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-
- /* ====================================================================
- * Copyright (c) 1995 The Apache Group. 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.
- *
- * 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. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 5. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED 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 APACHE GROUP OR
- * IT'S CONTRIBUTORS 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.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
-
- /*
- * This imagemap module is essentially a port of the original imagemap.c
- * written by Rob McCool (11/13/93 robm@ncsa.uiuc.edu).
- * This version includes the mapping algorithms found in version 1.3
- * of imagemap.c.
- *
- * Contributors to this code include:
- *
- * Kevin Hughes, kevinh@pulua.hcc.hawaii.edu
- *
- * Eric Haines, erich@eye.com
- * "macmartinized" polygon code copyright 1992 by Eric Haines, erich@eye.com
- *
- * Randy Terbush, randy@zyzzyva.com
- * port to Apache module format, "base_uri" and support for relative URLs
- *
- * James H. Cloos, Jr., cloos@jhcloos.com
- * Added point datatype, using code in NCSA's version 1.8 imagemap.c
- * program, as distributed with version 1.4.1 of their server.
- * The point code is originally added by Craig Milo Rogers, Rogers@ISI.Edu
- *
- */
-
-
- #include "httpd.h"
- #include "http_config.h"
- #include "http_request.h"
- #include "http_core.h"
- #include "http_protocol.h"
- #include "http_main.h"
- #include "http_log.h"
- #include "util_script.h"
-
- #define IMAP_MAGIC_TYPE "application/x-httpd-imap"
- #define MAXLINE 500
- #define MAXVERTS 100
- #define X 0
- #define Y 1
-
- char *getline(char *, int, FILE *);
-
- module imap_module;
-
- int pointinrect(double point[2], double coords[MAXVERTS][2])
- {
- return ((point[X] >= coords[0][X] && point[X] <= coords[1][X]) &&
- (point[Y] >= coords[0][Y] && point[Y] <= coords[1][Y]));
- }
-
- int pointincircle(double point[2], double coords[MAXVERTS][2])
- {
- int radius1, radius2;
-
- radius1 = ((coords[0][Y] - coords[1][Y]) * (coords[0][Y] - coords[1][Y]))
- + ((coords[0][X] - coords[1][X]) * (coords[0][X] - coords[1][X]));
-
- radius2 = ((coords[0][Y] - point[Y]) * (coords[0][Y] - point[Y]))
- + ((coords[0][X] - point[X]) * (coords[0][X] - point[X]));
-
- return (radius2 <= radius1);
- }
-
- int pointinpoly(double point[2], double pgon[MAXVERTS][2])
- {
- int i, numverts, inside_flag, xflag0;
- int crossings;
- double *p, *stop;
- double tx, ty, y;
-
- for (i = 0; pgon[i][X] != -1 && i < MAXVERTS; i++);
-
- numverts = i;
- crossings = 0;
-
- tx = point[X];
- ty = point[Y];
- y = pgon[numverts - 1][Y];
-
- p = (double *) pgon + 1;
- if ((y >= ty) != (*p >= ty)) {
-
- if ((xflag0 = (pgon[numverts - 1][X] >= tx)) == (*(double *) pgon >= tx)) {
- if (xflag0)
- crossings++;
- }
- else {
- crossings += (pgon[numverts - 1][X] - (y - ty) *
- (*(double *) pgon - pgon[numverts - 1][X]) /
- (*p - y)) >= tx;
- }
- }
-
- stop = pgon[numverts];
-
- for (y = *p, p += 2; p < stop; y = *p, p += 2) {
-
- if (y >= ty) {
-
- while ((p < stop) && (*p >= ty))
- p += 2;
-
- if (p >= stop)
- break;
- if ((xflag0 = (*(p - 3) >= tx)) == (*(p - 1) >= tx)) {
-
- if (xflag0)
- crossings++;
- }
- else {
- crossings += (*(p - 3) - (*(p - 2) - ty) *
- (*(p - 1) - *(p - 3)) / (*p - *(p - 2))) >= tx;
- }
- }
- else {
- while ((p < stop) && (*p < ty))
- p += 2;
-
- if (p >= stop)
- break;
-
- if ((xflag0 = (*(p - 3) >= tx)) == (*(p - 1) >= tx)) {
- if (xflag0)
- crossings++;
- }
- else {
- crossings += (*(p - 3) - (*(p - 2) - ty) *
- (*(p - 1) - *(p - 3)) / (*p - *(p - 2))) >= tx;
- }
- }
- }
-
- inside_flag = crossings & 0x01;
- return (inside_flag);
- }
-
-
- void set_redirect (request_rec *r, char *base_uri, char *mapurl) {
-
- char redirect[MAXLINE];
- char rooturl[80];
- char port[40];
- char *basedir;
- char *u,*b,*q;
- int k;
-
- server_rec *s = r->server;
-
- if (s->port != 80) {
-
- sprintf (port, "%d", s->port);
- sprintf (rooturl, "http://%s:%s", s->server_hostname, port);
- }
- else {
-
- sprintf (rooturl, "http://%s", s->server_hostname);
- }
-
- if ((!strncmp (mapurl, "http:", 5 )) ||
- !strncmp (mapurl, "mailto:", 7) ||
- !strncmp (mapurl, "ftp:", 4) ||
- !strncmp (mapurl, "telnet:", 7) ||
- !strncmp (mapurl, "news:", 5)) {
-
- strcpy (redirect, mapurl);
- }
- else if (*base_uri) {
-
- while ((u = strstr (mapurl, "..")) != NULL) {
-
- if ((k = strlen(u)) > 3) {
- mapurl = u + 3;
- }
- else {
- mapurl = u + k;
- }
-
- b = strrchr (base_uri, '/');
- *b = '\0';
- }
-
- b = strrchr (base_uri, '/'); b++;
- *b = '\0';
-
- sprintf (redirect, "%s%s", base_uri, mapurl);
- }
- else if (mapurl[0] == '/') {
-
- sprintf (redirect, "%s%s", rooturl, mapurl);
- }
- else {
-
- basedir = r->uri;
-
- q = strrchr (basedir, '/'); q++;
- *q = '\0';
-
- sprintf (redirect, "%s%s%s", rooturl, basedir, mapurl);
- }
-
- table_set (r->headers_out, "Location", redirect);
- }
-
-
- int imap_handler (request_rec *r)
- {
-
- char input[MAXLINE];
- char mapdflt[MAXLINE];
- char maptype[MAXLINE];
- char mapurl[MAXLINE];
- char base_uri[MAXLINE];
- char num[10];
- double testpoint[2], pointarray[MAXVERTS][2];
- int i, j, k;
- FILE *imap;
- char *ycoord;
- char *referer;
- double dist = 0;
- double mindist = 0;
- int sawpoint = 0;
-
-
- if (r->args == NULL) { /* Client doesn't support Imagemaps, */
- testpoint[X] = -1; /* so fake some co-ordinates so that */
- testpoint[Y] = -1; /* the default is picked. MJC 02Nov95 */
- } else {
- if (!(ycoord = strchr (r->args, ',')))
- return BAD_REQUEST;
- *ycoord++ = '\0';
- testpoint[X] = (double) atoi (r->args);
- testpoint[Y] = (double) atoi (ycoord);
- }
-
- if (!(imap = fopen (r->filename,"r")))
- return SERVER_ERROR;
-
- referer = table_get (r->headers_in, "Referer");
- base_uri[0] = '\0';
-
- while ((getline(input, MAXLINE, imap))) {
-
- if ((input[0] == '#') || (!input[0]) )
- continue;
-
- maptype[0] = '\0';
- mapurl[0] = '\0';
-
- for (i = 0; (isalpha(input[i]) || input[i] == '_') && input[i]; i++ )
- maptype[i] = input[i];
- maptype[i] = '\0';
-
- while (isspace(input[i])) ++i;
-
- for (j = 0; input[i] && !isspace(input[i]); ++i,++j)
- mapurl[j] = input[i];
- mapurl[j] = '\0';
-
- if (!strcmp (maptype, "base_uri")) {
-
- if (!strcmp (mapurl, "map")) {
-
- strcpy (base_uri, r->uri);
- }
- else if (!strcmp (mapurl, "referer")) {
-
- if (referer != NULL) {
-
- strcpy (base_uri, referer);
- }
- else {
- strcpy (base_uri, r->uri);
- }
- }
- else if ((mapurl[0] == '/') || (!strstr (mapurl, "://"))) {
-
- strcpy (base_uri, mapurl);
- }
-
- k = strlen (base_uri);
- base_uri[k] = '\0';
- continue;
- }
-
- if (!strcmp (maptype, "default")) {
-
- strcpy (mapdflt, mapurl);
- continue;
- }
-
- k = 0;
- while (input[i]) {
-
- while (isspace(input[i]) || input[i] == ',') i++;
-
- j = 0;
-
- while (isdigit(input[i]))
- num[j++] = input[i++];
-
- num[j] = '\0';
-
- if (num[0] != '\0') {
-
- pointarray[k][X] = (double) atoi(num);
- }
- else
- break;
-
- while (isspace(input[i]) || input[i] == ',') i++;
-
- j = 0;
-
- while (isdigit(input[i]))
- num[j++] = input[i++];
-
- num[j] = '\0';
-
- if (num[0] != '\0') {
- pointarray[k++][Y] = (double) atoi (num);
- }
- else {
- fclose (imap);
- return SERVER_ERROR;
- }
- }
-
- pointarray[k][X] = -1;
-
- if (!strcmp (maptype,"poly")) {
-
- if (pointinpoly (testpoint,pointarray)) {
- set_redirect (r, base_uri, mapurl);
- fclose (imap);
- return REDIRECT;
- }
- }
-
- if (!strcmp (maptype,"circle")) {
-
- if(pointincircle (testpoint,pointarray)) {
- set_redirect (r, base_uri, mapurl);
- fclose (imap);
- return REDIRECT;
- }
- }
-
- if (!strcmp (maptype,"rect")) {
-
- if (pointinrect (testpoint,pointarray)) {
- set_redirect (r, base_uri, mapurl);
- fclose (imap);
- return REDIRECT;
- }
- }
- if (!strcmp (maptype,"point")) {
- /* Don't need to take sqaure root */
- dist = ((testpoint[X] - pointarray[0][X])
- * (testpoint[X] - pointarray[0][X]))
- + ((testpoint[Y] - pointarray[0][Y])
- * (testpoint[Y] - pointarray[0][Y]));
- /* If this is the first point, or the nearest, set the default. */
- if ((! sawpoint) || (dist < mindist)) {
- mindist = dist;
- strcpy(mapdflt,mapurl);
- }
- sawpoint++;
- }
- }
-
- if (mapdflt[0]) {
-
- set_redirect (r, base_uri, mapdflt);
- fclose(imap);
- return REDIRECT;
- }
-
- fclose (imap);
- return SERVER_ERROR;
- }
-
- handler_rec imap_handlers[] = {
- { IMAP_MAGIC_TYPE, imap_handler },
- { NULL }
- };
-
- module imap_module = {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- NULL, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- NULL, /* server config */
- NULL, /* merge server config */
- NULL, /* command table */
- imap_handlers, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- NULL, /* fixups */
- NULL /* logger */
- };
-