1 /* $NetBSD: fetch.c,v 1.183 2007/12/05 03:46:33 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 1.183 2007/12/05 03:46:33 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]);
289 * Parse URL of form (per RFC3986):
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 * XXX: this is not totally RFC3986 compliant; <path> will have the
300 * leading `/' unless it's an ftp:// URL, as this makes things easier
301 * for file:// and http:// URLs. ftp:// URLs have the `/' between the
302 * host and the URL-path removed, but any additional leading slashes
303 * in the URL-path are retained (because they imply that we should
304 * later do "CWD" with a null argument).
307 * input URL output path
308 * --------- -----------
311 * "http://host/path" "/path"
312 * "file://host/dir/file" "dir/file"
316 * "ftp://host/dir/file" "dir/file"
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!");
332 DPRINTF("parse_url: %s `%s'\n", desc, url);
335 *type = UNKNOWN_URL_T;
336 *user = *pass = *host = *port = *path = NULL;
340 if (STRNEQUAL(url, HTTP_URL)) {
341 url += sizeof(HTTP_URL) - 1;
343 *portnum = HTTP_PORT;
345 } else if (STRNEQUAL(url, FTP_URL)) {
346 url += sizeof(FTP_URL) - 1;
350 } else if (STRNEQUAL(url, FILE_URL)) {
351 url += sizeof(FILE_URL) - 1;
354 warnx("Invalid %s `%s'", desc, url);
358 memset(*pass, 0, strlen(*pass));
369 /* find [user[:pass]@]host[:port] */
370 ep = strchr(url, '/');
372 thost = ftp_strdup(url);
375 thost = (char *)ftp_malloc(len + 1);
376 (void)strlcpy(thost, url, len + 1);
377 if (*type == FTP_URL_T) /* skip first / for ftp URLs */
379 *path = ftp_strdup(ep);
382 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
384 if (*type == FTP_URL_T)
385 anonftp = 0; /* disable anonftp */
388 thost = ftp_strdup(cp + 1);
389 cp = strchr(*user, ':');
392 *pass = ftp_strdup(cp + 1);
401 * Check if thost is an encoded IPv6 address, as per
403 * `[' ipv6-address ']'
407 if ((ep = strchr(cp, ']')) == NULL ||
408 (ep[1] != '\0' && ep[1] != ':')) {
409 warnx("Invalid address `%s' in %s `%s'",
410 thost, desc, origurl);
411 goto cleanup_parse_url;
413 len = ep - cp; /* change `[xyz]' -> `xyz' */
414 memmove(thost, thost + 1, len);
416 if (! isipv6addr(thost)) {
417 warnx("Invalid IPv6 address `%s' in %s `%s'",
418 thost, desc, origurl);
419 goto cleanup_parse_url;
428 if ((cp = strchr(thost, ':')) != NULL)
432 /* look for [:port] */
436 nport = parseport(cp, -1);
438 warnx("Unknown port `%s' in %s `%s'",
440 goto cleanup_parse_url;
447 *port = ftp_strdup(tport);
449 const char *emptypath = "/";
450 if (*type == FTP_URL_T) /* skip first / for ftp URLs */
452 *path = ftp_strdup(emptypath);
455 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
457 STRorNULL(*user), STRorNULL(*pass),
458 STRorNULL(*host), STRorNULL(*port),
459 *portnum ? *portnum : -1, STRorNULL(*path));
464 sigjmp_buf httpabort;
467 * Retrieve URL, via a proxy if necessary, using HTTP.
468 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
469 * http_proxy as appropriate.
470 * Supports HTTP redirects.
471 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
472 * is still open (e.g, ftp xfer with trailing /)
475 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
477 struct addrinfo hints, *res, *res0 = NULL;
479 char hbuf[NI_MAXHOST];
480 sigfunc volatile oldintr;
481 sigfunc volatile oldintp;
484 int volatile ischunked;
485 int volatile isproxy;
489 static size_t bufsize;
490 static char *xferbuf;
491 const char *cp, *token;
494 const char *errormsg;
495 char *volatile savefile;
497 char *volatile location;
498 char *volatile message;
499 char *user, *pass, *host, *port, *path;
500 char *volatile decodedpath;
501 char *puser, *ppass, *useragent;
502 off_t hashbytes, rangestart, rangeend, entitylen;
503 int (*volatile closefunc)(FILE *);
510 DPRINTF("fetch_url: `%s' proxyenv `%s'\n", url, STRorNULL(proxyenv));
512 oldintr = oldintp = NULL;
517 auth = location = message = NULL;
518 ischunked = isproxy = hcode = 0;
520 user = pass = host = path = decodedpath = puser = ppass = NULL;
522 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port,
523 &portnum, &path) == -1)
524 goto cleanup_fetch_url;
526 if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
527 && strcasecmp(host, "localhost") != 0) {
528 warnx("No support for non local file URL `%s'", url);
529 goto cleanup_fetch_url;
532 if (EMPTYSTRING(path)) {
533 if (urltype == FTP_URL_T) {
534 rval = fetch_ftp(url);
535 goto cleanup_fetch_url;
537 if (urltype != HTTP_URL_T || outfile == NULL) {
538 warnx("Invalid URL (no file after host) `%s'", url);
539 goto cleanup_fetch_url;
543 decodedpath = ftp_strdup(path);
544 url_decode(decodedpath);
547 savefile = ftp_strdup(outfile);
549 cp = strrchr(decodedpath, '/'); /* find savefile */
551 savefile = ftp_strdup(cp + 1);
553 savefile = ftp_strdup(decodedpath);
555 DPRINTF("fetch_url: savefile `%s'\n", savefile);
556 if (EMPTYSTRING(savefile)) {
557 if (urltype == FTP_URL_T) {
558 rval = fetch_ftp(url);
559 goto cleanup_fetch_url;
561 warnx("No file after directory (you must specify an "
562 "output file) `%s'", url);
563 goto cleanup_fetch_url;
568 rangestart = rangeend = entitylen = -1;
570 if (restartautofetch) {
571 if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
572 stat(savefile, &sb) == 0)
573 restart_point = sb.st_size;
575 if (urltype == FILE_URL_T) { /* file:// URLs */
576 direction = "copied";
577 fin = fopen(decodedpath, "r");
579 warn("Can't open `%s'", decodedpath);
580 goto cleanup_fetch_url;
582 if (fstat(fileno(fin), &sb) == 0) {
584 filesize = sb.st_size;
587 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
588 warn("Can't seek to restart `%s'",
590 goto cleanup_fetch_url;
594 fprintf(ttyout, "Copying %s", decodedpath);
596 fprintf(ttyout, " (restarting at " LLF ")",
600 } else { /* ftp:// or http:// URLs */
604 if (proxyenv == NULL) {
605 if (urltype == HTTP_URL_T)
606 proxyenv = getoptionvalue("http_proxy");
607 else if (urltype == FTP_URL_T)
608 proxyenv = getoptionvalue("ftp_proxy");
610 direction = "retrieved";
611 if (! EMPTYSTRING(proxyenv)) { /* use proxy */
614 char *pport, *no_proxy;
618 /* check URL against list of no_proxied sites */
619 no_proxy = getoptionvalue("no_proxy");
620 if (! EMPTYSTRING(no_proxy)) {
621 char *np, *np_copy, *np_iter;
625 np_iter = np_copy = ftp_strdup(no_proxy);
627 while ((cp = strsep(&np_iter, " ,")) != NULL) {
630 if ((np = strrchr(cp, ':')) != NULL) {
633 strtol(np + 1, &ep, 10);
636 if (np_port != portnum)
642 if (strncasecmp(host + hlen - plen,
649 if (isproxy == 0 && urltype == FTP_URL_T) {
650 rval = fetch_ftp(url);
651 goto cleanup_fetch_url;
657 warnx("Can't restart via proxy URL `%s'",
659 goto cleanup_fetch_url;
661 if (parse_url(proxyenv, "proxy URL", &purltype,
662 &puser, &ppass, &phost, &pport, &portnum,
664 goto cleanup_fetch_url;
666 if ((purltype != HTTP_URL_T
667 && purltype != FTP_URL_T) ||
668 EMPTYSTRING(phost) ||
669 (! EMPTYSTRING(ppath)
670 && strcmp(ppath, "/") != 0)) {
671 warnx("Malformed proxy URL `%s'",
676 goto cleanup_fetch_url;
678 if (isipv6addr(host) &&
679 strchr(host, '%') != NULL) {
681 "Scoped address notation `%s' disallowed via web proxy",
686 goto cleanup_fetch_url;
694 path = ftp_strdup(url);
697 } /* ! EMPTYSTRING(proxyenv) */
699 memset(&hints, 0, sizeof(hints));
701 hints.ai_family = family;
702 hints.ai_socktype = SOCK_STREAM;
703 hints.ai_protocol = 0;
704 error = getaddrinfo(host, NULL, &hints, &res0);
706 warnx("Can't lookup `%s': %s", host,
707 (error == EAI_SYSTEM) ? strerror(errno)
708 : gai_strerror(error));
709 goto cleanup_fetch_url;
711 if (res0->ai_canonname)
712 host = res0->ai_canonname;
715 for (res = res0; res; res = res->ai_next) {
717 if (getnameinfo(res->ai_addr, res->ai_addrlen,
718 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
719 strlcpy(hbuf, "?", sizeof(hbuf));
721 if (verbose && res0->ai_next) {
722 fprintf(ttyout, "Trying %s...\n", hbuf);
725 ((struct sockaddr_in *)res->ai_addr)->sin_port =
727 s = socket(res->ai_family, SOCK_STREAM,
731 "Can't create socket for connection to `%s'",
736 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
747 warnx("Can't connect to `%s'", host);
748 goto cleanup_fetch_url;
751 fin = fdopen(s, "r+");
753 * Construct and send the request.
756 fprintf(ttyout, "Requesting %s\n", url);
761 fprintf(ttyout, "%svia %s:%s", leading,
766 fprintf(fin, "GET %s HTTP/1.0\r\n", path);
768 fprintf(fin, "Pragma: no-cache\r\n");
770 fprintf(fin, "GET %s HTTP/1.1\r\n", path);
771 if (strchr(host, ':')) {
775 * strip off IPv6 scope identifier, since it is
778 h = ftp_strdup(host);
780 (p = strchr(h, '%')) != NULL) {
783 fprintf(fin, "Host: [%s]", h);
786 fprintf(fin, "Host: %s", host);
787 if (portnum != HTTP_PORT)
788 fprintf(fin, ":%u", portnum);
789 fprintf(fin, "\r\n");
790 fprintf(fin, "Accept: */*\r\n");
791 fprintf(fin, "Connection: close\r\n");
793 fputs(leading, ttyout);
794 fprintf(fin, "Range: bytes=" LLF "-\r\n",
796 fprintf(ttyout, "restarting at " LLF,
802 fprintf(fin, "Cache-Control: no-cache\r\n");
804 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
805 fprintf(fin, "User-Agent: %s\r\n", useragent);
807 fprintf(fin, "User-Agent: %s/%s\r\n",
808 FTP_PRODUCT, FTP_VERSION);
812 fprintf(ttyout, "%swith authorization",
817 fprintf(fin, "Authorization: %s\r\n", wwwauth);
822 "%swith proxy authorization", leading);
826 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
828 if (verbose && hasleading)
829 fputs(")\n", ttyout);
830 fprintf(fin, "\r\n");
831 if (fflush(fin) == EOF) {
832 warn("Writing HTTP request");
833 goto cleanup_fetch_url;
836 /* Read the response */
837 len = getline(fin, buf, sizeof(buf), &errormsg);
839 if (*errormsg == '\n')
841 warnx("Receiving HTTP reply: %s", errormsg);
842 goto cleanup_fetch_url;
844 while (len > 0 && (ISLWS(buf[len-1])))
846 DPRINTF("fetch_url: received `%s'\n", buf);
848 /* Determine HTTP response code */
849 cp = strchr(buf, ' ');
854 hcode = strtol(cp, &ep, 10);
855 if (*ep != '\0' && !isspace((unsigned char)*ep))
857 message = ftp_strdup(cp);
859 /* Read the rest of the header. */
861 len = getline(fin, buf, sizeof(buf), &errormsg);
863 if (*errormsg == '\n')
865 warnx("Receiving HTTP reply: %s", errormsg);
866 goto cleanup_fetch_url;
868 while (len > 0 && (ISLWS(buf[len-1])))
872 DPRINTF("fetch_url: received `%s'\n", buf);
875 * Look for some headers
880 if (match_token(&cp, "Content-Length:")) {
881 filesize = STRTOLL(cp, &ep, 10);
882 if (filesize < 0 || *ep != '\0')
884 DPRINTF("fetch_url: parsed len as: " LLF "\n",
887 } else if (match_token(&cp, "Content-Range:")) {
888 if (! match_token(&cp, "bytes"))
894 rangestart = STRTOLL(cp, &ep, 10);
895 if (rangestart < 0 || *ep != '-')
898 rangeend = STRTOLL(cp, &ep, 10);
899 if (rangeend < 0 || rangeend < rangestart)
909 entitylen = STRTOLL(cp, &ep, 10);
919 fprintf(ttyout, "parsed range as: ");
920 if (rangestart == -1)
921 fprintf(ttyout, "*");
923 fprintf(ttyout, LLF "-" LLF,
926 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
929 if (! restart_point) {
931 "Received unexpected Content-Range header");
932 goto cleanup_fetch_url;
935 } else if (match_token(&cp, "Last-Modified:")) {
939 memset(&parsed, 0, sizeof(parsed));
941 if ((t = strptime(cp,
942 "%a, %d %b %Y %H:%M:%S GMT",
946 "%a, %d-%b-%y %H:%M:%S GMT",
950 "%a, %b %d %H:%M:%S %Y",
952 parsed.tm_isdst = -1;
954 mtime = timegm(&parsed);
956 if (ftp_debug && mtime != -1) {
958 "parsed date as: %s",
959 rfc2822time(localtime(&mtime)));
964 } else if (match_token(&cp, "Location:")) {
965 location = ftp_strdup(cp);
966 DPRINTF("fetch_url: parsed location as `%s'\n",
969 } else if (match_token(&cp, "Transfer-Encoding:")) {
970 if (match_token(&cp, "binary")) {
972 "Bogus transfer encoding `binary' (fetching anyway)");
975 if (! (token = match_token(&cp, "chunked"))) {
977 "Unsupported transfer encoding `%s'",
979 goto cleanup_fetch_url;
982 DPRINTF("fetch_url: using chunked encoding\n");
984 } else if (match_token(&cp, "Proxy-Authenticate:")
985 || match_token(&cp, "WWW-Authenticate:")) {
986 if (! (token = match_token(&cp, "Basic"))) {
988 "fetch_url: skipping unknown auth scheme `%s'\n",
993 auth = ftp_strdup(token);
994 DPRINTF("fetch_url: parsed auth as `%s'\n", cp);
998 /* finished parsing header */
1004 if (! restart_point) {
1005 warnx("Not expecting partial content header");
1006 goto cleanup_fetch_url;
1015 if (EMPTYSTRING(location)) {
1017 "No redirection Location provided by server");
1018 goto cleanup_fetch_url;
1020 if (redirect_loop++ > 5) {
1021 warnx("Too many redirections requested");
1022 goto cleanup_fetch_url;
1026 fprintf(ttyout, "Redirected via %s\n",
1028 rval = fetch_url(url, location,
1029 proxyauth, wwwauth);
1032 fprintf(ttyout, "Redirected to %s\n",
1034 rval = go_fetch(location);
1036 goto cleanup_fetch_url;
1042 char *auser, *apass;
1053 if (verbose || *authp == NULL ||
1054 auser == NULL || apass == NULL)
1055 fprintf(ttyout, "%s\n", message);
1056 if (EMPTYSTRING(auth)) {
1058 "No authentication challenge provided by server");
1059 goto cleanup_fetch_url;
1061 if (*authp != NULL) {
1065 "Authorization failed. Retry (y/n)? ");
1066 if (getline(stdin, reply, sizeof(reply), NULL)
1068 goto cleanup_fetch_url;
1070 if (tolower((unsigned char)reply[0]) != 'y')
1071 goto cleanup_fetch_url;
1075 if (auth_url(auth, authp, auser, apass) == 0) {
1076 rval = fetch_url(url, proxyenv,
1077 proxyauth, wwwauth);
1078 memset(*authp, 0, strlen(*authp));
1081 goto cleanup_fetch_url;
1086 warnx("Error retrieving file `%s'", message);
1088 warnx("Unknown error retrieving file");
1089 goto cleanup_fetch_url;
1091 } /* end of ftp:// or http:// specific setup */
1093 /* Open the output file. */
1094 if (strcmp(savefile, "-") == 0) {
1096 } else if (*savefile == '|') {
1097 oldintp = xsignal(SIGPIPE, SIG_IGN);
1098 fout = popen(savefile + 1, "w");
1100 warn("Can't execute `%s'", savefile + 1);
1101 goto cleanup_fetch_url;
1105 if ((rangeend != -1 && rangeend <= restart_point) ||
1106 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1109 fprintf(ttyout, "already done\n");
1111 goto cleanup_fetch_url;
1113 if (restart_point && rangestart != -1) {
1114 if (entitylen != -1)
1115 filesize = entitylen;
1116 if (rangestart != restart_point) {
1118 "Size of `%s' differs from save file `%s'",
1120 goto cleanup_fetch_url;
1122 fout = fopen(savefile, "a");
1124 fout = fopen(savefile, "w");
1126 warn("Can't open `%s'", savefile);
1127 goto cleanup_fetch_url;
1133 if (sigsetjmp(httpabort, 1))
1134 goto cleanup_fetch_url;
1135 (void)xsignal(SIGQUIT, psummary);
1136 oldintr = xsignal(SIGINT, aborthttp);
1138 if (rcvbuf_size > bufsize) {
1140 (void)free(xferbuf);
1141 bufsize = rcvbuf_size;
1142 xferbuf = ftp_malloc(bufsize);
1149 /* Finally, suck down the file. */
1156 /* read chunk-size */
1158 if (fgets(xferbuf, bufsize, fin) == NULL) {
1159 warnx("Unexpected EOF reading chunk-size");
1160 goto cleanup_fetch_url;
1163 chunksize = strtol(xferbuf, &ep, 16);
1164 if (ep == xferbuf) {
1165 warnx("Invalid chunk-size");
1166 goto cleanup_fetch_url;
1168 if (errno == ERANGE || chunksize < 0) {
1170 warn("Chunk-size `%.*s'",
1171 (int)(ep-xferbuf), xferbuf);
1172 goto cleanup_fetch_url;
1176 * XXX: Work around bug in Apache 1.3.9 and
1177 * 1.3.11, which incorrectly put trailing
1178 * space after the chunk-size.
1183 /* skip [ chunk-ext ] */
1185 while (*ep && *ep != '\r')
1189 if (strcmp(ep, "\r\n") != 0) {
1190 warnx("Unexpected data following chunk-size");
1191 goto cleanup_fetch_url;
1193 DPRINTF("fetch_url: got chunk-size of " LLF "\n",
1195 if (chunksize == 0) {
1200 /* transfer file or chunk */
1202 struct timeval then, now, td;
1206 (void)gettimeofday(&then, NULL);
1207 bufrem = rate_get ? rate_get : bufsize;
1209 bufrem = MIN(chunksize, bufrem);
1210 while (bufrem > 0) {
1211 len = fread(xferbuf, sizeof(char),
1212 MIN(bufsize, bufrem), fin);
1217 if (fwrite(xferbuf, sizeof(char), len, fout)
1219 warn("Writing `%s'", savefile);
1220 goto cleanup_fetch_url;
1222 if (hash && !progress) {
1223 while (bytes >= hashbytes) {
1224 (void)putc('#', ttyout);
1227 (void)fflush(ttyout);
1237 (void)gettimeofday(&now, NULL);
1238 timersub(&now, &then, &td);
1241 usleep(1000000 - td.tv_usec);
1244 if (ischunked && chunksize <= 0)
1247 /* read CRLF after chunk*/
1250 if (fgets(xferbuf, bufsize, fin) == NULL) {
1251 warnx("Unexpected EOF reading chunk CRLF");
1252 goto cleanup_fetch_url;
1254 if (strcmp(xferbuf, "\r\n") != 0) {
1255 warnx("Unexpected data following chunk");
1256 goto cleanup_fetch_url;
1261 } while (ischunked);
1263 /* XXX: deal with optional trailer & CRLF here? */
1265 if (hash && !progress && bytes > 0) {
1267 (void)putc('#', ttyout);
1268 (void)putc('\n', ttyout);
1271 warn("Reading file");
1272 goto cleanup_fetch_url;
1276 if (closefunc == fclose && mtime != -1) {
1277 struct timeval tval[2];
1279 (void)gettimeofday(&tval[0], NULL);
1280 tval[1].tv_sec = mtime;
1281 tval[1].tv_usec = 0;
1285 if (utimes(savefile, tval) == -1) {
1287 "Can't change modification time to %s",
1288 rfc2822time(localtime(&mtime)));
1296 goto cleanup_fetch_url;
1299 warnx("Improper response from `%s'", host);
1303 (void)xsignal(SIGINT, oldintr);
1305 (void)xsignal(SIGPIPE, oldintp);
1310 if (closefunc != NULL && fout != NULL)
1317 memset(pass, 0, strlen(pass));
1322 FREEPTR(decodedpath);
1325 memset(ppass, 0, strlen(ppass));
1334 * Abort a HTTP retrieval
1337 aborthttp(int notused)
1344 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1345 write(fileno(ttyout), msgbuf, len);
1346 siglongjmp(httpabort, 1);
1350 * Retrieve ftp URL or classic ftp argument using FTP.
1351 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1352 * is still open (e.g, ftp xfer with trailing /)
1355 fetch_ftp(const char *url)
1357 char *cp, *xargv[5], rempath[MAXPATHLEN];
1358 char *host, *path, *dir, *file, *user, *pass;
1360 int dirhasglob, filehasglob, rval, type, xargc;
1361 int oanonftp, oautologin;
1365 DPRINTF("fetch_ftp: `%s'\n", url);
1366 host = path = dir = file = user = pass = NULL;
1371 if (STRNEQUAL(url, FTP_URL)) {
1372 if ((parse_url(url, "URL", &urltype, &user, &pass,
1373 &host, &port, &portnum, &path) == -1) ||
1374 (user != NULL && *user == '\0') ||
1375 EMPTYSTRING(host)) {
1376 warnx("Invalid URL `%s'", url);
1377 goto cleanup_fetch_ftp;
1380 * Note: Don't url_decode(path) here. We need to keep the
1381 * distinction between "/" and "%2F" until later.
1384 /* check for trailing ';type=[aid]' */
1385 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1386 if (strcasecmp(cp, ";type=a") == 0)
1388 else if (strcasecmp(cp, ";type=i") == 0)
1390 else if (strcasecmp(cp, ";type=d") == 0) {
1392 "Directory listing via a URL is not supported");
1393 goto cleanup_fetch_ftp;
1395 warnx("Invalid suffix `%s' in URL `%s'", cp,
1397 goto cleanup_fetch_ftp;
1401 } else { /* classic style `[user@]host:[file]' */
1402 urltype = CLASSIC_URL_T;
1403 host = ftp_strdup(url);
1404 cp = strchr(host, '@');
1408 anonftp = 0; /* disable anonftp */
1409 host = ftp_strdup(cp + 1);
1411 cp = strchr(host, ':');
1414 path = ftp_strdup(cp + 1);
1417 if (EMPTYSTRING(host))
1418 goto cleanup_fetch_ftp;
1420 /* Extract the file and (if present) directory name. */
1422 if (! EMPTYSTRING(dir)) {
1424 * If we are dealing with classic `[user@]host:[path]' syntax,
1425 * then a path of the form `/file' (resulting from input of the
1426 * form `host:/file') means that we should do "CWD /" before
1427 * retrieving the file. So we set dir="/" and file="file".
1429 * But if we are dealing with URLs like `ftp://host/path' then
1430 * a path of the form `/file' (resulting from a URL of the form
1431 * `ftp://host//file') means that we should do `CWD ' (with an
1432 * empty argument) before retrieving the file. So we set
1433 * dir="" and file="file".
1435 * If the path does not contain / at all, we set dir=NULL.
1436 * (We get a path without any slashes if we are dealing with
1437 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1439 * In all other cases, we set dir to a string that does not
1440 * include the final '/' that separates the dir part from the
1441 * file part of the path. (This will be the empty string if
1442 * and only if we are dealing with a path of the form `/file'
1443 * resulting from an URL of the form `ftp://host//file'.)
1445 cp = strrchr(dir, '/');
1446 if (cp == dir && urltype == CLASSIC_URL_T) {
1449 } else if (cp != NULL) {
1458 if (urltype == FTP_URL_T && file != NULL) {
1460 /* but still don't url_decode(dir) */
1462 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1463 "path `%s' dir `%s' file `%s'\n",
1464 STRorNULL(user), STRorNULL(pass),
1465 STRorNULL(host), STRorNULL(port),
1466 STRorNULL(path), STRorNULL(dir), STRorNULL(file));
1468 dirhasglob = filehasglob = 0;
1469 if (doglob && urltype == CLASSIC_URL_T) {
1470 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1472 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1476 /* Set up the connection */
1479 disconnect(0, NULL);
1481 xargv[0] = (char *)getprogname(); /* XXX discards const */
1490 oautologin = autologin;
1491 /* don't autologin in setpeer(), use ftp_login() below */
1493 setpeer(xargc, xargv);
1494 autologin = oautologin;
1495 if ((connected == 0) ||
1496 (connected == 1 && !ftp_login(host, user, pass))) {
1497 warnx("Can't connect or login to host `%s'", host);
1498 goto cleanup_fetch_ftp;
1506 setbinary(1, xargv);
1509 errx(1, "fetch_ftp: unknown transfer type %d", type);
1513 * Change directories, if necessary.
1515 * Note: don't use EMPTYSTRING(dir) below, because
1516 * dir=="" means something different from dir==NULL.
1518 if (dir != NULL && !dirhasglob) {
1522 * If we are dealing with a classic `[user@]host:[path]'
1523 * (urltype is CLASSIC_URL_T) then we have a raw directory
1524 * name (not encoded in any way) and we can change
1525 * directories in one step.
1527 * If we are dealing with an `ftp://host/path' URL
1528 * (urltype is FTP_URL_T), then RFC3986 says we need to
1529 * send a separate CWD command for each unescaped "/"
1530 * in the path, and we have to interpret %hex escaping
1531 * *after* we find the slashes. It's possible to get
1532 * empty components here, (from multiple adjacent
1533 * slashes in the path) and RFC3986 says that we should
1534 * still do `CWD ' (with a null argument) in such cases.
1536 * Many ftp servers don't support `CWD ', so if there's an
1537 * error performing that command, bail out with a descriptive
1542 * host: dir="", urltype=CLASSIC_URL_T
1543 * logged in (to default directory)
1544 * host:file dir=NULL, urltype=CLASSIC_URL_T
1546 * host:dir/ dir="dir", urltype=CLASSIC_URL_T
1547 * "CWD dir", logged in
1548 * ftp://host/ dir="", urltype=FTP_URL_T
1549 * logged in (to default directory)
1550 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
1551 * "CWD dir", logged in
1552 * ftp://host/file dir=NULL, urltype=FTP_URL_T
1554 * ftp://host//file dir="", urltype=FTP_URL_T
1555 * "CWD ", "RETR file"
1556 * host:/file dir="/", urltype=CLASSIC_URL_T
1557 * "CWD /", "RETR file"
1558 * ftp://host///file dir="/", urltype=FTP_URL_T
1559 * "CWD ", "CWD ", "RETR file"
1560 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
1561 * "CWD /", "RETR file"
1562 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
1563 * "CWD foo", "RETR file"
1564 * ftp://host/foo/bar/file dir="foo/bar"
1565 * "CWD foo", "CWD bar", "RETR file"
1566 * ftp://host//foo/bar/file dir="/foo/bar"
1567 * "CWD ", "CWD foo", "CWD bar", "RETR file"
1568 * ftp://host/foo//bar/file dir="foo//bar"
1569 * "CWD foo", "CWD ", "CWD bar", "RETR file"
1570 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
1571 * "CWD /", "CWD foo", "CWD bar", "RETR file"
1572 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
1573 * "CWD /foo", "CWD bar", "RETR file"
1574 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
1575 * "CWD /foo/bar", "RETR file"
1576 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
1577 * "RETR /foo/bar/file"
1579 * Note that we don't need `dir' after this point.
1582 if (urltype == FTP_URL_T) {
1583 nextpart = strchr(dir, '/');
1591 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n",
1592 STRorNULL(dir), STRorNULL(nextpart));
1593 if (urltype == FTP_URL_T || *dir != '\0') {
1600 if (*dir == '\0' && code == 500)
1603 "ftp: The `CWD ' command (without a directory), which is required by\n"
1604 " RFC3986 to support the empty directory in the URL pathname (`//'),\n"
1605 " conflicts with the server's conformance to RFC0959.\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). */
1632 if (dirhasglob || filehasglob) {
1635 ointeractive = interactive;
1637 if (restartautofetch)
1638 xargv[0] = "mreget";
1642 interactive = ointeractive;
1644 if (outfile == NULL) {
1645 cp = strrchr(file, '/'); /* find savefile */
1651 xargv[2] = (char *)outfile;
1654 if (restartautofetch)
1655 reget(xargc, xargv);
1660 if ((code / 100) == COMPLETE)
1669 memset(pass, 0, strlen(pass));
1675 * Retrieve the given file to outfile.
1676 * Supports arguments of the form:
1677 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1679 * "http://host/path" call fetch_url() to use HTTP
1680 * "file:///path" call fetch_url() to copy
1681 * "about:..." print a message
1683 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1684 * is still open (e.g, ftp xfer with trailing /)
1687 go_fetch(const char *url)
1695 if (STRNEQUAL(url, ABOUT_URL)) {
1696 url += sizeof(ABOUT_URL) -1;
1697 if (strcasecmp(url, "ftp") == 0 ||
1698 strcasecmp(url, "tnftp") == 0) {
1700 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1701 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1702 } else if (strcasecmp(url, "lukem") == 0) {
1704 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1705 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1706 } else if (strcasecmp(url, "netbsd") == 0) {
1708 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1709 "For more information, see http://www.NetBSD.org/\n", ttyout);
1710 } else if (strcasecmp(url, "version") == 0) {
1711 fprintf(ttyout, "Version: %s %s%s\n",
1712 FTP_PRODUCT, FTP_VERSION,
1720 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1722 fputs("\n", ttyout);
1728 * Check for file:// and http:// URLs.
1730 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1731 return (fetch_url(url, NULL, NULL, NULL));
1734 * Try FTP URL-style and host:file arguments next.
1735 * If ftpproxy is set with an FTP URL, use fetch_url()
1736 * Othewise, use fetch_ftp().
1738 proxy = getoptionvalue("ftp_proxy");
1739 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL))
1740 return (fetch_url(url, NULL, NULL, NULL));
1742 return (fetch_ftp(url));
1746 * Retrieve multiple files from the command line,
1747 * calling go_fetch() for each file.
1749 * If an ftp path has a trailing "/", the path will be cd-ed into and
1750 * the connection remains open, and the function will return -1
1751 * (to indicate the connection is alive).
1752 * If an error occurs the return value will be the offset+1 in
1753 * argv[] of the file that caused a problem (i.e, argv[x]
1755 * Otherwise, 0 is returned if all files retrieved successfully.
1758 auto_fetch(int argc, char *argv[])
1760 volatile int argpos, rval;
1764 if (sigsetjmp(toplevel, 1)) {
1766 disconnect(0, NULL);
1771 (void)xsignal(SIGINT, intr);
1772 (void)xsignal(SIGPIPE, lostpeer);
1775 * Loop through as long as there's files to fetch.
1777 for (; (rval == 0) && (argpos < argc); argpos++) {
1778 if (strchr(argv[argpos], ':') == NULL)
1782 anonftp = 2; /* Handle "automatic" transfers. */
1783 rval = go_fetch(argv[argpos]);
1784 if (outfile != NULL && strcmp(outfile, "-") != 0
1785 && outfile[0] != '|')
1791 if (connected && rval != -1)
1792 disconnect(0, NULL);
1798 * Upload multiple files from the command line.
1800 * If an error occurs the return value will be the offset+1 in
1801 * argv[] of the file that caused a problem (i.e, argv[x]
1803 * Otherwise, 0 is returned if all files uploaded successfully.
1806 auto_put(int argc, char **argv, const char *uploadserver)
1808 char *uargv[4], *path, *pathsep;
1809 int uargc, rval, argpos;
1813 uargv[uargc++] = "mput";
1814 uargv[uargc++] = argv[0];
1815 uargv[2] = uargv[3] = NULL;
1819 DPRINTF("auto_put: target `%s'\n", uploadserver);
1821 path = ftp_strdup(uploadserver);
1823 if (path[len - 1] != '/' && path[len - 1] != ':') {
1825 * make sure we always pass a directory to auto_fetch
1827 if (argc > 1) { /* more than one file to upload */
1828 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1830 path = (char *)ftp_malloc(len);
1831 (void)strlcpy(path, uploadserver, len);
1832 (void)strlcat(path, "/", len);
1833 } else { /* single file to upload */
1835 pathsep = strrchr(path, '/');
1836 if (pathsep == NULL) {
1837 pathsep = strrchr(path, ':');
1838 if (pathsep == NULL) {
1839 warnx("Invalid URL `%s'", path);
1840 goto cleanup_auto_put;
1843 uargv[2] = ftp_strdup(pathsep);
1846 uargv[2] = ftp_strdup(pathsep + 1);
1851 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1852 path, STRorNULL(uargv[2]));
1854 /* connect and cwd */
1855 rval = auto_fetch(1, &path);
1857 goto cleanup_auto_put;
1861 /* target filename provided; upload 1 file */
1862 /* XXX : is this the best way? */
1866 if ((code / 100) != COMPLETE)
1868 } else { /* otherwise a target dir: upload all files to it */
1869 for(argpos = 0; argv[argpos] != NULL; argpos++) {
1870 uargv[1] = argv[argpos];
1872 if ((code / 100) != COMPLETE) {