1 /* $NetBSD: fetch.c,v 1.198 2012/07/04 06:09:37 is Exp $ */
4 * Copyright (c) 1997-2009 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Scott Aaron Bamford.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
37 __RCSID("$NetBSD: fetch.c,v 1.198 2012/07/04 06:09:37 is Exp $");
41 * FTP User Program -- Command line file retrieval
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
50 #include <netinet/in.h>
53 #include <arpa/inet.h>
79 __dead static void aborthttp(int);
81 static int auth_url(const char *, char **, const char *, const char *);
82 static void base64_encode(const unsigned char *, size_t, unsigned char *);
84 static int go_fetch(const char *);
85 static int fetch_ftp(const char *);
86 static int fetch_url(const char *, const char *, char *, char *);
87 static const char *match_token(const char **, const char *);
88 static int parse_url(const char *, const char *, url_t *, char **,
89 char **, char **, char **, in_port_t *, char **);
90 static void url_decode(char *);
92 static int redirect_loop;
95 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0)
96 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
97 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0)
100 #define ABOUT_URL "about:" /* propaganda */
101 #define FILE_URL "file://" /* file URL prefix */
102 #define FTP_URL "ftp://" /* ftp URL prefix */
103 #define HTTP_URL "http://" /* http URL prefix */
107 * Determine if token is the next word in buf (case insensitive).
108 * If so, advance buf past the token and any trailing LWS, and
109 * return a pointer to the token (in buf). Otherwise, return NULL.
110 * token may be preceded by LWS.
111 * token must be followed by LWS or NUL. (I.e, don't partial match).
114 match_token(const char **buf, const char *token)
116 const char *p, *orig;
119 tlen = strlen(token);
123 if (strncasecmp(p, token, tlen) != 0)
126 if (*p != '\0' && !ISLWS(*p))
136 * Generate authorization response based on given authentication challenge.
137 * Returns -1 if an error occurred, otherwise 0.
138 * Sets response to a malloc(3)ed string; caller should free.
141 auth_url(const char *challenge, char **response, const char *guser,
144 const char *cp, *scheme, *errormsg;
145 char *ep, *clear, *realm;
146 char uuser[BUFSIZ], *gotpass;
149 size_t len, clen, rlen;
152 clear = realm = NULL;
155 scheme = "Basic"; /* only support Basic authentication */
158 DPRINTF("auth_url: challenge `%s'\n", challenge);
160 if (! match_token(&cp, scheme)) {
161 warnx("Unsupported authentication challenge `%s'",
163 goto cleanup_auth_url;
166 #define REALM "realm=\""
167 if (STRNEQUAL(cp, REALM))
168 cp += sizeof(REALM) - 1;
170 warnx("Unsupported authentication challenge `%s'",
172 goto cleanup_auth_url;
174 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
175 if ((ep = strchr(cp, '\"')) != NULL) {
177 realm = (char *)ftp_malloc(len + 1);
178 (void)strlcpy(realm, cp, len + 1);
180 warnx("Unsupported authentication challenge `%s'",
182 goto cleanup_auth_url;
185 fprintf(ttyout, "Username for `%s': ", realm);
187 (void)strlcpy(uuser, guser, sizeof(uuser));
188 fprintf(ttyout, "%s\n", uuser);
190 (void)fflush(ttyout);
191 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) {
192 warnx("%s; can't authenticate", errormsg);
193 goto cleanup_auth_url;
199 gotpass = getpass("Password: ");
200 if (gotpass == NULL) {
201 warnx("Can't read password");
202 goto cleanup_auth_url;
207 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */
208 clear = (char *)ftp_malloc(clen);
209 (void)strlcpy(clear, uuser, clen);
210 (void)strlcat(clear, ":", clen);
211 (void)strlcat(clear, upass, clen);
213 memset(gotpass, 0, strlen(gotpass));
215 /* scheme + " " + enc + "\0" */
216 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
217 *response = (char *)ftp_malloc(rlen);
218 (void)strlcpy(*response, scheme, rlen);
219 len = strlcat(*response, " ", rlen);
220 /* use `clen - 1' to not encode the trailing NUL */
221 base64_encode((unsigned char *)clear, clen - 1,
222 (unsigned char *)*response + len);
223 memset(clear, 0, clen);
233 * Encode len bytes starting at clear using base64 encoding into encoded,
234 * which should be at least ((len + 2) * 4 / 3 + 1) in size.
237 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
239 static const unsigned char enc[] =
240 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
245 for (i = 0; i < len; i += 3) {
246 *(cp++) = enc[((clear[i + 0] >> 2))];
247 *(cp++) = enc[((clear[i + 0] << 4) & 0x30)
248 | ((clear[i + 1] >> 4) & 0x0f)];
249 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
250 | ((clear[i + 2] >> 6) & 0x03)];
251 *(cp++) = enc[((clear[i + 2] ) & 0x3f)];
260 * Decode %xx escapes in given string, `in-place'.
263 url_decode(char *url)
265 unsigned char *p, *q;
267 if (EMPTYSTRING(url))
269 p = q = (unsigned char *)url;
271 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
274 && p[1] && isxdigit((unsigned char)p[1])
275 && p[2] && isxdigit((unsigned char)p[2])) {
276 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
286 * Parse URL of form (per RFC 3986):
287 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
288 * Returns -1 if a parse error occurred, otherwise 0.
289 * It's the caller's responsibility to url_decode() the returned
290 * user, pass and path.
292 * Sets type to url_t, each of the given char ** pointers to a
293 * malloc(3)ed strings of the relevant section, and port to
294 * the number given, or ftpport if ftp://, or httpport if http://.
296 * XXX: this is not totally RFC 3986 compliant; <path> will have the
297 * leading `/' unless it's an ftp:// URL, as this makes things easier
298 * for file:// and http:// URLs. ftp:// URLs have the `/' between the
299 * host and the URL-path removed, but any additional leading slashes
300 * in the URL-path are retained (because they imply that we should
301 * later do "CWD" with a null argument).
304 * input URL output path
305 * --------- -----------
308 * "http://host/path" "/path"
309 * "file://host/dir/file" "dir/file"
313 * "ftp://host/dir/file" "dir/file"
314 * "ftp://host//dir/file" "/dir/file"
317 parse_url(const char *url, const char *desc, url_t *utype,
318 char **uuser, char **pass, char **host, char **port,
319 in_port_t *portnum, char **path)
321 const char *origurl, *tport;
322 char *cp, *ep, *thost;
325 if (url == NULL || desc == NULL || utype == NULL || uuser == NULL
326 || pass == NULL || host == NULL || port == NULL || portnum == NULL
328 errx(1, "parse_url: invoked with NULL argument!");
329 DPRINTF("parse_url: %s `%s'\n", desc, url);
332 *utype = UNKNOWN_URL_T;
333 *uuser = *pass = *host = *port = *path = NULL;
337 if (STRNEQUAL(url, HTTP_URL)) {
338 url += sizeof(HTTP_URL) - 1;
340 *portnum = HTTP_PORT;
342 } else if (STRNEQUAL(url, FTP_URL)) {
343 url += sizeof(FTP_URL) - 1;
347 } else if (STRNEQUAL(url, FILE_URL)) {
348 url += sizeof(FILE_URL) - 1;
351 warnx("Invalid %s `%s'", desc, url);
355 memset(*pass, 0, strlen(*pass));
366 /* find [user[:pass]@]host[:port] */
367 ep = strchr(url, '/');
369 thost = ftp_strdup(url);
372 thost = (char *)ftp_malloc(len + 1);
373 (void)strlcpy(thost, url, len + 1);
374 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
376 *path = ftp_strdup(ep);
379 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
381 if (*utype == FTP_URL_T)
382 anonftp = 0; /* disable anonftp */
385 thost = ftp_strdup(cp + 1);
386 cp = strchr(*uuser, ':');
389 *pass = ftp_strdup(cp + 1);
398 * Check if thost is an encoded IPv6 address, as per
400 * `[' ipv6-address ']'
404 if ((ep = strchr(cp, ']')) == NULL ||
405 (ep[1] != '\0' && ep[1] != ':')) {
406 warnx("Invalid address `%s' in %s `%s'",
407 thost, desc, origurl);
408 goto cleanup_parse_url;
410 len = ep - cp; /* change `[xyz]' -> `xyz' */
411 memmove(thost, thost + 1, len);
413 if (! isipv6addr(thost)) {
414 warnx("Invalid IPv6 address `%s' in %s `%s'",
415 thost, desc, origurl);
416 goto cleanup_parse_url;
425 if ((cp = strchr(thost, ':')) != NULL)
429 /* look for [:port] */
433 nport = strtoul(cp, &ep, 10);
434 if (*cp == '\0' || *ep != '\0' ||
435 nport < 1 || nport > MAX_IN_PORT_T) {
436 warnx("Unknown port `%s' in %s `%s'",
438 goto cleanup_parse_url;
445 *port = ftp_strdup(tport);
447 const char *emptypath = "/";
448 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
450 *path = ftp_strdup(emptypath);
453 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
455 STRorNULL(*uuser), STRorNULL(*pass),
456 STRorNULL(*host), STRorNULL(*port),
457 *portnum ? *portnum : -1, STRorNULL(*path));
462 sigjmp_buf httpabort;
465 * Retrieve URL, via a proxy if necessary, using HTTP.
466 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
467 * http_proxy as appropriate.
468 * Supports HTTP redirects.
469 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
470 * is still open (e.g, ftp xfer with trailing /)
473 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
475 struct addrinfo hints, *res, *res0 = NULL;
477 sigfunc volatile oldintr;
478 sigfunc volatile oldintp;
481 int volatile ischunked;
482 int volatile isproxy;
487 static size_t bufsize;
488 static char *xferbuf;
489 const char *cp, *token;
492 const char *errormsg;
493 char *volatile savefile;
495 char *volatile location;
496 char *volatile message;
497 char *uuser, *pass, *host, *port, *path;
498 char *volatile decodedpath;
499 char *puser, *ppass, *useragent;
500 off_t hashbytes, rangestart, rangeend, entitylen;
501 int (*volatile closefunc)(FILE *);
508 DPRINTF("fetch_url: `%s' proxyenv `%s'\n", url, STRorNULL(proxyenv));
510 oldintr = oldintp = NULL;
515 auth = location = message = NULL;
516 ischunked = isproxy = hcode = 0;
518 uuser = pass = host = path = decodedpath = puser = ppass = NULL;
520 if (parse_url(url, "URL", &urltype, &uuser, &pass, &host, &port,
521 &portnum, &path) == -1)
522 goto cleanup_fetch_url;
524 if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
525 && strcasecmp(host, "localhost") != 0) {
526 warnx("No support for non local file URL `%s'", url);
527 goto cleanup_fetch_url;
530 if (EMPTYSTRING(path)) {
531 if (urltype == FTP_URL_T) {
532 rval = fetch_ftp(url);
533 goto cleanup_fetch_url;
535 if (urltype != HTTP_URL_T || outfile == NULL) {
536 warnx("Invalid URL (no file after host) `%s'", url);
537 goto cleanup_fetch_url;
541 decodedpath = ftp_strdup(path);
542 url_decode(decodedpath);
545 savefile = ftp_strdup(outfile);
547 cp = strrchr(decodedpath, '/'); /* find savefile */
549 savefile = ftp_strdup(cp + 1);
551 savefile = ftp_strdup(decodedpath);
553 DPRINTF("fetch_url: savefile `%s'\n", savefile);
554 if (EMPTYSTRING(savefile)) {
555 if (urltype == FTP_URL_T) {
556 rval = fetch_ftp(url);
557 goto cleanup_fetch_url;
559 warnx("No file after directory (you must specify an "
560 "output file) `%s'", url);
561 goto cleanup_fetch_url;
566 rangestart = rangeend = entitylen = -1;
568 if (restartautofetch) {
569 if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
570 stat(savefile, &sb) == 0)
571 restart_point = sb.st_size;
573 if (urltype == FILE_URL_T) { /* file:// URLs */
574 direction = "copied";
575 fin = fopen(decodedpath, "r");
577 warn("Can't open `%s'", decodedpath);
578 goto cleanup_fetch_url;
580 if (fstat(fileno(fin), &sb) == 0) {
582 filesize = sb.st_size;
585 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
586 warn("Can't seek to restart `%s'",
588 goto cleanup_fetch_url;
592 fprintf(ttyout, "Copying %s", decodedpath);
594 fprintf(ttyout, " (restarting at " LLF ")",
598 } else { /* ftp:// or http:// URLs */
602 if (proxyenv == NULL) {
603 if (urltype == HTTP_URL_T)
604 proxyenv = getoptionvalue("http_proxy");
605 else if (urltype == FTP_URL_T)
606 proxyenv = getoptionvalue("ftp_proxy");
608 direction = "retrieved";
609 if (! EMPTYSTRING(proxyenv)) { /* use proxy */
612 char *pport, *no_proxy;
617 /* check URL against list of no_proxied sites */
618 no_proxy = getoptionvalue("no_proxy");
619 if (! EMPTYSTRING(no_proxy)) {
620 char *np, *np_copy, *np_iter;
621 unsigned long np_port;
624 np_iter = np_copy = ftp_strdup(no_proxy);
626 while ((cp = strsep(&np_iter, " ,")) != NULL) {
629 if ((np = strrchr(cp, ':')) != NULL) {
631 np_port = strtoul(np, &ep, 10);
632 if (*np == '\0' || *ep != '\0')
634 if (np_port != portnum)
640 if (strncasecmp(host + hlen - plen,
647 if (isproxy == 0 && urltype == FTP_URL_T) {
648 rval = fetch_ftp(url);
649 goto cleanup_fetch_url;
655 warnx("Can't restart via proxy URL `%s'",
657 goto cleanup_fetch_url;
659 if (parse_url(proxyenv, "proxy URL", &purltype,
660 &puser, &ppass, &phost, &pport, &pportnum,
662 goto cleanup_fetch_url;
664 if ((purltype != HTTP_URL_T
665 && purltype != FTP_URL_T) ||
666 EMPTYSTRING(phost) ||
667 (! EMPTYSTRING(ppath)
668 && strcmp(ppath, "/") != 0)) {
669 warnx("Malformed proxy URL `%s'",
674 goto cleanup_fetch_url;
676 if (isipv6addr(host) &&
677 strchr(host, '%') != NULL) {
679 "Scoped address notation `%s' disallowed via web proxy",
684 goto cleanup_fetch_url;
692 path = ftp_strdup(url);
695 } /* ! EMPTYSTRING(proxyenv) */
697 memset(&hints, 0, sizeof(hints));
699 hints.ai_family = family;
700 hints.ai_socktype = SOCK_STREAM;
701 hints.ai_protocol = 0;
702 error = getaddrinfo(host, port, &hints, &res0);
704 warnx("Can't LOOKUP `%s:%s': %s", host, port,
705 (error == EAI_SYSTEM) ? strerror(errno)
706 : gai_strerror(error));
707 goto cleanup_fetch_url;
709 if (res0->ai_canonname)
710 host = res0->ai_canonname;
713 for (res = res0; res; res = res->ai_next) {
714 char hname[NI_MAXHOST], sname[NI_MAXSERV];
717 if (getnameinfo(res->ai_addr, res->ai_addrlen,
718 hname, sizeof(hname), sname, sizeof(sname),
719 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
720 strlcpy(hname, "?", sizeof(hname));
721 strlcpy(sname, "?", sizeof(sname));
724 if (verbose && res0->ai_next) {
725 fprintf(ttyout, "Trying %s:%s ...\n",
729 s = socket(res->ai_family, SOCK_STREAM,
733 "Can't create socket for connection to "
734 "`%s:%s'", hname, sname);
738 if (ftp_connect(s, res->ai_addr, res->ai_addrlen,
739 verbose || !res->ai_next) < 0) {
750 warnx("Can't connect to `%s:%s'", host, port);
751 goto cleanup_fetch_url;
754 fin = fdopen(s, "r+");
756 * Construct and send the request.
759 fprintf(ttyout, "Requesting %s\n", url);
764 fprintf(ttyout, "%svia %s:%s", leading,
769 fprintf(fin, "GET %s HTTP/1.0\r\n", path);
771 fprintf(fin, "Pragma: no-cache\r\n");
773 fprintf(fin, "GET %s HTTP/1.1\r\n", path);
774 if (strchr(host, ':')) {
778 * strip off IPv6 scope identifier, since it is
781 h = ftp_strdup(host);
783 (p = strchr(h, '%')) != NULL) {
786 fprintf(fin, "Host: [%s]", h);
789 fprintf(fin, "Host: %s", host);
790 if (portnum != HTTP_PORT)
791 fprintf(fin, ":%u", portnum);
792 fprintf(fin, "\r\n");
793 fprintf(fin, "Accept: */*\r\n");
794 fprintf(fin, "Connection: close\r\n");
796 fputs(leading, ttyout);
797 fprintf(fin, "Range: bytes=" LLF "-\r\n",
799 fprintf(ttyout, "restarting at " LLF,
805 fprintf(fin, "Cache-Control: no-cache\r\n");
807 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
808 fprintf(fin, "User-Agent: %s\r\n", useragent);
810 fprintf(fin, "User-Agent: %s/%s\r\n",
811 FTP_PRODUCT, FTP_VERSION);
815 fprintf(ttyout, "%swith authorization",
820 fprintf(fin, "Authorization: %s\r\n", wwwauth);
825 "%swith proxy authorization", leading);
829 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
831 if (verbose && hasleading)
832 fputs(")\n", ttyout);
833 fprintf(fin, "\r\n");
834 if (fflush(fin) == EOF) {
835 warn("Writing HTTP request");
836 goto cleanup_fetch_url;
839 /* Read the response */
840 len = get_line(fin, buf, sizeof(buf), &errormsg);
842 if (*errormsg == '\n')
844 warnx("Receiving HTTP reply: %s", errormsg);
845 goto cleanup_fetch_url;
847 while (len > 0 && (ISLWS(buf[len-1])))
849 DPRINTF("fetch_url: received `%s'\n", buf);
851 /* Determine HTTP response code */
852 cp = strchr(buf, ' ');
857 hcode = strtol(cp, &ep, 10);
858 if (*ep != '\0' && !isspace((unsigned char)*ep))
860 message = ftp_strdup(cp);
862 /* Read the rest of the header. */
864 len = get_line(fin, buf, sizeof(buf), &errormsg);
866 if (*errormsg == '\n')
868 warnx("Receiving HTTP reply: %s", errormsg);
869 goto cleanup_fetch_url;
871 while (len > 0 && (ISLWS(buf[len-1])))
875 DPRINTF("fetch_url: received `%s'\n", buf);
878 * Look for some headers
883 if (match_token(&cp, "Content-Length:")) {
884 filesize = STRTOLL(cp, &ep, 10);
885 if (filesize < 0 || *ep != '\0')
887 DPRINTF("fetch_url: parsed len as: " LLF "\n",
890 } else if (match_token(&cp, "Content-Range:")) {
891 if (! match_token(&cp, "bytes"))
897 rangestart = STRTOLL(cp, &ep, 10);
898 if (rangestart < 0 || *ep != '-')
901 rangeend = STRTOLL(cp, &ep, 10);
902 if (rangeend < 0 || rangeend < rangestart)
912 entitylen = STRTOLL(cp, &ep, 10);
922 fprintf(ttyout, "parsed range as: ");
923 if (rangestart == -1)
924 fprintf(ttyout, "*");
926 fprintf(ttyout, LLF "-" LLF,
929 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
932 if (! restart_point) {
934 "Received unexpected Content-Range header");
935 goto cleanup_fetch_url;
938 } else if (match_token(&cp, "Last-Modified:")) {
942 memset(&parsed, 0, sizeof(parsed));
943 t = parse_rfc2616time(&parsed, cp);
945 parsed.tm_isdst = -1;
947 mtime = timegm(&parsed);
949 if (ftp_debug && mtime != -1) {
951 "parsed time as: %s",
952 rfc2822time(localtime(&mtime)));
957 } else if (match_token(&cp, "Location:")) {
958 location = ftp_strdup(cp);
959 DPRINTF("fetch_url: parsed location as `%s'\n",
962 } else if (match_token(&cp, "Transfer-Encoding:")) {
963 if (match_token(&cp, "binary")) {
965 "Bogus transfer encoding `binary' (fetching anyway)");
968 if (! (token = match_token(&cp, "chunked"))) {
970 "Unsupported transfer encoding `%s'",
972 goto cleanup_fetch_url;
975 DPRINTF("fetch_url: using chunked encoding\n");
977 } else if (match_token(&cp, "Proxy-Authenticate:")
978 || match_token(&cp, "WWW-Authenticate:")) {
979 if (! (token = match_token(&cp, "Basic"))) {
981 "fetch_url: skipping unknown auth scheme `%s'\n",
986 auth = ftp_strdup(token);
987 DPRINTF("fetch_url: parsed auth as `%s'\n", cp);
991 /* finished parsing header */
997 if (! restart_point) {
998 warnx("Not expecting partial content header");
999 goto cleanup_fetch_url;
1008 if (EMPTYSTRING(location)) {
1010 "No redirection Location provided by server");
1011 goto cleanup_fetch_url;
1013 if (redirect_loop++ > 5) {
1014 warnx("Too many redirections requested");
1015 goto cleanup_fetch_url;
1019 fprintf(ttyout, "Redirected via %s\n",
1021 rval = fetch_url(url, location,
1022 proxyauth, wwwauth);
1025 fprintf(ttyout, "Redirected to %s\n",
1027 rval = go_fetch(location);
1029 goto cleanup_fetch_url;
1035 char *auser, *apass;
1046 if (verbose || *authp == NULL ||
1047 auser == NULL || apass == NULL)
1048 fprintf(ttyout, "%s\n", message);
1049 if (EMPTYSTRING(auth)) {
1051 "No authentication challenge provided by server");
1052 goto cleanup_fetch_url;
1054 if (*authp != NULL) {
1058 "Authorization failed. Retry (y/n)? ");
1059 if (get_line(stdin, reply, sizeof(reply), NULL)
1061 goto cleanup_fetch_url;
1063 if (tolower((unsigned char)reply[0]) != 'y')
1064 goto cleanup_fetch_url;
1068 if (auth_url(auth, authp, auser, apass) == 0) {
1069 rval = fetch_url(url, proxyenv,
1070 proxyauth, wwwauth);
1071 memset(*authp, 0, strlen(*authp));
1074 goto cleanup_fetch_url;
1079 warnx("Error retrieving file `%s'", message);
1081 warnx("Unknown error retrieving file");
1082 goto cleanup_fetch_url;
1084 } /* end of ftp:// or http:// specific setup */
1086 /* Open the output file. */
1087 if (strcmp(savefile, "-") == 0) {
1089 } else if (*savefile == '|') {
1090 oldintp = xsignal(SIGPIPE, SIG_IGN);
1091 fout = popen(savefile + 1, "w");
1093 warn("Can't execute `%s'", savefile + 1);
1094 goto cleanup_fetch_url;
1098 if ((rangeend != -1 && rangeend <= restart_point) ||
1099 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1102 fprintf(ttyout, "already done\n");
1104 goto cleanup_fetch_url;
1106 if (restart_point && rangestart != -1) {
1107 if (entitylen != -1)
1108 filesize = entitylen;
1109 if (rangestart != restart_point) {
1111 "Size of `%s' differs from save file `%s'",
1113 goto cleanup_fetch_url;
1115 fout = fopen(savefile, "a");
1117 fout = fopen(savefile, "w");
1119 warn("Can't open `%s'", savefile);
1120 goto cleanup_fetch_url;
1126 if (sigsetjmp(httpabort, 1))
1127 goto cleanup_fetch_url;
1128 (void)xsignal(SIGQUIT, psummary);
1129 oldintr = xsignal(SIGINT, aborthttp);
1131 assert(rcvbuf_size > 0);
1132 if ((size_t)rcvbuf_size > bufsize) {
1134 (void)free(xferbuf);
1135 bufsize = rcvbuf_size;
1136 xferbuf = ftp_malloc(bufsize);
1143 /* Finally, suck down the file. */
1150 /* read chunk-size */
1152 if (fgets(xferbuf, bufsize, fin) == NULL) {
1153 warnx("Unexpected EOF reading chunk-size");
1154 goto cleanup_fetch_url;
1157 chunksize = strtol(xferbuf, &ep, 16);
1158 if (ep == xferbuf) {
1159 warnx("Invalid chunk-size");
1160 goto cleanup_fetch_url;
1162 if (errno == ERANGE || chunksize < 0) {
1164 warn("Chunk-size `%.*s'",
1165 (int)(ep-xferbuf), xferbuf);
1166 goto cleanup_fetch_url;
1170 * XXX: Work around bug in Apache 1.3.9 and
1171 * 1.3.11, which incorrectly put trailing
1172 * space after the chunk-size.
1177 /* skip [ chunk-ext ] */
1179 while (*ep && *ep != '\r')
1183 if (strcmp(ep, "\r\n") != 0) {
1184 warnx("Unexpected data following chunk-size");
1185 goto cleanup_fetch_url;
1187 DPRINTF("fetch_url: got chunk-size of " LLF "\n",
1189 if (chunksize == 0) {
1194 /* transfer file or chunk */
1196 struct timeval then, now, td;
1200 (void)gettimeofday(&then, NULL);
1201 bufrem = rate_get ? rate_get : (off_t)bufsize;
1203 bufrem = MIN(chunksize, bufrem);
1204 while (bufrem > 0) {
1205 flen = fread(xferbuf, sizeof(char),
1206 MIN((off_t)bufsize, bufrem), fin);
1211 if (fwrite(xferbuf, sizeof(char), flen, fout)
1213 warn("Writing `%s'", savefile);
1214 goto cleanup_fetch_url;
1216 if (hash && !progress) {
1217 while (bytes >= hashbytes) {
1218 (void)putc('#', ttyout);
1221 (void)fflush(ttyout);
1231 (void)gettimeofday(&now, NULL);
1232 timersub(&now, &then, &td);
1235 usleep(1000000 - td.tv_usec);
1238 if (ischunked && chunksize <= 0)
1241 /* read CRLF after chunk*/
1244 if (fgets(xferbuf, bufsize, fin) == NULL) {
1245 warnx("Unexpected EOF reading chunk CRLF");
1246 goto cleanup_fetch_url;
1248 if (strcmp(xferbuf, "\r\n") != 0) {
1249 warnx("Unexpected data following chunk");
1250 goto cleanup_fetch_url;
1255 } while (ischunked);
1257 /* XXX: deal with optional trailer & CRLF here? */
1259 if (hash && !progress && bytes > 0) {
1261 (void)putc('#', ttyout);
1262 (void)putc('\n', ttyout);
1265 warn("Reading file");
1266 goto cleanup_fetch_url;
1270 if (closefunc == fclose && mtime != -1) {
1271 struct timeval tval[2];
1273 (void)gettimeofday(&tval[0], NULL);
1274 tval[1].tv_sec = mtime;
1275 tval[1].tv_usec = 0;
1279 if (utimes(savefile, tval) == -1) {
1281 "Can't change modification time to %s",
1282 rfc2822time(localtime(&mtime)));
1290 goto cleanup_fetch_url;
1293 warnx("Improper response from `%s:%s'", host, port);
1297 (void)xsignal(SIGINT, oldintr);
1299 (void)xsignal(SIGPIPE, oldintp);
1304 if (closefunc != NULL && fout != NULL)
1311 memset(pass, 0, strlen(pass));
1316 FREEPTR(decodedpath);
1319 memset(ppass, 0, strlen(ppass));
1328 * Abort a HTTP retrieval
1331 aborthttp(int notused)
1338 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1339 write(fileno(ttyout), msgbuf, len);
1340 siglongjmp(httpabort, 1);
1344 * Retrieve ftp URL or classic ftp argument using FTP.
1345 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1346 * is still open (e.g, ftp xfer with trailing /)
1349 fetch_ftp(const char *url)
1351 char *cp, *xargv[5], rempath[MAXPATHLEN];
1352 char *host, *path, *dir, *file, *uuser, *pass;
1354 char cmdbuf[MAXPATHLEN];
1356 int dirhasglob, filehasglob, rval, transtype, xargc;
1357 int oanonftp, oautologin;
1361 DPRINTF("fetch_ftp: `%s'\n", url);
1362 host = path = dir = file = uuser = pass = NULL;
1367 if (STRNEQUAL(url, FTP_URL)) {
1368 if ((parse_url(url, "URL", &urltype, &uuser, &pass,
1369 &host, &port, &portnum, &path) == -1) ||
1370 (uuser != NULL && *uuser == '\0') ||
1371 EMPTYSTRING(host)) {
1372 warnx("Invalid URL `%s'", url);
1373 goto cleanup_fetch_ftp;
1376 * Note: Don't url_decode(path) here. We need to keep the
1377 * distinction between "/" and "%2F" until later.
1380 /* check for trailing ';type=[aid]' */
1381 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1382 if (strcasecmp(cp, ";type=a") == 0)
1384 else if (strcasecmp(cp, ";type=i") == 0)
1386 else if (strcasecmp(cp, ";type=d") == 0) {
1388 "Directory listing via a URL is not supported");
1389 goto cleanup_fetch_ftp;
1391 warnx("Invalid suffix `%s' in URL `%s'", cp,
1393 goto cleanup_fetch_ftp;
1397 } else { /* classic style `[user@]host:[file]' */
1398 urltype = CLASSIC_URL_T;
1399 host = ftp_strdup(url);
1400 cp = strchr(host, '@');
1404 anonftp = 0; /* disable anonftp */
1405 host = ftp_strdup(cp + 1);
1407 cp = strchr(host, ':');
1410 path = ftp_strdup(cp + 1);
1413 if (EMPTYSTRING(host))
1414 goto cleanup_fetch_ftp;
1416 /* Extract the file and (if present) directory name. */
1418 if (! EMPTYSTRING(dir)) {
1420 * If we are dealing with classic `[user@]host:[path]' syntax,
1421 * then a path of the form `/file' (resulting from input of the
1422 * form `host:/file') means that we should do "CWD /" before
1423 * retrieving the file. So we set dir="/" and file="file".
1425 * But if we are dealing with URLs like `ftp://host/path' then
1426 * a path of the form `/file' (resulting from a URL of the form
1427 * `ftp://host//file') means that we should do `CWD ' (with an
1428 * empty argument) before retrieving the file. So we set
1429 * dir="" and file="file".
1431 * If the path does not contain / at all, we set dir=NULL.
1432 * (We get a path without any slashes if we are dealing with
1433 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1435 * In all other cases, we set dir to a string that does not
1436 * include the final '/' that separates the dir part from the
1437 * file part of the path. (This will be the empty string if
1438 * and only if we are dealing with a path of the form `/file'
1439 * resulting from an URL of the form `ftp://host//file'.)
1441 cp = strrchr(dir, '/');
1442 if (cp == dir && urltype == CLASSIC_URL_T) {
1444 (void)strlcpy(dirbuf, "/", sizeof(dirbuf));
1446 } else if (cp != NULL) {
1455 if (urltype == FTP_URL_T && file != NULL) {
1457 /* but still don't url_decode(dir) */
1459 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1460 "path `%s' dir `%s' file `%s'\n",
1461 STRorNULL(uuser), STRorNULL(pass),
1462 STRorNULL(host), STRorNULL(port),
1463 STRorNULL(path), STRorNULL(dir), STRorNULL(file));
1465 dirhasglob = filehasglob = 0;
1466 if (doglob && urltype == CLASSIC_URL_T) {
1467 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1469 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1473 /* Set up the connection */
1476 disconnect(0, NULL);
1478 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf));
1488 oautologin = autologin;
1489 /* don't autologin in setpeer(), use ftp_login() below */
1491 setpeer(xargc, xargv);
1492 autologin = oautologin;
1493 if ((connected == 0) ||
1494 (connected == 1 && !ftp_login(host, uuser, pass))) {
1495 warnx("Can't connect or login to host `%s:%s'",
1496 host, port ? port : "?");
1497 goto cleanup_fetch_ftp;
1500 switch (transtype) {
1505 setbinary(1, xargv);
1508 errx(1, "fetch_ftp: unknown transfer type %d", transtype);
1512 * Change directories, if necessary.
1514 * Note: don't use EMPTYSTRING(dir) below, because
1515 * dir=="" means something different from dir==NULL.
1517 if (dir != NULL && !dirhasglob) {
1521 * If we are dealing with a classic `[user@]host:[path]'
1522 * (urltype is CLASSIC_URL_T) then we have a raw directory
1523 * name (not encoded in any way) and we can change
1524 * directories in one step.
1526 * If we are dealing with an `ftp://host/path' URL
1527 * (urltype is FTP_URL_T), then RFC 3986 says we need to
1528 * send a separate CWD command for each unescaped "/"
1529 * in the path, and we have to interpret %hex escaping
1530 * *after* we find the slashes. It's possible to get
1531 * empty components here, (from multiple adjacent
1532 * slashes in the path) and RFC 3986 says that we should
1533 * still do `CWD ' (with a null argument) in such cases.
1535 * Many ftp servers don't support `CWD ', so if there's an
1536 * error performing that command, bail out with a descriptive
1541 * host: dir="", urltype=CLASSIC_URL_T
1542 * logged in (to default directory)
1543 * host:file dir=NULL, urltype=CLASSIC_URL_T
1545 * host:dir/ dir="dir", urltype=CLASSIC_URL_T
1546 * "CWD dir", logged in
1547 * ftp://host/ dir="", urltype=FTP_URL_T
1548 * logged in (to default directory)
1549 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
1550 * "CWD dir", logged in
1551 * ftp://host/file dir=NULL, urltype=FTP_URL_T
1553 * ftp://host//file dir="", urltype=FTP_URL_T
1554 * "CWD ", "RETR file"
1555 * host:/file dir="/", urltype=CLASSIC_URL_T
1556 * "CWD /", "RETR file"
1557 * ftp://host///file dir="/", urltype=FTP_URL_T
1558 * "CWD ", "CWD ", "RETR file"
1559 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
1560 * "CWD /", "RETR file"
1561 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
1562 * "CWD foo", "RETR file"
1563 * ftp://host/foo/bar/file dir="foo/bar"
1564 * "CWD foo", "CWD bar", "RETR file"
1565 * ftp://host//foo/bar/file dir="/foo/bar"
1566 * "CWD ", "CWD foo", "CWD bar", "RETR file"
1567 * ftp://host/foo//bar/file dir="foo//bar"
1568 * "CWD foo", "CWD ", "CWD bar", "RETR file"
1569 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
1570 * "CWD /", "CWD foo", "CWD bar", "RETR file"
1571 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
1572 * "CWD /foo", "CWD bar", "RETR file"
1573 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
1574 * "CWD /foo/bar", "RETR file"
1575 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
1576 * "RETR /foo/bar/file"
1578 * Note that we don't need `dir' after this point.
1581 if (urltype == FTP_URL_T) {
1582 nextpart = strchr(dir, '/');
1590 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n",
1591 STRorNULL(dir), STRorNULL(nextpart));
1592 if (urltype == FTP_URL_T || *dir != '\0') {
1593 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf));
1600 if (*dir == '\0' && code == 500)
1603 "ftp: The `CWD ' command (without a directory), which is required by\n"
1604 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n"
1605 " conflicts with the server's conformance to RFC 959.\n"
1606 " Try the same URL without the `//' in the URL pathname.\n"
1608 goto cleanup_fetch_ftp;
1612 } while (dir != NULL);
1615 if (EMPTYSTRING(file)) {
1617 goto cleanup_fetch_ftp;
1621 (void)strlcpy(rempath, dir, sizeof(rempath));
1622 (void)strlcat(rempath, "/", sizeof(rempath));
1623 (void)strlcat(rempath, file, sizeof(rempath));
1627 /* Fetch the file(s). */
1629 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf));
1633 if (dirhasglob || filehasglob) {
1636 ointeractive = interactive;
1638 if (restartautofetch)
1639 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf));
1641 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf));
1644 interactive = ointeractive;
1646 if (outfile == NULL) {
1647 cp = strrchr(file, '/'); /* find savefile */
1653 xargv[2] = (char *)outfile;
1656 if (restartautofetch)
1657 reget(xargc, xargv);
1662 if ((code / 100) == COMPLETE)
1671 memset(pass, 0, strlen(pass));
1677 * Retrieve the given file to outfile.
1678 * Supports arguments of the form:
1679 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1681 * "http://host/path" call fetch_url() to use HTTP
1682 * "file:///path" call fetch_url() to copy
1683 * "about:..." print a message
1685 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1686 * is still open (e.g, ftp xfer with trailing /)
1689 go_fetch(const char *url)
1698 if (STRNEQUAL(url, ABOUT_URL)) {
1699 url += sizeof(ABOUT_URL) -1;
1700 if (strcasecmp(url, "ftp") == 0 ||
1701 strcasecmp(url, "tnftp") == 0) {
1703 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1704 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1705 } else if (strcasecmp(url, "lukem") == 0) {
1707 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1708 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1709 } else if (strcasecmp(url, "netbsd") == 0) {
1711 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1712 "For more information, see http://www.NetBSD.org/\n", ttyout);
1713 } else if (strcasecmp(url, "version") == 0) {
1714 fprintf(ttyout, "Version: %s %s%s\n",
1715 FTP_PRODUCT, FTP_VERSION,
1723 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1725 fputs("\n", ttyout);
1731 * Check for file:// and http:// URLs.
1733 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1734 return (fetch_url(url, NULL, NULL, NULL));
1737 * If it contains "://" but does not begin with ftp://
1738 * or something that was already handled, then it's
1741 * If it contains ":" but not "://" then we assume the
1742 * part before the colon is a host name, not an URL scheme,
1743 * so we don't try to match that here.
1745 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL))
1746 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url);
1749 * Try FTP URL-style and host:file arguments next.
1750 * If ftpproxy is set with an FTP URL, use fetch_url()
1751 * Othewise, use fetch_ftp().
1753 proxyenv = getoptionvalue("ftp_proxy");
1754 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL))
1755 return (fetch_url(url, NULL, NULL, NULL));
1757 return (fetch_ftp(url));
1761 * Retrieve multiple files from the command line,
1762 * calling go_fetch() for each file.
1764 * If an ftp path has a trailing "/", the path will be cd-ed into and
1765 * the connection remains open, and the function will return -1
1766 * (to indicate the connection is alive).
1767 * If an error occurs the return value will be the offset+1 in
1768 * argv[] of the file that caused a problem (i.e, argv[x]
1770 * Otherwise, 0 is returned if all files retrieved successfully.
1773 auto_fetch(int argc, char *argv[])
1775 volatile int argpos, rval;
1779 if (sigsetjmp(toplevel, 1)) {
1781 disconnect(0, NULL);
1786 (void)xsignal(SIGINT, intr);
1787 (void)xsignal(SIGPIPE, lostpeer);
1790 * Loop through as long as there's files to fetch.
1792 for (; (rval == 0) && (argpos < argc); argpos++) {
1793 if (strchr(argv[argpos], ':') == NULL)
1797 anonftp = 2; /* Handle "automatic" transfers. */
1798 rval = go_fetch(argv[argpos]);
1799 if (outfile != NULL && strcmp(outfile, "-") != 0
1800 && outfile[0] != '|')
1806 if (connected && rval != -1)
1807 disconnect(0, NULL);
1813 * Upload multiple files from the command line.
1815 * If an error occurs the return value will be the offset+1 in
1816 * argv[] of the file that caused a problem (i.e, argv[x]
1818 * Otherwise, 0 is returned if all files uploaded successfully.
1821 auto_put(int argc, char **argv, const char *uploadserver)
1823 char *uargv[4], *path, *pathsep;
1824 int uargc, rval, argpos;
1826 char cmdbuf[MAX_C_NAME];
1828 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf));
1832 uargv[2] = uargv[3] = NULL;
1836 DPRINTF("auto_put: target `%s'\n", uploadserver);
1838 path = ftp_strdup(uploadserver);
1840 if (path[len - 1] != '/' && path[len - 1] != ':') {
1842 * make sure we always pass a directory to auto_fetch
1844 if (argc > 1) { /* more than one file to upload */
1845 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1847 path = (char *)ftp_malloc(len);
1848 (void)strlcpy(path, uploadserver, len);
1849 (void)strlcat(path, "/", len);
1850 } else { /* single file to upload */
1851 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf));
1853 pathsep = strrchr(path, '/');
1854 if (pathsep == NULL) {
1855 pathsep = strrchr(path, ':');
1856 if (pathsep == NULL) {
1857 warnx("Invalid URL `%s'", path);
1858 goto cleanup_auto_put;
1861 uargv[2] = ftp_strdup(pathsep);
1864 uargv[2] = ftp_strdup(pathsep + 1);
1869 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1870 path, STRorNULL(uargv[2]));
1872 /* connect and cwd */
1873 rval = auto_fetch(1, &path);
1875 goto cleanup_auto_put;
1879 /* target filename provided; upload 1 file */
1880 /* XXX : is this the best way? */
1884 if ((code / 100) != COMPLETE)
1886 } else { /* otherwise a target dir: upload all files to it */
1887 for(argpos = 0; argv[argpos] != NULL; argpos++) {
1888 uargv[1] = argv[argpos];
1890 if ((code / 100) != COMPLETE) {