // URL-decode "user:password" string before base64-encoding:
306 // wget http://test:my%20pass@example.com should send
307 // Authorization: Basic dGVzdDpteSBwYXNz
308 // which decodes to "test:my pass".
309 // Standard wget and curl do this too.
311 h->user = percent_decode_in_place(h->host, /*strict:*/ 0);
318 static char *gethdr(FILE *fp)
323 /* retrieve header line */
324 c = fgets_and_trim(fp);
326 /* end of the headers? */
327 if (G.wget_buf[0] == '\0')
330 /* convert the header name to lower case */
331 for (s = G.wget_buf; isalnum(*s) || *s == '-' || *s == '.'; ++s) {
332 /* tolower for "A-Z", no-op for "0-9a-z-." */
336 /* verify we are at the end of the header name */
338 bb_error_msg_and_die("bad header line: %s", sanitize_string(G.wget_buf));
340 /* locate the start of the header value */
342 hdrval = skip_whitespace(s);
345 /* Rats! The buffer isn't big enough to hold the entire header value */
346 while (c = getc(fp), c != EOF && c != '\n')
353 static void reset_beg_range_to_zero(void)
355 bb_error_msg("restart failed");
357 xlseek(G.output_fd, 0, SEEK_SET);
358 /* Done at the end instead: */
359 /* ftruncate(G.output_fd, 0); */
362 static FILE* prepare_ftp_session(FILE **dfpp, struct host_info *target, len_and_sockaddr *lsa)
369 target->user = xstrdup("anonymous:busybox@");
371 sfp = open_socket(lsa);
372 if (ftpcmd(NULL, NULL, sfp) != 220)
373 bb_error_msg_and_die("%s", sanitize_string(G.wget_buf + 4));
376 * Splitting username:password pair,
379 str = strchr(target->user, ':');
382 switch (ftpcmd("USER ", target->user, sfp)) {
386 if (ftpcmd("PASS ", str, sfp) == 230)
388 /* fall through (failed login) */
390 bb_error_msg_and_die("ftp login: %s", sanitize_string(G.wget_buf + 4));
393 ftpcmd("TYPE I", NULL, sfp);
398 if (ftpcmd("SIZE ", target->path, sfp) == 213) {
399 G.content_len = BB_STRTOOFF(G.wget_buf + 4, NULL, 10);
400 if (G.content_len < 0 || errno) {
401 bb_error_msg_and_die("SIZE value is garbage");
407 * Entering passive mode
409 if (ftpcmd("PASV", NULL, sfp) != 227) {
411 bb_error_msg_and_die("bad response to %s: %s", "PASV", sanitize_string(G.wget_buf));
413 // Response is "227 garbageN1,N2,N3,N4,P1,P2[)garbage]
414 // Server's IP is N1.N2.N3.N4 (we ignore it)
415 // Server's port for data connection is P1*256+P2
416 str = strrchr(G.wget_buf, ')');
417 if (str) str[0] = '\0';
418 str = strrchr(G.wget_buf, ',');
419 if (!str) goto pasv_error;
420 port = xatou_range(str+1, 0, 255);
422 str = strrchr(G.wget_buf, ',');
423 if (!str) goto pasv_error;
424 port += xatou_range(str+1, 0, 255) * 256;
425 set_nport(&lsa->u.sa, htons(port));
427 *dfpp = open_socket(lsa);
429 if (G.beg_range != 0) {
430 sprintf(G.wget_buf, "REST %"OFF_FMT"u", G.beg_range);
431 if (ftpcmd(G.wget_buf, NULL, sfp) == 350)
432 G.content_len -= G.beg_range;
434 reset_beg_range_to_zero();
437 if (ftpcmd("RETR ", target->path, sfp) > 150)
438 bb_error_msg_and_die("bad response to %s: %s", "RETR", sanitize_string(G.wget_buf));
443 static void NOINLINE retrieve_file_data(FILE *dfp)
445 #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
446 # if ENABLE_FEATURE_WGET_TIMEOUT
449 struct pollfd polldata;
451 # if ENABLE_FEATURE_WGET_TIMEOUT
452 second_cnt = G.timeout_seconds;
454 polldata.fd = fileno(dfp);
455 polldata.events = POLLIN | POLLPRI;
457 progress_meter(PROGRESS_START);
462 /* Loops only if chunked */
465 #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
466 /* Must use nonblocking I/O, otherwise fread will loop
467 * and *block* until it reads full buffer,
468 * which messes up progress bar and/or timeout logic.
469 * Because of nonblocking I/O, we need to dance
470 * very carefully around EAGAIN. See explanation at
473 ndelay_on(polldata.fd);
479 rdsz = sizeof(G.wget_buf);
481 if (G.content_len < (off_t)sizeof(G.wget_buf)) {
482 if ((int)G.content_len <= 0)
484 rdsz = (unsigned)G.content_len;
488 #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
489 if (safe_poll(&polldata, 1, 1000) == 0) {
490 # if ENABLE_FEATURE_WGET_TIMEOUT
491 if (second_cnt != 0 && --second_cnt == 0) {
492 progress_meter(PROGRESS_END);
493 bb_error_msg_and_die("download timed out");
496 /* Needed for "stalled" indicator */
497 progress_meter(PROGRESS_BUMP);
499 * We used to loop back to poll here,
500 * but in chunked case, we can be here after
501 * fgets and it could buffer some data in dfp...
502 * which poll knows nothing about!
503 * Therefore let's try fread'ing anyway.
507 /* fread internally uses read loop, which in our case
508 * is usually exited when we get EAGAIN.
509 * In this case, libc sets error marker on the stream.
510 * Need to clear it before next fread to avoid possible
511 * rare false positive ferror below. Rare because usually
512 * fread gets more than zero bytes, and we don't fall
513 * into if (n <= 0) ...
518 n = fread(G.wget_buf, 1, rdsz, dfp);
520 * If error occurs, or EOF is reached, the return value
521 * is a short item count (or zero).
522 * fread does not distinguish between EOF and error.
525 #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
526 if (errno == EAGAIN) /* poll lied, there is no data? */
530 bb_perror_msg_and_die(bb_msg_read_error);
531 break; /* EOF, not error */
534 xwrite(G.output_fd, G.wget_buf, n);
535 #if ENABLE_FEATURE_WGET_TIMEOUT
536 second_cnt = G.timeout_seconds;
538 #if ENABLE_FEATURE_WGET_STATUSBAR
540 progress_meter(PROGRESS_BUMP);
544 if (G.content_len == 0)
548 #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
550 ndelay_off(polldata.fd); /* else fgets can get very unhappy */
555 fgets_and_trim(dfp); /* Eat empty line */
558 G.content_len = STRTOOFF(G.wget_buf, NULL, 16);
559 /* FIXME: error check? */
560 if (G.content_len == 0)
561 break; /* all done! */
565 /* If -c failed, we restart from the beginning,
566 * but we do not truncate file then, we do it only now, at the end.
567 * This lets user to ^C if his 99% complete 10 GB file download
568 * failed to restart *without* losing the almost complete file.
571 off_t pos = lseek(G.output_fd, 0, SEEK_CUR);
572 if (pos != (off_t)-1)
573 ftruncate(G.output_fd, pos);
576 /* Draw full bar and free its resources */
577 G.chunked = 0; /* makes it show 100% even for chunked download */
578 G.got_clen = 1; /* makes it show 100% even for download of (formerly) unknown size */
579 progress_meter(PROGRESS_END);
582 static void download_one_url(const char *url)
584 bool use_proxy; /* Use proxies if env vars are set */
586 len_and_sockaddr *lsa;
587 FILE *sfp; /* socket to web/ftp server */
588 FILE *dfp; /* socket to ftp server (data) */
590 char *fname_out_alloc;
591 char *redirected_path = NULL;
592 struct host_info server;
593 struct host_info target;
595 server.allocated = NULL;
596 target.allocated = NULL;
600 parse_url(url, &target);
602 /* Use the proxy if necessary */
603 use_proxy = (strcmp(G.proxy_flag, "off") != 0);
605 proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
606 use_proxy = (proxy && proxy[0]);
608 parse_url(proxy, &server);
611 server.port = target.port;
612 if (ENABLE_FEATURE_IPV6) {
613 //free(server.allocated); - can't be non-NULL
614 server.host = server.allocated = xstrdup(target.host);
616 server.host = target.host;
620 if (ENABLE_FEATURE_IPV6)
621 strip_ipv6_scope_id(target.host);
623 /* If there was no -O FILE, guess output filename */
624 fname_out_alloc = NULL;
625 if (!(option_mask32 & WGET_OPT_OUTNAME)) {
626 G.fname_out = bb_get_last_path_component_nostrip(target.path);
627 /* handle "wget http://kernel.org//" */
628 if (G.fname_out[0] == '/' || !G.fname_out[0])
629 G.fname_out = (char*)"index.html";
630 /* -P DIR is considered only if there was no -O FILE */
632 G.fname_out = fname_out_alloc = concat_path_file(G.dir_prefix, G.fname_out);
634 /* redirects may free target.path later, need to make a copy */
635 G.fname_out = fname_out_alloc = xstrdup(G.fname_out);
638 #if ENABLE_FEATURE_WGET_STATUSBAR
639 G.curfile = bb_get_last_path_component_nostrip(G.fname_out);
642 /* Determine where to start transfer */
644 if (option_mask32 & WGET_OPT_CONTINUE) {
645 G.output_fd = open(G.fname_out, O_WRONLY);
646 if (G.output_fd >= 0) {
647 G.beg_range = xlseek(G.output_fd, 0, SEEK_END);
649 /* File doesn't exist. We do not create file here yet.
650 * We are not sure it exists on remote side */
655 lsa = xhost2sockaddr(server.host, server.port);
656 if (!(option_mask32 & WGET_OPT_QUIET)) {
657 char *s = xmalloc_sockaddr2dotted(&lsa->u.sa);
658 fprintf(stderr, "Connecting to %s (%s)\n", server.host, s);
662 /*G.content_len = 0; - redundant, got_clen = 0 is enough */
665 if (use_proxy || !target.is_ftp) {
673 /* Open socket to http server */
674 sfp = open_socket(lsa);
676 /* Send HTTP request */
678 fprintf(sfp, "GET %stp://%s/%s HTTP/1.1\r\n",
679 target.is_ftp ? "f" : "ht", target.host,
682 if (option_mask32 & WGET_OPT_POST_DATA)
683 fprintf(sfp, "POST /%s HTTP/1.1\r\n", target.path);
685 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
688 fprintf(sfp, "Host: %s\r\nUser-Agent: %s\r\n",
689 target.host, G.user_agent);
691 /* Ask server to close the connection as soon as we are done
692 * (IOW: we do not intend to send more requests)
694 fprintf(sfp, "Connection: close\r\n");
696 #if ENABLE_FEATURE_WGET_AUTHENTICATION
698 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n"+6,
699 base64enc(target.user));
701 if (use_proxy && server.user) {
702 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
703 base64enc(server.user));
707 if (G.beg_range != 0)
708 fprintf(sfp, "Range: bytes=%"OFF_FMT"u-\r\n", G.beg_range);
710 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
712 fputs(G.extra_headers, sfp);
714 if (option_mask32 & WGET_OPT_POST_DATA) {
716 "Content-Type: application/x-www-form-urlencoded\r\n"
717 "Content-Length: %u\r\n"
720 (int) strlen(G.post_data), G.post_data
725 fprintf(sfp, "\r\n");
731 * Retrieve HTTP response line and check for "200" status code.
737 str = skip_non_whitespace(str);
738 str = skip_whitespace(str);
739 // FIXME: no error check
740 // xatou wouldn't work: "200 OK"
745 while (gethdr(sfp) != NULL)
746 /* eat all remaining headers */;
750 Response 204 doesn't say "null file", it says "metadata
751 has changed but data didn't":
753 "10.2.5 204 No Content
754 The server has fulfilled the request but does not need to return
755 an entity-body, and might want to return updated metainformation.
756 The response MAY include new or updated metainformation in the form
757 of entity-headers, which if present SHOULD be associated with
758 the requested variant.
760 If the client is a user agent, it SHOULD NOT change its document
761 view from that which caused the request to be sent. This response
762 is primarily intended to allow input for actions to take place
763 without causing a change to the user agent's active document view,
764 although any new or updated metainformation SHOULD be applied
765 to the document currently in the user agent's active view.
767 The 204 response MUST NOT include a message-body, and thus
768 is always terminated by the first empty line after the header fields."
770 However, in real world it was observed that some web servers
771 (e.g. Boa/0.94.14rc21) simply use code 204 when file size is zero.
774 if (G.beg_range != 0) {
775 /* "Range:..." was not honored by the server.
776 * Restart download from the beginning.
778 reset_beg_range_to_zero();
781 case 300: /* redirection */
786 case 206: /* Partial Content */
787 if (G.beg_range != 0)
788 /* "Range:..." worked. Good. */
790 /* Partial Content even though we did not ask for it??? */
793 bb_error_msg_and_die("server returned error: %s", sanitize_string(G.wget_buf));
797 * Retrieve HTTP headers.
799 while ((str = gethdr(sfp)) != NULL) {
800 static const char keywords[] ALIGN1 =
801 "content-length\0""transfer-encoding\0""location\0";
803 KEY_content_length = 1, KEY_transfer_encoding, KEY_location
807 /* gethdr converted "FOO:" string to lowercase */
809 /* strip trailing whitespace */
810 char *s = strchrnul(str, '\0') - 1;
811 while (s >= str && (*s == ' ' || *s == '\t')) {
815 key = index_in_strings(keywords, G.wget_buf) + 1;
816 if (key == KEY_content_length) {
817 G.content_len = BB_STRTOOFF(str, NULL, 10);
818 if (G.content_len < 0 || errno) {
819 bb_error_msg_and_die("content-length %s is garbage", sanitize_string(str));
824 if (key == KEY_transfer_encoding) {
825 if (strcmp(str_tolower(str), "chunked") != 0)
826 bb_error_msg_and_die("transfer encoding '%s' is not supported", sanitize_string(str));
829 if (key == KEY_location && status >= 300) {
830 if (--redir_limit == 0)
831 bb_error_msg_and_die("too many redirections");
834 free(redirected_path);
835 target.path = redirected_path = xstrdup(str+1);
836 /* lsa stays the same: it's on the same server */
838 parse_url(str, &target);
840 free(server.allocated);
841 server.allocated = NULL;
842 server.host = target.host;
843 /* strip_ipv6_scope_id(target.host); - no! */
844 /* we assume remote never gives us IPv6 addr with scope id */
845 server.port = target.port;
848 } /* else: lsa stays the same: we use proxy */
850 goto establish_session;
853 // if (status >= 300)
854 // bb_error_msg_and_die("bad redirection (no Location: header from server)");
856 /* For HTTP, data is pumped over the same connection */
863 sfp = prepare_ftp_session(&dfp, &target, lsa);
868 if (!(option_mask32 & WGET_OPT_SPIDER)) {
870 G.output_fd = xopen(G.fname_out, G.o_flags);
871 retrieve_file_data(dfp);
872 if (!(option_mask32 & WGET_OPT_OUTNAME)) {
879 /* It's ftp. Close data connection properly */
881 if (ftpcmd(NULL, NULL, sfp) != 226)
882 bb_error_msg_and_die("ftp error: %s", sanitize_string(G.wget_buf + 4));
883 /* ftpcmd("QUIT", NULL, sfp); - why bother? */
887 free(server.allocated);
888 free(target.allocated);
889 free(fname_out_alloc);
890 free(redirected_path);
893 int wget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
894 int wget_main(int argc UNUSED_PARAM, char **argv)
896 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
897 static const char wget_longopts[] ALIGN1 =
898 /* name, has_arg, val */
899 "continue\0" No_argument "c"
900 //FIXME: -s isn't --spider, it's --save-headers!
901 "spider\0" No_argument "s"
902 "quiet\0" No_argument "q"
903 "output-document\0" Required_argument "O"
904 "directory-prefix\0" Required_argument "P"
905 "proxy\0" Required_argument "Y"
906 "user-agent\0" Required_argument "U"
907 #if ENABLE_FEATURE_WGET_TIMEOUT
908 "timeout\0" Required_argument "T"
911 // "tries\0" Required_argument "t"
912 /* Ignored (we always use PASV): */
913 "passive-ftp\0" No_argument "\xff"
914 "header\0" Required_argument "\xfe"
915 "post-data\0" Required_argument "\xfd"
916 /* Ignored (we don't do ssl) */
917 "no-check-certificate\0" No_argument "\xfc"
918 /* Ignored (we don't support caching) */
919 "no-cache\0" No_argument "\xfb"
923 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
924 llist_t *headers_llist = NULL;
929 IF_FEATURE_WGET_TIMEOUT(G.timeout_seconds = 900;)
930 G.proxy_flag = "on"; /* use proxies if env vars are set */
931 G.user_agent = "Wget"; /* "User-Agent" header field */
933 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
934 applet_long_options = wget_longopts;
936 opt_complementary = "-1" IF_FEATURE_WGET_TIMEOUT(":T+") IF_FEATURE_WGET_LONG_OPTIONS(":\xfe::");
937 getopt32(argv, "csqO:P:Y:U:T:" /*ignored:*/ "t:",
938 &G.fname_out, &G.dir_prefix,
939 &G.proxy_flag, &G.user_agent,
940 IF_FEATURE_WGET_TIMEOUT(&G.timeout_seconds) IF_NOT_FEATURE_WGET_TIMEOUT(NULL),
941 NULL /* -t RETRIES */
942 IF_FEATURE_WGET_LONG_OPTIONS(, &headers_llist)
943 IF_FEATURE_WGET_LONG_OPTIONS(, &G.post_data)
947 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
951 llist_t *ll = headers_llist;
953 size += strlen(ll->data) + 2;
956 G.extra_headers = cp = xmalloc(size);
957 while (headers_llist) {
958 cp += sprintf(cp, "%s\r\n", (char*)llist_pop(&headers_llist));
964 G.o_flags = O_WRONLY | O_CREAT | O_TRUNC | O_EXCL;
965 if (G.fname_out) { /* -O FILE ? */
966 if (LONE_DASH(G.fname_out)) { /* -O - ? */
968 option_mask32 &= ~WGET_OPT_CONTINUE;
970 /* compat with wget: -O FILE can overwrite */
971 G.o_flags = O_WRONLY | O_CREAT | O_TRUNC;
975 download_one_url(*argv++);
977 if (G.output_fd >= 0)