1 /* $NetBSD: fetch.c,v 1.182 2007/08/22 23:47:13 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 1.182 2007/08/22 23:47:13 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!");
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 const char *emptypath = "/";
449 if (*type == FTP_URL_T) /* skip first / for ftp URLs */
451 *path = ftp_strdup(emptypath);
454 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
456 *user ? *user : "<null>", *pass ? *pass : "<null>",
457 *host ? *host : "<null>", *port ? *port : "<null>",
458 *portnum ? *portnum : -1, *path ? *path : "<null>");
463 sigjmp_buf httpabort;
466 * Retrieve URL, via a proxy if necessary, using HTTP.
467 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
468 * http_proxy as appropriate.
469 * Supports HTTP redirects.
470 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
471 * is still open (e.g, ftp xfer with trailing /)
474 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
476 struct addrinfo hints, *res, *res0 = NULL;
478 char hbuf[NI_MAXHOST];
479 sigfunc volatile oldintr;
480 sigfunc volatile oldintp;
483 int volatile ischunked;
484 int volatile isproxy;
488 static size_t bufsize;
489 static char *xferbuf;
490 const char *cp, *token;
493 const char *errormsg;
494 char *volatile savefile;
496 char *volatile location;
497 char *volatile message;
498 char *user, *pass, *host, *port, *path;
499 char *volatile decodedpath;
500 char *puser, *ppass, *useragent;
501 off_t hashbytes, rangestart, rangeend, entitylen;
502 int (*volatile closefunc)(FILE *);
509 oldintr = oldintp = NULL;
514 auth = location = message = NULL;
515 ischunked = isproxy = hcode = 0;
517 user = pass = host = path = decodedpath = puser = ppass = NULL;
519 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port,
520 &portnum, &path) == -1)
521 goto cleanup_fetch_url;
523 if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
524 && strcasecmp(host, "localhost") != 0) {
525 warnx("No support for non local file URL `%s'", url);
526 goto cleanup_fetch_url;
529 if (EMPTYSTRING(path)) {
530 if (urltype == FTP_URL_T) {
531 rval = fetch_ftp(url);
532 goto cleanup_fetch_url;
534 if (urltype != HTTP_URL_T || outfile == NULL) {
535 warnx("Invalid URL (no file after host) `%s'", url);
536 goto cleanup_fetch_url;
540 decodedpath = ftp_strdup(path);
541 url_decode(decodedpath);
544 savefile = ftp_strdup(outfile);
546 cp = strrchr(decodedpath, '/'); /* find savefile */
548 savefile = ftp_strdup(cp + 1);
550 savefile = ftp_strdup(decodedpath);
552 if (EMPTYSTRING(savefile)) {
553 if (urltype == FTP_URL_T) {
554 rval = fetch_ftp(url);
555 goto cleanup_fetch_url;
557 warnx("No file after directory (you must specify an "
558 "output file) `%s'", url);
559 goto cleanup_fetch_url;
561 DPRINTF("savefile `%s'\n", savefile);
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;
616 /* check URL against list of no_proxied sites */
617 no_proxy = getoptionvalue("no_proxy");
618 if (! EMPTYSTRING(no_proxy)) {
619 char *np, *np_copy, *np_iter;
623 np_iter = np_copy = ftp_strdup(no_proxy);
625 while ((cp = strsep(&np_iter, " ,")) != NULL) {
628 if ((np = strrchr(cp, ':')) != NULL) {
631 strtol(np + 1, &ep, 10);
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, &portnum,
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, NULL, &hints, &res0);
704 warnx("Can't lookup `%s': %s", host,
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) {
715 if (getnameinfo(res->ai_addr, res->ai_addrlen,
716 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
717 strlcpy(hbuf, "?", sizeof(hbuf));
719 if (verbose && res0->ai_next) {
720 fprintf(ttyout, "Trying %s...\n", hbuf);
723 ((struct sockaddr_in *)res->ai_addr)->sin_port =
725 s = socket(res->ai_family, SOCK_STREAM,
729 "Can't create socket for connection to `%s'",
734 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
745 warnx("Can't connect to `%s'", host);
746 goto cleanup_fetch_url;
749 fin = fdopen(s, "r+");
751 * Construct and send the request.
754 fprintf(ttyout, "Requesting %s\n", url);
759 fprintf(ttyout, "%svia %s:%s", leading,
764 fprintf(fin, "GET %s HTTP/1.0\r\n", path);
766 fprintf(fin, "Pragma: no-cache\r\n");
768 fprintf(fin, "GET %s HTTP/1.1\r\n", path);
769 if (strchr(host, ':')) {
773 * strip off IPv6 scope identifier, since it is
776 h = ftp_strdup(host);
778 (p = strchr(h, '%')) != NULL) {
781 fprintf(fin, "Host: [%s]", h);
784 fprintf(fin, "Host: %s", host);
785 if (portnum != HTTP_PORT)
786 fprintf(fin, ":%u", portnum);
787 fprintf(fin, "\r\n");
788 fprintf(fin, "Accept: */*\r\n");
789 fprintf(fin, "Connection: close\r\n");
791 fputs(leading, ttyout);
792 fprintf(fin, "Range: bytes=" LLF "-\r\n",
794 fprintf(ttyout, "restarting at " LLF,
800 fprintf(fin, "Cache-Control: no-cache\r\n");
802 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
803 fprintf(fin, "User-Agent: %s\r\n", useragent);
805 fprintf(fin, "User-Agent: %s/%s\r\n",
806 FTP_PRODUCT, FTP_VERSION);
810 fprintf(ttyout, "%swith authorization",
815 fprintf(fin, "Authorization: %s\r\n", wwwauth);
820 "%swith proxy authorization", leading);
824 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
826 if (verbose && hasleading)
827 fputs(")\n", ttyout);
828 fprintf(fin, "\r\n");
829 if (fflush(fin) == EOF) {
830 warn("Writing HTTP request");
831 goto cleanup_fetch_url;
834 /* Read the response */
835 len = getline(fin, buf, sizeof(buf), &errormsg);
837 if (*errormsg == '\n')
839 warnx("Receiving HTTP reply: %s", errormsg);
840 goto cleanup_fetch_url;
842 while (len > 0 && (ISLWS(buf[len-1])))
844 DPRINTF("received `%s'\n", buf);
846 /* Determine HTTP response code */
847 cp = strchr(buf, ' ');
852 hcode = strtol(cp, &ep, 10);
853 if (*ep != '\0' && !isspace((unsigned char)*ep))
855 message = ftp_strdup(cp);
857 /* Read the rest of the header. */
859 len = getline(fin, buf, sizeof(buf), &errormsg);
861 if (*errormsg == '\n')
863 warnx("Receiving HTTP reply: %s", errormsg);
864 goto cleanup_fetch_url;
866 while (len > 0 && (ISLWS(buf[len-1])))
870 DPRINTF("received `%s'\n", buf);
873 * Look for some headers
878 if (match_token(&cp, "Content-Length:")) {
879 filesize = STRTOLL(cp, &ep, 10);
880 if (filesize < 0 || *ep != '\0')
882 DPRINTF("parsed len as: " LLF "\n",
885 } else if (match_token(&cp, "Content-Range:")) {
886 if (! match_token(&cp, "bytes"))
892 rangestart = STRTOLL(cp, &ep, 10);
893 if (rangestart < 0 || *ep != '-')
896 rangeend = STRTOLL(cp, &ep, 10);
897 if (rangeend < 0 || rangeend < rangestart)
907 entitylen = STRTOLL(cp, &ep, 10);
917 fprintf(ttyout, "parsed range as: ");
918 if (rangestart == -1)
919 fprintf(ttyout, "*");
921 fprintf(ttyout, LLF "-" LLF,
924 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
927 if (! restart_point) {
929 "Received unexpected Content-Range header");
930 goto cleanup_fetch_url;
933 } else if (match_token(&cp, "Last-Modified:")) {
937 memset(&parsed, 0, sizeof(parsed));
939 if ((t = strptime(cp,
940 "%a, %d %b %Y %H:%M:%S GMT",
944 "%a, %d-%b-%y %H:%M:%S GMT",
948 "%a, %b %d %H:%M:%S %Y",
950 parsed.tm_isdst = -1;
952 mtime = timegm(&parsed);
954 if (ftp_debug && mtime != -1) {
956 "parsed date as: %s",
957 rfc2822time(localtime(&mtime)));
962 } else if (match_token(&cp, "Location:")) {
963 location = ftp_strdup(cp);
964 DPRINTF("parsed location as `%s'\n", cp);
966 } else if (match_token(&cp, "Transfer-Encoding:")) {
967 if (match_token(&cp, "binary")) {
969 "Bogus transfer encoding `binary' (fetching anyway)");
972 if (! (token = match_token(&cp, "chunked"))) {
974 "Unsupported transfer encoding `%s'",
976 goto cleanup_fetch_url;
979 DPRINTF("using chunked encoding\n");
981 } else if (match_token(&cp, "Proxy-Authenticate:")
982 || match_token(&cp, "WWW-Authenticate:")) {
983 if (! (token = match_token(&cp, "Basic"))) {
985 "skipping unknown auth scheme `%s'\n",
990 auth = ftp_strdup(token);
991 DPRINTF("parsed auth as `%s'\n", cp);
995 /* finished parsing header */
1001 if (! restart_point) {
1002 warnx("Not expecting partial content header");
1003 goto cleanup_fetch_url;
1012 if (EMPTYSTRING(location)) {
1014 "No redirection Location provided by server");
1015 goto cleanup_fetch_url;
1017 if (redirect_loop++ > 5) {
1018 warnx("Too many redirections requested");
1019 goto cleanup_fetch_url;
1023 fprintf(ttyout, "Redirected via %s\n",
1025 rval = fetch_url(url, location,
1026 proxyauth, wwwauth);
1029 fprintf(ttyout, "Redirected to %s\n",
1031 rval = go_fetch(location);
1033 goto cleanup_fetch_url;
1039 char *auser, *apass;
1050 if (verbose || *authp == NULL ||
1051 auser == NULL || apass == NULL)
1052 fprintf(ttyout, "%s\n", message);
1053 if (EMPTYSTRING(auth)) {
1055 "No authentication challenge provided by server");
1056 goto cleanup_fetch_url;
1058 if (*authp != NULL) {
1062 "Authorization failed. Retry (y/n)? ");
1063 if (getline(stdin, reply, sizeof(reply), NULL)
1065 goto cleanup_fetch_url;
1067 if (tolower((unsigned char)reply[0]) != 'y')
1068 goto cleanup_fetch_url;
1072 if (auth_url(auth, authp, auser, apass) == 0) {
1073 rval = fetch_url(url, proxyenv,
1074 proxyauth, wwwauth);
1075 memset(*authp, 0, strlen(*authp));
1078 goto cleanup_fetch_url;
1083 warnx("Error retrieving file `%s'", message);
1085 warnx("Unknown error retrieving file");
1086 goto cleanup_fetch_url;
1088 } /* end of ftp:// or http:// specific setup */
1090 /* Open the output file. */
1091 if (strcmp(savefile, "-") == 0) {
1093 } else if (*savefile == '|') {
1094 oldintp = xsignal(SIGPIPE, SIG_IGN);
1095 fout = popen(savefile + 1, "w");
1097 warn("Can't execute `%s'", savefile + 1);
1098 goto cleanup_fetch_url;
1102 if ((rangeend != -1 && rangeend <= restart_point) ||
1103 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1106 fprintf(ttyout, "already done\n");
1108 goto cleanup_fetch_url;
1110 if (restart_point && rangestart != -1) {
1111 if (entitylen != -1)
1112 filesize = entitylen;
1113 if (rangestart != restart_point) {
1115 "Size of `%s' differs from save file `%s'",
1117 goto cleanup_fetch_url;
1119 fout = fopen(savefile, "a");
1121 fout = fopen(savefile, "w");
1123 warn("Can't open `%s'", savefile);
1124 goto cleanup_fetch_url;
1130 if (sigsetjmp(httpabort, 1))
1131 goto cleanup_fetch_url;
1132 (void)xsignal(SIGQUIT, psummary);
1133 oldintr = xsignal(SIGINT, aborthttp);
1135 if (rcvbuf_size > bufsize) {
1137 (void)free(xferbuf);
1138 bufsize = rcvbuf_size;
1139 xferbuf = ftp_malloc(bufsize);
1146 /* Finally, suck down the file. */
1153 /* read chunk-size */
1155 if (fgets(xferbuf, bufsize, fin) == NULL) {
1156 warnx("Unexpected EOF reading chunk-size");
1157 goto cleanup_fetch_url;
1160 chunksize = strtol(xferbuf, &ep, 16);
1161 if (ep == xferbuf) {
1162 warnx("Invalid chunk-size");
1163 goto cleanup_fetch_url;
1165 if (errno == ERANGE || chunksize < 0) {
1167 warn("Chunk-size `%.*s'",
1168 (int)(ep-xferbuf), xferbuf);
1169 goto cleanup_fetch_url;
1173 * XXX: Work around bug in Apache 1.3.9 and
1174 * 1.3.11, which incorrectly put trailing
1175 * space after the chunk-size.
1180 /* skip [ chunk-ext ] */
1182 while (*ep && *ep != '\r')
1186 if (strcmp(ep, "\r\n") != 0) {
1187 warnx("Unexpected data following chunk-size");
1188 goto cleanup_fetch_url;
1190 DPRINTF("got chunk-size of " LLF "\n", (LLT)chunksize);
1191 if (chunksize == 0) {
1196 /* transfer file or chunk */
1198 struct timeval then, now, td;
1202 (void)gettimeofday(&then, NULL);
1203 bufrem = rate_get ? rate_get : bufsize;
1205 bufrem = MIN(chunksize, bufrem);
1206 while (bufrem > 0) {
1207 len = fread(xferbuf, sizeof(char),
1208 MIN(bufsize, bufrem), fin);
1213 if (fwrite(xferbuf, sizeof(char), len, fout)
1215 warn("Writing `%s'", savefile);
1216 goto cleanup_fetch_url;
1218 if (hash && !progress) {
1219 while (bytes >= hashbytes) {
1220 (void)putc('#', ttyout);
1223 (void)fflush(ttyout);
1233 (void)gettimeofday(&now, NULL);
1234 timersub(&now, &then, &td);
1237 usleep(1000000 - td.tv_usec);
1240 if (ischunked && chunksize <= 0)
1243 /* read CRLF after chunk*/
1246 if (fgets(xferbuf, bufsize, fin) == NULL) {
1247 warnx("Unexpected EOF reading chunk CRLF");
1248 goto cleanup_fetch_url;
1250 if (strcmp(xferbuf, "\r\n") != 0) {
1251 warnx("Unexpected data following chunk");
1252 goto cleanup_fetch_url;
1257 } while (ischunked);
1259 /* XXX: deal with optional trailer & CRLF here? */
1261 if (hash && !progress && bytes > 0) {
1263 (void)putc('#', ttyout);
1264 (void)putc('\n', ttyout);
1267 warn("Reading file");
1268 goto cleanup_fetch_url;
1272 if (closefunc == fclose && mtime != -1) {
1273 struct timeval tval[2];
1275 (void)gettimeofday(&tval[0], NULL);
1276 tval[1].tv_sec = mtime;
1277 tval[1].tv_usec = 0;
1281 if (utimes(savefile, tval) == -1) {
1283 "Can't change modification time to %s",
1284 rfc2822time(localtime(&mtime)));
1292 goto cleanup_fetch_url;
1295 warnx("Improper response from `%s'", host);
1299 (void)xsignal(SIGINT, oldintr);
1301 (void)xsignal(SIGPIPE, oldintp);
1306 if (closefunc != NULL && fout != NULL)
1313 memset(pass, 0, strlen(pass));
1318 FREEPTR(decodedpath);
1321 memset(ppass, 0, strlen(ppass));
1330 * Abort a HTTP retrieval
1333 aborthttp(int notused)
1340 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1341 write(fileno(ttyout), msgbuf, len);
1342 siglongjmp(httpabort, 1);
1346 * Retrieve ftp URL or classic ftp argument using FTP.
1347 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1348 * is still open (e.g, ftp xfer with trailing /)
1351 fetch_ftp(const char *url)
1353 char *cp, *xargv[5], rempath[MAXPATHLEN];
1354 char *host, *path, *dir, *file, *user, *pass;
1356 int dirhasglob, filehasglob, rval, type, xargc;
1357 int oanonftp, oautologin;
1361 host = path = dir = file = user = pass = NULL;
1366 if (STRNEQUAL(url, FTP_URL)) {
1367 if ((parse_url(url, "URL", &urltype, &user, &pass,
1368 &host, &port, &portnum, &path) == -1) ||
1369 (user != NULL && *user == '\0') ||
1370 EMPTYSTRING(host)) {
1371 warnx("Invalid URL `%s'", url);
1372 goto cleanup_fetch_ftp;
1375 * Note: Don't url_decode(path) here. We need to keep the
1376 * distinction between "/" and "%2F" until later.
1379 /* check for trailing ';type=[aid]' */
1380 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1381 if (strcasecmp(cp, ";type=a") == 0)
1383 else if (strcasecmp(cp, ";type=i") == 0)
1385 else if (strcasecmp(cp, ";type=d") == 0) {
1387 "Directory listing via a URL is not supported");
1388 goto cleanup_fetch_ftp;
1390 warnx("Invalid suffix `%s' in URL `%s'", cp,
1392 goto cleanup_fetch_ftp;
1396 } else { /* classic style `[user@]host:[file]' */
1397 urltype = CLASSIC_URL_T;
1398 host = ftp_strdup(url);
1399 cp = strchr(host, '@');
1403 anonftp = 0; /* disable anonftp */
1404 host = ftp_strdup(cp + 1);
1406 cp = strchr(host, ':');
1409 path = ftp_strdup(cp + 1);
1412 if (EMPTYSTRING(host))
1413 goto cleanup_fetch_ftp;
1415 /* Extract the file and (if present) directory name. */
1417 if (! EMPTYSTRING(dir)) {
1419 * If we are dealing with classic `[user@]host:[path]' syntax,
1420 * then a path of the form `/file' (resulting from input of the
1421 * form `host:/file') means that we should do "CWD /" before
1422 * retrieving the file. So we set dir="/" and file="file".
1424 * But if we are dealing with URLs like `ftp://host/path' then
1425 * a path of the form `/file' (resulting from a URL of the form
1426 * `ftp://host//file') means that we should do `CWD ' (with an
1427 * empty argument) before retrieving the file. So we set
1428 * dir="" and file="file".
1430 * If the path does not contain / at all, we set dir=NULL.
1431 * (We get a path without any slashes if we are dealing with
1432 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1434 * In all other cases, we set dir to a string that does not
1435 * include the final '/' that separates the dir part from the
1436 * file part of the path. (This will be the empty string if
1437 * and only if we are dealing with a path of the form `/file'
1438 * resulting from an URL of the form `ftp://host//file'.)
1440 cp = strrchr(dir, '/');
1441 if (cp == dir && urltype == CLASSIC_URL_T) {
1444 } else if (cp != NULL) {
1453 if (urltype == FTP_URL_T && file != NULL) {
1455 /* but still don't url_decode(dir) */
1457 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1458 "path `%s' dir `%s' file `%s'\n",
1459 user ? user : "<null>", pass ? pass : "<null>",
1460 host ? host : "<null>", port ? port : "<null>",
1461 path ? path : "<null>",
1462 dir ? dir : "<null>", file ? file : "<null>");
1464 dirhasglob = filehasglob = 0;
1465 if (doglob && urltype == CLASSIC_URL_T) {
1466 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1468 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1472 /* Set up the connection */
1475 disconnect(0, NULL);
1477 xargv[0] = (char *)getprogname(); /* XXX discards const */
1486 oautologin = autologin;
1487 /* don't autologin in setpeer(), use ftp_login() below */
1489 setpeer(xargc, xargv);
1490 autologin = oautologin;
1491 if ((connected == 0) ||
1492 (connected == 1 && !ftp_login(host, user, pass))) {
1493 warnx("Can't connect or login to host `%s'", host);
1494 goto cleanup_fetch_ftp;
1502 setbinary(1, xargv);
1505 errx(1, "fetch_ftp: unknown transfer type %d", type);
1509 * Change directories, if necessary.
1511 * Note: don't use EMPTYSTRING(dir) below, because
1512 * dir=="" means something different from dir==NULL.
1514 if (dir != NULL && !dirhasglob) {
1518 * If we are dealing with a classic `[user@]host:[path]'
1519 * (urltype is CLASSIC_URL_T) then we have a raw directory
1520 * name (not encoded in any way) and we can change
1521 * directories in one step.
1523 * If we are dealing with an `ftp://host/path' URL
1524 * (urltype is FTP_URL_T), then RFC3986 says we need to
1525 * send a separate CWD command for each unescaped "/"
1526 * in the path, and we have to interpret %hex escaping
1527 * *after* we find the slashes. It's possible to get
1528 * empty components here, (from multiple adjacent
1529 * slashes in the path) and RFC3986 says that we should
1530 * still do `CWD ' (with a null argument) in such cases.
1532 * Many ftp servers don't support `CWD ', so if there's an
1533 * error performing that command, bail out with a descriptive
1538 * host: dir="", urltype=CLASSIC_URL_T
1539 * logged in (to default directory)
1540 * host:file dir=NULL, urltype=CLASSIC_URL_T
1542 * host:dir/ dir="dir", urltype=CLASSIC_URL_T
1543 * "CWD dir", logged in
1544 * ftp://host/ dir="", urltype=FTP_URL_T
1545 * logged in (to default directory)
1546 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
1547 * "CWD dir", logged in
1548 * ftp://host/file dir=NULL, urltype=FTP_URL_T
1550 * ftp://host//file dir="", urltype=FTP_URL_T
1551 * "CWD ", "RETR file"
1552 * host:/file dir="/", urltype=CLASSIC_URL_T
1553 * "CWD /", "RETR file"
1554 * ftp://host///file dir="/", urltype=FTP_URL_T
1555 * "CWD ", "CWD ", "RETR file"
1556 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
1557 * "CWD /", "RETR file"
1558 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
1559 * "CWD foo", "RETR file"
1560 * ftp://host/foo/bar/file dir="foo/bar"
1561 * "CWD foo", "CWD bar", "RETR file"
1562 * ftp://host//foo/bar/file dir="/foo/bar"
1563 * "CWD ", "CWD foo", "CWD bar", "RETR file"
1564 * ftp://host/foo//bar/file dir="foo//bar"
1565 * "CWD foo", "CWD ", "CWD bar", "RETR file"
1566 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
1567 * "CWD /", "CWD foo", "CWD bar", "RETR file"
1568 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
1569 * "CWD /foo", "CWD bar", "RETR file"
1570 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
1571 * "CWD /foo/bar", "RETR file"
1572 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
1573 * "RETR /foo/bar/file"
1575 * Note that we don't need `dir' after this point.
1578 if (urltype == FTP_URL_T) {
1579 nextpart = strchr(dir, '/');
1587 DPRINTF("dir `%s', nextpart `%s'\n",
1588 dir ? dir : "<null>",
1589 nextpart ? nextpart : "<null>");
1590 if (urltype == FTP_URL_T || *dir != '\0') {
1597 if (*dir == '\0' && code == 500)
1600 "ftp: The `CWD ' command (without a directory), which is required by\n"
1601 " RFC3986 to support the empty directory in the URL pathname (`//'),\n"
1602 " conflicts with the server's conformance to RFC0959.\n"
1603 " Try the same URL without the `//' in the URL pathname.\n"
1605 goto cleanup_fetch_ftp;
1609 } while (dir != NULL);
1612 if (EMPTYSTRING(file)) {
1614 goto cleanup_fetch_ftp;
1618 (void)strlcpy(rempath, dir, sizeof(rempath));
1619 (void)strlcat(rempath, "/", sizeof(rempath));
1620 (void)strlcat(rempath, file, sizeof(rempath));
1624 /* Fetch the file(s). */
1629 if (dirhasglob || filehasglob) {
1632 ointeractive = interactive;
1634 if (restartautofetch)
1635 xargv[0] = "mreget";
1639 interactive = ointeractive;
1641 if (outfile == NULL) {
1642 cp = strrchr(file, '/'); /* find savefile */
1648 xargv[2] = (char *)outfile;
1651 if (restartautofetch)
1652 reget(xargc, xargv);
1657 if ((code / 100) == COMPLETE)
1666 memset(pass, 0, strlen(pass));
1672 * Retrieve the given file to outfile.
1673 * Supports arguments of the form:
1674 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1676 * "http://host/path" call fetch_url() to use HTTP
1677 * "file:///path" call fetch_url() to copy
1678 * "about:..." print a message
1680 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1681 * is still open (e.g, ftp xfer with trailing /)
1684 go_fetch(const char *url)
1692 if (STRNEQUAL(url, ABOUT_URL)) {
1693 url += sizeof(ABOUT_URL) -1;
1694 if (strcasecmp(url, "ftp") == 0 ||
1695 strcasecmp(url, "tnftp") == 0) {
1697 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1698 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1699 } else if (strcasecmp(url, "lukem") == 0) {
1701 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1702 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1703 } else if (strcasecmp(url, "netbsd") == 0) {
1705 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1706 "For more information, see http://www.NetBSD.org/\n", ttyout);
1707 } else if (strcasecmp(url, "version") == 0) {
1708 fprintf(ttyout, "Version: %s %s%s\n",
1709 FTP_PRODUCT, FTP_VERSION,
1717 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1719 fputs("\n", ttyout);
1725 * Check for file:// and http:// URLs.
1727 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1728 return (fetch_url(url, NULL, NULL, NULL));
1731 * Try FTP URL-style and host:file arguments next.
1732 * If ftpproxy is set with an FTP URL, use fetch_url()
1733 * Othewise, use fetch_ftp().
1735 proxy = getoptionvalue("ftp_proxy");
1736 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL))
1737 return (fetch_url(url, NULL, NULL, NULL));
1739 return (fetch_ftp(url));
1743 * Retrieve multiple files from the command line,
1744 * calling go_fetch() for each file.
1746 * If an ftp path has a trailing "/", the path will be cd-ed into and
1747 * the connection remains open, and the function will return -1
1748 * (to indicate the connection is alive).
1749 * If an error occurs the return value will be the offset+1 in
1750 * argv[] of the file that caused a problem (i.e, argv[x]
1752 * Otherwise, 0 is returned if all files retrieved successfully.
1755 auto_fetch(int argc, char *argv[])
1757 volatile int argpos, rval;
1761 if (sigsetjmp(toplevel, 1)) {
1763 disconnect(0, NULL);
1768 (void)xsignal(SIGINT, intr);
1769 (void)xsignal(SIGPIPE, lostpeer);
1772 * Loop through as long as there's files to fetch.
1774 for (; (rval == 0) && (argpos < argc); argpos++) {
1775 if (strchr(argv[argpos], ':') == NULL)
1779 anonftp = 2; /* Handle "automatic" transfers. */
1780 rval = go_fetch(argv[argpos]);
1781 if (outfile != NULL && strcmp(outfile, "-") != 0
1782 && outfile[0] != '|')
1788 if (connected && rval != -1)
1789 disconnect(0, NULL);
1795 * Upload multiple files from the command line.
1797 * If an error occurs the return value will be the offset+1 in
1798 * argv[] of the file that caused a problem (i.e, argv[x]
1800 * Otherwise, 0 is returned if all files uploaded successfully.
1803 auto_put(int argc, char **argv, const char *uploadserver)
1805 char *uargv[4], *path, *pathsep;
1806 int uargc, rval, argpos;
1810 uargv[uargc++] = "mput";
1811 uargv[uargc++] = argv[0];
1812 uargv[2] = uargv[3] = NULL;
1816 DPRINTF("auto_put: target `%s'\n", uploadserver);
1818 path = ftp_strdup(uploadserver);
1820 if (path[len - 1] != '/' && path[len - 1] != ':') {
1822 * make sure we always pass a directory to auto_fetch
1824 if (argc > 1) { /* more than one file to upload */
1825 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1827 path = (char *)ftp_malloc(len);
1828 (void)strlcpy(path, uploadserver, len);
1829 (void)strlcat(path, "/", len);
1830 } else { /* single file to upload */
1832 pathsep = strrchr(path, '/');
1833 if (pathsep == NULL) {
1834 pathsep = strrchr(path, ':');
1835 if (pathsep == NULL) {
1836 warnx("Invalid URL `%s'", path);
1837 goto cleanup_auto_put;
1840 uargv[2] = ftp_strdup(pathsep);
1843 uargv[2] = ftp_strdup(pathsep + 1);
1848 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1849 path, uargv[2] ? uargv[2] : "<null>");
1851 /* connect and cwd */
1852 rval = auto_fetch(1, &path);
1854 goto cleanup_auto_put;
1858 /* target filename provided; upload 1 file */
1859 /* XXX : is this the best way? */
1863 if ((code / 100) != COMPLETE)
1865 } else { /* otherwise a target dir: upload all files to it */
1866 for(argpos = 0; argv[argpos] != NULL; argpos++) {
1867 uargv[1] = argv[argpos];
1869 if ((code / 100) != COMPLETE) {