58 lines
1.8 KiB
TypeScript
58 lines
1.8 KiB
TypeScript
import * as path from 'node:path';
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export interface UploadMetadata {
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snowflakeId?: string;
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userId?: string;
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originalName?: string;
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[k: string]: string | undefined;
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}
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/** Parse the comma-separated `Upload-Metadata` header into a flat object. */
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export function parseUploadMetadata(raw: string | null | undefined): UploadMetadata {
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if (!raw) return {};
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const out: UploadMetadata = {};
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for (const pair of raw.split(',')) {
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const trimmed = pair.trim();
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if (!trimmed) continue;
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const [key, b64] = trimmed.split(' ');
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if (!key) continue;
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if (!b64) {
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// Boolean-style key (no value)
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continue;
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}
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try {
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const decoded = Buffer.from(b64, 'base64').toString('utf8');
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// Reject if base64 round-trip mismatches — protects against odd encodings
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if (Buffer.from(decoded, 'utf8').toString('base64').replace(/=+$/, '') !==
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b64.replace(/=+$/, '')) continue;
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out[key] = decoded;
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} catch { /* ignore */ }
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}
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return out;
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}
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/** Extract a sanitized lowercase extension, stripped of path components. */
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export function extractExtension(originalName: string): string {
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const base = path.basename(originalName);
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const ext = path.extname(base).toLowerCase();
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return ext;
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}
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/** Build the metadata object stored on tus uploads at PRE_CREATE. */
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export function buildTusMetadata(input: {
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snowflakeId: string;
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userId: string;
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originalName: string;
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}): UploadMetadata {
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return {
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snowflakeId: input.snowflakeId,
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userId: input.userId,
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originalName: input.originalName,
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};
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}
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/** True iff the supplied userId matches metadata.userId. Used in PRE_PATCH. */
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export function isOwnerOfUpload(metadata: UploadMetadata, userId: string): boolean {
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return Boolean(metadata.userId) && metadata.userId === userId;
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}
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