123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*-
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* Copyright 1997 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <err.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 <sysexits.h>
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#include <unistd.h>
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#include "fetch.h"
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struct uri_scheme *schemes[] = {
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&http_scheme, &ftp_scheme, &file_scheme, 0
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};
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static struct uri_scheme *
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find_scheme(const char *name)
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{
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int i;
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for (i = 0; schemes[i]; i++) {
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if (strcasecmp(schemes[i]->sc_name, name) == 0)
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return schemes[i];
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}
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return 0;
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}
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void
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init_schemes(void)
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{
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int i;
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char schemebuf[32];
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const char *s, *t;
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struct uri_scheme *scp;
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for (i = 0; schemes[i]; i++) {
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if (getenv(schemes[i]->sc_proxy_envar) != 0)
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schemes[i]->sc_can_proxy = 1;
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}
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for (i = 0; schemes[i]; i++) {
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s = schemes[i]->sc_proxy_by;
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while (s && *s) {
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t = strchr(s, ',');
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if (t) {
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schemebuf[0] = '\0';
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strncat(schemebuf, s, t - s);
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s = t + 1;
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} else {
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strcpy(schemebuf, s);
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s = 0;
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}
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scp = find_scheme(schemebuf);
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if (scp && scp->sc_can_proxy) {
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schemes[i]->sc_proxyproto = scp;
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break;
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}
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}
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}
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}
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int
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parse_uri(struct fetch_state *fs, const char *uri)
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{
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const char *colon, *slash;
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char *scheme;
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struct uri_scheme *scp;
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fs->fs_status = "parsing URI";
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colon = strchr(uri, ':');
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slash = strchr(uri, '/');
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if (!colon || !slash || slash < colon) {
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warnx("%s: an absolute URI is required", uri);
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return EX_USAGE;
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}
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scheme = alloca(colon - uri + 1);
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scheme[0] = '\0';
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strncat(scheme, uri, colon - uri);
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scp = find_scheme(scheme);
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if (scp == 0) {
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warnx("%s: unknown URI scheme", scheme);
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return EX_USAGE;
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}
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if (scp->sc_proxyproto)
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return scp->sc_proxyproto->sc_proxy_parse(fs, uri);
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else
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return scp->sc_parse(fs, uri);
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}
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