graphql-upload-ts/dist/validation.d.ts

TypeScript-first middleware and Upload scalar for GraphQL multipart requests (file uploads) with support for Apollo Server, Express, Koa, and more.

import type { UploadOptions } from './process-request';
export interface ValidationResult {
    isValid: boolean;
    error?: string;
}
/**
 * Maximum size for non-file form fields (in bytes).
 * This applies to text fields like 'operations' and 'map' in GraphQL multipart requests.
 * These fields contain JSON data (query, variables, and file mappings).
 * Default: 1MB - sufficient for large GraphQL queries and variable sets.
 */
export declare const DEFAULT_MAX_FIELD_SIZE = 1000000;
/**
 * Maximum size for uploaded files (in bytes).
 * This applies to the actual binary file content being uploaded.
 * Default: 5MB - a reasonable limit for most web applications.
 * Can be overridden per request for larger files (videos, high-res images, etc.).
 */
export declare const DEFAULT_MAX_FILE_SIZE = 5000000;
/**
 * Maximum number of files that can be uploaded in a single request.
 * Default: Infinity - no limit on the number of files.
 * Should be set to a reasonable number in production to prevent abuse.
 */
export declare const DEFAULT_MAX_FILES: number;
export declare function validateOptions(options?: UploadOptions): UploadOptions;
export declare function validateMimeType(mimetype: string, allowedTypes?: string[]): ValidationResult;
export declare function validateFileExtension(filename: string, allowedExtensions?: string[]): ValidationResult;
export declare function sanitizeFilename(filename: string): string;
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