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core.js
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'use strict';
/* eslint-disable no-use-before-define */
require('internal/util').assertCrypto();
const { async_id_symbol } = process.binding('async_wrap');
const binding = process.binding('http2');
const assert = require('assert');
const { Buffer } = require('buffer');
const EventEmitter = require('events');
const net = require('net');
const tls = require('tls');
const util = require('util');
const fs = require('fs');
const errors = require('internal/errors');
const { StreamWrap } = require('_stream_wrap');
const { Duplex } = require('stream');
const { URL } = require('url');
const { onServerStream,
Http2ServerRequest,
Http2ServerResponse,
} = require('internal/http2/compat');
const { utcDate } = require('internal/http');
const { promisify } = require('internal/util');
const { isArrayBufferView } = require('internal/util/types');
const { _connectionListener: httpConnectionListener } = require('http');
const { createPromise, promiseResolve } = process.binding('util');
const debug = util.debuglog('http2');
const kMaxFrameSize = (2 ** 24) - 1;
const kMaxInt = (2 ** 32) - 1;
const kMaxStreams = (2 ** 31) - 1;
const {
assertIsObject,
assertValidPseudoHeaderResponse,
assertValidPseudoHeaderTrailer,
assertWithinRange,
getDefaultSettings,
getSessionState,
getSettings,
getStreamState,
isPayloadMeaningless,
kSocket,
mapToHeaders,
NghttpError,
sessionName,
toHeaderObject,
updateOptionsBuffer,
updateSettingsBuffer
} = require('internal/http2/util');
const {
_unrefActive,
enroll,
unenroll
} = require('timers');
const { ShutdownWrap, WriteWrap } = process.binding('stream_wrap');
const { constants } = binding;
const NETServer = net.Server;
const TLSServer = tls.Server;
const kInspect = require('internal/util').customInspectSymbol;
const kAuthority = Symbol('authority');
const kDestroySocket = Symbol('destroy-socket');
const kHandle = Symbol('handle');
const kID = Symbol('id');
const kInit = Symbol('init');
const kLocalSettings = Symbol('local-settings');
const kOptions = Symbol('options');
const kOwner = Symbol('owner');
const kProceed = Symbol('proceed');
const kProtocol = Symbol('protocol');
const kProxySocket = Symbol('proxy-socket');
const kRemoteSettings = Symbol('remote-settings');
const kServer = Symbol('server');
const kSession = Symbol('session');
const kState = Symbol('state');
const kType = Symbol('type');
const kUpdateTimer = Symbol('update-timer');
const kDefaultSocketTimeout = 2 * 60 * 1000;
const kRenegTest = /TLS session renegotiation disabled for this socket/;
const {
paddingBuffer,
PADDING_BUF_FRAME_LENGTH,
PADDING_BUF_MAX_PAYLOAD_LENGTH,
PADDING_BUF_RETURN_VALUE
} = binding;
const {
NGHTTP2_CANCEL,
NGHTTP2_DEFAULT_WEIGHT,
NGHTTP2_FLAG_END_STREAM,
NGHTTP2_HCAT_PUSH_RESPONSE,
NGHTTP2_HCAT_RESPONSE,
NGHTTP2_INTERNAL_ERROR,
NGHTTP2_NO_ERROR,
NGHTTP2_PROTOCOL_ERROR,
NGHTTP2_REFUSED_STREAM,
NGHTTP2_SESSION_CLIENT,
NGHTTP2_SESSION_SERVER,
NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE,
NGHTTP2_ERR_INVALID_ARGUMENT,
NGHTTP2_ERR_STREAM_CLOSED,
HTTP2_HEADER_AUTHORITY,
HTTP2_HEADER_DATE,
HTTP2_HEADER_METHOD,
HTTP2_HEADER_PATH,
HTTP2_HEADER_SCHEME,
HTTP2_HEADER_STATUS,
HTTP2_HEADER_CONTENT_LENGTH,
NGHTTP2_SETTINGS_HEADER_TABLE_SIZE,
NGHTTP2_SETTINGS_ENABLE_PUSH,
NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS,
NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE,
NGHTTP2_SETTINGS_MAX_FRAME_SIZE,
NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
HTTP2_METHOD_GET,
HTTP2_METHOD_HEAD,
HTTP2_METHOD_CONNECT,
HTTP_STATUS_CONTINUE,
HTTP_STATUS_RESET_CONTENT,
HTTP_STATUS_OK,
HTTP_STATUS_NO_CONTENT,
HTTP_STATUS_NOT_MODIFIED,
HTTP_STATUS_SWITCHING_PROTOCOLS,
STREAM_OPTION_EMPTY_PAYLOAD,
STREAM_OPTION_GET_TRAILERS
} = constants;
// Top level to avoid creating a closure
function emit(self, ...args) {
self.emit(...args);
}
// Called when a new block of headers has been received for a given
// stream. The stream may or may not be new. If the stream is new,
// create the associated Http2Stream instance and emit the 'stream'
// event. If the stream is not new, emit the 'headers' event to pass
// the block of headers on.
function onSessionHeaders(handle, id, cat, flags, headers) {
const owner = this[kOwner];
const type = owner[kType];
owner[kUpdateTimer]();
debug(`Http2Stream ${id} [Http2Session ` +
`${sessionName(type)}]: headers received`);
const streams = owner[kState].streams;
const endOfStream = !!(flags & NGHTTP2_FLAG_END_STREAM);
let stream = streams.get(id);
// Convert the array of header name value pairs into an object
const obj = toHeaderObject(headers);
if (stream === undefined) {
const opts = { readable: !endOfStream };
// owner[kType] can be only one of two possible values
if (type === NGHTTP2_SESSION_SERVER) {
stream = new ServerHttp2Stream(owner, handle, id, opts, obj);
if (obj[HTTP2_HEADER_METHOD] === HTTP2_METHOD_HEAD) {
// For head requests, there must not be a body...
// end the writable side immediately.
stream.end();
stream[kState].headRequest = true;
}
} else {
stream = new ClientHttp2Stream(owner, handle, id, opts);
}
streams.set(id, stream);
process.nextTick(emit, owner, 'stream', stream, obj, flags, headers);
} else {
let event;
const status = obj[HTTP2_HEADER_STATUS];
if (cat === NGHTTP2_HCAT_RESPONSE) {
if (!endOfStream &&
status !== undefined &&
status >= 100 &&
status < 200) {
event = 'headers';
} else {
event = 'response';
}
} else if (cat === NGHTTP2_HCAT_PUSH_RESPONSE) {
event = 'push';
// cat === NGHTTP2_HCAT_HEADERS:
} else if (!endOfStream && status !== undefined && status >= 200) {
event = 'response';
} else {
event = endOfStream ? 'trailers' : 'headers';
}
debug(`Http2Stream ${id} [Http2Session ` +
`${sessionName(type)}]: emitting stream '${event}' event`);
process.nextTick(emit, stream, event, obj, flags, headers);
}
if (endOfStream) {
stream.push(null);
}
}
// Called to determine if there are trailers to be sent at the end of a
// Stream. The 'getTrailers' callback is invoked and passed a holder object.
// The trailers to return are set on that object by the handler. Once the
// event handler returns, those are sent off for processing. Note that this
// is a necessarily synchronous operation. We need to know immediately if
// there are trailing headers to send.
function onStreamTrailers() {
const stream = this[kOwner];
const trailers = Object.create(null);
stream[kState].getTrailers.call(stream, trailers);
const headersList = mapToHeaders(trailers, assertValidPseudoHeaderTrailer);
if (!Array.isArray(headersList)) {
process.nextTick(emit, stream, 'error', headersList);
return;
}
return headersList;
}
// Called when the stream is closed. The streamClosed event is emitted on the
// Http2Stream instance. Note that this event is distinctly different than the
// require('stream') interface 'close' event which deals with the state of the
// Readable and Writable sides of the Duplex.
function onStreamClose(code) {
const stream = this[kOwner];
stream[kUpdateTimer]();
abort(stream);
const state = stream[kState];
state.rst = true;
state.rstCode = code;
if (state.fd !== undefined)
fs.close(state.fd, afterFDClose.bind(stream));
setImmediate(stream.destroy.bind(stream));
}
function afterFDClose(err) {
if (err)
process.nextTick(emit, this, 'error', err);
}
// Called when an error event needs to be triggered
function onSessionError(error) {
const owner = this[kOwner];
owner[kUpdateTimer]();
process.nextTick(emit, owner, 'error', error);
}
// Receives a chunk of data for a given stream and forwards it on
// to the Http2Stream Duplex for processing.
function onStreamRead(nread, buf, handle) {
const stream = handle[kOwner];
stream[kUpdateTimer]();
if (nread >= 0 && !stream.destroyed) {
if (!stream.push(buf)) {
handle.readStop();
}
return;
}
// Last chunk was received. End the readable side.
stream.push(null);
}
// Called when the remote peer settings have been updated.
// Resets the cached settings.
function onSettings(ack) {
const owner = this[kOwner];
debug(`Http2Session ${sessionName(owner[kType])}: new settings received`);
owner[kUpdateTimer]();
let event = 'remoteSettings';
if (ack) {
if (owner[kState].pendingAck > 0)
owner[kState].pendingAck--;
owner[kLocalSettings] = undefined;
event = 'localSettings';
} else {
owner[kRemoteSettings] = undefined;
}
// Only emit the event if there are listeners registered
if (owner.listenerCount(event) > 0)
process.nextTick(emit, owner, event, owner[event]);
}
// If the stream exists, an attempt will be made to emit an event
// on the stream object itself. Otherwise, forward it on to the
// session (which may, in turn, forward it on to the server)
function onPriority(id, parent, weight, exclusive) {
const owner = this[kOwner];
debug(`Http2Stream ${id} [Http2Session ` +
`${sessionName(owner[kType])}]: priority [parent: ${parent}, ` +
`weight: ${weight}, exclusive: ${exclusive}]`);
owner[kUpdateTimer]();
const streams = owner[kState].streams;
const stream = streams.get(id);
const emitter = stream === undefined ? owner : stream;
process.nextTick(emit, emitter, 'priority', id, parent, weight, exclusive);
}
function emitFrameError(self, id, type, code) {
if (!self.emit('frameError', type, code, id)) {
const err = new errors.Error('ERR_HTTP2_FRAME_ERROR', type, code, id);
err.errno = code;
self.emit('error', err);
}
}
// Called by the native layer when an error has occurred sending a
// frame. This should be exceedingly rare.
function onFrameError(id, type, code) {
const owner = this[kOwner];
debug(`Http2Session ${sessionName(owner[kType])}: error sending frame type ` +
`${type} on stream ${id}, code: ${code}`);
owner[kUpdateTimer]();
const streams = owner[kState].streams;
const stream = streams.get(id);
const emitter = stream !== undefined ? stream : owner;
process.nextTick(emitFrameError, emitter, id, type, code);
}
function emitGoaway(self, code, lastStreamID, buf) {
self.emit('goaway', code, lastStreamID, buf);
// Tear down the session or destroy
const state = self[kState];
if (state.destroying || state.destroyed)
return;
if (!state.shuttingDown && !state.shutdown) {
self.shutdown({}, self.destroy.bind(self));
return;
}
self.destroy();
}
// Called by the native layer when a goaway frame has been received
function onGoawayData(code, lastStreamID, buf) {
const owner = this[kOwner];
debug(`Http2Session ${sessionName(owner[kType])}: goaway ${code} received ` +
`[last stream id: ${lastStreamID}]`);
process.nextTick(emitGoaway, owner, code, lastStreamID, buf);
}
// Returns the padding to use per frame. The selectPadding callback is set
// on the options. It is invoked with two arguments, the frameLen, and the
// maxPayloadLen. The method must return a numeric value within the range
// frameLen <= n <= maxPayloadLen.
function onSelectPadding(fn) {
return function getPadding() {
const frameLen = paddingBuffer[PADDING_BUF_FRAME_LENGTH];
const maxFramePayloadLen = paddingBuffer[PADDING_BUF_MAX_PAYLOAD_LENGTH];
paddingBuffer[PADDING_BUF_RETURN_VALUE] =
Math.min(maxFramePayloadLen,
Math.max(frameLen,
fn(frameLen,
maxFramePayloadLen) | 0));
};
}
// When a ClientHttp2Session is first created, the socket may not yet be
// connected. If request() is called during this time, the actual request
// will be deferred until the socket is ready to go.
function requestOnConnect(headers, options) {
const session = this[kSession];
debug(`Http2Session ${sessionName(session[kType])}: connected, ` +
'initializing request');
const streams = session[kState].streams;
validatePriorityOptions(options);
const headersList = mapToHeaders(headers);
if (!Array.isArray(headersList)) {
process.nextTick(emit, this, 'error', headersList);
return;
}
let streamOptions = 0;
if (options.endStream)
streamOptions |= STREAM_OPTION_EMPTY_PAYLOAD;
if (typeof options.getTrailers === 'function') {
streamOptions |= STREAM_OPTION_GET_TRAILERS;
this[kState].getTrailers = options.getTrailers;
}
// ret will be either the reserved stream ID (if positive)
// or an error code (if negative)
const ret = session[kHandle].request(headersList,
streamOptions,
options.parent | 0,
options.weight | 0,
!!options.exclusive);
// In an error condition, one of three possible response codes will be
// possible:
// * NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE - Maximum stream ID is reached, this
// is fatal for the session
// * NGHTTP2_ERR_INVALID_ARGUMENT - Stream was made dependent on itself, this
// impacts on this stream.
// For the first two, emit the error on the session,
// For the third, emit the error on the stream, it will bubble up to the
// session if not handled.
if (typeof ret === 'number') {
let err;
let target = session;
switch (ret) {
case NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE:
err = new errors.Error('ERR_HTTP2_OUT_OF_STREAMS');
target = this;
break;
case NGHTTP2_ERR_INVALID_ARGUMENT:
err = new errors.Error('ERR_HTTP2_STREAM_SELF_DEPENDENCY');
target = this;
break;
default:
err = new NghttpError(ret);
}
process.nextTick(emit, target, 'error', err);
return;
}
const id = ret.id();
streams.set(id, this);
this[kInit](id, ret);
}
function validatePriorityOptions(options) {
if (options.weight === undefined) {
options.weight = NGHTTP2_DEFAULT_WEIGHT;
} else if (typeof options.weight !== 'number') {
const err = new errors.TypeError('ERR_INVALID_OPT_VALUE',
'weight',
options.weight);
Error.captureStackTrace(err, validatePriorityOptions);
throw err;
}
if (options.parent === undefined) {
options.parent = 0;
} else if (typeof options.parent !== 'number' || options.parent < 0) {
const err = new errors.TypeError('ERR_INVALID_OPT_VALUE',
'parent',
options.parent);
Error.captureStackTrace(err, validatePriorityOptions);
throw err;
}
if (options.exclusive === undefined) {
options.exclusive = false;
} else if (typeof options.exclusive !== 'boolean') {
const err = new errors.TypeError('ERR_INVALID_OPT_VALUE',
'exclusive',
options.exclusive);
Error.captureStackTrace(err, validatePriorityOptions);
throw err;
}
if (options.silent === undefined) {
options.silent = false;
} else if (typeof options.silent !== 'boolean') {
const err = new errors.TypeError('ERR_INVALID_OPT_VALUE',
'silent',
options.silent);
Error.captureStackTrace(err, validatePriorityOptions);
throw err;
}
}
function onSessionInternalError(code) {
const owner = this[kOwner];
const err = new NghttpError(code);
process.nextTick(emit, owner, 'error', err);
}
// Creates the internal binding.Http2Session handle for an Http2Session
// instance. This occurs only after the socket connection has been
// established. Note: the binding.Http2Session will take over ownership
// of the socket. No other code should read from or write to the socket.
function setupHandle(session, socket, type, options) {
return function() {
debug(`Http2Session ${sessionName(type)}: setting up session handle`);
session[kState].connecting = false;
updateOptionsBuffer(options);
const handle = new binding.Http2Session(type);
handle[kOwner] = session;
handle.error = onSessionInternalError;
handle.onpriority = onPriority;
handle.onsettings = onSettings;
handle.onheaders = onSessionHeaders;
handle.onerror = onSessionError;
handle.onframeerror = onFrameError;
handle.ongoawaydata = onGoawayData;
if (typeof options.selectPadding === 'function')
handle.ongetpadding = onSelectPadding(options.selectPadding);
assert(socket._handle !== undefined,
'Internal HTTP/2 Failure. The socket is not connected. Please ' +
'report this as a bug in Node.js');
handle.consume(socket._handle._externalStream);
session[kHandle] = handle;
const settings = typeof options.settings === 'object' ?
options.settings : Object.create(null);
session.settings(settings);
process.nextTick(emit, session, 'connect', session, socket);
};
}
// Submits a SETTINGS frame to be sent to the remote peer.
function submitSettings(settings) {
const type = this[kType];
debug(`Http2Session ${sessionName(type)}: submitting settings`);
this[kUpdateTimer]();
this[kLocalSettings] = undefined;
updateSettingsBuffer(settings);
this[kHandle].settings();
}
// Submits a PRIORITY frame to be sent to the remote peer
// Note: If the silent option is true, the change will be made
// locally with no PRIORITY frame sent.
function submitPriority(options) {
this[kUpdateTimer]();
// If the parent is the id, do nothing because a
// stream cannot be made to depend on itself.
if (options.parent === this[kID])
return;
this[kHandle].priority(options.parent | 0,
options.weight | 0,
!!options.exclusive,
!!options.silent);
}
// Submit an RST-STREAM frame to be sent to the remote peer.
// This will cause the Http2Stream to be closed.
function submitRstStream(code) {
this[kUpdateTimer]();
const state = this[kState];
if (state.rst) return;
state.rst = true;
state.rstCode = code;
const ret = this[kHandle].rstStream(code);
if (ret < 0) {
const err = new NghttpError(ret);
process.nextTick(emit, this, 'error', err);
return;
}
this.destroy();
}
function doShutdown(options) {
const handle = this[kHandle];
const state = this[kState];
if (handle === undefined || state.shutdown)
return; // Nothing to do, possibly because the session shutdown already.
const ret = handle.goaway(options.errorCode | 0,
options.lastStreamID | 0,
options.opaqueData);
state.shuttingDown = false;
state.shutdown = true;
if (ret < 0) {
debug(`Http2Session ${sessionName(this[kType])}: shutdown failed`);
const err = new NghttpError(ret);
process.nextTick(emit, this, 'error', err);
return;
}
process.nextTick(emit, this, 'shutdown', options);
}
// Submit a graceful or immediate shutdown request for the Http2Session.
function submitShutdown(options) {
const type = this[kType];
debug(`Http2Session ${sessionName(type)}: submitting shutdown request`);
const fn = doShutdown.bind(this, options);
if (type === NGHTTP2_SESSION_SERVER && options.graceful === true) {
// first send a shutdown notice
this[kHandle].shutdownNotice();
// then, on flip of the event loop, do the actual shutdown
setImmediate(fn);
return;
}
fn();
}
function finishSessionDestroy(socket) {
if (!socket.destroyed)
socket.destroy();
const state = this[kState];
state.destroying = false;
state.destroyed = true;
// Destroy the handle
if (this[kHandle] !== undefined) {
this[kHandle].destroy(state.skipUnconsume);
this[kHandle] = undefined;
}
process.nextTick(emit, this, 'close');
}
const proxySocketHandler = {
get(session, prop) {
switch (prop) {
case 'setTimeout':
return session.setTimeout.bind(session);
case 'destroy':
case 'emit':
case 'end':
case 'pause':
case 'read':
case 'resume':
case 'write':
throw new errors.Error('ERR_HTTP2_NO_SOCKET_MANIPULATION');
default:
const socket = session[kSocket];
const value = socket[prop];
return typeof value === 'function' ? value.bind(socket) : value;
}
},
getPrototypeOf(session) {
return Reflect.getPrototypeOf(session[kSocket]);
},
set(session, prop, value) {
switch (prop) {
case 'setTimeout':
session.setTimeout = value;
return true;
case 'destroy':
case 'emit':
case 'end':
case 'pause':
case 'read':
case 'resume':
case 'write':
throw new errors.Error('ERR_HTTP2_NO_SOCKET_MANIPULATION');
default:
session[kSocket][prop] = value;
return true;
}
}
};
function pingCallback(cb) {
return function(ack, duration, payload) {
const err = ack ? null : new errors.Error('ERR_HTTP2_PING_CANCEL');
cb(err, duration, payload);
};
}
// Upon creation, the Http2Session takes ownership of the socket. The session
// may not be ready to use immediately if the socket is not yet fully connected.
class Http2Session extends EventEmitter {
constructor(type, options, socket) {
super();
if (!socket._handle || !socket._handle._externalStream) {
socket = new StreamWrap(socket);
}
// No validation is performed on the input parameters because this
// constructor is not exported directly for users.
// If the session property already exists on the socket,
// then it has already been bound to an Http2Session instance
// and cannot be attached again.
if (socket[kSession] !== undefined)
throw new errors.Error('ERR_HTTP2_SOCKET_BOUND');
socket[kSession] = this;
this[kState] = {
streams: new Map(),
destroyed: false,
shutdown: false,
shuttingDown: false,
pendingAck: 0,
maxPendingAck: Math.max(1, (options.maxPendingAck | 0) || 10),
writeQueueSize: 0
};
this[kType] = type;
this[kProxySocket] = null;
this[kSocket] = socket;
// Do not use nagle's algorithm
if (typeof socket.setNoDelay === 'function')
socket.setNoDelay();
// Disable TLS renegotiation on the socket
if (typeof socket.disableRenegotiation === 'function')
socket.disableRenegotiation();
socket[kDestroySocket] = socket.destroy;
socket.destroy = socketDestroy;
const setupFn = setupHandle(this, socket, type, options);
if (socket.connecting) {
this[kState].connecting = true;
const connectEvent =
socket instanceof tls.TLSSocket ? 'secureConnect' : 'connect';
socket.once(connectEvent, setupFn);
} else {
setupFn();
}
// Any individual session can have any number of active open
// streams, these may all need to be made aware of changes
// in state that occur -- such as when the associated socket
// is closed. To do so, we need to set the max listener count
// to something more reasonable because we may have any number
// of concurrent streams (2^31-1 is the upper limit on the number
// of streams)
this.setMaxListeners(kMaxStreams);
debug(`Http2Session ${sessionName(type)}: created`);
}
[kUpdateTimer]() {
_unrefActive(this);
}
setNextStreamID(id) {
if (typeof id !== 'number')
throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'id', 'number');
if (id <= 0 || id > kMaxStreams)
throw new errors.RangeError('ERR_OUT_OF_RANGE');
this[kHandle].setNextStreamID(id);
}
ping(payload, callback) {
const state = this[kState];
if (state.destroyed || state.destroying)
throw new errors.Error('ERR_HTTP2_INVALID_SESSION');
if (typeof payload === 'function') {
callback = payload;
payload = undefined;
}
if (payload && !isArrayBufferView(payload)) {
throw new errors.TypeError('ERR_INVALID_ARG_TYPE',
'payload',
['Buffer', 'TypedArray', 'DataView']);
}
if (payload && payload.length !== 8) {
throw new errors.RangeError('ERR_HTTP2_PING_LENGTH');
}
if (typeof callback !== 'function')
throw new errors.TypeError('ERR_INVALID_CALLBACK');
return this[kHandle].ping(payload, pingCallback(callback));
}
[kInspect](depth, opts) {
const state = this[kState];
const obj = {
type: this[kType],
destroyed: state.destroyed,
destroying: state.destroying,
shutdown: state.shutdown,
shuttingDown: state.shuttingDown,
state: this.state,
localSettings: this.localSettings,
remoteSettings: this.remoteSettings
};
return `Http2Session ${util.format(obj)}`;
}
// The socket owned by this session
get socket() {
const proxySocket = this[kProxySocket];
if (proxySocket === null)
return this[kProxySocket] = new Proxy(this, proxySocketHandler);
return proxySocket;
}
// The session type
get type() {
return this[kType];
}
// true if the Http2Session is waiting for a settings acknowledgement
get pendingSettingsAck() {
return this[kState].pendingAck > 0;
}
// true if the Http2Session has been destroyed
get destroyed() {
return this[kState].destroyed;
}
// Retrieves state information for the Http2Session
get state() {
const handle = this[kHandle];
return handle === undefined ? {} : getSessionState(handle);
}
// The settings currently in effect for the local peer. These will
// be updated only when a settings acknowledgement has been received.
get localSettings() {
let settings = this[kLocalSettings];
if (settings !== undefined)
return settings;
const handle = this[kHandle];
if (handle === undefined)
return {};
settings = getSettings(handle, false); // Local
this[kLocalSettings] = settings;
return settings;
}
// The settings currently in effect for the remote peer.
get remoteSettings() {
let settings = this[kRemoteSettings];
if (settings !== undefined)
return settings;
const handle = this[kHandle];
if (handle === undefined)
return {};
settings = getSettings(handle, true); // Remote
this[kRemoteSettings] = settings;
return settings;
}
// Submits a SETTINGS frame to be sent to the remote peer.
settings(settings) {
const state = this[kState];
if (state.destroyed || state.destroying)
throw new errors.Error('ERR_HTTP2_INVALID_SESSION');
// Validate the input first
assertIsObject(settings, 'settings');
settings = Object.assign(Object.create(null), settings);
assertWithinRange('headerTableSize',
settings.headerTableSize,
0, kMaxInt);
assertWithinRange('initialWindowSize',
settings.initialWindowSize,
0, kMaxInt);
assertWithinRange('maxFrameSize',
settings.maxFrameSize,
16384, kMaxFrameSize);
assertWithinRange('maxConcurrentStreams',
settings.maxConcurrentStreams,
0, kMaxStreams);
assertWithinRange('maxHeaderListSize',
settings.maxHeaderListSize,
0, kMaxInt);
if (settings.enablePush !== undefined &&
typeof settings.enablePush !== 'boolean') {
const err = new errors.TypeError('ERR_HTTP2_INVALID_SETTING_VALUE',
'enablePush', settings.enablePush);
err.actual = settings.enablePush;
throw err;
}
if (state.pendingAck === state.maxPendingAck) {
throw new errors.Error('ERR_HTTP2_MAX_PENDING_SETTINGS_ACK',
this[kState].pendingAck);
}
debug(`Http2Session ${sessionName(this[kType])}: sending settings`);
state.pendingAck++;
const fn = submitSettings.bind(this, settings);
if (state.connecting) {
this.once('connect', fn);
return;
}
fn();
}
// Destroy the Http2Session
destroy() {
const state = this[kState];
if (state.destroyed || state.destroying)
return;
debug(`Http2Session ${sessionName(this[kType])}: destroying`);
state.destroying = true;
state.destroyed = false;
// Unenroll the timer
this.setTimeout(0, sessionOnTimeout);
// Shut down any still open streams
const streams = state.streams;
streams.forEach((stream) => stream.destroy());
// Disassociate from the socket and server
const socket = this[kSocket];
// socket.pause();
delete this[kProxySocket];
delete this[kSocket];
delete this[kServer];
if (this[kHandle] !== undefined)
this[kHandle].destroying();
setImmediate(finishSessionDestroy.bind(this), socket);
}
// Graceful or immediate shutdown of the Http2Session. Graceful shutdown
// is only supported on the server-side
shutdown(options, callback) {
const state = this[kState];
if (state.destroyed || state.destroying)
throw new errors.Error('ERR_HTTP2_INVALID_SESSION');
if (state.shutdown || state.shuttingDown)
return;
const type = this[kType];
if (typeof options === 'function') {
callback = options;
options = undefined;
}
assertIsObject(options, 'options');
options = Object.assign(Object.create(null), options);
if (options.opaqueData !== undefined &&
!isArrayBufferView(options.opaqueData)) {
throw new errors.TypeError('ERR_INVALID_OPT_VALUE',
'opaqueData',
options.opaqueData);
}
if (type === NGHTTP2_SESSION_SERVER &&
options.graceful !== undefined &&
typeof options.graceful !== 'boolean') {
throw new errors.TypeError('ERR_INVALID_OPT_VALUE',
'graceful',
options.graceful);
}
if (options.errorCode !== undefined &&
typeof options.errorCode !== 'number') {
throw new errors.TypeError('ERR_INVALID_OPT_VALUE',
'errorCode',
options.errorCode);
}
if (options.lastStreamID !== undefined &&
(typeof options.lastStreamID !== 'number' ||
options.lastStreamID < 0)) {
throw new errors.TypeError('ERR_INVALID_OPT_VALUE',
'lastStreamID',
options.lastStreamID);
}
debug(`Http2Session ${sessionName(type)}: initiating shutdown`);
state.shuttingDown = true;
if (callback) {
this.on('shutdown', callback);
}
const fn = submitShutdown.bind(this, options);
if (state.connecting) {
this.once('connect', fn);
return;
}
debug(`Http2Session ${sessionName(type)}: sending shutdown`);
fn();
}
_onTimeout() {
// This checks whether a write is currently in progress and also whether
// that write is actually sending data across the write. The kHandle
// stored `chunksSentSinceLastWrite` is only updated when a timeout event
// happens, meaning that if a write is ongoing it should never equal the
// newly fetched, updated value.
if (this[kState].writeQueueSize > 0) {
const handle = this[kHandle];
const chunksSentSinceLastWrite = handle !== undefined ?
handle.chunksSentSinceLastWrite : null;
if (chunksSentSinceLastWrite !== null &&
chunksSentSinceLastWrite !== handle.updateChunksSent()) {
this[kUpdateTimer]();
return;
}
}
process.nextTick(emit, this, 'timeout');
}
}
class ServerHttp2Session extends Http2Session {
constructor(options, socket, server) {