106 lines
2.5 KiB
JavaScript
106 lines
2.5 KiB
JavaScript
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'use strict'
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const { InvalidArgumentError, RequestAbortedError, SocketError } = require('../core/errors')
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const { AsyncResource } = require('async_hooks')
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const util = require('../core/util')
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const { addSignal, removeSignal } = require('./abort-signal')
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const assert = require('assert')
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class UpgradeHandler extends AsyncResource {
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constructor (opts, callback) {
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if (!opts || typeof opts !== 'object') {
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throw new InvalidArgumentError('invalid opts')
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}
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if (typeof callback !== 'function') {
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throw new InvalidArgumentError('invalid callback')
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}
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const { signal, opaque, responseHeaders } = opts
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if (signal && typeof signal.on !== 'function' && typeof signal.addEventListener !== 'function') {
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throw new InvalidArgumentError('signal must be an EventEmitter or EventTarget')
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}
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super('UNDICI_UPGRADE')
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this.responseHeaders = responseHeaders || null
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this.opaque = opaque || null
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this.callback = callback
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this.abort = null
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this.context = null
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addSignal(this, signal)
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}
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onConnect (abort, context) {
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if (!this.callback) {
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throw new RequestAbortedError()
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}
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this.abort = abort
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this.context = null
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}
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onHeaders () {
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throw new SocketError('bad upgrade', null)
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}
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onUpgrade (statusCode, rawHeaders, socket) {
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const { callback, opaque, context } = this
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assert.strictEqual(statusCode, 101)
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removeSignal(this)
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this.callback = null
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const headers = this.responseHeaders === 'raw' ? util.parseRawHeaders(rawHeaders) : util.parseHeaders(rawHeaders)
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this.runInAsyncScope(callback, null, null, {
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headers,
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socket,
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opaque,
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context
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})
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}
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onError (err) {
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const { callback, opaque } = this
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removeSignal(this)
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if (callback) {
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this.callback = null
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queueMicrotask(() => {
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this.runInAsyncScope(callback, null, err, { opaque })
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})
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}
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}
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}
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function upgrade (opts, callback) {
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if (callback === undefined) {
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return new Promise((resolve, reject) => {
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upgrade.call(this, opts, (err, data) => {
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return err ? reject(err) : resolve(data)
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})
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})
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}
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try {
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const upgradeHandler = new UpgradeHandler(opts, callback)
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this.dispatch({
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...opts,
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method: opts.method || 'GET',
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upgrade: opts.protocol || 'Websocket'
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}, upgradeHandler)
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} catch (err) {
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if (typeof callback !== 'function') {
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throw err
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}
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const opaque = opts && opts.opaque
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queueMicrotask(() => callback(err, { opaque }))
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}
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}
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module.exports = upgrade
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