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export const runtime = 'nodejs';
export const dynamic = 'force-dynamic';
/**
* Simple streaming proxy for media manifests and segments.
* Accepts absolute http(s) URL via ?url= and streams it with permissive CORS.
*
* IMPORTANT: This API route requires a Node.js server runtime to proxy requests.
* The 'force-dynamic' export above ensures this route runs at runtime.
*/
export async function OPTIONS(): Promise<Response> {
return new Response(null, {
status: 204,
headers: {
'access-control-allow-origin': '*',
'access-control-allow-methods': 'GET, HEAD, OPTIONS',
'access-control-allow-headers': 'Range, Accept, Origin, Referer, User-Agent',
'access-control-max-age': '86400'}});
}
function passthrough(resp: Response): Headers {
const out = new Headers();
const copy = (n: string) => {
const v = resp.headers.get(n);
if (v) out.set(n, v);
};
// Common content headers
copy('content-type');
copy('content-length');
copy('content-range');
copy('accept-ranges');
copy('content-encoding');
copy('cache-control');
copy('etag');
copy('last-modified');
// CORS
out.set('access-control-allow-origin', '*');
out.set('access-control-allow-methods', 'GET, HEAD, OPTIONS');
out.set('access-control-allow-headers', 'Range, Accept, Origin, Referer, User-Agent');
out.set('access-control-expose-headers', 'Content-Type, Content-Length, Accept-Ranges, Content-Range, ETag, Cache-Control, Last-Modified');
return out;
}
function buildHeaderParams(searchParams: URLSearchParams): URLSearchParams {
const out = new URLSearchParams();
const origin = searchParams.get('origin');
const userAgent = searchParams.get('user_agent');
const referer = searchParams.get('referer');
const customHeaders = searchParams.get('custom_headers');
if (origin) out.set('origin', origin);
if (userAgent) out.set('user_agent', userAgent);
if (referer) out.set('referer', referer);
if (customHeaders) out.set('custom_headers', customHeaders);
return out;
}
function appendHeaderParams(target: URLSearchParams, headers: URLSearchParams): void {
for (const [key, value] of headers.entries()) {
target.set(key, value);
}
}
function buildUpstreamHeaders(req: Request, searchParams: URLSearchParams): Headers {
const h = new Headers();
const copy = (n: string) => {
const v = req.headers.get(n);
if (v) h.set(n, v);
};
copy('range');
copy('accept');
copy('accept-language');
// Priority: query params > request headers (allows channel-specific overrides)
const originParam = searchParams.get('origin');
const userAgentParam = searchParams.get('user_agent');
const refererParam = searchParams.get('referer');
const customHeadersParam = searchParams.get('custom_headers');
// Apply Origin (query param or fallback to request header)
if (originParam) {
h.set('origin', originParam);
} else {
copy('origin');
}
// Apply User-Agent (query param or fallback to request header)
if (userAgentParam) {
h.set('user-agent', userAgentParam);
} else {
copy('user-agent');
}
// Apply Referer (query param or fallback to request header)
if (refererParam) {
h.set('referer', refererParam);
} else {
copy('referer');
}
// Apply custom headers from JSON string
if (customHeadersParam) {
try {
const custom = JSON.parse(customHeadersParam);
if (typeof custom === 'object' && custom !== null) {
for (const [key, value] of Object.entries(custom)) {
if (typeof value === 'string') {
h.set(key, value);
}
}
}
} catch {
// Invalid JSON, ignore
}
}
// Avoid stale caches for live streams
h.set('cache-control', 'no-cache');
return h;
}
function invalidResponse(message: string, status = 400): Response {
return new Response(JSON.stringify({ error: message }), {
status,
headers: { 'content-type': 'application/json', 'access-control-allow-origin': '*' }});
}
export async function HEAD(req: Request): Promise<Response> {
const searchParams = new URL(req.url).searchParams;
const urlParam = searchParams.get('url') || '';
if (requireAuthEnabled() && !hasAuth(req)) return invalidResponse('Unauthorized', 401);
const validated = validateUpstreamUrl(urlParam);
if (!validated.ok) return invalidResponse(validated.error, validated.status);
try {
const upstream = await fetch(validated.url, {
method: 'HEAD',
headers: buildUpstreamHeaders(req, searchParams),
redirect: 'follow'});
return new Response(null, {
status: upstream.status,
statusText: upstream.statusText,
headers: passthrough(upstream)});
} catch (e: any) {
return invalidResponse(e?.message || 'Proxy HEAD failed', 502);
}
}
export async function GET(req: Request): Promise<Response> {
const searchParams = new URL(req.url).searchParams;
const urlParam = searchParams.get('url') || '';
if (requireAuthEnabled() && !hasAuth(req)) return invalidResponse('Unauthorized', 401);
const validated = validateUpstreamUrl(urlParam);
if (!validated.ok) return invalidResponse(validated.error, validated.status);
try {
const upstream = await fetch(validated.url, {
method: 'GET',
headers: buildUpstreamHeaders(req, searchParams),
redirect: 'follow'});
const contentType = upstream.headers.get('content-type') || '';
const isHls = contentType.includes('application/vnd.apple.mpegurl') ||
contentType.includes('application/x-mpegurl') ||
contentType.includes('audio/mpegurl');
if (isHls && upstream.ok) {
const text = await upstream.text();
const baseUrl = new URL(validated.url);
const headerParams = buildHeaderParams(searchParams);
const shouldProxyAll = headerParams.toString().length > 0;
// Basic rewrite: find lines that are URLs (not starting with #)
// and wrap them in the proxy
const rewritten = text.split('\n').map(line => {
const trimmed = line.trim();
if (!trimmed || trimmed.startsWith('#')) return line;
try {
// Resolve relative URLs against the manifest URL
const absolute = new URL(trimmed, baseUrl).toString();
// Hybrid Proxy: Only proxy nested playlists
// This saves bandwidth by letting the browser fetch segments directly
const isPlaylist = absolute.includes('.m3u8') || absolute.includes('.m3u');
if (isPlaylist || shouldProxyAll) {
const params = new URLSearchParams();
params.set('url', absolute);
appendHeaderParams(params, headerParams);
return `/api/proxy/stream?${params.toString()}`;
} else {
// Return absolute direct URL for segments
return absolute;
}
} catch {
return line;
}
}).join('\n');
const headers = passthrough(upstream);
headers.delete('content-length'); // Body size changed
headers.set('content-length', String(new TextEncoder().encode(rewritten).length));
return new Response(rewritten, {
status: upstream.status,
statusText: upstream.statusText,
headers});
}
return new Response(upstream.body, {
status: upstream.status,
statusText: upstream.statusText,
headers: passthrough(upstream)});
} catch (e: any) {
return invalidResponse(e?.message || 'Proxy GET failed', 502);
}
}
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