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| (function () { 'use strict';
const util = require('util');
const net = require('net');
const EventEmitter = require('events').EventEmitter;
const HTTPParser = process.binding('http_parser').HTTPParser;
const assert = require('assert').ok;
const common = require('_http_common');
const parsers = common.parsers;
const freeParser = common.freeParser;
const debug = common.debug;
const CRLF = common.CRLF;
const continueExpression = common.continueExpression;
const chunkExpression = common.chunkExpression;
const httpSocketSetup = common.httpSocketSetup;
const OutgoingMessage = require('_http_outgoing').OutgoingMessage;
const STATUS_CODES = exports.STATUS_CODES = {
100 : 'Continue',
101 : 'Switching Protocols',
102 : 'Processing', // RFC 2518, obsoleted by RFC 4918
200 : 'OK',
201 : 'Created',
202 : 'Accepted',
203 : 'Non-Authoritative Information',
204 : 'No Content',
205 : 'Reset Content',
206 : 'Partial Content',
207 : 'Multi-Status', // RFC 4918
300 : 'Multiple Choices',
301 : 'Moved Permanently',
302 : 'Moved Temporarily',
303 : 'See Other',
304 : 'Not Modified',
305 : 'Use Proxy',
307 : 'Temporary Redirect',
308 : 'Permanent Redirect', // RFC 7238
400 : 'Bad Request',
401 : 'Unauthorized',
402 : 'Payment Required',
403 : 'Forbidden',
404 : 'Not Found',
405 : 'Method Not Allowed',
406 : 'Not Acceptable',
407 : 'Proxy Authentication Required',
408 : 'Request Time-out',
409 : 'Conflict',
410 : 'Gone',
411 : 'Length Required',
412 : 'Precondition Failed',
413 : 'Request Entity Too Large',
414 : 'Request-URI Too Large',
415 : 'Unsupported Media Type',
416 : 'Requested Range Not Satisfiable',
417 : 'Expectation Failed',
418 : 'I\'m a teapot', // RFC 2324
422 : 'Unprocessable Entity', // RFC 4918
423 : 'Locked', // RFC 4918
424 : 'Failed Dependency', // RFC 4918
425 : 'Unordered Collection', // RFC 4918
426 : 'Upgrade Required', // RFC 2817
428 : 'Precondition Required', // RFC 6585
429 : 'Too Many Requests', // RFC 6585
431 : 'Request Header Fields Too Large',// RFC 6585
500 : 'Internal Server Error',
501 : 'Not Implemented',
502 : 'Bad Gateway',
503 : 'Service Unavailable',
504 : 'Gateway Time-out',
505 : 'HTTP Version Not Supported',
506 : 'Variant Also Negotiates', // RFC 2295
507 : 'Insufficient Storage', // RFC 4918
509 : 'Bandwidth Limit Exceeded',
510 : 'Not Extended', // RFC 2774
511 : 'Network Authentication Required' // RFC 6585
};
function ServerResponse(req) {
OutgoingMessage.call(this);
if (req.method === 'HEAD') this._hasBody = false;
this.sendDate = true;
if (req.httpVersionMajor < 1 || req.httpVersionMinor < 1) {
this.useChunkedEncodingByDefault = chunkExpression.test(req.headers.te);
this.shouldKeepAlive = false;
}
}
util.inherits(ServerResponse, OutgoingMessage);
ServerResponse.prototype._finish = function() {
DTRACE_HTTP_SERVER_RESPONSE(this.connection);
;
;
OutgoingMessage.prototype._finish.call(this);
};
exports.ServerResponse = ServerResponse;
ServerResponse.prototype.statusCode = 200;
ServerResponse.prototype.statusMessage = undefined;
function onServerResponseClose() {
// EventEmitter.emit makes a copy of the 'close' listeners array before
// calling the listeners. detachSocket() unregisters onServerResponseClose
// but if detachSocket() is called, directly or indirectly, by a 'close'
// listener, onServerResponseClose is still in that copy of the listeners
// array. That is, in the example below, b still gets called even though
// it's been removed by a:
//
// var obj = new events.EventEmitter;
// obj.on('event', a);
// obj.on('event', b);
// function a() { obj.removeListener('event', b) }
// function b() { throw "BAM!" }
// obj.emit('event'); // throws
//
// Ergo, we need to deal with stale 'close' events and handle the case
// where the ServerResponse object has already been deconstructed.
// Fortunately, that requires only a single if check. :-)
Eif (this._httpMessage) this._httpMessage.emit('close');
}
ServerResponse.prototype.assignSocket = function(socket) {
assert(!socket._httpMessage);
socket._httpMessage = this;
socket.on('close', onServerResponseClose);
this.socket = socket;
this.connection = socket;
this.emit('socket', socket);
this._flush();
};
ServerResponse.prototype.detachSocket = function(socket) {
assert(socket._httpMessage === this);
socket.removeListener('close', onServerResponseClose);
socket._httpMessage = null;
this.socket = this.connection = null;
};
ServerResponse.prototype.writeContinue = function(cb) {
this._writeRaw('HTTP/1.1 100 Continue' + CRLF + CRLF, 'ascii', cb);
this._sent100 = true;
};
ServerResponse.prototype._implicitHeader = function() {
this.writeHead(this.statusCode);
};
ServerResponse.prototype.writeHead = function(statusCode, reason, obj) {
var headers;
Iif (typeof reason === 'string') {
// writeHead(statusCode, reasonPhrase[, headers])
this.statusMessage = reason;
} else {
// writeHead(statusCode[, headers])
this.statusMessage =
this.statusMessage || STATUS_CODES[statusCode] || 'unknown';
obj = reason;
}
this.statusCode = statusCode;
if (this._headers) {
// Slow-case: when progressive API and header fields are passed.
if (obj) {
var keys = Object.keys(obj);
for (var i = 0; i < keys.length; i++) {
var k = keys[i];
Eif (k) this.setHeader(k, obj[k]);
}
}
// only progressive api is used
headers = this._renderHeaders();
} else {
// only writeHead() called
headers = obj;
}
var statusLine = 'HTTP/1.1 ' + statusCode.toString() + ' ' +
this.statusMessage + CRLF;
if (statusCode === 204 || statusCode === 304 ||
(100 <= statusCode && statusCode <= 199)) {
// RFC 2616, 10.2.5:
// The 204 response MUST NOT include a message-body, and thus is always
// terminated by the first empty line after the header fields.
// RFC 2616, 10.3.5:
// The 304 response MUST NOT contain a message-body, and thus is always
// terminated by the first empty line after the header fields.
// RFC 2616, 10.1 Informational 1xx:
// This class of status code indicates a provisional response,
// consisting only of the Status-Line and optional headers, and is
// terminated by an empty line.
this._hasBody = false;
}
// don't keep alive connections where the client expects 100 Continue
// but we sent a final status; they may put extra bytes on the wire.
Iif (this._expect_continue && !this._sent100) {
this.shouldKeepAlive = false;
}
this._storeHeader(statusLine, headers);
};
ServerResponse.prototype.writeHeader = function() {
this.writeHead.apply(this, arguments);
};
function Server(requestListener) {
if (!(this instanceof Server)) return new Server(requestListener);
net.Server.call(this, { allowHalfOpen: true });
if (requestListener) {
this.addListener('request', requestListener);
}
/* eslint-disable max-len */
// Similar option to this. Too lazy to write my own docs.
// http://www.squid-cache.org/Doc/config/half_closed_clients/
// http://wiki.squid-cache.org/SquidFaq/InnerWorkings#What_is_a_half-closed_filedescriptor.3F
/* eslint-enable max-len */
this.httpAllowHalfOpen = false;
this.addListener('connection', connectionListener);
this.addListener('clientError', function(err, conn) {
conn.destroy(err);
});
this.timeout = 2 * 60 * 1000;
}
util.inherits(Server, net.Server);
Server.prototype.setTimeout = function(msecs, callback) {
this.timeout = msecs;
Eif (callback)
this.on('timeout', callback);
return this;
};
exports.Server = Server;
function connectionListener(socket) {
var self = this;
var outgoing = [];
var incoming = [];
function abortIncoming() {
while (incoming.length) {
var req = incoming.shift();
req.emit('aborted');
req.emit('close');
}
// abort socket._httpMessage ?
}
function serverSocketCloseListener() {
debug('server socket close');
// mark this parser as reusable
Eif (this.parser) {
freeParser(this.parser, null, this);
}
abortIncoming();
}
debug('SERVER new http connection');
httpSocketSetup(socket);
// If the user has added a listener to the server,
// request, or response, then it's their responsibility.
// otherwise, destroy on timeout by default
Eif (self.timeout)
socket.setTimeout(self.timeout);
socket.on('timeout', function() {
var req = socket.parser && socket.parser.incoming;
var reqTimeout = req && !req.complete && req.emit('timeout', socket);
var res = socket._httpMessage;
var resTimeout = res && res.emit('timeout', socket);
var serverTimeout = self.emit('timeout', socket);
if (!reqTimeout && !resTimeout && !serverTimeout)
socket.destroy();
});
var parser = parsers.alloc();
parser.reinitialize(HTTPParser.REQUEST);
parser.socket = socket;
socket.parser = parser;
parser.incoming = null;
// Propagate headers limit from server instance to parser
if (typeof this.maxHeadersCount === 'number') {
parser.maxHeaderPairs = this.maxHeadersCount << 1;
} else {
// Set default value because parser may be reused from FreeList
parser.maxHeaderPairs = 2000;
}
socket.addListener('error', socketOnError);
socket.addListener('close', serverSocketCloseListener);
parser.onIncoming = parserOnIncoming;
socket.on('end', socketOnEnd);
socket.on('data', socketOnData);
// TODO(isaacs): Move all these functions out of here
function socketOnError(e) {
self.emit('clientError', e, this);
}
function socketOnData(d) {
assert(!socket._paused);
debug('SERVER socketOnData %d', d.length);
var ret = parser.execute(d);
if (ret instanceof Error) {
debug('parse error');
socket.destroy(ret);
} else if (parser.incoming && parser.incoming.upgrade) {
// Upgrade or CONNECT
var bytesParsed = ret;
var req = parser.incoming;
debug('SERVER upgrade or connect', req.method);
socket.removeListener('data', socketOnData);
socket.removeListener('end', socketOnEnd);
socket.removeListener('close', serverSocketCloseListener);
parser.finish();
freeParser(parser, req, null);
parser = null;
var eventName = req.method === 'CONNECT' ? 'connect' : 'upgrade';
if (EventEmitter.listenerCount(self, eventName) > 0) {
debug('SERVER have listener for %s', eventName);
var bodyHead = d.slice(bytesParsed, d.length);
// TODO(isaacs): Need a way to reset a stream to fresh state
// IE, not flowing, and not explicitly paused.
socket._readableState.flowing = null;
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();
Iif (ret instanceof Error) {
debug('parse error');
socket.destroy(ret);
return;
}
if (!self.httpAllowHalfOpen) {
abortIncoming();
if (socket.writable) socket.end();
} else Iif (outgoing.length) {
outgoing[outgoing.length - 1]._last = true;
} else Iif (socket._httpMessage) {
socket._httpMessage._last = true;
} else {
Eif (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.
Iif (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);
;
;
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._readableState.resumeScheduled)
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 (req.headers.expect !== undefined &&
(req.httpVersionMajor == 1 && req.httpVersionMinor == 1) &&
continueExpression.test(req.headers['expect'])) {
res._expect_continue = true;
Eif (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;
}());
|