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eval.php
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eval.php
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<?php
/*
* Codejudge
* Copyright 2012, Sankha Narayan Guria ([email protected])
* Licensed under MIT License.
*
* Compiler PHP Script
*/
require_once('functions.php');
include('dbinfo.php');
connectdb();
$query = "SELECT * FROM prefs";
$result = mysql_query($query);
$accept = mysql_fetch_array($result);
$query = "SELECT status FROM users WHERE username='".$_SESSION['username']."'";
$result = mysql_query($query);
$status = mysql_fetch_array($result);
if (!preg_match("/^[^\\/?* :;{}\\\\]+\\.[^\\/?*: ;{}\\\\]{1,4}$/", $_POST['filename']))
header("Location: solve.php?ferror=1&id=".$_POST['id']); // invalid filename
// check if the user is banned or allowed to submit and SQL Injection checks
else if($accept['accept'] == 1 and $status['status'] == 1 and is_numeric($_POST['id'])) {
$soln = mysql_real_escape_string($_POST['soln']);
$filename = mysql_real_escape_string($_POST['filename']);
$lang = mysql_real_escape_string($_POST['lang']);
//check if entries are empty
if(trim($soln) == "" or trim($filename) == "" or trim($lang) == "")
header("Location: solve.php?derror=1&id=".$_POST['id']);
else {
if($_POST['ctype']=='new')
// add to database if it is a new submission
$query = "INSERT INTO `solve` ( `problem_id` , `username`, `soln`, `filename`, `lang`) VALUES ('".$_POST['id']."', '".$_SESSION['username']."', '".$soln."', '".$filename."', '".$lang."')";
else {
// update database if it is a re-submission
$tmp = "SELECT attempts FROM solve WHERE (problem_id='".$_POST['id']."' AND username='".$_SESSION['username']."')";
$result = mysql_query($tmp);
$fields = mysql_fetch_array($result);
$query = "UPDATE solve SET lang='".$lang."', attempts='".($fields['attempts']+1)."', soln='".$soln."', filename='".$filename."' WHERE (username='".$_SESSION['username']."' AND problem_id='".$_POST['id']."')";
}
mysql_query($query);
// connect to the java compiler server to compile the file and fetch the results
$socket = fsockopen($compilerhost, $compilerport);
if($socket) {
fwrite($socket, $_POST['filename']."\n");
$query = "SELECT time, input, output FROM problems WHERE sl='".$_POST['id']."'";
$result = mysql_query($query);
$fields = mysql_fetch_array($result);
fwrite($socket, $fields['time']."\n");
$soln = str_replace("\n", '$_n_$', treat($_POST['soln']));
fwrite($socket, $soln."\n");
$input = str_replace("\n", '$_n_$', treat($fields['input']));
fwrite($socket, $input."\n");
fwrite($socket, $lang."\n");
$status = fgets($socket);
$contents = "";
while(!feof($socket))
$contents = $contents.fgets($socket);
if($status == 0) {
// oops! compile error
$query = "UPDATE solve SET status=1 WHERE (username='".$_SESSION['username']."' AND problem_id='".$_POST['id']."')";
mysql_query($query);
$_SESSION['cerror'] = trim($contents);
header("Location: solve.php?cerror=1&id=".$_POST['id']);
} else if($status == 1) {
if(trim($contents) == trim(treat($fields['output']))) {
// holla! problem solved
$query = "UPDATE solve SET status=2 WHERE (username='".$_SESSION['username']."' AND problem_id='".$_POST['id']."')";
mysql_query($query);
header("Location: index.php?success=1");
} else {
// duh! wrong output
$query = "UPDATE solve SET status=1 WHERE (username='".$_SESSION['username']."' AND problem_id='".$_POST['id']."')";
mysql_query($query);
header("Location: solve.php?oerror=1&id=".$_POST['id']);
}
} else if($status == 2) {
$query = "UPDATE solve SET status=1 WHERE (username='".$_SESSION['username']."' AND problem_id='".$_POST['id']."')";
mysql_query($query);
header("Location: solve.php?terror=1&id=".$_POST['id']);
}
} else
header("Location: solve.php?serror=1&id=".$_POST['id']); // compiler server not running
}
}
?>