feat!: Use HashStreamValidator for Data Validation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| // Copyright 2022 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| import {createHash, Hash} from 'crypto'; | ||
| import {Transform} from 'stream'; | ||
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| import { | ||
| CRC32CValidatorGenerator, | ||
| CRC32C_DEFAULT_VALIDATOR_GENERATOR, | ||
| CRC32CValidator, | ||
| } from './crc32c'; | ||
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| interface HashStreamValidatorOptions { | ||
| crc32c: boolean; | ||
| md5: boolean; | ||
| crc32cGenerator: CRC32CValidatorGenerator; | ||
| } | ||
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| class HashStreamValidator extends Transform { | ||
| readonly crc32cEnabled: boolean; | ||
| readonly md5Enabled: boolean; | ||
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| #crc32cHash?: CRC32CValidator = undefined; | ||
| #md5Hash?: Hash = undefined; | ||
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| #md5Digest = ''; | ||
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| constructor(options: Partial<HashStreamValidatorOptions> = {}) { | ||
| super(); | ||
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| this.crc32cEnabled = !!options.crc32c; | ||
| this.md5Enabled = !!options.md5; | ||
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| if (this.crc32cEnabled) { | ||
| const crc32cGenerator = | ||
| options.crc32cGenerator || CRC32C_DEFAULT_VALIDATOR_GENERATOR; | ||
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| this.#crc32cHash = crc32cGenerator(); | ||
| } | ||
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| if (this.md5Enabled) { | ||
| this.#md5Hash = createHash('md5'); | ||
| } | ||
| } | ||
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| _flush(callback: () => void) { | ||
|
There was a problem hiding this comment. Might be good to also just mark these functions with There was a problem hiding this comment. Wanted to, but TS doesn’t like it as the parent class has it |
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| if (this.#md5Hash) { | ||
| this.#md5Digest = this.#md5Hash.digest('base64'); | ||
| } | ||
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| callback(); | ||
| } | ||
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| _transform( | ||
| chunk: Buffer, | ||
| encoding: BufferEncoding, | ||
| callback: (e?: Error) => void | ||
| ) { | ||
| this.push(chunk, encoding); | ||
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| try { | ||
| if (this.#crc32cHash) this.#crc32cHash.update(chunk); | ||
| if (this.#md5Hash) this.#md5Hash.update(chunk); | ||
| callback(); | ||
| } catch (e) { | ||
| callback(e as Error); | ||
| } | ||
| } | ||
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| test(hash: 'crc32c' | 'md5', sum: Buffer | string): boolean { | ||
| const check = Buffer.isBuffer(sum) ? sum.toString('base64') : sum; | ||
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| if (hash === 'crc32c' && this.#crc32cHash) { | ||
| return this.#crc32cHash.validate(check); | ||
| } | ||
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| if (hash === 'md5' && this.#md5Hash) { | ||
| return this.#md5Digest === check; | ||
| } | ||
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| return false; | ||
| } | ||
| } | ||
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| export {HashStreamValidator, HashStreamValidatorOptions}; | ||
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Is there a reason to look to the bucket if one is not passed as an option? Should there be a default within the File class?
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It appears all
Files must have a bucket (looking at the construction) and all buckets have a generator (whether custom or the default) - this way customers can set things at a storage, bucket, or per-object level