29 lines
709 B
TypeScript
29 lines
709 B
TypeScript
import type { BlockBlobClient } from '@azure/storage-blob'
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import parseRange from 'range-parser'
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const getRangeFromHeader = async (
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blockBlobClient: BlockBlobClient,
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rangeHeader?: string,
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): Promise<{ end: number | undefined; start: number }> => {
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const fullRange = { end: undefined, start: 0 }
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if (!rangeHeader) {
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return fullRange
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}
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const size = await blockBlobClient.getProperties().then((props) => props.contentLength)
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if (size === undefined) {
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return fullRange
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}
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const range = parseRange(size, rangeHeader)
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if (range === -1 || range === -2 || range.type !== 'bytes' || range.length !== 1) {
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return fullRange
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}
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return range[0]
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}
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export default getRangeFromHeader
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