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<?php
function getid(): string {
return str_pad(bin2hex(random_bytes(16)), 32, "0", STR_PAD_LEFT);
}
function delTree($dir) {
foreach (scandir($dir) as $ent) {
if ($ent === "." || $ent === "..")
continue;
$path = $dir . DIRECTORY_SEPARATOR . $ent;
if (is_dir($path))
delTree($path);
else
unlink($path);
}
return rmdir($dir);
}
$defaultCode = <<<java
public class Program {
public static void main(String[] args) {
// Your code here
System.out.println("Hello, world!");
}
}
java;
$code = null;
$result = null;
if (isset($_POST["code"]) && strlen($_POST["code"]) <= 16383) {
$id = getid();
$code = $_POST["code"];
$srcDir = __DIR__ . "/../_runners/$id/src";
mkdir($srcDir, recursive: true);
file_put_contents($srcDir . "/Program.java", $code);
chdir(__DIR__ . "/..");
$resultStr = shell_exec("./compile-and-run.sh '$id' Program 2>/dev/null");
chdir(__DIR__);
if (is_string($resultStr)) {
$result = json_decode($resultStr, true);
}
header("Content-Type: application/json");
echo json_encode($result);
exit;
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=916, initial-scale=1.0">
<title>Java</title>
<link rel="stylesheet" href="codemirror.css">
<link rel="stylesheet" href="eclipse.css">
<link rel="stylesheet" href="site.css">
<script src="jquery-1.12.4.min.js"></script>
<script src="codemirror.js"></script>
<script src="clike.js"></script>
</head>
<body>
<div id="loader" style="display: none;">
<div id="spinner"></div>
</div>
<h1>☕️ Java Compiler</h1>
<p>Powered by Eclipse Temurin</p>
<form method="POST">
<textarea maxlength="16383" id="editor" name="code" rows="20"><?= htmlentities($code ?? $defaultCode) ?></textarea>
<br>
<button type="submit">▶ Compile & run</button>
</form>
<div id="output" style="display: none;">
</div>
<script>
$(function() {
var editor = CodeMirror.fromTextArea($("#editor")[0], {
lineNumbers: true,
mode: "text/x-java",
theme: "eclipse",
tabSize: 4,
indentWithTabs: false,
smartIndent: true,
indentUnit: 4
});
editor.setSize(900, 500);
$("form").on("submit", function(e) {
e.preventDefault();
$("#loader").show();
$("#output").empty().hide();
$.ajax({
type: "POST",
url: location.href,
data: {
code: editor.getValue()
},
dataType: "json",
success: function(data) {
$("#loader").hide();
if (data.compile.status == 0) {
if (data.run.status != null) {
// program was executed
$("#output").append(
$("<h4></h4>").text(data.run.status == 0 ? "Executed successfully" : "Execution failed").css("color", data.run.status == 0 ? "green" : "red"),
);
if (data.run.stdout) {
$("#output").append(
$("<p></p>").text("Program output:"),
$("<pre></pre>").append(
$("<code></code>").text(data.run.stdout)
)
);
}
if (data.run.stderr) {
$("#output").append(
$("<p></p>").text("Error output:"),
$("<pre></pre>").append(
$("<code></code>").text(data.run.stderr)
)
);
}
}
} else {
// compilation failed, stderr will contain compiler errors
$("#output").append(
$("<h4></h4>").text("Compilation failed").css("color", "red"),
$("<p></p>").text("Compiler errors:"),
$("<pre></pre>").append(
$("<code></code>").text(data.compile.stderr)
)
);
}
$("#output").slideDown(400);
}
})
});
});
</script>
</body>
</html>
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