1 files changed, 497 insertions, 0 deletions
diff --git a/vanilla/node_modules/undici/lib/web/websocket/stream/websocketstream.js b/vanilla/node_modules/undici/lib/web/websocket/stream/websocketstream.js
new file mode 100644
index 0000000..ce3be84
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+++ b/vanilla/node_modules/undici/lib/web/websocket/stream/websocketstream.js
@@ -0,0 +1,497 @@
+'use strict'
+
+const { createDeferredPromise } = require('../../../util/promise')
+const { environmentSettingsObject } = require('../../fetch/util')
+const { states, opcodes, sentCloseFrameState } = require('../constants')
+const { webidl } = require('../../webidl')
+const { getURLRecord, isValidSubprotocol, isEstablished, utf8Decode } = require('../util')
+const { establishWebSocketConnection, failWebsocketConnection, closeWebSocketConnection } = require('../connection')
+const { channels } = require('../../../core/diagnostics')
+const { WebsocketFrameSend } = require('../frame')
+const { ByteParser } = require('../receiver')
+const { WebSocketError, createUnvalidatedWebSocketError } = require('./websocketerror')
+const { kEnumerableProperty } = require('../../../core/util')
+const { utf8DecodeBytes } = require('../../../encoding')
+
+let emittedExperimentalWarning = false
+
+class WebSocketStream {
+  // Each WebSocketStream object has an associated url , which is a URL record .
+  /** @type {URL} */
+  #url
+
+  // Each WebSocketStream object has an associated opened promise , which is a promise.
+  /** @type {import('../../../util/promise').DeferredPromise} */
+  #openedPromise
+
+  // Each WebSocketStream object has an associated closed promise , which is a promise.
+  /** @type {import('../../../util/promise').DeferredPromise} */
+  #closedPromise
+
+  // Each WebSocketStream object has an associated readable stream , which is a ReadableStream .
+  /** @type {ReadableStream} */
+  #readableStream
+  /** @type {ReadableStreamDefaultController} */
+  #readableStreamController
+
+  // Each WebSocketStream object has an associated writable stream , which is a WritableStream .
+  /** @type {WritableStream} */
+  #writableStream
+
+  // Each WebSocketStream object has an associated boolean handshake aborted , which is initially false.
+  #handshakeAborted = false
+
+  /** @type {import('../websocket').Handler} */
+  #handler = {
+    // https://whatpr.org/websockets/48/7b748d3...d5570f3.html#feedback-to-websocket-stream-from-the-protocol
+    onConnectionEstablished: (response, extensions) => this.#onConnectionEstablished(response, extensions),
+    onMessage: (opcode, data) => this.#onMessage(opcode, data),
+    onParserError: (err) => failWebsocketConnection(this.#handler, null, err.message),
+    onParserDrain: () => this.#handler.socket.resume(),
+    onSocketData: (chunk) => {
+      if (!this.#parser.write(chunk)) {
+        this.#handler.socket.pause()
+      }
+    },
+    onSocketError: (err) => {
+      this.#handler.readyState = states.CLOSING
+
+      if (channels.socketError.hasSubscribers) {
+        channels.socketError.publish(err)
+      }
+
+      this.#handler.socket.destroy()
+    },
+    onSocketClose: () => this.#onSocketClose(),
+    onPing: () => {},
+    onPong: () => {},
+
+    readyState: states.CONNECTING,
+    socket: null,
+    closeState: new Set(),
+    controller: null,
+    wasEverConnected: false
+  }
+
+  /** @type {import('../receiver').ByteParser} */
+  #parser
+
+  constructor (url, options = undefined) {
+    if (!emittedExperimentalWarning) {
+      process.emitWarning('WebSocketStream is experimental! Expect it to change at any time.', {
+        code: 'UNDICI-WSS'
+      })
+      emittedExperimentalWarning = true
+    }
+
+    webidl.argumentLengthCheck(arguments, 1, 'WebSocket')
+
+    url = webidl.converters.USVString(url)
+    if (options !== null) {
+      options = webidl.converters.WebSocketStreamOptions(options)
+    }
+
+    // 1. Let baseURL be this 's relevant settings object 's API base URL .
+    const baseURL = environmentSettingsObject.settingsObject.baseUrl
+
+    // 2. Let urlRecord be the result of getting a URL record given url and baseURL .
+    const urlRecord = getURLRecord(url, baseURL)
+
+    // 3. Let protocols be options [" protocols "] if it exists , otherwise an empty sequence.
+    const protocols = options.protocols
+
+    // 4. If any of the values in protocols occur more than once or otherwise fail to match the requirements for elements that comprise the value of ` Sec-WebSocket-Protocol ` fields as defined by The WebSocket Protocol , then throw a " SyntaxError " DOMException . [WSP]
+    if (protocols.length !== new Set(protocols.map(p => p.toLowerCase())).size) {
+      throw new DOMException('Invalid Sec-WebSocket-Protocol value', 'SyntaxError')
+    }
+
+    if (protocols.length > 0 && !protocols.every(p => isValidSubprotocol(p))) {
+      throw new DOMException('Invalid Sec-WebSocket-Protocol value', 'SyntaxError')
+    }
+
+    // 5. Set this 's url to urlRecord .
+    this.#url = urlRecord.toString()
+
+    // 6. Set this 's opened promise and closed promise to new promises.
+    this.#openedPromise = createDeferredPromise()
+    this.#closedPromise = createDeferredPromise()
+
+    // 7. Apply backpressure to the WebSocket.
+    // TODO
+
+    // 8.  If options [" signal "] exists ,
+    if (options.signal != null) {
+      // 8.1. Let signal be options [" signal "].
+      const signal = options.signal
+
+      // 8.2. If signal is aborted , then reject this 's opened promise and closed promise with signal ’s abort reason
+      //      and return.
+      if (signal.aborted) {
+        this.#openedPromise.reject(signal.reason)
+        this.#closedPromise.reject(signal.reason)
+        return
+      }
+
+      // 8.3. Add the following abort steps to signal :
+      signal.addEventListener('abort', () => {
+        // 8.3.1. If the WebSocket connection is not yet established : [WSP]
+        if (!isEstablished(this.#handler.readyState)) {
+          // 8.3.1.1. Fail the WebSocket connection .
+          failWebsocketConnection(this.#handler)
+
+          // Set this 's ready state to CLOSING .
+          this.#handler.readyState = states.CLOSING
+
+          // Reject this 's opened promise and closed promise with signal ’s abort reason .
+          this.#openedPromise.reject(signal.reason)
+          this.#closedPromise.reject(signal.reason)
+
+          // Set this 's handshake aborted to true.
+          this.#handshakeAborted = true
+        }
+      }, { once: true })
+    }
+
+    // 9.  Let client be this 's relevant settings object .
+    const client = environmentSettingsObject.settingsObject
+
+    // 10. Run this step in parallel :
+    // 10.1. Establish a WebSocket connection given urlRecord , protocols , and client . [FETCH]
+    this.#handler.controller = establishWebSocketConnection(
+      urlRecord,
+      protocols,
+      client,
+      this.#handler,
+      options
+    )
+  }
+
+  // The url getter steps are to return this 's url , serialized .
+  get url () {
+    return this.#url.toString()
+  }
+
+  // The opened getter steps are to return this 's opened promise .
+  get opened () {
+    return this.#openedPromise.promise
+  }
+
+  // The closed getter steps are to return this 's closed promise .
+  get closed () {
+    return this.#closedPromise.promise
+  }
+
+  // The close( closeInfo ) method steps are:
+  close (closeInfo = undefined) {
+    if (closeInfo !== null) {
+      closeInfo = webidl.converters.WebSocketCloseInfo(closeInfo)
+    }
+
+    // 1. Let code be closeInfo [" closeCode "] if present, or null otherwise.
+    const code = closeInfo.closeCode ?? null
+
+    // 2. Let reason be closeInfo [" reason "].
+    const reason = closeInfo.reason
+
+    // 3. Close the WebSocket with this , code , and reason .
+    closeWebSocketConnection(this.#handler, code, reason, true)
+  }
+
+  #write (chunk) {
+    // See /websockets/stream/tentative/write.any.html
+    chunk = webidl.converters.WebSocketStreamWrite(chunk)
+
+    // 1. Let promise be a new promise created in stream ’s relevant realm .
+    const promise = createDeferredPromise()
+
+    // 2. Let data be null.
+    let data = null
+
+    // 3. Let opcode be null.
+    let opcode = null
+
+    // 4. If chunk is a BufferSource ,
+    if (webidl.is.BufferSource(chunk)) {
+      // 4.1. Set data to a copy of the bytes given chunk .
+      data = new Uint8Array(ArrayBuffer.isView(chunk) ? new Uint8Array(chunk.buffer, chunk.byteOffset, chunk.byteLength) : chunk.slice())
+
+      // 4.2. Set opcode to a binary frame opcode.
+      opcode = opcodes.BINARY
+    } else {
+      // 5. Otherwise,
+
+      // 5.1. Let string be the result of converting chunk to an IDL USVString .
+      //    If this throws an exception, return a promise rejected with the exception.
+      let string
+
+      try {
+        string = webidl.converters.DOMString(chunk)
+      } catch (e) {
+        promise.reject(e)
+        return promise.promise
+      }
+
+      // 5.2. Set data to the result of UTF-8 encoding string .
+      data = new TextEncoder().encode(string)
+
+      // 5.3. Set opcode to a text frame opcode.
+      opcode = opcodes.TEXT
+    }
+
+    // 6. In parallel,
+    // 6.1. Wait until there is sufficient buffer space in stream to send the message.
+
+    // 6.2. If the closing handshake has not yet started , Send a WebSocket Message to stream comprised of data using opcode .
+    if (!this.#handler.closeState.has(sentCloseFrameState.SENT) && !this.#handler.closeState.has(sentCloseFrameState.RECEIVED)) {
+      const frame = new WebsocketFrameSend(data)
+
+      this.#handler.socket.write(frame.createFrame(opcode), () => {
+        promise.resolve(undefined)
+      })
+    }
+
+    // 6.3. Queue a global task on the WebSocket task source given stream ’s relevant global object to resolve promise with undefined.
+    return promise.promise
+  }
+
+  /** @type {import('../websocket').Handler['onConnectionEstablished']} */
+  #onConnectionEstablished (response, parsedExtensions) {
+    this.#handler.socket = response.socket
+
+    const parser = new ByteParser(this.#handler, parsedExtensions)
+    parser.on('drain', () => this.#handler.onParserDrain())
+    parser.on('error', (err) => this.#handler.onParserError(err))
+
+    this.#parser = parser
+
+    // 1. Change stream ’s ready state to OPEN (1).
+    this.#handler.readyState = states.OPEN
+
+    // 2. Set stream ’s was ever connected to true.
+    // This is done in the opening handshake.
+
+    // 3. Let extensions be the extensions in use .
+    const extensions = parsedExtensions ?? ''
+
+    // 4. Let protocol be the subprotocol in use .
+    const protocol = response.headersList.get('sec-websocket-protocol') ?? ''
+
+    // 5. Let pullAlgorithm be an action that pulls bytes from stream .
+    // 6. Let cancelAlgorithm be an action that cancels stream with reason , given reason .
+    // 7. Let readable be a new ReadableStream .
+    // 8. Set up readable with pullAlgorithm and cancelAlgorithm .
+    const readable = new ReadableStream({
+      start: (controller) => {
+        this.#readableStreamController = controller
+      },
+      pull (controller) {
+        let chunk
+        while (controller.desiredSize > 0 && (chunk = response.socket.read()) !== null) {
+          controller.enqueue(chunk)
+        }
+      },
+      cancel: (reason) => this.#cancel(reason)
+    })
+
+    // 9. Let writeAlgorithm be an action that writes chunk to stream , given chunk .
+    // 10. Let closeAlgorithm be an action that closes stream .
+    // 11. Let abortAlgorithm be an action that aborts stream with reason , given reason .
+    // 12. Let writable be a new WritableStream .
+    // 13. Set up writable with writeAlgorithm , closeAlgorithm , and abortAlgorithm .
+    const writable = new WritableStream({
+      write: (chunk) => this.#write(chunk),
+      close: () => closeWebSocketConnection(this.#handler, null, null),
+      abort: (reason) => this.#closeUsingReason(reason)
+    })
+
+    // Set stream ’s readable stream to readable .
+    this.#readableStream = readable
+
+    // Set stream ’s writable stream to writable .
+    this.#writableStream = writable
+
+    // Resolve stream ’s opened promise with WebSocketOpenInfo «[ " extensions " → extensions , " protocol " → protocol , " readable " → readable , " writable " → writable ]».
+    this.#openedPromise.resolve({
+      extensions,
+      protocol,
+      readable,
+      writable
+    })
+  }
+
+  /** @type {import('../websocket').Handler['onMessage']} */
+  #onMessage (type, data) {
+    // 1. If stream’s ready state is not OPEN (1), then return.
+    if (this.#handler.readyState !== states.OPEN) {
+      return
+    }
+
+    // 2. Let chunk be determined by switching on type:
+    //      - type indicates that the data is Text
+    //          a new DOMString containing data
+    //      - type indicates that the data is Binary
+    //          a new Uint8Array object, created in the relevant Realm of the
+    //          WebSocketStream object, whose contents are data
+    let chunk
+
+    if (type === opcodes.TEXT) {
+      try {
+        chunk = utf8Decode(data)
+      } catch {
+        failWebsocketConnection(this.#handler, 'Received invalid UTF-8 in text frame.')
+        return
+      }
+    } else if (type === opcodes.BINARY) {
+      chunk = new Uint8Array(data.buffer, data.byteOffset, data.byteLength)
+    }
+
+    // 3. Enqueue chunk into stream’s readable stream.
+    this.#readableStreamController.enqueue(chunk)
+
+    // 4. Apply backpressure to the WebSocket.
+  }
+
+  /** @type {import('../websocket').Handler['onSocketClose']} */
+  #onSocketClose () {
+    const wasClean =
+      this.#handler.closeState.has(sentCloseFrameState.SENT) &&
+      this.#handler.closeState.has(sentCloseFrameState.RECEIVED)
+
+    // 1. Change the ready state to CLOSED (3).
+    this.#handler.readyState = states.CLOSED
+
+    // 2. If stream ’s handshake aborted is true, then return.
+    if (this.#handshakeAborted) {
+      return
+    }
+
+    // 3. If stream ’s was ever connected is false, then reject stream ’s opened promise with a new WebSocketError.
+    if (!this.#handler.wasEverConnected) {
+      this.#openedPromise.reject(new WebSocketError('Socket never opened'))
+    }
+
+    const result = this.#parser?.closingInfo
+
+    // 4. Let code be the WebSocket connection close code .
+    // https://datatracker.ietf.org/doc/html/rfc6455#section-7.1.5
+    // If this Close control frame contains no status code, _The WebSocket
+    // Connection Close Code_ is considered to be 1005. If _The WebSocket
+    // Connection is Closed_ and no Close control frame was received by the
+    // endpoint (such as could occur if the underlying transport connection
+    // is lost), _The WebSocket Connection Close Code_ is considered to be
+    // 1006.
+    let code = result?.code ?? 1005
+
+    if (!this.#handler.closeState.has(sentCloseFrameState.SENT) && !this.#handler.closeState.has(sentCloseFrameState.RECEIVED)) {
+      code = 1006
+    }
+
+    // 5. Let reason be the result of applying UTF-8 decode without BOM to the WebSocket connection close reason .
+    const reason = result?.reason == null ? '' : utf8DecodeBytes(Buffer.from(result.reason))
+
+    // 6. If the connection was closed cleanly ,
+    if (wasClean) {
+      // 6.1. Close stream ’s readable stream .
+      this.#readableStreamController.close()
+
+      // 6.2. Error stream ’s writable stream with an " InvalidStateError " DOMException indicating that a closed WebSocketStream cannot be written to.
+      if (!this.#writableStream.locked) {
+        this.#writableStream.abort(new DOMException('A closed WebSocketStream cannot be written to', 'InvalidStateError'))
+      }
+
+      // 6.3. Resolve stream ’s closed promise with WebSocketCloseInfo «[ " closeCode " → code , " reason " → reason ]».
+      this.#closedPromise.resolve({
+        closeCode: code,
+        reason
+      })
+    } else {
+      // 7. Otherwise,
+
+      // 7.1. Let error be a new WebSocketError whose closeCode is code and reason is reason .
+      const error = createUnvalidatedWebSocketError('unclean close', code, reason)
+
+      // 7.2. Error stream ’s readable stream with error .
+      this.#readableStreamController?.error(error)
+
+      // 7.3. Error stream ’s writable stream with error .
+      this.#writableStream?.abort(error)
+
+      // 7.4. Reject stream ’s closed promise with error .
+      this.#closedPromise.reject(error)
+    }
+  }
+
+  #closeUsingReason (reason) {
+    // 1. Let code be null.
+    let code = null
+
+    // 2. Let reasonString be the empty string.
+    let reasonString = ''
+
+    // 3. If reason implements WebSocketError ,
+    if (webidl.is.WebSocketError(reason)) {
+      // 3.1. Set code to reason ’s closeCode .
+      code = reason.closeCode
+
+      // 3.2. Set reasonString to reason ’s reason .
+      reasonString = reason.reason
+    }
+
+    // 4. Close the WebSocket with stream , code , and reasonString . If this throws an exception,
+    //    discard code and reasonString and close the WebSocket with stream .
+    closeWebSocketConnection(this.#handler, code, reasonString)
+  }
+
+  //  To cancel a WebSocketStream stream given reason , close using reason giving stream and reason .
+  #cancel (reason) {
+    this.#closeUsingReason(reason)
+  }
+}
+
+Object.defineProperties(WebSocketStream.prototype, {
+  url: kEnumerableProperty,
+  opened: kEnumerableProperty,
+  closed: kEnumerableProperty,
+  close: kEnumerableProperty,
+  [Symbol.toStringTag]: {
+    value: 'WebSocketStream',
+    writable: false,
+    enumerable: false,
+    configurable: true
+  }
+})
+
+webidl.converters.WebSocketStreamOptions = webidl.dictionaryConverter([
+  {
+    key: 'protocols',
+    converter: webidl.sequenceConverter(webidl.converters.USVString),
+    defaultValue: () => []
+  },
+  {
+    key: 'signal',
+    converter: webidl.nullableConverter(webidl.converters.AbortSignal),
+    defaultValue: () => null
+  }
+])
+
+webidl.converters.WebSocketCloseInfo = webidl.dictionaryConverter([
+  {
+    key: 'closeCode',
+    converter: (V) => webidl.converters['unsigned short'](V, webidl.attributes.EnforceRange)
+  },
+  {
+    key: 'reason',
+    converter: webidl.converters.USVString,
+    defaultValue: () => ''
+  }
+])
+
+webidl.converters.WebSocketStreamWrite = function (V) {
+  if (typeof V === 'string') {
+    return webidl.converters.USVString(V)
+  }
+
+  return webidl.converters.BufferSource(V)
+}
+
+module.exports = { WebSocketStream }