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
|
import { pad0 } from '~/misc/utils';
import { Log } from '~/store/types';
import { LogsAPIConfig } from '~/types';
import { buildLogsWebSocketURL, getURLAndInit } from '../misc/request-helper';
type AppendLogFn = (x: Log) => void;
enum WebSocketReadyState {
Connecting = 0,
Open = 1,
Closing = 2,
Closed = 3,
}
const endpoint = '/logs';
const textDecoder = new TextDecoder('utf-8');
const getRandomStr = () => {
return Math.floor((1 + Math.random()) * 0x10000).toString(16);
};
let even = false;
let fetched = false;
let decoded = '';
let ws: WebSocket;
let prevAppendLogFn: AppendLogFn;
function appendData(s: string, callback: AppendLogFn) {
let o: Partial<Log>;
try {
o = JSON.parse(s);
} catch (err) {
// eslint-disable-next-line no-console
console.log('JSON.parse error', JSON.parse(s));
}
const now = new Date();
const time = formatDate(now);
// mutate input param in place intentionally
o.time = time;
o.id = +now - 0 + getRandomStr();
o.even = even = !even;
callback(o as Log);
}
function formatDate(d: Date) {
// 19-03-09 12:45
const YY = d.getFullYear() % 100;
const MM = pad0(d.getMonth() + 1, 2);
const dd = pad0(d.getDate(), 2);
const HH = pad0(d.getHours(), 2);
const mm = pad0(d.getMinutes(), 2);
const ss = pad0(d.getSeconds(), 2);
return `${YY}-${MM}-${dd} ${HH}:${mm}:${ss}`;
}
function pump(reader: ReadableStreamDefaultReader, appendLog: AppendLogFn) {
return reader.read().then(({ done, value }) => {
const str = textDecoder.decode(value, { stream: !done });
decoded += str;
const splits = decoded.split('\n');
const lastSplit = splits[splits.length - 1];
for (let i = 0; i < splits.length - 1; i++) {
appendData(splits[i], appendLog);
}
if (done) {
appendData(lastSplit, appendLog);
decoded = '';
// eslint-disable-next-line no-console
console.log('GET /logs streaming done');
fetched = false;
return;
} else {
decoded = lastSplit;
}
return pump(reader, appendLog);
});
}
/** loose hashing of the connection configuration */
function makeConnStr(c: LogsAPIConfig) {
const keys = Object.keys(c);
keys.sort();
return keys.map((k) => c[k]).join('|');
}
let prevConnStr: string;
let controller: AbortController;
export function fetchLogs(apiConfig: LogsAPIConfig, appendLog: AppendLogFn) {
if (apiConfig.logLevel === 'uninit') return;
if (fetched || (ws && ws.readyState === WebSocketReadyState.Open)) return;
prevAppendLogFn = appendLog;
const url = buildLogsWebSocketURL(apiConfig, endpoint);
ws = new WebSocket(url);
ws.addEventListener('error', () => {
fetchLogsWithFetch(apiConfig, appendLog);
});
ws.addEventListener('message', function (event) {
appendData(event.data, appendLog);
});
}
export function stop() {
ws.close();
if (controller) controller.abort();
}
export function reconnect(apiConfig: LogsAPIConfig) {
if (!prevAppendLogFn || !ws) return;
ws.close();
fetched = false;
fetchLogs(apiConfig, prevAppendLogFn);
}
function fetchLogsWithFetch(apiConfig: LogsAPIConfig, appendLog: AppendLogFn) {
if (controller && makeConnStr(apiConfig) !== prevConnStr) {
controller.abort();
} else if (fetched) {
return;
}
fetched = true;
prevConnStr = makeConnStr(apiConfig);
controller = new AbortController();
const signal = controller.signal;
const { url, init } = getURLAndInit(apiConfig);
fetch(url + endpoint + '?level=' + apiConfig.logLevel, {
...init,
signal,
}).then(
(response) => {
const reader = response.body.getReader();
pump(reader, appendLog);
},
(err) => {
fetched = false;
if (signal.aborted) return;
// eslint-disable-next-line no-console
console.log('GET /logs error:', err.message);
}
);
}
|
