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| // Public API
// ==========
// The main governing power behind the http2 API design is that it should look very similar to the
// existing node.js [HTTPS API][1] (which is, in turn, almost identical to the [HTTP API][2]). The
// additional features of HTTP/2 are exposed as extensions to this API. Furthermore, node-http2
// should fall back to using HTTP/1.1 if needed. Compatibility with undocumented or deprecated
// elements of the node.js HTTP/HTTPS API is a non-goal.
//
// Additional and modified API elements
// ------------------------------------
//
// - **Class: http2.Endpoint**: an API for using the raw HTTP/2 framing layer. For documentation
// see the [lib/endpoint.js](endpoint.html) file.
//
// - **Class: http2.Server**
// - **Event: 'connection' (socket, [endpoint])**: there's a second argument if the negotiation of
// HTTP/2 was successful: the reference to the [Endpoint](endpoint.html) object tied to the
// socket.
//
// - **http2.createServer(options, [requestListener])**: additional option:
// - **log**: an optional [bunyan](https://github.com/trentm/node-bunyan) logger object
// - **plain**: if `true`, the server will accept HTTP/2 connections over plain TCP instead of
// TLS
//
// - **Class: http2.ServerResponse**
// - **response.push(options)**: initiates a server push. `options` describes the 'imaginary'
// request to which the push stream is a response; the possible options are identical to the
// ones accepted by `http2.request`. Returns a ServerResponse object that can be used to send
// the response headers and content.
//
// - **Class: http2.Agent**
// - **new Agent(options)**: additional option:
// - **log**: an optional [bunyan](https://github.com/trentm/node-bunyan) logger object
// - **agent.sockets**: only contains TCP sockets that corresponds to HTTP/1 requests.
// - **agent.endpoints**: contains [Endpoint](endpoint.html) objects for HTTP/2 connections.
//
// - **http2.request(options, [callback])**: additional option:
// - **plain**: if `true`, the client will not try to build a TLS tunnel, instead it will use
// the raw TCP stream for HTTP/2
//
// - **Class: http2.ClientRequest**
// - **Event: 'socket' (socket)**: in case of an HTTP/2 incoming message, `socket` is a reference
// to the associated [HTTP/2 Stream](stream.html) object (and not to the TCP socket).
// - **Event: 'push' (promise)**: signals the intention of a server push associated to this
// request. `promise` is an IncomingPromise. If there's no listener for this event, the server
// push is cancelled.
// - **request.setPriority(priority)**: assign a priority to this request. `priority` is a number
// between 0 (highest priority) and 2^31-1 (lowest priority). Default value is 2^30.
//
// - **Class: http2.IncomingMessage**
// - has two subclasses for easier interface description: **IncomingRequest** and
// **IncomingResponse**
// - **message.socket**: in case of an HTTP/2 incoming message, it's a reference to the associated
// [HTTP/2 Stream](stream.html) object (and not to the TCP socket).
//
// - **Class: http2.IncomingRequest (IncomingMessage)**
// - **message.url**: in case of an HTTP/2 incoming request, the `url` field always contains the
// path, and never a full url (it contains the path in most cases in the HTTPS api as well).
// - **message.scheme**: additional field. Mandatory HTTP/2 request metadata.
// - **message.host**: additional field. Mandatory HTTP/2 request metadata. Note that this
// replaces the old Host header field, but node-http2 will add Host to the `message.headers` for
// backwards compatibility.
//
// - **Class: http2.IncomingPromise (IncomingRequest)**
// - contains the metadata of the 'imaginary' request to which the server push is an answer.
// - **Event: 'response' (response)**: signals the arrival of the actual push stream. `response`
// is an IncomingResponse.
// - **Event: 'push' (promise)**: signals the intention of a server push associated to this
// request. `promise` is an IncomingPromise. If there's no listener for this event, the server
// push is cancelled.
// - **promise.cancel()**: cancels the promised server push.
// - **promise.setPriority(priority)**: assign a priority to this push stream. `priority` is a
// number between 0 (highest priority) and 2^31-1 (lowest priority). Default value is 2^30.
//
// API elements not yet implemented
// --------------------------------
//
// - **Class: http2.Server**
// - **server.maxHeadersCount**
//
// API elements that are not applicable to HTTP/2
// ----------------------------------------------
//
// The reason may be deprecation of certain HTTP/1.1 features, or that some API elements simply
// don't make sense when using HTTP/2. These will not be present when a request is done with HTTP/2,
// but will function normally when falling back to using HTTP/1.1.
//
// - **Class: http2.Server**
// - **Event: 'checkContinue'**: not in the spec, yet (see [http-spec#18][expect-continue])
// - **Event: 'upgrade'**: upgrade is deprecated in HTTP/2
// - **Event: 'timeout'**: HTTP/2 sockets won't timeout because of application level keepalive
// (PING frames)
// - **Event: 'connect'**: not in the spec, yet (see [http-spec#230][connect])
// - **server.setTimeout(msecs, [callback])**
// - **server.timeout**
//
// - **Class: http2.ServerResponse**
// - **Event: 'close'**
// - **Event: 'timeout'**
// - **response.writeContinue()**
// - **response.writeHead(statusCode, [reasonPhrase], [headers])**: reasonPhrase will always be
// ignored since [it's not supported in HTTP/2][3]
// - **response.setTimeout(timeout, [callback])**
//
// - **Class: http2.Agent**
// - **agent.maxSockets**: only affects HTTP/1 connection pool. When using HTTP/2, there's always
// one connection per host.
//
// - **Class: http2.ClientRequest**
// - **Event: 'upgrade'**
// - **Event: 'connect'**
// - **Event: 'continue'**
// - **request.setTimeout(timeout, [callback])**
// - **request.setNoDelay([noDelay])**
// - **request.setSocketKeepAlive([enable], [initialDelay])**
//
// - **Class: http2.IncomingMessage**
// - **Event: 'close'**
// - **message.setTimeout(timeout, [callback])**
//
// [1]: http://nodejs.org/api/https.html
// [2]: http://nodejs.org/api/http.html
// [3]: http://tools.ietf.org/html/draft-ietf-httpbis-http2-11#section-8.1.3.2
// [expect-continue]: https://github.com/http2/http2-spec/issues/18
// [connect]: https://github.com/http2/http2-spec/issues/230
// Common server and client side code
// ==================================
var net = require('net');
var url = require('url');
var util = require('util');
var EventEmitter = require('events').EventEmitter;
var PassThrough = require('stream').PassThrough;
var Readable = require('stream').Readable;
var Writable = require('stream').Writable;
var Endpoint = require('http2-protocol').Endpoint;
var implementedVersion = require('http2-protocol').ImplementedVersion;
var http = require('http');
var https = require('https');
exports.STATUS_CODES = http.STATUS_CODES;
exports.IncomingMessage = IncomingMessage;
exports.OutgoingMessage = OutgoingMessage;
var deprecatedHeaders = [
'connection',
'host',
'keep-alive',
'proxy-connection',
'te',
'transfer-encoding',
'upgrade'
];
// When doing NPN/ALPN negotiation, HTTP/1.1 is used as fallback
var supportedProtocols = [implementedVersion, 'http/1.1', 'http/1.0'];
// Logging
// -------
// Logger shim, used when no logger is provided by the user.
function noop() {}
var defaultLogger = {
fatal: noop,
error: noop,
warn : noop,
info : noop,
debug: noop,
trace: noop,
child: function() { return this; }
};
// Bunyan serializers exported by submodules that are worth adding when creating a logger.
exports.serializers = require('http2-protocol').serializers;
// IncomingMessage class
// ---------------------
function IncomingMessage(stream) {
// * This is basically a read-only wrapper for the [Stream](stream.html) class.
PassThrough.call(this);
stream.pipe(this);
this.socket = this.stream = stream;
this._log = stream._log.child({ component: 'http' });
// * HTTP/2.0 does not define a way to carry the version identifier that is included in the
// HTTP/1.1 request/status line. Version is always 2.0.
this.httpVersion = '2.0';
this.httpVersionMajor = 2;
this.httpVersionMinor = 0;
// * `this.headers` will store the regular headers (and none of the special colon headers)
this.headers = {};
this.trailers = undefined;
this._lastHeadersSeen = undefined;
// * Other metadata is filled in when the headers arrive.
stream.once('headers', this._onHeaders.bind(this));
stream.once('end', this._onEnd.bind(this));
}
IncomingMessage.prototype = Object.create(PassThrough.prototype, { constructor: { value: IncomingMessage } });
// [Request Header Fields](http://tools.ietf.org/html/draft-ietf-httpbis-http2-11#section-8.1.3.1)
// * `headers` argument: HTTP/2.0 request and response header fields carry information as a series
// of key-value pairs. This includes the target URI for the request, the status code for the
// response, as well as HTTP header fields.
IncomingMessage.prototype._onHeaders = function _onHeaders(headers) {
// * Detects malformed headers
this._validateHeaders(headers);
// * Store the _regular_ headers in `this.headers`
for (var name in headers) {
if (name[0] !== ':') {
this.headers[name] = headers[name];
}
}
// * The last header block, if it's not the first, will represent the trailers
var self = this;
this.stream.on('headers', function(headers) {
self._lastHeadersSeen = headers;
});
};
IncomingMessage.prototype._onEnd = function _onEnd() {
this.trailers = this._lastHeadersSeen;
};
IncomingMessage.prototype.setTimeout = noop;
IncomingMessage.prototype._checkSpecialHeader = function _checkSpecialHeader(key, value) {
Iif ((typeof value !== 'string') || (value.length === 0)) {
this._log.error({ key: key, value: value }, 'Invalid or missing special header field');
this.stream.reset('PROTOCOL_ERROR');
}
return value;
};
IncomingMessage.prototype._validateHeaders = function _validateHeaders(headers) {
// * An HTTP/2.0 request or response MUST NOT include any of the following header fields:
// Connection, Host, Keep-Alive, Proxy-Connection, TE, Transfer-Encoding, and Upgrade. A server
// MUST treat the presence of any of these header fields as a stream error of type
// PROTOCOL_ERROR.
for (var i = 0; i < deprecatedHeaders.length; i++) {
var key = deprecatedHeaders[i];
Iif (key in headers) {
this._log.error({ key: key, value: headers[key] }, 'Deprecated header found');
this.stream.reset('PROTOCOL_ERROR');
return;
}
}
for (var headerName in headers) {
// * Empty header name field is malformed
Iif (headerName.length <= 1) {
this.stream.reset('PROTOCOL_ERROR');
return;
}
// * A request or response containing uppercase header name field names MUST be
// treated as malformed (Section 8.1.3.5). Implementations that detect malformed
// requests or responses need to ensure that the stream ends.
Iif(/[A-Z]/.test(headerName)) {
this.stream.reset('PROTOCOL_ERROR');
return;
}
}
};
// OutgoingMessage class
// ---------------------
function OutgoingMessage() {
// * This is basically a read-only wrapper for the [Stream](stream.html) class.
Writable.call(this);
this._headers = {};
this._trailers = undefined;
this.headersSent = false;
this.on('finish', this._finish);
}
OutgoingMessage.prototype = Object.create(Writable.prototype, { constructor: { value: OutgoingMessage } });
OutgoingMessage.prototype._write = function _write(chunk, encoding, callback) {
if (this.stream) {
this.stream.write(chunk, encoding, callback);
} else {
this.once('socket', this._write.bind(this, chunk, encoding, callback));
}
};
OutgoingMessage.prototype._finish = function _finish() {
if (this.stream) {
if (this._trailers) {
Iif (this.request) {
this.request.addTrailers(this._trailers);
} else {
this.stream.headers(this._trailers);
}
}
this.stream.end();
} else {
this.once('socket', this._finish.bind(this));
}
};
OutgoingMessage.prototype.setHeader = function setHeader(name, value) {
Iif (this.headersSent) {
throw new Error('Can\'t set headers after they are sent.');
} else {
name = name.toLowerCase();
Iif (deprecatedHeaders.indexOf(name) !== -1) {
throw new Error('Cannot set deprecated header: ' + name);
}
this._headers[name] = value;
}
};
OutgoingMessage.prototype.removeHeader = function removeHeader(name) {
Iif (this.headersSent) {
throw new Error('Can\'t remove headers after they are sent.');
} else {
delete this._headers[name.toLowerCase()];
}
};
OutgoingMessage.prototype.getHeader = function getHeader(name) {
return this._headers[name.toLowerCase()];
};
OutgoingMessage.prototype.addTrailers = function addTrailers(trailers) {
this._trailers = trailers;
};
OutgoingMessage.prototype.setTimeout = noop;
OutgoingMessage.prototype._checkSpecialHeader = IncomingMessage.prototype._checkSpecialHeader;
// Server side
// ===========
exports.createServer = createServer;
exports.Server = Server;
exports.IncomingRequest = IncomingRequest;
exports.OutgoingResponse = OutgoingResponse;
exports.ServerResponse = OutgoingResponse; // for API compatibility
// Server class
// ------------
function Server(options) {
options = util._extend({}, options);
this._log = (options.log || defaultLogger).child({ component: 'http' });
this._settings = options.settings;
var start = this._start.bind(this);
var fallback = this._fallback.bind(this);
// HTTP2 over TLS (using NPN or ALPN)
if ((options.key && options.cert) || options.pfx) {
this._log.info('Creating HTTP/2 server over TLS');
this._mode = 'tls';
options.ALPNProtocols = supportedProtocols;
options.NPNProtocols = supportedProtocols;
this._server = https.createServer(options);
this._originalSocketListeners = this._server.listeners('secureConnection');
this._server.removeAllListeners('secureConnection');
this._server.on('secureConnection', function(socket) {
var negotiatedProtocol = socket.alpnProtocol || socket.npnProtocol;
if ((negotiatedProtocol === implementedVersion) && socket.servername) {
start(socket);
} else {
fallback(socket);
}
});
this._server.on('request', this.emit.bind(this, 'request'));
}
// HTTP2 over plain TCP
else if (options.plain) {
this._log.info('Creating HTTP/2 server over plain TCP');
this._mode = 'plain';
this._server = net.createServer(start);
}
// HTTP/2 with HTTP/1.1 upgrade
else {
this._log.error('Trying to create HTTP/2 server with Upgrade from HTTP/1.1');
throw new Error('HTTP1.1 -> HTTP2 upgrade is not yet supported. Please provide TLS keys.');
}
this._server.on('close', this.emit.bind(this, 'close'));
}
Server.prototype = Object.create(EventEmitter.prototype, { constructor: { value: Server } });
// Starting HTTP/2
Server.prototype._start = function _start(socket) {
var endpoint = new Endpoint(this._log, 'SERVER', this._settings);
this._log.info({ e: endpoint,
client: socket.remoteAddress + ':' + socket.remotePort,
SNI: socket.servername
}, 'New incoming HTTP/2 connection');
endpoint.pipe(socket).pipe(endpoint);
var self = this;
endpoint.on('stream', function _onStream(stream) {
var response = new OutgoingResponse(stream);
var request = new IncomingRequest(stream);
request.once('ready', self.emit.bind(self, 'request', request, response));
});
endpoint.on('error', this.emit.bind(this, 'clientError'));
socket.on('error', this.emit.bind(this, 'clientError'));
this.emit('connection', socket, endpoint);
};
Server.prototype._fallback = function _fallback(socket) {
var negotiatedProtocol = socket.alpnProtocol || socket.npnProtocol;
this._log.info({ client: socket.remoteAddress + ':' + socket.remotePort,
protocol: negotiatedProtocol,
SNI: socket.servername
}, 'Falling back to simple HTTPS');
for (var i = 0; i < this._originalSocketListeners.length; i++) {
this._originalSocketListeners[i].call(this._server, socket);
}
this.emit('connection', socket);
};
// There are [3 possible signatures][1] of the `listen` function. Every arguments is forwarded to
// the backing TCP or HTTPS server.
// [1]: http://nodejs.org/api/http.html#http_server_listen_port_hostname_backlog_callback
Server.prototype.listen = function listen(port, hostname) {
this._log.info({ on: ((typeof hostname === 'string') ? (hostname + ':' + port) : port) },
'Listening for incoming connections');
this._server.listen.apply(this._server, arguments);
};
Server.prototype.close = function close(callback) {
this._log.info('Closing server');
this._server.close(callback);
};
Server.prototype.setTimeout = function setTimeout(timeout, callback) {
Eif (this._mode === 'tls') {
this._server.setTimeout(timeout, callback);
}
};
Object.defineProperty(Server.prototype, 'timeout', {
get: function getTimeout() {
Eif (this._mode === 'tls') {
return this._server.timeout;
} else {
return undefined;
}
},
set: function setTimeout(timeout) {
Eif (this._mode === 'tls') {
this._server.timeout = timeout;
}
}
});
// Overriding `EventEmitter`'s `on(event, listener)` method to forward certain subscriptions to
// `server`.There are events on the `http.Server` class where it makes difference whether someone is
// listening on the event or not. In these cases, we can not simply forward the events from the
// `server` to `this` since that means a listener. Instead, we forward the subscriptions.
Server.prototype.on = function on(event, listener) {
Iif ((event === 'upgrade') || (event === 'timeout')) {
this._server.on(event, listener && listener.bind(this));
} else {
EventEmitter.prototype.on.call(this, event, listener);
}
};
// `addContext` is used to add Server Name Indication contexts
Server.prototype.addContext = function addContext(hostname, credentials) {
if (this._mode === 'tls') {
this._server.addContext(hostname, credentials);
}
};
function createServer(options, requestListener) {
if (typeof options === 'function') {
requestListener = options;
options = undefined;
}
var server = new Server(options);
Eif (requestListener) {
server.on('request', requestListener);
}
return server;
}
// IncomingRequest class
// ---------------------
function IncomingRequest(stream) {
IncomingMessage.call(this, stream);
}
IncomingRequest.prototype = Object.create(IncomingMessage.prototype, { constructor: { value: IncomingRequest } });
// [Request Header Fields](http://tools.ietf.org/html/draft-ietf-httpbis-http2-11#section-8.1.3.1)
// * `headers` argument: HTTP/2.0 request and response header fields carry information as a series
// of key-value pairs. This includes the target URI for the request, the status code for the
// response, as well as HTTP header fields.
IncomingRequest.prototype._onHeaders = function _onHeaders(headers) {
// * The ":method" header field includes the HTTP method
// * The ":scheme" header field includes the scheme portion of the target URI
// * The ":authority" header field includes the authority portion of the target URI
// * The ":path" header field includes the path and query parts of the target URI.
// This field MUST NOT be empty; URIs that do not contain a path component MUST include a value
// of '/', unless the request is an OPTIONS request for '*', in which case the ":path" header
// field MUST include '*'.
// * All HTTP/2.0 requests MUST include exactly one valid value for all of these header fields. A
// server MUST treat the absence of any of these header fields, presence of multiple values, or
// an invalid value as a stream error of type PROTOCOL_ERROR.
this.method = this._checkSpecialHeader(':method' , headers[':method']);
this.scheme = this._checkSpecialHeader(':scheme' , headers[':scheme']);
this.host = this._checkSpecialHeader(':authority', headers[':authority'] );
this.url = this._checkSpecialHeader(':path' , headers[':path'] );
// * Host header is included in the headers object for backwards compatibility.
this.headers.host = this.host;
// * Handling regular headers.
IncomingMessage.prototype._onHeaders.call(this, headers);
// * Signaling that the headers arrived.
this._log.info({ method: this.method, scheme: this.scheme, host: this.host,
path: this.url, headers: this.headers }, 'Incoming request');
this.emit('ready');
};
// OutgoingResponse class
// ----------------------
function OutgoingResponse(stream) {
OutgoingMessage.call(this);
this._log = stream._log.child({ component: 'http' });
this.stream = stream;
this.statusCode = 200;
this.sendDate = true;
this.stream.once('headers', this._onRequestHeaders.bind(this));
}
OutgoingResponse.prototype = Object.create(OutgoingMessage.prototype, { constructor: { value: OutgoingResponse } });
OutgoingResponse.prototype.writeHead = function writeHead(statusCode, reasonPhrase, headers) {
if (typeof reasonPhrase === 'string') {
this._log.warn('Reason phrase argument was present but ignored by the writeHead method');
} else {
headers = reasonPhrase;
}
for (var name in headers) {
this.setHeader(name, headers[name]);
}
headers = this._headers;
if (this.sendDate && !('date' in this._headers)) {
headers.date = (new Date()).toUTCString();
}
this._log.info({ status: statusCode, headers: this._headers }, 'Sending server response');
headers[':status'] = this.statusCode = statusCode;
this.stream.headers(headers);
this.headersSent = true;
};
OutgoingResponse.prototype._implicitHeaders = function _implicitHeaders() {
if (!this.headersSent) {
this.writeHead(this.statusCode);
}
};
OutgoingResponse.prototype.write = function write() {
this._implicitHeaders();
return OutgoingMessage.prototype.write.apply(this, arguments);
};
OutgoingResponse.prototype.end = function end() {
this._implicitHeaders();
return OutgoingMessage.prototype.end.apply(this, arguments);
};
OutgoingResponse.prototype._onRequestHeaders = function _onRequestHeaders(headers) {
this._requestHeaders = headers;
};
OutgoingResponse.prototype.push = function push(options) {
if (typeof options === 'string') {
options = url.parse(options);
}
Iif (!options.path) {
throw new Error('`path` option is mandatory.');
}
var promise = util._extend({
':method': (options.method || 'GET').toUpperCase(),
':scheme': (options.protocol && options.protocol.slice(0, -1)) || this._requestHeaders[':scheme'],
':authority': options.hostname || options.host || this._requestHeaders[':authority'],
':path': options.path
}, options.headers);
this._log.info({ method: promise[':method'], scheme: promise[':scheme'],
authority: promise[':authority'], path: promise[':path'],
headers: options.headers }, 'Promising push stream');
var pushStream = this.stream.promise(promise);
return new OutgoingResponse(pushStream);
};
// Overriding `EventEmitter`'s `on(event, listener)` method to forward certain subscriptions to
// `request`. See `Server.prototype.on` for explanation.
OutgoingResponse.prototype.on = function on(event, listener) {
Iif (this.request && (event === 'timeout')) {
this.request.on(event, listener && listener.bind(this));
} else {
OutgoingMessage.prototype.on.call(this, event, listener);
}
};
// Client side
// ===========
exports.ClientRequest = OutgoingRequest; // for API compatibility
exports.OutgoingRequest = OutgoingRequest;
exports.IncomingResponse = IncomingResponse;
exports.Agent = Agent;
exports.globalAgent = undefined;
exports.request = function request(options, callback) {
return (options.agent || exports.globalAgent).request(options, callback);
};
exports.get = function get(options, callback) {
return (options.agent || exports.globalAgent).get(options, callback);
};
// Agent class
// -----------
function Agent(options) {
EventEmitter.call(this);
options = util._extend({}, options);
this._settings = options.settings;
this._log = (options.log || defaultLogger).child({ component: 'http' });
this.endpoints = {};
// * Using an own HTTPS agent, because the global agent does not look at `NPN/ALPNProtocols` when
// generating the key identifying the connection, so we may get useless non-negotiated TLS
// channels even if we ask for a negotiated one. This agent will contain only negotiated
// channels.
var agentOptions = {};
agentOptions.ALPNProtocols = supportedProtocols;
agentOptions.NPNProtocols = supportedProtocols;
this._httpsAgent = new https.Agent(agentOptions);
this.sockets = this._httpsAgent.sockets;
this.requests = this._httpsAgent.requests;
}
Agent.prototype = Object.create(EventEmitter.prototype, { constructor: { value: Agent } });
Agent.prototype.request = function request(options, callback) {
if (typeof options === 'string') {
options = url.parse(options);
} else {
options = util._extend({}, options);
}
options.method = (options.method || 'GET').toUpperCase();
options.protocol = options.protocol || 'https:';
options.host = options.hostname || options.host || 'localhost';
options.port = options.port || 443;
options.path = options.path || '/';
if (!options.plain && options.protocol === 'http:') {
this._log.error('Trying to negotiate client request with Upgrade from HTTP/1.1');
throw new Error('HTTP1.1 -> HTTP2 upgrade is not yet supported.');
}
var request = new OutgoingRequest(this._log);
if (callback) {
request.on('response', callback);
}
var key = [
!!options.plain,
options.host,
options.port
].join(':');
// * There's an existing HTTP/2 connection to this host
if (key in this.endpoints) {
var endpoint = this.endpoints[key];
request._start(endpoint.createStream(), options);
}
// * HTTP/2 over plain TCP
else if (options.plain) {
endpoint = new Endpoint(this._log, 'CLIENT', this._settings);
endpoint.socket = net.connect({
host: options.host,
port: options.port,
localAddress: options.localAddress
});
endpoint.pipe(endpoint.socket).pipe(endpoint);
request._start(endpoint.createStream(), options);
}
// * HTTP/2 over TLS negotiated using NPN or ALPN
else {
var started = false;
options.ALPNProtocols = supportedProtocols;
options.NPNProtocols = supportedProtocols;
options.servername = options.host; // Server Name Indication
options.agent = this._httpsAgent;
var httpsRequest = https.request(options);
httpsRequest.on('socket', function(socket) {
var negotiatedProtocol = socket.alpnProtocol || socket.npnProtocol;
Iif (negotiatedProtocol !== undefined) {
negotiated();
} else {
socket.on('secureConnect', negotiated);
}
});
var self = this;
function negotiated() {
var endpoint;
var negotiatedProtocol = httpsRequest.socket.alpnProtocol || httpsRequest.socket.npnProtocol;
if (negotiatedProtocol === implementedVersion) {
httpsRequest.socket.emit('agentRemove');
unbundleSocket(httpsRequest.socket);
endpoint = new Endpoint(self._log, 'CLIENT', self._settings);
endpoint.socket = httpsRequest.socket;
endpoint.pipe(endpoint.socket).pipe(endpoint);
}
if (started) {
Eif (endpoint) {
endpoint.close();
} else {
httpsRequest.abort();
}
} else {
if (endpoint) {
self._log.info({ e: endpoint, server: options.host + ':' + options.port },
'New outgoing HTTP/2 connection');
self.endpoints[key] = endpoint;
self.emit(key, endpoint);
} else {
self.emit(key, undefined);
}
}
}
this.once(key, function(endpoint) {
started = true;
if (endpoint) {
request._start(endpoint.createStream(), options);
} else {
request._fallback(httpsRequest);
}
});
}
return request;
};
Agent.prototype.get = function get(options, callback) {
var request = this.request(options, callback);
request.end();
return request;
};
function unbundleSocket(socket) {
socket.removeAllListeners('data');
socket.removeAllListeners('end');
socket.removeAllListeners('readable');
socket.removeAllListeners('close');
socket.removeAllListeners('error');
socket.unpipe();
delete socket.ondata;
delete socket.onend;
}
Object.defineProperty(Agent.prototype, 'maxSockets', {
get: function getMaxSockets() {
return this._httpsAgent.maxSockets;
},
set: function setMaxSockets(value) {
this._httpsAgent.maxSockets = value;
}
});
exports.globalAgent = new Agent();
// OutgoingRequest class
// ---------------------
function OutgoingRequest() {
OutgoingMessage.call(this);
this._log = undefined;
this.stream = undefined;
}
OutgoingRequest.prototype = Object.create(OutgoingMessage.prototype, { constructor: { value: OutgoingRequest } });
OutgoingRequest.prototype._start = function _start(stream, options) {
this.stream = stream;
this._log = stream._log.child({ component: 'http' });
for (var key in options.headers) {
this.setHeader(key, options.headers[key]);
}
var headers = this._headers;
delete headers.host;
Iif (options.auth) {
headers.authorization = 'Basic ' + new Buffer(options.auth).toString('base64');
}
headers[':scheme'] = options.protocol.slice(0, -1);
headers[':method'] = options.method;
headers[':authority'] = options.host;
headers[':path'] = options.path;
this._log.info({ scheme: headers[':scheme'], method: headers[':method'],
authority: headers[':authority'], path: headers[':path'],
headers: (options.headers || {}) }, 'Sending request');
this.stream.headers(headers);
this.headersSent = true;
this.emit('socket', this.stream);
var response = new IncomingResponse(this.stream);
response.once('ready', this.emit.bind(this, 'response', response));
this.stream.on('promise', this._onPromise.bind(this));
};
OutgoingRequest.prototype._fallback = function _fallback(request) {
request.on('response', this.emit.bind(this, 'response'));
this.stream = this.request = request;
this.emit('socket', this.socket);
};
OutgoingRequest.prototype.setPriority = function setPriority(priority) {
if (this.stream) {
this.stream.priority(priority);
} else {
this.once('socket', this.setPriority.bind(this, priority));
}
};
// Overriding `EventEmitter`'s `on(event, listener)` method to forward certain subscriptions to
// `request`. See `Server.prototype.on` for explanation.
OutgoingRequest.prototype.on = function on(event, listener) {
Iif (this.request && (event === 'upgrade')) {
this.request.on(event, listener && listener.bind(this));
} else {
OutgoingMessage.prototype.on.call(this, event, listener);
}
};
// Methods only in fallback mode
OutgoingRequest.prototype.setNoDelay = function setNoDelay(noDelay) {
if (this.request) {
this.request.setNoDelay(noDelay);
} else if (!this.stream) {
this.on('socket', this.setNoDelay.bind(this, noDelay));
}
};
OutgoingRequest.prototype.setSocketKeepAlive = function setSocketKeepAlive(enable, initialDelay) {
if (this.request) {
this.request.setSocketKeepAlive(enable, initialDelay);
} else if (!this.stream) {
this.on('socket', this.setSocketKeepAlive.bind(this, enable, initialDelay));
}
};
OutgoingRequest.prototype.setTimeout = function setTimeout(timeout, callback) {
if (this.request) {
this.request.setTimeout(timeout, callback);
} else if (!this.stream) {
this.on('socket', this.setTimeout.bind(this, timeout, callback));
}
};
// Aborting the request
OutgoingRequest.prototype.abort = function abort() {
if (this.request) {
this.request.abort();
} else if (this.stream) {
this.stream.reset('CANCEL');
} else {
this.on('socket', this.abort.bind(this));
}
};
// Receiving push promises
OutgoingRequest.prototype._onPromise = function _onPromise(stream, headers) {
this._log.info({ push_stream: stream.id }, 'Receiving push promise');
var promise = new IncomingPromise(stream, headers);
Eif (this.listeners('push').length > 0) {
this.emit('push', promise);
} else {
promise.cancel();
}
};
// IncomingResponse class
// ----------------------
function IncomingResponse(stream) {
IncomingMessage.call(this, stream);
}
IncomingResponse.prototype = Object.create(IncomingMessage.prototype, { constructor: { value: IncomingResponse } });
// [Response Header Fields](http://tools.ietf.org/html/draft-ietf-httpbis-http2-11#section-8.1.3.2)
// * `headers` argument: HTTP/2.0 request and response header fields carry information as a series
// of key-value pairs. This includes the target URI for the request, the status code for the
// response, as well as HTTP header fields.
IncomingResponse.prototype._onHeaders = function _onHeaders(headers) {
// * A single ":status" header field is defined that carries the HTTP status code field. This
// header field MUST be included in all responses.
// * A client MUST treat the absence of the ":status" header field, the presence of multiple
// values, or an invalid value as a stream error of type PROTOCOL_ERROR.
// Note: currently, we do not enforce it strictly: we accept any format, and parse it as int
// * HTTP/2.0 does not define a way to carry the reason phrase that is included in an HTTP/1.1
// status line.
this.statusCode = parseInt(this._checkSpecialHeader(':status', headers[':status']));
// * Handling regular headers.
IncomingMessage.prototype._onHeaders.call(this, headers);
// * Signaling that the headers arrived.
this._log.info({ status: this.statusCode, headers: this.headers}, 'Incoming response');
this.emit('ready');
};
// IncomingPromise class
// -------------------------
function IncomingPromise(responseStream, promiseHeaders) {
var stream = new Readable();
stream._read = noop;
stream.push(null);
stream._log = responseStream._log;
IncomingRequest.call(this, stream);
this._onHeaders(promiseHeaders);
this._responseStream = responseStream;
var response = new IncomingResponse(this._responseStream);
response.once('ready', this.emit.bind(this, 'response', response));
this.stream.on('promise', this._onPromise.bind(this));
}
IncomingPromise.prototype = Object.create(IncomingRequest.prototype, { constructor: { value: IncomingPromise } });
IncomingPromise.prototype.cancel = function cancel() {
this._responseStream.reset('CANCEL');
};
IncomingPromise.prototype.setPriority = function setPriority(priority) {
this._responseStream.priority(priority);
};
IncomingPromise.prototype._onPromise = OutgoingRequest.prototype._onPromise;
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