1801 lines
45 KiB
C
1801 lines
45 KiB
C
/* $NetBSD: fetch.c,v 1.144 2003/07/31 05:23:59 lukem Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997-2003 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Luke Mewburn.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Scott Aaron Bamford.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__RCSID("$NetBSD: fetch.c,v 1.144 2003/07/31 05:23:59 lukem Exp $");
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* FTP User Program -- Command line file retrieval
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <arpa/ftp.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <netdb.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
|
|
#include "ftp_var.h"
|
|
#include "version.h"
|
|
|
|
typedef enum {
|
|
UNKNOWN_URL_T=-1,
|
|
HTTP_URL_T,
|
|
FTP_URL_T,
|
|
FILE_URL_T,
|
|
CLASSIC_URL_T
|
|
} url_t;
|
|
|
|
void aborthttp(int);
|
|
static int auth_url(const char *, char **, const char *, const char *);
|
|
static void base64_encode(const u_char *, size_t, u_char *);
|
|
static int go_fetch(const char *);
|
|
static int fetch_ftp(const char *);
|
|
static int fetch_url(const char *, const char *, char *, char *);
|
|
static int parse_url(const char *, const char *, url_t *, char **,
|
|
char **, char **, char **, in_port_t *, char **);
|
|
static void url_decode(char *);
|
|
|
|
static int redirect_loop;
|
|
|
|
|
|
#define ABOUT_URL "about:" /* propaganda */
|
|
#define FILE_URL "file://" /* file URL prefix */
|
|
#define FTP_URL "ftp://" /* ftp URL prefix */
|
|
#define HTTP_URL "http://" /* http URL prefix */
|
|
|
|
|
|
/*
|
|
* Generate authorization response based on given authentication challenge.
|
|
* Returns -1 if an error occurred, otherwise 0.
|
|
* Sets response to a malloc(3)ed string; caller should free.
|
|
*/
|
|
static int
|
|
auth_url(const char *challenge, char **response, const char *guser,
|
|
const char *gpass)
|
|
{
|
|
char *cp, *ep, *clear, *line, *realm, *scheme;
|
|
char user[BUFSIZ], *pass;
|
|
int rval;
|
|
size_t len, clen, rlen;
|
|
|
|
*response = NULL;
|
|
clear = realm = scheme = NULL;
|
|
rval = -1;
|
|
line = xstrdup(challenge);
|
|
cp = line;
|
|
|
|
if (debug)
|
|
fprintf(ttyout, "auth_url: challenge `%s'\n", challenge);
|
|
|
|
scheme = strsep(&cp, " ");
|
|
#define SCHEME_BASIC "Basic"
|
|
if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) {
|
|
warnx("Unsupported WWW Authentication challenge - `%s'",
|
|
challenge);
|
|
goto cleanup_auth_url;
|
|
}
|
|
cp += strspn(cp, " ");
|
|
|
|
#define REALM "realm=\""
|
|
if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0)
|
|
cp += sizeof(REALM) - 1;
|
|
else {
|
|
warnx("Unsupported WWW Authentication challenge - `%s'",
|
|
challenge);
|
|
goto cleanup_auth_url;
|
|
}
|
|
if ((ep = strchr(cp, '\"')) != NULL) {
|
|
size_t len = ep - cp;
|
|
|
|
realm = (char *)xmalloc(len + 1);
|
|
(void)strlcpy(realm, cp, len + 1);
|
|
} else {
|
|
warnx("Unsupported WWW Authentication challenge - `%s'",
|
|
challenge);
|
|
goto cleanup_auth_url;
|
|
}
|
|
|
|
if (guser != NULL)
|
|
(void)strlcpy(user, guser, sizeof(user));
|
|
else {
|
|
fprintf(ttyout, "Username for `%s': ", realm);
|
|
(void)fflush(ttyout);
|
|
if (fgets(user, sizeof(user) - 1, stdin) == NULL) {
|
|
clearerr(stdin);
|
|
goto cleanup_auth_url;
|
|
}
|
|
user[strlen(user) - 1] = '\0';
|
|
}
|
|
if (gpass != NULL)
|
|
pass = (char *)gpass;
|
|
else
|
|
pass = getpass("Password: ");
|
|
|
|
clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */
|
|
clear = (char *)xmalloc(clen);
|
|
(void)strlcpy(clear, user, clen);
|
|
(void)strlcat(clear, ":", clen);
|
|
(void)strlcat(clear, pass, clen);
|
|
if (gpass == NULL)
|
|
memset(pass, 0, strlen(pass));
|
|
|
|
/* scheme + " " + enc + "\0" */
|
|
rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
|
|
*response = (char *)xmalloc(rlen);
|
|
(void)strlcpy(*response, scheme, rlen);
|
|
len = strlcat(*response, " ", rlen);
|
|
base64_encode(clear, clen, (u_char *)*response + len);
|
|
memset(clear, 0, clen);
|
|
rval = 0;
|
|
|
|
cleanup_auth_url:
|
|
FREEPTR(clear);
|
|
FREEPTR(line);
|
|
FREEPTR(realm);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Encode len bytes starting at clear using base64 encoding into encoded,
|
|
* which should be at least ((len + 2) * 4 / 3 + 1) in size.
|
|
*/
|
|
static void
|
|
base64_encode(const u_char *clear, size_t len, u_char *encoded)
|
|
{
|
|
static const u_char enc[] =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
u_char *cp;
|
|
int i;
|
|
|
|
cp = encoded;
|
|
for (i = 0; i < len; i += 3) {
|
|
*(cp++) = enc[((clear[i + 0] >> 2))];
|
|
*(cp++) = enc[((clear[i + 0] << 4) & 0x30)
|
|
| ((clear[i + 1] >> 4) & 0x0f)];
|
|
*(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
|
|
| ((clear[i + 2] >> 6) & 0x03)];
|
|
*(cp++) = enc[((clear[i + 2] ) & 0x3f)];
|
|
}
|
|
*cp = '\0';
|
|
while (i-- > len)
|
|
*(--cp) = '=';
|
|
}
|
|
|
|
/*
|
|
* Decode %xx escapes in given string, `in-place'.
|
|
*/
|
|
static void
|
|
url_decode(char *url)
|
|
{
|
|
unsigned char *p, *q;
|
|
|
|
if (EMPTYSTRING(url))
|
|
return;
|
|
p = q = (unsigned char *)url;
|
|
|
|
#define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
|
|
while (*p) {
|
|
if (p[0] == '%'
|
|
&& p[1] && isxdigit((unsigned char)p[1])
|
|
&& p[2] && isxdigit((unsigned char)p[2])) {
|
|
*q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
|
|
p+=3;
|
|
} else
|
|
*q++ = *p++;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
|
|
|
|
/*
|
|
* Parse URL of form:
|
|
* <type>://[<user>[:<password>@]]<host>[:<port>][/<path>]
|
|
* Returns -1 if a parse error occurred, otherwise 0.
|
|
* It's the caller's responsibility to url_decode() the returned
|
|
* user, pass and path.
|
|
*
|
|
* Sets type to url_t, each of the given char ** pointers to a
|
|
* malloc(3)ed strings of the relevant section, and port to
|
|
* the number given, or ftpport if ftp://, or httpport if http://.
|
|
*
|
|
* If <host> is surrounded by `[' and ']', it's parsed as an
|
|
* IPv6 address (as per RFC 2732).
|
|
*
|
|
* XXX: this is not totally RFC 1738 compliant; <path> will have the
|
|
* leading `/' unless it's an ftp:// URL, as this makes things easier
|
|
* for file:// and http:// URLs. ftp:// URLs have the `/' between the
|
|
* host and the URL-path removed, but any additional leading slashes
|
|
* in the URL-path are retained (because they imply that we should
|
|
* later do "CWD" with a null argument).
|
|
*
|
|
* Examples:
|
|
* input URL output path
|
|
* --------- -----------
|
|
* "ftp://host" NULL
|
|
* "http://host/" NULL
|
|
* "file://host/dir/file" "dir/file"
|
|
* "ftp://host/" ""
|
|
* "ftp://host//" NULL
|
|
* "ftp://host//dir/file" "/dir/file"
|
|
*/
|
|
static int
|
|
parse_url(const char *url, const char *desc, url_t *type,
|
|
char **user, char **pass, char **host, char **port,
|
|
in_port_t *portnum, char **path)
|
|
{
|
|
const char *origurl;
|
|
char *cp, *ep, *thost, *tport;
|
|
size_t len;
|
|
|
|
if (url == NULL || desc == NULL || type == NULL || user == NULL
|
|
|| pass == NULL || host == NULL || port == NULL || portnum == NULL
|
|
|| path == NULL)
|
|
errx(1, "parse_url: invoked with NULL argument!");
|
|
|
|
origurl = url;
|
|
*type = UNKNOWN_URL_T;
|
|
*user = *pass = *host = *port = *path = NULL;
|
|
*portnum = 0;
|
|
tport = NULL;
|
|
|
|
if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) {
|
|
url += sizeof(HTTP_URL) - 1;
|
|
*type = HTTP_URL_T;
|
|
*portnum = HTTP_PORT;
|
|
tport = httpport;
|
|
} else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
|
|
url += sizeof(FTP_URL) - 1;
|
|
*type = FTP_URL_T;
|
|
*portnum = FTP_PORT;
|
|
tport = ftpport;
|
|
} else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) {
|
|
url += sizeof(FILE_URL) - 1;
|
|
*type = FILE_URL_T;
|
|
} else {
|
|
warnx("Invalid %s `%s'", desc, url);
|
|
cleanup_parse_url:
|
|
FREEPTR(*user);
|
|
FREEPTR(*pass);
|
|
FREEPTR(*host);
|
|
FREEPTR(*port);
|
|
FREEPTR(*path);
|
|
return (-1);
|
|
}
|
|
|
|
if (*url == '\0')
|
|
return (0);
|
|
|
|
/* find [user[:pass]@]host[:port] */
|
|
ep = strchr(url, '/');
|
|
if (ep == NULL)
|
|
thost = xstrdup(url);
|
|
else {
|
|
len = ep - url;
|
|
thost = (char *)xmalloc(len + 1);
|
|
(void)strlcpy(thost, url, len + 1);
|
|
if (*type == FTP_URL_T) /* skip first / for ftp URLs */
|
|
ep++;
|
|
*path = xstrdup(ep);
|
|
}
|
|
|
|
cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
|
|
if (cp != NULL) {
|
|
if (*type == FTP_URL_T)
|
|
anonftp = 0; /* disable anonftp */
|
|
*user = thost;
|
|
*cp = '\0';
|
|
thost = xstrdup(cp + 1);
|
|
cp = strchr(*user, ':');
|
|
if (cp != NULL) {
|
|
*cp = '\0';
|
|
*pass = xstrdup(cp + 1);
|
|
}
|
|
}
|
|
|
|
#ifdef INET6
|
|
/*
|
|
* Check if thost is an encoded IPv6 address, as per
|
|
* RFC 2732:
|
|
* `[' ipv6-address ']'
|
|
*/
|
|
if (*thost == '[') {
|
|
cp = thost + 1;
|
|
if ((ep = strchr(cp, ']')) == NULL ||
|
|
(ep[1] != '\0' && ep[1] != ':')) {
|
|
warnx("Invalid address `%s' in %s `%s'",
|
|
thost, desc, origurl);
|
|
goto cleanup_parse_url;
|
|
}
|
|
len = ep - cp; /* change `[xyz]' -> `xyz' */
|
|
memmove(thost, thost + 1, len);
|
|
thost[len] = '\0';
|
|
if (! isipv6addr(thost)) {
|
|
warnx("Invalid IPv6 address `%s' in %s `%s'",
|
|
thost, desc, origurl);
|
|
goto cleanup_parse_url;
|
|
}
|
|
cp = ep + 1;
|
|
if (*cp == ':')
|
|
cp++;
|
|
else
|
|
cp = NULL;
|
|
} else
|
|
#endif /* INET6 */
|
|
if ((cp = strchr(thost, ':')) != NULL)
|
|
*cp++ = '\0';
|
|
*host = thost;
|
|
|
|
/* look for [:port] */
|
|
if (cp != NULL) {
|
|
long nport;
|
|
|
|
nport = parseport(cp, -1);
|
|
if (nport == -1) {
|
|
warnx("Unknown port `%s' in %s `%s'",
|
|
cp, desc, origurl);
|
|
goto cleanup_parse_url;
|
|
}
|
|
*portnum = nport;
|
|
tport = cp;
|
|
}
|
|
|
|
if (tport != NULL)
|
|
*port = xstrdup(tport);
|
|
if (*path == NULL)
|
|
*path = xstrdup("/");
|
|
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"parse_url: user `%s' pass `%s' host %s port %s(%d) "
|
|
"path `%s'\n",
|
|
*user ? *user : "<null>", *pass ? *pass : "<null>",
|
|
*host ? *host : "<null>", *port ? *port : "<null>",
|
|
*portnum ? *portnum : -1, *path ? *path : "<null>");
|
|
|
|
return (0);
|
|
}
|
|
|
|
sigjmp_buf httpabort;
|
|
|
|
/*
|
|
* Retrieve URL, via a proxy if necessary, using HTTP.
|
|
* If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
|
|
* http_proxy as appropriate.
|
|
* Supports HTTP redirects.
|
|
* Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
|
|
* is still open (e.g, ftp xfer with trailing /)
|
|
*/
|
|
static int
|
|
fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
|
|
{
|
|
struct addrinfo hints, *res, *res0 = NULL;
|
|
int error;
|
|
char hbuf[NI_MAXHOST];
|
|
volatile sigfunc oldintr, oldintp;
|
|
volatile int s;
|
|
struct stat sb;
|
|
int ischunked, isproxy, rval, hcode;
|
|
size_t len;
|
|
static size_t bufsize;
|
|
static char *xferbuf;
|
|
char *cp, *ep, *buf, *savefile;
|
|
char *auth, *location, *message;
|
|
char *user, *pass, *host, *port, *path, *decodedpath;
|
|
char *puser, *ppass, *useragent;
|
|
off_t hashbytes, rangestart, rangeend, entitylen;
|
|
int (*closefunc)(FILE *);
|
|
FILE *fin, *fout;
|
|
time_t mtime;
|
|
url_t urltype;
|
|
in_port_t portnum;
|
|
|
|
oldintr = oldintp = NULL;
|
|
closefunc = NULL;
|
|
fin = fout = NULL;
|
|
s = -1;
|
|
buf = savefile = NULL;
|
|
auth = location = message = NULL;
|
|
ischunked = isproxy = hcode = 0;
|
|
rval = 1;
|
|
user = pass = host = path = decodedpath = puser = ppass = NULL;
|
|
|
|
#ifdef __GNUC__ /* shut up gcc warnings */
|
|
(void)&closefunc;
|
|
(void)&fin;
|
|
(void)&fout;
|
|
(void)&buf;
|
|
(void)&savefile;
|
|
(void)&rval;
|
|
(void)&isproxy;
|
|
(void)&hcode;
|
|
(void)&ischunked;
|
|
(void)&message;
|
|
(void)&location;
|
|
(void)&auth;
|
|
(void)&decodedpath;
|
|
#endif
|
|
|
|
if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port,
|
|
&portnum, &path) == -1)
|
|
goto cleanup_fetch_url;
|
|
|
|
if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
|
|
&& strcasecmp(host, "localhost") != 0) {
|
|
warnx("No support for non local file URL `%s'", url);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
if (EMPTYSTRING(path)) {
|
|
if (urltype == FTP_URL_T) {
|
|
rval = fetch_ftp(url);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (urltype != HTTP_URL_T || outfile == NULL) {
|
|
warnx("Invalid URL (no file after host) `%s'", url);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
}
|
|
|
|
decodedpath = xstrdup(path);
|
|
url_decode(decodedpath);
|
|
|
|
if (outfile)
|
|
savefile = xstrdup(outfile);
|
|
else {
|
|
cp = strrchr(decodedpath, '/'); /* find savefile */
|
|
if (cp != NULL)
|
|
savefile = xstrdup(cp + 1);
|
|
else
|
|
savefile = xstrdup(decodedpath);
|
|
}
|
|
if (EMPTYSTRING(savefile)) {
|
|
if (urltype == FTP_URL_T) {
|
|
rval = fetch_ftp(url);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
warnx("no file after directory (you must specify an "
|
|
"output file) `%s'", url);
|
|
goto cleanup_fetch_url;
|
|
} else {
|
|
if (debug)
|
|
fprintf(ttyout, "got savefile as `%s'\n", savefile);
|
|
}
|
|
|
|
restart_point = 0;
|
|
filesize = -1;
|
|
rangestart = rangeend = entitylen = -1;
|
|
mtime = -1;
|
|
if (restartautofetch) {
|
|
if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
|
|
stat(savefile, &sb) == 0)
|
|
restart_point = sb.st_size;
|
|
}
|
|
if (urltype == FILE_URL_T) { /* file:// URLs */
|
|
direction = "copied";
|
|
fin = fopen(decodedpath, "r");
|
|
if (fin == NULL) {
|
|
warn("Cannot open file `%s'", decodedpath);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (fstat(fileno(fin), &sb) == 0) {
|
|
mtime = sb.st_mtime;
|
|
filesize = sb.st_size;
|
|
}
|
|
if (restart_point) {
|
|
if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
|
|
warn("Can't lseek to restart `%s'",
|
|
decodedpath);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
}
|
|
if (verbose) {
|
|
fprintf(ttyout, "Copying %s", decodedpath);
|
|
if (restart_point)
|
|
fprintf(ttyout, " (restarting at " LLF ")",
|
|
(LLT)restart_point);
|
|
fputs("\n", ttyout);
|
|
}
|
|
} else { /* ftp:// or http:// URLs */
|
|
char *leading;
|
|
int hasleading;
|
|
|
|
if (proxyenv == NULL) {
|
|
if (urltype == HTTP_URL_T)
|
|
proxyenv = getoptionvalue("http_proxy");
|
|
else if (urltype == FTP_URL_T)
|
|
proxyenv = getoptionvalue("ftp_proxy");
|
|
}
|
|
direction = "retrieved";
|
|
if (! EMPTYSTRING(proxyenv)) { /* use proxy */
|
|
url_t purltype;
|
|
char *phost, *ppath;
|
|
char *pport, *no_proxy;
|
|
|
|
isproxy = 1;
|
|
|
|
/* check URL against list of no_proxied sites */
|
|
no_proxy = getoptionvalue("no_proxy");
|
|
if (! EMPTYSTRING(no_proxy)) {
|
|
char *np, *np_copy;
|
|
long np_port;
|
|
size_t hlen, plen;
|
|
|
|
np_copy = xstrdup(no_proxy);
|
|
hlen = strlen(host);
|
|
while ((cp = strsep(&np_copy, " ,")) != NULL) {
|
|
if (*cp == '\0')
|
|
continue;
|
|
if ((np = strrchr(cp, ':')) != NULL) {
|
|
*np = '\0';
|
|
np_port =
|
|
strtol(np + 1, &ep, 10);
|
|
if (*ep != '\0')
|
|
continue;
|
|
if (np_port != portnum)
|
|
continue;
|
|
}
|
|
plen = strlen(cp);
|
|
if (hlen < plen)
|
|
continue;
|
|
if (strncasecmp(host + hlen - plen,
|
|
cp, plen) == 0) {
|
|
isproxy = 0;
|
|
break;
|
|
}
|
|
}
|
|
FREEPTR(np_copy);
|
|
if (isproxy == 0 && urltype == FTP_URL_T) {
|
|
rval = fetch_ftp(url);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
}
|
|
|
|
if (isproxy) {
|
|
if (parse_url(proxyenv, "proxy URL", &purltype,
|
|
&puser, &ppass, &phost, &pport, &portnum,
|
|
&ppath) == -1)
|
|
goto cleanup_fetch_url;
|
|
|
|
if ((purltype != HTTP_URL_T
|
|
&& purltype != FTP_URL_T) ||
|
|
EMPTYSTRING(phost) ||
|
|
(! EMPTYSTRING(ppath)
|
|
&& strcmp(ppath, "/") != 0)) {
|
|
warnx("Malformed proxy URL `%s'",
|
|
proxyenv);
|
|
FREEPTR(phost);
|
|
FREEPTR(pport);
|
|
FREEPTR(ppath);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (isipv6addr(host) &&
|
|
strchr(host, '%') != NULL) {
|
|
warnx(
|
|
"Scoped address notation `%s' disallowed via web proxy",
|
|
host);
|
|
FREEPTR(phost);
|
|
FREEPTR(pport);
|
|
FREEPTR(ppath);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
FREEPTR(host);
|
|
host = phost;
|
|
FREEPTR(port);
|
|
port = pport;
|
|
FREEPTR(path);
|
|
path = xstrdup(url);
|
|
FREEPTR(ppath);
|
|
}
|
|
} /* ! EMPTYSTRING(proxyenv) */
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_flags = 0;
|
|
hints.ai_family = family;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
error = getaddrinfo(host, NULL, &hints, &res0);
|
|
if (error) {
|
|
warnx("%s", gai_strerror(error));
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (res0->ai_canonname)
|
|
host = res0->ai_canonname;
|
|
|
|
s = -1;
|
|
for (res = res0; res; res = res->ai_next) {
|
|
/*
|
|
* see comment in hookup()
|
|
*/
|
|
ai_unmapped(res);
|
|
if (getnameinfo(res->ai_addr, res->ai_addrlen,
|
|
hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
|
|
strlcpy(hbuf, "invalid", sizeof(hbuf));
|
|
|
|
if (verbose && res != res0)
|
|
fprintf(ttyout, "Trying %s...\n", hbuf);
|
|
|
|
((struct sockaddr_in *)res->ai_addr)->sin_port =
|
|
htons(portnum);
|
|
s = socket(res->ai_family, SOCK_STREAM,
|
|
res->ai_protocol);
|
|
if (s < 0) {
|
|
warn("Can't create socket");
|
|
continue;
|
|
}
|
|
|
|
if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) {
|
|
warn("Connect to address `%s'", hbuf);
|
|
close(s);
|
|
s = -1;
|
|
continue;
|
|
}
|
|
|
|
/* success */
|
|
break;
|
|
}
|
|
freeaddrinfo(res0);
|
|
|
|
if (s < 0) {
|
|
warn("Can't connect to %s", host);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
fin = fdopen(s, "r+");
|
|
/*
|
|
* Construct and send the request.
|
|
*/
|
|
if (verbose)
|
|
fprintf(ttyout, "Requesting %s\n", url);
|
|
leading = " (";
|
|
hasleading = 0;
|
|
if (isproxy) {
|
|
if (verbose) {
|
|
fprintf(ttyout, "%svia %s:%s", leading,
|
|
host, port);
|
|
leading = ", ";
|
|
hasleading++;
|
|
}
|
|
fprintf(fin, "GET %s HTTP/1.0\r\n", path);
|
|
if (flushcache)
|
|
fprintf(fin, "Pragma: no-cache\r\n");
|
|
} else {
|
|
fprintf(fin, "GET %s HTTP/1.1\r\n", path);
|
|
if (strchr(host, ':')) {
|
|
char *h, *p;
|
|
|
|
/*
|
|
* strip off IPv6 scope identifier, since it is
|
|
* local to the node
|
|
*/
|
|
h = xstrdup(host);
|
|
if (isipv6addr(h) &&
|
|
(p = strchr(h, '%')) != NULL) {
|
|
*p = '\0';
|
|
}
|
|
fprintf(fin, "Host: [%s]", h);
|
|
free(h);
|
|
} else
|
|
fprintf(fin, "Host: %s", host);
|
|
if (portnum != HTTP_PORT)
|
|
fprintf(fin, ":%u", portnum);
|
|
fprintf(fin, "\r\n");
|
|
fprintf(fin, "Accept: */*\r\n");
|
|
fprintf(fin, "Connection: close\r\n");
|
|
if (restart_point) {
|
|
fputs(leading, ttyout);
|
|
fprintf(fin, "Range: bytes=" LLF "-\r\n",
|
|
(LLT)restart_point);
|
|
fprintf(ttyout, "restarting at " LLF,
|
|
(LLT)restart_point);
|
|
leading = ", ";
|
|
hasleading++;
|
|
}
|
|
if (flushcache)
|
|
fprintf(fin, "Cache-Control: no-cache\r\n");
|
|
}
|
|
if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
|
|
fprintf(fin, "User-Agent: %s\r\n", useragent);
|
|
} else {
|
|
fprintf(fin, "User-Agent: %s/%s\r\n",
|
|
FTP_PRODUCT, FTP_VERSION);
|
|
}
|
|
if (wwwauth) {
|
|
if (verbose) {
|
|
fprintf(ttyout, "%swith authorization",
|
|
leading);
|
|
leading = ", ";
|
|
hasleading++;
|
|
}
|
|
fprintf(fin, "Authorization: %s\r\n", wwwauth);
|
|
}
|
|
if (proxyauth) {
|
|
if (verbose) {
|
|
fprintf(ttyout,
|
|
"%swith proxy authorization", leading);
|
|
leading = ", ";
|
|
hasleading++;
|
|
}
|
|
fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
|
|
}
|
|
if (verbose && hasleading)
|
|
fputs(")\n", ttyout);
|
|
fprintf(fin, "\r\n");
|
|
if (fflush(fin) == EOF) {
|
|
warn("Writing HTTP request");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
/* Read the response */
|
|
if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) {
|
|
warn("Receiving HTTP reply");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n'))
|
|
buf[--len] = '\0';
|
|
if (debug)
|
|
fprintf(ttyout, "received `%s'\n", buf);
|
|
|
|
/* Determine HTTP response code */
|
|
cp = strchr(buf, ' ');
|
|
if (cp == NULL)
|
|
goto improper;
|
|
else
|
|
cp++;
|
|
hcode = strtol(cp, &ep, 10);
|
|
if (*ep != '\0' && !isspace((unsigned char)*ep))
|
|
goto improper;
|
|
message = xstrdup(cp);
|
|
|
|
/* Read the rest of the header. */
|
|
FREEPTR(buf);
|
|
while (1) {
|
|
if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0))
|
|
== NULL) {
|
|
warn("Receiving HTTP reply");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
while (len > 0 &&
|
|
(buf[len-1] == '\r' || buf[len-1] == '\n'))
|
|
buf[--len] = '\0';
|
|
if (len == 0)
|
|
break;
|
|
if (debug)
|
|
fprintf(ttyout, "received `%s'\n", buf);
|
|
|
|
/* Look for some headers */
|
|
cp = buf;
|
|
|
|
#define CONTENTLEN "Content-Length: "
|
|
if (strncasecmp(cp, CONTENTLEN,
|
|
sizeof(CONTENTLEN) - 1) == 0) {
|
|
cp += sizeof(CONTENTLEN) - 1;
|
|
filesize = STRTOLL(cp, &ep, 10);
|
|
if (filesize < 0 || *ep != '\0')
|
|
goto improper;
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"parsed len as: " LLF "\n",
|
|
(LLT)filesize);
|
|
|
|
#define CONTENTRANGE "Content-Range: bytes "
|
|
} else if (strncasecmp(cp, CONTENTRANGE,
|
|
sizeof(CONTENTRANGE) - 1) == 0) {
|
|
cp += sizeof(CONTENTRANGE) - 1;
|
|
if (*cp == '*') {
|
|
ep = cp + 1;
|
|
}
|
|
else {
|
|
rangestart = STRTOLL(cp, &ep, 10);
|
|
if (rangestart < 0 || *ep != '-')
|
|
goto improper;
|
|
cp = ep + 1;
|
|
rangeend = STRTOLL(cp, &ep, 10);
|
|
if (rangeend < 0 || rangeend < rangestart)
|
|
goto improper;
|
|
}
|
|
if (*ep != '/')
|
|
goto improper;
|
|
cp = ep + 1;
|
|
if (*cp == '*') {
|
|
ep = cp + 1;
|
|
}
|
|
else {
|
|
entitylen = STRTOLL(cp, &ep, 10);
|
|
if (entitylen < 0)
|
|
goto improper;
|
|
}
|
|
if (*ep != '\0')
|
|
goto improper;
|
|
|
|
if (debug) {
|
|
fprintf(ttyout, "parsed range as: ");
|
|
if (rangestart == -1)
|
|
fprintf(ttyout, "*");
|
|
else
|
|
fprintf(ttyout, LLF "-" LLF,
|
|
(LLT)rangestart,
|
|
(LLT)rangeend);
|
|
fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
|
|
}
|
|
if (! restart_point) {
|
|
warnx(
|
|
"Received unexpected Content-Range header");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
#define LASTMOD "Last-Modified: "
|
|
} else if (strncasecmp(cp, LASTMOD,
|
|
sizeof(LASTMOD) - 1) == 0) {
|
|
struct tm parsed;
|
|
char *t;
|
|
|
|
cp += sizeof(LASTMOD) - 1;
|
|
/* RFC 1123 */
|
|
if ((t = strptime(cp,
|
|
"%a, %d %b %Y %H:%M:%S GMT",
|
|
&parsed))
|
|
/* RFC 850 */
|
|
|| (t = strptime(cp,
|
|
"%a, %d-%b-%y %H:%M:%S GMT",
|
|
&parsed))
|
|
/* asctime */
|
|
|| (t = strptime(cp,
|
|
"%a, %b %d %H:%M:%S %Y",
|
|
&parsed))) {
|
|
parsed.tm_isdst = -1;
|
|
if (*t == '\0')
|
|
mtime = timegm(&parsed);
|
|
if (debug && mtime != -1) {
|
|
fprintf(ttyout,
|
|
"parsed date as: %s",
|
|
ctime(&mtime));
|
|
}
|
|
}
|
|
|
|
#define LOCATION "Location: "
|
|
} else if (strncasecmp(cp, LOCATION,
|
|
sizeof(LOCATION) - 1) == 0) {
|
|
cp += sizeof(LOCATION) - 1;
|
|
location = xstrdup(cp);
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"parsed location as: %s\n", cp);
|
|
|
|
#define TRANSENC "Transfer-Encoding: "
|
|
} else if (strncasecmp(cp, TRANSENC,
|
|
sizeof(TRANSENC) - 1) == 0) {
|
|
cp += sizeof(TRANSENC) - 1;
|
|
if (strcasecmp(cp, "binary") == 0) {
|
|
warnx(
|
|
"Bogus transfer encoding - `%s' (fetching anyway)",
|
|
cp);
|
|
continue;
|
|
}
|
|
if (strcasecmp(cp, "chunked") != 0) {
|
|
warnx(
|
|
"Unsupported transfer encoding - `%s'",
|
|
cp);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
ischunked++;
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"using chunked encoding\n");
|
|
|
|
#define PROXYAUTH "Proxy-Authenticate: "
|
|
} else if (strncasecmp(cp, PROXYAUTH,
|
|
sizeof(PROXYAUTH) - 1) == 0) {
|
|
cp += sizeof(PROXYAUTH) - 1;
|
|
FREEPTR(auth);
|
|
auth = xstrdup(cp);
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"parsed proxy-auth as: %s\n", cp);
|
|
|
|
#define WWWAUTH "WWW-Authenticate: "
|
|
} else if (strncasecmp(cp, WWWAUTH,
|
|
sizeof(WWWAUTH) - 1) == 0) {
|
|
cp += sizeof(WWWAUTH) - 1;
|
|
FREEPTR(auth);
|
|
auth = xstrdup(cp);
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"parsed www-auth as: %s\n", cp);
|
|
|
|
}
|
|
|
|
}
|
|
/* finished parsing header */
|
|
FREEPTR(buf);
|
|
|
|
switch (hcode) {
|
|
case 200:
|
|
break;
|
|
case 206:
|
|
if (! restart_point) {
|
|
warnx("Not expecting partial content header");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
break;
|
|
case 300:
|
|
case 301:
|
|
case 302:
|
|
case 303:
|
|
case 305:
|
|
if (EMPTYSTRING(location)) {
|
|
warnx(
|
|
"No redirection Location provided by server");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (redirect_loop++ > 5) {
|
|
warnx("Too many redirections requested");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (hcode == 305) {
|
|
if (verbose)
|
|
fprintf(ttyout, "Redirected via %s\n",
|
|
location);
|
|
rval = fetch_url(url, location,
|
|
proxyauth, wwwauth);
|
|
} else {
|
|
if (verbose)
|
|
fprintf(ttyout, "Redirected to %s\n",
|
|
location);
|
|
rval = go_fetch(location);
|
|
}
|
|
goto cleanup_fetch_url;
|
|
case 401:
|
|
case 407:
|
|
{
|
|
char **authp;
|
|
char *auser, *apass;
|
|
|
|
fprintf(ttyout, "%s\n", message);
|
|
if (EMPTYSTRING(auth)) {
|
|
warnx(
|
|
"No authentication challenge provided by server");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (hcode == 401) {
|
|
authp = &wwwauth;
|
|
auser = user;
|
|
apass = pass;
|
|
} else {
|
|
authp = &proxyauth;
|
|
auser = puser;
|
|
apass = ppass;
|
|
}
|
|
if (*authp != NULL) {
|
|
char reply[10];
|
|
|
|
fprintf(ttyout,
|
|
"Authorization failed. Retry (y/n)? ");
|
|
if (fgets(reply, sizeof(reply), stdin)
|
|
== NULL) {
|
|
clearerr(stdin);
|
|
goto cleanup_fetch_url;
|
|
} else {
|
|
if (tolower(reply[0]) != 'y')
|
|
goto cleanup_fetch_url;
|
|
}
|
|
auser = NULL;
|
|
apass = NULL;
|
|
}
|
|
if (auth_url(auth, authp, auser, apass) == 0) {
|
|
rval = fetch_url(url, proxyenv,
|
|
proxyauth, wwwauth);
|
|
memset(*authp, 0, strlen(*authp));
|
|
FREEPTR(*authp);
|
|
}
|
|
goto cleanup_fetch_url;
|
|
}
|
|
default:
|
|
if (message)
|
|
warnx("Error retrieving file - `%s'", message);
|
|
else
|
|
warnx("Unknown error retrieving file");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
} /* end of ftp:// or http:// specific setup */
|
|
|
|
/* Open the output file. */
|
|
if (strcmp(savefile, "-") == 0) {
|
|
fout = stdout;
|
|
} else if (*savefile == '|') {
|
|
oldintp = xsignal(SIGPIPE, SIG_IGN);
|
|
fout = popen(savefile + 1, "w");
|
|
if (fout == NULL) {
|
|
warn("Can't run `%s'", savefile + 1);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
closefunc = pclose;
|
|
} else {
|
|
if ((rangeend != -1 && rangeend <= restart_point) ||
|
|
(rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
|
|
/* already done */
|
|
if (verbose)
|
|
fprintf(ttyout, "already done\n");
|
|
rval = 0;
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (restart_point && rangestart != -1) {
|
|
if (entitylen != -1)
|
|
filesize = entitylen;
|
|
if (rangestart != restart_point) {
|
|
warnx(
|
|
"Size of `%s' differs from save file `%s'",
|
|
url, savefile);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
fout = fopen(savefile, "a");
|
|
} else
|
|
fout = fopen(savefile, "w");
|
|
if (fout == NULL) {
|
|
warn("Can't open `%s'", savefile);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
closefunc = fclose;
|
|
}
|
|
|
|
/* Trap signals */
|
|
if (sigsetjmp(httpabort, 1))
|
|
goto cleanup_fetch_url;
|
|
(void)xsignal(SIGQUIT, psummary);
|
|
oldintr = xsignal(SIGINT, aborthttp);
|
|
|
|
if (rcvbuf_size > bufsize) {
|
|
if (xferbuf)
|
|
(void)free(xferbuf);
|
|
bufsize = rcvbuf_size;
|
|
xferbuf = xmalloc(bufsize);
|
|
}
|
|
|
|
bytes = 0;
|
|
hashbytes = mark;
|
|
progressmeter(-1);
|
|
|
|
/* Finally, suck down the file. */
|
|
do {
|
|
long chunksize;
|
|
|
|
chunksize = 0;
|
|
/* read chunksize */
|
|
if (ischunked) {
|
|
if (fgets(xferbuf, bufsize, fin) == NULL) {
|
|
warnx("Unexpected EOF reading chunksize");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
chunksize = strtol(xferbuf, &ep, 16);
|
|
|
|
/*
|
|
* XXX: Work around bug in Apache 1.3.9 and
|
|
* 1.3.11, which incorrectly put trailing
|
|
* space after the chunksize.
|
|
*/
|
|
while (*ep == ' ')
|
|
ep++;
|
|
|
|
if (strcmp(ep, "\r\n") != 0) {
|
|
warnx("Unexpected data following chunksize");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (debug)
|
|
fprintf(ttyout, "got chunksize of " LLF "\n",
|
|
(LLT)chunksize);
|
|
if (chunksize == 0)
|
|
break;
|
|
}
|
|
/* transfer file or chunk */
|
|
while (1) {
|
|
struct timeval then, now, td;
|
|
off_t bufrem;
|
|
|
|
if (rate_get)
|
|
(void)gettimeofday(&then, NULL);
|
|
bufrem = rate_get ? rate_get : bufsize;
|
|
if (ischunked)
|
|
bufrem = MIN(chunksize, bufrem);
|
|
while (bufrem > 0) {
|
|
len = fread(xferbuf, sizeof(char),
|
|
MIN(bufsize, bufrem), fin);
|
|
if (len <= 0)
|
|
goto chunkdone;
|
|
bytes += len;
|
|
bufrem -= len;
|
|
if (fwrite(xferbuf, sizeof(char), len, fout)
|
|
!= len) {
|
|
warn("Writing `%s'", savefile);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (hash && !progress) {
|
|
while (bytes >= hashbytes) {
|
|
(void)putc('#', ttyout);
|
|
hashbytes += mark;
|
|
}
|
|
(void)fflush(ttyout);
|
|
}
|
|
if (ischunked) {
|
|
chunksize -= len;
|
|
if (chunksize <= 0)
|
|
break;
|
|
}
|
|
}
|
|
if (rate_get) {
|
|
while (1) {
|
|
(void)gettimeofday(&now, NULL);
|
|
timersub(&now, &then, &td);
|
|
if (td.tv_sec > 0)
|
|
break;
|
|
usleep(1000000 - td.tv_usec);
|
|
}
|
|
}
|
|
if (ischunked && chunksize <= 0)
|
|
break;
|
|
}
|
|
/* read CRLF after chunk*/
|
|
chunkdone:
|
|
if (ischunked) {
|
|
if (fgets(xferbuf, bufsize, fin) == NULL)
|
|
break;
|
|
if (strcmp(xferbuf, "\r\n") != 0) {
|
|
warnx("Unexpected data following chunk");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
}
|
|
} while (ischunked);
|
|
if (hash && !progress && bytes > 0) {
|
|
if (bytes < mark)
|
|
(void)putc('#', ttyout);
|
|
(void)putc('\n', ttyout);
|
|
}
|
|
if (ferror(fin)) {
|
|
warn("Reading file");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
progressmeter(1);
|
|
(void)fflush(fout);
|
|
if (closefunc == fclose && mtime != -1) {
|
|
struct timeval tval[2];
|
|
|
|
(void)gettimeofday(&tval[0], NULL);
|
|
tval[1].tv_sec = mtime;
|
|
tval[1].tv_usec = 0;
|
|
(*closefunc)(fout);
|
|
fout = NULL;
|
|
|
|
if (utimes(savefile, tval) == -1) {
|
|
fprintf(ttyout,
|
|
"Can't change modification time to %s",
|
|
asctime(localtime(&mtime)));
|
|
}
|
|
}
|
|
if (bytes > 0)
|
|
ptransfer(0);
|
|
bytes = 0;
|
|
|
|
rval = 0;
|
|
goto cleanup_fetch_url;
|
|
|
|
improper:
|
|
warnx("Improper response from `%s'", host);
|
|
|
|
cleanup_fetch_url:
|
|
if (oldintr)
|
|
(void)xsignal(SIGINT, oldintr);
|
|
if (oldintp)
|
|
(void)xsignal(SIGPIPE, oldintp);
|
|
if (fin != NULL)
|
|
fclose(fin);
|
|
else if (s != -1)
|
|
close(s);
|
|
if (closefunc != NULL && fout != NULL)
|
|
(*closefunc)(fout);
|
|
FREEPTR(savefile);
|
|
FREEPTR(user);
|
|
FREEPTR(pass);
|
|
FREEPTR(host);
|
|
FREEPTR(port);
|
|
FREEPTR(path);
|
|
FREEPTR(decodedpath);
|
|
FREEPTR(puser);
|
|
FREEPTR(ppass);
|
|
FREEPTR(buf);
|
|
FREEPTR(auth);
|
|
FREEPTR(location);
|
|
FREEPTR(message);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Abort a HTTP retrieval
|
|
*/
|
|
void
|
|
aborthttp(int notused)
|
|
{
|
|
char msgbuf[100];
|
|
int len;
|
|
|
|
alarmtimer(0);
|
|
len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
|
|
write(fileno(ttyout), msgbuf, len);
|
|
siglongjmp(httpabort, 1);
|
|
}
|
|
|
|
/*
|
|
* Retrieve ftp URL or classic ftp argument using FTP.
|
|
* Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
|
|
* is still open (e.g, ftp xfer with trailing /)
|
|
*/
|
|
static int
|
|
fetch_ftp(const char *url)
|
|
{
|
|
char *cp, *xargv[5], rempath[MAXPATHLEN];
|
|
char *host, *path, *dir, *file, *user, *pass;
|
|
char *port;
|
|
int dirhasglob, filehasglob, oautologin, rval, type, xargc;
|
|
in_port_t portnum;
|
|
url_t urltype;
|
|
|
|
host = path = dir = file = user = pass = NULL;
|
|
port = NULL;
|
|
rval = 1;
|
|
type = TYPE_I;
|
|
|
|
if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
|
|
if ((parse_url(url, "URL", &urltype, &user, &pass,
|
|
&host, &port, &portnum, &path) == -1) ||
|
|
(user != NULL && *user == '\0') ||
|
|
(pass != NULL && *pass == '\0') ||
|
|
EMPTYSTRING(host)) {
|
|
warnx("Invalid URL `%s'", url);
|
|
goto cleanup_fetch_ftp;
|
|
}
|
|
url_decode(user);
|
|
url_decode(pass);
|
|
/*
|
|
* Note: Don't url_decode(path) here. We need to keep the
|
|
* distinction between "/" and "%2F" until later.
|
|
*/
|
|
|
|
/* check for trailing ';type=[aid]' */
|
|
if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
|
|
if (strcasecmp(cp, ";type=a") == 0)
|
|
type = TYPE_A;
|
|
else if (strcasecmp(cp, ";type=i") == 0)
|
|
type = TYPE_I;
|
|
else if (strcasecmp(cp, ";type=d") == 0) {
|
|
warnx(
|
|
"Directory listing via a URL is not supported");
|
|
goto cleanup_fetch_ftp;
|
|
} else {
|
|
warnx("Invalid suffix `%s' in URL `%s'", cp,
|
|
url);
|
|
goto cleanup_fetch_ftp;
|
|
}
|
|
*cp = 0;
|
|
}
|
|
} else { /* classic style `[user@]host:[file]' */
|
|
urltype = CLASSIC_URL_T;
|
|
host = xstrdup(url);
|
|
cp = strchr(host, '@');
|
|
if (cp != NULL) {
|
|
*cp = '\0';
|
|
user = host;
|
|
anonftp = 0; /* disable anonftp */
|
|
host = xstrdup(cp + 1);
|
|
}
|
|
cp = strchr(host, ':');
|
|
if (cp != NULL) {
|
|
*cp = '\0';
|
|
path = xstrdup(cp + 1);
|
|
}
|
|
}
|
|
if (EMPTYSTRING(host))
|
|
goto cleanup_fetch_ftp;
|
|
|
|
/* Extract the file and (if present) directory name. */
|
|
dir = path;
|
|
if (! EMPTYSTRING(dir)) {
|
|
/*
|
|
* If we are dealing with classic `[user@]host:[path]' syntax,
|
|
* then a path of the form `/file' (resulting from input of the
|
|
* form `host:/file') means that we should do "CWD /" before
|
|
* retrieving the file. So we set dir="/" and file="file".
|
|
*
|
|
* But if we are dealing with URLs like `ftp://host/path' then
|
|
* a path of the form `/file' (resulting from a URL of the form
|
|
* `ftp://host//file') means that we should do `CWD ' (with an
|
|
* empty argument) before retrieving the file. So we set
|
|
* dir="" and file="file".
|
|
*
|
|
* If the path does not contain / at all, we set dir=NULL.
|
|
* (We get a path without any slashes if we are dealing with
|
|
* classic `[user@]host:[file]' or URL `ftp://host/file'.)
|
|
*
|
|
* In all other cases, we set dir to a string that does not
|
|
* include the final '/' that separates the dir part from the
|
|
* file part of the path. (This will be the empty string if
|
|
* and only if we are dealing with a path of the form `/file'
|
|
* resulting from an URL of the form `ftp://host//file'.)
|
|
*/
|
|
cp = strrchr(dir, '/');
|
|
if (cp == dir && urltype == CLASSIC_URL_T) {
|
|
file = cp + 1;
|
|
dir = "/";
|
|
} else if (cp != NULL) {
|
|
*cp++ = '\0';
|
|
file = cp;
|
|
} else {
|
|
file = dir;
|
|
dir = NULL;
|
|
}
|
|
} else
|
|
dir = NULL;
|
|
if (urltype == FTP_URL_T && file != NULL) {
|
|
url_decode(file);
|
|
/* but still don't url_decode(dir) */
|
|
}
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"fetch_ftp: user `%s' pass `%s' host %s port %s "
|
|
"path `%s' dir `%s' file `%s'\n",
|
|
user ? user : "<null>", pass ? pass : "<null>",
|
|
host ? host : "<null>", port ? port : "<null>",
|
|
path ? path : "<null>",
|
|
dir ? dir : "<null>", file ? file : "<null>");
|
|
|
|
dirhasglob = filehasglob = 0;
|
|
if (doglob && urltype == CLASSIC_URL_T) {
|
|
if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
|
|
dirhasglob = 1;
|
|
if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
|
|
filehasglob = 1;
|
|
}
|
|
|
|
/* Set up the connection */
|
|
if (connected)
|
|
disconnect(0, NULL);
|
|
xargv[0] = (char *)getprogname(); /* XXX discards const */
|
|
xargv[1] = host;
|
|
xargv[2] = NULL;
|
|
xargc = 2;
|
|
if (port) {
|
|
xargv[2] = port;
|
|
xargv[3] = NULL;
|
|
xargc = 3;
|
|
}
|
|
oautologin = autologin;
|
|
/* don't autologin in setpeer(), use ftp_login() below */
|
|
autologin = 0;
|
|
setpeer(xargc, xargv);
|
|
autologin = oautologin;
|
|
if ((connected == 0) ||
|
|
(connected == 1 && !ftp_login(host, user, pass))) {
|
|
warnx("Can't connect or login to host `%s'", host);
|
|
goto cleanup_fetch_ftp;
|
|
}
|
|
|
|
switch (type) {
|
|
case TYPE_A:
|
|
setascii(1, xargv);
|
|
break;
|
|
case TYPE_I:
|
|
setbinary(1, xargv);
|
|
break;
|
|
default:
|
|
errx(1, "fetch_ftp: unknown transfer type %d", type);
|
|
}
|
|
|
|
/*
|
|
* Change directories, if necessary.
|
|
*
|
|
* Note: don't use EMPTYSTRING(dir) below, because
|
|
* dir=="" means something different from dir==NULL.
|
|
*/
|
|
if (dir != NULL && !dirhasglob) {
|
|
char *nextpart;
|
|
|
|
/*
|
|
* If we are dealing with a classic `[user@]host:[path]'
|
|
* (urltype is CLASSIC_URL_T) then we have a raw directory
|
|
* name (not encoded in any way) and we can change
|
|
* directories in one step.
|
|
*
|
|
* If we are dealing with an `ftp://host/path' URL
|
|
* (urltype is FTP_URL_T), then RFC 1738 says we need to
|
|
* send a separate CWD command for each unescaped "/"
|
|
* in the path, and we have to interpret %hex escaping
|
|
* *after* we find the slashes. It's possible to get
|
|
* empty components here, (from multiple adjacent
|
|
* slashes in the path) and RFC 1738 says that we should
|
|
* still do `CWD ' (with a null argument) in such cases.
|
|
*
|
|
* Many ftp servers don't support `CWD ', so if there's an
|
|
* error performing that command, bail out with a descriptive
|
|
* message.
|
|
*
|
|
* Examples:
|
|
*
|
|
* host: dir="", urltype=CLASSIC_URL_T
|
|
* logged in (to default directory)
|
|
* host:file dir=NULL, urltype=CLASSIC_URL_T
|
|
* "RETR file"
|
|
* host:dir/ dir="dir", urltype=CLASSIC_URL_T
|
|
* "CWD dir", logged in
|
|
* ftp://host/ dir="", urltype=FTP_URL_T
|
|
* logged in (to default directory)
|
|
* ftp://host/dir/ dir="dir", urltype=FTP_URL_T
|
|
* "CWD dir", logged in
|
|
* ftp://host/file dir=NULL, urltype=FTP_URL_T
|
|
* "RETR file"
|
|
* ftp://host//file dir="", urltype=FTP_URL_T
|
|
* "CWD ", "RETR file"
|
|
* host:/file dir="/", urltype=CLASSIC_URL_T
|
|
* "CWD /", "RETR file"
|
|
* ftp://host///file dir="/", urltype=FTP_URL_T
|
|
* "CWD ", "CWD ", "RETR file"
|
|
* ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
|
|
* "CWD /", "RETR file"
|
|
* ftp://host/foo/file dir="foo", urltype=FTP_URL_T
|
|
* "CWD foo", "RETR file"
|
|
* ftp://host/foo/bar/file dir="foo/bar"
|
|
* "CWD foo", "CWD bar", "RETR file"
|
|
* ftp://host//foo/bar/file dir="/foo/bar"
|
|
* "CWD ", "CWD foo", "CWD bar", "RETR file"
|
|
* ftp://host/foo//bar/file dir="foo//bar"
|
|
* "CWD foo", "CWD ", "CWD bar", "RETR file"
|
|
* ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
|
|
* "CWD /", "CWD foo", "CWD bar", "RETR file"
|
|
* ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
|
|
* "CWD /foo", "CWD bar", "RETR file"
|
|
* ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
|
|
* "CWD /foo/bar", "RETR file"
|
|
* ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
|
|
* "RETR /foo/bar/file"
|
|
*
|
|
* Note that we don't need `dir' after this point.
|
|
*/
|
|
do {
|
|
if (urltype == FTP_URL_T) {
|
|
nextpart = strchr(dir, '/');
|
|
if (nextpart) {
|
|
*nextpart = '\0';
|
|
nextpart++;
|
|
}
|
|
url_decode(dir);
|
|
} else
|
|
nextpart = NULL;
|
|
if (debug)
|
|
fprintf(ttyout, "dir `%s', nextpart `%s'\n",
|
|
dir ? dir : "<null>",
|
|
nextpart ? nextpart : "<null>");
|
|
if (urltype == FTP_URL_T || *dir != '\0') {
|
|
xargv[0] = "cd";
|
|
xargv[1] = dir;
|
|
xargv[2] = NULL;
|
|
dirchange = 0;
|
|
cd(2, xargv);
|
|
if (! dirchange) {
|
|
if (*dir == '\0' && code == 500)
|
|
fprintf(stderr,
|
|
"\n"
|
|
"ftp: The `CWD ' command (without a directory), which is required by\n"
|
|
" RFC 1738 to support the empty directory in the URL pathname (`//'),\n"
|
|
" conflicts with the server's conformance to RFC 959.\n"
|
|
" Try the same URL without the `//' in the URL pathname.\n"
|
|
"\n");
|
|
goto cleanup_fetch_ftp;
|
|
}
|
|
}
|
|
dir = nextpart;
|
|
} while (dir != NULL);
|
|
}
|
|
|
|
if (EMPTYSTRING(file)) {
|
|
rval = -1;
|
|
goto cleanup_fetch_ftp;
|
|
}
|
|
|
|
if (dirhasglob) {
|
|
(void)strlcpy(rempath, dir, sizeof(rempath));
|
|
(void)strlcat(rempath, "/", sizeof(rempath));
|
|
(void)strlcat(rempath, file, sizeof(rempath));
|
|
file = rempath;
|
|
}
|
|
|
|
/* Fetch the file(s). */
|
|
xargc = 2;
|
|
xargv[0] = "get";
|
|
xargv[1] = file;
|
|
xargv[2] = NULL;
|
|
if (dirhasglob || filehasglob) {
|
|
int ointeractive;
|
|
|
|
ointeractive = interactive;
|
|
interactive = 0;
|
|
xargv[0] = "mget";
|
|
mget(xargc, xargv);
|
|
interactive = ointeractive;
|
|
} else {
|
|
if (outfile == NULL) {
|
|
cp = strrchr(file, '/'); /* find savefile */
|
|
if (cp != NULL)
|
|
outfile = cp + 1;
|
|
else
|
|
outfile = file;
|
|
}
|
|
xargv[2] = (char *)outfile;
|
|
xargv[3] = NULL;
|
|
xargc++;
|
|
if (restartautofetch)
|
|
reget(xargc, xargv);
|
|
else
|
|
get(xargc, xargv);
|
|
}
|
|
|
|
if ((code / 100) == COMPLETE)
|
|
rval = 0;
|
|
|
|
cleanup_fetch_ftp:
|
|
FREEPTR(host);
|
|
FREEPTR(path);
|
|
FREEPTR(user);
|
|
FREEPTR(pass);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Retrieve the given file to outfile.
|
|
* Supports arguments of the form:
|
|
* "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
|
|
* call fetch_ftp()
|
|
* "http://host/path" call fetch_url() to use HTTP
|
|
* "file:///path" call fetch_url() to copy
|
|
* "about:..." print a message
|
|
*
|
|
* Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
|
|
* is still open (e.g, ftp xfer with trailing /)
|
|
*/
|
|
static int
|
|
go_fetch(const char *url)
|
|
{
|
|
char *proxy;
|
|
|
|
/*
|
|
* Check for about:*
|
|
*/
|
|
if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) {
|
|
url += sizeof(ABOUT_URL) -1;
|
|
if (strcasecmp(url, "ftp") == 0 ||
|
|
strcasecmp(url, "tnftp") == 0) {
|
|
fputs(
|
|
"This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
|
|
"for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
|
|
} else if (strcasecmp(url, "lukem") == 0) {
|
|
fputs(
|
|
"Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
|
|
"Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
|
|
} else if (strcasecmp(url, "netbsd") == 0) {
|
|
fputs(
|
|
"NetBSD is a freely available and redistributable UNIX-like operating system.\n"
|
|
"For more information, see http://www.NetBSD.org/\n", ttyout);
|
|
} else if (strcasecmp(url, "version") == 0) {
|
|
fprintf(ttyout, "Version: %s %s%s\n",
|
|
FTP_PRODUCT, FTP_VERSION,
|
|
#ifdef INET6
|
|
""
|
|
#else
|
|
" (-IPv6)"
|
|
#endif
|
|
);
|
|
} else {
|
|
fprintf(ttyout, "`%s' is an interesting topic.\n", url);
|
|
}
|
|
fputs("\n", ttyout);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check for file:// and http:// URLs.
|
|
*/
|
|
if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 ||
|
|
strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0)
|
|
return (fetch_url(url, NULL, NULL, NULL));
|
|
|
|
/*
|
|
* Try FTP URL-style and host:file arguments next.
|
|
* If ftpproxy is set with an FTP URL, use fetch_url()
|
|
* Othewise, use fetch_ftp().
|
|
*/
|
|
proxy = getoptionvalue("ftp_proxy");
|
|
if (!EMPTYSTRING(proxy) &&
|
|
strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0)
|
|
return (fetch_url(url, NULL, NULL, NULL));
|
|
|
|
return (fetch_ftp(url));
|
|
}
|
|
|
|
/*
|
|
* Retrieve multiple files from the command line,
|
|
* calling go_fetch() for each file.
|
|
*
|
|
* If an ftp path has a trailing "/", the path will be cd-ed into and
|
|
* the connection remains open, and the function will return -1
|
|
* (to indicate the connection is alive).
|
|
* If an error occurs the return value will be the offset+1 in
|
|
* argv[] of the file that caused a problem (i.e, argv[x]
|
|
* returns x+1)
|
|
* Otherwise, 0 is returned if all files retrieved successfully.
|
|
*/
|
|
int
|
|
auto_fetch(int argc, char *argv[])
|
|
{
|
|
volatile int argpos;
|
|
int rval;
|
|
|
|
argpos = 0;
|
|
|
|
if (sigsetjmp(toplevel, 1)) {
|
|
if (connected)
|
|
disconnect(0, NULL);
|
|
return (argpos + 1);
|
|
}
|
|
(void)xsignal(SIGINT, intr);
|
|
(void)xsignal(SIGPIPE, lostpeer);
|
|
|
|
/*
|
|
* Loop through as long as there's files to fetch.
|
|
*/
|
|
for (rval = 0; (rval == 0) && (argpos < argc); argpos++) {
|
|
if (strchr(argv[argpos], ':') == NULL)
|
|
break;
|
|
redirect_loop = 0;
|
|
if (!anonftp)
|
|
anonftp = 2; /* Handle "automatic" transfers. */
|
|
rval = go_fetch(argv[argpos]);
|
|
if (outfile != NULL && strcmp(outfile, "-") != 0
|
|
&& outfile[0] != '|')
|
|
outfile = NULL;
|
|
if (rval > 0)
|
|
rval = argpos + 1;
|
|
}
|
|
|
|
if (connected && rval != -1)
|
|
disconnect(0, NULL);
|
|
return (rval);
|
|
}
|
|
|
|
|
|
int
|
|
auto_put(int argc, char **argv, const char *uploadserver)
|
|
{
|
|
char *uargv[4], *path, *pathsep;
|
|
int uargc, rval, len;
|
|
|
|
uargc = 0;
|
|
uargv[uargc++] = "mput";
|
|
uargv[uargc++] = argv[0];
|
|
uargv[2] = uargv[3] = NULL;
|
|
pathsep = NULL;
|
|
rval = 1;
|
|
|
|
if (debug)
|
|
fprintf(ttyout, "auto_put: target `%s'\n", uploadserver);
|
|
|
|
path = xstrdup(uploadserver);
|
|
len = strlen(path);
|
|
if (path[len - 1] != '/' && path[len - 1] != ':') {
|
|
/*
|
|
* make sure we always pass a directory to auto_fetch
|
|
*/
|
|
if (argc > 1) { /* more than one file to upload */
|
|
int len;
|
|
|
|
len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
|
|
free(path);
|
|
path = (char *)xmalloc(len);
|
|
(void)strlcpy(path, uploadserver, len);
|
|
(void)strlcat(path, "/", len);
|
|
} else { /* single file to upload */
|
|
uargv[0] = "put";
|
|
pathsep = strrchr(path, '/');
|
|
if (pathsep == NULL) {
|
|
pathsep = strrchr(path, ':');
|
|
if (pathsep == NULL) {
|
|
warnx("Invalid URL `%s'", path);
|
|
goto cleanup_auto_put;
|
|
}
|
|
pathsep++;
|
|
uargv[2] = xstrdup(pathsep);
|
|
pathsep[0] = '/';
|
|
} else
|
|
uargv[2] = xstrdup(pathsep + 1);
|
|
pathsep[1] = '\0';
|
|
uargc++;
|
|
}
|
|
}
|
|
if (debug)
|
|
fprintf(ttyout, "auto_put: URL `%s' argv[2] `%s'\n",
|
|
path, uargv[2] ? uargv[2] : "<null>");
|
|
|
|
/* connect and cwd */
|
|
rval = auto_fetch(1, &path);
|
|
free(path);
|
|
if(rval >= 0)
|
|
goto cleanup_auto_put;
|
|
|
|
/* XXX : is this the best way? */
|
|
if (uargc == 3) {
|
|
uargv[1] = argv[0];
|
|
put(uargc, uargv);
|
|
goto cleanup_auto_put;
|
|
}
|
|
|
|
for(; argv[0] != NULL; argv++) {
|
|
uargv[1] = argv[0];
|
|
mput(uargc, uargv);
|
|
}
|
|
rval = 0;
|
|
|
|
cleanup_auto_put:
|
|
FREEPTR(uargv[2]);
|
|
return (rval);
|
|
}
|