1 /* $NetBSD: fetch.c,v 1.195 2011/12/10 05:53:58 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 1.195 2011/12/10 05:53:58 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>
79 __dead static void aborthttp(int);
81 static int auth_url(const char *, char **, const char *, const char *);
82 static void base64_encode(const unsigned char *, size_t, unsigned char *);
84 static int go_fetch(const char *);
85 static int fetch_ftp(const char *);
86 static int fetch_url(const char *, const char *, char *, char *);
87 static const char *match_token(const char **, const char *);
88 static int parse_url(const char *, const char *, url_t *, char **,
89 char **, char **, char **, in_port_t *, char **);
90 static void url_decode(char *);
92 static int redirect_loop;
95 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0)
96 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
97 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0)
100 #define ABOUT_URL "about:" /* propaganda */
101 #define FILE_URL "file://" /* file URL prefix */
102 #define FTP_URL "ftp://" /* ftp URL prefix */
103 #define HTTP_URL "http://" /* http URL prefix */
107 * Determine if token is the next word in buf (case insensitive).
108 * If so, advance buf past the token and any trailing LWS, and
109 * return a pointer to the token (in buf). Otherwise, return NULL.
110 * token may be preceded by LWS.
111 * token must be followed by LWS or NUL. (I.e, don't partial match).
114 match_token(const char **buf, const char *token)
116 const char *p, *orig;
119 tlen = strlen(token);
123 if (strncasecmp(p, token, tlen) != 0)
126 if (*p != '\0' && !ISLWS(*p))
136 * Generate authorization response based on given authentication challenge.
137 * Returns -1 if an error occurred, otherwise 0.
138 * Sets response to a malloc(3)ed string; caller should free.
141 auth_url(const char *challenge, char **response, const char *guser,
144 const char *cp, *scheme, *errormsg;
145 char *ep, *clear, *realm;
146 char uuser[BUFSIZ], *gotpass;
149 size_t len, clen, rlen;
152 clear = realm = NULL;
155 scheme = "Basic"; /* only support Basic authentication */
158 DPRINTF("auth_url: challenge `%s'\n", challenge);
160 if (! match_token(&cp, scheme)) {
161 warnx("Unsupported authentication challenge `%s'",
163 goto cleanup_auth_url;
166 #define REALM "realm=\""
167 if (STRNEQUAL(cp, REALM))
168 cp += sizeof(REALM) - 1;
170 warnx("Unsupported authentication challenge `%s'",
172 goto cleanup_auth_url;
174 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
175 if ((ep = strchr(cp, '\"')) != NULL) {
177 realm = (char *)ftp_malloc(len + 1);
178 (void)strlcpy(realm, cp, len + 1);
180 warnx("Unsupported authentication challenge `%s'",
182 goto cleanup_auth_url;
185 fprintf(ttyout, "Username for `%s': ", realm);
187 (void)strlcpy(uuser, guser, sizeof(uuser));
188 fprintf(ttyout, "%s\n", uuser);
190 (void)fflush(ttyout);
191 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) {
192 warnx("%s; can't authenticate", errormsg);
193 goto cleanup_auth_url;
199 gotpass = getpass("Password: ");
200 if (gotpass == NULL) {
201 warnx("Can't read password");
202 goto cleanup_auth_url;
207 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */
208 clear = (char *)ftp_malloc(clen);
209 (void)strlcpy(clear, uuser, clen);
210 (void)strlcat(clear, ":", clen);
211 (void)strlcat(clear, upass, clen);
213 memset(gotpass, 0, strlen(gotpass));
215 /* scheme + " " + enc + "\0" */
216 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
217 *response = (char *)ftp_malloc(rlen);
218 (void)strlcpy(*response, scheme, rlen);
219 len = strlcat(*response, " ", rlen);
220 /* use `clen - 1' to not encode the trailing NUL */
221 base64_encode((unsigned char *)clear, clen - 1,
222 (unsigned char *)*response + len);
223 memset(clear, 0, clen);
233 * Encode len bytes starting at clear using base64 encoding into encoded,
234 * which should be at least ((len + 2) * 4 / 3 + 1) in size.
237 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
239 static const unsigned char enc[] =
240 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
245 for (i = 0; i < len; i += 3) {
246 *(cp++) = enc[((clear[i + 0] >> 2))];
247 *(cp++) = enc[((clear[i + 0] << 4) & 0x30)
248 | ((clear[i + 1] >> 4) & 0x0f)];
249 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
250 | ((clear[i + 2] >> 6) & 0x03)];
251 *(cp++) = enc[((clear[i + 2] ) & 0x3f)];
260 * Decode %xx escapes in given string, `in-place'.
263 url_decode(char *url)
265 unsigned char *p, *q;
267 if (EMPTYSTRING(url))
269 p = q = (unsigned char *)url;
271 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
274 && p[1] && isxdigit((unsigned char)p[1])
275 && p[2] && isxdigit((unsigned char)p[2])) {
276 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
286 * Parse URL of form (per RFC 3986):
287 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
288 * Returns -1 if a parse error occurred, otherwise 0.
289 * It's the caller's responsibility to url_decode() the returned
290 * user, pass and path.
292 * Sets type to url_t, each of the given char ** pointers to a
293 * malloc(3)ed strings of the relevant section, and port to
294 * the number given, or ftpport if ftp://, or httpport if http://.
296 * XXX: this is not totally RFC 3986 compliant; <path> will have the
297 * leading `/' unless it's an ftp:// URL, as this makes things easier
298 * for file:// and http:// URLs. ftp:// URLs have the `/' between the
299 * host and the URL-path removed, but any additional leading slashes
300 * in the URL-path are retained (because they imply that we should
301 * later do "CWD" with a null argument).
304 * input URL output path
305 * --------- -----------
308 * "http://host/path" "/path"
309 * "file://host/dir/file" "dir/file"
313 * "ftp://host/dir/file" "dir/file"
314 * "ftp://host//dir/file" "/dir/file"
317 parse_url(const char *url, const char *desc, url_t *utype,
318 char **uuser, char **pass, char **host, char **port,
319 in_port_t *portnum, char **path)
321 const char *origurl, *tport;
322 char *cp, *ep, *thost;
325 if (url == NULL || desc == NULL || utype == NULL || uuser == NULL
326 || pass == NULL || host == NULL || port == NULL || portnum == NULL
328 errx(1, "parse_url: invoked with NULL argument!");
329 DPRINTF("parse_url: %s `%s'\n", desc, url);
332 *utype = UNKNOWN_URL_T;
333 *uuser = *pass = *host = *port = *path = NULL;
337 if (STRNEQUAL(url, HTTP_URL)) {
338 url += sizeof(HTTP_URL) - 1;
340 *portnum = HTTP_PORT;
342 } else if (STRNEQUAL(url, FTP_URL)) {
343 url += sizeof(FTP_URL) - 1;
347 } else if (STRNEQUAL(url, FILE_URL)) {
348 url += sizeof(FILE_URL) - 1;
351 warnx("Invalid %s `%s'", desc, url);
355 memset(*pass, 0, strlen(*pass));
366 /* find [user[:pass]@]host[:port] */
367 ep = strchr(url, '/');
369 thost = ftp_strdup(url);
372 thost = (char *)ftp_malloc(len + 1);
373 (void)strlcpy(thost, url, len + 1);
374 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
376 *path = ftp_strdup(ep);
379 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
381 if (*utype == FTP_URL_T)
382 anonftp = 0; /* disable anonftp */
385 thost = ftp_strdup(cp + 1);
386 cp = strchr(*uuser, ':');
389 *pass = ftp_strdup(cp + 1);
398 * Check if thost is an encoded IPv6 address, as per
400 * `[' ipv6-address ']'
404 if ((ep = strchr(cp, ']')) == NULL ||
405 (ep[1] != '\0' && ep[1] != ':')) {
406 warnx("Invalid address `%s' in %s `%s'",
407 thost, desc, origurl);
408 goto cleanup_parse_url;
410 len = ep - cp; /* change `[xyz]' -> `xyz' */
411 memmove(thost, thost + 1, len);
413 if (! isipv6addr(thost)) {
414 warnx("Invalid IPv6 address `%s' in %s `%s'",
415 thost, desc, origurl);
416 goto cleanup_parse_url;
425 if ((cp = strchr(thost, ':')) != NULL)
429 /* look for [:port] */
433 nport = strtoul(cp, &ep, 10);
434 if (*cp == '\0' || *ep != '\0' ||
435 nport < 1 || nport > MAX_IN_PORT_T) {
436 warnx("Unknown port `%s' in %s `%s'",
438 goto cleanup_parse_url;
445 *port = ftp_strdup(tport);
447 const char *emptypath = "/";
448 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
450 *path = ftp_strdup(emptypath);
453 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
455 STRorNULL(*uuser), STRorNULL(*pass),
456 STRorNULL(*host), STRorNULL(*port),
457 *portnum ? *portnum : -1, STRorNULL(*path));
462 sigjmp_buf httpabort;
465 * Retrieve URL, via a proxy if necessary, using HTTP.
466 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
467 * http_proxy as appropriate.
468 * Supports HTTP redirects.
469 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
470 * is still open (e.g, ftp xfer with trailing /)
473 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
475 struct addrinfo hints, *res, *res0 = NULL;
477 sigfunc volatile oldintr;
478 sigfunc volatile oldintp;
481 int volatile ischunked;
482 int volatile isproxy;
487 static size_t bufsize;
488 static char *xferbuf;
489 const char *cp, *token;
492 const char *errormsg;
493 char *volatile savefile;
495 char *volatile location;
496 char *volatile message;
497 char *uuser, *pass, *host, *port, *path;
498 char *volatile decodedpath;
499 char *puser, *ppass, *useragent;
500 off_t hashbytes, rangestart, rangeend, entitylen;
501 int (*volatile closefunc)(FILE *);
508 DPRINTF("fetch_url: `%s' proxyenv `%s'\n", url, STRorNULL(proxyenv));
510 oldintr = oldintp = NULL;
515 auth = location = message = NULL;
516 ischunked = isproxy = hcode = 0;
518 uuser = pass = host = path = decodedpath = puser = ppass = NULL;
520 if (parse_url(url, "URL", &urltype, &uuser, &pass, &host, &port,
521 &portnum, &path) == -1)
522 goto cleanup_fetch_url;
524 if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
525 && strcasecmp(host, "localhost") != 0) {
526 warnx("No support for non local file URL `%s'", url);
527 goto cleanup_fetch_url;
530 if (EMPTYSTRING(path)) {
531 if (urltype == FTP_URL_T) {
532 rval = fetch_ftp(url);
533 goto cleanup_fetch_url;
535 if (urltype != HTTP_URL_T || outfile == NULL) {
536 warnx("Invalid URL (no file after host) `%s'", url);
537 goto cleanup_fetch_url;
541 decodedpath = ftp_strdup(path);
542 url_decode(decodedpath);
545 savefile = ftp_strdup(outfile);
547 cp = strrchr(decodedpath, '/'); /* find savefile */
549 savefile = ftp_strdup(cp + 1);
551 savefile = ftp_strdup(decodedpath);
553 DPRINTF("fetch_url: savefile `%s'\n", savefile);
554 if (EMPTYSTRING(savefile)) {
555 if (urltype == FTP_URL_T) {
556 rval = fetch_ftp(url);
557 goto cleanup_fetch_url;
559 warnx("No file after directory (you must specify an "
560 "output file) `%s'", url);
561 goto cleanup_fetch_url;
566 rangestart = rangeend = entitylen = -1;
568 if (restartautofetch) {
569 if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
570 stat(savefile, &sb) == 0)
571 restart_point = sb.st_size;
573 if (urltype == FILE_URL_T) { /* file:// URLs */
574 direction = "copied";
575 fin = fopen(decodedpath, "r");
577 warn("Can't open `%s'", decodedpath);
578 goto cleanup_fetch_url;
580 if (fstat(fileno(fin), &sb) == 0) {
582 filesize = sb.st_size;
585 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
586 warn("Can't seek to restart `%s'",
588 goto cleanup_fetch_url;
592 fprintf(ttyout, "Copying %s", decodedpath);
594 fprintf(ttyout, " (restarting at " LLF ")",
598 } else { /* ftp:// or http:// URLs */
602 if (proxyenv == NULL) {
603 if (urltype == HTTP_URL_T)
604 proxyenv = getoptionvalue("http_proxy");
605 else if (urltype == FTP_URL_T)
606 proxyenv = getoptionvalue("ftp_proxy");
608 direction = "retrieved";
609 if (! EMPTYSTRING(proxyenv)) { /* use proxy */
612 char *pport, *no_proxy;
617 /* check URL against list of no_proxied sites */
618 no_proxy = getoptionvalue("no_proxy");
619 if (! EMPTYSTRING(no_proxy)) {
620 char *np, *np_copy, *np_iter;
621 unsigned long np_port;
624 np_iter = np_copy = ftp_strdup(no_proxy);
626 while ((cp = strsep(&np_iter, " ,")) != NULL) {
629 if ((np = strrchr(cp, ':')) != NULL) {
631 np_port = strtoul(np, &ep, 10);
632 if (*np == '\0' || *ep != '\0')
634 if (np_port != portnum)
640 if (strncasecmp(host + hlen - plen,
647 if (isproxy == 0 && urltype == FTP_URL_T) {
648 rval = fetch_ftp(url);
649 goto cleanup_fetch_url;
655 warnx("Can't restart via proxy URL `%s'",
657 goto cleanup_fetch_url;
659 if (parse_url(proxyenv, "proxy URL", &purltype,
660 &puser, &ppass, &phost, &pport, &pportnum,
662 goto cleanup_fetch_url;
664 if ((purltype != HTTP_URL_T
665 && purltype != FTP_URL_T) ||
666 EMPTYSTRING(phost) ||
667 (! EMPTYSTRING(ppath)
668 && strcmp(ppath, "/") != 0)) {
669 warnx("Malformed proxy URL `%s'",
674 goto cleanup_fetch_url;
676 if (isipv6addr(host) &&
677 strchr(host, '%') != NULL) {
679 "Scoped address notation `%s' disallowed via web proxy",
684 goto cleanup_fetch_url;
692 path = ftp_strdup(url);
695 } /* ! EMPTYSTRING(proxyenv) */
697 memset(&hints, 0, sizeof(hints));
699 hints.ai_family = family;
700 hints.ai_socktype = SOCK_STREAM;
701 hints.ai_protocol = 0;
702 error = getaddrinfo(host, port, &hints, &res0);
704 warnx("Can't lookup `%s:%s': %s", host, port,
705 (error == EAI_SYSTEM) ? strerror(errno)
706 : gai_strerror(error));
707 goto cleanup_fetch_url;
709 if (res0->ai_canonname)
710 host = res0->ai_canonname;
713 for (res = res0; res; res = res->ai_next) {
714 char hname[NI_MAXHOST], sname[NI_MAXSERV];
717 if (getnameinfo(res->ai_addr, res->ai_addrlen,
718 hname, sizeof(hname), sname, sizeof(sname),
719 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
720 strlcpy(hname, "?", sizeof(hname));
721 strlcpy(sname, "?", sizeof(sname));
724 if (verbose && res0->ai_next) {
725 fprintf(ttyout, "Trying %s:%s ...\n",
729 s = socket(res->ai_family, SOCK_STREAM,
733 "Can't create socket for connection to "
734 "`%s:%s'", hname, sname);
738 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
749 warnx("Can't connect to `%s:%s'", host, port);
750 goto cleanup_fetch_url;
753 fin = fdopen(s, "r+");
755 * Construct and send the request.
758 fprintf(ttyout, "Requesting %s\n", url);
763 fprintf(ttyout, "%svia %s:%s", leading,
768 fprintf(fin, "GET %s HTTP/1.0\r\n", path);
770 fprintf(fin, "Pragma: no-cache\r\n");
772 fprintf(fin, "GET %s HTTP/1.1\r\n", path);
773 if (strchr(host, ':')) {
777 * strip off IPv6 scope identifier, since it is
780 h = ftp_strdup(host);
782 (p = strchr(h, '%')) != NULL) {
785 fprintf(fin, "Host: [%s]", h);
788 fprintf(fin, "Host: %s", host);
789 if (portnum != HTTP_PORT)
790 fprintf(fin, ":%u", portnum);
791 fprintf(fin, "\r\n");
792 fprintf(fin, "Accept: */*\r\n");
793 fprintf(fin, "Connection: close\r\n");
795 fputs(leading, ttyout);
796 fprintf(fin, "Range: bytes=" LLF "-\r\n",
798 fprintf(ttyout, "restarting at " LLF,
804 fprintf(fin, "Cache-Control: no-cache\r\n");
806 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
807 fprintf(fin, "User-Agent: %s\r\n", useragent);
809 fprintf(fin, "User-Agent: %s/%s\r\n",
810 FTP_PRODUCT, FTP_VERSION);
814 fprintf(ttyout, "%swith authorization",
819 fprintf(fin, "Authorization: %s\r\n", wwwauth);
824 "%swith proxy authorization", leading);
828 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
830 if (verbose && hasleading)
831 fputs(")\n", ttyout);
832 fprintf(fin, "\r\n");
833 if (fflush(fin) == EOF) {
834 warn("Writing HTTP request");
835 goto cleanup_fetch_url;
838 /* Read the response */
839 len = get_line(fin, buf, sizeof(buf), &errormsg);
841 if (*errormsg == '\n')
843 warnx("Receiving HTTP reply: %s", errormsg);
844 goto cleanup_fetch_url;
846 while (len > 0 && (ISLWS(buf[len-1])))
848 DPRINTF("fetch_url: received `%s'\n", buf);
850 /* Determine HTTP response code */
851 cp = strchr(buf, ' ');
856 hcode = strtol(cp, &ep, 10);
857 if (*ep != '\0' && !isspace((unsigned char)*ep))
859 message = ftp_strdup(cp);
861 /* Read the rest of the header. */
863 len = get_line(fin, buf, sizeof(buf), &errormsg);
865 if (*errormsg == '\n')
867 warnx("Receiving HTTP reply: %s", errormsg);
868 goto cleanup_fetch_url;
870 while (len > 0 && (ISLWS(buf[len-1])))
874 DPRINTF("fetch_url: received `%s'\n", buf);
877 * Look for some headers
882 if (match_token(&cp, "Content-Length:")) {
883 filesize = STRTOLL(cp, &ep, 10);
884 if (filesize < 0 || *ep != '\0')
886 DPRINTF("fetch_url: parsed len as: " LLF "\n",
889 } else if (match_token(&cp, "Content-Range:")) {
890 if (! match_token(&cp, "bytes"))
896 rangestart = STRTOLL(cp, &ep, 10);
897 if (rangestart < 0 || *ep != '-')
900 rangeend = STRTOLL(cp, &ep, 10);
901 if (rangeend < 0 || rangeend < rangestart)
911 entitylen = STRTOLL(cp, &ep, 10);
921 fprintf(ttyout, "parsed range as: ");
922 if (rangestart == -1)
923 fprintf(ttyout, "*");
925 fprintf(ttyout, LLF "-" LLF,
928 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
931 if (! restart_point) {
933 "Received unexpected Content-Range header");
934 goto cleanup_fetch_url;
937 } else if (match_token(&cp, "Last-Modified:")) {
941 memset(&parsed, 0, sizeof(parsed));
942 t = parse_rfc2616time(&parsed, cp);
944 parsed.tm_isdst = -1;
946 mtime = timegm(&parsed);
948 if (ftp_debug && mtime != -1) {
950 "parsed time as: %s",
951 rfc2822time(localtime(&mtime)));
956 } else if (match_token(&cp, "Location:")) {
957 location = ftp_strdup(cp);
958 DPRINTF("fetch_url: parsed location as `%s'\n",
961 } else if (match_token(&cp, "Transfer-Encoding:")) {
962 if (match_token(&cp, "binary")) {
964 "Bogus transfer encoding `binary' (fetching anyway)");
967 if (! (token = match_token(&cp, "chunked"))) {
969 "Unsupported transfer encoding `%s'",
971 goto cleanup_fetch_url;
974 DPRINTF("fetch_url: using chunked encoding\n");
976 } else if (match_token(&cp, "Proxy-Authenticate:")
977 || match_token(&cp, "WWW-Authenticate:")) {
978 if (! (token = match_token(&cp, "Basic"))) {
980 "fetch_url: skipping unknown auth scheme `%s'\n",
985 auth = ftp_strdup(token);
986 DPRINTF("fetch_url: parsed auth as `%s'\n", cp);
990 /* finished parsing header */
996 if (! restart_point) {
997 warnx("Not expecting partial content header");
998 goto cleanup_fetch_url;
1007 if (EMPTYSTRING(location)) {
1009 "No redirection Location provided by server");
1010 goto cleanup_fetch_url;
1012 if (redirect_loop++ > 5) {
1013 warnx("Too many redirections requested");
1014 goto cleanup_fetch_url;
1018 fprintf(ttyout, "Redirected via %s\n",
1020 rval = fetch_url(url, location,
1021 proxyauth, wwwauth);
1024 fprintf(ttyout, "Redirected to %s\n",
1026 rval = go_fetch(location);
1028 goto cleanup_fetch_url;
1034 char *auser, *apass;
1045 if (verbose || *authp == NULL ||
1046 auser == NULL || apass == NULL)
1047 fprintf(ttyout, "%s\n", message);
1048 if (EMPTYSTRING(auth)) {
1050 "No authentication challenge provided by server");
1051 goto cleanup_fetch_url;
1053 if (*authp != NULL) {
1057 "Authorization failed. Retry (y/n)? ");
1058 if (get_line(stdin, reply, sizeof(reply), NULL)
1060 goto cleanup_fetch_url;
1062 if (tolower((unsigned char)reply[0]) != 'y')
1063 goto cleanup_fetch_url;
1067 if (auth_url(auth, authp, auser, apass) == 0) {
1068 rval = fetch_url(url, proxyenv,
1069 proxyauth, wwwauth);
1070 memset(*authp, 0, strlen(*authp));
1073 goto cleanup_fetch_url;
1078 warnx("Error retrieving file `%s'", message);
1080 warnx("Unknown error retrieving file");
1081 goto cleanup_fetch_url;
1083 } /* end of ftp:// or http:// specific setup */
1085 /* Open the output file. */
1086 if (strcmp(savefile, "-") == 0) {
1088 } else if (*savefile == '|') {
1089 oldintp = xsignal(SIGPIPE, SIG_IGN);
1090 fout = popen(savefile + 1, "w");
1092 warn("Can't execute `%s'", savefile + 1);
1093 goto cleanup_fetch_url;
1097 if ((rangeend != -1 && rangeend <= restart_point) ||
1098 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1101 fprintf(ttyout, "already done\n");
1103 goto cleanup_fetch_url;
1105 if (restart_point && rangestart != -1) {
1106 if (entitylen != -1)
1107 filesize = entitylen;
1108 if (rangestart != restart_point) {
1110 "Size of `%s' differs from save file `%s'",
1112 goto cleanup_fetch_url;
1114 fout = fopen(savefile, "a");
1116 fout = fopen(savefile, "w");
1118 warn("Can't open `%s'", savefile);
1119 goto cleanup_fetch_url;
1125 if (sigsetjmp(httpabort, 1))
1126 goto cleanup_fetch_url;
1127 (void)xsignal(SIGQUIT, psummary);
1128 oldintr = xsignal(SIGINT, aborthttp);
1130 assert(rcvbuf_size > 0);
1131 if ((size_t)rcvbuf_size > bufsize) {
1133 (void)free(xferbuf);
1134 bufsize = rcvbuf_size;
1135 xferbuf = ftp_malloc(bufsize);
1142 /* Finally, suck down the file. */
1149 /* read chunk-size */
1151 if (fgets(xferbuf, bufsize, fin) == NULL) {
1152 warnx("Unexpected EOF reading chunk-size");
1153 goto cleanup_fetch_url;
1156 chunksize = strtol(xferbuf, &ep, 16);
1157 if (ep == xferbuf) {
1158 warnx("Invalid chunk-size");
1159 goto cleanup_fetch_url;
1161 if (errno == ERANGE || chunksize < 0) {
1163 warn("Chunk-size `%.*s'",
1164 (int)(ep-xferbuf), xferbuf);
1165 goto cleanup_fetch_url;
1169 * XXX: Work around bug in Apache 1.3.9 and
1170 * 1.3.11, which incorrectly put trailing
1171 * space after the chunk-size.
1176 /* skip [ chunk-ext ] */
1178 while (*ep && *ep != '\r')
1182 if (strcmp(ep, "\r\n") != 0) {
1183 warnx("Unexpected data following chunk-size");
1184 goto cleanup_fetch_url;
1186 DPRINTF("fetch_url: got chunk-size of " LLF "\n",
1188 if (chunksize == 0) {
1193 /* transfer file or chunk */
1195 struct timeval then, now, td;
1199 (void)gettimeofday(&then, NULL);
1200 bufrem = rate_get ? rate_get : (off_t)bufsize;
1202 bufrem = MIN(chunksize, bufrem);
1203 while (bufrem > 0) {
1204 flen = fread(xferbuf, sizeof(char),
1205 MIN((off_t)bufsize, bufrem), fin);
1210 if (fwrite(xferbuf, sizeof(char), flen, fout)
1212 warn("Writing `%s'", savefile);
1213 goto cleanup_fetch_url;
1215 if (hash && !progress) {
1216 while (bytes >= hashbytes) {
1217 (void)putc('#', ttyout);
1220 (void)fflush(ttyout);
1230 (void)gettimeofday(&now, NULL);
1231 timersub(&now, &then, &td);
1234 usleep(1000000 - td.tv_usec);
1237 if (ischunked && chunksize <= 0)
1240 /* read CRLF after chunk*/
1243 if (fgets(xferbuf, bufsize, fin) == NULL) {
1244 warnx("Unexpected EOF reading chunk CRLF");
1245 goto cleanup_fetch_url;
1247 if (strcmp(xferbuf, "\r\n") != 0) {
1248 warnx("Unexpected data following chunk");
1249 goto cleanup_fetch_url;
1254 } while (ischunked);
1256 /* XXX: deal with optional trailer & CRLF here? */
1258 if (hash && !progress && bytes > 0) {
1260 (void)putc('#', ttyout);
1261 (void)putc('\n', ttyout);
1264 warn("Reading file");
1265 goto cleanup_fetch_url;
1269 if (closefunc == fclose && mtime != -1) {
1270 struct timeval tval[2];
1272 (void)gettimeofday(&tval[0], NULL);
1273 tval[1].tv_sec = mtime;
1274 tval[1].tv_usec = 0;
1278 if (utimes(savefile, tval) == -1) {
1280 "Can't change modification time to %s",
1281 rfc2822time(localtime(&mtime)));
1289 goto cleanup_fetch_url;
1292 warnx("Improper response from `%s:%s'", host, port);
1296 (void)xsignal(SIGINT, oldintr);
1298 (void)xsignal(SIGPIPE, oldintp);
1303 if (closefunc != NULL && fout != NULL)
1310 memset(pass, 0, strlen(pass));
1315 FREEPTR(decodedpath);
1318 memset(ppass, 0, strlen(ppass));
1327 * Abort a HTTP retrieval
1330 aborthttp(int notused)
1337 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1338 write(fileno(ttyout), msgbuf, len);
1339 siglongjmp(httpabort, 1);
1343 * Retrieve ftp URL or classic ftp argument using FTP.
1344 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1345 * is still open (e.g, ftp xfer with trailing /)
1348 fetch_ftp(const char *url)
1350 char *cp, *xargv[5], rempath[MAXPATHLEN];
1351 char *host, *path, *dir, *file, *uuser, *pass;
1353 char cmdbuf[MAXPATHLEN];
1355 int dirhasglob, filehasglob, rval, transtype, xargc;
1356 int oanonftp, oautologin;
1360 DPRINTF("fetch_ftp: `%s'\n", url);
1361 host = path = dir = file = uuser = pass = NULL;
1366 if (STRNEQUAL(url, FTP_URL)) {
1367 if ((parse_url(url, "URL", &urltype, &uuser, &pass,
1368 &host, &port, &portnum, &path) == -1) ||
1369 (uuser != NULL && *uuser == '\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) {
1443 (void)strlcpy(dirbuf, "/", sizeof(dirbuf));
1445 } else if (cp != NULL) {
1454 if (urltype == FTP_URL_T && file != NULL) {
1456 /* but still don't url_decode(dir) */
1458 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1459 "path `%s' dir `%s' file `%s'\n",
1460 STRorNULL(uuser), STRorNULL(pass),
1461 STRorNULL(host), STRorNULL(port),
1462 STRorNULL(path), STRorNULL(dir), STRorNULL(file));
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 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf));
1487 oautologin = autologin;
1488 /* don't autologin in setpeer(), use ftp_login() below */
1490 setpeer(xargc, xargv);
1491 autologin = oautologin;
1492 if ((connected == 0) ||
1493 (connected == 1 && !ftp_login(host, uuser, pass))) {
1494 warnx("Can't connect or login to host `%s:%s'",
1495 host, port ? port : "?");
1496 goto cleanup_fetch_ftp;
1499 switch (transtype) {
1504 setbinary(1, xargv);
1507 errx(1, "fetch_ftp: unknown transfer type %d", transtype);
1511 * Change directories, if necessary.
1513 * Note: don't use EMPTYSTRING(dir) below, because
1514 * dir=="" means something different from dir==NULL.
1516 if (dir != NULL && !dirhasglob) {
1520 * If we are dealing with a classic `[user@]host:[path]'
1521 * (urltype is CLASSIC_URL_T) then we have a raw directory
1522 * name (not encoded in any way) and we can change
1523 * directories in one step.
1525 * If we are dealing with an `ftp://host/path' URL
1526 * (urltype is FTP_URL_T), then RFC 3986 says we need to
1527 * send a separate CWD command for each unescaped "/"
1528 * in the path, and we have to interpret %hex escaping
1529 * *after* we find the slashes. It's possible to get
1530 * empty components here, (from multiple adjacent
1531 * slashes in the path) and RFC 3986 says that we should
1532 * still do `CWD ' (with a null argument) in such cases.
1534 * Many ftp servers don't support `CWD ', so if there's an
1535 * error performing that command, bail out with a descriptive
1540 * host: dir="", urltype=CLASSIC_URL_T
1541 * logged in (to default directory)
1542 * host:file dir=NULL, urltype=CLASSIC_URL_T
1544 * host:dir/ dir="dir", urltype=CLASSIC_URL_T
1545 * "CWD dir", logged in
1546 * ftp://host/ dir="", urltype=FTP_URL_T
1547 * logged in (to default directory)
1548 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
1549 * "CWD dir", logged in
1550 * ftp://host/file dir=NULL, urltype=FTP_URL_T
1552 * ftp://host//file dir="", urltype=FTP_URL_T
1553 * "CWD ", "RETR file"
1554 * host:/file dir="/", urltype=CLASSIC_URL_T
1555 * "CWD /", "RETR file"
1556 * ftp://host///file dir="/", urltype=FTP_URL_T
1557 * "CWD ", "CWD ", "RETR file"
1558 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
1559 * "CWD /", "RETR file"
1560 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
1561 * "CWD foo", "RETR file"
1562 * ftp://host/foo/bar/file dir="foo/bar"
1563 * "CWD foo", "CWD bar", "RETR file"
1564 * ftp://host//foo/bar/file dir="/foo/bar"
1565 * "CWD ", "CWD foo", "CWD bar", "RETR file"
1566 * ftp://host/foo//bar/file dir="foo//bar"
1567 * "CWD foo", "CWD ", "CWD bar", "RETR file"
1568 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
1569 * "CWD /", "CWD foo", "CWD bar", "RETR file"
1570 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
1571 * "CWD /foo", "CWD bar", "RETR file"
1572 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
1573 * "CWD /foo/bar", "RETR file"
1574 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
1575 * "RETR /foo/bar/file"
1577 * Note that we don't need `dir' after this point.
1580 if (urltype == FTP_URL_T) {
1581 nextpart = strchr(dir, '/');
1589 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n",
1590 STRorNULL(dir), STRorNULL(nextpart));
1591 if (urltype == FTP_URL_T || *dir != '\0') {
1592 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf));
1599 if (*dir == '\0' && code == 500)
1602 "ftp: The `CWD ' command (without a directory), which is required by\n"
1603 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n"
1604 " conflicts with the server's conformance to RFC 959.\n"
1605 " Try the same URL without the `//' in the URL pathname.\n"
1607 goto cleanup_fetch_ftp;
1611 } while (dir != NULL);
1614 if (EMPTYSTRING(file)) {
1616 goto cleanup_fetch_ftp;
1620 (void)strlcpy(rempath, dir, sizeof(rempath));
1621 (void)strlcat(rempath, "/", sizeof(rempath));
1622 (void)strlcat(rempath, file, sizeof(rempath));
1626 /* Fetch the file(s). */
1628 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf));
1632 if (dirhasglob || filehasglob) {
1635 ointeractive = interactive;
1637 if (restartautofetch)
1638 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf));
1640 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf));
1643 interactive = ointeractive;
1645 if (outfile == NULL) {
1646 cp = strrchr(file, '/'); /* find savefile */
1652 xargv[2] = (char *)outfile;
1655 if (restartautofetch)
1656 reget(xargc, xargv);
1661 if ((code / 100) == COMPLETE)
1670 memset(pass, 0, strlen(pass));
1676 * Retrieve the given file to outfile.
1677 * Supports arguments of the form:
1678 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1680 * "http://host/path" call fetch_url() to use HTTP
1681 * "file:///path" call fetch_url() to copy
1682 * "about:..." print a message
1684 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1685 * is still open (e.g, ftp xfer with trailing /)
1688 go_fetch(const char *url)
1696 if (STRNEQUAL(url, ABOUT_URL)) {
1697 url += sizeof(ABOUT_URL) -1;
1698 if (strcasecmp(url, "ftp") == 0 ||
1699 strcasecmp(url, "tnftp") == 0) {
1701 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1702 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1703 } else if (strcasecmp(url, "lukem") == 0) {
1705 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1706 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1707 } else if (strcasecmp(url, "netbsd") == 0) {
1709 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1710 "For more information, see http://www.NetBSD.org/\n", ttyout);
1711 } else if (strcasecmp(url, "version") == 0) {
1712 fprintf(ttyout, "Version: %s %s%s\n",
1713 FTP_PRODUCT, FTP_VERSION,
1721 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1723 fputs("\n", ttyout);
1729 * Check for file:// and http:// URLs.
1731 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1732 return (fetch_url(url, NULL, NULL, NULL));
1735 * Try FTP URL-style and host:file arguments next.
1736 * If ftpproxy is set with an FTP URL, use fetch_url()
1737 * Othewise, use fetch_ftp().
1739 proxyenv = getoptionvalue("ftp_proxy");
1740 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL))
1741 return (fetch_url(url, NULL, NULL, NULL));
1743 return (fetch_ftp(url));
1747 * Retrieve multiple files from the command line,
1748 * calling go_fetch() for each file.
1750 * If an ftp path has a trailing "/", the path will be cd-ed into and
1751 * the connection remains open, and the function will return -1
1752 * (to indicate the connection is alive).
1753 * If an error occurs the return value will be the offset+1 in
1754 * argv[] of the file that caused a problem (i.e, argv[x]
1756 * Otherwise, 0 is returned if all files retrieved successfully.
1759 auto_fetch(int argc, char *argv[])
1761 volatile int argpos, rval;
1765 if (sigsetjmp(toplevel, 1)) {
1767 disconnect(0, NULL);
1772 (void)xsignal(SIGINT, intr);
1773 (void)xsignal(SIGPIPE, lostpeer);
1776 * Loop through as long as there's files to fetch.
1778 for (; (rval == 0) && (argpos < argc); argpos++) {
1779 if (strchr(argv[argpos], ':') == NULL)
1783 anonftp = 2; /* Handle "automatic" transfers. */
1784 rval = go_fetch(argv[argpos]);
1785 if (outfile != NULL && strcmp(outfile, "-") != 0
1786 && outfile[0] != '|')
1792 if (connected && rval != -1)
1793 disconnect(0, NULL);
1799 * Upload multiple files from the command line.
1801 * If an error occurs the return value will be the offset+1 in
1802 * argv[] of the file that caused a problem (i.e, argv[x]
1804 * Otherwise, 0 is returned if all files uploaded successfully.
1807 auto_put(int argc, char **argv, const char *uploadserver)
1809 char *uargv[4], *path, *pathsep;
1810 int uargc, rval, argpos;
1812 char cmdbuf[MAX_C_NAME];
1814 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf));
1818 uargv[2] = uargv[3] = NULL;
1822 DPRINTF("auto_put: target `%s'\n", uploadserver);
1824 path = ftp_strdup(uploadserver);
1826 if (path[len - 1] != '/' && path[len - 1] != ':') {
1828 * make sure we always pass a directory to auto_fetch
1830 if (argc > 1) { /* more than one file to upload */
1831 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1833 path = (char *)ftp_malloc(len);
1834 (void)strlcpy(path, uploadserver, len);
1835 (void)strlcat(path, "/", len);
1836 } else { /* single file to upload */
1837 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf));
1839 pathsep = strrchr(path, '/');
1840 if (pathsep == NULL) {
1841 pathsep = strrchr(path, ':');
1842 if (pathsep == NULL) {
1843 warnx("Invalid URL `%s'", path);
1844 goto cleanup_auto_put;
1847 uargv[2] = ftp_strdup(pathsep);
1850 uargv[2] = ftp_strdup(pathsep + 1);
1855 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1856 path, STRorNULL(uargv[2]));
1858 /* connect and cwd */
1859 rval = auto_fetch(1, &path);
1861 goto cleanup_auto_put;
1865 /* target filename provided; upload 1 file */
1866 /* XXX : is this the best way? */
1870 if ((code / 100) != COMPLETE)
1872 } else { /* otherwise a target dir: upload all files to it */
1873 for(argpos = 0; argv[argpos] != NULL; argpos++) {
1874 uargv[1] = argv[argpos];
1876 if ((code / 100) != COMPLETE) {