Fascinated/node-fetch-cache
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add filesystem caching with cacache

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This commit is contained in:
Randall Schmidt 2021-07-05 21:40:53 -04:00
parent e8ad8da0bb
commit 6cd42272c4
5 changed files with 268 additions and 35 deletions
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64
classes/caching/file_system_cache.js
View File

@ -1,26 +1,72 @@
import FPersist from 'fpersist';
import cacache from 'cacache';
import { Readable } from 'stream';
import { KeyTimeout } from './key_timeout.js';
function getBodyAndMetaKeys(key) {
return [`${key}body`, `${key}meta`];
}
export class FileSystemCache {
constructor(options = {}) {
this.ttl = options.ttl;
this.keyTimeout = new KeyTimeout();
const cacheDirectory = options.cacheDirectory || '.cache';
this.cache = new FPersist(cacheDirectory);
this.cacheDirectory = options.cacheDirectory || '.cache';
}
get(key) {
return this.cache.getItem(key);
async get(key) {
const [, metaKey] = getBodyAndMetaKeys(key);
const metaInfo = await cacache.get.info(this.cacheDirectory, metaKey);
if (!metaInfo) {
return undefined;
}
const metaBuffer = await cacache.get.byDigest(this.cacheDirectory, metaInfo.integrity);
const metaData = JSON.parse(metaBuffer);
const { bodyStreamIntegrity, bodyStreamLength } = metaData;
delete metaData.bodyStreamIntegrity;
delete metaData.bodyStreamLength;
const bodyStream = bodyStreamLength > 0
? cacache.get.stream.byDigest(this.cacheDirectory, bodyStreamIntegrity)
: Readable.from(Buffer.alloc(0));
return {
bodyStream,
metaData,
};
}
remove(key) {
const [bodyKey, metaKey] = getBodyAndMetaKeys(key);
this.keyTimeout.clearTimeout(key);
return this.cache.deleteItem(key);
return Promise.all([
cacache.rm.entry(this.cacheDirectory, bodyKey),
cacache.rm.entry(this.cacheDirectory, metaKey),
]);
}
async set(key, value) {
await this.cache.setItem(key, value);
async set(key, bodyStream, metaData, bodyStreamLength) {
const [bodyKey, metaKey] = getBodyAndMetaKeys(key);
const metaCopy = { ...metaData, bodyStreamLength };
this.keyTimeout.clearTimeout(key);
if (bodyStreamLength > 0) {
metaCopy.bodyStreamIntegrity = await new Promise((fulfill, reject) => {
bodyStream.pipe(cacache.put.stream(this.cacheDirectory, bodyKey))
.on('integrity', (i) => fulfill(i))
.on('error', (e) => {
reject(e);
});
});
}
const metaBuffer = Buffer.from(JSON.stringify(metaCopy));
await cacache.put(this.cacheDirectory, metaKey, metaBuffer);
if (typeof this.ttl === 'number') {
this.keyTimeout.updateTimeout(key, this.ttl, () => this.remove(key));

10
index.js
View File

@ -91,8 +91,16 @@ async function getResponse(cache, requestArguments) {
const fetchResponse = await fetch(...requestArguments);
const nfcResponse = NFCResponse.fromNodeFetchResponse(fetchResponse, ejectSelfFromCache);
const contentLength = Number.parseInt(nfcResponse.headers.get('content-length'), 10) || 0;
const nfcResponseSerialized = nfcResponse.serialize();
await cache.set(cacheKey, nfcResponseSerialized.bodyStream, nfcResponseSerialized.metaData);
await cache.set(
cacheKey,
nfcResponseSerialized.bodyStream,
nfcResponseSerialized.metaData,
contentLength,
);
return nfcResponse;
}

210
package-lock.json generated
View File

@ -427,6 +427,22 @@
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"dev": true
},
"@npmcli/move-file": {
"version": "1.1.2",
"resolved": "https://registry.npmjs.org/@npmcli/move-file/-/move-file-1.1.2.tgz",
"integrity": "sha512-1SUf/Cg2GzGDyaf15aR9St9TWlb+XvbZXWpDx8YKs7MLzMH/BCeopv+y9vzrzgkfykCGuWOlSu3mZhj2+FQcrg==",
"requires": {
"mkdirp": "^1.0.4",
"rimraf": "^3.0.2"
},
"dependencies": {
"mkdirp": {
"version": "1.0.4",
"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
"integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw=="
}
}
},
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"version": "1.1.1",
"resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
@ -461,7 +477,6 @@
"version": "3.1.0",
"resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.1.0.tgz",
"integrity": "sha512-4I7Td01quW/RpocfNayFdFVk1qSuoh0E7JrbRJ16nH01HhKFQ88INq9Sd+nd72zqRySlr9BmDA8xlEJ6vJMrYA==",
"dev": true,
"requires": {
"clean-stack": "^2.0.0",
"indent-string": "^4.0.0"
@ -587,8 +602,7 @@
"balanced-match": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
"integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
"dev": true
"integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
},
"binary-extensions": {
"version": "2.1.0",
@ -600,7 +614,6 @@
"version": "1.1.11",
"resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
"integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
"dev": true,
"requires": {
"balanced-match": "^1.0.0",
"concat-map": "0.0.1"
@ -634,6 +647,45 @@
"node-releases": "^1.1.71"
}
},
"cacache": {
"version": "15.2.0",
"resolved": "https://registry.npmjs.org/cacache/-/cacache-15.2.0.tgz",
"integrity": "sha512-uKoJSHmnrqXgthDFx/IU6ED/5xd+NNGe+Bb+kLZy7Ku4P+BaiWEUflAKPZ7eAzsYGcsAGASJZsybXp+quEcHTw==",
"requires": {
"@npmcli/move-file": "^1.0.1",
"chownr": "^2.0.0",
"fs-minipass": "^2.0.0",
"glob": "^7.1.4",
"infer-owner": "^1.0.4",
"lru-cache": "^6.0.0",
"minipass": "^3.1.1",
"minipass-collect": "^1.0.2",
"minipass-flush": "^1.0.5",
"minipass-pipeline": "^1.2.2",
"mkdirp": "^1.0.3",
"p-map": "^4.0.0",
"promise-inflight": "^1.0.1",
"rimraf": "^3.0.2",
"ssri": "^8.0.1",
"tar": "^6.0.2",
"unique-filename": "^1.1.1"
},
"dependencies": {
"mkdirp": {
"version": "1.0.4",
"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
"integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw=="
},
"p-map": {
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/p-map/-/p-map-4.0.0.tgz",
"integrity": "sha512-/bjOqmgETBYB5BoEeGVea8dmvHb2m9GLy1E9W43yeyfP6QQCZGFNa+XRceJEuDB6zqr+gKpIAmlLebMpykw/MQ==",
"requires": {
"aggregate-error": "^3.0.0"
}
}
}
},
"caching-transform": {
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/caching-transform/-/caching-transform-4.0.0.tgz",
@ -697,6 +749,11 @@
"readdirp": "~3.5.0"
}
},
"chownr": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/chownr/-/chownr-2.0.0.tgz",
"integrity": "sha512-bIomtDF5KGpdogkLd9VspvFzk9KfpyyGlS8YFVZl7TGPBHL5snIOnxeshwVgPteQ9b4Eydl+pVbIyE1DcvCWgQ=="
},
"ci-info": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/ci-info/-/ci-info-2.0.0.tgz",
@ -706,8 +763,7 @@
"clean-stack": {
"version": "2.2.0",
"resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
"integrity": "sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==",
"dev": true
"integrity": "sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A=="
},
"cli-cursor": {
"version": "3.1.0",
@ -805,8 +861,7 @@
"concat-map": {
"version": "0.0.1",
"resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
"integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
"dev": true
"integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
},
"confusing-browser-globals": {
"version": "1.0.9",
@ -1514,11 +1569,18 @@
"integrity": "sha512-cHEpEQHUg0f8XdtZCc2ZAhrHzKzT0MrFUTcvx+hfxYu7rGMDc5SKoXFh+n4YigxsHXRzc6OrCshdR1bWH6HHyg==",
"dev": true
},
"fs-minipass": {
"version": "2.1.0",
"resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-2.1.0.tgz",
"integrity": "sha512-V/JgOLFCS+R6Vcq0slCuaeWEdNC3ouDlJMNIsacH2VtALiu9mV4LPrHc5cDl8k5aw6J8jwgWWpiTo5RYhmIzvg==",
"requires": {
"minipass": "^3.0.0"
}
},
"fs.realpath": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
"integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
"dev": true
"integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
},
"fsevents": {
"version": "2.1.3",
@ -1561,7 +1623,6 @@
"version": "7.1.6",
"resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
"integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
"dev": true,
"requires": {
"fs.realpath": "^1.0.0",
"inflight": "^1.0.4",
@ -1805,20 +1866,22 @@
"imurmurhash": {
"version": "0.1.4",
"resolved": "https://registry.npmjs.org/imurmurhash/-/imurmurhash-0.1.4.tgz",
"integrity": "sha1-khi5srkoojixPcT7a21XbyMUU+o=",
"dev": true
"integrity": "sha1-khi5srkoojixPcT7a21XbyMUU+o="
},
"indent-string": {
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/indent-string/-/indent-string-4.0.0.tgz",
"integrity": "sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==",
"dev": true
"integrity": "sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg=="
},
"infer-owner": {
"version": "1.0.4",
"resolved": "https://registry.npmjs.org/infer-owner/-/infer-owner-1.0.4.tgz",
"integrity": "sha512-IClj+Xz94+d7irH5qRyfJonOdfTzuDaifE6ZPWfx0N0+/ATZCbuTPq2prFl526urkQd90WyUKIh1DfBQ2hMz9A=="
},
"inflight": {
"version": "1.0.6",
"resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
"integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
"dev": true,
"requires": {
"once": "^1.3.0",
"wrappy": "1"
@ -1827,8 +1890,7 @@
"inherits": {
"version": "2.0.4",
"resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
"integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
"dev": true
"integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
},
"inquirer": {
"version": "7.1.0",
@ -2333,6 +2395,14 @@
}
}
},
"lru-cache": {
"version": "6.0.0",
"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
"integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
"requires": {
"yallist": "^4.0.0"
}
},
"make-dir": {
"version": "3.1.0",
"resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
@ -2367,7 +2437,6 @@
"version": "3.0.4",
"resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
"integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
"dev": true,
"requires": {
"brace-expansion": "^1.1.7"
}
@ -2378,6 +2447,47 @@
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"dev": true
},
"minipass": {
"version": "3.1.3",
"resolved": "https://registry.npmjs.org/minipass/-/minipass-3.1.3.tgz",
"integrity": "sha512-Mgd2GdMVzY+x3IJ+oHnVM+KG3lA5c8tnabyJKmHSaG2kAGpudxuOf8ToDkhumF7UzME7DecbQE9uOZhNm7PuJg==",
"requires": {
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}
},
"minipass-collect": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/minipass-collect/-/minipass-collect-1.0.2.tgz",
"integrity": "sha512-6T6lH0H8OG9kITm/Jm6tdooIbogG9e0tLgpY6mphXSm/A9u8Nq1ryBG+Qspiub9LjWlBPsPS3tWQ/Botq4FdxA==",
"requires": {
"minipass": "^3.0.0"
}
},
"minipass-flush": {
"version": "1.0.5",
"resolved": "https://registry.npmjs.org/minipass-flush/-/minipass-flush-1.0.5.tgz",
"integrity": "sha512-JmQSYYpPUqX5Jyn1mXaRwOda1uQ8HP5KAT/oDSLCzt1BYRhQU0/hDtsB1ufZfEEzMZ9aAVmsBw8+FWsIXlClWw==",
"requires": {
"minipass": "^3.0.0"
}
},
"minipass-pipeline": {
"version": "1.2.4",
"resolved": "https://registry.npmjs.org/minipass-pipeline/-/minipass-pipeline-1.2.4.tgz",
"integrity": "sha512-xuIq7cIOt09RPRJ19gdi4b+RiNvDFYe5JH+ggNvBqGqpQXcru3PcRmOZuHBKWK1Txf9+cQ+HMVN4d6z46LZP7A==",
"requires": {
"minipass": "^3.0.0"
}
},
"minizlib": {
"version": "2.1.2",
"resolved": "https://registry.npmjs.org/minizlib/-/minizlib-2.1.2.tgz",
"integrity": "sha512-bAxsR8BVfj60DWXHE3u30oHzfl4G7khkSuPW+qvpd7jFRHm7dLxOjUk1EHACJ/hxLY8phGJ0YhYHZo7jil7Qdg==",
"requires": {
"minipass": "^3.0.0",
"yallist": "^4.0.0"
}
},
"mkdirp": {
"version": "0.5.5",
"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
@ -2824,7 +2934,6 @@
"version": "1.4.0",
"resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
"integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
"dev": true,
"requires": {
"wrappy": "1"
}
@ -2936,8 +3045,7 @@
"path-is-absolute": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
"integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
"dev": true
"integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18="
},
"path-key": {
"version": "2.0.1",
@ -3011,6 +3119,11 @@
"integrity": "sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==",
"dev": true
},
"promise-inflight": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/promise-inflight/-/promise-inflight-1.0.1.tgz",
"integrity": "sha1-mEcocL8igTL8vdhoEputEsPAKeM="
},
"punycode": {
"version": "2.1.1",
"resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
@ -3112,7 +3225,6 @@
"version": "3.0.2",
"resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
"integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
"dev": true,
"requires": {
"glob": "^7.1.3"
}
@ -3295,6 +3407,14 @@
"integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
"dev": true
},
"ssri": {
"version": "8.0.1",
"resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
"integrity": "sha512-97qShzy1AiyxvPNIkLWoGua7xoQzzPjQ0HAH4B0rWKo7SZ6USuPcrUiAFrws0UH8RrbWmgq3LMTObhPIHbbBeQ==",
"requires": {
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}
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"string-width": {
"version": "4.2.0",
"resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
@ -3434,6 +3554,26 @@
}
}
},
"tar": {
"version": "6.1.0",
"resolved": "https://registry.npmjs.org/tar/-/tar-6.1.0.tgz",
"integrity": "sha512-DUCttfhsnLCjwoDoFcI+B2iJgYa93vBnDUATYEeRx6sntCTdN01VnqsIuTlALXla/LWooNg0yEGeB+Y8WdFxGA==",
"requires": {
"chownr": "^2.0.0",
"fs-minipass": "^2.0.0",
"minipass": "^3.0.0",
"minizlib": "^2.1.1",
"mkdirp": "^1.0.3",
"yallist": "^4.0.0"
},
"dependencies": {
"mkdirp": {
"version": "1.0.4",
"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
"integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw=="
}
}
},
"test-exclude": {
"version": "6.0.0",
"resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
@ -3511,6 +3651,22 @@
"is-typedarray": "^1.0.0"
}
},
"unique-filename": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
"integrity": "sha512-Vmp0jIp2ln35UTXuryvjzkjGdRyf9b2lTXuSYUiPmzRcl3FDtYqAwOnTJkAngD9SWhnoJzDbTKwaOrZ+STtxNQ==",
"requires": {
"unique-slug": "^2.0.0"
}
},
"unique-slug": {
"version": "2.0.2",
"resolved": "https://registry.npmjs.org/unique-slug/-/unique-slug-2.0.2.tgz",
"integrity": "sha512-zoWr9ObaxALD3DOPfjPSqxt4fnZiWblxHIgeWqW8x7UqDzEtHEQLzji2cuJYQFCU6KmoJikOYAZlrTHHebjx2w==",
"requires": {
"imurmurhash": "^0.1.4"
}
},
"uri-js": {
"version": "4.2.2",
"resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
@ -3656,8 +3812,7 @@
"wrappy": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
"integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
"dev": true
"integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
},
"write": {
"version": "1.0.3",
@ -3686,6 +3841,11 @@
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"dev": true
},
"yallist": {
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
"integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
},
"yaml": {
"version": "1.10.0",
"resolved": "https://registry.npmjs.org/yaml/-/yaml-1.10.0.tgz",

1
package.json
View File

@ -38,6 +38,7 @@
"rimraf": "^3.0.2"
},
"dependencies": {
"cacache": "^15.2.0",
"node-fetch": "2.6.1"
},
"husky": {

18
test/tests.js
View File

@ -447,4 +447,22 @@ describe('File system cache tests', function() {
assert.strictEqual(expectedPngBuffer.equals(body), true);
assert.strictEqual(res.fromCache, true);
});
it('Can eject from cache', async function() {
cachedFetch = FetchCache.withCache(new FileSystemCache());
res = await cachedFetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, false);
res = await cachedFetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, true);
await res.ejectFromCache();
res = await cachedFetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, false);
res = await cachedFetch(TWO_HUNDRED_URL);
assert.strictEqual(res.fromCache, true);
});
});