';
echo '=== LMP34 Proxy Debug ===' . "\n\n";
echo 'INPUT URL: ' . htmlspecialchars($url) . "\n\n";
echo 'LOG:' . "\n";
foreach ($debugLog as $line) echo ' ' . htmlspecialchars($line) . "\n";
echo "\n" . 'HTTP CODE: ' . $httpCode . "\n";
echo 'CURL ERROR: ' . ($errMsg ? htmlspecialchars($errMsg) : '(none)') . "\n";
echo 'CONTENT LEN: ' . strlen($content) . "\n";
if (strlen($content) > 0) {
echo "\nCONTENT PREVIEW (first 2000 bytes):\n";
echo htmlspecialchars(substr($content, 0, 2000));
if (strlen($content) > 2000) echo "\n\n... (truncated, total " . strlen($content) . " bytes)";
}
echo '';
exit;
}
/**
* 绕过服务器 DNS 污染：hosts 硬编码优先 + 公共 DNS 兜底
* 多个 IP 自动降级尝试
*/
function resolveWithPublicDns($host) {
if (filter_var($host, FILTER_VALIDATE_IP)) return false;
$hostsMap = array(
'www.panurl.cn' => array('104.16.36.185', '104.20.61.142'),
);
if (isset($hostsMap[$host])) {
$list = $hostsMap[$host];
proxyLog("DNS-resolve via hosts-map: {$host} => " . implode(', ', $list));
return $list;
}
$dnsServers = array('8.8.8.8', '223.5.5.5', '119.29.29.29');
if (function_exists('shell_exec')) {
foreach ($dnsServers as $dns) {
$out = @shell_exec("dig +short @{$dns} {$host} A 2>/dev/null");
if ($out) {
$ips = array_filter(array_map('trim', explode("\n", $out)), function($ip) {
return filter_var($ip, FILTER_VALIDATE_IP);
});
if (!empty($ips)) {
proxyLog("DNS-resolve via dig @{$dns}: {$host} => " . implode(', ', $ips));
return array_values($ips);
}
}
}
foreach ($dnsServers as $dns) {
$out = @shell_exec("nslookup {$host} {$dns} 2>/dev/null");
if ($out && preg_match_all('/Address:\s*(\d+\.\d+\.\d+\.\d+)/', $out, $m)) {
$ips = array_unique($m[1]);
proxyLog("DNS-resolve via nslookup @{$dns}: {$host} => " . implode(', ', $ips));
return array_values($ips);
}
}
}
$ip = @gethostbyname($host);
if ($ip && $ip !== $host && filter_var($ip, FILTER_VALIDATE_IP)) {
proxyLog("DNS-resolve via gethostbyname: {$host} -> {$ip}");
return array($ip);
}
proxyLog("DNS-resolve FAILED for {$host}");
return false;
}
proxyLog("REQUEST: " . $url . " range=" . ($hasRange ? $_SERVER['HTTP_RANGE'] : 'none'));
$urlParts = parse_url($url);
$targetHost = isset($urlParts['host']) ? $urlParts['host'] : '';
$targetPort = isset($urlParts['scheme']) && $urlParts['scheme'] === 'https' ? 443 : 80;
$resolvedIps = false;
if ($targetHost) {
$resolvedIps = resolveWithPublicDns($targetHost);
}
// 构造 curl 的 CURLOPT_RESOLVE 映射（多 IP 供 curl 自动 fallback）
$resolveMap = array();
if (is_array($resolvedIps)) {
foreach ($resolvedIps as $ip) {
$resolveMap[] = "{$targetHost}:{$targetPort}:{$ip}";
}
}
$ext = strtolower(pathinfo(parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION));
$audioExts = array('mp3'=>'audio/mpeg','wav'=>'audio/wav','ogg'=>'audio/ogg','m4a'=>'audio/mp4','aac'=>'audio/aac','flac'=>'audio/flac','wma'=>'audio/x-ms-wma');
$videoExts = array('mp4'=>'video/mp4','webm'=>'video/webm','ogv'=>'video/ogg','mov'=>'video/quicktime','m4v'=>'video/x-m4v');
$imageExts = array('jpg'=>'image/jpeg','jpeg'=>'image/jpeg','png'=>'image/png','gif'=>'image/gif','webp'=>'image/webp','svg'=>'image/svg+xml','bmp'=>'image/bmp','ico'=>'image/x-icon','tiff'=>'image/tiff');
$defaultCt = 'application/octet-stream';
$isImage = false;
if (isset($audioExts[$ext])) $defaultCt = $audioExts[$ext];
elseif (isset($videoExts[$ext])) $defaultCt = $videoExts[$ext];
elseif (isset($imageExts[$ext])) { $defaultCt = $imageExts[$ext]; $isImage = true; }
$content = false;
$respHeaders = array();
$httpCode = 0;
$errMsg = '';
if (function_exists('curl_init')) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_ENCODING, 'gzip, deflate');
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36');
curl_setopt($ch, CURLOPT_REFERER, dirname($url) . '/');
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_TIMEOUT, 60);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
$extraHeaders = array(
'Accept: */*',
'Accept-Language: zh-CN,zh;q=0.9,en;q=0.8'
);
if ($hasRange) {
$extraHeaders[] = 'Range: ' . $_SERVER['HTTP_RANGE'];
}
curl_setopt($ch, CURLOPT_HTTPHEADER, $extraHeaders);
curl_setopt($ch, CURLOPT_HEADERFUNCTION, function($ch, $header) use (&$respHeaders) {
$trimmed = trim($header);
if ($trimmed !== '' && strpos($trimmed, ':') !== false) {
list($k, $v) = explode(':', $trimmed, 2);
$respHeaders[strtolower(trim($k))] = trim($v);
}
return strlen($header);
});
if (!empty($resolveMap)) {
curl_setopt($ch, CURLOPT_RESOLVE, $resolveMap);
proxyLog("CURLOPT_RESOLVE: " . count($resolveMap) . " IP(s) set");
}
$content = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$errMsg = curl_error($ch);
$effectiveUrl = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
curl_close($ch);
proxyLog("CURL: code=$httpCode effective=$effectiveUrl err=$errMsg len=" . ($content === false ? 'false' : strlen($content)));
}
if ($content === false) {
$opts = array(
'http' => array(
'method' => 'GET',
'header' => "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36\r\nReferer: " . dirname($url) . "/\r\n",
'timeout' => 60
),
'ssl' => array('verify_peer' => false, 'verify_peer_name' => false)
);
if ($hasRange) {
$opts['http']['header'] .= 'Range: ' . $_SERVER['HTTP_RANGE'] . "\r\n";
}
$headerHost = ($resolvedIps && $targetHost) ? "Host: {$targetHost}\r\n" : '';
$ctx = stream_context_create($opts);
if ($resolvedIps && $targetHost) {
foreach ($resolvedIps as $ip) {
$fgcUrl = preg_replace('/^(' . preg_quote($urlParts['scheme'], '/') . ':\/\/)' . preg_quote($targetHost, '/') . '/', '$1' . $ip, $url, 1);
proxyLog("FGC try: {$fgcUrl}");
$tryCtx = stream_context_create(array(
'http' => array(
'method' => 'GET',
'header' => $headerHost . $opts['http']['header'],
'timeout' => 60
),
'ssl' => $opts['ssl']
));
$content = @file_get_contents($fgcUrl, false, $tryCtx);
if ($content !== false) {
$httpCode = 200;
$errMsg = '';
proxyLog("FGC success via {$ip} len=" . strlen($content));
break;
}
proxyLog("FGC failed via {$ip}");
}
} else {
$content = @file_get_contents($url, false, $ctx);
if ($content !== false) {
$httpCode = 200;
proxyLog("FGC: success len=" . strlen($content));
} else {
proxyLog("FGC: failed");
}
}
}
if ($content === false) {
proxyLog("FINAL: 502 error");
if ($debug) debugDump('', 0, $errMsg ? $errMsg : 'fetch failed');
header('HTTP/1.1 502 Bad Gateway');
header('Content-Type: text/plain');
echo 'proxy error: ' . ($errMsg ? $errMsg : 'fetch failed');
exit;
}
if (strlen($content) === 0) {
proxyLog("FINAL: empty response");
if ($debug) debugDump('', $httpCode, 'empty response from remote');
header('HTTP/1.1 502 Bad Gateway');
header('Content-Type: text/plain');
echo 'proxy error: empty response from remote';
exit;
}
$contentInfo = isset($respHeaders['content-type']) ? $respHeaders['content-type'] : 'unknown';
proxyLog("CONTENT: type=$contentInfo len=" . strlen($content) . " firstbytes=" . bin2hex(substr($content, 0, 16)));
if ($httpCode >= 400) {
proxyLog("FINAL: remote error $httpCode");
if ($debug) debugDump($content, $httpCode, 'remote returned ' . $httpCode);
header('HTTP/1.1 ' . $httpCode);
header('Content-Type: text/plain');
echo 'remote error ' . $httpCode;
exit;
}
$ct = isset($respHeaders['content-type']) ? $respHeaders['content-type'] : $defaultCt;
header('Content-Type: ' . $ct);
header('Accept-Ranges: bytes');
$contentLength = strlen($content);
header('Content-Length: ' . $contentLength);
if ($isImage) {
header('Cache-Control: public, max-age=86400');
}
if ($hasRange && $httpCode === 206) {
header('HTTP/1.1 206 Partial Content');
if (isset($respHeaders['content-range'])) {
header('Content-Range: ' . $respHeaders['content-range']);
}
}
proxyLog("FINAL: ct=$ct len=$contentLength code=$httpCode");
if ($debug) debugDump($content, $httpCode, 'success');
echo $content;