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
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
'use strict';
const EventEmitter = require('events');
const JSONB = require('json-buffer');
const loadStore = options => {
const adapters = {
redis: '@keyv/redis',
rediss: '@keyv/redis',
mongodb: '@keyv/mongo',
mongo: '@keyv/mongo',
sqlite: '@keyv/sqlite',
postgresql: '@keyv/postgres',
postgres: '@keyv/postgres',
mysql: '@keyv/mysql',
etcd: '@keyv/etcd',
offline: '@keyv/offline',
tiered: '@keyv/tiered',
};
if (options.adapter || options.uri) {
const adapter = options.adapter || /^[^:+]*/.exec(options.uri)[0];
return new (require(adapters[adapter]))(options);
}
return new Map();
};
const iterableAdapters = [
'sqlite',
'postgres',
'mysql',
'mongo',
'redis',
'tiered',
];
class Keyv extends EventEmitter {
constructor(uri, {emitErrors = true, ...options} = {}) {
super();
this.opts = {
namespace: 'keyv',
serialize: JSONB.stringify,
deserialize: JSONB.parse,
...((typeof uri === 'string') ? {uri} : uri),
...options,
};
if (!this.opts.store) {
const adapterOptions = {...this.opts};
this.opts.store = loadStore(adapterOptions);
}
if (this.opts.compression) {
const compression = this.opts.compression;
this.opts.serialize = compression.serialize.bind(compression);
this.opts.deserialize = compression.deserialize.bind(compression);
}
if (typeof this.opts.store.on === 'function' && emitErrors) {
this.opts.store.on('error', error => this.emit('error', error));
}
this.opts.store.namespace = this.opts.namespace;
const generateIterator = iterator => async function * () {
for await (const [key, raw] of typeof iterator === 'function'
? iterator(this.opts.store.namespace)
: iterator) {
const data = this.opts.deserialize(raw);
if (this.opts.store.namespace && !key.includes(this.opts.store.namespace)) {
continue;
}
if (typeof data.expires === 'number' && Date.now() > data.expires) {
this.delete(key);
continue;
}
yield [this._getKeyUnprefix(key), data.value];
}
};
// Attach iterators
if (typeof this.opts.store[Symbol.iterator] === 'function' && this.opts.store instanceof Map) {
this.iterator = generateIterator(this.opts.store);
} else if (typeof this.opts.store.iterator === 'function' && this.opts.store.opts
&& this._checkIterableAdaptar()) {
this.iterator = generateIterator(this.opts.store.iterator.bind(this.opts.store));
}
}
_checkIterableAdaptar() {
return iterableAdapters.includes(this.opts.store.opts.dialect)
|| iterableAdapters.findIndex(element => this.opts.store.opts.url.includes(element)) >= 0;
}
_getKeyPrefix(key) {
return `${this.opts.namespace}:${key}`;
}
_getKeyPrefixArray(keys) {
return keys.map(key => `${this.opts.namespace}:${key}`);
}
_getKeyUnprefix(key) {
return key
.split(':')
.splice(1)
.join(':');
}
get(key, options) {
const {store} = this.opts;
const isArray = Array.isArray(key);
const keyPrefixed = isArray ? this._getKeyPrefixArray(key) : this._getKeyPrefix(key);
if (isArray && store.getMany === undefined) {
const promises = [];
for (const key of keyPrefixed) {
promises.push(Promise.resolve()
.then(() => store.get(key))
.then(data => (typeof data === 'string') ? this.opts.deserialize(data) : (this.opts.compression ? this.opts.deserialize(data) : data))
.then(data => {
if (data === undefined || data === null) {
return undefined;
}
if (typeof data.expires === 'number' && Date.now() > data.expires) {
return this.delete(key).then(() => undefined);
}
return (options && options.raw) ? data : data.value;
}),
);
}
return Promise.allSettled(promises)
.then(values => {
const data = [];
for (const value of values) {
data.push(value.value);
}
return data;
});
}
return Promise.resolve()
.then(() => isArray ? store.getMany(keyPrefixed) : store.get(keyPrefixed))
.then(data => (typeof data === 'string') ? this.opts.deserialize(data) : (this.opts.compression ? this.opts.deserialize(data) : data))
.then(data => {
if (data === undefined || data === null) {
return undefined;
}
if (isArray) {
const result = [];
for (let row of data) {
if ((typeof row === 'string')) {
row = this.opts.deserialize(row);
}
if (row === undefined || row === null) {
result.push(undefined);
continue;
}
if (typeof row.expires === 'number' && Date.now() > row.expires) {
this.delete(key).then(() => undefined);
result.push(undefined);
} else {
result.push((options && options.raw) ? row : row.value);
}
}
return result;
}
if (typeof data.expires === 'number' && Date.now() > data.expires) {
return this.delete(key).then(() => undefined);
}
return (options && options.raw) ? data : data.value;
});
}
set(key, value, ttl) {
const keyPrefixed = this._getKeyPrefix(key);
if (typeof ttl === 'undefined') {
ttl = this.opts.ttl;
}
if (ttl === 0) {
ttl = undefined;
}
const {store} = this.opts;
return Promise.resolve()
.then(() => {
const expires = (typeof ttl === 'number') ? (Date.now() + ttl) : null;
if (typeof value === 'symbol') {
this.emit('error', 'symbol cannot be serialized');
}
value = {value, expires};
return this.opts.serialize(value);
})
.then(value => store.set(keyPrefixed, value, ttl))
.then(() => true);
}
delete(key) {
const {store} = this.opts;
if (Array.isArray(key)) {
const keyPrefixed = this._getKeyPrefixArray(key);
if (store.deleteMany === undefined) {
const promises = [];
for (const key of keyPrefixed) {
promises.push(store.delete(key));
}
return Promise.allSettled(promises)
.then(values => values.every(x => x.value === true));
}
return Promise.resolve()
.then(() => store.deleteMany(keyPrefixed));
}
const keyPrefixed = this._getKeyPrefix(key);
return Promise.resolve()
.then(() => store.delete(keyPrefixed));
}
clear() {
const {store} = this.opts;
return Promise.resolve()
.then(() => store.clear());
}
has(key) {
const keyPrefixed = this._getKeyPrefix(key);
const {store} = this.opts;
return Promise.resolve()
.then(async () => {
if (typeof store.has === 'function') {
return store.has(keyPrefixed);
}
const value = await store.get(keyPrefixed);
return value !== undefined;
});
}
disconnect() {
const {store} = this.opts;
if (typeof store.disconnect === 'function') {
return store.disconnect();
}
}
}
module.exports = Keyv;
|
