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Copy pathhttpserver.ts
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106 lines (94 loc) · 3.15 KB
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import { logger } from "@coder/logger"
import * as express from "express"
import * as http from "http"
import nodeFetch, { RequestInit, Response } from "node-fetch"
import Websocket from "ws"
import { Disposable } from "../../src/common/emitter"
import * as util from "../../src/common/util"
import { ensureAddress } from "../../src/node/app"
import { disposer } from "../../src/node/http"
import { handleUpgrade } from "../../src/node/wsRouter"
// Perhaps an abstraction similar to this should be used in app.ts as well.
export class HttpServer {
private hs: http.Server
public dispose: Disposable["dispose"]
/**
* Expects a server and a disposal that cleans up the server (and anything
* else that may need cleanup).
*
* Otherwise a new server is created.
*/
public constructor(server?: { server: http.Server; dispose: Disposable["dispose"] }) {
this.hs = server?.server || http.createServer()
this.dispose = server?.dispose || disposer(this.hs)
}
/**
* listen starts the server on a random localhost port.
* Use close to cleanup when done.
*/
public listen(fn: http.RequestListener): Promise<void> {
this.hs.on("request", fn)
return new Promise((resolve, reject) => {
this.hs.on("error", reject)
this.hs.listen(0, "127.0.0.1", () => {
this.hs.off("error", reject)
resolve()
this.hs.on("error", (err) => {
// Promise resolved earlier so this is some other error.
util.logError(logger, "http server error", err)
})
})
})
}
/**
* Send upgrade requests to an Express app.
*/
public listenUpgrade(app: express.Express): void {
handleUpgrade(app, this.hs)
}
/**
* fetch fetches the request path.
* The request path must be rooted!
*/
public fetch(requestPath: string, opts?: RequestInit, query?: { [key: string]: string }): Promise<Response> {
const address = ensureAddress(this.hs, "http")
if (typeof address === "string") {
throw new Error("Cannot fetch socket path")
}
address.pathname = requestPath
if (query) {
Object.keys(query).forEach((key) => {
address.searchParams.append(key, query[key])
})
}
return nodeFetch(address.toString(), opts)
}
/**
* Open a websocket against the request path.
*/
public ws(requestPath: string, options?: Websocket.ClientOptions): Websocket {
const address = ensureAddress(this.hs, "ws")
if (typeof address === "string") {
throw new Error("Cannot open websocket to socket path")
}
address.pathname = requestPath
return new Websocket(address.toString(), options)
}
/**
* Open a websocket and wait for it to fully open.
*/
public wsWait(requestPath: string, options?: Websocket.ClientOptions): Promise<Websocket> {
const ws = this.ws(requestPath, options)
return new Promise<Websocket>((resolve, reject) => {
ws.on("error", (err) => reject(err))
ws.on("open", () => resolve(ws))
})
}
public port(): number {
const addr = this.hs.address()
if (addr && typeof addr === "object") {
return addr.port
}
throw new Error("server not listening or listening on unix socket")
}
}