/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* This imagemap module started as 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
*
* Nathan Kurz, nate@tripod.com
* Rewrite/reorganization. New handling of default, base and relative URLs.
* New Configuration directives:
* ImapMenu {none, formatted, semiformatted, unformatted}
* ImapDefault {error, nocontent, referer, menu, URL}
* ImapBase {map, referer, URL}
* Support for creating non-graphical menu added. (backwards compatible):
* Old: directive URL [x,y ...]
* New: directive URL "Menu text" [x,y ...]
* or: directive URL x,y ... "Menu text"
* Map format and menu concept courtesy Joshua Bell, jsbell@acs.ucalgary.ca.
*
* Mark Cox, mark@ukweb.com, Allow relative URLs even when no base specified
*/
#include "apr.h"
#include "apr_strings.h"
#include "apr_lib.h"
#define APR_WANT_STDIO /* for sscanf() */
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "ap_config.h"
#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"
#include "mod_core.h"
#define IMAP_MAGIC_TYPE "application/x-httpd-imap"
#define MAXVERTS 100
#define X 0
#define Y 1
#define IMAP_MENU_DEFAULT "formatted"
#define IMAP_DEFAULT_DEFAULT "nocontent"
#define IMAP_BASE_DEFAULT "map"
module AP_MODULE_DECLARE_DATA imagemap_module;
typedef struct {
char *imap_menu;
char *imap_default;
char *imap_base;
} imap_conf_rec;
static void *create_imap_dir_config(apr_pool_t *p, char *dummy)
{
imap_conf_rec *icr =
(imap_conf_rec *) apr_palloc(p, sizeof(imap_conf_rec));
icr->imap_menu = NULL;
icr->imap_default = NULL;
icr->imap_base = NULL;
return icr;
}
static void *merge_imap_dir_configs(apr_pool_t *p, void *basev, void *addv)
{
imap_conf_rec *new = (imap_conf_rec *) apr_palloc(p, sizeof(imap_conf_rec));
imap_conf_rec *base = (imap_conf_rec *) basev;
imap_conf_rec *add = (imap_conf_rec *) addv;
new->imap_menu = add->imap_menu ? add->imap_menu : base->imap_menu;
new->imap_default = add->imap_default ? add->imap_default
: base->imap_default;
new->imap_base = add->imap_base ? add->imap_base : base->imap_base;
return new;
}
static const command_rec imap_cmds[] =
{
AP_INIT_TAKE1("ImapMenu", ap_set_string_slot,
(void *)APR_OFFSETOF(imap_conf_rec, imap_menu), OR_INDEXES,
"the type of menu generated: none, formatted, semiformatted, "
"unformatted"),
AP_INIT_TAKE1("ImapDefault", ap_set_string_slot,
(void *)APR_OFFSETOF(imap_conf_rec, imap_default), OR_INDEXES,
"the action taken if no match: error, nocontent, referer, "
"menu, URL"),
AP_INIT_TAKE1("ImapBase", ap_set_string_slot,
(void *)APR_OFFSETOF(imap_conf_rec, imap_base), OR_INDEXES,
"the base for all URL's: map, referer, URL (or start of)"),
{NULL}
};
static int pointinrect(const double point[2], double coords[MAXVERTS][2])
{
double max[2], min[2];
if (coords[0][X] > coords[1][X]) {
max[0] = coords[0][X];
min[0] = coords[1][X];
}
else {
max[0] = coords[1][X];
min[0] = coords[0][X];
}
if (coords[0][Y] > coords[1][Y]) {
max[1] = coords[0][Y];
min[1] = coords[1][Y];
}
else {
max[1] = coords[1][Y];
min[1] = coords[0][Y];
}
return ((point[X] >= min[0] && point[X] <= max[0]) &&
(point[Y] >= min[1] && point[Y] <= max[1]));
}
static int pointincircle(const double point[2], double coords[MAXVERTS][2])
{
double 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);
}
#define fmin(a,b) (((a)>(b))?(b):(a))
#define fmax(a,b) (((a)>(b))?(a):(b))
static int pointinpoly(const double point[2], double pgon[MAXVERTS][2])
{
int i, numverts, crossings = 0;
double x = point[X], y = point[Y];
for (numverts = 0; numverts < MAXVERTS && pgon[numverts][X] != -1;
numverts++) {
/* just counting the vertexes */
}
for (i = 0; i < numverts; i++) {
double x1=pgon[i][X];
double y1=pgon[i][Y];
double x2=pgon[(i + 1) % numverts][X];
double y2=pgon[(i + 1) % numverts][Y];
double d=(y - y1) * (x2 - x1) - (x - x1) * (y2 - y1);
if ((y1 >= y) != (y2 >= y)) {
crossings +=y2 - y1 >= 0 ? d >= 0 : d <= 0;
}
if (!d && fmin(x1,x2) <= x && x <= fmax(x1,x2)
&& fmin(y1,y2) <= y && y <= fmax(y1,y2)) {
return 1;
}
}
return crossings & 0x01;
}
static int is_closer(const double point[2], double coords[MAXVERTS][2],
double *closest)
{
double dist_squared = ((point[X] - coords[0][X])
* (point[X] - coords[0][X]))
+ ((point[Y] - coords[0][Y])
* (point[Y] - coords[0][Y]));
if (point[X] < 0 || point[Y] < 0) {
return (0); /* don't mess around with negative coordinates */
}
if (*closest < 0 || dist_squared < *closest) {
*closest = dist_squared;
return (1); /* if this is the first point or is the closest yet
set 'closest' equal to this distance^2 */
}
return (0); /* if it's not the first or closest */
}
static double get_x_coord(const char *args)
{
char *endptr; /* we want it non-null */
double x_coord = -1; /* -1 is returned if no coordinate is given */
if (args == NULL) {
return (-1); /* in case we aren't passed anything */
}
while (*args && !apr_isdigit(*args) && *args != ',') {
args++; /* jump to the first digit, but not past
a comma or end */
}
x_coord = strtod(args, &endptr);
if (endptr > args) { /* if a conversion was made */
return (x_coord);
}
return (-1); /* else if no conversion was made,
or if no args was given */
}
static double get_y_coord(const char *args)
{
char *endptr; /* we want it non-null */
const char *start_of_y = NULL;
double y_coord = -1; /* -1 is returned on error */
if (args == NULL) {
return (-1); /* in case we aren't passed anything */
}
start_of_y = ap_strchr_c(args, ','); /* the comma */
if (start_of_y) {
start_of_y++; /* start looking at the character after
the comma */
while (*start_of_y && !apr_isdigit(*start_of_y)) {
start_of_y++; /* jump to the first digit, but not
past the end */
}
y_coord = strtod(start_of_y, &endptr);
if (endptr > start_of_y) {
return (y_coord);
}
}
return (-1); /* if no conversion was made, or
no comma was found in args */
}
/* See if string has a "quoted part", and if so set *quoted_part to
* the first character of the quoted part, then hammer a \0 onto the
* trailing quote, and set *string to point at the first character
* past the second quote.
*
* Otherwise set *quoted_part to NULL, and leave *string alone.
*/
static void read_quoted(char **string, char **quoted_part)
{
char *strp = *string;
/* assume there's no quoted part */
*quoted_part = NULL;
while (apr_isspace(*strp)) {
strp++; /* go along string until non-whitespace */
}
if (*strp == '"') { /* if that character is a double quote */
strp++; /* step over it */
*quoted_part = strp; /* note where the quoted part begins */
while (*strp && *strp != '"') {
++strp; /* skip the quoted portion */
}
*strp = '\0'; /* end the string with a NUL */
strp++; /* step over the last double quote */
*string = strp;
}
}
/*
* returns the mapped URL or NULL.
*/
static const char *imap_url(request_rec *r, const char *base, const char *value)
{
/* translates a value into a URL. */
int slen, clen;
char *string_pos = NULL;
const char *string_pos_const = NULL;
char *directory = NULL;
const char *referer = NULL;
char *my_base;
if (!strcasecmp(value, "map") || !strcasecmp(value, "menu")) {
return ap_construct_url(r->pool, r->uri, r);
}
if (!strcasecmp(value, "nocontent") || !strcasecmp(value, "error")) {
return apr_pstrdup(r->pool, value); /* these are handled elsewhere,
so just copy them */
}
if (!strcasecmp(value, "referer")) {
referer = apr_table_get(r->headers_in, "Referer");
if (referer && *referer) {
return referer;
}
else {
/* XXX: This used to do *value = '\0'; ... which is totally bogus
* because it hammers the passed in value, which can be a string
* constant, or part of a config, or whatever. Total garbage.
* This works around that without changing the rest of this
* code much
*/
value = ""; /* if 'referer' but no referring page,
null the value */
}
}
string_pos_const = value;
while (apr_isalpha(*string_pos_const)) {
string_pos_const++; /* go along the URL from the map
until a non-letter */
}
if (*string_pos_const == ':') {
/* if letters and then a colon (like http:) */
/* it's an absolute URL, so use it! */
return apr_pstrdup(r->pool, value);
}
if (!base || !*base) {
if (value && *value) {
return apr_pstrdup(r->pool, value); /* no base: use what is given */
}
/* no base, no value: pick a simple default */
return ap_construct_url(r->pool, "/", r);
}
/* must be a relative URL to be combined with base */
if (ap_strchr_c(base, '/') == NULL && (!strncmp(value, "../", 3)
|| !strcmp(value, ".."))) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00677)
"invalid base directive in map file: %s", r->uri);
return NULL;
}
my_base = apr_pstrdup(r->pool, base);
string_pos = my_base;
while (*string_pos) {
if (*string_pos == '/' && *(string_pos + 1) == '/') {
string_pos += 2; /* if there are two slashes, jump over them */
continue;
}
if (*string_pos == '/') { /* the first single slash */
if (value[0] == '/') {
*string_pos = '\0';
} /* if the URL from the map starts from root,
end the base URL string at the first single
slash */
else {
directory = string_pos; /* save the start of
the directory portion */
string_pos = strrchr(string_pos, '/'); /* now reuse
string_pos */
string_pos++; /* step over that last slash */
*string_pos = '\0';
} /* but if the map url is relative, leave the
slash on the base (if there is one) */
break;
}
string_pos++; /* until we get to the end of my_base without
finding a slash by itself */
}
while (!strncmp(value, "../", 3) || !strcmp(value, "..")) {
if (directory && (slen = strlen(directory))) {
/* for each '..', knock a directory off the end
by ending the string right at the last slash.
But only consider the directory portion: don't eat
into the server name. And only try if a directory
portion was found */
clen = slen - 1;
while ((slen - clen) == 1) {
if ((string_pos = strrchr(directory, '/'))) {
*string_pos = '\0';
}
clen = strlen(directory);
if (clen == 0) {
break;
}
}
value += 2; /* jump over the '..' that we found in the
value */
}
else if (directory) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00678)
"invalid directory name in map file: %s", r->uri);
return NULL;
}
if (!strncmp(value, "/../", 4) || !strcmp(value, "/..")) {
value++; /* step over the '/' if there are more '..'
to do. This way, we leave the starting
'/' on value after the last '..', but get
rid of it otherwise */
}
} /* by this point, value does not start
with '..' */
if (value && *value) {
return apr_pstrcat(r->pool, my_base, value, NULL);
}
return my_base;
}
static int imap_reply(request_rec *r, const char *redirect)
{
if (!strcasecmp(redirect, "error")) {
/* they actually requested an error! */
return HTTP_INTERNAL_SERVER_ERROR;
}
if (!strcasecmp(redirect, "nocontent")) {
/* tell the client to keep the page it has */
return HTTP_NO_CONTENT;
}
if (redirect && *redirect) {
/* must be a URL, so redirect to it */
apr_table_setn(r->headers_out, "Location", redirect);
return HTTP_MOVED_TEMPORARILY;
}
return HTTP_INTERNAL_SERVER_ERROR;
}
static void menu_header(request_rec *r, char *menu)
{
ap_set_content_type(r, "text/html; charset=ISO-8859-1");
ap_rvputs(r, DOCTYPE_HTML_3_2, "\nMenu for ",
ap_escape_html(r->pool, r->uri),
"\n\n", NULL);
if (!strcasecmp(menu, "formatted")) {
ap_rvputs(r, "Menu for ",
ap_escape_html(r->pool, r->uri),
"
\n
\n\n", NULL);
}
}
static void menu_blank(request_rec *r, char *menu)
{
if (!strcasecmp(menu, "formatted")) {
ap_rputs("\n", r);
}
else if (!strcasecmp(menu, "semiformatted")) {
ap_rputs("
\n", r);
}
else if (!strcasecmp(menu, "unformatted")) {
ap_rputs("\n", r);
}
}
static void menu_comment(request_rec *r, char *menu, char *comment)
{
/* comments are ignored in the 'formatted' form */
if (!strcasecmp(menu, "formatted")) {
ap_rputs("\n", r); /* print just a newline if 'formatted' */
}
else if (!strcasecmp(menu, "semiformatted") && *comment) {
ap_rvputs(r, comment, "\n", NULL);
}
else if (!strcasecmp(menu, "unformatted") && *comment) {
ap_rvputs(r, comment, "\n", NULL);
}
}
static void menu_default(request_rec *r, const char *menu, const char *href, const char *text)
{
char *ehref, *etext;
if (!strcasecmp(href, "error") || !strcasecmp(href, "nocontent")) {
return; /* don't print such lines, these aren't
really href's */
}
ehref = ap_escape_uri(r->pool, href);
etext = ap_escape_html(r->pool, text);
if (!strcasecmp(menu, "formatted")) {
ap_rvputs(r, "(Default) ", etext,
"\n", NULL);
}
else if (!strcasecmp(menu, "semiformatted")) {
ap_rvputs(r, "(Default) ", etext,
"\n", NULL);
}
else if (!strcasecmp(menu, "unformatted")) {
ap_rvputs(r, "", etext, "", NULL);
}
}
static void menu_directive(request_rec *r, const char *menu, const char *href, const char *text)
{
char *ehref, *etext;
if (!strcasecmp(href, "error") || !strcasecmp(href, "nocontent")) {
return; /* don't print such lines, as this isn't
really an href */
}
ehref = ap_escape_uri(r->pool, href);
etext = ap_escape_html(r->pool, text);
if (!strcasecmp(menu, "formatted")) {
ap_rvputs(r, " ", etext,
"\n", NULL);
}
else if (!strcasecmp(menu, "semiformatted")) {
ap_rvputs(r, " ", etext,
"\n", NULL);
}
else if (!strcasecmp(menu, "unformatted")) {
ap_rvputs(r, "", etext, "", NULL);
}
}
static void menu_footer(request_rec *r)
{
ap_rputs("\n\n\n\n", r); /* finish the menu */
}
static int imap_handler_internal(request_rec *r)
{
char input[MAX_STRING_LEN];
char *directive;
char *value;
char *href_text;
const char *base;
const char *redirect;
const char *mapdflt;
char *closest = NULL;
double closest_yet = -1;
apr_status_t status;
double testpoint[2];
double pointarray[MAXVERTS + 1][2];
int vertex;
char *string_pos;
int showmenu = 0;
imap_conf_rec *icr;
char *imap_menu;
char *imap_default;
char *imap_base;
ap_configfile_t *imap;
icr = ap_get_module_config(r->per_dir_config, &imagemap_module);
imap_menu = icr->imap_menu ? icr->imap_menu : IMAP_MENU_DEFAULT;
imap_default = icr->imap_default
? icr->imap_default : IMAP_DEFAULT_DEFAULT;
imap_base = icr->imap_base ? icr->imap_base : IMAP_BASE_DEFAULT;
status = ap_pcfg_openfile(&imap, r->pool, r->filename);
if (status != APR_SUCCESS) {
return HTTP_NOT_FOUND;
}
base = imap_url(r, NULL, imap_base); /* set base according
to default */
if (!base) {
return HTTP_INTERNAL_SERVER_ERROR;
}
mapdflt = imap_url(r, NULL, imap_default); /* and default to
global default */
if (!mapdflt) {
return HTTP_INTERNAL_SERVER_ERROR;
}
testpoint[X] = get_x_coord(r->args);
testpoint[Y] = get_y_coord(r->args);
if ((testpoint[X] == -1 || testpoint[Y] == -1) ||
(testpoint[X] == 0 && testpoint[Y] == 0)) {
/* if either is -1 or if both are zero (new Lynx) */
/* we don't have valid coordinates */
testpoint[X] = -1;
testpoint[Y] = -1;
if (strncasecmp(imap_menu, "none", 2)) {
showmenu = 1; /* show the menu _unless_ ImapMenu is
'none' or 'no' */
}
}
if (showmenu) { /* send start of imagemap menu if
we're going to */
menu_header(r, imap_menu);
}
while (!ap_cfg_getline(input, sizeof(input), imap)) {
if (!input[0]) {
if (showmenu) {
menu_blank(r, imap_menu);
}
continue;
}
if (input[0] == '#') {
if (showmenu) {
menu_comment(r, imap_menu, input + 1);
}
continue;
} /* blank lines and comments are ignored
if we aren't printing a menu */
/* find the first two space delimited fields, recall that
* ap_cfg_getline has removed leading/trailing whitespace.
*
* note that we're tokenizing as we go... if we were to use the
* ap_getword() class of functions we would end up allocating extra
* memory for every line of the map file
*/
string_pos = input;
if (!*string_pos) { /* need at least two fields */
goto need_2_fields;
}
directive = string_pos;
while (*string_pos && !apr_isspace(*string_pos)) { /* past directive */
++string_pos;
}
if (!*string_pos) { /* need at least two fields */
goto need_2_fields;
}
*string_pos++ = '\0';
if (!*string_pos) { /* need at least two fields */
goto need_2_fields;
}
while (apr_isspace(*string_pos)) { /* past whitespace */
++string_pos;
}
value = string_pos;
while (*string_pos && !apr_isspace(*string_pos)) { /* past value */
++string_pos;
}
if (apr_isspace(*string_pos)) {
*string_pos++ = '\0';
}
else {
/* end of input, don't advance past it */
*string_pos = '\0';
}
if (!strncasecmp(directive, "base", 4)) { /* base, base_uri */
base = imap_url(r, NULL, value);
if (!base) {
goto menu_bail;
}
continue; /* base is never printed to a menu */
}
read_quoted(&string_pos, &href_text);
if (!strcasecmp(directive, "default")) { /* default */
mapdflt = imap_url(r, NULL, value);
if (!mapdflt) {
goto menu_bail;
}
if (showmenu) { /* print the default if there's a menu */
redirect = imap_url(r, base, mapdflt);
if (!redirect) {
goto menu_bail;
}
menu_default(r, imap_menu, redirect,
href_text ? href_text : mapdflt);
}
continue;
}
vertex = 0;
while (vertex < MAXVERTS &&
sscanf(string_pos, "%lf%*[, ]%lf",
&pointarray[vertex][X], &pointarray[vertex][Y]) == 2) {
/* Now skip what we just read... we can't use ANSIism %n */
while (apr_isspace(*string_pos)) { /* past whitespace */
string_pos++;
}
while (apr_isdigit(*string_pos)) { /* and the 1st number */
string_pos++;
}
string_pos++; /* skip the ',' */
while (apr_isspace(*string_pos)) { /* past any more whitespace */
string_pos++;
}
while (apr_isdigit(*string_pos)) { /* 2nd number */
string_pos++;
}
vertex++;
} /* so long as there are more vertices to
read, and we have room, read them in.
We start where we left off of the last
sscanf, not at the beginning. */
pointarray[vertex][X] = -1; /* signals the end of vertices */
if (showmenu) {
if (!href_text) {
read_quoted(&string_pos, &href_text); /* href text could
be here instead */
}
redirect = imap_url(r, base, value);
if (!redirect) {
goto menu_bail;
}
menu_directive(r, imap_menu, redirect,
href_text ? href_text : value);
continue;
}
/* note that we don't make it past here if we are making a menu */
if (testpoint[X] == -1 || pointarray[0][X] == -1) {
continue; /* don't try the following tests if testpoints
are invalid, or if there are no
coordinates */
}
if (!strcasecmp(directive, "poly")) { /* poly */
if (pointinpoly(testpoint, pointarray)) {
ap_cfg_closefile(imap);
redirect = imap_url(r, base, value);
if (!redirect) {
return HTTP_INTERNAL_SERVER_ERROR;
}
return (imap_reply(r, redirect));
}
continue;
}
if (!strcasecmp(directive, "circle")) { /* circle */
if (pointincircle(testpoint, pointarray)) {
ap_cfg_closefile(imap);
redirect = imap_url(r, base, value);
if (!redirect) {
return HTTP_INTERNAL_SERVER_ERROR;
}
return (imap_reply(r, redirect));
}
continue;
}
if (!strcasecmp(directive, "rect")) { /* rect */
if (pointinrect(testpoint, pointarray)) {
ap_cfg_closefile(imap);
redirect = imap_url(r, base, value);
if (!redirect) {
return HTTP_INTERNAL_SERVER_ERROR;
}
return (imap_reply(r, redirect));
}
continue;
}
if (!strcasecmp(directive, "point")) { /* point */
if (is_closer(testpoint, pointarray, &closest_yet)) {
closest = apr_pstrdup(r->pool, value);
}
continue;
} /* move on to next line whether it's
closest or not */
} /* nothing matched, so we get another line! */
ap_cfg_closefile(imap); /* we are done with the map file; close it */
if (showmenu) {
menu_footer(r); /* finish the menu and we are done */
return OK;
}
if (closest) { /* if a 'point' directive has been seen */
redirect = imap_url(r, base, closest);
if (!redirect) {
return HTTP_INTERNAL_SERVER_ERROR;
}
return (imap_reply(r, redirect));
}
if (mapdflt) { /* a default should be defined, even if
only 'nocontent' */
redirect = imap_url(r, base, mapdflt);
if (!redirect) {
return HTTP_INTERNAL_SERVER_ERROR;
}
return (imap_reply(r, redirect));
}
return HTTP_INTERNAL_SERVER_ERROR; /* If we make it this far,
we failed. They lose! */
need_2_fields:
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00679)
"map file %s, line %d syntax error: requires at "
"least two fields", r->uri, imap->line_number);
/* fall through */
menu_bail:
ap_cfg_closefile(imap);
if (showmenu) {
/* There's not much else we can do ... we've already sent the headers
* to the client.
*/
ap_rputs("\n\n[an internal server error occured]\n", r);
menu_footer(r);
return OK;
}
return HTTP_INTERNAL_SERVER_ERROR;
}
static int imap_handler(request_rec *r)
{
/* Optimization: skip the allocation of large local variables on the
* stack (in imap_handler_internal()) on requests that aren't using
* imagemaps
*/
if (r->method_number != M_GET || (strcmp(r->handler,IMAP_MAGIC_TYPE)
&& strcmp(r->handler, "imap-file"))) {
return DECLINED;
}
else {
return imap_handler_internal(r);
}
}
static void register_hooks(apr_pool_t *p)
{
ap_hook_handler(imap_handler,NULL,NULL,APR_HOOK_MIDDLE);
}
AP_DECLARE_MODULE(imagemap) =
{
STANDARD20_MODULE_STUFF,
create_imap_dir_config, /* dir config creater */
merge_imap_dir_configs, /* dir merger --- default is to override */
NULL, /* server config */
NULL, /* merge server config */
imap_cmds, /* command apr_table_t */
register_hooks /* register hooks */
};