1267 lines
30 KiB
C
1267 lines
30 KiB
C
/* $NetBSD: fetch.c,v 1.50 1999/03/08 04:36:12 lukem Exp $ */
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/*-
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* Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason Thorpe and Luke Mewburn.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: fetch.c,v 1.50 1999/03/08 04:36:12 lukem Exp $");
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#endif /* not lint */
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/*
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* FTP User Program -- Command line file retrieval
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/utsname.h>
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#include <netinet/in.h>
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#include <arpa/ftp.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#include "ftp_var.h"
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typedef enum {
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UNKNOWN_URL_T=-1,
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HTTP_URL_T,
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FTP_URL_T,
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FILE_URL_T
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} url_t;
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void aborthttp __P((int));
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static int auth_url __P((const char *, char **));
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static void base64_encode __P((const char *, size_t, char *));
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static int go_fetch __P((const char *, const char *));
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static int fetch_ftp __P((const char *, const char *));
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static int fetch_url __P((const char *, const char *, const char *,
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char *, char *));
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static int parse_url __P((const char *, const char *, url_t *, char **,
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char **, char **, in_port_t *, char **));
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static void url_decode __P((char *));
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static int redirect_loop;
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#define ABOUT_URL "about:" /* propaganda */
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#define FILE_URL "file://" /* file URL prefix */
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#define FTP_URL "ftp://" /* ftp URL prefix */
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#define HTTP_URL "http://" /* http URL prefix */
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#define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0'))
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#define FREEPTR(x) if ((x) != NULL) { free(x); (x) = NULL; }
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/*
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* Generate authorization response based on given authentication challenge.
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* Returns -1 if an error occurred, otherwise 0.
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* Sets response to a malloc(3)ed string; caller should free.
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*/
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static int
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auth_url(challenge, response)
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const char *challenge;
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char **response;
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{
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char *cp, *ep, *clear, *line, *realm, *scheme;
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char user[BUFSIZ], *pass;
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int rval;
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size_t len;
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*response = NULL;
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clear = realm = scheme = NULL;
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rval = -1;
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line = xstrdup(challenge);
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cp = line;
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if (debug)
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fprintf(ttyout, "auth_url: challenge `%s'\n", challenge);
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scheme = strsep(&cp, " ");
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#define SCHEME_BASIC "Basic"
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if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) {
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warnx("Unsupported WWW Authentication challenge - `%s'",
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challenge);
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goto cleanup_auth_url;
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}
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cp += strspn(cp, " ");
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#define REALM "realm=\""
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if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0)
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cp += sizeof(REALM) - 1;
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else {
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warnx("Unsupported WWW Authentication challenge - `%s'",
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challenge);
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goto cleanup_auth_url;
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}
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if ((ep = strchr(cp, '\"')) != NULL) {
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size_t len = ep - cp;
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realm = (char *)xmalloc(len + 1);
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strncpy(realm, cp, len);
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realm[len] = '\0';
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} else {
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warnx("Unsupported WWW Authentication challenge - `%s'",
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challenge);
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goto cleanup_auth_url;
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}
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fprintf(ttyout, "Username for `%s': ", realm);
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(void)fflush(ttyout);
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if (fgets(user, sizeof(user) - 1, stdin) == NULL)
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goto cleanup_auth_url;
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user[strlen(user) - 1] = '\0';
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pass = getpass("Password: ");
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len = strlen(user) + strlen(pass) + 1; /* user + ":" + pass */
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clear = (char *)xmalloc(len + 1);
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sprintf(clear, "%s:%s", user, pass);
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memset(pass, '\0', strlen(pass));
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/* scheme + " " + enc */
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len = strlen(scheme) + 1 + (len + 2) * 4 / 3;
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*response = (char *)xmalloc(len + 1);
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len = sprintf(*response, "%s ", scheme);
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base64_encode(clear, strlen(clear), *response + len);
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rval = 0;
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cleanup_auth_url:
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FREEPTR(clear);
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FREEPTR(line);
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FREEPTR(realm);
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return (rval);
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}
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/*
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* Encode len bytes starting at clear using base64 encoding into encoded,
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* which should be at least ((len + 2) * 4 / 3 + 1) in size.
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*/
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void
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base64_encode(clear, len, encoded)
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const char *clear;
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size_t len;
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char *encoded;
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{
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static const char enc[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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char *cp;
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int i;
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cp = encoded;
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for (i = 0; i < len; i += 3) {
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*(cp++) = enc[((clear[i + 0] >> 2))];
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*(cp++) = enc[((clear[i + 0] << 4) & 0x30)
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| ((clear[i + 1] >> 4) & 0x0f)];
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*(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
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| ((clear[i + 2] >> 6) & 0x03)];
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*(cp++) = enc[((clear[i + 2] ) & 0x3f)];
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}
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*cp = '\0';
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while (i-- > len)
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*(--cp) = '=';
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}
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/*
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* Decode %xx escapes in given string, `in-place'.
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*/
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static void
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url_decode(url)
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char *url;
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{
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unsigned char *p, *q;
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if (EMPTYSTRING(url))
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return;
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p = q = url;
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#define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
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while (*p) {
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if (p[0] == '%'
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&& p[1] && isxdigit((unsigned char)p[1])
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&& p[2] && isxdigit((unsigned char)p[2])) {
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*q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
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p+=3;
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} else
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*q++ = *p++;
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}
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*q = '\0';
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}
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/*
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* Parse URL of form:
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* <type>://[<user>[:<password>@]]<host>[:<port>]/<url-path>
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* Returns -1 if a parse error occurred, otherwise 0.
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* Only permit [<user>[:<password>@]] for ftp:// URLs
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* It's the caller's responsibility to url_decode() the returned
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* user, pass and path.
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* Sets type to url_t, each of the given char ** pointers to a
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* malloc(3)ed strings of the relevant section, and port to
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* the number given, or ftpport if ftp://, or httpport if http://.
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*/
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static int
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parse_url(url, desc, type, user, pass, host, port, path)
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const char *url;
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const char *desc;
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url_t *type;
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char **user;
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char **pass;
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char **host;
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in_port_t *port;
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char **path;
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{
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char *cp, *ep, *thost;
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size_t len;
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if (url == NULL || desc == NULL || type == NULL || user == NULL
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|| pass == NULL || host == NULL || port == NULL || path == NULL)
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errx(1, "parse_url: invoked with NULL argument!");
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*type = UNKNOWN_URL_T;
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*user = *pass = *host = *path = NULL;
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*port = 0;
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if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) {
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url += sizeof(HTTP_URL) - 1;
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*type = HTTP_URL_T;
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*port = httpport;
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} else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
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url += sizeof(FTP_URL) - 1;
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*type = FTP_URL_T;
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*port = ftpport;
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} else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) {
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url += sizeof(FILE_URL) - 1;
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*type = FILE_URL_T;
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} else {
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warnx("Invalid %s `%s'", desc, url);
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cleanup_parse_url:
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FREEPTR(*user);
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FREEPTR(*pass);
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FREEPTR(*host);
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FREEPTR(*path);
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return (-1);
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}
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if (*url == '\0')
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return (0);
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/* find [user[:pass]@]host[:port] */
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ep = strchr(url, '/');
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if (ep == NULL)
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thost = xstrdup(url);
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else {
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len = ep - url;
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thost = (char *)xmalloc(len + 1);
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strncpy(thost, url, len);
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thost[len] = '\0';
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ep++; /* skip first / for all URLs */
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if (*type == FTP_URL_T) /* skip all leading /'s for ftp URLs */
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while (*ep && *ep == '/')
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ep++;
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*path = xstrdup(ep);
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}
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cp = strchr(thost, '@');
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/* look for user[:pass]@ in ftp URLs */
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if (*type == FTP_URL_T && cp != NULL) {
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anonftp = 0; /* disable anonftp */
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*user = thost;
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*cp = '\0';
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*host = xstrdup(cp + 1);
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cp = strchr(*user, ':');
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if (cp != NULL) {
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*cp = '\0';
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*pass = xstrdup(cp + 1);
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}
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} else
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*host = thost;
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|
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/* look for [:port] */
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cp = strrchr(*host, ':');
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if (cp != NULL) {
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long nport;
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*cp = '\0';
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nport = strtol(cp + 1, &ep, 10);
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if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0') {
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warnx("Invalid port `%s' in %s `%s'", cp, desc, url);
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goto cleanup_parse_url;
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}
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*port = htons((in_port_t)nport);
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}
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if (debug)
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fprintf(ttyout,
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"parse_url: user `%s' pass `%s' host %s:%d path `%s'\n",
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*user ? *user : "", *pass ? *pass : "", *host ? *host : "",
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ntohs(*port), *path ? *path : "");
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return (0);
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}
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jmp_buf httpabort;
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|
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/*
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* Retrieve URL, via a proxy if necessary, using HTTP.
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* If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
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* http_proxy as appropriate.
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* Supports HTTP redirects.
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* Returns -1 on failure, 0 on completed xfer, 1 if ftp connection
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* is still open (e.g, ftp xfer with trailing /)
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*/
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static int
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fetch_url(url, outfile, proxyenv, proxyauth, wwwauth)
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const char *url;
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const char *outfile;
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const char *proxyenv;
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char *proxyauth;
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char *wwwauth;
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{
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struct sockaddr_in sin;
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struct hostent *hp;
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volatile sig_t oldintr, oldintp;
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volatile int s;
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int ischunked, isproxy, rval, hcode;
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size_t len;
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char *cp, *ep, *buf, *savefile;
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char *auth, *location, *message;
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char *user, *pass, *host, *path, *decodedpath;
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off_t hashbytes;
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int (*closefunc) __P((FILE *));
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FILE *fin, *fout;
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time_t mtime;
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url_t urltype;
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in_port_t port;
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|
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closefunc = NULL;
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fin = fout = NULL;
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s = -1;
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buf = savefile = NULL;
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auth = location = message = NULL;
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ischunked = isproxy = 0;
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rval = 1;
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hp = NULL;
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user = pass = host = path = decodedpath = NULL;
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|
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#ifdef __GNUC__ /* shut up gcc warnings */
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(void)&closefunc;
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(void)&fin;
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(void)&fout;
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(void)&buf;
|
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(void)&savefile;
|
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(void)&rval;
|
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(void)&isproxy;
|
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#endif
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|
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if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, &path)
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== -1)
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goto cleanup_fetch_url;
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|
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if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
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&& strcasecmp(host, "localhost") != 0) {
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warnx("No support for non local file URL `%s'", url);
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goto cleanup_fetch_url;
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}
|
|
|
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if (EMPTYSTRING(path)) {
|
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if (urltype == FTP_URL_T) {
|
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rval = fetch_ftp(url, outfile);
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goto cleanup_fetch_url;
|
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}
|
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if (urltype != HTTP_URL_T || outfile == NULL) {
|
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warnx("Invalid URL (no file after host) `%s'", url);
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goto cleanup_fetch_url;
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}
|
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}
|
|
|
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decodedpath = xstrdup(path);
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url_decode(decodedpath);
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|
|
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if (outfile)
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savefile = xstrdup(outfile);
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else {
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cp = strrchr(decodedpath, '/'); /* find savefile */
|
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if (cp != NULL)
|
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savefile = xstrdup(cp + 1);
|
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else
|
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savefile = xstrdup(decodedpath);
|
|
}
|
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if (EMPTYSTRING(savefile)) {
|
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if (urltype == FTP_URL_T) {
|
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rval = fetch_ftp(url, outfile);
|
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goto cleanup_fetch_url;
|
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}
|
|
warnx("Invalid URL (no file after directory) `%s'", url);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
filesize = -1;
|
|
mtime = -1;
|
|
if (urltype == FILE_URL_T) { /* file:// URLs */
|
|
struct stat sb;
|
|
|
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direction = "copied";
|
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fin = fopen(decodedpath, "r");
|
|
if (fin == NULL) {
|
|
warn("Cannot open file `%s'", decodedpath);
|
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goto cleanup_fetch_url;
|
|
}
|
|
if (fstat(fileno(fin), &sb) == 0) {
|
|
mtime = sb.st_mtime;
|
|
filesize = sb.st_size;
|
|
}
|
|
if (verbose)
|
|
fprintf(ttyout, "Copying %s\n", decodedpath);
|
|
} else { /* ftp:// or http:// URLs */
|
|
if (proxyenv == NULL) {
|
|
if (urltype == HTTP_URL_T)
|
|
proxyenv = httpproxy;
|
|
else if (urltype == FTP_URL_T)
|
|
proxyenv = ftpproxy;
|
|
}
|
|
direction = "retrieved";
|
|
if (proxyenv != NULL) { /* use proxy */
|
|
url_t purltype;
|
|
char *puser, *ppass, *phost;
|
|
char *ppath;
|
|
|
|
isproxy = 1;
|
|
|
|
/* check URL against list of no_proxied sites */
|
|
if (no_proxy != NULL) {
|
|
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 = strchr(cp, ':')) != NULL) {
|
|
*np = '\0';
|
|
np_port =
|
|
strtol(np + 1, &ep, 10);
|
|
if (*ep != '\0')
|
|
continue;
|
|
if (port !=
|
|
htons((in_port_t)np_port))
|
|
continue;
|
|
}
|
|
plen = strlen(cp);
|
|
if (strncasecmp(host + hlen - plen,
|
|
cp, plen) == 0) {
|
|
isproxy = 0;
|
|
break;
|
|
}
|
|
}
|
|
FREEPTR(np_copy);
|
|
}
|
|
|
|
if (isproxy) {
|
|
if (parse_url(proxyenv, "proxy URL", &purltype,
|
|
&puser, &ppass, &phost, &port, &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(puser);
|
|
FREEPTR(ppass);
|
|
FREEPTR(phost);
|
|
FREEPTR(ppath);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
FREEPTR(user);
|
|
user = puser;
|
|
FREEPTR(pass);
|
|
pass = ppass;
|
|
FREEPTR(host);
|
|
host = phost;
|
|
FREEPTR(path);
|
|
FREEPTR(ppath);
|
|
path = xstrdup(url);
|
|
}
|
|
} /* proxyenv != NULL */
|
|
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
|
|
if (isdigit((unsigned char)host[0])) {
|
|
if (inet_aton(host, &sin.sin_addr) == 0) {
|
|
warnx("Invalid IP address `%s'", host);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
} else {
|
|
hp = gethostbyname(host);
|
|
if (hp == NULL) {
|
|
warnx("%s: %s", host, hstrerror(h_errno));
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (hp->h_addrtype != AF_INET) {
|
|
warnx("`%s': not an Internet address?", host);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
memcpy(&sin.sin_addr, hp->h_addr, hp->h_length);
|
|
}
|
|
|
|
if (port == 0) {
|
|
warnx("Unknown port for URL `%s'", url);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
sin.sin_port = port;
|
|
|
|
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s == -1) {
|
|
warn("Can't create socket");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
while (xconnect(s, (struct sockaddr *)&sin,
|
|
sizeof(sin)) == -1) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
if (hp && hp->h_addr_list[1]) {
|
|
int oerrno = errno;
|
|
char *ia;
|
|
|
|
ia = inet_ntoa(sin.sin_addr);
|
|
errno = oerrno;
|
|
warn("Connect to address `%s'", ia);
|
|
hp->h_addr_list++;
|
|
memcpy(&sin.sin_addr, hp->h_addr_list[0],
|
|
(size_t)hp->h_length);
|
|
if (verbose)
|
|
fprintf(ttyout, "Trying %s...\n",
|
|
inet_ntoa(sin.sin_addr));
|
|
(void)close(s);
|
|
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s < 0) {
|
|
warn("Can't create socket");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
continue;
|
|
}
|
|
warn("Can't connect to `%s'", host);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
fin = fdopen(s, "r+");
|
|
/*
|
|
* Construct and send the request.
|
|
* Proxy requests don't want leading /.
|
|
*/
|
|
if (isproxy) {
|
|
if (verbose)
|
|
fprintf(ttyout, "Requesting %s\n (via %s)\n",
|
|
url, proxyenv);
|
|
fprintf(fin, "GET %s HTTP/1.0\r\n", path);
|
|
if (flushcache)
|
|
fprintf(fin, "Pragma: no-cache\r\n");
|
|
} else {
|
|
struct utsname unam;
|
|
|
|
if (verbose)
|
|
fprintf(ttyout, "Requesting %s\n", url);
|
|
fprintf(fin, "GET %s HTTP/1.1\r\n", path);
|
|
fprintf(fin, "Host: %s:%d\r\n", host, ntohs(port));
|
|
fprintf(fin, "Accept: */*\r\n");
|
|
if (uname(&unam) != -1) {
|
|
fprintf(fin, "User-Agent: %s-%s/ftp\r\n",
|
|
unam.sysname, unam.release);
|
|
}
|
|
fprintf(fin, "Connection: close\r\n");
|
|
if (flushcache)
|
|
fprintf(fin, "Cache-Control: no-cache\r\n");
|
|
}
|
|
if (wwwauth) {
|
|
if (verbose)
|
|
fprintf(ttyout, " (with authorization)\n");
|
|
fprintf(fin, "Authorization: %s\r\n", wwwauth);
|
|
}
|
|
if (proxyauth) {
|
|
if (verbose)
|
|
fprintf(ttyout,
|
|
" (with proxy authorization)\n");
|
|
fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
|
|
}
|
|
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 = strtol(cp, &ep, 10);
|
|
if (filesize < 1 || *ep != '\0')
|
|
goto improper;
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
#ifndef NO_QUAD
|
|
"parsed length as: %qd\n",
|
|
(long long)filesize);
|
|
#else
|
|
"parsed length as: %ld\n",
|
|
(long)filesize);
|
|
#endif
|
|
|
|
#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 = mkgmtime(&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, "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);
|
|
|
|
}
|
|
|
|
}
|
|
FREEPTR(buf);
|
|
}
|
|
|
|
switch (hcode) {
|
|
case 200:
|
|
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, outfile, location, proxyauth,
|
|
wwwauth);
|
|
} else {
|
|
if (verbose)
|
|
fprintf(ttyout, "Redirected to %s\n", location);
|
|
rval = go_fetch(location, outfile);
|
|
}
|
|
goto cleanup_fetch_url;
|
|
case 401:
|
|
case 407:
|
|
{
|
|
char **authp;
|
|
|
|
fprintf(ttyout, "%s\n", message);
|
|
if (EMPTYSTRING(auth)) {
|
|
warnx("No authentication challenge provided by server");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
authp = (hcode == 401) ? &wwwauth : &proxyauth;
|
|
if (*authp != NULL) {
|
|
char reply[10];
|
|
|
|
fprintf(ttyout, "Authorization failed. Retry (y/n)? ");
|
|
if (fgets(reply, sizeof(reply), stdin) != NULL &&
|
|
tolower(reply[0]) != 'y')
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (auth_url(auth, authp) == 0) {
|
|
rval = fetch_url(url, outfile, proxyenv, proxyauth,
|
|
wwwauth);
|
|
memset(*authp, '\0', strlen(*authp));
|
|
FREEPTR(*authp);
|
|
}
|
|
goto cleanup_fetch_url;
|
|
}
|
|
default:
|
|
warnx("Error retrieving file - `%s'", message);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
|
|
oldintr = oldintp = NULL;
|
|
|
|
/* Open the output file. */
|
|
if (strcmp(savefile, "-") == 0) {
|
|
fout = stdout;
|
|
} else if (*savefile == '|') {
|
|
oldintp = signal(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 {
|
|
fout = fopen(savefile, "w");
|
|
if (fout == NULL) {
|
|
warn("Can't open `%s'", savefile);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
closefunc = fclose;
|
|
}
|
|
|
|
/* Trap signals */
|
|
if (setjmp(httpabort)) {
|
|
if (oldintr)
|
|
(void)signal(SIGINT, oldintr);
|
|
if (oldintp)
|
|
(void)signal(SIGPIPE, oldintp);
|
|
goto cleanup_fetch_url;
|
|
}
|
|
oldintr = signal(SIGINT, aborthttp);
|
|
|
|
bytes = 0;
|
|
hashbytes = mark;
|
|
progressmeter(-1);
|
|
|
|
/* Finally, suck down the file. */
|
|
buf = xmalloc(BUFSIZ + 1);
|
|
do {
|
|
ssize_t chunksize;
|
|
|
|
chunksize = 0;
|
|
/* read chunksize */
|
|
if (ischunked) {
|
|
if (fgets(buf, BUFSIZ, fin) == NULL) {
|
|
warnx("Unexpected EOF reading chunksize");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
chunksize = strtol(buf, &ep, 16);
|
|
if (strcmp(ep, "\r\n") != 0) {
|
|
warnx("Unexpected data following chunksize");
|
|
goto cleanup_fetch_url;
|
|
}
|
|
if (debug)
|
|
fprintf(ttyout, "got chunksize of %qd\n",
|
|
(long long)chunksize);
|
|
if (chunksize == 0)
|
|
break;
|
|
}
|
|
while ((len = fread(buf, sizeof(char),
|
|
ischunked ? MIN(chunksize, BUFSIZ) : BUFSIZ, fin)) > 0) {
|
|
bytes += len;
|
|
if (fwrite(buf, 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;
|
|
}
|
|
/* read CRLF after chunk*/
|
|
if (ischunked) {
|
|
if (fgets(buf, BUFSIZ, fin) == NULL)
|
|
break;
|
|
if (strcmp(buf, "\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);
|
|
(void)signal(SIGINT, oldintr);
|
|
if (oldintp)
|
|
(void)signal(SIGPIPE, oldintp);
|
|
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);
|
|
|
|
rval = 0;
|
|
goto cleanup_fetch_url;
|
|
|
|
improper:
|
|
warnx("Improper response from `%s'", host);
|
|
|
|
cleanup_fetch_url:
|
|
resetsockbufsize();
|
|
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(path);
|
|
FREEPTR(decodedpath);
|
|
FREEPTR(buf);
|
|
FREEPTR(auth);
|
|
FREEPTR(location);
|
|
FREEPTR(message);
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* Abort a HTTP retrieval
|
|
*/
|
|
void
|
|
aborthttp(notused)
|
|
int notused;
|
|
{
|
|
|
|
alarmtimer(0);
|
|
fputs("\nHTTP fetch aborted.\n", ttyout);
|
|
longjmp(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(url, outfile)
|
|
const char *url;
|
|
const char *outfile;
|
|
{
|
|
char *cp, *xargv[5], rempath[MAXPATHLEN];
|
|
char portnum[6]; /* large enough for "65535\0" */
|
|
char *host, *path, *dir, *file, *user, *pass;
|
|
in_port_t port;
|
|
int dirhasglob, filehasglob, oautologin, rval, xargc;
|
|
|
|
host = path = dir = file = user = pass = NULL;
|
|
port = 0;
|
|
rval = 1;
|
|
|
|
if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
|
|
url_t urltype;
|
|
|
|
if ((parse_url(url, "URL", &urltype, &user, &pass,
|
|
&host, &port, &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);
|
|
url_decode(path);
|
|
} else { /* classic style `host:file' */
|
|
host = xstrdup(url);
|
|
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)) {
|
|
cp = strrchr(dir, '/');
|
|
if (cp == dir) {
|
|
file = cp + 1;
|
|
dir = "/";
|
|
} else if (cp != NULL) {
|
|
*cp++ = '\0';
|
|
file = cp;
|
|
} else {
|
|
file = dir;
|
|
dir = NULL;
|
|
}
|
|
}
|
|
if (debug)
|
|
fprintf(ttyout,
|
|
"fetch_ftp: user `%s' pass `%s' host %s:%d path `%s' dir `%s' file `%s'\n",
|
|
user ? user : "", pass ? pass : "",
|
|
host ? host : "", ntohs(port), path ? path : "",
|
|
dir ? dir : "", file ? file : "");
|
|
|
|
dirhasglob = filehasglob = 0;
|
|
if (doglob) {
|
|
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] = __progname;
|
|
xargv[1] = host;
|
|
xargv[2] = NULL;
|
|
xargc = 2;
|
|
if (port) {
|
|
snprintf(portnum, sizeof(portnum), "%d", ntohs(port));
|
|
xargv[2] = portnum;
|
|
xargv[3] = NULL;
|
|
xargc = 3;
|
|
}
|
|
oautologin = autologin;
|
|
if (user != NULL)
|
|
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;
|
|
}
|
|
|
|
/* Always use binary transfers. */
|
|
setbinary(0, NULL);
|
|
|
|
/* Change directories, if necessary. */
|
|
if (! EMPTYSTRING(dir) && !dirhasglob) {
|
|
xargv[0] = "cd";
|
|
xargv[1] = dir;
|
|
xargv[2] = NULL;
|
|
dirchange = 0;
|
|
cd(2, xargv);
|
|
if (! dirchange)
|
|
goto cleanup_fetch_ftp;
|
|
}
|
|
|
|
if (EMPTYSTRING(file)) {
|
|
rval = -1;
|
|
goto cleanup_fetch_ftp;
|
|
}
|
|
|
|
if (dirhasglob) {
|
|
snprintf(rempath, sizeof(rempath), "%s/%s", dir, file);
|
|
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) {
|
|
xargv[2] = (char *)outfile;
|
|
xargv[3] = NULL;
|
|
xargc++;
|
|
}
|
|
get(xargc, xargv);
|
|
if (outfile != NULL && strcmp(outfile, "-") != 0
|
|
&& outfile[0] != '|')
|
|
outfile = NULL;
|
|
}
|
|
|
|
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(url, outfile)
|
|
const char *url;
|
|
const char *outfile;
|
|
{
|
|
|
|
#ifndef SMALL
|
|
/*
|
|
* Check for about:*
|
|
*/
|
|
if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) {
|
|
url += sizeof(ABOUT_URL) -1;
|
|
if (strcasecmp(url, "ftp") == 0) {
|
|
fprintf(ttyout, "%s\n%s\n",
|
|
"This version of ftp has been enhanced by Luke Mewburn <lukem@netbsd.org>.",
|
|
"Execute `man ftp' for more details");
|
|
} else if (strcasecmp(url, "netbsd") == 0) {
|
|
fprintf(ttyout, "%s\n%s\n",
|
|
"NetBSD is a freely available and redistributable UNIX-like operating system.",
|
|
"For more information, see http://www.netbsd.org/index.html");
|
|
} else {
|
|
fprintf(ttyout, "`%s' is an interesting topic.\n", url);
|
|
}
|
|
return (0);
|
|
}
|
|
#endif /* SMALL */
|
|
|
|
/*
|
|
* 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, outfile, 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().
|
|
*/
|
|
if (ftpproxy && strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0)
|
|
return (fetch_url(url, outfile, NULL, NULL, NULL));
|
|
|
|
return (fetch_ftp(url, outfile));
|
|
}
|
|
|
|
/*
|
|
* 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(argc, argv, outfile)
|
|
int argc;
|
|
char *argv[];
|
|
char *outfile;
|
|
{
|
|
volatile int argpos;
|
|
int rval;
|
|
|
|
argpos = 0;
|
|
|
|
if (setjmp(toplevel)) {
|
|
if (connected)
|
|
disconnect(0, NULL);
|
|
return (argpos + 1);
|
|
}
|
|
(void)signal(SIGINT, (sig_t)intr);
|
|
(void)signal(SIGPIPE, (sig_t)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;
|
|
anonftp = 1; /* Handle "automatic" transfers. */
|
|
rval = go_fetch(argv[argpos], outfile);
|
|
if (rval > 0)
|
|
rval = argpos + 1;
|
|
}
|
|
|
|
if (connected && rval != -1)
|
|
disconnect(0, NULL);
|
|
return (rval);
|
|
}
|