1 /* $NetBSD: fetch.c,v 1.175 2007/04/17 05:52:03 lukem Exp $ */
4 * Copyright (c) 1997-2007 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.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the NetBSD
24 * Foundation, Inc. and its contributors.
25 * 4. Neither the name of The NetBSD Foundation nor the names of its
26 * contributors may be used to endorse or promote products derived
27 * from this software without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 * POSSIBILITY OF SUCH DAMAGE.
42 #include <sys/cdefs.h>
44 __RCSID("$NetBSD: fetch.c,v 1.175 2007/04/17 05:52:03 lukem Exp $");
48 * FTP User Program -- Command line file retrieval
51 #include <sys/types.h>
52 #include <sys/param.h>
53 #include <sys/socket.h>
57 #include <netinet/in.h>
60 #include <arpa/inet.h>
86 static int auth_url(const char *, char **, const char *, const char *);
87 static void base64_encode(const unsigned char *, size_t, unsigned char *);
89 static int go_fetch(const char *);
90 static int fetch_ftp(const char *);
91 static int fetch_url(const char *, const char *, char *, char *);
92 static const char *match_token(const char **, const char *);
93 static int parse_url(const char *, const char *, url_t *, char **,
94 char **, char **, char **, in_port_t *, char **);
95 static void url_decode(char *);
97 static int redirect_loop;
100 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0)
101 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
102 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0)
105 #define ABOUT_URL "about:" /* propaganda */
106 #define FILE_URL "file://" /* file URL prefix */
107 #define FTP_URL "ftp://" /* ftp URL prefix */
108 #define HTTP_URL "http://" /* http URL prefix */
112 * Determine if token is the next word in buf (case insensitive).
113 * If so, advance buf past the token and any trailing LWS, and
114 * return a pointer to the token (in buf). Otherwise, return NULL.
115 * token may be preceded by LWS.
116 * token must be followed by LWS or NUL. (I.e, don't partial match).
119 match_token(const char **buf, const char *token)
121 const char *p, *orig;
124 tlen = strlen(token);
128 if (strncasecmp(p, token, tlen) != 0)
131 if (*p != '\0' && !ISLWS(*p))
141 * Generate authorization response based on given authentication challenge.
142 * Returns -1 if an error occurred, otherwise 0.
143 * Sets response to a malloc(3)ed string; caller should free.
146 auth_url(const char *challenge, char **response, const char *guser,
149 const char *cp, *scheme, *errormsg;
150 char *ep, *clear, *realm;
151 char user[BUFSIZ], *pass;
153 size_t len, clen, rlen;
156 clear = realm = NULL;
159 scheme = "Basic"; /* only support Basic authentication */
161 DPRINTF("auth_url: challenge `%s'\n", challenge);
163 if (! match_token(&cp, scheme)) {
164 warnx("Unsupported authentication challenge `%s'",
166 goto cleanup_auth_url;
169 #define REALM "realm=\""
170 if (STRNEQUAL(cp, REALM))
171 cp += sizeof(REALM) - 1;
173 warnx("Unsupported authentication challenge `%s'",
175 goto cleanup_auth_url;
177 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
178 if ((ep = strchr(cp, '\"')) != NULL) {
179 size_t len = ep - cp;
181 realm = (char *)ftp_malloc(len + 1);
182 (void)strlcpy(realm, cp, len + 1);
184 warnx("Unsupported authentication challenge `%s'",
186 goto cleanup_auth_url;
189 fprintf(ttyout, "Username for `%s': ", realm);
191 (void)strlcpy(user, guser, sizeof(user));
192 fprintf(ttyout, "%s\n", user);
194 (void)fflush(ttyout);
195 if (getline(stdin, user, sizeof(user), &errormsg) < 0) {
196 warnx("%s; can't authenticate", errormsg);
197 goto cleanup_auth_url;
201 pass = (char *)gpass;
203 pass = getpass("Password: ");
205 warnx("Can't read password");
206 goto cleanup_auth_url;
210 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */
211 clear = (char *)ftp_malloc(clen);
212 (void)strlcpy(clear, user, clen);
213 (void)strlcat(clear, ":", clen);
214 (void)strlcat(clear, pass, clen);
216 memset(pass, 0, strlen(pass));
218 /* scheme + " " + enc + "\0" */
219 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
220 *response = (char *)ftp_malloc(rlen);
221 (void)strlcpy(*response, scheme, rlen);
222 len = strlcat(*response, " ", rlen);
223 /* use `clen - 1' to not encode the trailing NUL */
224 base64_encode((unsigned char *)clear, clen - 1,
225 (unsigned char *)*response + len);
226 memset(clear, 0, clen);
236 * Encode len bytes starting at clear using base64 encoding into encoded,
237 * which should be at least ((len + 2) * 4 / 3 + 1) in size.
240 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
242 static const unsigned char enc[] =
243 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
248 for (i = 0; i < len; i += 3) {
249 *(cp++) = enc[((clear[i + 0] >> 2))];
250 *(cp++) = enc[((clear[i + 0] << 4) & 0x30)
251 | ((clear[i + 1] >> 4) & 0x0f)];
252 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
253 | ((clear[i + 2] >> 6) & 0x03)];
254 *(cp++) = enc[((clear[i + 2] ) & 0x3f)];
263 * Decode %xx escapes in given string, `in-place'.
266 url_decode(char *url)
268 unsigned char *p, *q;
270 if (EMPTYSTRING(url))
272 p = q = (unsigned char *)url;
274 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
277 && p[1] && isxdigit((unsigned char)p[1])
278 && p[2] && isxdigit((unsigned char)p[2])) {
279 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
290 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
291 * Returns -1 if a parse error occurred, otherwise 0.
292 * It's the caller's responsibility to url_decode() the returned
293 * user, pass and path.
295 * Sets type to url_t, each of the given char ** pointers to a
296 * malloc(3)ed strings of the relevant section, and port to
297 * the number given, or ftpport if ftp://, or httpport if http://.
299 * If <host> is surrounded by `[' and ']', it's parsed as an
300 * IPv6 address (as per RFC 2732).
302 * XXX: this is not totally RFC 1738 compliant; <path> will have the
303 * leading `/' unless it's an ftp:// URL, as this makes things easier
304 * for file:// and http:// URLs. ftp:// URLs have the `/' between the
305 * host and the URL-path removed, but any additional leading slashes
306 * in the URL-path are retained (because they imply that we should
307 * later do "CWD" with a null argument).
310 * input URL output path
311 * --------- -----------
313 * "http://host/" NULL
314 * "file://host/dir/file" "dir/file"
316 * "ftp://host//" NULL
317 * "ftp://host//dir/file" "/dir/file"
320 parse_url(const char *url, const char *desc, url_t *type,
321 char **user, char **pass, char **host, char **port,
322 in_port_t *portnum, char **path)
325 char *cp, *ep, *thost, *tport;
328 if (url == NULL || desc == NULL || type == NULL || user == NULL
329 || pass == NULL || host == NULL || port == NULL || portnum == NULL
331 errx(1, "parse_url: invoked with NULL argument!");
334 *type = UNKNOWN_URL_T;
335 *user = *pass = *host = *port = *path = NULL;
339 if (STRNEQUAL(url, HTTP_URL)) {
340 url += sizeof(HTTP_URL) - 1;
342 *portnum = HTTP_PORT;
344 } else if (STRNEQUAL(url, FTP_URL)) {
345 url += sizeof(FTP_URL) - 1;
349 } else if (STRNEQUAL(url, FILE_URL)) {
350 url += sizeof(FILE_URL) - 1;
353 warnx("Invalid %s `%s'", desc, url);
357 memset(*pass, 0, strlen(*pass));
368 /* find [user[:pass]@]host[:port] */
369 ep = strchr(url, '/');
371 thost = ftp_strdup(url);
374 thost = (char *)ftp_malloc(len + 1);
375 (void)strlcpy(thost, url, len + 1);
376 if (*type == FTP_URL_T) /* skip first / for ftp URLs */
378 *path = ftp_strdup(ep);
381 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
383 if (*type == FTP_URL_T)
384 anonftp = 0; /* disable anonftp */
387 thost = ftp_strdup(cp + 1);
388 cp = strchr(*user, ':');
391 *pass = ftp_strdup(cp + 1);
400 * Check if thost is an encoded IPv6 address, as per
402 * `[' ipv6-address ']'
406 if ((ep = strchr(cp, ']')) == NULL ||
407 (ep[1] != '\0' && ep[1] != ':')) {
408 warnx("Invalid address `%s' in %s `%s'",
409 thost, desc, origurl);
410 goto cleanup_parse_url;
412 len = ep - cp; /* change `[xyz]' -> `xyz' */
413 memmove(thost, thost + 1, len);
415 if (! isipv6addr(thost)) {
416 warnx("Invalid IPv6 address `%s' in %s `%s'",
417 thost, desc, origurl);
418 goto cleanup_parse_url;
427 if ((cp = strchr(thost, ':')) != NULL)
431 /* look for [:port] */
435 nport = parseport(cp, -1);
437 warnx("Unknown port `%s' in %s `%s'",
439 goto cleanup_parse_url;
446 *port = ftp_strdup(tport);
448 *path = ftp_strdup("/");
450 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
452 *user ? *user : "<null>", *pass ? *pass : "<null>",
453 *host ? *host : "<null>", *port ? *port : "<null>",
454 *portnum ? *portnum : -1, *path ? *path : "<null>");
459 sigjmp_buf httpabort;
462 * Retrieve URL, via a proxy if necessary, using HTTP.
463 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
464 * http_proxy as appropriate.
465 * Supports HTTP redirects.
466 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
467 * is still open (e.g, ftp xfer with trailing /)
470 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
472 struct addrinfo hints, *res, *res0 = NULL;
474 char hbuf[NI_MAXHOST];
475 sigfunc volatile oldintr;
476 sigfunc volatile oldintp;
479 int volatile ischunked;
480 int volatile isproxy;
484 static size_t bufsize;
485 static char *xferbuf;
486 const char *cp, *token;
489 char *volatile savefile;
491 char *volatile location;
492 char *volatile message;
493 char *user, *pass, *host, *port, *path;
494 char *volatile decodedpath;
495 char *puser, *ppass, *useragent;
496 off_t hashbytes, rangestart, rangeend, entitylen;
497 int (*volatile closefunc)(FILE *);
504 oldintr = oldintp = NULL;
508 buf = savefile = NULL;
509 auth = location = message = NULL;
510 ischunked = isproxy = hcode = 0;
512 user = pass = host = path = decodedpath = puser = ppass = NULL;
514 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port,
515 &portnum, &path) == -1)
516 goto cleanup_fetch_url;
518 if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
519 && strcasecmp(host, "localhost") != 0) {
520 warnx("No support for non local file URL `%s'", url);
521 goto cleanup_fetch_url;
524 if (EMPTYSTRING(path)) {
525 if (urltype == FTP_URL_T) {
526 rval = fetch_ftp(url);
527 goto cleanup_fetch_url;
529 if (urltype != HTTP_URL_T || outfile == NULL) {
530 warnx("Invalid URL (no file after host) `%s'", url);
531 goto cleanup_fetch_url;
535 decodedpath = ftp_strdup(path);
536 url_decode(decodedpath);
539 savefile = ftp_strdup(outfile);
541 cp = strrchr(decodedpath, '/'); /* find savefile */
543 savefile = ftp_strdup(cp + 1);
545 savefile = ftp_strdup(decodedpath);
547 if (EMPTYSTRING(savefile)) {
548 if (urltype == FTP_URL_T) {
549 rval = fetch_ftp(url);
550 goto cleanup_fetch_url;
552 warnx("No file after directory (you must specify an "
553 "output file) `%s'", url);
554 goto cleanup_fetch_url;
556 DPRINTF("savefile `%s'\n", savefile);
561 rangestart = rangeend = entitylen = -1;
563 if (restartautofetch) {
564 if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
565 stat(savefile, &sb) == 0)
566 restart_point = sb.st_size;
568 if (urltype == FILE_URL_T) { /* file:// URLs */
569 direction = "copied";
570 fin = fopen(decodedpath, "r");
572 warn("Can't open `%s'", decodedpath);
573 goto cleanup_fetch_url;
575 if (fstat(fileno(fin), &sb) == 0) {
577 filesize = sb.st_size;
580 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
581 warn("Can't seek to restart `%s'",
583 goto cleanup_fetch_url;
587 fprintf(ttyout, "Copying %s", decodedpath);
589 fprintf(ttyout, " (restarting at " LLF ")",
593 } else { /* ftp:// or http:// URLs */
597 if (proxyenv == NULL) {
598 if (urltype == HTTP_URL_T)
599 proxyenv = getoptionvalue("http_proxy");
600 else if (urltype == FTP_URL_T)
601 proxyenv = getoptionvalue("ftp_proxy");
603 direction = "retrieved";
604 if (! EMPTYSTRING(proxyenv)) { /* use proxy */
607 char *pport, *no_proxy;
611 /* check URL against list of no_proxied sites */
612 no_proxy = getoptionvalue("no_proxy");
613 if (! EMPTYSTRING(no_proxy)) {
614 char *np, *np_copy, *np_iter;
618 np_iter = np_copy = ftp_strdup(no_proxy);
620 while ((cp = strsep(&np_iter, " ,")) != NULL) {
623 if ((np = strrchr(cp, ':')) != NULL) {
626 strtol(np + 1, &ep, 10);
629 if (np_port != portnum)
635 if (strncasecmp(host + hlen - plen,
642 if (isproxy == 0 && urltype == FTP_URL_T) {
643 rval = fetch_ftp(url);
644 goto cleanup_fetch_url;
649 if (parse_url(proxyenv, "proxy URL", &purltype,
650 &puser, &ppass, &phost, &pport, &portnum,
652 goto cleanup_fetch_url;
654 if ((purltype != HTTP_URL_T
655 && purltype != FTP_URL_T) ||
656 EMPTYSTRING(phost) ||
657 (! EMPTYSTRING(ppath)
658 && strcmp(ppath, "/") != 0)) {
659 warnx("Malformed proxy URL `%s'",
664 goto cleanup_fetch_url;
666 if (isipv6addr(host) &&
667 strchr(host, '%') != NULL) {
669 "Scoped address notation `%s' disallowed via web proxy",
674 goto cleanup_fetch_url;
682 path = ftp_strdup(url);
685 } /* ! EMPTYSTRING(proxyenv) */
687 memset(&hints, 0, sizeof(hints));
689 hints.ai_family = family;
690 hints.ai_socktype = SOCK_STREAM;
691 hints.ai_protocol = 0;
692 error = getaddrinfo(host, NULL, &hints, &res0);
694 warnx("Can't lookup `%s': %s", host,
695 (error == EAI_SYSTEM) ? strerror(errno)
696 : gai_strerror(error));
697 goto cleanup_fetch_url;
699 if (res0->ai_canonname)
700 host = res0->ai_canonname;
703 for (res = res0; res; res = res->ai_next) {
705 if (getnameinfo(res->ai_addr, res->ai_addrlen,
706 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
707 strlcpy(hbuf, "?", sizeof(hbuf));
709 if (verbose && res0->ai_next) {
710 fprintf(ttyout, "Trying %s...\n", hbuf);
713 ((struct sockaddr_in *)res->ai_addr)->sin_port =
715 s = socket(res->ai_family, SOCK_STREAM,
719 "Can't create socket for connection to `%s'",
724 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
735 warnx("Can't connect to `%s'", host);
736 goto cleanup_fetch_url;
739 fin = fdopen(s, "r+");
741 * Construct and send the request.
744 fprintf(ttyout, "Requesting %s\n", url);
749 fprintf(ttyout, "%svia %s:%s", leading,
754 fprintf(fin, "GET %s HTTP/1.0\r\n", path);
756 fprintf(fin, "Pragma: no-cache\r\n");
758 fprintf(fin, "GET %s HTTP/1.1\r\n", path);
759 if (strchr(host, ':')) {
763 * strip off IPv6 scope identifier, since it is
766 h = ftp_strdup(host);
768 (p = strchr(h, '%')) != NULL) {
771 fprintf(fin, "Host: [%s]", h);
774 fprintf(fin, "Host: %s", host);
775 if (portnum != HTTP_PORT)
776 fprintf(fin, ":%u", portnum);
777 fprintf(fin, "\r\n");
778 fprintf(fin, "Accept: */*\r\n");
779 fprintf(fin, "Connection: close\r\n");
781 fputs(leading, ttyout);
782 fprintf(fin, "Range: bytes=" LLF "-\r\n",
784 fprintf(ttyout, "restarting at " LLF,
790 fprintf(fin, "Cache-Control: no-cache\r\n");
792 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
793 fprintf(fin, "User-Agent: %s\r\n", useragent);
795 fprintf(fin, "User-Agent: %s/%s\r\n",
796 FTP_PRODUCT, FTP_VERSION);
800 fprintf(ttyout, "%swith authorization",
805 fprintf(fin, "Authorization: %s\r\n", wwwauth);
810 "%swith proxy authorization", leading);
814 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
816 if (verbose && hasleading)
817 fputs(")\n", ttyout);
818 fprintf(fin, "\r\n");
819 if (fflush(fin) == EOF) {
820 warn("Writing HTTP request");
821 goto cleanup_fetch_url;
824 /* Read the response */
825 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) {
826 warn("Receiving HTTP reply");
827 goto cleanup_fetch_url;
829 while (len > 0 && (ISLWS(buf[len-1])))
831 DPRINTF("received `%s'\n", buf);
833 /* Determine HTTP response code */
834 cp = strchr(buf, ' ');
839 hcode = strtol(cp, &ep, 10);
840 if (*ep != '\0' && !isspace((unsigned char)*ep))
842 message = ftp_strdup(cp);
844 /* Read the rest of the header. */
847 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0))
849 warn("Receiving HTTP reply");
850 goto cleanup_fetch_url;
852 while (len > 0 && (ISLWS(buf[len-1])))
856 DPRINTF("received `%s'\n", buf);
859 * Look for some headers
864 if (match_token(&cp, "Content-Length:")) {
865 filesize = STRTOLL(cp, &ep, 10);
866 if (filesize < 0 || *ep != '\0')
868 DPRINTF("parsed len as: " LLF "\n",
871 } else if (match_token(&cp, "Content-Range:")) {
872 if (! match_token(&cp, "bytes"))
878 rangestart = STRTOLL(cp, &ep, 10);
879 if (rangestart < 0 || *ep != '-')
882 rangeend = STRTOLL(cp, &ep, 10);
883 if (rangeend < 0 || rangeend < rangestart)
893 entitylen = STRTOLL(cp, &ep, 10);
903 fprintf(ttyout, "parsed range as: ");
904 if (rangestart == -1)
905 fprintf(ttyout, "*");
907 fprintf(ttyout, LLF "-" LLF,
910 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
913 if (! restart_point) {
915 "Received unexpected Content-Range header");
916 goto cleanup_fetch_url;
919 } else if (match_token(&cp, "Last-Modified:")) {
924 if ((t = strptime(cp,
925 "%a, %d %b %Y %H:%M:%S GMT",
929 "%a, %d-%b-%y %H:%M:%S GMT",
933 "%a, %b %d %H:%M:%S %Y",
935 parsed.tm_isdst = -1;
937 mtime = timegm(&parsed);
939 if (ftp_debug && mtime != -1) {
941 "parsed date as: %s",
947 } else if (match_token(&cp, "Location:")) {
948 location = ftp_strdup(cp);
949 DPRINTF("parsed location as `%s'\n", cp);
951 } else if (match_token(&cp, "Transfer-Encoding:")) {
952 if (match_token(&cp, "binary")) {
954 "Bogus transfer encoding `binary' (fetching anyway)");
957 if (! (token = match_token(&cp, "chunked"))) {
959 "Unsupported transfer encoding `%s'",
961 goto cleanup_fetch_url;
964 DPRINTF("using chunked encoding\n");
966 } else if (match_token(&cp, "Proxy-Authenticate:")
967 || match_token(&cp, "WWW-Authenticate:")) {
968 if (! (token = match_token(&cp, "Basic"))) {
970 "skipping unknown auth scheme `%s'\n",
975 auth = ftp_strdup(token);
976 DPRINTF("parsed auth as `%s'\n", cp);
980 /* finished parsing header */
987 if (! restart_point) {
988 warnx("Not expecting partial content header");
989 goto cleanup_fetch_url;
998 if (EMPTYSTRING(location)) {
1000 "No redirection Location provided by server");
1001 goto cleanup_fetch_url;
1003 if (redirect_loop++ > 5) {
1004 warnx("Too many redirections requested");
1005 goto cleanup_fetch_url;
1009 fprintf(ttyout, "Redirected via %s\n",
1011 rval = fetch_url(url, location,
1012 proxyauth, wwwauth);
1015 fprintf(ttyout, "Redirected to %s\n",
1017 rval = go_fetch(location);
1019 goto cleanup_fetch_url;
1025 char *auser, *apass;
1036 if (verbose || *authp == NULL ||
1037 auser == NULL || apass == NULL)
1038 fprintf(ttyout, "%s\n", message);
1039 if (EMPTYSTRING(auth)) {
1041 "No authentication challenge provided by server");
1042 goto cleanup_fetch_url;
1044 if (*authp != NULL) {
1048 "Authorization failed. Retry (y/n)? ");
1049 if (getline(stdin, reply, sizeof(reply), NULL)
1051 goto cleanup_fetch_url;
1053 if (tolower((unsigned char)reply[0]) != 'y')
1054 goto cleanup_fetch_url;
1058 if (auth_url(auth, authp, auser, apass) == 0) {
1059 rval = fetch_url(url, proxyenv,
1060 proxyauth, wwwauth);
1061 memset(*authp, 0, strlen(*authp));
1064 goto cleanup_fetch_url;
1069 warnx("Error retrieving file `%s'", message);
1071 warnx("Unknown error retrieving file");
1072 goto cleanup_fetch_url;
1074 } /* end of ftp:// or http:// specific setup */
1076 /* Open the output file. */
1077 if (strcmp(savefile, "-") == 0) {
1079 } else if (*savefile == '|') {
1080 oldintp = xsignal(SIGPIPE, SIG_IGN);
1081 fout = popen(savefile + 1, "w");
1083 warn("Can't execute `%s'", savefile + 1);
1084 goto cleanup_fetch_url;
1088 if ((rangeend != -1 && rangeend <= restart_point) ||
1089 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1092 fprintf(ttyout, "already done\n");
1094 goto cleanup_fetch_url;
1096 if (restart_point && rangestart != -1) {
1097 if (entitylen != -1)
1098 filesize = entitylen;
1099 if (rangestart != restart_point) {
1101 "Size of `%s' differs from save file `%s'",
1103 goto cleanup_fetch_url;
1105 fout = fopen(savefile, "a");
1107 fout = fopen(savefile, "w");
1109 warn("Can't open `%s'", savefile);
1110 goto cleanup_fetch_url;
1116 if (sigsetjmp(httpabort, 1))
1117 goto cleanup_fetch_url;
1118 (void)xsignal(SIGQUIT, psummary);
1119 oldintr = xsignal(SIGINT, aborthttp);
1121 if (rcvbuf_size > bufsize) {
1123 (void)free(xferbuf);
1124 bufsize = rcvbuf_size;
1125 xferbuf = ftp_malloc(bufsize);
1132 /* Finally, suck down the file. */
1137 /* read chunksize */
1139 if (fgets(xferbuf, bufsize, fin) == NULL) {
1140 warnx("Unexpected EOF reading chunksize");
1141 goto cleanup_fetch_url;
1143 chunksize = strtol(xferbuf, &ep, 16);
1146 * XXX: Work around bug in Apache 1.3.9 and
1147 * 1.3.11, which incorrectly put trailing
1148 * space after the chunksize.
1153 if (strcmp(ep, "\r\n") != 0) {
1154 warnx("Unexpected data following chunksize");
1155 goto cleanup_fetch_url;
1157 DPRINTF("got chunksize of " LLF "\n", (LLT)chunksize);
1161 /* transfer file or chunk */
1163 struct timeval then, now, td;
1167 (void)gettimeofday(&then, NULL);
1168 bufrem = rate_get ? rate_get : bufsize;
1170 bufrem = MIN(chunksize, bufrem);
1171 while (bufrem > 0) {
1172 len = fread(xferbuf, sizeof(char),
1173 MIN(bufsize, bufrem), fin);
1178 if (fwrite(xferbuf, sizeof(char), len, fout)
1180 warn("Writing `%s'", savefile);
1181 goto cleanup_fetch_url;
1183 if (hash && !progress) {
1184 while (bytes >= hashbytes) {
1185 (void)putc('#', ttyout);
1188 (void)fflush(ttyout);
1198 (void)gettimeofday(&now, NULL);
1199 timersub(&now, &then, &td);
1202 usleep(1000000 - td.tv_usec);
1205 if (ischunked && chunksize <= 0)
1208 /* read CRLF after chunk*/
1211 if (fgets(xferbuf, bufsize, fin) == NULL)
1213 if (strcmp(xferbuf, "\r\n") != 0) {
1214 warnx("Unexpected data following chunk");
1215 goto cleanup_fetch_url;
1218 } while (ischunked);
1219 if (hash && !progress && bytes > 0) {
1221 (void)putc('#', ttyout);
1222 (void)putc('\n', ttyout);
1225 warn("Reading file");
1226 goto cleanup_fetch_url;
1230 if (closefunc == fclose && mtime != -1) {
1231 struct timeval tval[2];
1233 (void)gettimeofday(&tval[0], NULL);
1234 tval[1].tv_sec = mtime;
1235 tval[1].tv_usec = 0;
1239 if (utimes(savefile, tval) == -1) {
1241 "Can't change modification time to %s",
1242 asctime(localtime(&mtime)));
1250 goto cleanup_fetch_url;
1253 warnx("Improper response from `%s'", host);
1257 (void)xsignal(SIGINT, oldintr);
1259 (void)xsignal(SIGPIPE, oldintp);
1264 if (closefunc != NULL && fout != NULL)
1271 memset(pass, 0, strlen(pass));
1276 FREEPTR(decodedpath);
1279 memset(ppass, 0, strlen(ppass));
1289 * Abort a HTTP retrieval
1292 aborthttp(int notused)
1299 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1300 write(fileno(ttyout), msgbuf, len);
1301 siglongjmp(httpabort, 1);
1305 * Retrieve ftp URL or classic ftp argument using FTP.
1306 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1307 * is still open (e.g, ftp xfer with trailing /)
1310 fetch_ftp(const char *url)
1312 char *cp, *xargv[5], rempath[MAXPATHLEN];
1313 char *host, *path, *dir, *file, *user, *pass;
1315 int dirhasglob, filehasglob, rval, type, xargc;
1316 int oanonftp, oautologin;
1320 host = path = dir = file = user = pass = NULL;
1325 if (STRNEQUAL(url, FTP_URL)) {
1326 if ((parse_url(url, "URL", &urltype, &user, &pass,
1327 &host, &port, &portnum, &path) == -1) ||
1328 (user != NULL && *user == '\0') ||
1329 EMPTYSTRING(host)) {
1330 warnx("Invalid URL `%s'", url);
1331 goto cleanup_fetch_ftp;
1334 * Note: Don't url_decode(path) here. We need to keep the
1335 * distinction between "/" and "%2F" until later.
1338 /* check for trailing ';type=[aid]' */
1339 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1340 if (strcasecmp(cp, ";type=a") == 0)
1342 else if (strcasecmp(cp, ";type=i") == 0)
1344 else if (strcasecmp(cp, ";type=d") == 0) {
1346 "Directory listing via a URL is not supported");
1347 goto cleanup_fetch_ftp;
1349 warnx("Invalid suffix `%s' in URL `%s'", cp,
1351 goto cleanup_fetch_ftp;
1355 } else { /* classic style `[user@]host:[file]' */
1356 urltype = CLASSIC_URL_T;
1357 host = ftp_strdup(url);
1358 cp = strchr(host, '@');
1362 anonftp = 0; /* disable anonftp */
1363 host = ftp_strdup(cp + 1);
1365 cp = strchr(host, ':');
1368 path = ftp_strdup(cp + 1);
1371 if (EMPTYSTRING(host))
1372 goto cleanup_fetch_ftp;
1374 /* Extract the file and (if present) directory name. */
1376 if (! EMPTYSTRING(dir)) {
1378 * If we are dealing with classic `[user@]host:[path]' syntax,
1379 * then a path of the form `/file' (resulting from input of the
1380 * form `host:/file') means that we should do "CWD /" before
1381 * retrieving the file. So we set dir="/" and file="file".
1383 * But if we are dealing with URLs like `ftp://host/path' then
1384 * a path of the form `/file' (resulting from a URL of the form
1385 * `ftp://host//file') means that we should do `CWD ' (with an
1386 * empty argument) before retrieving the file. So we set
1387 * dir="" and file="file".
1389 * If the path does not contain / at all, we set dir=NULL.
1390 * (We get a path without any slashes if we are dealing with
1391 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1393 * In all other cases, we set dir to a string that does not
1394 * include the final '/' that separates the dir part from the
1395 * file part of the path. (This will be the empty string if
1396 * and only if we are dealing with a path of the form `/file'
1397 * resulting from an URL of the form `ftp://host//file'.)
1399 cp = strrchr(dir, '/');
1400 if (cp == dir && urltype == CLASSIC_URL_T) {
1403 } else if (cp != NULL) {
1412 if (urltype == FTP_URL_T && file != NULL) {
1414 /* but still don't url_decode(dir) */
1416 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1417 "path `%s' dir `%s' file `%s'\n",
1418 user ? user : "<null>", pass ? pass : "<null>",
1419 host ? host : "<null>", port ? port : "<null>",
1420 path ? path : "<null>",
1421 dir ? dir : "<null>", file ? file : "<null>");
1423 dirhasglob = filehasglob = 0;
1424 if (doglob && urltype == CLASSIC_URL_T) {
1425 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1427 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1431 /* Set up the connection */
1434 disconnect(0, NULL);
1436 xargv[0] = (char *)getprogname(); /* XXX discards const */
1445 oautologin = autologin;
1446 /* don't autologin in setpeer(), use ftp_login() below */
1448 setpeer(xargc, xargv);
1449 autologin = oautologin;
1450 if ((connected == 0) ||
1451 (connected == 1 && !ftp_login(host, user, pass))) {
1452 warnx("Can't connect or login to host `%s'", host);
1453 goto cleanup_fetch_ftp;
1461 setbinary(1, xargv);
1464 errx(1, "fetch_ftp: unknown transfer type %d", type);
1468 * Change directories, if necessary.
1470 * Note: don't use EMPTYSTRING(dir) below, because
1471 * dir=="" means something different from dir==NULL.
1473 if (dir != NULL && !dirhasglob) {
1477 * If we are dealing with a classic `[user@]host:[path]'
1478 * (urltype is CLASSIC_URL_T) then we have a raw directory
1479 * name (not encoded in any way) and we can change
1480 * directories in one step.
1482 * If we are dealing with an `ftp://host/path' URL
1483 * (urltype is FTP_URL_T), then RFC 1738 says we need to
1484 * send a separate CWD command for each unescaped "/"
1485 * in the path, and we have to interpret %hex escaping
1486 * *after* we find the slashes. It's possible to get
1487 * empty components here, (from multiple adjacent
1488 * slashes in the path) and RFC 1738 says that we should
1489 * still do `CWD ' (with a null argument) in such cases.
1491 * Many ftp servers don't support `CWD ', so if there's an
1492 * error performing that command, bail out with a descriptive
1497 * host: dir="", urltype=CLASSIC_URL_T
1498 * logged in (to default directory)
1499 * host:file dir=NULL, urltype=CLASSIC_URL_T
1501 * host:dir/ dir="dir", urltype=CLASSIC_URL_T
1502 * "CWD dir", logged in
1503 * ftp://host/ dir="", urltype=FTP_URL_T
1504 * logged in (to default directory)
1505 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
1506 * "CWD dir", logged in
1507 * ftp://host/file dir=NULL, urltype=FTP_URL_T
1509 * ftp://host//file dir="", urltype=FTP_URL_T
1510 * "CWD ", "RETR file"
1511 * host:/file dir="/", urltype=CLASSIC_URL_T
1512 * "CWD /", "RETR file"
1513 * ftp://host///file dir="/", urltype=FTP_URL_T
1514 * "CWD ", "CWD ", "RETR file"
1515 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
1516 * "CWD /", "RETR file"
1517 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
1518 * "CWD foo", "RETR file"
1519 * ftp://host/foo/bar/file dir="foo/bar"
1520 * "CWD foo", "CWD bar", "RETR file"
1521 * ftp://host//foo/bar/file dir="/foo/bar"
1522 * "CWD ", "CWD foo", "CWD bar", "RETR file"
1523 * ftp://host/foo//bar/file dir="foo//bar"
1524 * "CWD foo", "CWD ", "CWD bar", "RETR file"
1525 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
1526 * "CWD /", "CWD foo", "CWD bar", "RETR file"
1527 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
1528 * "CWD /foo", "CWD bar", "RETR file"
1529 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
1530 * "CWD /foo/bar", "RETR file"
1531 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
1532 * "RETR /foo/bar/file"
1534 * Note that we don't need `dir' after this point.
1537 if (urltype == FTP_URL_T) {
1538 nextpart = strchr(dir, '/');
1546 DPRINTF("dir `%s', nextpart `%s'\n",
1547 dir ? dir : "<null>",
1548 nextpart ? nextpart : "<null>");
1549 if (urltype == FTP_URL_T || *dir != '\0') {
1556 if (*dir == '\0' && code == 500)
1559 "ftp: The `CWD ' command (without a directory), which is required by\n"
1560 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n"
1561 " conflicts with the server's conformance to RFC 959.\n"
1562 " Try the same URL without the `//' in the URL pathname.\n"
1564 goto cleanup_fetch_ftp;
1568 } while (dir != NULL);
1571 if (EMPTYSTRING(file)) {
1573 goto cleanup_fetch_ftp;
1577 (void)strlcpy(rempath, dir, sizeof(rempath));
1578 (void)strlcat(rempath, "/", sizeof(rempath));
1579 (void)strlcat(rempath, file, sizeof(rempath));
1583 /* Fetch the file(s). */
1588 if (dirhasglob || filehasglob) {
1591 ointeractive = interactive;
1593 if (restartautofetch)
1594 xargv[0] = "mreget";
1598 interactive = ointeractive;
1600 if (outfile == NULL) {
1601 cp = strrchr(file, '/'); /* find savefile */
1607 xargv[2] = (char *)outfile;
1610 if (restartautofetch)
1611 reget(xargc, xargv);
1616 if ((code / 100) == COMPLETE)
1625 memset(pass, 0, strlen(pass));
1631 * Retrieve the given file to outfile.
1632 * Supports arguments of the form:
1633 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1635 * "http://host/path" call fetch_url() to use HTTP
1636 * "file:///path" call fetch_url() to copy
1637 * "about:..." print a message
1639 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1640 * is still open (e.g, ftp xfer with trailing /)
1643 go_fetch(const char *url)
1651 if (STRNEQUAL(url, ABOUT_URL)) {
1652 url += sizeof(ABOUT_URL) -1;
1653 if (strcasecmp(url, "ftp") == 0 ||
1654 strcasecmp(url, "tnftp") == 0) {
1656 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1657 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1658 } else if (strcasecmp(url, "lukem") == 0) {
1660 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1661 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1662 } else if (strcasecmp(url, "netbsd") == 0) {
1664 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1665 "For more information, see http://www.NetBSD.org/\n", ttyout);
1666 } else if (strcasecmp(url, "version") == 0) {
1667 fprintf(ttyout, "Version: %s %s%s\n",
1668 FTP_PRODUCT, FTP_VERSION,
1676 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1678 fputs("\n", ttyout);
1684 * Check for file:// and http:// URLs.
1686 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1687 return (fetch_url(url, NULL, NULL, NULL));
1690 * Try FTP URL-style and host:file arguments next.
1691 * If ftpproxy is set with an FTP URL, use fetch_url()
1692 * Othewise, use fetch_ftp().
1694 proxy = getoptionvalue("ftp_proxy");
1695 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL))
1696 return (fetch_url(url, NULL, NULL, NULL));
1698 return (fetch_ftp(url));
1702 * Retrieve multiple files from the command line,
1703 * calling go_fetch() for each file.
1705 * If an ftp path has a trailing "/", the path will be cd-ed into and
1706 * the connection remains open, and the function will return -1
1707 * (to indicate the connection is alive).
1708 * If an error occurs the return value will be the offset+1 in
1709 * argv[] of the file that caused a problem (i.e, argv[x]
1711 * Otherwise, 0 is returned if all files retrieved successfully.
1714 auto_fetch(int argc, char *argv[])
1716 volatile int argpos, rval;
1720 if (sigsetjmp(toplevel, 1)) {
1722 disconnect(0, NULL);
1727 (void)xsignal(SIGINT, intr);
1728 (void)xsignal(SIGPIPE, lostpeer);
1731 * Loop through as long as there's files to fetch.
1733 for (; (rval == 0) && (argpos < argc); argpos++) {
1734 if (strchr(argv[argpos], ':') == NULL)
1738 anonftp = 2; /* Handle "automatic" transfers. */
1739 rval = go_fetch(argv[argpos]);
1740 if (outfile != NULL && strcmp(outfile, "-") != 0
1741 && outfile[0] != '|')
1747 if (connected && rval != -1)
1748 disconnect(0, NULL);
1754 * Upload multiple files from the command line.
1756 * If an error occurs the return value will be the offset+1 in
1757 * argv[] of the file that caused a problem (i.e, argv[x]
1759 * Otherwise, 0 is returned if all files uploaded successfully.
1762 auto_put(int argc, char **argv, const char *uploadserver)
1764 char *uargv[4], *path, *pathsep;
1765 int uargc, rval, argpos;
1769 uargv[uargc++] = "mput";
1770 uargv[uargc++] = argv[0];
1771 uargv[2] = uargv[3] = NULL;
1775 DPRINTF("auto_put: target `%s'\n", uploadserver);
1777 path = ftp_strdup(uploadserver);
1779 if (path[len - 1] != '/' && path[len - 1] != ':') {
1781 * make sure we always pass a directory to auto_fetch
1783 if (argc > 1) { /* more than one file to upload */
1784 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1786 path = (char *)ftp_malloc(len);
1787 (void)strlcpy(path, uploadserver, len);
1788 (void)strlcat(path, "/", len);
1789 } else { /* single file to upload */
1791 pathsep = strrchr(path, '/');
1792 if (pathsep == NULL) {
1793 pathsep = strrchr(path, ':');
1794 if (pathsep == NULL) {
1795 warnx("Invalid URL `%s'", path);
1796 goto cleanup_auto_put;
1799 uargv[2] = ftp_strdup(pathsep);
1802 uargv[2] = ftp_strdup(pathsep + 1);
1807 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1808 path, uargv[2] ? uargv[2] : "<null>");
1810 /* connect and cwd */
1811 rval = auto_fetch(1, &path);
1813 goto cleanup_auto_put;
1817 /* target filename provided; upload 1 file */
1818 /* XXX : is this the best way? */
1822 if ((code / 100) != COMPLETE)
1824 } else { /* otherwise a target dir: upload all files to it */
1825 for(argpos = 0; argv[argpos] != NULL; argpos++) {
1826 uargv[1] = argv[argpos];
1828 if ((code / 100) != COMPLETE) {