merged the modularization branch (credentials) back to trunk

src/libfast/session.c

@@ -0,0 +1,211 @@
+/*
+ * 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.
+ *
+ * $Id$
+ */
+
+#define _GNU_SOURCE
+
+#include "session.h"
+
+#include <string.h>
+#include <fcgiapp.h>
+#include <stdio.h>
+
+#include <utils/linked_list.h>
+#include <utils/randomizer.h>
+
+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;
+	
+	/**
+	 * 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;
+};
+
+/**
+ * Implementation of session_t.add_controller.
+ */
+static void add_controller(private_session_t *this, controller_t *controller)
+{
+	this->controllers->insert_last(this->controllers, controller);
+}
+
+/**
+ * Implementation of session_t.add_filter.
+ */
+static void add_filter(private_session_t *this, filter_t *filter)
+{
+	this->filters->insert_last(this->filters, filter);
+}
+
+/**
+ * Create a session ID and a cookie
+ */
+static void create_sid(private_session_t *this, request_t *request)
+{
+	char buf[16];
+	chunk_t chunk = chunk_from_buf(buf);
+	randomizer_t *randomizer = randomizer_create();
+	
+	randomizer->get_pseudo_random_bytes(randomizer, sizeof(buf), buf);
+	this->sid = chunk_to_hex(chunk, FALSE);
+	request->add_cookie(request, "SID", this->sid);
+	randomizer->destroy(randomizer);
+}
+
+/**
+ * run all registered filters
+ */
+static bool run_filter(private_session_t *this, request_t *request,
+					   controller_t *controller)
+{
+	iterator_t *iterator;
+	filter_t *filter;
+	
+	iterator = this->filters->create_iterator(this->filters, TRUE);
+	while (iterator->iterate(iterator, (void**)&filter))
+	{
+		if (!filter->run(filter, request, controller))
+		{
+			iterator->destroy(iterator);
+			return FALSE;
+		}
+	}
+	iterator->destroy(iterator);
+	return TRUE;
+}
+
+/**
+ * Implementation of session_t.process.
+ */
+static void process(private_session_t *this, request_t *request)
+{
+	char *pos, *start, *param[6] = {NULL, NULL, NULL, NULL, NULL, NULL};
+	iterator_t *iterator;
+	bool handled = FALSE;
+	controller_t *current;
+	int i = 0;
+	
+	if (this->sid == NULL)
+	{
+		create_sid(this, request);
+	}
+	
+	start = request->get_path(request);
+	if (start)
+	{
+		if (*start == '/') start++;
+		while ((pos = strchr(start, '/')) != NULL && i < 5)
+		{
+			param[i++] = strndup(start, pos - start);
+			start = pos + 1;
+		}
+		param[i] = strdup(start);
+		iterator = this->controllers->create_iterator(this->controllers, TRUE);
+		while (iterator->iterate(iterator, (void**)&current))
+		{
+			if (streq(current->get_name(current), param[0]))
+			{	
+				if (run_filter(this, request, current))
+				{
+					current->handle(current, request, param[1], param[2],
+									param[3], param[4], param[5]);
+					handled = TRUE;
+				}
+				break;
+			}
+		}
+		iterator->destroy(iterator);
+		for (i = 0; i < 6; i++)
+		{
+			free(param[i]);
+		}
+	}
+	if (!handled)
+	{
+		if (this->controllers->get_first(this->controllers,
+										 (void**)&current) == SUCCESS)
+		{
+			request->redirect(request, current->get_name(current));
+		}
+	}
+}
+
+/**
+ * Implementation of session_t.get_sid.
+ */
+static char* get_sid(private_session_t *this)
+{
+	return this->sid;
+}
+
+/**
+ * Implementation of session_t.destroy
+ */
+static void destroy(private_session_t *this)
+{
+	this->controllers->destroy_offset(this->controllers, offsetof(controller_t, destroy));
+	this->filters->destroy_offset(this->filters, offsetof(filter_t, destroy));
+	if (this->context) this->context->destroy(this->context);
+	free(this->sid);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+session_t *session_create(context_t *context)
+{
+	private_session_t *this = malloc_thing(private_session_t);
+
+	this->public.add_controller = (void(*)(session_t*, controller_t*))add_controller;
+	this->public.add_filter = (void(*)(session_t*, filter_t*))add_filter;
+	this->public.process = (void(*)(session_t*,request_t*))process;
+	this->public.get_sid = (char*(*)(session_t*))get_sid;
+	this->public.destroy = (void(*)(session_t*))destroy;
+
+	this->sid = NULL;
+	this->controllers = linked_list_create();
+	this->filters = linked_list_create();
+	this->context = context;
+	
+	return &this->public;
+}
+