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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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var util = require('util');
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var net = require('net');
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var EventEmitter = require('events').EventEmitter;
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var HTTPParser = process.binding('http_parser').HTTPParser;
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var assert = require('assert').ok;
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var common = require('_http_common');
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var parsers = common.parsers;
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var freeParser = common.freeParser;
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var debug = common.debug;
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var CRLF = common.CRLF;
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var continueExpression = common.continueExpression;
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var chunkExpression = common.chunkExpression;
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var httpSocketSetup = common.httpSocketSetup;
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var OutgoingMessage = require('_http_outgoing').OutgoingMessage;
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var STATUS_CODES = exports.STATUS_CODES = {
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100 : 'Continue',
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101 : 'Switching Protocols',
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102 : 'Processing', // RFC 2518, obsoleted by RFC 4918
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200 : 'OK',
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201 : 'Created',
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202 : 'Accepted',
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203 : 'Non-Authoritative Information',
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204 : 'No Content',
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205 : 'Reset Content',
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206 : 'Partial Content',
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207 : 'Multi-Status', // RFC 4918
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300 : 'Multiple Choices',
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301 : 'Moved Permanently',
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302 : 'Moved Temporarily',
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303 : 'See Other',
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304 : 'Not Modified',
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305 : 'Use Proxy',
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307 : 'Temporary Redirect',
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400 : 'Bad Request',
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401 : 'Unauthorized',
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402 : 'Payment Required',
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403 : 'Forbidden',
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404 : 'Not Found',
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405 : 'Method Not Allowed',
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406 : 'Not Acceptable',
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407 : 'Proxy Authentication Required',
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408 : 'Request Time-out',
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409 : 'Conflict',
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410 : 'Gone',
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411 : 'Length Required',
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412 : 'Precondition Failed',
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413 : 'Request Entity Too Large',
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414 : 'Request-URI Too Large',
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415 : 'Unsupported Media Type',
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416 : 'Requested Range Not Satisfiable',
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417 : 'Expectation Failed',
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418 : 'I\'m a teapot', // RFC 2324
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422 : 'Unprocessable Entity', // RFC 4918
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423 : 'Locked', // RFC 4918
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424 : 'Failed Dependency', // RFC 4918
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425 : 'Unordered Collection', // RFC 4918
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426 : 'Upgrade Required', // RFC 2817
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428 : 'Precondition Required', // RFC 6585
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429 : 'Too Many Requests', // RFC 6585
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431 : 'Request Header Fields Too Large',// RFC 6585
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500 : 'Internal Server Error',
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501 : 'Not Implemented',
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502 : 'Bad Gateway',
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503 : 'Service Unavailable',
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504 : 'Gateway Time-out',
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505 : 'HTTP Version Not Supported',
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506 : 'Variant Also Negotiates', // RFC 2295
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507 : 'Insufficient Storage', // RFC 4918
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509 : 'Bandwidth Limit Exceeded',
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510 : 'Not Extended', // RFC 2774
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511 : 'Network Authentication Required' // RFC 6585
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};
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function ServerResponse(req) {
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OutgoingMessage.call(this);
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if (req.method === 'HEAD') this._hasBody = false;
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this.sendDate = true;
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if (req.httpVersionMajor < 1 || req.httpVersionMinor < 1) {
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this.useChunkedEncodingByDefault = chunkExpression.test(req.headers.te);
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this.shouldKeepAlive = false;
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}
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}
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util.inherits(ServerResponse, OutgoingMessage);
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ServerResponse.prototype._finish = function() {
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DTRACE_HTTP_SERVER_RESPONSE(this.connection);
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COUNTER_HTTP_SERVER_RESPONSE();
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OutgoingMessage.prototype._finish.call(this);
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};
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exports.ServerResponse = ServerResponse;
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ServerResponse.prototype.statusCode = 200;
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ServerResponse.prototype.statusMessage = undefined;
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function onServerResponseClose() {
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// EventEmitter.emit makes a copy of the 'close' listeners array before
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// calling the listeners. detachSocket() unregisters onServerResponseClose
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// but if detachSocket() is called, directly or indirectly, by a 'close'
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// listener, onServerResponseClose is still in that copy of the listeners
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// array. That is, in the example below, b still gets called even though
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// it's been removed by a:
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//
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// var obj = new events.EventEmitter;
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// obj.on('event', a);
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// obj.on('event', b);
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// function a() { obj.removeListener('event', b) }
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// function b() { throw "BAM!" }
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// obj.emit('event'); // throws
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//
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// Ergo, we need to deal with stale 'close' events and handle the case
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// where the ServerResponse object has already been deconstructed.
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// Fortunately, that requires only a single if check. :-)
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if (this._httpMessage) this._httpMessage.emit('close');
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}
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ServerResponse.prototype.assignSocket = function(socket) {
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assert(!socket._httpMessage);
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socket._httpMessage = this;
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socket.on('close', onServerResponseClose);
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this.socket = socket;
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this.connection = socket;
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this.emit('socket', socket);
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this._flush();
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};
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ServerResponse.prototype.detachSocket = function(socket) {
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assert(socket._httpMessage === this);
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socket.removeListener('close', onServerResponseClose);
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socket._httpMessage = null;
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this.socket = this.connection = null;
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};
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ServerResponse.prototype.writeContinue = function(cb) {
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this._writeRaw('HTTP/1.1 100 Continue' + CRLF + CRLF, 'ascii', cb);
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this._sent100 = true;
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};
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ServerResponse.prototype._implicitHeader = function() {
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this.writeHead(this.statusCode);
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};
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ServerResponse.prototype.writeHead = function(statusCode) {
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var headers, headerIndex;
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if (util.isString(arguments[1])) {
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this.statusMessage = arguments[1];
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headerIndex = 2;
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} else {
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this.statusMessage =
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this.statusMessage || STATUS_CODES[statusCode] || 'unknown';
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headerIndex = 1;
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}
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this.statusCode = statusCode;
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var obj = arguments[headerIndex];
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if (obj && this._headers) {
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if (util.isArray(obj)) {
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// handle array case
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// TODO: remove when array is no longer accepted
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var field;
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for (var i = 0, len = obj.length; i < len; ++i) {
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field = obj[i][0];
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if (!util.isUndefined(headers[field])) {
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obj.push([field, headers[field]]);
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}
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}
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headers = obj;
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} else {
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// handle object case
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var keys = Object.keys(obj);
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for (var i = 0; i < keys.length; i++) {
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var k = keys[i];
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if (k) this.setHeader(k, obj[k]);
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}
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// Slow-case: when progressive API and header fields are passed.
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headers = this._renderHeaders();
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}
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} else if (this._headers) {
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// only progressive api is used
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headers = this._renderHeaders();
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} else {
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// only writeHead() called
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headers = obj;
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}
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var statusLine = 'HTTP/1.1 ' + statusCode.toString() + ' ' +
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this.statusMessage + CRLF;
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if (statusCode === 204 || statusCode === 304 ||
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(100 <= statusCode && statusCode <= 199)) {
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// RFC 2616, 10.2.5:
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// The 204 response MUST NOT include a message-body, and thus is always
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// terminated by the first empty line after the header fields.
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// RFC 2616, 10.3.5:
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// The 304 response MUST NOT contain a message-body, and thus is always
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// terminated by the first empty line after the header fields.
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// RFC 2616, 10.1 Informational 1xx:
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// This class of status code indicates a provisional response,
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// consisting only of the Status-Line and optional headers, and is
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// terminated by an empty line.
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this._hasBody = false;
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}
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// don't keep alive connections where the client expects 100 Continue
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// but we sent a final status; they may put extra bytes on the wire.
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if (this._expect_continue && !this._sent100) {
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this.shouldKeepAlive = false;
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}
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this._storeHeader(statusLine, headers);
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};
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ServerResponse.prototype.writeHeader = function() {
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this.writeHead.apply(this, arguments);
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};
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function Server(requestListener) {
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if (!(this instanceof Server)) return new Server(requestListener);
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net.Server.call(this, { allowHalfOpen: true });
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if (requestListener) {
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this.addListener('request', requestListener);
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}
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// Similar option to this. Too lazy to write my own docs.
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// http://www.squid-cache.org/Doc/config/half_closed_clients/
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// http://wiki.squid-cache.org/SquidFaq/InnerWorkings#What_is_a_half-closed_filedescriptor.3F
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this.httpAllowHalfOpen = false;
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this.addListener('connection', connectionListener);
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this.addListener('clientError', function(err, conn) {
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conn.destroy(err);
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});
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this.timeout = 2 * 60 * 1000;
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}
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util.inherits(Server, net.Server);
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Server.prototype.setTimeout = function(msecs, callback) {
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this.timeout = msecs;
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if (callback)
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this.on('timeout', callback);
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};
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exports.Server = Server;
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function connectionListener(socket) {
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var self = this;
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var outgoing = [];
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var incoming = [];
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function abortIncoming() {
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while (incoming.length) {
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var req = incoming.shift();
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req.emit('aborted');
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req.emit('close');
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}
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// abort socket._httpMessage ?
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}
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function serverSocketCloseListener() {
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debug('server socket close');
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// mark this parser as reusable
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if (this.parser)
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freeParser(this.parser);
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abortIncoming();
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}
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debug('SERVER new http connection');
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httpSocketSetup(socket);
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// If the user has added a listener to the server,
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// request, or response, then it's their responsibility.
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// otherwise, destroy on timeout by default
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if (self.timeout)
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socket.setTimeout(self.timeout);
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socket.on('timeout', function() {
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var req = socket.parser && socket.parser.incoming;
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var reqTimeout = req && !req.complete && req.emit('timeout', socket);
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var res = socket._httpMessage;
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var resTimeout = res && res.emit('timeout', socket);
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var serverTimeout = self.emit('timeout', socket);
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if (!reqTimeout && !resTimeout && !serverTimeout)
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socket.destroy();
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});
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var parser = parsers.alloc();
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parser.reinitialize(HTTPParser.REQUEST);
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parser.socket = socket;
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socket.parser = parser;
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parser.incoming = null;
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// Propagate headers limit from server instance to parser
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if (util.isNumber(this.maxHeadersCount)) {
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parser.maxHeaderPairs = this.maxHeadersCount << 1;
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} else {
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// Set default value because parser may be reused from FreeList
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parser.maxHeaderPairs = 2000;
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}
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socket.addListener('error', socketOnError);
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socket.addListener('close', serverSocketCloseListener);
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parser.onIncoming = parserOnIncoming;
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socket.on('end', socketOnEnd);
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socket.on('data', socketOnData);
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// TODO(isaacs): Move all these functions out of here
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function socketOnError(e) {
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self.emit('clientError', e, this);
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}
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function socketOnData(d) {
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assert(!socket._paused);
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debug('SERVER socketOnData %d', d.length);
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var ret = parser.execute(d);
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if (ret instanceof Error) {
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debug('parse error');
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socket.destroy(ret);
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} else if (parser.incoming && parser.incoming.upgrade) {
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// Upgrade or CONNECT
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var bytesParsed = ret;
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var req = parser.incoming;
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debug('SERVER upgrade or connect', req.method);
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socket.removeListener('data', socketOnData);
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socket.removeListener('end', socketOnEnd);
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socket.removeListener('close', serverSocketCloseListener);
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parser.finish();
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freeParser(parser, req);
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var eventName = req.method === 'CONNECT' ? 'connect' : 'upgrade';
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if (EventEmitter.listenerCount(self, eventName) > 0) {
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debug('SERVER have listener for %s', eventName);
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var bodyHead = d.slice(bytesParsed, d.length);
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// TODO(isaacs): Need a way to reset a stream to fresh state
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// IE, not flowing, and not explicitly paused.
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socket._readableState.flowing = null;
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self.emit(eventName, req, socket, bodyHead);
|
|
|
|
} else {
|
|
|
|
// Got upgrade header or CONNECT method, but have no handler.
|
|
|
|
socket.destroy();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (socket._paused) {
|
|
|
|
// onIncoming paused the socket, we should pause the parser as well
|
|
|
|
debug('pause parser');
|
|
|
|
socket.parser.pause();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
function socketOnEnd() {
|
|
|
|
var socket = this;
|
|
|
|
var ret = parser.finish();
|
|
|
|
|
|
|
|
if (ret instanceof Error) {
|
|
|
|
debug('parse error');
|
|
|
|
socket.destroy(ret);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!self.httpAllowHalfOpen) {
|
|
|
|
abortIncoming();
|
|
|
|
if (socket.writable) socket.end();
|
|
|
|
} else if (outgoing.length) {
|
|
|
|
outgoing[outgoing.length - 1]._last = true;
|
|
|
|
} else if (socket._httpMessage) {
|
|
|
|
socket._httpMessage._last = true;
|
|
|
|
} else {
|
|
|
|
if (socket.writable) socket.end();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// The following callback is issued after the headers have been read on a
|
|
|
|
// new message. In this callback we setup the response object and pass it
|
|
|
|
// to the user.
|
|
|
|
|
|
|
|
socket._paused = false;
|
|
|
|
function socketOnDrain() {
|
|
|
|
// If we previously paused, then start reading again.
|
|
|
|
if (socket._paused) {
|
|
|
|
socket._paused = false;
|
|
|
|
socket.parser.resume();
|
|
|
|
socket.resume();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
socket.on('drain', socketOnDrain);
|
|
|
|
|
|
|
|
function parserOnIncoming(req, shouldKeepAlive) {
|
|
|
|
incoming.push(req);
|
|
|
|
|
|
|
|
// If the writable end isn't consuming, then stop reading
|
|
|
|
// so that we don't become overwhelmed by a flood of
|
|
|
|
// pipelined requests that may never be resolved.
|
|
|
|
if (!socket._paused) {
|
|
|
|
var needPause = socket._writableState.needDrain;
|
|
|
|
if (needPause) {
|
|
|
|
socket._paused = true;
|
|
|
|
// We also need to pause the parser, but don't do that until after
|
|
|
|
// the call to execute, because we may still be processing the last
|
|
|
|
// chunk.
|
|
|
|
socket.pause();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
var res = new ServerResponse(req);
|
|
|
|
|
|
|
|
res.shouldKeepAlive = shouldKeepAlive;
|
|
|
|
DTRACE_HTTP_SERVER_REQUEST(req, socket);
|
|
|
|
COUNTER_HTTP_SERVER_REQUEST();
|
|
|
|
|
|
|
|
if (socket._httpMessage) {
|
|
|
|
// There are already pending outgoing res, append.
|
|
|
|
outgoing.push(res);
|
|
|
|
} else {
|
|
|
|
res.assignSocket(socket);
|
|
|
|
}
|
|
|
|
|
|
|
|
// When we're finished writing the response, check if this is the last
|
|
|
|
// respose, if so destroy the socket.
|
|
|
|
res.on('prefinish', resOnFinish);
|
|
|
|
function resOnFinish() {
|
|
|
|
// Usually the first incoming element should be our request. it may
|
|
|
|
// be that in the case abortIncoming() was called that the incoming
|
|
|
|
// array will be empty.
|
|
|
|
assert(incoming.length === 0 || incoming[0] === req);
|
|
|
|
|
|
|
|
incoming.shift();
|
|
|
|
|
|
|
|
// if the user never called req.read(), and didn't pipe() or
|
|
|
|
// .resume() or .on('data'), then we call req._dump() so that the
|
|
|
|
// bytes will be pulled off the wire.
|
|
|
|
if (!req._consuming)
|
|
|
|
req._dump();
|
|
|
|
|
|
|
|
res.detachSocket(socket);
|
|
|
|
|
|
|
|
if (res._last) {
|
|
|
|
socket.destroySoon();
|
|
|
|
} else {
|
|
|
|
// start sending the next message
|
|
|
|
var m = outgoing.shift();
|
|
|
|
if (m) {
|
|
|
|
m.assignSocket(socket);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!util.isUndefined(req.headers.expect) &&
|
|
|
|
(req.httpVersionMajor == 1 && req.httpVersionMinor == 1) &&
|
|
|
|
continueExpression.test(req.headers['expect'])) {
|
|
|
|
res._expect_continue = true;
|
|
|
|
if (EventEmitter.listenerCount(self, 'checkContinue') > 0) {
|
|
|
|
self.emit('checkContinue', req, res);
|
|
|
|
} else {
|
|
|
|
res.writeContinue();
|
|
|
|
self.emit('request', req, res);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
self.emit('request', req, res);
|
|
|
|
}
|
|
|
|
return false; // Not a HEAD response. (Not even a response!)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
exports._connectionListener = connectionListener;
|