1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
import { readFileSync, statSync } from "node:fs";
import { createSecureServer, constants as httpConstants } from "node:http2";
import path from "node:path";
const port = process.env.PORT ?? process.argv[2] ?? 8433;
const serverRoot = process.env.SERVER_ROOT ?? "./app";
const keyPath = process.env.KEY_PATH ?? "./server.key";
const certPath = process.env.CERT_PATH ?? "./server.pem";
const hstsMaxAge = process.env.HSTS_MAX_AGE ?? "31536000";
const corsOrigin = process.env.CORS_ORIGIN ?? "*";
const mimeType = {
".css": "text/css",
".doc": "application/msword",
".eot": "application/vnd.ms-fontobject",
".html": "text/html",
".ico": "image/x-icon",
".jpg": "image/jpeg",
".js": "text/javascript",
".json": "application/json",
".mp3": "audio/mpeg",
".pdf": "application/pdf",
".png": "image/png",
".svg": "image/svg+xml",
".ttf": "application/x-font-ttf",
".wav": "audio/wav",
".zip": "application/zip",
};
const {
HTTP2_HEADER_PATH: HEADER_PATH,
HTTP2_HEADER_METHOD: HEADER_METHOD,
HTTP_STATUS_NOT_FOUND: STATUS_NOT_FOUND,
HTTP_STATUS_INTERNAL_SERVER_ERROR: STATUS_SERVER_ERROR,
} = httpConstants;
const HEADER_ORIGIN = "origin";
/**
* HTTP/2 secure server instance
* @type {import('node:http2').Http2SecureServer}
*/
let server;
try {
server = createSecureServer({
cert: readFileSync(certPath),
key: readFileSync(keyPath),
});
} catch (error) {
if (error && "code" in error && error.code === "ENOENT") {
console.error(`Certificate error: Could not find key or cert files at ${keyPath}, ${certPath}`);
console.error("Please set KEY_PATH and CERT_PATH environment variables");
process.exit(1);
}
throw error;
}
/**
* Handles stream errors and sends appropriate HTTP responses
* @param {unknown} err - The error object
* @param {import('node:http2').ServerHttp2Stream} stream - The HTTP/2 stream to respond on
* @param {string | undefined} origin - The request origin for CORS headers
*/
const handleStreamError = (err, stream, origin) => {
console.error("Stream error:", err);
let status = STATUS_SERVER_ERROR;
if (err && "code" in err && typeof err.code === "string") {
status = err.code === "ENOENT" ? STATUS_NOT_FOUND : STATUS_SERVER_ERROR;
}
const body = status === STATUS_NOT_FOUND ? "Not Found" : "Internal Server Error";
stream.respond({
":status": status,
...getResponseHeaders("text/plain", origin),
"content-length": body.length.toString(),
});
stream.end(body);
};
/**
* Generates common response headers including HSTS and CORS
* @param {string} mimeType - The MIME type for content-type header
* @param {string|undefined} ro - The Origin header from the request
* @returns {Object.<string, string>} Object containing response headers
*/
const getResponseHeaders = (mimeType, ro) => {
let acao = "*";
if (corsOrigin !== "*") {
const allowed = corsOrigin.split(",").map((s) => s.trim());
acao = ro && allowed.includes(ro) ? ro : allowed[0] || "";
}
return {
"access-control-allow-credentials": "true",
"access-control-allow-headers": "Content-Type, Authorization",
"access-control-allow-methods": "GET, HEAD, OPTIONS",
"access-control-allow-origin": acao,
"content-type": mimeType,
"strict-transport-security": `max-age=${hstsMaxAge}; includeSubDomains`,
};
};
/**
* Handles incoming HTTP/2 streams
* @param {import('node:http2').ServerHttp2Stream} stream - The HTTP/2 stream
* @param {import('node:http2').IncomingHttpHeaders} headers - Request headers
* @param {number} flags - Stream flags
*/
server.on("stream", (stream, headers) => {
const reqPath = headers[HEADER_PATH] || "/";
const reqMethod = headers[HEADER_METHOD] || "GET";
const requestOrigin =
typeof headers[HEADER_ORIGIN] === "string" ? headers[HEADER_ORIGIN] : undefined;
// Handle CORS preflight requests
if (reqMethod === "OPTIONS") {
stream.respond({
":status": 204,
...getResponseHeaders("text/plain", requestOrigin),
"content-length": "0",
});
stream.end();
return;
}
// Only allow GET and HEAD methods
if (!["GET", "HEAD"].includes(reqMethod)) {
stream.respond({
":status": 405,
allow: "GET, HEAD, OPTIONS",
...getResponseHeaders("text/plain", requestOrigin),
});
stream.end("Method Not Allowed");
return;
}
let fullPath = path.join(serverRoot, reqPath);
try {
const stats = statSync(fullPath);
if (stats.isDirectory()) {
fullPath = path.join(fullPath, "index.html");
}
} catch (error) {
handleStreamError(error, stream, requestOrigin);
return;
}
const ext = path.extname(fullPath);
const responseMimeType = mimeType[ext] || "text/plain";
stream.respondWithFile(
fullPath,
{ ...getResponseHeaders(responseMimeType, requestOrigin) },
{ onError: (err) => handleStreamError(err, stream, requestOrigin) },
);
});
/**
* Handles graceful shutdown of the server
* @param {string} signal - The signal that triggered shutdown (SIGTERM, SIGINT, etc.)
*/
const gracefulShutdown = (signal) => {
console.log(`\nReceived ${signal}, shutting down gracefully...`);
server.close((err) => {
if (err) {
console.error("Error during server shutdown:", err);
process.exit(1);
}
console.log("Server closed successfully");
process.exit(0);
});
// Force close after 10 seconds
setTimeout(() => {
console.error("Forcing server closure after timeout");
process.exit(1);
}, 2000);
};
process.on("SIGTERM", () => gracefulShutdown("SIGTERM"));
process.on("SIGINT", () => gracefulShutdown("SIGINT"));
/**
* Handles uncaught exceptions
* @param {Error} error - The uncaught error
*/
process.on("uncaughtException", (error) => {
console.error("Uncaught Exception:", error);
gracefulShutdown("uncaughtException");
});
/**
* Handles unhandled promise rejections
* @param {any} reason - The rejection reason
* @param {Promise<unknown>} promise - The promise that was rejected
*/
process.on("unhandledRejection", (reason, promise) => {
console.error("Unhandled Rejection at:", promise, "reason:", reason);
gracefulShutdown("unhandledRejection");
});
/**
* Starts the HTTP/2 server and begins listening for connections
*/
server.listen(parseInt(port, 10), "localhost", () => {
console.log(`
Server running on https://localhost:${port}
Environment: ${process.env.NODE_ENV || "development"}
Server root: ${serverRoot}
CORS origin: ${corsOrigin}
HSTS max-age: ${hstsMaxAge}
`);
});
|
