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225 lines
5.3 KiB
C
225 lines
5.3 KiB
C
/*-
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* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
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* All rights reserved.
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: fetch.c,v 1.1.1.1 1998/07/09 16:52:42 des Exp $
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <ctype.h>
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#include <netdb.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 "fetch.h"
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#ifndef NDEBUG
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#define DEBUG(x) do x; while (0)
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#else
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#define DEBUG(x) do { } while (0)
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#endif
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int fetchLastErrCode;
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const char *fetchLastErrText;
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/* get URL */
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FILE *
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fetchGetURL(char *URL, char *flags)
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{
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url_t *u;
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FILE *f;
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/* parse URL */
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if ((u = fetchParseURL(URL)) == NULL)
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return NULL;
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/* select appropriate function */
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if (strcasecmp(u->scheme, "file") == 0)
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f = fetchGetFile(u, flags);
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else if (strcasecmp(u->scheme, "http") == 0)
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f = fetchGetHTTP(u, flags);
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else if (strcasecmp(u->scheme, "ftp") == 0)
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f = fetchGetFTP(u, flags);
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else f = NULL;
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fetchFreeURL(u);
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return f;
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}
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/* put URL */
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FILE *
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fetchPutURL(char *URL, char *flags)
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{
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url_t *u;
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FILE *f;
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/* parse URL */
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if ((u = fetchParseURL(URL)) == NULL)
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return NULL;
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/* select appropriate function */
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if (strcasecmp(u->scheme, "file") == 0)
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f = fetchPutFile(u, flags);
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else if (strcasecmp(u->scheme, "http") == 0)
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f = fetchPutHTTP(u, flags);
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else if (strcasecmp(u->scheme, "ftp") == 0)
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f = fetchPutFTP(u, flags);
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else f = NULL;
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fetchFreeURL(u);
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return f;
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}
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/*
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* Split an URL into components. URL syntax is:
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* method:[//[user[:pwd]@]host[:port]]/[document]
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* This almost, but not quite, RFC1738 URL syntax.
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*/
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url_t *
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fetchParseURL(char *URL)
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{
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char *p, *q;
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url_t *u;
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int i;
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/* allocate url_t */
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if ((u = calloc(1, sizeof(url_t))) == NULL)
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return NULL;
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/* scheme name */
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for (i = 0; *URL && (*URL != ':'); URL++)
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if (i < URL_SCHEMELEN)
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u->scheme[i++] = *URL;
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if (!URL[0] || (URL[1] != '/'))
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goto ouch;
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else URL++;
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if (URL[1] != '/') {
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p = URL;
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goto nohost;
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}
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else URL += 2;
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p = strpbrk(URL, "/@");
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if (*p == '@') {
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/* username */
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for (q = URL, i = 0; (*q != ':') && (*q != '@'); q++)
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if (i < URL_USERLEN)
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u->user[i++] = *q;
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/* password */
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if (*q == ':')
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for (q++, i = 0; (*q != ':') && (*q != '@'); q++)
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if (i < URL_PWDLEN)
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u->pwd[i++] = *q;
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p++;
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} else p = URL;
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/* hostname */
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for (i = 0; *p && (*p != '/') && (*p != ':'); p++)
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if (i < MAXHOSTNAMELEN)
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u->host[i++] = *p;
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/* port */
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if (*p == ':') {
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for (q = ++p; *q && (*q != '/'); q++)
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if (isdigit(*q))
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u->port = u->port * 10 + (*q - '0');
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else return 0; /* invalid port */
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while (*p && (*p != '/'))
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p++;
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}
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nohost:
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/* document */
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if (*p)
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u->doc = strdup(p);
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u->doc = strdup(*p ? p : "/");
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if (!u->doc)
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goto ouch;
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DEBUG(fprintf(stderr,
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"scheme: [\033[1m%s\033[m]\n"
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"user: [\033[1m%s\033[m]\n"
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"password: [\033[1m%s\033[m]\n"
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"host: [\033[1m%s\033[m]\n"
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"port: [\033[1m%d\033[m]\n"
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"document: [\033[1m%s\033[m]\n",
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u->scheme, u->user, u->pwd,
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u->host, u->port, u->doc));
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return u;
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ouch:
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free(u);
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return NULL;
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}
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void
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fetchFreeURL(url_t *u)
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{
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if (u) {
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if (u->doc)
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free(u->doc);
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free(u);
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}
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}
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int
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fetchConnect(char *host, int port)
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{
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struct sockaddr_in sin;
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struct hostent *he;
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int sd;
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/* look up host name */
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if ((he = gethostbyname(host)) == NULL)
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return -1;
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/* set up socket address structure */
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bzero(&sin, sizeof(sin));
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bcopy(he->h_addr, (char *)&sin.sin_addr, he->h_length);
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sin.sin_family = he->h_addrtype;
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sin.sin_port = htons(port);
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/* try to connect */
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if ((sd = socket(sin.sin_family, SOCK_STREAM, IPPROTO_TCP)) < 0)
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return -1;
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if (connect(sd, (struct sockaddr *)&sin, sizeof sin) < 0) {
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close(sd);
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return -1;
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}
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return sd;
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}
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