first commit

packages/core/file-transfer.mjs

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+import {z} from 'zod';
+import transfer from './file-transfer.cjs';
+export const {TYPES,safeFilename,detectType,inspectFileTransfer}=transfer;
+const DirectionSchema=z.object({maxBytes:z.number().int().min(1).max(20*1024*1024).default(20*1024*1024),allowTypes:z.array(z.enum(TYPES)).max(TYPES.length).default([]),blockedTypes:z.array(z.enum(TYPES)).max(TYPES.length).default([]),blockUnknown:z.boolean().default(false),blockExtensionMismatch:z.boolean().default(false),blockMimeMismatch:z.boolean().default(false),allowWithoutMalwareScanner:z.boolean().default(false)}).strict();
+export const FileTransfersSchema=z.object({upload:DirectionSchema.prefault({}),download:DirectionSchema.prefault({})}).strict();