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server.js
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var http = require('http'),
https = require('https'),
tls = require('tls'),
fs = require('fs'),
os = require('os'),
url = require('url'),
path = require('path'),
util = require('util'),
crypto = require('crypto'),
EventEmitter = require('events'),
request = require('request'),
clipboardy = require('clipboardy'),
notifier = require('node-notifier'),
express = require('express'),
bodyParser = require('body-parser'),
WebSocket = require('ws'),
resourceType = require('./resource-type'),
RemoteConsole = require('./remote-console'),
MessageBody = require('./lib/message-body'),
rawRespond = require('./lib/raw-respond'),
insensitize = require('./lib/insensitize'),
serverCert = require('./lib/server-cert'),
SessionCLI = require('./session-cli'),
Script = require('./lib/script'),
Target = require('./lib/target'),
GatewayTarget = require('./lib/gateway-target'),
InprocTarget = require('./lib/inproc-target'),
ReverseProxyTarget = require('./lib/reverse-proxy-target'),
ForwardProxyTarget = require('./lib/forward-proxy-target'),
InternalTarget = require('./lib/internal-target'),
version = require('./package.json').version;
var argv = require('yargs').argv;
var wsid = 0;
var DEVTOOLS = path.join(__dirname, 'deps', 'devtools-frontend'),
DEVTOOLS_CASE_SENSITIVE = !fs.existsSync(DEVTOOLS + '/InSPECtOR.HtML'),
UNSAFE = /[\\/:*?"<>|]/g,
COLON = /:/g;
exports = module.exports = InspectionServer;
function missingOpt(name) {
throw new TypeError('Missing required option: ' + name);
}
function gatewayFromHost(host) {
host = host.split('.');
host.splice(0, 1);
return host.join('.');
}
function stringVals(obj) {
var r = {};
for (var k in obj) r[k] = obj[k].toString();
return r;
}
var thisHid = getHid();
// An Inspector instance maps roughly to an open GUI tab (ie localhost:9000/inspect/something)
// in that it pairs target(s) to an inspection GUI.
// The Inspector is responsible for receiving HTTP request/response data from a target,
// which can be a remote host on the gateway server, a local proxy host (forward or reverse),
// or another node process on this machine. This data can be received over a WebSocket, TODO
// over a interprocess unix domain socket, or by in-process function call.
// The Inspector does the necesssary translation of various HTTP events into the
// DevTools Wire Protocol, which is sent over WebSocket to connected GUI pages (the "frontend").
// An Inspector instance supports multiple targets and zero or more GUI instances may be
// connected at any time.
function Inspector(server, opts) {
var self = this;
EventEmitter.call(this);
this.server = server;
this.opts = opts;
this.id = crypto.randomBytes(33).toString('base64');
this.name = opts.name;
this.tn = 0;
this.targets = {};
this.clients = [];
this.console = new RemoteConsole(this);
this.reqn = 0;
this.reqs = {};
this.lastGC = Date.now();
this.gcFreqMs = opts.gcFreqMs || 1000*60*15;
this.gcFreqCount = opts.gcFreqCount || 500;
this.gcMinLifetime = opts.gcMinLifetime || 1000*60*5;
this.bufferLen = opts.bufferLen || 512;
this.buffer = [];
this.unseenReqs = 0;
this.sessionCLI = new SessionCLI(this);
this.notify = [];
this.tmpDir = opts.tmpDir || path.join(os.tmpdir(), 'netsleuth');
fs.mkdir(this.tmpDir, function() {});
this.config = {
blockedUrls: [],
ua: null,
throttle: {
offline: false
},
noCache: false
};
self._gctimer = setInterval(function() {
self.reqGC();
}, self.gcFreqMs);
// every hour, delete any temp files more than 24 hours old
// (temp files are saved when a request body is > 100 kB or response body is > 10 MB)
self._tmpcleanup = setInterval(function() {
fs.readdir(self.tmpDir, function(err, files) {
if (err) return console.error('error cleaning temp dir', err);
files.forEach(function(file) {
file = path.join(self.tmpDir, file);
fs.stat(file, function(err, stats) {
if (err) return console.error('error stating temp file', file, err);
if (stats.mtime < Date.now() - (1000 * 60 * 60 * 24)) {
fs.unlink(file, function(err) {
if (err) return console.error('error deleting temp file', file, err);
});
}
});
});
});
}, 1000 * 60 * 60);
// self.connect = preconnect;
var scriptDirs = [];
if (server.scriptDir && !opts.transient && !opts.temp) scriptDirs.push(path.join(server.scriptDir, opts.name.replace(UNSAFE, '_')));
if (opts.scriptDir) scriptDirs.push(opts.scriptDir);
self.script = new Script(self, {
dirs: scriptDirs
});
self.addTarget('_req', {
internal: true
});
};
util.inherits(Inspector, EventEmitter);
Inspector.prototype.addTarget = function(id, opts) {
var self = this;
if (typeof id == 'object') {
opts = id;
id = 'target' + ++self.tn;
}
var target;
if (opts.local) { // local proxy mode
target = self.targets[id] = new ReverseProxyTarget(self, opts);
} else if (opts.fwd) {
target = self.targets[id] = new ForwardProxyTarget(self, opts);
} else if (opts.inproc) {
target = self.targets[id] = new InprocTarget(self, opts);
} else if (opts.internal) {
target = self.targets[id] = new InternalTarget(self, opts);
} else {
target = self.targets[id] = new GatewayTarget(self, opts);
if (!target.token && self.server.opts.gateways && self.server.opts.gateways[target.gateway]) {
target.token = self.server.opts.gateways[target.gateway].token;
}
}
target.id = id;
target.on('connected', function(msg) {
self.console.info(msg);
self.broadcast({
method: 'Gateway.connectionState',
params: {
state: target.state
}
});
});
target.on('temp-error', function(err, msg) {
console.error('Gateway connection error.', err);
self.console.error('Gateway connection error: ' + err.message);
});
target.on('error', function(err) {
self.console.error(err.message);
self.emit('error', err);
});
target.on('closed', function(msg, code, reason) {
console.error(msg, code, reason);
self.console.error(msg + ' ' + code + ' ' + reason);
self.broadcast({
method: 'Gateway.connectionState',
params: {
state: self.state,
message: 'Disconnected from target'
}
});
for (var id in self.reqs) {
var txn = self.reqs[id];
if (txn.req) {
if (txn.req.socket) txn.req.socket.destroy();
delete txn.req;
if (txn.reqBody) txn.reqBody.destroy();
if (txn.resBody) txn.resBody.destroy();
self.broadcast({
method: 'Network.loadingFailed',
params: {
requestId: id,
timestamp: Date.now() / 1000,
type: 'Other',
errorText: 'disconnected from target during request'
}
});
} else if (txn.ws) {
txn.ws.close();
}
}
});
target.on('warn', function(msg, txn) {
self.console.source('network', txn.id).warn(msg);
});
target.on('console-msg', function(type, msg) {
if (self.console[type]) {
self.console[type](msg);
} else {
self.console.log(msg);
}
});
target.on('request-created', function(txn) {
// do garbage collection on the nextish tick if necessary
if (++self.reqn % self.gcFreqCount == 0) self.reqGC();
self.reqs[txn.id] = txn;
});
function unseen() {
++self.unseenReqs;
self.emit('unseen-req');
}
target.on('request', function(txn) {
if (self.buffer) unseen();
self.broadcast({
method: 'Network.requestWillBeSent',
params: {
requestId: txn.id,
loaderId: 'ld',
documentURL: 'docurl',
timestamp: Date.now() / 1000,
wallTime: Date.now() / 1000,
request: {
url: txn.originalProto + '://' + txn.originalHost + txn.originalPath,
method: txn.method,
headers: stringVals(txn.reqHeaders),
postData: txn.reqBody ? '' : undefined
},
initiator: txn.stack && {
type: 'script',
stack: {
callFrames: txn.stack
},
url: 'script-url',
lineNumber: 0
},
type: 'Other'
}
});
for (var i = 0; i < self.notify.length; i++) {
var n = self.notify[i];
if (n.method == '*' || n.method == txn.method) {
if (n.rex.test(txn.originalPath)) {
notifier.notify({
title: txn.originalHost,
message: txn.method + ' ' + txn.originalPath
});
break;
}
}
}
});
target.on('req-contunue', function(txn) {
self.console.source('network', txn.id).debug('Got 100 Continue for ' + txn.url());
});
target.on('req-information', function(txn, info) {
self.console.source('network', txn.id).info('HTTP ' + info.statusCode + ' ' + info.statusMessage + ' from ' + txn.url());
});
target.on('req-large', function(txn) {
self.broadcast({
method: 'Gateway.updateRequestBody',
params: {
id: txn.id,
sentToDisk: true,
file: txn.reqBody.file.path
}
});
});
target.on('res-large', function(txn) {
self.broadcast({
method: 'Gateway.responseBodyLarge',
params: {
id: txn.id,
file: txn.resBody.file.path
}
});
});
target.on('req-blocked', function(txn, rule) {
// TODO: update blocks panel
if (self.buffer) unseen();
self.broadcast({
method: 'Network.requestWillBeSent',
params: {
requestId: txn.id,
loaderId: 'ld',
documentURL: 'docurl',
timestamp: Date.now() / 1000,
wallTime: Date.now() / 1000,
request: {
url: txn.originalProto + '://' + txn.originalHost + txn.originalPath,
method: txn.method,
headers: stringVals(txn.reqHeaders),
postData: txn.reqBody ? '' : undefined
},
initiator: txn.stack && {
type: 'script',
stack: {
callFrames: txn.stack
},
url: 'script-url',
lineNumber: 0
},
type: 'Other'
}
});
self.broadcast({
method: 'Network.loadingFailed',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
type: 'Other',
errorText: 'Blocked'
}
});
self.console.source('network', txn.id).warn('Blocked request for ' + txn.method + ' ' + txn.url());
});
target.on('req-error', function(txn, err) {
txn.destroy = true;
if (txn.req && txn.req.socket) txn.req.socket.destroy();
if (txn.reqBody) txn.reqBody.destroy();
if (txn.resBody) txn.resBody.destroy();
txn.done = true;
self.broadcast({
method: 'Network.loadingFailed',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
type: 'Other',
errorText: err.message
}
});
self.console.source('network', txn.id).error('Unable to ' + txn.method + ' ' + txn.url() + '\n' + err.message);
});
target.on('req-data', function(txn, payload) {
if (txn.reqBody && !txn.reqBody.file) {
self.broadcast({
method: 'Gateway.updateRequestBody',
params: {
id: txn.id,
body: payload.toString() // TODO: binary?
}
});
}
});
target.on('response', function(txn) {
var mime = txn.resHeaders['content-type'];
if (mime) {
mime = mime.split(';')[0];
}
self.broadcast({
method: 'Network.responseReceived',
params: {
requestId: txn.id,
loaderId: 'ld',
timestamp: Date.now() / 1000,
wallTime: Date.now() / 1000,
response: {
protocol: txn.originalProto + ':',
url: txn.url(),
securityState: txn.targetProto == 'https' ? (txn.authorized ? 'secure' : 'insecure') : 'neutral',
securityDetails: txn.authorizationError,
status: txn.resStatus,
statusText: txn.resMessage,
headers: stringVals(txn.resHeaders),
headersText: txn.getRawResHeaders(),
mimeType: mime,
requestHeaders: stringVals(txn.reqHeaders),
requestHeadersText: txn.getRawReqHeaders(),
remoteIPAddress: txn.remoteIP,
remotePort: txn.remotePort,
connectionId: txn.id
},
type: resourceType(txn.resHeaders['content-type'])
}
});
});
target.on('res-insecure', function(txn) {
self.console.source('network', txn.id).warn('Warning: connection to https://' + txn.targetHost + ' is not secure! Certificate validation failed with error ' + txn.insecureError + '.');
self.broadcast({
method: 'Gateway.securityState',
params: {
insecure: true,
message: 'TLS error: ' + txn.insecureError
}
});
});
target.on('res-secure', function(txn) {
self.console.source('network', txn.id).info('The certificate for https://' + txn.targetHost + ' is now validating.');
self.broadcast({
method: 'Gateway.securityState',
params: {
insecure: false
}
});
});
target.on('res-data', function(txn, chunk) {
self.broadcast({
method: 'Network.dataReceived',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
dataLength: chunk.length,
encodedDataLength: chunk.length
}
});
});
target.on('res-close', function(txn) {
txn.done = true;
if (!txn.complete) {
self.broadcast({
method: 'Network.loadingFailed',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
type: 'Other',
errorText: 'incomplete response'
}
});
self.console.source('network', txn.id).error('Response for ' + txn.method + ' ' + txn.url() + ' terminated prematurely');
}
});
target.on('res-end', function(txn) {
txn.done = true;
if (txn.complete) {
self.broadcast({
method: 'Network.loadingFinished',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
encodedDataLength: txn.resBody && txn.resBody.length
}
});
}
});
target.on('ws-close', function(txn) {
txn.done = true;
self.broadcast({
method: 'Network.webSocketClosed',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000
}
});
});
target.on('ws-error', function(txn, err) {
self.console.source('network', txn.id).error('WebSocket error:', err);
});
target.on('ws-upgrade', function(txn) {
self.broadcast({
method: 'Network.webSocketHandshakeResponseReceived',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
response: {
status: txn.resStatus,
statusText: txn.resMessage,
headers: stringVals(txn.resHeaders),
headersText: 'TODO',
requestHeaders: stringVals(txn.reqHeaders),
requestHeadersText: 'TODO'
}
}
});
});
target.on('ws-frame-received', function(txn, payload) {
var bin = !(typeof payload == 'string');
self.broadcast({
method: 'Network.webSocketFrameReceived',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
response: {
opcode: bin ? 2 : 1,
mask: false,
payloadData: bin ? payload.toString('base64') : payload
}
}
});
});
target.on('ws-frame-sent', function(txn, payload) {
var bin = !(typeof payload == 'string');
self.broadcast({
method: 'Network.webSocketFrameSent',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
response: {
opcode: bin ? 2 : 1,
mask: false,
payloadData: bin ? payload.toString('base64') : payload
}
}
});
});
target.on('ws-unexpected-response', function(txn, res) {
self.broadcast({
method: 'Network.webSocketFrameError',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
errorMessage: 'Unexpected response code: ' + res.statusCode + ' ' + res.statusMessage
}
});
self.console.source('network', txn.id).error('WebSocket connection to ' + txn.url() + ' failed: Error during WebSocket handshake: Unexpected response code: ' + res.statusCode + ' ' + res.statusMessage);
});
target.on('ws-request', function(txn) {
self.reqs[txn.id] = txn;
self.broadcast({
method: 'Network.webSocketCreated',
params: {
requestId: txn.id,
url: txn.url(),
initiator: {}
}
});
self.broadcast({
method: 'Network.webSocketWillSendHandshakeRequest',
params: {
requestId: txn.id,
timestamp: Date.now() / 1000,
wallTime: Date.now() / 1000,
request: {
headers: stringVals(txn.headers)
}
}
});
});
target.on('force-disconnect', function() {
self.console.error(target.serviceError);
self.broadcast({
method: 'Gateway.connectionState',
params: {
state: self.targets.main.state,
message: 'Disconnected from gateway'
}
});
});
target.on('hostname', function(hostname, ip) {
self.name = hostname;
self.emit('hostname', hostname, ip);
});
target.on('untrusted-cert', function(cert) {
cert.id = cert.fingerprint256.replace(COLON, '');
if (!self.server.rejectedCerts[cert.id]) {
self.broadcast({
method: 'Gateway.untrustedCert',
params: {
cert: cert
}
});
self.server.badCerts[cert.id] = cert;
}
});
target.on('destroy', function() {
self.removeTarget(target.id);
});
target.init();
this.updateTargets();
return target;
};
Inspector.prototype.reqGC = function() {
var self = this, now = Date.now(), del=0;
for (var id in self.reqs) {
if (!self.reqs[id].ws && self.reqs[id].date + self.gcMinLifetime < now) {
delete self.reqs[id];
++del;
}
}
};
Inspector.prototype.removeTarget = function(id) {
if (this.targets[id]) {
this.targets[id].close();
this.targets[id].removeAllListeners();
delete this.targets[id];
}
this.updateTargets();
};
Inspector.prototype.reconnect = function() {
for (var id in this.targets) this.targets[id].reconnect();
};
Inspector.prototype.close = function() {
if (this.shutdown) return;
this.shutdown = true;
clearInterval(this._gctimer);
clearTimeout(this._connto);
this.reqs = {};
for (var id in this.targets) this.removeTarget(id);
if (this.script) this.script.close();
// if (this.gateway && this.gateway._local) this.gateway.close();
this.console.warn('This inspector has been removed!');
this.broadcast({
method: 'Gateway.close'
});
this.clients.forEach(function(ws) {
ws.close();
});
};
Inspector.prototype.broadcast = function(msg) {
var self = this;
if (self.buffer) {
self.buffer.push(msg);
if (self.buffer.length > self.bufferLen) {
self.buffer.splice(0, 16);
}
} else {
msg = JSON.stringify(msg);
self.clients.forEach(function(ws) {
if (ws.readyState === WebSocket.OPEN) {
ws.send(msg);
}
});
}
};
Inspector.prototype.connection = function(ws, req) {
var self = this;
ws.id = ++wsid;
self.clients.push(ws);
ws.on('message', function(data) {
try {
var msg = JSON.parse(data);
switch (msg.method) {
case 'Network.enable':
reply();
if (!MessageBody.native) {
setTimeout(function() {
self.console.warn('Native modules failed to build. Some features (such as brotli decoding and non-utf8 character encoding support) will not work. See https://netsleuth.io/docs/native for more information.');
}, 100);
}
if (self.targets.main) {
if (self.targets.main.state != Target.SERVICE_STATE.OPEN) {
setTimeout(function() {
self.console.error('Not connected to gateway.');
if (self.serviceError) self.console.error(self.serviceError.message);
}, 100);
} else {
send({
m: 'inspector',
iid: ws.id
});
}
csend({
method: 'Gateway.connectionState',
params: {
state: self.targets.main.state
}
});
} else {
var n = 0,
open = 0;
for (var id in self.targets) {
++n;
if (self.targets[id].state == Target.SERVICE_STATE.OPEN) ++open;
}
csend({
method: 'Gateway.connectionState',
params: {
state: open ? 2 : 3
}
});
}
if (self.insecureError) csend({
method: 'Gateway.securityState',
params: {
insecure: true,
message: 'TLS error: ' + self.insecureError
}
});
break;
case 'Network.getResponseBody':
var info = self.reqs[msg.params.requestId];
var body = info && info.resBody;
if (info) {
if (body) {
body.get(function(err, b64, body) {
if (err) {
self.console.error('Error getting the response body of ' + info.msg.method + ' ' + info.msg.url + ': ' + err.message);
csend({
id: msg.id,
result: {
body: '(body not available: ' + err.message + ')',
base64Encoded: false
}
});
} else {
csend({
id: msg.id,
result: {
body: body,
base64Encoded: b64
}
});
}
});
} else {
csend({
id: msg.id,
result: {
body: '(missing response body)'
}
});
}
} else {
csend({
id: msg.id,
result: {
body: '(body no longer available -- discarded to save memory)'
}
});
}
break;
case 'Network.setBlockedURLs':
self.config.blockedUrls = msg.params.urls;
send({
m: 'block',
urls: msg.params.urls
});
reply();
break;
case 'Network.setUserAgentOverride':
self.config.ua = msg.params.userAgent || null;
send({
m: 'ua',
ua: msg.params.userAgent || null
});
reply();
break;
case 'Network.emulateNetworkConditions':
self.config.throttle = msg.params;
send({
m: 'throttle',
off: msg.params.offline,
latency: msg.params.latency,
down: msg.params.downloadThroughput,
up: msg.params.uploadThroughput
});
reply();
break;
case 'Network.setCacheDisabled':
self.config.noCache = msg.params.cacheDisabled;
send({
m: 'no-cache',
val: msg.params.cacheDisabled
});
reply();
break;
case 'Clipboard.write':
clipboardy.write(msg.params.text);
break;
case 'Runtime.evaluate':
self.sessionCLI.parse(msg, reply);
break;
case 'Gateway.setCertTrust':
self.server.setCertTrust(msg.params.hostname, msg.params.id, msg.params.op);
break;
case 'Gateway.openFile':
self.server.openFile(msg.params.path);
break;
case 'Gateway.revealFile':
self.server.revealFile(msg.params.path);
break;
case 'Gateway.clear':
for (var id in self.reqs) if (self.reqs[id].done) delete self.reqs[id];
break;
case 'Gateway.replay':
var txn = self.reqs[msg.params.id]
if (txn) {
if (txn.statusCode < 200) return self.console.error('Cannot replay requests that result in HTTP ' + txn.statusCode);
var opts = url.parse(txn.targetUrl());
opts.method = txn.method;
opts.headers = txn.reqHeaders;
opts.agent = opts.protocol == 'https:' ? https.globalAgent : http.globalAgent;
opts.rejectUnauthorized = false;
var req = new self.targets._req.ClientRequest(opts);
req.__init = [{
functionName: '(replay of ' + txn.id + ')'
}];
req.on('response', function(res) {
res.on('data', function() {
// noop
});
});
req.on('error', function(err) {
// noop
});
req.on('socket', function() {
req.socket.once('secureConnect', function() {
if (!req.socket.authorized && !req.socket.isSessionReused()) {
var cert = req.socket.getPeerCertificate();
cert.raw = serverCert.pemEncode(cert.raw.toString('base64'), 64);
cert.hostname = url.parse('https://' + txn.targetHost).hostname.toLowerCase();
if (!self.server.acceptedCerts[cert.hostname] || !self.server.acceptedCerts[cert.hostname][cert.fingerprint256.replace(COLON, '')]) {
self.targets._req.emit('untrusted-cert', cert);
var err = new Error(req.socket.authorizationError);
err.code = req.socket.authorizationError;
req.socket.destroy(err);
}
}
});
});
if (txn.reqBody) {
if (txn.reqBody.file) {
fs.createReadStream(txn.reqBody.file.path).on('error', function(err) {
self.console.error('Cannot replay request. Unable to open saved request body. ' + err.message);
req.destroy();
}).pipe(req);
} else {
req.end(txn.reqBody.data());
}
} else {
req.end();
}
}
break;
default:
// console.log(msg);
reply();
}
} catch (ex) {
console.error('Client protocol error:', ex.stack);
}
function reply(res) {
csend({
id: msg.id,
result: res || {}
});
}
});
ws.on('error', function(err) {
console.error('inspector connection error', err);
});
ws.on('close', function() {
for (var i = 0; i < self.clients.length; i++) {
if (self.clients[i] == ws) {
self.clients.splice(i, 1);
break;
}
}
if (self.clients.length == 0) self.buffer = [];
});
// enable console
csend({
method: 'Runtime.executionContextCreated',
params: {
context: {
id: 1,
name: 'netsleuth',
origin: 'origin'
}
}
});
if (self.buffer) {
var buf = self.buffer,
reqs = 0;
self.buffer = null;
buf.forEach(function(msg) {
if (msg.method == 'Network.requestWillBeSent') ++reqs;
self.broadcast(msg);
});
if (reqs < self.unseenReqs) self.console.warn(self.unseenReqs - reqs + ' requests made before you opened this inspector were discarded.');
self.unseenReqs = 0;
self.emit('unseen-req');
}