-
-
Notifications
You must be signed in to change notification settings - Fork 223
/
port-polling.js
218 lines (178 loc) · 6.35 KB
/
port-polling.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
const util = require('util');
const errors = require('../errors');
const getNodeVersion = (message) => {
if (!message.debug || !message.debug.versions) {
return null;
}
return message.debug.versions.node || null;
};
/**
* @TODO: in theory it could happen that other clients connect, but tbh even with the port polling it was possible: you
* could just start a server on the Ghost port
*/
const useNetServer = (ui, options) => new Promise((resolve, reject) => {
const net = require('net');
const {useV4Boot} = options;
let waitTimeout = null;
let ghostSocket = null;
let started = false;
let nodeCheck = false;
const server = net.createServer((socket) => {
ghostSocket = socket;
socket.on('data', (data) => {
let message;
try {
message = JSON.parse(data);
} catch (err) {
message = {started: false, ready: false, error: err};
}
const nodeVersion = getNodeVersion(message);
if (!nodeCheck && nodeVersion && nodeVersion !== process.versions.node) {
nodeCheck = true;
ui.log(
`Warning: Ghost is running with node v${nodeVersion}.\n` +
`Your current node version is v${process.versions.node}.`,
'yellow'
);
}
ui.logVerbose(`Received message from Ghost: ${util.inspect(message)}`, 'green');
if (useV4Boot && message.started) {
started = true;
socket.destroy();
ghostSocket = null;
return;
}
/* istanbul ignore else */
if (waitTimeout) {
clearTimeout(waitTimeout);
}
socket.destroy();
ghostSocket = null;
server.close(() => {
if ((!useV4Boot && message.started) || (useV4Boot && message.ready)) {
resolve();
} else {
let {message: errMsg} = message.error;
if (useV4Boot && started) {
errMsg = `Ghost was able to start, but errored during boot with: ${errMsg}`;
}
reject(new errors.GhostError({
message: errMsg,
help: message.error.help,
suggestion: options.logSuggestion
}));
}
});
});
});
waitTimeout = setTimeout(() => {
if (ghostSocket) {
ghostSocket.destroy();
}
ghostSocket = null;
server.close(() => {
reject(new errors.GhostError({
message: 'Could not communicate with Ghost',
suggestion: options.logSuggestion
}));
});
}, options.netServerTimeoutInMS);
server.listen({host: options.socketAddress.host, port: options.socketAddress.port});
});
const usePortPolling = (_, options) => {
const net = require('net');
if (!options.port) {
return Promise.reject(new errors.CliError({
message: 'Port is required.'
}));
}
const connectToGhostSocket = () => new Promise((resolve, reject) => {
// if host is specified and is *not* 0.0.0.0 (listen on all ips), use the custom host
const host = options.host && options.host !== '0.0.0.0' ? options.host : 'localhost';
const ghostSocket = net.connect(options.port, host);
let delayOnConnectTimeout;
// inactivity timeout
ghostSocket.setTimeout(options.socketTimeoutInMS);
ghostSocket.on('timeout', (() => {
if (delayOnConnectTimeout) {
clearTimeout(delayOnConnectTimeout);
}
ghostSocket.destroy();
// force retry
const err = new Error('Socket timed out.');
err.retry = true;
reject(err);
}));
ghostSocket.on('connect', (() => {
if (options.delayOnConnectInMS) {
let ghostDied = false;
// CASE: client closes socket
ghostSocket.on('close', (() => {
ghostDied = true;
}));
delayOnConnectTimeout = setTimeout(() => {
ghostSocket.destroy();
if (ghostDied) {
reject(new Error('Ghost died.'));
} else {
resolve();
}
}, options.delayOnConnectInMS);
return;
}
ghostSocket.destroy();
resolve();
}));
ghostSocket.on('error', ((err) => {
ghostSocket.destroy();
err.retry = true;
reject(err);
}));
});
const startPolling = (() => new Promise((resolve, reject) => {
let tries = 0;
(function retry() {
connectToGhostSocket()
.then(() => {
resolve();
})
.catch((err) => {
if (err.retry && tries < options.maxTries) {
tries = tries + 1;
setTimeout(retry, options.retryTimeoutInMS);
return;
}
/* istanbul ignore next */
if (err instanceof errors.CliError) {
return reject(err);
}
reject(new errors.GhostError({
message: 'Ghost did not start.',
suggestion: options.logSuggestion,
err: err
}));
});
}());
}));
return startPolling();
};
module.exports = function portPolling(ui, options) {
options = Object.assign({
retryTimeoutInMS: 2000,
maxTries: 20,
delayOnConnectInMS: 3 * 2000,
logSuggestion: 'ghost log',
socketTimeoutInMS: 1000 * 60,
useNetServer: false,
useV4Boot: false,
netServerTimeoutInMS: 5 * 60 * 1000,
socketAddress: {
port: 1212,
host: 'localhost'
}
}, options || {});
if (options.useNetServer) {
return useNetServer(ui, options);
}
return usePortPolling(ui, options);
};