denoland-deno/ext/node/polyfills/_http_outgoing.ts

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// Copyright Joyent and Node contributors. All rights reserved. MIT license.

// TODO(petamoriken): enable prefer-primordials for node polyfills
// deno-lint-ignore-file prefer-primordials

import { getDefaultHighWaterMark } from "ext:deno_node/internal/streams/state.mjs";
import assert from "ext:deno_node/internal/assert.mjs";
import EE from "node:events";
import { Stream } from "node:stream";
import { deprecate } from "node:util";
import type { Socket } from "node:net";
import {
  kNeedDrain,
  kOutHeaders,
  utcDate,
} from "ext:deno_node/internal/http.ts";
import { notImplemented } from "ext:deno_node/_utils.ts";
import { Buffer } from "node:buffer";
import {
  _checkInvalidHeaderChar as checkInvalidHeaderChar,
  _checkIsHttpToken as checkIsHttpToken,
  chunkExpression as RE_TE_CHUNKED,
} from "ext:deno_node/_http_common.ts";
import {
  defaultTriggerAsyncIdScope,
  symbols,
} from "ext:deno_node/internal/async_hooks.ts";
const { async_id_symbol } = symbols;
import {
  ERR_HTTP_HEADERS_SENT,
  ERR_HTTP_INVALID_HEADER_VALUE,
  ERR_HTTP_TRAILER_INVALID,
  ERR_INVALID_ARG_TYPE,
  // ERR_INVALID_ARG_VALUE,
  ERR_INVALID_CHAR,
  ERR_INVALID_HTTP_TOKEN,
  ERR_METHOD_NOT_IMPLEMENTED,
  // ERR_STREAM_ALREADY_FINISHED,
  ERR_STREAM_CANNOT_PIPE,
  // ERR_STREAM_DESTROYED,
  ERR_STREAM_NULL_VALUES,
  // ERR_STREAM_WRITE_AFTER_END,
  hideStackFrames,
} from "ext:deno_node/internal/errors.ts";
import { validateString } from "ext:deno_node/internal/validators.mjs";
import { isUint8Array } from "ext:deno_node/internal/util/types.ts";
// import { kStreamBaseField } from "ext:deno_node/internal_binding/stream_wrap.ts";

import { debuglog } from "ext:deno_node/internal/util/debuglog.ts";
let debug = debuglog("http", (fn) => {
  debug = fn;
});

const HIGH_WATER_MARK = getDefaultHighWaterMark();

const kCorked = Symbol("corked");

const nop = () => {};

const RE_CONN_CLOSE = /(?:^|\W)close(?:$|\W)/i;

export class OutgoingMessage extends Stream {
  // deno-lint-ignore no-explicit-any
  outputData: any[];
  outputSize: number;
  writable: boolean;
  destroyed: boolean;

  _last: boolean;
  chunkedEncoding: boolean;
  shouldKeepAlive: boolean;
  maxRequestsOnConnectionReached: boolean;
  _defaultKeepAlive: boolean;
  useChunkedEncodingByDefault: boolean;
  sendDate: boolean;
  _removedConnection: boolean;
  _removedContLen: boolean;
  _removedTE: boolean;

  _contentLength: number | null;
  _hasBody: boolean;
  _trailer: string;
  [kNeedDrain]: boolean;

  finished: boolean;
  _headerSent: boolean;
  [kCorked]: number;
  _closed: boolean;

  // TODO(crowlKats): use it
  socket: null;
  _header: string | null;
  [kOutHeaders]: null | Record<string, [string, string]>;

  _keepAliveTimeout: number;
  _onPendingData: () => void;

  constructor() {
    super();

    // Queue that holds all currently pending data, until the response will be
    // assigned to the socket (until it will its turn in the HTTP pipeline).
    this.outputData = [];

    // `outputSize` is an approximate measure of how much data is queued on this
    // response. `_onPendingData` will be invoked to update similar global
    // per-connection counter. That counter will be used to pause/unpause the
    // TCP socket and HTTP Parser and thus handle the backpressure.
    this.outputSize = 0;

    this.writable = true;
    this.destroyed = false;

    this._last = false;
    this.chunkedEncoding = false;
    this.shouldKeepAlive = true;
    this.maxRequestsOnConnectionReached = false;
    this._defaultKeepAlive = true;
    this.useChunkedEncodingByDefault = true;
    this.sendDate = false;
    this._removedConnection = false;
    this._removedContLen = false;
    this._removedTE = false;

    this._contentLength = null;
    this._hasBody = true;
    this._trailer = "";
    this[kNeedDrain] = false;

    this.finished = false;
    this._headerSent = false;
    this[kCorked] = 0;
    this._closed = false;

    this.socket = null;
    this._header = null;
    this[kOutHeaders] = null;

    this._keepAliveTimeout = 0;

    this._onPendingData = nop;
  }

  get writableFinished() {
    return (
      this.finished &&
      this.outputSize === 0 &&
      (!this.socket || this.socket.writableLength === 0)
    );
  }

  get writableObjectMode() {
    return false;
  }

  get writableLength() {
    return this.outputSize + (this.socket ? this.socket.writableLength : 0);
  }

  get writableHighWaterMark() {
    return this.socket ? this.socket.writableHighWaterMark : HIGH_WATER_MARK;
  }

  get writableCorked() {
    const corked = this.socket ? this.socket.writableCorked : 0;
    return corked + this[kCorked];
  }

  get connection() {
    return this.socket;
  }

  set connection(val) {
    this.socket = val;
  }

  get writableEnded() {
    return this.finished;
  }

  get writableNeedDrain() {
    return !this.destroyed && !this.finished && this[kNeedDrain];
  }

  cork() {
    if (this.socket) {
      this.socket.cork();
    } else {
      this[kCorked]++;
    }
  }

  uncork() {
    if (this.socket) {
      this.socket.uncork();
    } else if (this[kCorked]) {
      this[kCorked]--;
    }
  }

  setTimeout(msecs: number, callback?: (...args: unknown[]) => void) {
    if (callback) {
      this.on("timeout", callback);
    }

    if (!this.socket) {
      // deno-lint-ignore no-explicit-any
      this.once("socket", function socketSetTimeoutOnConnect(socket: any) {
        socket.setTimeout(msecs);
      });
    } else {
      this.socket.setTimeout(msecs);
    }
    return this;
  }

  // It's possible that the socket will be destroyed, and removed from
  // any messages, before ever calling this.  In that case, just skip
  // it, since something else is destroying this connection anyway.
  destroy(error: unknown) {
    if (this.destroyed) {
      return this;
    }
    this.destroyed = true;

    if (this.socket) {
      this.socket.destroy(error);
    } else {
      // deno-lint-ignore no-explicit-any
      this.once("socket", function socketDestroyOnConnect(socket: any) {
        socket.destroy(error);
      });
    }

    return this;
  }

  setHeader(name: string, value: string) {
    if (this._header) {
      throw new ERR_HTTP_HEADERS_SENT("set");
    }
    validateHeaderName(name);
    validateHeaderValue(name, value);

    let headers = this[kOutHeaders];
    if (headers === null) {
      this[kOutHeaders] = headers = Object.create(null);
    }

    name = name.toString();
    headers[name.toLowerCase()] = [name, String(value)];
    return this;
  }

  appendHeader(name, value) {
    if (this._header) {
      throw new ERR_HTTP_HEADERS_SENT("append");
    }
    validateHeaderName(name);
    validateHeaderValue(name, value);

    name = name.toString();

    const field = name.toLowerCase();
    const headers = this[kOutHeaders];
    if (headers === null || !headers[field]) {
      return this.setHeader(name, value);
    }

    // Prepare the field for appending, if required
    if (!Array.isArray(headers[field][1])) {
      headers[field][1] = [headers[field][1]];
    }

    const existingValues = headers[field][1];
    if (Array.isArray(value)) {
      for (let i = 0, length = value.length; i < length; i++) {
        existingValues.push(value[i].toString());
      }
    } else {
      existingValues.push(value.toString());
    }

    return this;
  }

  // Returns a shallow copy of the current outgoing headers.
  getHeaders() {
    const headers = this[kOutHeaders];
    const ret = Object.create(null);
    if (headers) {
      const keys = Object.keys(headers);
      // Retain for(;;) loop for performance reasons
      // Refs: https://github.com/nodejs/node/pull/30958
      for (let i = 0; i < keys.length; ++i) {
        const key = keys[i];
        const val = headers[key][1];
        ret[key] = val;
      }
    }
    return ret;
  }

  hasHeader(name: string) {
    validateString(name, "name");
    return this[kOutHeaders] !== null &&
      !!this[kOutHeaders][name.toLowerCase()];
  }

  removeHeader(name: string) {
    validateString(name, "name");

    if (this._header) {
      throw new ERR_HTTP_HEADERS_SENT("remove");
    }

    const key = name.toLowerCase();

    switch (key) {
      case "connection":
        this._removedConnection = true;
        break;
      case "content-length":
        this._removedContLen = true;
        break;
      case "transfer-encoding":
        this._removedTE = true;
        break;
      case "date":
        this.sendDate = false;
        break;
    }

    if (this[kOutHeaders] !== null) {
      delete this[kOutHeaders][key];
    }
  }

  getHeader(name: string) {
    validateString(name, "name");

    const headers = this[kOutHeaders];
    if (headers === null) {
      return;
    }

    const entry = headers[name.toLowerCase()];
    return entry && entry[1];
  }

  // Returns an array of the names of the current outgoing headers.
  getHeaderNames() {
    return this[kOutHeaders] !== null ? Object.keys(this[kOutHeaders]) : [];
  }

  // Returns an array of the names of the current outgoing raw headers.
  getRawHeaderNames() {
    const headersMap = this[kOutHeaders];
    if (headersMap === null) return [];

    const values = Object.values(headersMap);
    const headers = Array(values.length);
    // Retain for(;;) loop for performance reasons
    // Refs: https://github.com/nodejs/node/pull/30958
    for (let i = 0, l = values.length; i < l; i++) {
      // deno-lint-ignore no-explicit-any
      headers[i] = (values as any)[i][0];
    }

    return headers;
  }

  write(
    chunk: string | Uint8Array | Buffer,
    encoding: string | null,
    callback: () => void,
  ): boolean {
    if (typeof encoding === "function") {
      callback = encoding;
      encoding = null;
    }
    return this.write_(chunk, encoding, callback, false);
  }

  write_(
    chunk: string | Uint8Array | Buffer,
    encoding: string | null,
    callback: () => void,
    fromEnd: boolean,
  ): boolean {
    // Ignore lint to keep the code as similar to Nodejs as possible
    // deno-lint-ignore no-this-alias
    const msg = this;

    if (chunk === null) {
      throw new ERR_STREAM_NULL_VALUES();
    } else if (typeof chunk !== "string" && !isUint8Array(chunk)) {
      throw new ERR_INVALID_ARG_TYPE(
        "chunk",
        ["string", "Buffer", "Uint8Array"],
        chunk,
      );
    }

    let len: number;

    if (!msg._header) {
      if (fromEnd) {
        len ??= typeof chunk === "string"
          ? Buffer.byteLength(chunk, encoding)
          : chunk.byteLength;
        msg._contentLength = len;
      }
      msg._implicitHeader();
    }

    return msg._send(chunk, encoding, callback);
  }

  // deno-lint-ignore no-explicit-any
  addTrailers(_headers: any) {
    // TODO(crowlKats): finish it
    notImplemented("OutgoingMessage.addTrailers");
  }

  // deno-lint-ignore no-explicit-any
  end(_chunk: any, _encoding: any, _callback: any) {
    notImplemented("OutgoingMessage.end");
  }

  flushHeaders() {
    if (!this._header) {
      this._implicitHeader();
    }

    // Force-flush the headers.
    this._send("");
  }

  pipe() {
    // OutgoingMessage should be write-only. Piping from it is disabled.
    this.emit("error", new ERR_STREAM_CANNOT_PIPE());
  }

  _implicitHeader() {
    throw new ERR_METHOD_NOT_IMPLEMENTED("_implicitHeader()");
  }

  _finish() {
    assert(this.socket);
    this.emit("prefinish");
  }

  // This logic is probably a bit confusing. Let me explain a bit:
  //
  // In both HTTP servers and clients it is possible to queue up several
  // outgoing messages. This is easiest to imagine in the case of a client.
  // Take the following situation:
  //
  //    req1 = client.request('GET', '/');
  //    req2 = client.request('POST', '/');
  //
  // When the user does
  //
  //   req2.write('hello world\n');
  //
  // it's possible that the first request has not been completely flushed to
  // the socket yet. Thus the outgoing messages need to be prepared to queue
  // up data internally before sending it on further to the socket's queue.
  //
  // This function, outgoingFlush(), is called by both the Server and Client
  // to attempt to flush any pending messages out to the socket.
  _flush() {
    const socket = this.socket;

    if (socket && socket.writable) {
      // There might be remaining data in this.output; write it out
      const ret = this._flushOutput(socket);

      if (this.finished) {
        // This is a queue to the server or client to bring in the next this.
        this._finish();
      } else if (ret && this[kNeedDrain]) {
        this[kNeedDrain] = false;
        this.emit("drain");
      }
    }
  }

  _flushOutput(socket: Socket) {
    while (this[kCorked]) {
      this[kCorked]--;
      socket.cork();
    }

    const outputLength = this.outputData.length;
    if (outputLength <= 0) {
      return undefined;
    }

    const outputData = this.outputData;
    socket.cork();
    let ret;
    // Retain for(;;) loop for performance reasons
    // Refs: https://github.com/nodejs/node/pull/30958
    for (let i = 0; i < outputLength; i++) {
      const { data, encoding, callback } = outputData[i];
      ret = socket.write(data, encoding, callback);
    }
    socket.uncork();

    this.outputData = [];
    this._onPendingData(-this.outputSize);
    this.outputSize = 0;

    return ret;
  }

  // deno-lint-ignore no-explicit-any
  _send(data: any, encoding?: string | null, callback?: () => void) {
    if (!this._headerSent && this._header !== null) {
      this._writeHeader();
      this._headerSent = true;
    }
    return this._writeRaw(data, encoding, callback);
  }

  _writeHeader() {
    throw new ERR_METHOD_NOT_IMPLEMENTED("_writeHeader()");
  }

  _writeRaw(
    // deno-lint-ignore no-explicit-any
    data: any,
    encoding?: string | null,
    callback?: () => void,
  ) {
    if (typeof data === "string") {
      data = Buffer.from(data, encoding);
    }
    if (data instanceof Buffer) {
      data = new Uint8Array(data.buffer);
    }
    if (data.buffer.byteLength > 0) {
      this._bodyWriter.write(data).then(() => {
        callback?.();
        this.emit("drain");
      }).catch((e) => {
        this._requestSendError = e;
      });
    }
    return false;
  }

  _renderHeaders() {
    if (this._header) {
      throw new ERR_HTTP_HEADERS_SENT("render");
    }

    const headersMap = this[kOutHeaders];
    // deno-lint-ignore no-explicit-any
    const headers: any = {};

    if (headersMap !== null) {
      const keys = Object.keys(headersMap);
      // Retain for(;;) loop for performance reasons
      // Refs: https://github.com/nodejs/node/pull/30958
      for (let i = 0, l = keys.length; i < l; i++) {
        const key = keys[i];
        headers[headersMap[key][0]] = headersMap[key][1];
      }
    }
    return headers;
  }

  _storeHeader(firstLine: string, _headers: never) {
    // firstLine in the case of request is: 'GET /index.html HTTP/1.1\r\n'
    // in the case of response it is: 'HTTP/1.1 200 OK\r\n'
    const state = {
      connection: false,
      contLen: false,
      te: false,
      date: false,
      expect: false,
      trailer: false,
      header: firstLine,
    };

    const headers = this[kOutHeaders];
    if (headers) {
      // headers is null-prototype object, so ignore the guard lint
      // deno-lint-ignore guard-for-in
      for (const key in headers) {
        const entry = headers[key];
        this._matchHeader(state, entry[0], entry[1]);
      }
    }

    // Date header
    if (this.sendDate && !state.date) {
      this.setHeader("Date", utcDate());
    }

    // Force the connection to close when the response is a 204 No Content or
    // a 304 Not Modified and the user has set a "Transfer-Encoding: chunked"
    // header.
    //
    // RFC 2616 mandates that 204 and 304 responses MUST NOT have a body but
    // node.js used to send out a zero chunk anyway to accommodate clients
    // that don't have special handling for those responses.
    //
    // It was pointed out that this might confuse reverse proxies to the point
    // of creating security liabilities, so suppress the zero chunk and force
    // the connection to close.
    if (
      this.chunkedEncoding && (this.statusCode === 204 ||
        this.statusCode === 304)
    ) {
      debug(
        this.statusCode + " response should not use chunked encoding," +
          " closing connection.",
      );
      this.chunkedEncoding = false;
      this.shouldKeepAlive = false;
    }

    // TODO(osddeitf): this depends on agent and underlying socket
    // keep-alive logic
    // if (this._removedConnection) {
    //   this._last = true;
    //   this.shouldKeepAlive = false;
    // } else if (!state.connection) {
    //   const shouldSendKeepAlive = this.shouldKeepAlive &&
    //       (state.contLen || this.useChunkedEncodingByDefault || this.agent);
    //   if (shouldSendKeepAlive && this.maxRequestsOnConnectionReached) {
    //     this.setHeader('Connection', 'close');
    //   } else if (shouldSendKeepAlive) {
    //     this.setHeader('Connection', 'keep-alive');
    //     if (this._keepAliveTimeout && this._defaultKeepAlive) {
    //       const timeoutSeconds = Math.floor(this._keepAliveTimeout / 1000);
    //       let max = '';
    //       if (~~this._maxRequestsPerSocket > 0) {
    //         max = `, max=${this._maxRequestsPerSocket}`;
    //       }
    //       this.setHeader('Keep-Alive', `timeout=${timeoutSeconds}${max}`);
    //     }
    //   } else {
    //     this._last = true;
    //     this.setHeader('Connection', 'close');
    //   }
    // }

    if (!state.contLen && !state.te) {
      if (!this._hasBody) {
        // Make sure we don't end the 0\r\n\r\n at the end of the message.
        this.chunkedEncoding = false;
      } else if (!this.useChunkedEncodingByDefault) {
        this._last = true;
      } else if (
        !state.trailer &&
        !this._removedContLen &&
        typeof this._contentLength === "number"
      ) {
        this.setHeader("Content-Length", this._contentLength);
      } else if (!this._removedTE) {
        this.setHeader("Transfer-Encoding", "chunked");
        this.chunkedEncoding = true;
      } else {
        // We should only be able to get here if both Content-Length and
        // Transfer-Encoding are removed by the user.
        // See: test/parallel/test-http-remove-header-stays-removed.js
        debug("Both Content-Length and Transfer-Encoding are removed");
      }
    }

    // Test non-chunked message does not have trailer header set,
    // message will be terminated by the first empty line after the
    // header fields, regardless of the header fields present in the
    // message, and thus cannot contain a message body or 'trailers'.
    if (this.chunkedEncoding !== true && state.trailer) {
      throw new ERR_HTTP_TRAILER_INVALID();
    }

    const { header } = state;
    this._header = header + "\r\n";
    this._headerSent = false;

    // Wait until the first body chunk, or close(), is sent to flush,
    // UNLESS we're sending Expect: 100-continue.
    if (state.expect) this._send("");
  }

  _matchHeader(
    // deno-lint-ignore no-explicit-any
    state: any,
    field: string,
    // deno-lint-ignore no-explicit-any
    value: any,
  ) {
    // Ignore lint to keep the code as similar to Nodejs as possible
    // deno-lint-ignore no-this-alias
    const self = this;
    if (field.length < 4 || field.length > 17) {
      return;
    }
    field = field.toLowerCase();
    switch (field) {
      case "connection":
        state.connection = true;
        self._removedConnection = false;
        if (RE_CONN_CLOSE.exec(value) !== null) {
          self._last = true;
        } else {
          self.shouldKeepAlive = true;
        }
        break;
      case "transfer-encoding":
        state.te = true;
        self._removedTE = false;
        if (RE_TE_CHUNKED.exec(value) !== null) {
          self.chunkedEncoding = true;
        }
        break;
      case "content-length":
        state.contLen = true;
        self._contentLength = value;
        self._removedContLen = false;
        break;
      case "date":
      case "expect":
      case "trailer":
        state[field] = true;
        break;
      case "keep-alive":
        self._defaultKeepAlive = false;
        break;
    }
  }

  // deno-lint-ignore no-explicit-any
  [EE.captureRejectionSymbol](err: any, _event: any) {
    this.destroy(err);
  }
}

Object.defineProperty(OutgoingMessage.prototype, "_headers", {
  get: deprecate(
    // deno-lint-ignore no-explicit-any
    function (this: any) {
      return this.getHeaders();
    },
    "OutgoingMessage.prototype._headers is deprecated",
    "DEP0066",
  ),
  set: deprecate(
    // deno-lint-ignore no-explicit-any
    function (this: any, val: any) {
      if (val == null) {
        this[kOutHeaders] = null;
      } else if (typeof val === "object") {
        const headers = this[kOutHeaders] = Object.create(null);
        const keys = Object.keys(val);
        // Retain for(;;) loop for performance reasons
        // Refs: https://github.com/nodejs/node/pull/30958
        for (let i = 0; i < keys.length; ++i) {
          const name = keys[i];
          headers[name.toLowerCase()] = [name, val[name]];
        }
      }
    },
    "OutgoingMessage.prototype._headers is deprecated",
    "DEP0066",
  ),
});

Object.defineProperty(OutgoingMessage.prototype, "_headerNames", {
  get: deprecate(
    // deno-lint-ignore no-explicit-any
    function (this: any) {
      const headers = this[kOutHeaders];
      if (headers !== null) {
        const out = Object.create(null);
        const keys = Object.keys(headers);
        // Retain for(;;) loop for performance reasons
        // Refs: https://github.com/nodejs/node/pull/30958
        for (let i = 0; i < keys.length; ++i) {
          const key = keys[i];
          const val = headers[key][0];
          out[key] = val;
        }
        return out;
      }
      return null;
    },
    "OutgoingMessage.prototype._headerNames is deprecated",
    "DEP0066",
  ),
  set: deprecate(
    // deno-lint-ignore no-explicit-any
    function (this: any, val: any) {
      if (typeof val === "object" && val !== null) {
        const headers = this[kOutHeaders];
        if (!headers) {
          return;
        }
        const keys = Object.keys(val);
        // Retain for(;;) loop for performance reasons
        // Refs: https://github.com/nodejs/node/pull/30958
        for (let i = 0; i < keys.length; ++i) {
          const header = headers[keys[i]];
          if (header) {
            header[0] = val[keys[i]];
          }
        }
      }
    },
    "OutgoingMessage.prototype._headerNames is deprecated",
    "DEP0066",
  ),
});

export const validateHeaderName = hideStackFrames((name) => {
  if (typeof name !== "string" || !name || !checkIsHttpToken(name)) {
    throw new ERR_INVALID_HTTP_TOKEN("Header name", name);
  }
});

export const validateHeaderValue = hideStackFrames((name, value) => {
  if (value === undefined) {
    throw new ERR_HTTP_INVALID_HEADER_VALUE(value, name);
  }
  if (checkInvalidHeaderChar(value)) {
    debug('Header "%s" contains invalid characters', name);
    throw new ERR_INVALID_CHAR("header content", name);
  }
});

export function parseUniqueHeadersOption(headers) {
  if (!Array.isArray(headers)) {
    return null;
  }

  const unique = new Set();
  const l = headers.length;
  for (let i = 0; i < l; i++) {
    unique.add(headers[i].toLowerCasee());
  }

  return unique;
}

Object.defineProperty(OutgoingMessage.prototype, "headersSent", {
  configurable: true,
  enumerable: true,
  get: function () {
    return !!this._header;
  },
});

// TODO(bartlomieju): use it
// deno-lint-ignore camelcase
const _crlf_buf = Buffer.from("\r\n");

// TODO(bartlomieju): use it
// deno-lint-ignore no-explicit-any
function _onError(msg: any, err: any, callback: any) {
  const triggerAsyncId = msg.socket ? msg.socket[async_id_symbol] : undefined;
  defaultTriggerAsyncIdScope(
    triggerAsyncId,
    // deno-lint-ignore no-explicit-any
    (globalThis as any).process.nextTick,
    emitErrorNt,
    msg,
    err,
    callback,
  );
}

// deno-lint-ignore no-explicit-any
function emitErrorNt(msg: any, err: any, callback: any) {
  callback(err);
  if (typeof msg.emit === "function" && !msg._closed) {
    msg.emit("error", err);
  }
}

// TODO(bartlomieju): use it
function _write_(
  // deno-lint-ignore no-explicit-any
  _msg: any,
  // deno-lint-ignore no-explicit-any
  _chunk: any,
  _encoding: string | null,
  // deno-lint-ignore no-explicit-any
  _callback: any,
  // deno-lint-ignore no-explicit-any
  _fromEnd: any,
) {
  // TODO(crowlKats): finish
}

// TODO(bartlomieju): use it
// deno-lint-ignore no-explicit-any
function _connectionCorkNT(conn: any) {
  conn.uncork();
}

// TODO(bartlomieju): use it
// deno-lint-ignore no-explicit-any
function _onFinish(outmsg: any) {
  if (outmsg && outmsg.socket && outmsg.socket._hadError) return;
  outmsg.emit("finish");
}

export default {
  validateHeaderName,
  validateHeaderValue,
  parseUniqueHeadersOption,
  OutgoingMessage,
};