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/*-
* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
* All rights reserved.
*
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $Id: fetch.c,v 1.3 1998/07/11 21:29:07 des Exp $
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <ctype.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "fetch.h"
#ifndef NDEBUG
#define DEBUG(x) do x; while (0)
#else
#define DEBUG(x) do { } while (0)
#endif
int fetchLastErrCode;
const char *fetchLastErrText;
FILE *
fetchGet(url_t *URL, char *flags)
{
if (strcasecmp(URL->scheme, "file") == 0)
return fetchGetFile(URL, flags);
else if (strcasecmp(URL->scheme, "http") == 0)
return fetchGetHTTP(URL, flags);
else if (strcasecmp(URL->scheme, "ftp") == 0)
return fetchGetFTP(URL, flags);
else return NULL;
}
FILE *
fetchPut(url_t *URL, char *flags)
{
if (strcasecmp(URL->scheme, "file") == 0)
return fetchPutFile(URL, flags);
else if (strcasecmp(URL->scheme, "http") == 0)
return fetchPutHTTP(URL, flags);
else if (strcasecmp(URL->scheme, "ftp") == 0)
return fetchPutFTP(URL, flags);
else return NULL;
}
/* get URL */
FILE *
fetchGetURL(char *URL, char *flags)
{
url_t *u;
FILE *f;
if ((u = fetchParseURL(URL)) == NULL)
return NULL;
f = fetchGet(u, flags);
fetchFreeURL(u);
return f;
}
/* put URL */
FILE *
fetchPutURL(char *URL, char *flags)
{
url_t *u;
FILE *f;
if ((u = fetchParseURL(URL)) == NULL)
return NULL;
f = fetchPut(u, flags);
fetchFreeURL(u);
return f;
}
/*
* Split an URL into components. URL syntax is:
* method:[//[user[:pwd]@]host[:port]]/[document]
* This almost, but not quite, RFC1738 URL syntax.
*/
url_t *
fetchParseURL(char *URL)
{
char *p, *q;
url_t *u;
int i;
/* allocate url_t */
if ((u = calloc(1, sizeof(url_t))) == NULL)
return NULL;
/* scheme name */
for (i = 0; *URL && (*URL != ':'); URL++)
if (i < URL_SCHEMELEN)
u->scheme[i++] = *URL;
if (!URL[0] || (URL[1] != '/'))
goto ouch;
else URL++;
if (URL[1] != '/') {
p = URL;
goto nohost;
}
else URL += 2;
p = strpbrk(URL, "/@");
if (*p == '@') {
/* username */
for (q = URL, i = 0; (*q != ':') && (*q != '@'); q++)
if (i < URL_USERLEN)
u->user[i++] = *q;
/* password */
if (*q == ':')
for (q++, i = 0; (*q != ':') && (*q != '@'); q++)
if (i < URL_PWDLEN)
u->pwd[i++] = *q;
p++;
} else p = URL;
/* hostname */
for (i = 0; *p && (*p != '/') && (*p != ':'); p++)
if (i < MAXHOSTNAMELEN)
u->host[i++] = *p;
/* port */
if (*p == ':') {
for (q = ++p; *q && (*q != '/'); q++)
if (isdigit(*q))
u->port = u->port * 10 + (*q - '0');
else return 0; /* invalid port */
while (*p && (*p != '/'))
p++;
}
nohost:
/* document */
if (*p)
u->doc = strdup(p);
u->doc = strdup(*p ? p : "/");
if (!u->doc)
goto ouch;
DEBUG(fprintf(stderr,
"scheme: [\033[1m%s\033[m]\n"
"user: [\033[1m%s\033[m]\n"
"password: [\033[1m%s\033[m]\n"
"host: [\033[1m%s\033[m]\n"
"port: [\033[1m%d\033[m]\n"
"document: [\033[1m%s\033[m]\n",
u->scheme, u->user, u->pwd,
u->host, u->port, u->doc));
return u;
ouch:
free(u);
return NULL;
}
void
fetchFreeURL(url_t *u)
{
if (u) {
if (u->doc)
free(u->doc);
free(u);
}
}
int
fetchConnect(char *host, int port)
{
struct sockaddr_in sin;
struct hostent *he;
int sd;
#ifndef NDEBUG
fprintf(stderr, "\033[1m---> %s:%d\033[m\n", host, port);
#endif
/* look up host name */
if ((he = gethostbyname(host)) == NULL)
return -1;
/* set up socket address structure */
bzero(&sin, sizeof(sin));
bcopy(he->h_addr, (char *)&sin.sin_addr, he->h_length);
sin.sin_family = he->h_addrtype;
sin.sin_port = htons(port);
/* try to connect */
if ((sd = socket(sin.sin_family, SOCK_STREAM, IPPROTO_TCP)) == -1)
return -1;
if (connect(sd, (struct sockaddr *)&sin, sizeof sin) == -1) {
close(sd);
return -1;
}
return sd;
}
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