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/* Copyright 2012, Sebastian Reichel <sre@ring0.de>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
public errordomain WebSessionError {
SESSION_NOT_FOUND,
USER_NOT_FOUND
}
public class WebSession {
public int user {
get;
private set;
default = 0;
}
public string name {
get;
private set;
default = "Guest";
}
public bool failed {
get;
private set;
default = false;
}
public bool logged_in {
get;
private set;
default = false;
}
public bool superuser {
get;
private set;
default = false;
}
public bool disabled {
get;
private set;
default = false;
}
private string generate_session_id(int user) {
const string charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
string result = "";
Random.set_seed((uint32) time_t() + (uint32) Posix.getpid() + (uint32) user);
for(int i=0; i<19; i++) {
int character_position = Random.int_range(0,charset.length);
string character = charset[character_position].to_string();
result += character;
}
/* TODO: make sure, that session id is unique */
return result;
}
private void setup_auth(int user) {
var auth = db.get_user_auth(user);
this.disabled = auth.disabled;
this.superuser = auth.superuser;
this.logged_in = true;
}
public void logout() {
if(logged_in) {
db.set_sessionid(user, "");
superuser = false;
logged_in = false;
}
}
public WebSession(Soup.Server server, Soup.Message msg, string path, GLib.HashTable<string,string>? query, Soup.ClientContext client) {
var cookies = Soup.cookies_from_request(msg);
/* Check for existing session */
foreach(var cookie in cookies) {
if(cookie.name == "session") {
var sessionid = cookie.value;
try {
user = db.get_user_by_sessionid(sessionid);
name = db.get_username(user);
setup_auth(user);
return;
} catch(WebSessionError e) {
/* invalid session, ignore */
}
}
}
/* check for login query */
if(query == null || !query.contains("user") || !query.contains("password"))
return;
/* get credentials */
var userid = int.parse(query["user"]);
var password = query["password"];
/* check credentials */
if(db.check_user_password(userid, password)) {
/* generate session */
var sessionid = generate_session_id(userid);
/* set session in database */
db.set_sessionid(userid, sessionid);
/* set session in reply cookie */
cookies = new SList<Soup.Cookie>();
var sessioncookie = new Soup.Cookie("session", sessionid, "", "/", -1);
sessioncookie.domain = null;
cookies.append(sessioncookie);
Soup.cookies_to_response(cookies, msg);
/* login successful */
user = userid;
try {
name = db.get_username(user);
} catch(WebSessionError e) {
name = "Unknown User";
}
setup_auth(user);
} else {
/* login failed */
failed=true;
}
}
}
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