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|
// 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,
ArrayPrototypeJoin,
MathFloor,
NumberPrototypeToString,
ObjectCreate,
ObjectDefineProperty,
ObjectKeys,
ObjectValues,
ObjectPrototypeHasOwnProperty,
ObjectSetPrototypeOf,
RegExpPrototypeTest,
StringPrototypeToLowerCase,
Symbol,
} = primordials;
const { getDefaultHighWaterMark } = require('internal/streams/state');
const assert = require('internal/assert');
const EE = require('events');
const Stream = require('stream');
const internalUtil = require('internal/util');
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_HEADERS_SENT,
ERR_HTTP_INVALID_HEADER_VALUE,
ERR_HTTP_TRAILER_INVALID,
ERR_INVALID_HTTP_TOKEN,
ERR_INVALID_ARG_TYPE,
ERR_INVALID_ARG_VALUE,
ERR_INVALID_CHAR,
ERR_METHOD_NOT_IMPLEMENTED,
ERR_STREAM_CANNOT_PIPE,
ERR_STREAM_ALREADY_FINISHED,
ERR_STREAM_WRITE_AFTER_END,
ERR_STREAM_NULL_VALUES,
ERR_STREAM_DESTROYED
},
hideStackFrames
} = require('internal/errors');
const { validateString } = require('internal/validators');
const { isUint8Array } = require('internal/util/types');
let debug = require('internal/util/debuglog').debuglog('http', (fn) => {
debug = fn;
});
const HIGH_WATER_MARK = getDefaultHighWaterMark();
const kCorked = Symbol('corked');
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 && StringPrototypeToLowerCase(s) === 'cookie';
}
function OutgoingMessage() {
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._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;
}
ObjectSetPrototypeOf(OutgoingMessage.prototype, Stream.prototype);
ObjectSetPrototypeOf(OutgoingMessage, Stream);
ObjectDefineProperty(OutgoingMessage.prototype, 'writableFinished', {
get() {
return (
this.finished &&
this.outputSize === 0 &&
(!this.socket || this.socket.writableLength === 0)
);
}
});
ObjectDefineProperty(OutgoingMessage.prototype, 'writableObjectMode', {
get() {
return false;
}
});
ObjectDefineProperty(OutgoingMessage.prototype, 'writableLength', {
get() {
return this.outputSize + (this.socket ? this.socket.writableLength : 0);
}
});
ObjectDefineProperty(OutgoingMessage.prototype, 'writableHighWaterMark', {
get() {
return this.socket ? this.socket.writableHighWaterMark : HIGH_WATER_MARK;
}
});
ObjectDefineProperty(OutgoingMessage.prototype, 'writableCorked', {
get() {
const corked = this.socket ? this.socket.writableCorked : 0;
return corked + this[kCorked];
}
});
ObjectDefineProperty(OutgoingMessage.prototype, '_headers', {
get: internalUtil.deprecate(function() {
return this.getHeaders();
}, 'OutgoingMessage.prototype._headers is deprecated', 'DEP0066'),
set: internalUtil.deprecate(function(val) {
if (val == null) {
this[kOutHeaders] = null;
} else if (typeof val === 'object') {
const headers = this[kOutHeaders] = ObjectCreate(null);
const keys = ObjectKeys(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[StringPrototypeToLowerCase(name)] = [name, val[name]];
}
}
}, 'OutgoingMessage.prototype._headers is deprecated', 'DEP0066')
});
ObjectDefineProperty(OutgoingMessage.prototype, 'connection', {
get: function() {
return this.socket;
},
set: function(val) {
this.socket = val;
}
});
ObjectDefineProperty(OutgoingMessage.prototype, '_headerNames', {
get: internalUtil.deprecate(function() {
const headers = this[kOutHeaders];
if (headers !== null) {
const out = ObjectCreate(null);
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][0];
out[key] = val;
}
return out;
}
return null;
}, 'OutgoingMessage.prototype._headerNames is deprecated', 'DEP0066'),
set: internalUtil.deprecate(function(val) {
if (typeof val === 'object' && val !== null) {
const headers = this[kOutHeaders];
if (!headers)
return;
const keys = ObjectKeys(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')
});
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() {
if (this.socket) {
this.socket.cork();
} else {
this[kCorked]++;
}
};
OutgoingMessage.prototype.uncork = function() {
if (this.socket) {
this.socket.uncork();
} else if (this[kCorked]) {
this[kCorked]--;
}
};
OutgoingMessage.prototype.setTimeout = function setTimeout(msecs, callback) {
if (callback) {
this.on('timeout', callback);
}
if (!this.socket) {
this.once('socket', function socketSetTimeoutOnConnect(socket) {
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.
OutgoingMessage.prototype.destroy = function destroy(error) {
if (this.destroyed) {
return this;
}
this.destroyed = true;
if (this.socket) {
this.socket.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) {
// 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) {
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);
};
OutgoingMessage.prototype._writeRaw = _writeRaw;
function _writeRaw(data, encoding, callback) {
const conn = this.socket;
if (conn && 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 < HIGH_WATER_MARK;
}
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 (ObjectPrototypeHasOwnProperty(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) {
this._last = true;
this.shouldKeepAlive = false;
} else if (!state.connection) {
const shouldSendKeepAlive = this.shouldKeepAlive &&
(state.contLen || this.useChunkedEncodingByDefault || this.agent);
if (shouldSendKeepAlive) {
header += 'Connection: keep-alive\r\n';
if (this._keepAliveTimeout && this._defaultKeepAlive) {
const timeoutSeconds = MathFloor(this._keepAliveTimeout / 1000);
header += `Keep-Alive: timeout=${timeoutSeconds}\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');
}
}
// 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 (ArrayIsArray(value)) {
if (value.length < 2 || !isCookieField(key)) {
// 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 = ArrayPrototypeJoin(value, '; ');
}
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 = StringPrototypeToLowerCase(field);
switch (field) {
case 'connection':
state.connection = true;
self._removedConnection = false;
if (RegExpPrototypeTest(RE_CONN_CLOSE, value))
self._last = true;
else
self.shouldKeepAlive = true;
break;
case 'transfer-encoding':
state.te = true;
self._removedTE = false;
if (RegExpPrototypeTest(RE_TE_CHUNKED, value))
self.chunkedEncoding = true;
break;
case 'content-length':
state.contLen = true;
self._removedContLen = false;
break;
case 'date':
case 'expect':
case 'trailer':
state[field] = true;
break;
case 'keep-alive':
self._defaultKeepAlive = false;
break;
}
}
const validateHeaderName = hideStackFrames((name) => {
if (typeof name !== 'string' || !name || !checkIsHttpToken(name)) {
throw new ERR_INVALID_HTTP_TOKEN('Header name', name);
}
});
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);
}
});
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 = ObjectCreate(null);
headers[StringPrototypeToLowerCase(name)] = [name, value];
return this;
};
OutgoingMessage.prototype.getHeader = function getHeader(name) {
validateString(name, 'name');
const headers = this[kOutHeaders];
if (headers === null)
return;
const entry = headers[StringPrototypeToLowerCase(name)];
return entry && 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 = ObjectCreate(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][StringPrototypeToLowerCase(name)];
};
OutgoingMessage.prototype.removeHeader = function removeHeader(name) {
validateString(name, 'name');
if (this._header) {
throw new ERR_HTTP_HEADERS_SENT('remove');
}
const key = StringPrototypeToLowerCase(name);
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', {
configurable: true,
enumerable: true,
get: function() { return !!this._header; }
});
ObjectDefineProperty(OutgoingMessage.prototype, 'writableEnded', {
get: function() { return this.finished; }
});
ObjectDefineProperty(OutgoingMessage.prototype, 'writableNeedDrain', {
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) {
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._closed) {
msg.emit('error', err);
}
}
function write_(msg, chunk, encoding, callback, fromEnd) {
if (typeof callback !== 'function')
callback = nop;
let len;
if (chunk === null) {
throw new ERR_STREAM_NULL_VALUES();
} else if (typeof chunk === 'string') {
len = Buffer.byteLength(chunk, encoding);
} else if (isUint8Array(chunk)) {
len = chunk.length;
} else {
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;
}
if (!msg._header) {
if (fromEnd) {
msg._contentLength = len;
}
msg._implicitHeader();
}
if (!msg._hasBody) {
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) {
msg._send(NumberPrototypeToString(len, 16), 'latin1', null);
msg._send(crlf_buf, null, null);
msg._send(chunk, encoding, null);
ret = msg._send(crlf_buf, null, callback);
} else {
ret = msg._send(chunk, encoding, callback);
}
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];
}
if (typeof field !== 'string' || !field || !checkIsHttpToken(field)) {
throw new ERR_INVALID_HTTP_TOKEN('Trailer name', field);
}
if (checkInvalidHeaderChar(value)) {
debug('Trailer "%s" contains invalid characters', field);
throw new ERR_INVALID_CHAR('trailer content', field);
}
this._trailer += field + ': ' + value + '\r\n';
}
};
function onFinish(outmsg) {
if (outmsg && outmsg.socket && outmsg.socket._hadError) return;
outmsg.emit('finish');
}
OutgoingMessage.prototype.end = function end(chunk, encoding, callback) {
if (typeof chunk === 'function') {
callback = chunk;
chunk = null;
encoding = null;
} else if (typeof encoding === 'function') {
callback = encoding;
encoding = null;
}
if (chunk) {
if (this.finished) {
onError(this,
new ERR_STREAM_WRITE_AFTER_END(),
typeof callback !== 'function' ? nop : callback);
return this;
}
if (this.socket) {
this.socket.cork();
}
write_(this, chunk, encoding, null, true);
} else if (this.finished) {
if (typeof callback === 'function') {
if (!this.writableFinished) {
this.on('finish', callback);
} else {
callback(new ERR_STREAM_ALREADY_FINISHED('end'));
}
}
return this;
} else if (!this._header) {
if (this.socket) {
this.socket.cork();
}
this._contentLength = 0;
this._implicitHeader();
}
if (typeof callback === 'function')
this.once('finish', callback);
const finish = onFinish.bind(undefined, this);
if (this._hasBody && this.chunkedEncoding) {
this._send('0\r\n' + this._trailer + '\r\n', 'latin1', finish);
} else {
// Force a flush, HACK.
this._send('', 'latin1', finish);
}
if (this.socket) {
// Fully uncork connection on end().
this.socket._writableState.corked = 1;
this.socket.uncork();
}
this[kCorked] = 0;
this.finished = true;
// There is the first message on the outgoing queue, and we've sent
// everything to the socket.
debug('outgoing message end.');
if (this.outputData.length === 0 &&
this.socket &&
this.socket._httpMessage === this) {
this._finish();
}
return this;
};
OutgoingMessage.prototype._finish = function _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.
OutgoingMessage.prototype._flush = function _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');
}
}
};
OutgoingMessage.prototype._flushOutput = function _flushOutput(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;
};
OutgoingMessage.prototype.flushHeaders = function flushHeaders() {
if (!this._header) {
this._implicitHeader();
}
// Force-flush the headers.
this._send('');
};
OutgoingMessage.prototype.pipe = function pipe() {
// OutgoingMessage should be write-only. Piping from it is disabled.
this.emit('error', new ERR_STREAM_CANNOT_PIPE());
};
OutgoingMessage.prototype[EE.captureRejectionSymbol] =
function(err, event) {
this.destroy(err);
};
module.exports = {
validateHeaderName,
validateHeaderValue,
OutgoingMessage
};
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