-
Notifications
You must be signed in to change notification settings - Fork 6.7k
Expand file tree
/
Copy pathproxy.ts
More file actions
42 lines (38 loc) · 1.62 KB
/
Copy pathproxy.ts
File metadata and controls
42 lines (38 loc) · 1.62 KB
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
import * as cookie from "cookie"
import type { Request } from "express"
import proxyServer from "http-proxy"
import { getCookieSessionName, HttpCode } from "../common/http"
export const proxy = proxyServer.createProxyServer({})
// The error handler catches when the proxy fails to connect (for example when
// there is nothing running on the target port).
proxy.on("error", (error, _, res) => {
// This could be for either a web socket or a regular request. Despite what
// the types say, writeHead() will not exist on web socket requests (nor will
// status() from Express). But writing out the code manually does not work
// for regular requests thus the branching behavior.
if (typeof res.writeHead !== "undefined") {
res.writeHead(HttpCode.ServerError)
res.end(error.message)
} else {
res.end(`HTTP/1.1 ${HttpCode.ServerError} ${error.message}\r\n\r\n`)
}
})
// Strip the code-server cookie if it exists to avoid transmitting the cookie
// to potentially malicious local ports.
proxy.on("proxyReq", (preq, req) => {
const cookieSessionName = getCookieSessionName((req as Request).args["cookie-suffix"])
preq.setHeader(
"Cookie",
cookie.stringifyCookie({
...(req as Request).cookies,
[cookieSessionName]: undefined,
}),
)
})
// Intercept the response to rewrite absolute redirects against the base path.
// Is disabled when the request has no base path which means /absproxy is in use.
proxy.on("proxyRes", (res, req) => {
if (res.headers.location && res.headers.location.startsWith("/") && (req as any).base) {
res.headers.location = (req as any).base + res.headers.location
}
})