feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

1 files changed, 329 insertions, 0 deletions

diff --git a/vanilla/node_modules/undici/lib/web/websocket/connection.js b/vanilla/node_modules/undici/lib/web/websocket/connection.js
new file mode 100644
index 0000000..4ecc8a1
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/web/websocket/connection.js
@@ -0,0 +1,329 @@
+'use strict'
+
+const { uid, states, sentCloseFrameState, emptyBuffer, opcodes } = require('./constants')
+const { parseExtensions, isClosed, isClosing, isEstablished, isConnecting, validateCloseCodeAndReason } = require('./util')
+const { makeRequest } = require('../fetch/request')
+const { fetching } = require('../fetch/index')
+const { Headers, getHeadersList } = require('../fetch/headers')
+const { getDecodeSplit } = require('../fetch/util')
+const { WebsocketFrameSend } = require('./frame')
+const assert = require('node:assert')
+const { runtimeFeatures } = require('../../util/runtime-features')
+
+const crypto = runtimeFeatures.has('crypto')
+  ? require('node:crypto')
+  : null
+
+let warningEmitted = false
+
+/**
+ * @see https://websockets.spec.whatwg.org/#concept-websocket-establish
+ * @param {URL} url
+ * @param {string|string[]} protocols
+ * @param {import('./websocket').Handler} handler
+ * @param {Partial<import('../../../types/websocket').WebSocketInit>} options
+ */
+function establishWebSocketConnection (url, protocols, client, handler, options) {
+  // 1. Let requestURL be a copy of url, with its scheme set to "http", if url’s
+  //    scheme is "ws", and to "https" otherwise.
+  const requestURL = url
+
+  requestURL.protocol = url.protocol === 'ws:' ? 'http:' : 'https:'
+
+  // 2. Let request be a new request, whose URL is requestURL, client is client,
+  //    service-workers mode is "none", referrer is "no-referrer", mode is
+  //    "websocket", credentials mode is "include", cache mode is "no-store" ,
+  //    redirect mode is "error", and use-URL-credentials flag is set.
+  const request = makeRequest({
+    urlList: [requestURL],
+    client,
+    serviceWorkers: 'none',
+    referrer: 'no-referrer',
+    mode: 'websocket',
+    credentials: 'include',
+    cache: 'no-store',
+    redirect: 'error',
+    useURLCredentials: true
+  })
+
+  // Note: undici extension, allow setting custom headers.
+  if (options.headers) {
+    const headersList = getHeadersList(new Headers(options.headers))
+
+    request.headersList = headersList
+  }
+
+  // 3. Append (`Upgrade`, `websocket`) to request’s header list.
+  // 4. Append (`Connection`, `Upgrade`) to request’s header list.
+  // Note: both of these are handled by undici currently.
+  // https://github.com/nodejs/undici/blob/68c269c4144c446f3f1220951338daef4a6b5ec4/lib/client.js#L1397
+
+  // 5. Let keyValue be a nonce consisting of a randomly selected
+  //    16-byte value that has been forgiving-base64-encoded and
+  //    isomorphic encoded.
+  const keyValue = crypto.randomBytes(16).toString('base64')
+
+  // 6. Append (`Sec-WebSocket-Key`, keyValue) to request’s
+  //    header list.
+  request.headersList.append('sec-websocket-key', keyValue, true)
+
+  // 7. Append (`Sec-WebSocket-Version`, `13`) to request’s
+  //    header list.
+  request.headersList.append('sec-websocket-version', '13', true)
+
+  // 8. For each protocol in protocols, combine
+  //    (`Sec-WebSocket-Protocol`, protocol) in request’s header
+  //    list.
+  for (const protocol of protocols) {
+    request.headersList.append('sec-websocket-protocol', protocol, true)
+  }
+
+  // 9. Let permessageDeflate be a user-agent defined
+  //    "permessage-deflate" extension header value.
+  // https://github.com/mozilla/gecko-dev/blob/ce78234f5e653a5d3916813ff990f053510227bc/netwerk/protocol/websocket/WebSocketChannel.cpp#L2673
+  const permessageDeflate = 'permessage-deflate; client_max_window_bits'
+
+  // 10. Append (`Sec-WebSocket-Extensions`, permessageDeflate) to
+  //     request’s header list.
+  request.headersList.append('sec-websocket-extensions', permessageDeflate, true)
+
+  // 11. Fetch request with useParallelQueue set to true, and
+  //     processResponse given response being these steps:
+  const controller = fetching({
+    request,
+    useParallelQueue: true,
+    dispatcher: options.dispatcher,
+    processResponse (response) {
+      // 1. If response is a network error or its status is not 101,
+      //    fail the WebSocket connection.
+      // if (response.type === 'error' || ((response.socket?.session != null && response.status !== 200) && response.status !== 101)) {
+      if (response.type === 'error' || response.status !== 101) {
+        // The presence of a session property on the socket indicates HTTP2
+        // HTTP1
+        if (response.socket?.session == null) {
+          failWebsocketConnection(handler, 1002, 'Received network error or non-101 status code.', response.error)
+          return
+        }
+
+        // HTTP2
+        if (response.status !== 200) {
+          failWebsocketConnection(handler, 1002, 'Received network error or non-200 status code.', response.error)
+          return
+        }
+      }
+
+      if (warningEmitted === false && response.socket?.session != null) {
+        process.emitWarning('WebSocket over HTTP2 is experimental, and subject to change.', 'ExperimentalWarning')
+        warningEmitted = true
+      }
+
+      // 2. If protocols is not the empty list and extracting header
+      //    list values given `Sec-WebSocket-Protocol` and response’s
+      //    header list results in null, failure, or the empty byte
+      //    sequence, then fail the WebSocket connection.
+      if (protocols.length !== 0 && !response.headersList.get('Sec-WebSocket-Protocol')) {
+        failWebsocketConnection(handler, 1002, 'Server did not respond with sent protocols.')
+        return
+      }
+
+      // 3. Follow the requirements stated step 2 to step 6, inclusive,
+      //    of the last set of steps in section 4.1 of The WebSocket
+      //    Protocol to validate response. This either results in fail
+      //    the WebSocket connection or the WebSocket connection is
+      //    established.
+
+      // 2. If the response lacks an |Upgrade| header field or the |Upgrade|
+      //    header field contains a value that is not an ASCII case-
+      //    insensitive match for the value "websocket", the client MUST
+      //    _Fail the WebSocket Connection_.
+      //    For H2, no upgrade header is expected.
+      if (response.socket.session == null && response.headersList.get('Upgrade')?.toLowerCase() !== 'websocket') {
+        failWebsocketConnection(handler, 1002, 'Server did not set Upgrade header to "websocket".')
+        return
+      }
+
+      // 3. If the response lacks a |Connection| header field or the
+      //    |Connection| header field doesn't contain a token that is an
+      //    ASCII case-insensitive match for the value "Upgrade", the client
+      //    MUST _Fail the WebSocket Connection_.
+      //    For H2, no connection header is expected.
+      if (response.socket.session == null && response.headersList.get('Connection')?.toLowerCase() !== 'upgrade') {
+        failWebsocketConnection(handler, 1002, 'Server did not set Connection header to "upgrade".')
+        return
+      }
+
+      // 4. If the response lacks a |Sec-WebSocket-Accept| header field or
+      //    the |Sec-WebSocket-Accept| contains a value other than the
+      //    base64-encoded SHA-1 of the concatenation of the |Sec-WebSocket-
+      //    Key| (as a string, not base64-decoded) with the string "258EAFA5-
+      //    E914-47DA-95CA-C5AB0DC85B11" but ignoring any leading and
+      //    trailing whitespace, the client MUST _Fail the WebSocket
+      //    Connection_.
+      const secWSAccept = response.headersList.get('Sec-WebSocket-Accept')
+      const digest = crypto.hash('sha1', keyValue + uid, 'base64')
+      if (secWSAccept !== digest) {
+        failWebsocketConnection(handler, 1002, 'Incorrect hash received in Sec-WebSocket-Accept header.')
+        return
+      }
+
+      // 5. If the response includes a |Sec-WebSocket-Extensions| header
+      //    field and this header field indicates the use of an extension
+      //    that was not present in the client's handshake (the server has
+      //    indicated an extension not requested by the client), the client
+      //    MUST _Fail the WebSocket Connection_.  (The parsing of this
+      //    header field to determine which extensions are requested is
+      //    discussed in Section 9.1.)
+      const secExtension = response.headersList.get('Sec-WebSocket-Extensions')
+      let extensions
+
+      if (secExtension !== null) {
+        extensions = parseExtensions(secExtension)
+
+        if (!extensions.has('permessage-deflate')) {
+          failWebsocketConnection(handler, 1002, 'Sec-WebSocket-Extensions header does not match.')
+          return
+        }
+      }
+
+      // 6. If the response includes a |Sec-WebSocket-Protocol| header field
+      //    and this header field indicates the use of a subprotocol that was
+      //    not present in the client's handshake (the server has indicated a
+      //    subprotocol not requested by the client), the client MUST _Fail
+      //    the WebSocket Connection_.
+      const secProtocol = response.headersList.get('Sec-WebSocket-Protocol')
+
+      if (secProtocol !== null) {
+        const requestProtocols = getDecodeSplit('sec-websocket-protocol', request.headersList)
+
+        // The client can request that the server use a specific subprotocol by
+        // including the |Sec-WebSocket-Protocol| field in its handshake.  If it
+        // is specified, the server needs to include the same field and one of
+        // the selected subprotocol values in its response for the connection to
+        // be established.
+        if (!requestProtocols.includes(secProtocol)) {
+          failWebsocketConnection(handler, 1002, 'Protocol was not set in the opening handshake.')
+          return
+        }
+      }
+
+      response.socket.on('data', handler.onSocketData)
+      response.socket.on('close', handler.onSocketClose)
+      response.socket.on('error', handler.onSocketError)
+
+      handler.wasEverConnected = true
+      handler.onConnectionEstablished(response, extensions)
+    }
+  })
+
+  return controller
+}
+
+/**
+ * @see https://whatpr.org/websockets/48.html#close-the-websocket
+ * @param {import('./websocket').Handler} object
+ * @param {number} [code=null]
+ * @param {string} [reason='']
+ */
+function closeWebSocketConnection (object, code, reason, validate = false) {
+  // 1. If code was not supplied, let code be null.
+  code ??= null
+
+  // 2. If reason was not supplied, let reason be the empty string.
+  reason ??= ''
+
+  // 3. Validate close code and reason with code and reason.
+  if (validate) validateCloseCodeAndReason(code, reason)
+
+  // 4. Run the first matching steps from the following list:
+  //     - If object’s ready state is CLOSING (2) or CLOSED (3)
+  //     - If the WebSocket connection is not yet established [WSP]
+  //     - If the WebSocket closing handshake has not yet been started [WSP]
+  //     - Otherwise
+  if (isClosed(object.readyState) || isClosing(object.readyState)) {
+    // Do nothing.
+  } else if (!isEstablished(object.readyState)) {
+    // Fail the WebSocket connection and set object’s ready state to CLOSING (2). [WSP]
+    failWebsocketConnection(object)
+    object.readyState = states.CLOSING
+  } else if (!object.closeState.has(sentCloseFrameState.SENT) && !object.closeState.has(sentCloseFrameState.RECEIVED)) {
+    // Upon either sending or receiving a Close control frame, it is said
+    // that _The WebSocket Closing Handshake is Started_ and that the
+    // WebSocket connection is in the CLOSING state.
+
+    const frame = new WebsocketFrameSend()
+
+    // If neither code nor reason is present, the WebSocket Close
+    // message must not have a body.
+
+    // If code is present, then the status code to use in the
+    // WebSocket Close message must be the integer given by code.
+    // If code is null and reason is the empty string, the WebSocket Close frame must not have a body.
+    // If reason is non-empty but code is null, then set code to 1000 ("Normal Closure").
+    if (reason.length !== 0 && code === null) {
+      code = 1000
+    }
+
+    // If code is set, then the status code to use in the WebSocket Close frame must be the integer given by code.
+    assert(code === null || Number.isInteger(code))
+
+    if (code === null && reason.length === 0) {
+      frame.frameData = emptyBuffer
+    } else if (code !== null && reason === null) {
+      frame.frameData = Buffer.allocUnsafe(2)
+      frame.frameData.writeUInt16BE(code, 0)
+    } else if (code !== null && reason !== null) {
+      // If reason is also present, then reasonBytes must be
+      // provided in the Close message after the status code.
+      frame.frameData = Buffer.allocUnsafe(2 + Buffer.byteLength(reason))
+      frame.frameData.writeUInt16BE(code, 0)
+      // the body MAY contain UTF-8-encoded data with value /reason/
+      frame.frameData.write(reason, 2, 'utf-8')
+    } else {
+      frame.frameData = emptyBuffer
+    }
+
+    object.socket.write(frame.createFrame(opcodes.CLOSE))
+
+    object.closeState.add(sentCloseFrameState.SENT)
+
+    // Upon either sending or receiving a Close control frame, it is said
+    // that _The WebSocket Closing Handshake is Started_ and that the
+    // WebSocket connection is in the CLOSING state.
+    object.readyState = states.CLOSING
+  } else {
+    // Set object’s ready state to CLOSING (2).
+    object.readyState = states.CLOSING
+  }
+}
+
+/**
+ * @param {import('./websocket').Handler} handler
+ * @param {number} code
+ * @param {string|undefined} reason
+ * @param {unknown} cause
+ * @returns {void}
+ */
+function failWebsocketConnection (handler, code, reason, cause) {
+  // If _The WebSocket Connection is Established_ prior to the point where
+  // the endpoint is required to _Fail the WebSocket Connection_, the
+  // endpoint SHOULD send a Close frame with an appropriate status code
+  // (Section 7.4) before proceeding to _Close the WebSocket Connection_.
+  if (isEstablished(handler.readyState)) {
+    closeWebSocketConnection(handler, code, reason, false)
+  }
+
+  handler.controller.abort()
+
+  if (isConnecting(handler.readyState)) {
+    // If the connection was not established, we must still emit an 'error' and 'close' events
+    handler.onSocketClose()
+  } else if (handler.socket?.destroyed === false) {
+    handler.socket.destroy()
+  }
+}
+
+module.exports = {
+  establishWebSocketConnection,
+  failWebsocketConnection,
+  closeWebSocketConnection
+}