1 /* $NetBSD: fetch.c,v 1.193 2010/03/05 07:41:10 lukem Exp $ */
4 * Copyright (c) 1997-2009 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Scott Aaron Bamford.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
37 __RCSID("$NetBSD: fetch.c,v 1.193 2010/03/05 07:41:10 lukem Exp $");
41 * FTP User Program -- Command line file retrieval
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
50 #include <netinet/in.h>
53 #include <arpa/inet.h>
80 static int auth_url(const char *, char **, const char *, const char *);
81 static void base64_encode(const unsigned char *, size_t, unsigned char *);
83 static int go_fetch(const char *);
84 static int fetch_ftp(const char *);
85 static int fetch_url(const char *, const char *, char *, char *);
86 static const char *match_token(const char **, const char *);
87 static int parse_url(const char *, const char *, url_t *, char **,
88 char **, char **, char **, in_port_t *, char **);
89 static void url_decode(char *);
91 static int redirect_loop;
94 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0)
95 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
96 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0)
99 #define ABOUT_URL "about:" /* propaganda */
100 #define FILE_URL "file://" /* file URL prefix */
101 #define FTP_URL "ftp://" /* ftp URL prefix */
102 #define HTTP_URL "http://" /* http URL prefix */
106 * Determine if token is the next word in buf (case insensitive).
107 * If so, advance buf past the token and any trailing LWS, and
108 * return a pointer to the token (in buf). Otherwise, return NULL.
109 * token may be preceded by LWS.
110 * token must be followed by LWS or NUL. (I.e, don't partial match).
113 match_token(const char **buf, const char *token)
115 const char *p, *orig;
118 tlen = strlen(token);
122 if (strncasecmp(p, token, tlen) != 0)
125 if (*p != '\0' && !ISLWS(*p))
135 * Generate authorization response based on given authentication challenge.
136 * Returns -1 if an error occurred, otherwise 0.
137 * Sets response to a malloc(3)ed string; caller should free.
140 auth_url(const char *challenge, char **response, const char *guser,
143 const char *cp, *scheme, *errormsg;
144 char *ep, *clear, *realm;
145 char uuser[BUFSIZ], *gotpass;
148 size_t len, clen, rlen;
151 clear = realm = NULL;
154 scheme = "Basic"; /* only support Basic authentication */
157 DPRINTF("auth_url: challenge `%s'\n", challenge);
159 if (! match_token(&cp, scheme)) {
160 warnx("Unsupported authentication challenge `%s'",
162 goto cleanup_auth_url;
165 #define REALM "realm=\""
166 if (STRNEQUAL(cp, REALM))
167 cp += sizeof(REALM) - 1;
169 warnx("Unsupported authentication challenge `%s'",
171 goto cleanup_auth_url;
173 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
174 if ((ep = strchr(cp, '\"')) != NULL) {
176 realm = (char *)ftp_malloc(len + 1);
177 (void)strlcpy(realm, cp, len + 1);
179 warnx("Unsupported authentication challenge `%s'",
181 goto cleanup_auth_url;
184 fprintf(ttyout, "Username for `%s': ", realm);
186 (void)strlcpy(uuser, guser, sizeof(uuser));
187 fprintf(ttyout, "%s\n", uuser);
189 (void)fflush(ttyout);
190 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) {
191 warnx("%s; can't authenticate", errormsg);
192 goto cleanup_auth_url;
198 gotpass = getpass("Password: ");
199 if (gotpass == NULL) {
200 warnx("Can't read password");
201 goto cleanup_auth_url;
206 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */
207 clear = (char *)ftp_malloc(clen);
208 (void)strlcpy(clear, uuser, clen);
209 (void)strlcat(clear, ":", clen);
210 (void)strlcat(clear, upass, clen);
212 memset(gotpass, 0, strlen(gotpass));
214 /* scheme + " " + enc + "\0" */
215 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
216 *response = (char *)ftp_malloc(rlen);
217 (void)strlcpy(*response, scheme, rlen);
218 len = strlcat(*response, " ", rlen);
219 /* use `clen - 1' to not encode the trailing NUL */
220 base64_encode((unsigned char *)clear, clen - 1,
221 (unsigned char *)*response + len);
222 memset(clear, 0, clen);
232 * Encode len bytes starting at clear using base64 encoding into encoded,
233 * which should be at least ((len + 2) * 4 / 3 + 1) in size.
236 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
238 static const unsigned char enc[] =
239 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
244 for (i = 0; i < len; i += 3) {
245 *(cp++) = enc[((clear[i + 0] >> 2))];
246 *(cp++) = enc[((clear[i + 0] << 4) & 0x30)
247 | ((clear[i + 1] >> 4) & 0x0f)];
248 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
249 | ((clear[i + 2] >> 6) & 0x03)];
250 *(cp++) = enc[((clear[i + 2] ) & 0x3f)];
259 * Decode %xx escapes in given string, `in-place'.
262 url_decode(char *url)
264 unsigned char *p, *q;
266 if (EMPTYSTRING(url))
268 p = q = (unsigned char *)url;
270 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
273 && p[1] && isxdigit((unsigned char)p[1])
274 && p[2] && isxdigit((unsigned char)p[2])) {
275 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
285 * Parse URL of form (per RFC 3986):
286 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
287 * Returns -1 if a parse error occurred, otherwise 0.
288 * It's the caller's responsibility to url_decode() the returned
289 * user, pass and path.
291 * Sets type to url_t, each of the given char ** pointers to a
292 * malloc(3)ed strings of the relevant section, and port to
293 * the number given, or ftpport if ftp://, or httpport if http://.
295 * XXX: this is not totally RFC 3986 compliant; <path> will have the
296 * leading `/' unless it's an ftp:// URL, as this makes things easier
297 * for file:// and http:// URLs. ftp:// URLs have the `/' between the
298 * host and the URL-path removed, but any additional leading slashes
299 * in the URL-path are retained (because they imply that we should
300 * later do "CWD" with a null argument).
303 * input URL output path
304 * --------- -----------
307 * "http://host/path" "/path"
308 * "file://host/dir/file" "dir/file"
312 * "ftp://host/dir/file" "dir/file"
313 * "ftp://host//dir/file" "/dir/file"
316 parse_url(const char *url, const char *desc, url_t *utype,
317 char **uuser, char **pass, char **host, char **port,
318 in_port_t *portnum, char **path)
320 const char *origurl, *tport;
321 char *cp, *ep, *thost;
324 if (url == NULL || desc == NULL || utype == NULL || uuser == NULL
325 || pass == NULL || host == NULL || port == NULL || portnum == NULL
327 errx(1, "parse_url: invoked with NULL argument!");
328 DPRINTF("parse_url: %s `%s'\n", desc, url);
331 *utype = UNKNOWN_URL_T;
332 *uuser = *pass = *host = *port = *path = NULL;
336 if (STRNEQUAL(url, HTTP_URL)) {
337 url += sizeof(HTTP_URL) - 1;
339 *portnum = HTTP_PORT;
341 } else if (STRNEQUAL(url, FTP_URL)) {
342 url += sizeof(FTP_URL) - 1;
346 } else if (STRNEQUAL(url, FILE_URL)) {
347 url += sizeof(FILE_URL) - 1;
350 warnx("Invalid %s `%s'", desc, url);
354 memset(*pass, 0, strlen(*pass));
365 /* find [user[:pass]@]host[:port] */
366 ep = strchr(url, '/');
368 thost = ftp_strdup(url);
371 thost = (char *)ftp_malloc(len + 1);
372 (void)strlcpy(thost, url, len + 1);
373 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
375 *path = ftp_strdup(ep);
378 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
380 if (*utype == FTP_URL_T)
381 anonftp = 0; /* disable anonftp */
384 thost = ftp_strdup(cp + 1);
385 cp = strchr(*uuser, ':');
388 *pass = ftp_strdup(cp + 1);
397 * Check if thost is an encoded IPv6 address, as per
399 * `[' ipv6-address ']'
403 if ((ep = strchr(cp, ']')) == NULL ||
404 (ep[1] != '\0' && ep[1] != ':')) {
405 warnx("Invalid address `%s' in %s `%s'",
406 thost, desc, origurl);
407 goto cleanup_parse_url;
409 len = ep - cp; /* change `[xyz]' -> `xyz' */
410 memmove(thost, thost + 1, len);
412 if (! isipv6addr(thost)) {
413 warnx("Invalid IPv6 address `%s' in %s `%s'",
414 thost, desc, origurl);
415 goto cleanup_parse_url;
424 if ((cp = strchr(thost, ':')) != NULL)
428 /* look for [:port] */
432 nport = strtoul(cp, &ep, 10);
433 if (*cp == '\0' || *ep != '\0' ||
434 nport < 1 || nport > MAX_IN_PORT_T) {
435 warnx("Unknown port `%s' in %s `%s'",
437 goto cleanup_parse_url;
444 *port = ftp_strdup(tport);
446 const char *emptypath = "/";
447 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
449 *path = ftp_strdup(emptypath);
452 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
454 STRorNULL(*uuser), STRorNULL(*pass),
455 STRorNULL(*host), STRorNULL(*port),
456 *portnum ? *portnum : -1, STRorNULL(*path));
461 sigjmp_buf httpabort;
464 * Retrieve URL, via a proxy if necessary, using HTTP.
465 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
466 * http_proxy as appropriate.
467 * Supports HTTP redirects.
468 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
469 * is still open (e.g, ftp xfer with trailing /)
472 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
474 struct addrinfo hints, *res, *res0 = NULL;
476 sigfunc volatile oldintr;
477 sigfunc volatile oldintp;
480 int volatile ischunked;
481 int volatile isproxy;
486 static size_t bufsize;
487 static char *xferbuf;
488 const char *cp, *token;
491 const char *errormsg;
492 char *volatile savefile;
494 char *volatile location;
495 char *volatile message;
496 char *uuser, *pass, *host, *port, *path;
497 char *volatile decodedpath;
498 char *puser, *ppass, *useragent;
499 off_t hashbytes, rangestart, rangeend, entitylen;
500 int (*volatile closefunc)(FILE *);
507 DPRINTF("fetch_url: `%s' proxyenv `%s'\n", url, STRorNULL(proxyenv));
509 oldintr = oldintp = NULL;
514 auth = location = message = NULL;
515 ischunked = isproxy = hcode = 0;
517 uuser = pass = host = path = decodedpath = puser = ppass = NULL;
519 if (parse_url(url, "URL", &urltype, &uuser, &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 DPRINTF("fetch_url: savefile `%s'\n", savefile);
553 if (EMPTYSTRING(savefile)) {
554 if (urltype == FTP_URL_T) {
555 rval = fetch_ftp(url);
556 goto cleanup_fetch_url;
558 warnx("No file after directory (you must specify an "
559 "output file) `%s'", url);
560 goto cleanup_fetch_url;
565 rangestart = rangeend = entitylen = -1;
567 if (restartautofetch) {
568 if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
569 stat(savefile, &sb) == 0)
570 restart_point = sb.st_size;
572 if (urltype == FILE_URL_T) { /* file:// URLs */
573 direction = "copied";
574 fin = fopen(decodedpath, "r");
576 warn("Can't open `%s'", decodedpath);
577 goto cleanup_fetch_url;
579 if (fstat(fileno(fin), &sb) == 0) {
581 filesize = sb.st_size;
584 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
585 warn("Can't seek to restart `%s'",
587 goto cleanup_fetch_url;
591 fprintf(ttyout, "Copying %s", decodedpath);
593 fprintf(ttyout, " (restarting at " LLF ")",
597 } else { /* ftp:// or http:// URLs */
601 if (proxyenv == NULL) {
602 if (urltype == HTTP_URL_T)
603 proxyenv = getoptionvalue("http_proxy");
604 else if (urltype == FTP_URL_T)
605 proxyenv = getoptionvalue("ftp_proxy");
607 direction = "retrieved";
608 if (! EMPTYSTRING(proxyenv)) { /* use proxy */
611 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;
620 unsigned long np_port;
623 np_iter = np_copy = ftp_strdup(no_proxy);
625 while ((cp = strsep(&np_iter, " ,")) != NULL) {
628 if ((np = strrchr(cp, ':')) != NULL) {
630 np_port = strtoul(np, &ep, 10);
631 if (*np == '\0' || *ep != '\0')
633 if (np_port != portnum)
639 if (strncasecmp(host + hlen - plen,
646 if (isproxy == 0 && urltype == FTP_URL_T) {
647 rval = fetch_ftp(url);
648 goto cleanup_fetch_url;
654 warnx("Can't restart via proxy URL `%s'",
656 goto cleanup_fetch_url;
658 if (parse_url(proxyenv, "proxy URL", &purltype,
659 &puser, &ppass, &phost, &pport, &pportnum,
661 goto cleanup_fetch_url;
663 if ((purltype != HTTP_URL_T
664 && purltype != FTP_URL_T) ||
665 EMPTYSTRING(phost) ||
666 (! EMPTYSTRING(ppath)
667 && strcmp(ppath, "/") != 0)) {
668 warnx("Malformed proxy URL `%s'",
673 goto cleanup_fetch_url;
675 if (isipv6addr(host) &&
676 strchr(host, '%') != NULL) {
678 "Scoped address notation `%s' disallowed via web proxy",
683 goto cleanup_fetch_url;
691 path = ftp_strdup(url);
694 } /* ! EMPTYSTRING(proxyenv) */
696 memset(&hints, 0, sizeof(hints));
698 hints.ai_family = family;
699 hints.ai_socktype = SOCK_STREAM;
700 hints.ai_protocol = 0;
701 error = getaddrinfo(host, port, &hints, &res0);
703 warnx("Can't lookup `%s:%s': %s", host, port,
704 (error == EAI_SYSTEM) ? strerror(errno)
705 : gai_strerror(error));
706 goto cleanup_fetch_url;
708 if (res0->ai_canonname)
709 host = res0->ai_canonname;
712 for (res = res0; res; res = res->ai_next) {
713 char hname[NI_MAXHOST], sname[NI_MAXSERV];
716 if (getnameinfo(res->ai_addr, res->ai_addrlen,
717 hname, sizeof(hname), sname, sizeof(sname),
718 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
719 strlcpy(hname, "?", sizeof(hname));
720 strlcpy(sname, "?", sizeof(sname));
723 if (verbose && res0->ai_next) {
724 fprintf(ttyout, "Trying %s:%s ...\n",
728 s = socket(res->ai_family, SOCK_STREAM,
732 "Can't create socket for connection to "
733 "`%s:%s'", hname, sname);
737 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
748 warnx("Can't connect to `%s:%s'", host, port);
749 goto cleanup_fetch_url;
752 fin = fdopen(s, "r+");
754 * Construct and send the request.
757 fprintf(ttyout, "Requesting %s\n", url);
762 fprintf(ttyout, "%svia %s:%s", leading,
767 fprintf(fin, "GET %s HTTP/1.0\r\n", path);
769 fprintf(fin, "Pragma: no-cache\r\n");
771 fprintf(fin, "GET %s HTTP/1.1\r\n", path);
772 if (strchr(host, ':')) {
776 * strip off IPv6 scope identifier, since it is
779 h = ftp_strdup(host);
781 (p = strchr(h, '%')) != NULL) {
784 fprintf(fin, "Host: [%s]", h);
787 fprintf(fin, "Host: %s", host);
788 if (portnum != HTTP_PORT)
789 fprintf(fin, ":%u", portnum);
790 fprintf(fin, "\r\n");
791 fprintf(fin, "Accept: */*\r\n");
792 fprintf(fin, "Connection: close\r\n");
794 fputs(leading, ttyout);
795 fprintf(fin, "Range: bytes=" LLF "-\r\n",
797 fprintf(ttyout, "restarting at " LLF,
803 fprintf(fin, "Cache-Control: no-cache\r\n");
805 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
806 fprintf(fin, "User-Agent: %s\r\n", useragent);
808 fprintf(fin, "User-Agent: %s/%s\r\n",
809 FTP_PRODUCT, FTP_VERSION);
813 fprintf(ttyout, "%swith authorization",
818 fprintf(fin, "Authorization: %s\r\n", wwwauth);
823 "%swith proxy authorization", leading);
827 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
829 if (verbose && hasleading)
830 fputs(")\n", ttyout);
831 fprintf(fin, "\r\n");
832 if (fflush(fin) == EOF) {
833 warn("Writing HTTP request");
834 goto cleanup_fetch_url;
837 /* Read the response */
838 len = get_line(fin, buf, sizeof(buf), &errormsg);
840 if (*errormsg == '\n')
842 warnx("Receiving HTTP reply: %s", errormsg);
843 goto cleanup_fetch_url;
845 while (len > 0 && (ISLWS(buf[len-1])))
847 DPRINTF("fetch_url: received `%s'\n", buf);
849 /* Determine HTTP response code */
850 cp = strchr(buf, ' ');
855 hcode = strtol(cp, &ep, 10);
856 if (*ep != '\0' && !isspace((unsigned char)*ep))
858 message = ftp_strdup(cp);
860 /* Read the rest of the header. */
862 len = get_line(fin, buf, sizeof(buf), &errormsg);
864 if (*errormsg == '\n')
866 warnx("Receiving HTTP reply: %s", errormsg);
867 goto cleanup_fetch_url;
869 while (len > 0 && (ISLWS(buf[len-1])))
873 DPRINTF("fetch_url: received `%s'\n", buf);
876 * Look for some headers
881 if (match_token(&cp, "Content-Length:")) {
882 filesize = STRTOLL(cp, &ep, 10);
883 if (filesize < 0 || *ep != '\0')
885 DPRINTF("fetch_url: parsed len as: " LLF "\n",
888 } else if (match_token(&cp, "Content-Range:")) {
889 if (! match_token(&cp, "bytes"))
895 rangestart = STRTOLL(cp, &ep, 10);
896 if (rangestart < 0 || *ep != '-')
899 rangeend = STRTOLL(cp, &ep, 10);
900 if (rangeend < 0 || rangeend < rangestart)
910 entitylen = STRTOLL(cp, &ep, 10);
920 fprintf(ttyout, "parsed range as: ");
921 if (rangestart == -1)
922 fprintf(ttyout, "*");
924 fprintf(ttyout, LLF "-" LLF,
927 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
930 if (! restart_point) {
932 "Received unexpected Content-Range header");
933 goto cleanup_fetch_url;
936 } else if (match_token(&cp, "Last-Modified:")) {
940 memset(&parsed, 0, sizeof(parsed));
941 t = parse_rfc2616time(&parsed, cp);
943 parsed.tm_isdst = -1;
945 mtime = timegm(&parsed);
947 if (ftp_debug && mtime != -1) {
949 "parsed time as: %s",
950 rfc2822time(localtime(&mtime)));
955 } else if (match_token(&cp, "Location:")) {
956 location = ftp_strdup(cp);
957 DPRINTF("fetch_url: parsed location as `%s'\n",
960 } else if (match_token(&cp, "Transfer-Encoding:")) {
961 if (match_token(&cp, "binary")) {
963 "Bogus transfer encoding `binary' (fetching anyway)");
966 if (! (token = match_token(&cp, "chunked"))) {
968 "Unsupported transfer encoding `%s'",
970 goto cleanup_fetch_url;
973 DPRINTF("fetch_url: using chunked encoding\n");
975 } else if (match_token(&cp, "Proxy-Authenticate:")
976 || match_token(&cp, "WWW-Authenticate:")) {
977 if (! (token = match_token(&cp, "Basic"))) {
979 "fetch_url: skipping unknown auth scheme `%s'\n",
984 auth = ftp_strdup(token);
985 DPRINTF("fetch_url: parsed auth as `%s'\n", cp);
989 /* finished parsing header */
995 if (! restart_point) {
996 warnx("Not expecting partial content header");
997 goto cleanup_fetch_url;
1006 if (EMPTYSTRING(location)) {
1008 "No redirection Location provided by server");
1009 goto cleanup_fetch_url;
1011 if (redirect_loop++ > 5) {
1012 warnx("Too many redirections requested");
1013 goto cleanup_fetch_url;
1017 fprintf(ttyout, "Redirected via %s\n",
1019 rval = fetch_url(url, location,
1020 proxyauth, wwwauth);
1023 fprintf(ttyout, "Redirected to %s\n",
1025 rval = go_fetch(location);
1027 goto cleanup_fetch_url;
1033 char *auser, *apass;
1044 if (verbose || *authp == NULL ||
1045 auser == NULL || apass == NULL)
1046 fprintf(ttyout, "%s\n", message);
1047 if (EMPTYSTRING(auth)) {
1049 "No authentication challenge provided by server");
1050 goto cleanup_fetch_url;
1052 if (*authp != NULL) {
1056 "Authorization failed. Retry (y/n)? ");
1057 if (get_line(stdin, reply, sizeof(reply), NULL)
1059 goto cleanup_fetch_url;
1061 if (tolower((unsigned char)reply[0]) != 'y')
1062 goto cleanup_fetch_url;
1066 if (auth_url(auth, authp, auser, apass) == 0) {
1067 rval = fetch_url(url, proxyenv,
1068 proxyauth, wwwauth);
1069 memset(*authp, 0, strlen(*authp));
1072 goto cleanup_fetch_url;
1077 warnx("Error retrieving file `%s'", message);
1079 warnx("Unknown error retrieving file");
1080 goto cleanup_fetch_url;
1082 } /* end of ftp:// or http:// specific setup */
1084 /* Open the output file. */
1085 if (strcmp(savefile, "-") == 0) {
1087 } else if (*savefile == '|') {
1088 oldintp = xsignal(SIGPIPE, SIG_IGN);
1089 fout = popen(savefile + 1, "w");
1091 warn("Can't execute `%s'", savefile + 1);
1092 goto cleanup_fetch_url;
1096 if ((rangeend != -1 && rangeend <= restart_point) ||
1097 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1100 fprintf(ttyout, "already done\n");
1102 goto cleanup_fetch_url;
1104 if (restart_point && rangestart != -1) {
1105 if (entitylen != -1)
1106 filesize = entitylen;
1107 if (rangestart != restart_point) {
1109 "Size of `%s' differs from save file `%s'",
1111 goto cleanup_fetch_url;
1113 fout = fopen(savefile, "a");
1115 fout = fopen(savefile, "w");
1117 warn("Can't open `%s'", savefile);
1118 goto cleanup_fetch_url;
1124 if (sigsetjmp(httpabort, 1))
1125 goto cleanup_fetch_url;
1126 (void)xsignal(SIGQUIT, psummary);
1127 oldintr = xsignal(SIGINT, aborthttp);
1129 if ((size_t)rcvbuf_size > bufsize) {
1131 (void)free(xferbuf);
1132 bufsize = rcvbuf_size;
1133 xferbuf = ftp_malloc(bufsize);
1140 /* Finally, suck down the file. */
1147 /* read chunk-size */
1149 if (fgets(xferbuf, bufsize, fin) == NULL) {
1150 warnx("Unexpected EOF reading chunk-size");
1151 goto cleanup_fetch_url;
1154 chunksize = strtol(xferbuf, &ep, 16);
1155 if (ep == xferbuf) {
1156 warnx("Invalid chunk-size");
1157 goto cleanup_fetch_url;
1159 if (errno == ERANGE || chunksize < 0) {
1161 warn("Chunk-size `%.*s'",
1162 (int)(ep-xferbuf), xferbuf);
1163 goto cleanup_fetch_url;
1167 * XXX: Work around bug in Apache 1.3.9 and
1168 * 1.3.11, which incorrectly put trailing
1169 * space after the chunk-size.
1174 /* skip [ chunk-ext ] */
1176 while (*ep && *ep != '\r')
1180 if (strcmp(ep, "\r\n") != 0) {
1181 warnx("Unexpected data following chunk-size");
1182 goto cleanup_fetch_url;
1184 DPRINTF("fetch_url: got chunk-size of " LLF "\n",
1186 if (chunksize == 0) {
1191 /* transfer file or chunk */
1193 struct timeval then, now, td;
1197 (void)gettimeofday(&then, NULL);
1198 bufrem = rate_get ? rate_get : (off_t)bufsize;
1200 bufrem = MIN(chunksize, bufrem);
1201 while (bufrem > 0) {
1202 flen = fread(xferbuf, sizeof(char),
1203 MIN((off_t)bufsize, bufrem), fin);
1208 if (fwrite(xferbuf, sizeof(char), flen, fout)
1210 warn("Writing `%s'", savefile);
1211 goto cleanup_fetch_url;
1213 if (hash && !progress) {
1214 while (bytes >= hashbytes) {
1215 (void)putc('#', ttyout);
1218 (void)fflush(ttyout);
1228 (void)gettimeofday(&now, NULL);
1229 timersub(&now, &then, &td);
1232 usleep(1000000 - td.tv_usec);
1235 if (ischunked && chunksize <= 0)
1238 /* read CRLF after chunk*/
1241 if (fgets(xferbuf, bufsize, fin) == NULL) {
1242 warnx("Unexpected EOF reading chunk CRLF");
1243 goto cleanup_fetch_url;
1245 if (strcmp(xferbuf, "\r\n") != 0) {
1246 warnx("Unexpected data following chunk");
1247 goto cleanup_fetch_url;
1252 } while (ischunked);
1254 /* XXX: deal with optional trailer & CRLF here? */
1256 if (hash && !progress && bytes > 0) {
1258 (void)putc('#', ttyout);
1259 (void)putc('\n', ttyout);
1262 warn("Reading file");
1263 goto cleanup_fetch_url;
1267 if (closefunc == fclose && mtime != -1) {
1268 struct timeval tval[2];
1270 (void)gettimeofday(&tval[0], NULL);
1271 tval[1].tv_sec = mtime;
1272 tval[1].tv_usec = 0;
1276 if (utimes(savefile, tval) == -1) {
1278 "Can't change modification time to %s",
1279 rfc2822time(localtime(&mtime)));
1287 goto cleanup_fetch_url;
1290 warnx("Improper response from `%s:%s'", host, port);
1294 (void)xsignal(SIGINT, oldintr);
1296 (void)xsignal(SIGPIPE, oldintp);
1301 if (closefunc != NULL && fout != NULL)
1308 memset(pass, 0, strlen(pass));
1313 FREEPTR(decodedpath);
1316 memset(ppass, 0, strlen(ppass));
1325 * Abort a HTTP retrieval
1328 aborthttp(int notused)
1335 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1336 write(fileno(ttyout), msgbuf, len);
1337 siglongjmp(httpabort, 1);
1341 * Retrieve ftp URL or classic ftp argument using FTP.
1342 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1343 * is still open (e.g, ftp xfer with trailing /)
1346 fetch_ftp(const char *url)
1348 char *cp, *xargv[5], rempath[MAXPATHLEN];
1349 char *host, *path, *dir, *file, *uuser, *pass;
1351 char cmdbuf[MAXPATHLEN];
1353 int dirhasglob, filehasglob, rval, transtype, xargc;
1354 int oanonftp, oautologin;
1358 DPRINTF("fetch_ftp: `%s'\n", url);
1359 host = path = dir = file = uuser = pass = NULL;
1364 if (STRNEQUAL(url, FTP_URL)) {
1365 if ((parse_url(url, "URL", &urltype, &uuser, &pass,
1366 &host, &port, &portnum, &path) == -1) ||
1367 (uuser != NULL && *uuser == '\0') ||
1368 EMPTYSTRING(host)) {
1369 warnx("Invalid URL `%s'", url);
1370 goto cleanup_fetch_ftp;
1373 * Note: Don't url_decode(path) here. We need to keep the
1374 * distinction between "/" and "%2F" until later.
1377 /* check for trailing ';type=[aid]' */
1378 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1379 if (strcasecmp(cp, ";type=a") == 0)
1381 else if (strcasecmp(cp, ";type=i") == 0)
1383 else if (strcasecmp(cp, ";type=d") == 0) {
1385 "Directory listing via a URL is not supported");
1386 goto cleanup_fetch_ftp;
1388 warnx("Invalid suffix `%s' in URL `%s'", cp,
1390 goto cleanup_fetch_ftp;
1394 } else { /* classic style `[user@]host:[file]' */
1395 urltype = CLASSIC_URL_T;
1396 host = ftp_strdup(url);
1397 cp = strchr(host, '@');
1401 anonftp = 0; /* disable anonftp */
1402 host = ftp_strdup(cp + 1);
1404 cp = strchr(host, ':');
1407 path = ftp_strdup(cp + 1);
1410 if (EMPTYSTRING(host))
1411 goto cleanup_fetch_ftp;
1413 /* Extract the file and (if present) directory name. */
1415 if (! EMPTYSTRING(dir)) {
1417 * If we are dealing with classic `[user@]host:[path]' syntax,
1418 * then a path of the form `/file' (resulting from input of the
1419 * form `host:/file') means that we should do "CWD /" before
1420 * retrieving the file. So we set dir="/" and file="file".
1422 * But if we are dealing with URLs like `ftp://host/path' then
1423 * a path of the form `/file' (resulting from a URL of the form
1424 * `ftp://host//file') means that we should do `CWD ' (with an
1425 * empty argument) before retrieving the file. So we set
1426 * dir="" and file="file".
1428 * If the path does not contain / at all, we set dir=NULL.
1429 * (We get a path without any slashes if we are dealing with
1430 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1432 * In all other cases, we set dir to a string that does not
1433 * include the final '/' that separates the dir part from the
1434 * file part of the path. (This will be the empty string if
1435 * and only if we are dealing with a path of the form `/file'
1436 * resulting from an URL of the form `ftp://host//file'.)
1438 cp = strrchr(dir, '/');
1439 if (cp == dir && urltype == CLASSIC_URL_T) {
1441 (void)strlcpy(dirbuf, "/", sizeof(dirbuf));
1443 } else if (cp != NULL) {
1452 if (urltype == FTP_URL_T && file != NULL) {
1454 /* but still don't url_decode(dir) */
1456 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1457 "path `%s' dir `%s' file `%s'\n",
1458 STRorNULL(uuser), STRorNULL(pass),
1459 STRorNULL(host), STRorNULL(port),
1460 STRorNULL(path), STRorNULL(dir), STRorNULL(file));
1462 dirhasglob = filehasglob = 0;
1463 if (doglob && urltype == CLASSIC_URL_T) {
1464 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1466 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1470 /* Set up the connection */
1473 disconnect(0, NULL);
1475 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf));
1485 oautologin = autologin;
1486 /* don't autologin in setpeer(), use ftp_login() below */
1488 setpeer(xargc, xargv);
1489 autologin = oautologin;
1490 if ((connected == 0) ||
1491 (connected == 1 && !ftp_login(host, uuser, pass))) {
1492 warnx("Can't connect or login to host `%s:%s'",
1493 host, port ? port : "?");
1494 goto cleanup_fetch_ftp;
1497 switch (transtype) {
1502 setbinary(1, xargv);
1505 errx(1, "fetch_ftp: unknown transfer type %d", transtype);
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 RFC 3986 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 RFC 3986 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("fetch_ftp: dir `%s', nextpart `%s'\n",
1588 STRorNULL(dir), STRorNULL(nextpart));
1589 if (urltype == FTP_URL_T || *dir != '\0') {
1590 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf));
1597 if (*dir == '\0' && code == 500)
1600 "ftp: The `CWD ' command (without a directory), which is required by\n"
1601 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n"
1602 " conflicts with the server's conformance to RFC 959.\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). */
1626 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf));
1630 if (dirhasglob || filehasglob) {
1633 ointeractive = interactive;
1635 if (restartautofetch)
1636 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf));
1638 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf));
1641 interactive = ointeractive;
1643 if (outfile == NULL) {
1644 cp = strrchr(file, '/'); /* find savefile */
1650 xargv[2] = (char *)outfile;
1653 if (restartautofetch)
1654 reget(xargc, xargv);
1659 if ((code / 100) == COMPLETE)
1668 memset(pass, 0, strlen(pass));
1674 * Retrieve the given file to outfile.
1675 * Supports arguments of the form:
1676 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1678 * "http://host/path" call fetch_url() to use HTTP
1679 * "file:///path" call fetch_url() to copy
1680 * "about:..." print a message
1682 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1683 * is still open (e.g, ftp xfer with trailing /)
1686 go_fetch(const char *url)
1694 if (STRNEQUAL(url, ABOUT_URL)) {
1695 url += sizeof(ABOUT_URL) -1;
1696 if (strcasecmp(url, "ftp") == 0 ||
1697 strcasecmp(url, "tnftp") == 0) {
1699 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1700 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1701 } else if (strcasecmp(url, "lukem") == 0) {
1703 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1704 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1705 } else if (strcasecmp(url, "netbsd") == 0) {
1707 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1708 "For more information, see http://www.NetBSD.org/\n", ttyout);
1709 } else if (strcasecmp(url, "version") == 0) {
1710 fprintf(ttyout, "Version: %s %s%s\n",
1711 FTP_PRODUCT, FTP_VERSION,
1719 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1721 fputs("\n", ttyout);
1727 * Check for file:// and http:// URLs.
1729 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1730 return (fetch_url(url, NULL, NULL, NULL));
1733 * Try FTP URL-style and host:file arguments next.
1734 * If ftpproxy is set with an FTP URL, use fetch_url()
1735 * Othewise, use fetch_ftp().
1737 proxyenv = getoptionvalue("ftp_proxy");
1738 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL))
1739 return (fetch_url(url, NULL, NULL, NULL));
1741 return (fetch_ftp(url));
1745 * Retrieve multiple files from the command line,
1746 * calling go_fetch() for each file.
1748 * If an ftp path has a trailing "/", the path will be cd-ed into and
1749 * the connection remains open, and the function will return -1
1750 * (to indicate the connection is alive).
1751 * If an error occurs the return value will be the offset+1 in
1752 * argv[] of the file that caused a problem (i.e, argv[x]
1754 * Otherwise, 0 is returned if all files retrieved successfully.
1757 auto_fetch(int argc, char *argv[])
1759 volatile int argpos, rval;
1763 if (sigsetjmp(toplevel, 1)) {
1765 disconnect(0, NULL);
1770 (void)xsignal(SIGINT, intr);
1771 (void)xsignal(SIGPIPE, lostpeer);
1774 * Loop through as long as there's files to fetch.
1776 for (; (rval == 0) && (argpos < argc); argpos++) {
1777 if (strchr(argv[argpos], ':') == NULL)
1781 anonftp = 2; /* Handle "automatic" transfers. */
1782 rval = go_fetch(argv[argpos]);
1783 if (outfile != NULL && strcmp(outfile, "-") != 0
1784 && outfile[0] != '|')
1790 if (connected && rval != -1)
1791 disconnect(0, NULL);
1797 * Upload multiple files from the command line.
1799 * If an error occurs the return value will be the offset+1 in
1800 * argv[] of the file that caused a problem (i.e, argv[x]
1802 * Otherwise, 0 is returned if all files uploaded successfully.
1805 auto_put(int argc, char **argv, const char *uploadserver)
1807 char *uargv[4], *path, *pathsep;
1808 int uargc, rval, argpos;
1810 char cmdbuf[MAX_C_NAME];
1812 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf));
1816 uargv[2] = uargv[3] = NULL;
1820 DPRINTF("auto_put: target `%s'\n", uploadserver);
1822 path = ftp_strdup(uploadserver);
1824 if (path[len - 1] != '/' && path[len - 1] != ':') {
1826 * make sure we always pass a directory to auto_fetch
1828 if (argc > 1) { /* more than one file to upload */
1829 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1831 path = (char *)ftp_malloc(len);
1832 (void)strlcpy(path, uploadserver, len);
1833 (void)strlcat(path, "/", len);
1834 } else { /* single file to upload */
1835 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf));
1837 pathsep = strrchr(path, '/');
1838 if (pathsep == NULL) {
1839 pathsep = strrchr(path, ':');
1840 if (pathsep == NULL) {
1841 warnx("Invalid URL `%s'", path);
1842 goto cleanup_auto_put;
1845 uargv[2] = ftp_strdup(pathsep);
1848 uargv[2] = ftp_strdup(pathsep + 1);
1853 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1854 path, STRorNULL(uargv[2]));
1856 /* connect and cwd */
1857 rval = auto_fetch(1, &path);
1859 goto cleanup_auto_put;
1863 /* target filename provided; upload 1 file */
1864 /* XXX : is this the best way? */
1868 if ((code / 100) != COMPLETE)
1870 } else { /* otherwise a target dir: upload all files to it */
1871 for(argpos = 0; argv[argpos] != NULL; argpos++) {
1872 uargv[1] = argv[argpos];
1874 if ((code / 100) != COMPLETE) {