code-server/src/node/vscodeSocket.ts at asher/enable-webkit · coder/code-server · GitHub

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import { logger } from "@coder/logger"

import express from "express"

import * as http from "http"

import * as path from "path"

import { HttpCode, HttpError } from "../common/http"

import { listen } from "./app"

import { errorHandler } from "./routes/errors"

import { canConnect } from "./util"

export interface EditorSessionEntry {

workspace: {

id: string

folders: {

uri: {

path: string

}

}[]

}

socketPath: string

}

interface DeleteSessionRequest {

socketPath?: string

}

interface AddSessionRequest {

entry?: EditorSessionEntry

}

interface GetSessionResponse {

socketPath?: string

}

export async function makeEditorSessionManagerServer(

codeServerSocketPath: string,

editorSessionManager: EditorSessionManager,

): Promise<http.Server> {

const router = express()

router.use(express.json())

router.get<{}, GetSessionResponse | string | unknown, undefined, { filePath?: string }>(

"/session",

async (req, res) => {

const filePath = req.query.filePath

if (!filePath) {

throw new HttpError("filePath is required", HttpCode.BadRequest)

}

const socketPath = await editorSessionManager.getConnectedSocketPath(filePath)

const response: GetSessionResponse = { socketPath }

res.json(response)

)

router.post<{}, string, AddSessionRequest | undefined>("/add-session", async (req, res) => {

const entry = req.body?.entry

if (!entry) {

throw new HttpError("entry is required", HttpCode.BadRequest)

}

editorSessionManager.addSession(entry)

res.status(200).send("session added")

})

router.post<{}, string, DeleteSessionRequest | undefined>("/delete-session", async (req, res) => {

const socketPath = req.body?.socketPath

if (!socketPath) {

throw new HttpError("socketPath is required", HttpCode.BadRequest)

}

editorSessionManager.deleteSession(socketPath)

res.status(200).send("session deleted")

})

router.use(errorHandler)

const server = http.createServer(router)

try {

await listen(server, { socket: codeServerSocketPath })

} catch (e) {

logger.warn(`Could not create socket at ${codeServerSocketPath}`)

}

return server

}

export class EditorSessionManager {

// Map from socket path to EditorSessionEntry.

private entries = new Map<string, EditorSessionEntry>()

addSession(entry: EditorSessionEntry): void {

logger.debug(`Adding session to session registry: ${entry.socketPath}`)

this.entries.set(entry.socketPath, entry)

}

getCandidatesForFile(filePath: string): EditorSessionEntry[] {

const matchCheckResults = new Map<string, boolean>()

const checkMatch = (entry: EditorSessionEntry): boolean => {

if (matchCheckResults.has(entry.socketPath)) {

return matchCheckResults.get(entry.socketPath)!

}

const result = entry.workspace.folders.some((folder) => filePath.startsWith(folder.uri.path + path.sep))

matchCheckResults.set(entry.socketPath, result)

return result

}

return Array.from(this.entries.values())

.reverse() // Most recently registered first.

.sort((a, b) => {

// Matches first.

const aMatch = checkMatch(a)

const bMatch = checkMatch(b)

if (aMatch === bMatch) {

return 0

}

if (aMatch) {

return -1

}

return 1

})

}

deleteSession(socketPath: string): void {

logger.debug(`Deleting session from session registry: ${socketPath}`)

this.entries.delete(socketPath)

}

/**

* Returns the best socket path that we can connect to.

* We also delete any sockets that we can't connect to.

async getConnectedSocketPath(filePath: string): Promise<string | undefined> {

const candidates = this.getCandidatesForFile(filePath)

let match: EditorSessionEntry | undefined = undefined

for (const candidate of candidates) {

if (await canConnect(candidate.socketPath)) {

match = candidate

break

}

this.deleteSession(candidate.socketPath)

}

return match?.socketPath

}

export class EditorSessionManagerClient {

constructor(private codeServerSocketPath: string) {}

async canConnect() {

return canConnect(this.codeServerSocketPath)

}

async getConnectedSocketPath(filePath: string): Promise<string | undefined> {

const response = await new Promise<GetSessionResponse>((resolve, reject) => {

const opts = {

path: "/session?filePath=" + encodeURIComponent(filePath),

socketPath: this.codeServerSocketPath,

method: "GET",

}

const req = http.request(opts, (res) => {

let rawData = ""

res.setEncoding("utf8")

res.on("data", (chunk) => {

rawData += chunk

})

res.on("end", () => {

try {

const obj = JSON.parse(rawData)

if (res.statusCode === 200) {

resolve(obj)

} else {

reject(new Error("Unexpected status code: " + res.statusCode))

}

} catch (e: unknown) {

reject(e)

}

})

req.on("error", reject)

req.end()

})

return response.socketPath

}

// Currently only used for tests.

async addSession(request: AddSessionRequest): Promise<void> {

await new Promise<void>((resolve, reject) => {

const opts = {

path: "/add-session",

socketPath: this.codeServerSocketPath,

method: "POST",

headers: {

"content-type": "application/json",

accept: "application/json",

}

const req = http.request(opts, () => {

resolve()

})

req.on("error", reject)

req.write(JSON.stringify(request))

req.end()

})

}

code-server/src/node/vscodeSocket.ts at asher/enable-webkit · coder/code-server · GitHub

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