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/* $OpenBSD: http.c,v 1.2 1997/01/29 22:21:32 millert Exp $ */
/*
* Copyright (c) 1996 Theo de Raadt
* Copyright (c) 1996 Brian Mitchell
*
* 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. 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.
*/
#include <sys/types.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <ctype.h>
#include <err.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/*
* This function lets you retrieve files from the WWW. It will accept
* any http:// url. It conects and retrieves the file, saving it in
* the current directory.
*
* Limitations:
* http://host does not work, nor http://host/ - you have to specifically
* specify the filename you want to transfer.
*/
int
http_fetch(url)
char *url;
{
char *hostname, *filename, basename[MAXPATHLEN] = "/";
char buf[8192], *bufp, *req = NULL;
struct sockaddr_in addr;
struct hostent *he;
FILE *write_to;
char *s, *p;
int bytes, c, d;
int sock = -1, file = -1, ret = 1;
s = url + strlen("http://");
p = strchr(s, '/');
if (p)
*p = '\0';
else
p = s + strlen(s);
if (p - s > MAXHOSTNAMELEN-1) {
warn("hostname too long");
return (1);
}
hostname = s;
filename = p + 1;
p = strrchr(filename, '/');
if (p == NULL) {
if (strlen(s) > MAXPATHLEN-1) {
warn("filename too long");
return (1);
}
strcpy(basename, filename);
} else {
p++;
if (strlen(p) > MAXPATHLEN-1) {
warn("filename too long");
return (1);
}
strcpy(basename, p);
}
if (strlen(basename) == 0)
strcpy(basename, "index.html");
req = (char *)malloc(sizeof("GET ") + strlen(filename) +3);
if (!req) {
warn("no memory");
return (1);
}
sprintf(req, "GET /%s\n", filename);
he = gethostbyname(hostname);
if (!he) {
herror("gethostbyname");
goto die;
}
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {
perror("socket");
goto die;
}
memset(&addr, 0, sizeof addr);
addr.sin_family = he->h_addrtype;
addr.sin_port = htons(80);
memcpy(&addr.sin_addr, he->h_addr, he->h_length);
if (connect(sock, (struct sockaddr *)&addr, sizeof addr) == -1) {
perror("connect");
goto die;
}
printf("Connected to %s.\n", hostname);
printf("Retrieving using: %s", req);
for (bufp = req, c = strlen(bufp); c > 0; c -= d, bufp += d) {
if ((d = write(sock, bufp, c)) <= 0)
break;
}
if (d == -1) {
perror("sending command");
goto die;
}
file = open(basename, O_CREAT|O_WRONLY|O_TRUNC, 0666);
if (!file) {
perror("fopen");
goto die;
}
bytes = 0;
while ((c = read(sock, buf, sizeof (buf))) > 0) {
bytes += c;
for (bufp = buf; c > 0; c -= d, bufp += d)
if ((d = write(file, bufp, c)) <= 0)
break;
}
if (d == -1) {
perror("failed to receive correctly");
goto die;
}
printf("Success, closing connection.\n");
ret = 0;
die:
if (sock != -1)
close(sock);
if (file != -1)
close(file);
if (req)
free(req);
return (ret);
}
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