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/*
* Copyright (C) 2007 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#define _GNU_SOURCE
#include "session.h"
#include <string.h>
#include <fcgiapp.h>
#include <stdio.h>
#include <collections/linked_list.h>
#define COOKIE_LEN 16
typedef struct private_session_t private_session_t;
/**
* private data of the task manager
*/
struct private_session_t {
/**
* public functions
*/
session_t public;
/**
* session ID
*/
char sid[COOKIE_LEN * 2 + 1];
/**
* have we sent the session cookie?
*/
bool cookie_sent;
/**
* list of controller instances controller_t
*/
linked_list_t *controllers;
/**
* list of filter instances filter_t
*/
linked_list_t *filters;
/**
* user defined session context
*/
context_t *context;
};
METHOD(session_t, add_controller, void,
private_session_t *this, controller_t *controller)
{
this->controllers->insert_last(this->controllers, controller);
}
METHOD(session_t, add_filter, void,
private_session_t *this, filter_t *filter)
{
this->filters->insert_last(this->filters, filter);
}
/**
* Create a session ID and a cookie
*/
static bool create_sid(private_session_t *this)
{
char buf[COOKIE_LEN];
rng_t *rng;
rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
if (!rng)
{
return FALSE;
}
if (!rng->get_bytes(rng, sizeof(buf), buf))
{
rng->destroy(rng);
return FALSE;
}
rng->destroy(rng);
chunk_to_hex(chunk_create(buf, sizeof(buf)), this->sid, FALSE);
return TRUE;
}
/**
* run all registered filters
*/
static bool run_filter(private_session_t *this, request_t *request, char *p0,
char *p1, char *p2, char *p3, char *p4, char *p5)
{
enumerator_t *enumerator;
filter_t *filter;
enumerator = this->filters->create_enumerator(this->filters);
while (enumerator->enumerate(enumerator, &filter))
{
if (!filter->run(filter, request, p0, p1, p2, p3, p4, p5))
{
enumerator->destroy(enumerator);
return FALSE;
}
}
enumerator->destroy(enumerator);
return TRUE;
}
METHOD(session_t, process, void,
private_session_t *this, request_t *request)
{
char *pos, *start, *param[6] = {NULL, NULL, NULL, NULL, NULL, NULL};
enumerator_t *enumerator;
bool handled = FALSE;
controller_t *current;
int i = 0;
if (!this->cookie_sent)
{
request->add_cookie(request, "SID", this->sid);
this->cookie_sent = TRUE;
}
start = request->get_path(request);
if (start)
{
if (*start == '/')
{
start++;
}
while ((pos = strchr(start, '/')) != NULL && i < 5)
{
param[i++] = strndupa(start, pos - start);
start = pos + 1;
}
param[i] = strdupa(start);
if (run_filter(this, request, param[0], param[1], param[2], param[3],
param[4], param[5]))
{
enumerator = this->controllers->create_enumerator(this->controllers);
while (enumerator->enumerate(enumerator, ¤t))
{
if (streq(current->get_name(current), param[0]))
{
current->handle(current, request, param[1], param[2],
param[3], param[4], param[5]);
handled = TRUE;
break;
}
}
enumerator->destroy(enumerator);
}
else
{
handled = TRUE;
}
}
if (!handled)
{
if (this->controllers->get_first(this->controllers,
(void**)¤t) == SUCCESS)
{
request->streamf(request,
"Status: 301 Moved permanently\nLocation: %s/%s\n\n",
request->get_base(request), current->get_name(current));
}
}
}
METHOD(session_t, get_sid, char*,
private_session_t *this)
{
return this->sid;
}
METHOD(session_t, destroy, void,
private_session_t *this)
{
this->controllers->destroy_offset(this->controllers, offsetof(controller_t, destroy));
this->filters->destroy_offset(this->filters, offsetof(filter_t, destroy));
DESTROY_IF(this->context);
free(this);
}
/*
* see header file
*/
session_t *session_create(context_t *context)
{
private_session_t *this;
INIT(this,
.public = {
.add_controller = _add_controller,
.add_filter = _add_filter,
.process = _process,
.get_sid = _get_sid,
.destroy = _destroy,
},
.controllers = linked_list_create(),
.filters = linked_list_create(),
.context = context,
);
if (!create_sid(this))
{
destroy(this);
return NULL;
}
return &this->public;
}
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