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init m3u8 proxying
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199
src/routes/m3u8-proxy.ts
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199
src/routes/m3u8-proxy.ts
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/**
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* @author Adapted from Eltik's CORS proxy
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* @description Proxies m3u8 files and their segments
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*/
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import { setResponseHeaders } from 'h3';
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// Helper function to parse URLs
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function parseURL(req_url: string, baseUrl?: string) {
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if (baseUrl) {
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return new URL(req_url, baseUrl).href;
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}
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const match = req_url.match(/^(?:(https?:)?\/\/)?(([^\/?]+?)(?::(\d{0,5})(?=[\/?]|$))?)([\/?][\S\s]*|$)/i);
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if (!match) {
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return null;
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}
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if (!match[1]) {
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if (/^https?:/i.test(req_url)) {
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return null;
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}
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// Scheme is omitted
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if (req_url.lastIndexOf("//", 0) === -1) {
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// "//" is omitted
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req_url = "//" + req_url;
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}
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req_url = (match[4] === "443" ? "https:" : "http:") + req_url;
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}
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try {
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const parsed = new URL(req_url);
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if (!parsed.hostname) {
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// "http://:1/" and "http:/notenoughslashes" could end up here
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return null;
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}
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return parsed.href;
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} catch (error) {
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return null;
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}
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}
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/**
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* Proxies m3u8 files and replaces the content to point to the proxy
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*/
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async function proxyM3U8(event: any) {
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const url = getQuery(event).url as string;
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const headersParam = getQuery(event).headers as string;
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if (!url) {
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return sendError(event, createError({
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statusCode: 400,
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statusMessage: 'URL parameter is required'
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}));
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}
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let headers = {};
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try {
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headers = headersParam ? JSON.parse(headersParam) : {};
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} catch (e) {
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return sendError(event, createError({
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statusCode: 400,
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statusMessage: 'Invalid headers format'
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}));
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}
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try {
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// Use native fetch instead of axios
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const response = await fetch(url, {
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headers: headers as HeadersInit
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});
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if (!response.ok) {
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throw new Error(`Failed to fetch M3U8: ${response.status} ${response.statusText}`);
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}
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const m3u8Content = await response.text();
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// Get the base URL for the host
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const host = getRequestHost(event);
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const proto = getRequestProtocol(event);
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const baseProxyUrl = `${proto}://${host}`;
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if (m3u8Content.includes("RESOLUTION=")) {
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// This is a master playlist with multiple quality variants
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const lines = m3u8Content.split("\n");
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const newLines: string[] = [];
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for (const line of lines) {
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if (line.startsWith("#")) {
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if (line.startsWith("#EXT-X-KEY:")) {
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// Proxy the key URL
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const regex = /https?:\/\/[^\""\s]+/g;
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const keyUrl = regex.exec(line)?.[0];
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if (keyUrl) {
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const proxyKeyUrl = `${baseProxyUrl}/ts-proxy?url=${encodeURIComponent(keyUrl)}&headers=${encodeURIComponent(JSON.stringify(headers))}`;
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newLines.push(line.replace(keyUrl, proxyKeyUrl));
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} else {
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newLines.push(line);
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}
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} else if (line.startsWith("#EXT-X-MEDIA:")) {
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// Proxy alternative media URLs (like audio streams)
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const regex = /https?:\/\/[^\""\s]+/g;
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const mediaUrl = regex.exec(line)?.[0];
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if (mediaUrl) {
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const proxyMediaUrl = `${baseProxyUrl}/m3u8-proxy?url=${encodeURIComponent(mediaUrl)}&headers=${encodeURIComponent(JSON.stringify(headers))}`;
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newLines.push(line.replace(mediaUrl, proxyMediaUrl));
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} else {
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newLines.push(line);
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}
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} else {
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newLines.push(line);
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}
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} else if (line.trim()) {
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// This is a quality variant URL
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const variantUrl = parseURL(line, url);
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if (variantUrl) {
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newLines.push(`${baseProxyUrl}/m3u8-proxy?url=${encodeURIComponent(variantUrl)}&headers=${encodeURIComponent(JSON.stringify(headers))}`);
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} else {
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newLines.push(line);
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}
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} else {
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// Empty line, preserve it
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newLines.push(line);
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}
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}
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// Set appropriate headers
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setResponseHeaders(event, {
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'Content-Type': 'application/vnd.apple.mpegurl',
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'Access-Control-Allow-Origin': '*',
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'Access-Control-Allow-Headers': '*',
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'Access-Control-Allow-Methods': '*',
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'Cache-Control': 'no-cache, no-store, must-revalidate'
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});
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return newLines.join("\n");
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} else {
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// This is a media playlist with segments
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const lines = m3u8Content.split("\n");
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const newLines: string[] = [];
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for (const line of lines) {
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if (line.startsWith("#")) {
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if (line.startsWith("#EXT-X-KEY:")) {
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// Proxy the key URL
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const regex = /https?:\/\/[^\""\s]+/g;
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const keyUrl = regex.exec(line)?.[0];
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if (keyUrl) {
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const proxyKeyUrl = `${baseProxyUrl}/ts-proxy?url=${encodeURIComponent(keyUrl)}&headers=${encodeURIComponent(JSON.stringify(headers))}`;
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newLines.push(line.replace(keyUrl, proxyKeyUrl));
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} else {
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newLines.push(line);
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}
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} else {
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newLines.push(line);
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}
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} else if (line.trim() && !line.startsWith("#")) {
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// This is a segment URL (.ts file)
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const segmentUrl = parseURL(line, url);
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if (segmentUrl) {
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newLines.push(`${baseProxyUrl}/ts-proxy?url=${encodeURIComponent(segmentUrl)}&headers=${encodeURIComponent(JSON.stringify(headers))}`);
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} else {
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newLines.push(line);
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}
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} else {
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// Comment or empty line, preserve it
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newLines.push(line);
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}
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}
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// Set appropriate headers
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setResponseHeaders(event, {
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'Content-Type': 'application/vnd.apple.mpegurl',
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'Access-Control-Allow-Origin': '*',
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'Access-Control-Allow-Headers': '*',
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'Access-Control-Allow-Methods': '*',
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'Cache-Control': 'no-cache, no-store, must-revalidate'
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});
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return newLines.join("\n");
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}
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} catch (error: any) {
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console.error('Error proxying M3U8:', error);
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return sendError(event, createError({
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statusCode: 500,
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statusMessage: error.message || 'Error proxying M3U8 file'
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}));
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}
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}
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export default defineEventHandler(async (event) => {
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// Handle CORS preflight requests
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if (isPreflightRequest(event)) return handleCors(event, {});
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return await proxyM3U8(event);
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});
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66
src/routes/ts-proxy.ts
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66
src/routes/ts-proxy.ts
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@ -0,0 +1,66 @@
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/**
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* @author Adapted from Eltik's CORS proxy
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* @description Proxies TS (transport stream) files
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*/
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import { setResponseHeaders } from 'h3';
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/**
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* Proxies TS (transport stream) files
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*/
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export default defineEventHandler(async (event) => {
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// Handle CORS preflight requests
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if (isPreflightRequest(event)) return handleCors(event, {});
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const url = getQuery(event).url as string;
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const headersParam = getQuery(event).headers as string;
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if (!url) {
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return sendError(event, createError({
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statusCode: 400,
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statusMessage: 'URL parameter is required'
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}));
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}
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let headers = {};
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try {
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headers = headersParam ? JSON.parse(headersParam) : {};
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} catch (e) {
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return sendError(event, createError({
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statusCode: 400,
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statusMessage: 'Invalid headers format'
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}));
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}
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try {
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const response = await fetch(url, {
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method: 'GET',
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headers: {
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...headers as HeadersInit,
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'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36',
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}
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});
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if (!response.ok) {
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throw new Error(`Failed to fetch TS file: ${response.status} ${response.statusText}`);
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}
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// Set appropriate headers for each video segment
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setResponseHeaders(event, {
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'Content-Type': 'video/mp2t',
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'Access-Control-Allow-Origin': '*',
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'Access-Control-Allow-Headers': '*',
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'Access-Control-Allow-Methods': '*',
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'Cache-Control': 'public, max-age=3600' // Allow caching of TS segments
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});
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// Return the binary data directly - Nitro should handle this properly
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return new Uint8Array(await response.arrayBuffer());
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} catch (error: any) {
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console.error('Error proxying TS file:', error);
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return sendError(event, createError({
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statusCode: error.response?.status || 500,
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statusMessage: error.message || 'Error proxying TS file'
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}));
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}
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});
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