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/*
##--------------------------------------------------------------------------
##
##  Copyright (c) 2001 Gerald Richter / ecos gmbh www.ecos.de
##
##  You may distribute under the terms of either the GNU General Public 
##  License or the Artistic License, as specified in the Perl README file.
## 
##  THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED 
##  WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 
##  MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
##
##  $Id: mod_aimproxy.c,v 1.1 2001/08/13 06:26:24 richter Exp $
##
##--------------------------------------------------------------------------
*/


#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_request.h"
#include "util_md5.h"



static void *aimproxySrvConfig(pool *p, char *d) ;
static const char * aimproxyCmdCacheDir(cmd_parms *cmd, void *config, char *val) ;
static const char * aimproxyCmdProxyPass(cmd_parms *cmd, void *config, char *val1, char * val2) ;
static int aimproxyHandler (request_rec *r) ;


    /* the table of commands we provide */
static const command_rec command_table[] = {
    { "AIMCacheDir",   aimproxyCmdCacheDir,   NULL, RSRC_CONF, TAKE1,
      "Gives the cache directory for Apache::ImageMagick Proxy" },
    { "AIMProxyPassTo",   aimproxyCmdProxyPass,   NULL, RSRC_CONF, TAKE2,
      "Gives the destination host for images not cached" },
};


    /* the main config structure */
module MODULE_VAR_EXPORT aimproxy_module = {
   STANDARD_MODULE_STUFF,
   NULL,                        /* module initializer                  */
   NULL,			/* create per-dir    config structures */
   NULL,			/* merge  per-dir    config structures */
   aimproxySrvConfig,		/* create per-server config structures */
   NULL,			/* merge  per-server config structures */
   command_table,               /* table of config file commands       */
   NULL,                        /* [#8] MIME-typed-dispatched handlers */
   NULL,                        /* [#1] URI to filename translation    */
   NULL,                        /* [#4] validate user id from request  */
   NULL,                        /* [#5] check if the user is ok _here_ */
   NULL,                        /* [#3] check access by host address   */
   NULL,                        /* [#6] determine MIME type            */
   aimproxyHandler,             /* [#7] pre-run fixups                 */
   NULL,                        /* [#9] log a transaction              */
   NULL,                        /* [#2] header parser                  */
   NULL,                        /* child_init                          */
   NULL,                        /* child_exit                          */
   NULL                         /* [#0] post read-request              */
};


struct aimconfig
    {
    char * cachedir ;
    array_header * pass ;
    } ;

struct aimpass
    {
    char * proxysrc ;
    int    proxysrclen ;
    char * proxyhost ;
    } ;

typedef struct aimconfig aimconfig ;
typedef struct aimpass aimpass ;


static int aimproxyHandler (request_rec *r)
    {
    char * args ;
    char * path_info ;
    char * file ;
    char * uri ;
    char * md5 ;
    char * ext ;
    char * cachefn  ;
    char * cachedir  ;
    char * cachepath  ;
    aimconfig * c ;
    struct stat finfo ;
    int i, len;
    int n ;
    aimpass *ent ;
    int found = 0 ;
    char * proxyhost ;

    if (r->proxyreq != NOT_PROXY) 
	{ /* someone has already set up the proxy */
	return DECLINED ;
	}

    c = (aimconfig *) ap_get_module_config(r->server->module_config, &aimproxy_module);
    
    ent = (aimpass *) c->pass->elts;
    uri  = r -> uri ;
    n    = c -> pass -> nelts ;
    for (i = 0; i < n; i++) 
	{