klz-cables.com/.pnpm-store/v10/files/3a/6dda575df29dc826c8fafa45c6a99700c066fbf6f117a63d3f809d8234a2c84bcf87a3bcf8d7d9c7c7ee90dc0a97f974693c1d98dff7486df8700e3d564da7

import parseRange from 'range-parser';
/**
 * Parses HTTP Range header according to RFC 7233
 *
 * @returns Result object indicating whether to serve full file, partial content, or invalid range
 */ export function parseRangeHeader({ fileSize, rangeHeader }) {
    // No Range header - serve full file
    if (!rangeHeader) {
        return {
            type: 'full',
            range: null
        };
    }
    const result = parseRange(fileSize, rangeHeader);
    // Invalid range syntax or unsatisfiable range
    if (result === -1 || result === -2) {
        return {
            type: 'invalid',
            range: null
        };
    }
    // Must be bytes range type
    if (result.type !== 'bytes' || result.length === 0) {
        return {
            type: 'invalid',
            range: null
        };
    }
    // Multi-range requests: use first range only (standard simplification)
    const range = result[0];
    if (!range) {
        return {
            type: 'invalid',
            range: null
        };
    }
    return {
        type: 'partial',
        range: {
            end: range.end,
            start: range.start
        }
    };
}

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