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| <?php
session_start();
error_reporting(0);
$allowed_extensions = ['zip', 'bz2', 'gz', 'xz', '7z'];
$allowed_mime_types = [
'application/zip',
'application/x-bzip2',
'application/gzip',
'application/x-gzip',
'application/x-xz',
'application/x-7z-compressed',
];
$BLOCK_LIST = [
"__HALT_COMPILER()",
"PK",
"<?",
"<?php",
"phar://",
"php",
"?>"
];
function content_filter($tmpfile, $block_list) {
$fh = fopen($tmpfile, "rb");
if (!$fh) return true;
$head = fread($fh, 4096);
fseek($fh, -4096, SEEK_END);
$tail = fread($fh, 4096);
fclose($fh);
$sample = $head . $tail;
$lower = strtolower($sample);
foreach ($block_list as $pat) {
if (stripos($sample, $pat) !== false) {
return false;
}
if (stripos($lower, strtolower($pat)) !== false) {
return false;
}
}
return true;
}
if (!isset($_SESSION['dir'])) {
$_SESSION['dir'] = bin2hex(random_bytes(4));
}
$salt = 'GeekChallenge_2025';
$SANDBOX = sys_get_temp_dir() . "/uploads_" . md5($salt . $_SESSION['dir']);
if (!is_dir($SANDBOX)) mkdir($SANDBOX, 0700, true);
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
if (!isset($_FILES['file'])) {
http_response_code(400);
die("No file.");
}
$tmp = $_FILES['file']['tmp_name'];
$orig = basename($_FILES['file']['name']);
if (!is_uploaded_file($tmp)) {
http_response_code(400);
die("Upload error.");
}
$ext = strtolower(pathinfo($orig, PATHINFO_EXTENSION));
if (!in_array($ext, $allowed_extensions)) {
http_response_code(400);
die("Bad extension.");
}
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime = finfo_file($finfo, $tmp);
finfo_close($finfo);
if (!in_array($mime, $allowed_mime_types)) {
http_response_code(400);
die("Bad mime.");
}
if (!content_filter($tmp, $BLOCK_LIST)) {
http_response_code(400);
die("Content blocked.");
}
$newname = time() . "_" . preg_replace('/[^A-Za-z0-9._-]/', '_', $orig);
$dest = $SANDBOX . '/' . $newname;
if (!move_uploaded_file($tmp, $dest)) {
http_response_code(500);
die("Move failed.");
}
echo "UPLOAD_OK:" . htmlspecialchars($newname, ENT_QUOTES);
exit;
}
?>
<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>文件上传 — CTF</title>
<style>
:root {
--bg:#0f1724;
--card:#0b1220;
--accent:#7c3aed;
--muted:#9aa4b2;
--glass:rgba(255,255,255,0.04);
}
body {
margin:0;
background: linear-gradient(180deg, #071029 0%, #081226 60%);
font-family: Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial;
color:#e6eef8;
display:flex;
align-items:center;
justify-content:center;
height:100vh;
}
.container {
background: var(--glass);
border:1px solid rgba(255,255,255,0.04);
border-radius:14px;
padding:26px;
max-width:500px;
width:100%;
box-shadow: 0 8px 30px rgba(2,6,23,0.7);
position:relative;
}
h1 {
margin-top:0;
font-size:22px;
margin-bottom:10px;
text-align:center;
}
p {
text-align:center;
color:var(--muted);
margin-bottom:24px;
font-size:14px;
}
.file-input {
display:flex;
flex-direction:column;
align-items:center;
gap:12px;
}
.input-box {
border:2px dashed rgba(255,255,255,0.08);
border-radius:12px;
padding:30px;
text-align:center;
cursor:pointer;
transition: all 0.3s ease;
background: rgba(255,255,255,0.02);
width:100%;
box-sizing:border-box;
}
.input-box:hover {
border-color: var(--accent);
background: rgba(124,58,237,0.04);
}
input[type=file] {
display:none;
}
.btn {
background:linear-gradient(90deg,var(--accent),#4f46e5);
border:none;
color:white;
padding:10px 18px;
border-radius:10px;
cursor:pointer;
font-weight:600;
font-size:14px;
box-shadow:0 8px 20px rgba(79,70,229,0.12);
transition:0.2s ease;
}
.btn:hover {
transform:translateY(-1px);
}
#result {
margin-top:16px;
font-size:14px;
word-break:break-all;
text-align:center;
}
#progress {
width:100%;
background:rgba(255,255,255,0.1);
border-radius:6px;
overflow:hidden;
margin-top:16px;
display:none;
}
#bar {
width:0%;
height:8px;
background:var(--accent);
transition:width 0.2s ease;
}
.logout {
position:absolute;
top:16px;
right:16px;
color:var(--muted);
font-size:13px;
text-decoration:none;
border-bottom:1px dotted var(--muted);
}
code {
background:rgba(0,0,0,0.2);
padding:2px 6px;
border-radius:4px;
font-size:13px;
}
</style>
</head>
<body>
<a href="login.php" class="logout">← 退出登录</a>
<div class="container">
<h1>上传压缩包</h1>
<p>仅允许上传 zip、bz2、gz、xz、7z 文件，系统会自动生成随机存储路径。</p>
<form id="uploadForm" enctype="multipart/form-data" method="post" class="file-input">
<label for="file" class="input-box" id="dropArea">
<strong>点击选择文件或拖拽文件至此</strong>
<div id="fileName" style="margin-top:8px;color:var(--muted)">未选择文件</div>
</label>
<input type="file" name="file" id="file" accept=".zip,.bz2,.gz,.xz,.7z" required />
<button class="btn" type="submit">上传</button>
<div id="progress"><div id="bar"></div></div>
<div id="result"></div>
</form>
</div>
<script>
const fileInput = document.getElementById('file');
const fileName = document.getElementById('fileName');
const dropArea = document.getElementById('dropArea');
const form = document.getElementById('uploadForm');
const result = document.getElementById('result');
const progress = document.getElementById('progress');
const bar = document.getElementById('bar');
fileInput.addEventListener('change', () => {
if (fileInput.files.length > 0) {
fileName.textContent = fileInput.files[0].name;
} else {
fileName.textContent = "未选择文件";
}
});
dropArea.addEventListener('dragover', e => {
e.preventDefault();
dropArea.style.borderColor = '#7c3aed';
});
dropArea.addEventListener('dragleave', e => {
e.preventDefault();
dropArea.style.borderColor = 'rgba(255,255,255,0.08)';
});
dropArea.addEventListener('drop', e => {
e.preventDefault();
dropArea.style.borderColor = 'rgba(255,255,255,0.08)';
if (e.dataTransfer.files && e.dataTransfer.files.length > 0) {
fileInput.files = e.dataTransfer.files;
fileName.textContent = fileInput.files[0].name;
}
});
form.addEventListener('submit', e => {
e.preventDefault();
const file = fileInput.files[0];
if (!file) return alert("请选择文件");
const xhr = new XMLHttpRequest();
const formData = new FormData();
formData.append("file", file);
progress.style.display = 'block';
bar.style.width = '0%';
result.textContent = '';
xhr.upload.onprogress = function (ev) {
if (ev.lengthComputable) {
const percent = Math.round((ev.loaded / ev.total) * 100);
bar.style.width = percent + '%';
}
};
xhr.onload = function () {
progress.style.display = 'none';
bar.style.width = '0%';
if (xhr.status === 200) {
const resp = xhr.responseText || '';
if (resp.startsWith("UPLOAD_OK:")) {
const fname = resp.split(":")[1];
result.innerHTML = `✅ 上传成功：<code>${fname}</code>`;
try {
fileInput.value = "";
const newInput = fileInput.cloneNode();
fileInput.parentNode.replaceChild(newInput, fileInput);
newInput.addEventListener('change', () => {
if (newInput.files.length > 0) {
fileName.textContent = newInput.files[0].name;
} else {
fileName.textContent = "未选择文件";
}
});
window.fileInput = newInput;
} catch (err) {
}
fileName.textContent = "未选择文件";
} else {
result.textContent = "❌ " + resp;
}
} else {
result.textContent = "❌ 上传失败 (" + xhr.status + ")";
}
};
xhr.onerror = function () {
progress.style.display = 'none';
bar.style.width = '0%';
result.textContent = "❌ 上传出错";
};
xhr.open("POST", "", true);
xhr.send(formData);
});
</script>
</body>
</html>
|
启动脚本运行了定时任务
