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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| const MAX_SHORT_STRING = require("./wasm-hash").MAX_SHORT_STRING; | ||
|
|
||
| class BatchedHash { | ||
| constructor(hash) { | ||
| this.string = undefined; | ||
| this.encoding = undefined; | ||
| this.hash = hash; | ||
| } | ||
|
|
||
| /** | ||
| * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding} | ||
| * @param {string|Buffer} data data | ||
| * @param {string=} inputEncoding data encoding | ||
| * @returns {this} updated hash | ||
| */ | ||
| update(data, inputEncoding) { | ||
| if (this.string !== undefined) { | ||
| if ( | ||
| typeof data === "string" && | ||
| inputEncoding === this.encoding && | ||
| this.string.length + data.length < MAX_SHORT_STRING | ||
| ) { | ||
| this.string += data; | ||
|
|
||
| return this; | ||
| } | ||
|
|
||
| this.hash.update(this.string, this.encoding); | ||
| this.string = undefined; | ||
| } | ||
|
|
||
| if (typeof data === "string") { | ||
| if ( | ||
| data.length < MAX_SHORT_STRING && | ||
| // base64 encoding is not valid since it may contain padding chars | ||
| (!inputEncoding || !inputEncoding.startsWith("ba")) | ||
| ) { | ||
| this.string = data; | ||
| this.encoding = inputEncoding; | ||
| } else { | ||
| this.hash.update(data, inputEncoding); | ||
| } | ||
| } else { | ||
| this.hash.update(data); | ||
| } | ||
|
|
||
| return this; | ||
| } | ||
|
|
||
| /** | ||
| * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding} | ||
| * @param {string=} encoding encoding of the return value | ||
| * @returns {string|Buffer} digest | ||
| */ | ||
| digest(encoding) { | ||
| if (this.string !== undefined) { | ||
| this.hash.update(this.string, this.encoding); | ||
| } | ||
|
|
||
| return this.hash.digest(encoding); | ||
| } | ||
| } | ||
|
|
||
| module.exports = BatchedHash; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| const BULK_SIZE = 2000; | ||
|
|
||
| // We are using an object instead of a Map as this will stay static during the runtime | ||
| // so access to it can be optimized by v8 | ||
| const digestCaches = {}; | ||
|
|
||
| class BulkUpdateDecorator { | ||
| /** | ||
| * @param {Hash | function(): Hash} hashOrFactory function to create a hash | ||
| * @param {string=} hashKey key for caching | ||
| */ | ||
| constructor(hashOrFactory, hashKey) { | ||
| this.hashKey = hashKey; | ||
|
|
||
| if (typeof hashOrFactory === "function") { | ||
| this.hashFactory = hashOrFactory; | ||
| this.hash = undefined; | ||
| } else { | ||
| this.hashFactory = undefined; | ||
| this.hash = hashOrFactory; | ||
| } | ||
|
|
||
| this.buffer = ""; | ||
| } | ||
|
|
||
| /** | ||
| * Update hash {@link https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding} | ||
| * @param {string|Buffer} data data | ||
| * @param {string=} inputEncoding data encoding | ||
| * @returns {this} updated hash | ||
| */ | ||
| update(data, inputEncoding) { | ||
| if ( | ||
| inputEncoding !== undefined || | ||
| typeof data !== "string" || | ||
| data.length > BULK_SIZE | ||
| ) { | ||
| if (this.hash === undefined) { | ||
| this.hash = this.hashFactory(); | ||
| } | ||
|
|
||
| if (this.buffer.length > 0) { | ||
| this.hash.update(this.buffer); | ||
| this.buffer = ""; | ||
| } | ||
|
|
||
| this.hash.update(data, inputEncoding); | ||
| } else { | ||
| this.buffer += data; | ||
|
|
||
| if (this.buffer.length > BULK_SIZE) { | ||
| if (this.hash === undefined) { | ||
| this.hash = this.hashFactory(); | ||
| } | ||
|
|
||
| this.hash.update(this.buffer); | ||
| this.buffer = ""; | ||
| } | ||
| } | ||
|
|
||
| return this; | ||
| } | ||
|
|
||
| /** | ||
| * Calculates the digest {@link https://nodejs.org/api/crypto.html#crypto_hash_digest_encoding} | ||
| * @param {string=} encoding encoding of the return value | ||
| * @returns {string|Buffer} digest | ||
| */ | ||
| digest(encoding) { | ||
| let digestCache; | ||
|
|
||
| const buffer = this.buffer; | ||
|
|
||
| if (this.hash === undefined) { | ||
| // short data for hash, we can use caching | ||
| const cacheKey = `${this.hashKey}-${encoding}`; | ||
|
|
||
| digestCache = digestCaches[cacheKey]; | ||
|
|
||
| if (digestCache === undefined) { | ||
| digestCache = digestCaches[cacheKey] = new Map(); | ||
| } | ||
|
|
||
| const cacheEntry = digestCache.get(buffer); | ||
|
|
||
| if (cacheEntry !== undefined) { | ||
| return cacheEntry; | ||
| } | ||
|
|
||
| this.hash = this.hashFactory(); | ||
| } | ||
|
|
||
| if (buffer.length > 0) { | ||
| this.hash.update(buffer); | ||
| } | ||
|
|
||
| const digestResult = this.hash.digest(encoding); | ||
|
|
||
| if (digestCache !== undefined) { | ||
| digestCache.set(buffer, digestResult); | ||
| } | ||
|
|
||
| return digestResult; | ||
| } | ||
| } | ||
|
|
||
| module.exports = BulkUpdateDecorator; |
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