// Copyright Joyent, Inc. and other Node contributors.

//

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

//

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

const {

Array,

ArrayIsArray,

MathFloor,

ObjectDefineProperty,

ObjectHasOwn,

ObjectKeys,

ObjectSetPrototypeOf,

ObjectValues,

SafeSet,

Symbol,

} = primordials;

const { getDefaultHighWaterMark } = require('internal/streams/state');

const assert = require('internal/assert');

const EE = require('events');

const Stream = require('stream');

const { kOutHeaders, utcDate, kNeedDrain } = require('internal/http');

const { Buffer } = require('buffer');

const {

_checkIsHttpToken: checkIsHttpToken,

_checkInvalidHeaderChar: checkInvalidHeaderChar,

chunkExpression: RE_TE_CHUNKED,

} = require('_http_common');

const {

defaultTriggerAsyncIdScope,

symbols: { async_id_symbol },

} = require('internal/async_hooks');

const {

codes: {

ERR_HTTP_BODY_NOT_ALLOWED,

ERR_HTTP_CONTENT_LENGTH_MISMATCH,

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,

} = require('internal/errors');

const { validateString } = require('internal/validators');

const { assignFunctionName } = require('internal/util');

const { isUint8Array } = require('internal/util/types');

let debug = require('internal/util/debuglog').debuglog('http', (fn) => {

debug = fn;

});

const kCorked = Symbol('corked');

const kSocket = Symbol('kSocket');

const kChunkedBuffer = Symbol('kChunkedBuffer');

const kChunkedLength = Symbol('kChunkedLength');

const kUniqueHeaders = Symbol('kUniqueHeaders');

const kBytesWritten = Symbol('kBytesWritten');

const kErrored = Symbol('errored');

const kHighWaterMark = Symbol('kHighWaterMark');

const kRejectNonStandardBodyWrites = Symbol('kRejectNonStandardBodyWrites');

const nop = () => {};

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

// isCookieField performs a case-insensitive comparison of a provided string

// against the word "cookie." As of V8 6.6 this is faster than handrolling or

// using a case-insensitive RegExp.

function isCookieField(s) {

return s.length === 6 && s.toLowerCase() === 'cookie';

}

function isContentDispositionField(s) {

return s.length === 19 && s.toLowerCase() === 'content-disposition';

}

function OutgoingMessage(options) {

Stream.call(this);

// 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.strictContentLength = false;

this[kBytesWritten] = 0;

this._contentLength = null;

this._hasBody = true;

this._trailer = '';

this[kNeedDrain] = false;

this.finished = false;

this._headerSent = false;

this[kCorked] = 0;

this[kChunkedBuffer] = [];

this[kChunkedLength] = 0;

this._closed = false;

this[kSocket] = null;

this._header = null;

this[kOutHeaders] = null;

this._keepAliveTimeout = 0;

this._onPendingData = nop;

this[kErrored] = null;

this[kHighWaterMark] = options?.highWaterMark ?? getDefaultHighWaterMark();

this[kRejectNonStandardBodyWrites] = options?.rejectNonStandardBodyWrites ?? false;

}

ObjectSetPrototypeOf(OutgoingMessage.prototype, Stream.prototype);

ObjectSetPrototypeOf(OutgoingMessage, Stream);

ObjectDefineProperty(OutgoingMessage.prototype, 'errored', {

__proto__: null,

get() {

return this[kErrored];

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'closed', {

__proto__: null,

get() {

return this._closed;

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'writableFinished', {

__proto__: null,

get() {

return (

this.finished &&

this.outputSize === 0 &&

(!this[kSocket] || this[kSocket].writableLength === 0)

);

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'writableObjectMode', {

__proto__: null,

get() {

return false;

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'writableLength', {

__proto__: null,

get() {

return this.outputSize + this[kChunkedLength] + (this[kSocket] ? this[kSocket].writableLength : 0);

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'writableHighWaterMark', {

__proto__: null,

get() {

return this[kSocket] ? this[kSocket].writableHighWaterMark : this[kHighWaterMark];

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'writableCorked', {

__proto__: null,

get() {

return this[kCorked];

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'connection', {

__proto__: null,

get: function() {

return this[kSocket];

},

set: function(val) {

this.socket = val;

},

});

ObjectDefineProperty(OutgoingMessage.prototype, 'socket', {

__proto__: null,

get: function() {

return this[kSocket];

},

set: function(val) {

for (let n = 0; n < this[kCorked]; n++) {

val?.cork();

this[kSocket]?.uncork();

}

this[kSocket] = val;

},

});

OutgoingMessage.prototype._renderHeaders = function _renderHeaders() {

if (this._header) {

throw new ERR_HTTP_HEADERS_SENT('render');

}

const headersMap = this[kOutHeaders];

const headers = {};

if (headersMap !== null) {

const keys = ObjectKeys(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;

};

OutgoingMessage.prototype.cork = function cork() {

this[kCorked]++;

if (this[kSocket]) {

this[kSocket].cork();

}

};

OutgoingMessage.prototype.uncork = function uncork() {

this[kCorked]--;

if (this[kSocket]) {

this[kSocket].uncork();

}

if (this[kCorked] || this[kChunkedBuffer].length === 0) {

return;

}

const len = this[kChunkedLength];

const buf = this[kChunkedBuffer];

assert(this.chunkedEncoding);

let callbacks;

this._send(len.toString(16), 'latin1', null);

this._send(crlf_buf, null, null);

for (let n = 0; n < buf.length; n += 3) {

this._send(buf[n + 0], buf[n + 1], null);

if (buf[n + 2]) {

callbacks ??= [];

callbacks.push(buf[n + 2]);

}

}

this._send(crlf_buf, null, callbacks.length ? (err) => {

for (const callback of callbacks) {

callback(err);

}

} : null);

this[kChunkedBuffer].length = 0;

this[kChunkedLength] = 0;

};

OutgoingMessage.prototype.setTimeout = function setTimeout(msecs, callback) {

if (callback) {

this.on('timeout', callback);

}

if (!this[kSocket]) {

this.once('socket', function socketSetTimeoutOnConnect(socket) {

socket.setTimeout(msecs);

});

} else {

this[kSocket].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.

OutgoingMessage.prototype.destroy = function destroy(error) {

if (this.destroyed) {

return this;

}

this.destroyed = true;

this[kErrored] = error;

if (this[kSocket]) {

this[kSocket].destroy(error);

} else {

this.once('socket', function socketDestroyOnConnect(socket) {

socket.destroy(error);

});

}

return this;

};

// This abstract either writing directly to the socket or buffering it.

OutgoingMessage.prototype._send = function _send(data, encoding, callback, byteLength) {

// This is a shameful hack to get the headers and first body chunk onto

// the same packet. Future versions of Node are going to take care of

// this at a lower level and in a more general way.

if (!this._headerSent && this._header !== null) {

// `this._header` can be null if OutgoingMessage is used without a proper Socket

// See: /test/parallel/test-http-outgoing-message-inheritance.js

if (typeof data === 'string' &&

(encoding === 'utf8' || encoding === 'latin1' || !encoding)) {

data = this._header + data;

} else {

const header = this._header;

this.outputData.unshift({

data: header,

encoding: 'latin1',

callback: null,

});

this.outputSize += header.length;

this._onPendingData(header.length);

}

this._headerSent = true;

}

return this._writeRaw(data, encoding, callback, byteLength);

};

OutgoingMessage.prototype._writeRaw = _writeRaw;

function _writeRaw(data, encoding, callback, size) {

const conn = this[kSocket];

if (conn?.destroyed) {

// The socket was destroyed. If we're still trying to write to it,

// then we haven't gotten the 'close' event yet.

return false;

}

if (typeof encoding === 'function') {

callback = encoding;

encoding = null;

}

if (conn && conn._httpMessage === this && conn.writable) {

// There might be pending data in the this.output buffer.

if (this.outputData.length) {

this._flushOutput(conn);

}

// Directly write to socket.

return conn.write(data, encoding, callback);

}

// Buffer, as long as we're not destroyed.

this.outputData.push({ data, encoding, callback });

this.outputSize += data.length;

this._onPendingData(data.length);

return this.outputSize < this[kHighWaterMark];

}

OutgoingMessage.prototype._storeHeader = _storeHeader;

function _storeHeader(firstLine, headers) {

// 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,

};

if (headers) {

if (headers === this[kOutHeaders]) {

for (const key in headers) {

const entry = headers[key];

processHeader(this, state, entry[0], entry[1], false);

}

} else if (ArrayIsArray(headers)) {

if (headers.length && ArrayIsArray(headers[0])) {

for (let i = 0; i < headers.length; i++) {

const entry = headers[i];

processHeader(this, state, entry[0], entry[1], true);

}

} else {

if (headers.length % 2 !== 0) {

throw new ERR_INVALID_ARG_VALUE('headers', headers);

}

for (let n = 0; n < headers.length; n += 2) {

processHeader(this, state, headers[n + 0], headers[n + 1], true);

}

}

} else {

for (const key in headers) {

if (ObjectHasOwn(headers, key)) {

processHeader(this, state, key, headers[key], true);

}

}

}

}

let { header } = state;

// Date header

if (this.sendDate && !state.date) {

header += 'Date: ' + utcDate() + '\r\n';

}

// 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;

}

// keep-alive logic

if (this._removedConnection) {

// shouldKeepAlive is generally true for HTTP/1.1. In that common case,

// even if the connection header isn't sent, we still persist by default.

this._last = !this.shouldKeepAlive;

} else if (!state.connection) {

const shouldSendKeepAlive = this.shouldKeepAlive &&

(state.contLen || this.useChunkedEncodingByDefault || this.agent);

if (shouldSendKeepAlive && this.maxRequestsOnConnectionReached) {

header += 'Connection: close\r\n';

} else if (shouldSendKeepAlive) {

header += 'Connection: keep-alive\r\n';

if (this._keepAliveTimeout && this._defaultKeepAlive) {

const timeoutSeconds = MathFloor(this._keepAliveTimeout / 1000);

let max = '';

if (~~this._maxRequestsPerSocket > 0) {

max = `, max=${this._maxRequestsPerSocket}`;

}

header += `Keep-Alive: timeout=${timeoutSeconds}${max}\r\n`;

}

} else {

this._last = true;

header += 'Connection: close\r\n';

}

}

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') {

header += 'Content-Length: ' + this._contentLength + '\r\n';

} else if (!this._removedTE) {

header += 'Transfer-Encoding: chunked\r\n';

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');

// We can't keep alive in this case, because with no header info the body

// is defined as all data until the connection is closed.

this._last = true;

}

}

// 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();

}

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('');

}

function processHeader(self, state, key, value, validate) {

if (validate)

validateHeaderName(key);

// If key is content-disposition and there is content-length

// encode the value in latin1

// https://www.rfc-editor.org/rfc/rfc6266#section-4.3

// Refs: https://github.com/nodejs/node/pull/46528

if (isContentDispositionField(key) && self._contentLength) {

// The value could be an array here

if (ArrayIsArray(value)) {

for (let i = 0; i < value.length; i++) {

value[i] = Buffer.from(value[i], 'latin1');

}

} else {

value = Buffer.from(value, 'latin1');

}

}

if (ArrayIsArray(value)) {

if (

(value.length < 2 || !isCookieField(key)) &&

(!self[kUniqueHeaders] || !self[kUniqueHeaders].has(key.toLowerCase()))

) {

// Retain for(;;) loop for performance reasons

// Refs: https://github.com/nodejs/node/pull/30958

for (let i = 0; i < value.length; i++)

storeHeader(self, state, key, value[i], validate);

return;

}

value = value.join('; ');

}

storeHeader(self, state, key, value, validate);

}

function storeHeader(self, state, key, value, validate) {

if (validate)

validateHeaderValue(key, value);

state.header += key + ': ' + value + '\r\n';

matchHeader(self, state, key, value);

}

function matchHeader(self, state, field, value) {

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.test(value))

self._last = true;

else

self.shouldKeepAlive = true;

break;

case 'transfer-encoding':

state.te = true;

self._removedTE = false;

if (RE_TE_CHUNKED.test(value))

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;

}

}

const validateHeaderName = assignFunctionName('validateHeaderName', hideStackFrames((name, label) => {

if (typeof name !== 'string' || !name || !checkIsHttpToken(name)) {

throw new ERR_INVALID_HTTP_TOKEN.HideStackFramesError(label || 'Header name', name);

}

}));

const validateHeaderValue = assignFunctionName('validateHeaderValue', hideStackFrames((name, value) => {

if (value === undefined) {

throw new ERR_HTTP_INVALID_HEADER_VALUE.HideStackFramesError(value, name);

}

if (checkInvalidHeaderChar(value)) {

debug('Header "%s" contains invalid characters', name);

throw new ERR_INVALID_CHAR.HideStackFramesError('header content', name);

}

}));

function parseUniqueHeadersOption(headers) {

if (!ArrayIsArray(headers)) {

return null;

}

const unique = new SafeSet();

const l = headers.length;

for (let i = 0; i < l; i++) {

unique.add(headers[i].toLowerCase());

}

return unique;

}

OutgoingMessage.prototype.setHeader = function setHeader(name, value) {

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 = { __proto__: null };

headers[name.toLowerCase()] = [name, value];

return this;

};

OutgoingMessage.prototype.setHeaders = function setHeaders(headers) {

if (this._header) {

throw new ERR_HTTP_HEADERS_SENT('set');

}

if (

!headers ||

ArrayIsArray(headers) ||

typeof headers.keys !== 'function' ||

typeof headers.get !== 'function'

) {

throw new ERR_INVALID_ARG_TYPE('headers', ['Headers', 'Map'], headers);

}

// Headers object joins multiple cookies with a comma when using

// the getter to retrieve the value,

// unless iterating over the headers directly.

// We also cannot safely split by comma.

// To avoid setHeader overwriting the previous value we push

// set-cookie values in array and set them all at once.

const cookies = [];

for (const { 0: key, 1: value } of headers) {

if (key === 'set-cookie') {

if (ArrayIsArray(value)) {

cookies.push(...value);

} else {

cookies.push(value);

}

continue;

}

this.setHeader(key, value);

}

if (cookies.length) {

this.setHeader('set-cookie', cookies);

}

return this;

};

OutgoingMessage.prototype.appendHeader = function appendHeader(name, value) {

if (this._header) {

throw new ERR_HTTP_HEADERS_SENT('append');

}

validateHeaderName(name);

validateHeaderValue(name, value);

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 (!ArrayIsArray(headers[field][1])) {

headers[field][1] = [headers[field][1]];

}

const existingValues = headers[field][1];

if (ArrayIsArray(value)) {

for (let i = 0, length = value.length; i < length; i++) {

existingValues.push(value[i]);

}

} else {

existingValues.push(value);

}

return this;

};

OutgoingMessage.prototype.getHeader = function getHeader(name) {

validateString(name, 'name');

const headers = this[kOutHeaders];

if (headers === null)

return;

const entry = headers[name.toLowerCase()];

return entry?.[1];

};

// Returns an array of the names of the current outgoing headers.

OutgoingMessage.prototype.getHeaderNames = function getHeaderNames() {

return this[kOutHeaders] !== null ? ObjectKeys(this[kOutHeaders]) : [];

};

// Returns an array of the names of the current outgoing raw headers.

OutgoingMessage.prototype.getRawHeaderNames = function getRawHeaderNames() {

const headersMap = this[kOutHeaders];

if (headersMap === null) return [];

const values = ObjectValues(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++) {

headers[i] = values[i][0];

}

return headers;

};

// Returns a shallow copy of the current outgoing headers.

OutgoingMessage.prototype.getHeaders = function getHeaders() {

const headers = this[kOutHeaders];

const ret = { __proto__: null };

if (headers) {

const keys = ObjectKeys(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;

};

OutgoingMessage.prototype.hasHeader = function hasHeader(name) {

validateString(name, 'name');

return this[kOutHeaders] !== null &&

!!this[kOutHeaders][name.toLowerCase()];

};

OutgoingMessage.prototype.removeHeader = function removeHeader(name) {

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];

}

};

OutgoingMessage.prototype._implicitHeader = function _implicitHeader() {

throw new ERR_METHOD_NOT_IMPLEMENTED('_implicitHeader()');

};

ObjectDefineProperty(OutgoingMessage.prototype, 'headersSent', {

__proto__: null,

configurable: true,

enumerable: true,

get: function() { return !!this._header; },

});

ObjectDefineProperty(OutgoingMessage.prototype, 'writableEnded', {

__proto__: null,

get: function() { return this.finished; },

});

ObjectDefineProperty(OutgoingMessage.prototype, 'writableNeedDrain', {

__proto__: null,

get: function() {

return !this.destroyed && !this.finished && this[kNeedDrain];

},

});

const crlf_buf = Buffer.from('\r\n');

OutgoingMessage.prototype.write = function write(chunk, encoding, callback) {

if (typeof encoding === 'function') {

callback = encoding;

encoding = null;

}

const ret = write_(this, chunk, encoding, callback, false);

if (!ret)

this[kNeedDrain] = true;

return ret;

};

function onError(msg, err, callback) {

if (msg.destroyed) {

return;

}

const triggerAsyncId = msg.socket ? msg.socket[async_id_symbol] : undefined;

defaultTriggerAsyncIdScope(triggerAsyncId,

process.nextTick,

emitErrorNt,

msg,

err,

callback);

}

function emitErrorNt(msg, err, callback) {

callback(err);

if (typeof msg.emit === 'function' && !msg.destroyed) {

msg.emit('error', err);

}

}

function strictContentLength(msg) {

return (

msg.strictContentLength &&

msg._contentLength != null &&

msg._hasBody &&

!msg._removedContLen &&

!msg.chunkedEncoding &&

!msg.hasHeader('transfer-encoding')

);

}

function write_(msg, chunk, encoding, callback, fromEnd) {

if (typeof callback !== 'function')

callback = nop;

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 err;

if (msg.finished) {

err = new ERR_STREAM_WRITE_AFTER_END();

} else if (msg.destroyed) {

err = new ERR_STREAM_DESTROYED('write');

}

if (err) {

if (!msg.destroyed) {

onError(msg, err, callback);

} else {

process.nextTick(callback, err);

}

return false;

}

let len;

if (msg.strictContentLength) {

len ??= typeof chunk === 'string' ? Buffer.byteLength(chunk, encoding) : chunk.byteLength;

if (

strictContentLength(msg) &&

(fromEnd ? msg[kBytesWritten] + len !== msg._contentLength : msg[kBytesWritten] + len > msg._contentLength)

) {

throw new ERR_HTTP_CONTENT_LENGTH_MISMATCH(len + msg[kBytesWritten], msg._contentLength);

}

msg[kBytesWritten] += len;

}

if (!msg._header) {

if (fromEnd) {

len ??= typeof chunk === 'string' ? Buffer.byteLength(chunk, encoding) : chunk.byteLength;

msg._contentLength = len;

}

msg._implicitHeader();

}

if (!msg._hasBody) {

if (msg[kRejectNonStandardBodyWrites]) {

throw new ERR_HTTP_BODY_NOT_ALLOWED();

} else {

debug('This type of response MUST NOT have a body. ' +

'Ignoring write() calls.');

process.nextTick(callback);

return true;

}

}

if (!fromEnd && msg.socket && !msg.socket.writableCorked) {

msg.socket.cork();

process.nextTick(connectionCorkNT, msg.socket);

}

let ret;

if (msg.chunkedEncoding && chunk.length !== 0) {

len ??= typeof chunk === 'string' ? Buffer.byteLength(chunk, encoding) : chunk.byteLength;

if (msg[kCorked] && msg._headerSent) {

msg[kChunkedBuffer].push(chunk, encoding, callback);

msg[kChunkedLength] += len;

ret = msg[kChunkedLength] < msg[kHighWaterMark];

} else {

msg._send(len.toString(16), 'latin1', null);

msg._send(crlf_buf, null, null);

msg._send(chunk, encoding, null, len);

ret = msg._send(crlf_buf, null, callback);

}

} else {

ret = msg._send(chunk, encoding, callback, len);

}

debug('write ret = ' + ret);

return ret;

}

function connectionCorkNT(conn) {

conn.uncork();

}

OutgoingMessage.prototype.addTrailers = function addTrailers(headers) {

this._trailer = '';

const keys = ObjectKeys(headers);

const isArray = ArrayIsArray(headers);

// Retain for(;;) loop for performance reasons

// Refs: https://github.com/nodejs/node/pull/30958

for (let i = 0, l = keys.length; i < l; i++) {

let field, value;

const key = keys[i];

if (isArray) {

field = headers[key][0];

value = headers[key][1];

} else {

field = key;

value = headers[key];

}

validateHeaderName(field, 'Trailer name');

// Check if the field must be sent several times

const isArrayValue = ArrayIsArray(value);

if (

isArrayValue && value.length > 1 &&

(!this[kUniqueHeaders] || !this[kUniqueHeaders].has(field.toLowerCase()))

) {