530 lines
18 KiB
TypeScript
530 lines
18 KiB
TypeScript
import {
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ALLOWED_MIME_TYPES,
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FORBIDDEN_FILE_EXTENSIONS,
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VIDEO_EXTENSIONS,
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type VideoExtension,
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type AllowedMimeType
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} from './constants'
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import { getSetting, setSetting } from './db'
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import { getActiveBackendRow } from './storage/resolver'
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import { TELEGRAM_MAX_FILE_BYTES } from './storage/telegram'
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export const SETTINGS_UPLOAD_MAX_FILE_SIZE_MB = 'upload_max_file_size_mb'
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export const SETTINGS_ALLOWED_MIME_TYPES = 'allowed_mime_types'
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export const SETTINGS_ALLOWED_VIDEO_EXTENSIONS = 'allowed_video_extensions'
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export const SETTINGS_FORBIDDEN_FILE_EXTENSIONS = 'forbidden_file_extensions'
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export const SETTINGS_UPLOAD_RATE_IP_MAX = 'upload_rate_ip_max'
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export const SETTINGS_UPLOAD_RATE_TOKEN_MAX = 'upload_rate_token_max'
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export const SETTINGS_UPLOAD_RATE_WINDOW_MINUTES = 'upload_rate_window_minutes'
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export const SETTINGS_LOGIN_RATE_MAX = 'login_rate_max'
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export const SETTINGS_LOGIN_RATE_WINDOW_MINUTES = 'login_rate_window_minutes'
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export const SETTINGS_PRESERVE_ORIGINAL_UPLOAD = 'preserve_original_upload'
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export const DEFAULT_UPLOAD_MAX_FILE_SIZE_MB = 10
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export const MIN_UPLOAD_MAX_FILE_SIZE_MB = 1
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export const MAX_UPLOAD_MAX_FILE_SIZE_MB = 100
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export const DEFAULT_UPLOAD_RATE_IP_MAX = 60
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export const DEFAULT_UPLOAD_RATE_TOKEN_MAX = 120
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export const DEFAULT_UPLOAD_RATE_WINDOW_MINUTES = 15
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export const MIN_UPLOAD_RATE_MAX = 1
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export const MAX_UPLOAD_RATE_IP_MAX = 1000
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export const MAX_UPLOAD_RATE_TOKEN_MAX = 5000
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export const MIN_RATE_WINDOW_MINUTES = 1
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export const MAX_RATE_WINDOW_MINUTES = 1440
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export const DEFAULT_LOGIN_RATE_MAX = 10
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export const DEFAULT_LOGIN_RATE_WINDOW_MINUTES = 15
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export const MAX_LOGIN_RATE_MAX = 100
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export const ALL_MIME_TYPE_OPTIONS = [
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{ mime: 'image/jpeg', label: 'JPEG' },
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{ mime: 'image/png', label: 'PNG' },
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{ mime: 'image/webp', label: 'WebP' },
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{ mime: 'image/gif', label: 'GIF' },
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{ mime: 'image/svg+xml', label: 'SVG' },
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{ mime: 'image/x-icon', label: 'ICO' }
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] as const satisfies ReadonlyArray<{ mime: AllowedMimeType, label: string }>
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export const ALL_VIDEO_EXTENSION_OPTIONS = VIDEO_EXTENSIONS.map(extension => ({
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extension,
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label: extension.toUpperCase()
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}))
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export const FORBIDDEN_FILE_EXTENSION_OPTIONS = [
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'html',
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'htm',
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'xhtml',
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'svg',
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'xml',
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'js',
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'mjs',
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'cjs',
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'php',
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'phtml',
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'sh',
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'bash',
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'zsh',
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'bat',
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'cmd',
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'ps1',
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'exe',
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'dll',
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'msi',
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'scr'
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].map(extension => ({
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extension,
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label: extension.toUpperCase()
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}))
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export type PolicySource = 'env' | 'db' | 'default'
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function readEnv(name: string): string {
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try {
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return process.env[name]?.trim() ?? ''
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} catch {
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return ''
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}
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}
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function parsePositiveInt(raw: string, min: number, max: number): number | null {
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const trimmed = raw.trim()
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if (!trimmed) return null
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const value = Number(trimmed)
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if (!Number.isFinite(value) || !Number.isInteger(value)) return null
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if (value < min || value > max) return null
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return value
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}
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export function parseUploadMaxFileSizeMb(raw: string): number | null {
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return parsePositiveInt(raw, MIN_UPLOAD_MAX_FILE_SIZE_MB, MAX_UPLOAD_MAX_FILE_SIZE_MB)
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}
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export function parseUploadRateIpMax(raw: string): number | null {
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return parsePositiveInt(raw, MIN_UPLOAD_RATE_MAX, MAX_UPLOAD_RATE_IP_MAX)
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}
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export function parseUploadRateTokenMax(raw: string): number | null {
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return parsePositiveInt(raw, MIN_UPLOAD_RATE_MAX, MAX_UPLOAD_RATE_TOKEN_MAX)
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}
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export function parseUploadRateWindowMinutes(raw: string): number | null {
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return parsePositiveInt(raw, MIN_RATE_WINDOW_MINUTES, MAX_RATE_WINDOW_MINUTES)
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}
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export function parseLoginRateMax(raw: string): number | null {
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return parsePositiveInt(raw, MIN_UPLOAD_RATE_MAX, MAX_LOGIN_RATE_MAX)
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}
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export function parseLoginRateWindowMinutes(raw: string): number | null {
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return parsePositiveInt(raw, MIN_RATE_WINDOW_MINUTES, MAX_RATE_WINDOW_MINUTES)
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}
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export function parsePreserveOriginalUpload(raw: string): boolean | null {
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const trimmed = raw.trim().toLowerCase()
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if (!trimmed) return null
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if (trimmed === 'true' || trimmed === '1' || trimmed === 'yes') return true
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if (trimmed === 'false' || trimmed === '0' || trimmed === 'no') return false
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return null
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}
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export function serializePreserveOriginalUpload(value: boolean): string {
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return value ? 'true' : 'false'
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}
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export function normalizeAllowedMimeTypes(raw: string): AllowedMimeType[] {
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const allowedSet = new Set<string>(ALLOWED_MIME_TYPES)
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const seen = new Set<string>()
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const result: AllowedMimeType[] = []
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for (const part of raw.split(',')) {
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const mime = part.trim().toLowerCase()
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if (!mime || seen.has(mime) || !allowedSet.has(mime)) continue
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seen.add(mime)
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result.push(mime as AllowedMimeType)
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}
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return result
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}
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export function serializeAllowedMimeTypes(mimes: readonly string[]): string {
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const normalized = new Set(normalizeAllowedMimeTypes(mimes.join(',')))
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return ALL_MIME_TYPE_OPTIONS
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.map(option => option.mime)
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.filter(mime => normalized.has(mime))
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.join(',')
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}
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export function normalizeAllowedVideoExtensions(raw: string): VideoExtension[] {
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const allowedSet = new Set<string>(VIDEO_EXTENSIONS)
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const seen = new Set<string>()
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const result: VideoExtension[] = []
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for (const part of raw.split(',')) {
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const extension = part.trim().toLowerCase().replace(/^\.+/, '')
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if (!extension || seen.has(extension) || !allowedSet.has(extension)) continue
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seen.add(extension)
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result.push(extension as VideoExtension)
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}
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return result
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}
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export function serializeAllowedVideoExtensions(extensions: readonly string[]): string {
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const normalized = new Set(normalizeAllowedVideoExtensions(extensions.join(',')))
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return VIDEO_EXTENSIONS
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.filter(extension => normalized.has(extension))
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.join(',')
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}
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export function normalizeForbiddenFileExtensions(raw: string): string[] {
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const seen = new Set<string>()
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const result: string[] = []
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for (const part of raw.split(',')) {
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const extension = part
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.trim()
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.toLowerCase()
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.replace(/^\.+/, '')
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if (!extension || seen.has(extension)) continue
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if (!/^[a-z0-9][a-z0-9_-]{0,15}$/.test(extension)) continue
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seen.add(extension)
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result.push(extension)
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}
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return result
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}
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export function serializeForbiddenFileExtensions(extensions: readonly string[]): string {
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const configuredOrder = new Map(
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FORBIDDEN_FILE_EXTENSION_OPTIONS.map((option, index) => [option.extension, index])
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)
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return normalizeForbiddenFileExtensions(extensions.join(','))
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.sort((left, right) => {
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const leftOrder = configuredOrder.get(left)
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const rightOrder = configuredOrder.get(right)
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if (leftOrder !== undefined || rightOrder !== undefined) {
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return (leftOrder ?? Number.MAX_SAFE_INTEGER)
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- (rightOrder ?? Number.MAX_SAFE_INTEGER)
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}
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return left.localeCompare(right)
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})
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.join(',')
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}
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function getUploadMaxFileSizeMbSource(): PolicySource {
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if (getSetting(SETTINGS_UPLOAD_MAX_FILE_SIZE_MB) !== null) return 'db'
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if (parseUploadMaxFileSizeMb(readEnv('UPLOAD_MAX_FILE_SIZE_MB')) !== null) return 'env'
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return 'default'
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}
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function getAllowedVideoExtensionsSource(): PolicySource {
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if (getSetting(SETTINGS_ALLOWED_VIDEO_EXTENSIONS) !== null) return 'db'
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if (normalizeAllowedVideoExtensions(readEnv('ALLOWED_VIDEO_EXTENSIONS')).length > 0) {
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return 'env'
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}
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return 'default'
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}
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function getForbiddenFileExtensionsSource(): PolicySource {
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if (getSetting(SETTINGS_FORBIDDEN_FILE_EXTENSIONS) !== null) return 'db'
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if (readEnv('FORBIDDEN_FILE_EXTENSIONS')) return 'env'
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return 'default'
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}
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function getAllowedMimeTypesSource(): PolicySource {
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if (getSetting(SETTINGS_ALLOWED_MIME_TYPES) !== null) return 'db'
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if (normalizeAllowedMimeTypes(readEnv('ALLOWED_MIME_TYPES')).length > 0) return 'env'
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return 'default'
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}
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function getUploadRateIpMaxSource(): PolicySource {
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if (getSetting(SETTINGS_UPLOAD_RATE_IP_MAX) !== null) return 'db'
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if (parseUploadRateIpMax(readEnv('UPLOAD_RATE_IP_MAX')) !== null) return 'env'
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return 'default'
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}
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function getUploadRateTokenMaxSource(): PolicySource {
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if (getSetting(SETTINGS_UPLOAD_RATE_TOKEN_MAX) !== null) return 'db'
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if (parseUploadRateTokenMax(readEnv('UPLOAD_RATE_TOKEN_MAX')) !== null) return 'env'
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return 'default'
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}
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function getUploadRateWindowMinutesSource(): PolicySource {
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if (getSetting(SETTINGS_UPLOAD_RATE_WINDOW_MINUTES) !== null) return 'db'
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if (parseUploadRateWindowMinutes(readEnv('UPLOAD_RATE_WINDOW_MINUTES')) !== null) return 'env'
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return 'default'
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}
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function getLoginRateMaxSource(): PolicySource {
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if (getSetting(SETTINGS_LOGIN_RATE_MAX) !== null) return 'db'
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if (parseLoginRateMax(readEnv('LOGIN_RATE_MAX')) !== null) return 'env'
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return 'default'
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}
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function getLoginRateWindowMinutesSource(): PolicySource {
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if (getSetting(SETTINGS_LOGIN_RATE_WINDOW_MINUTES) !== null) return 'db'
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if (parseLoginRateWindowMinutes(readEnv('LOGIN_RATE_WINDOW_MINUTES')) !== null) return 'env'
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return 'default'
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}
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function getPreserveOriginalUploadSource(): PolicySource {
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if (getSetting(SETTINGS_PRESERVE_ORIGINAL_UPLOAD) !== null) return 'db'
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if (parsePreserveOriginalUpload(readEnv('PRESERVE_ORIGINAL_UPLOAD')) !== null) return 'env'
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return 'default'
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}
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export function getUploadMaxFileSizeMb(): number {
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const dbRaw = getSetting(SETTINGS_UPLOAD_MAX_FILE_SIZE_MB)
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if (dbRaw !== null) {
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const parsed = parseUploadMaxFileSizeMb(dbRaw)
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if (parsed !== null) return parsed
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}
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const fromEnv = parseUploadMaxFileSizeMb(readEnv('UPLOAD_MAX_FILE_SIZE_MB'))
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if (fromEnv !== null) return fromEnv
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return DEFAULT_UPLOAD_MAX_FILE_SIZE_MB
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}
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export function getMaxFileSizeBytes(): number {
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return getUploadMaxFileSizeMb() * 1024 * 1024
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}
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export function getEffectiveMaxFileSizeBytes(): number {
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const configured = getMaxFileSizeBytes()
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const row = getActiveBackendRow()
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if (row?.type === 'telegram') {
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return Math.min(configured, TELEGRAM_MAX_FILE_BYTES)
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}
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return configured
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}
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export function getAllowedMimeTypesList(): AllowedMimeType[] {
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const dbRaw = getSetting(SETTINGS_ALLOWED_MIME_TYPES)
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if (dbRaw !== null) {
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const parsed = normalizeAllowedMimeTypes(dbRaw)
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if (parsed.length > 0) return parsed
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}
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const fromEnv = normalizeAllowedMimeTypes(readEnv('ALLOWED_MIME_TYPES'))
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if (fromEnv.length > 0) return fromEnv
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return [...ALLOWED_MIME_TYPES]
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}
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export function getAllowedVideoExtensions(): VideoExtension[] {
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const dbRaw = getSetting(SETTINGS_ALLOWED_VIDEO_EXTENSIONS)
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if (dbRaw !== null) {
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const parsed = normalizeAllowedVideoExtensions(dbRaw)
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if (parsed.length > 0) return parsed
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}
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const fromEnv = normalizeAllowedVideoExtensions(readEnv('ALLOWED_VIDEO_EXTENSIONS'))
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if (fromEnv.length > 0) return fromEnv
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return [...VIDEO_EXTENSIONS]
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}
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export function getForbiddenFileExtensions(): string[] {
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const dbRaw = getSetting(SETTINGS_FORBIDDEN_FILE_EXTENSIONS)
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if (dbRaw !== null) return normalizeForbiddenFileExtensions(dbRaw)
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const envRaw = readEnv('FORBIDDEN_FILE_EXTENSIONS')
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if (envRaw) return normalizeForbiddenFileExtensions(envRaw)
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return [...FORBIDDEN_FILE_EXTENSIONS]
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}
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export function isVideoExtensionAllowed(extension: string): boolean {
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const normalized = extension.trim().toLowerCase().replace(/^\.+/, '')
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return getAllowedVideoExtensions().includes(normalized as VideoExtension)
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}
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export function isForbiddenFileExtension(extension: string): boolean {
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const normalized = extension.trim().toLowerCase().replace(/^\.+/, '')
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return Boolean(normalized) && getForbiddenFileExtensions().includes(normalized)
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}
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export function isMimeTypeAllowed(mime: string): mime is AllowedMimeType {
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return getAllowedMimeTypesList().includes(mime as AllowedMimeType)
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}
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export function isPreserveOriginalUpload(): boolean {
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const dbRaw = getSetting(SETTINGS_PRESERVE_ORIGINAL_UPLOAD)
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if (dbRaw !== null) {
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const parsed = parsePreserveOriginalUpload(dbRaw)
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if (parsed !== null) return parsed
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}
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const fromEnv = parsePreserveOriginalUpload(readEnv('PRESERVE_ORIGINAL_UPLOAD'))
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if (fromEnv !== null) return fromEnv
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return false
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}
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export function getUploadRateLimitSettings(): {
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ipMax: number
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tokenMax: number
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windowMs: number
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} {
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const ipMax = (() => {
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const dbRaw = getSetting(SETTINGS_UPLOAD_RATE_IP_MAX)
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if (dbRaw !== null) {
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const parsed = parseUploadRateIpMax(dbRaw)
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if (parsed !== null) return parsed
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}
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return parseUploadRateIpMax(readEnv('UPLOAD_RATE_IP_MAX')) ?? DEFAULT_UPLOAD_RATE_IP_MAX
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})()
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const tokenMax = (() => {
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const dbRaw = getSetting(SETTINGS_UPLOAD_RATE_TOKEN_MAX)
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if (dbRaw !== null) {
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const parsed = parseUploadRateTokenMax(dbRaw)
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if (parsed !== null) return parsed
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}
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return parseUploadRateTokenMax(readEnv('UPLOAD_RATE_TOKEN_MAX')) ?? DEFAULT_UPLOAD_RATE_TOKEN_MAX
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})()
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const windowMinutes = (() => {
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const dbRaw = getSetting(SETTINGS_UPLOAD_RATE_WINDOW_MINUTES)
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if (dbRaw !== null) {
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const parsed = parseUploadRateWindowMinutes(dbRaw)
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if (parsed !== null) return parsed
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}
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return parseUploadRateWindowMinutes(readEnv('UPLOAD_RATE_WINDOW_MINUTES'))
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?? DEFAULT_UPLOAD_RATE_WINDOW_MINUTES
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})()
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return {
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ipMax,
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tokenMax,
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windowMs: windowMinutes * 60 * 1000
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}
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}
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export function getLoginRateLimitSettings(): {
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max: number
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windowMs: number
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} {
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const max = (() => {
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const dbRaw = getSetting(SETTINGS_LOGIN_RATE_MAX)
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if (dbRaw !== null) {
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const parsed = parseLoginRateMax(dbRaw)
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if (parsed !== null) return parsed
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}
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return parseLoginRateMax(readEnv('LOGIN_RATE_MAX')) ?? DEFAULT_LOGIN_RATE_MAX
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})()
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const windowMinutes = (() => {
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const dbRaw = getSetting(SETTINGS_LOGIN_RATE_WINDOW_MINUTES)
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if (dbRaw !== null) {
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const parsed = parseLoginRateWindowMinutes(dbRaw)
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if (parsed !== null) return parsed
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}
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return parseLoginRateWindowMinutes(readEnv('LOGIN_RATE_WINDOW_MINUTES'))
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?? DEFAULT_LOGIN_RATE_WINDOW_MINUTES
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})()
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return {
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max,
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windowMs: windowMinutes * 60 * 1000
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}
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}
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export function formatMaxFileSizeMessage(): string {
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return `图片大小不能超过 ${getUploadMaxFileSizeMb()} MB`
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}
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export function formatEffectiveMaxFileSizeMessage(): string {
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const row = getActiveBackendRow()
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if (row?.type === 'telegram') {
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const mb = TELEGRAM_MAX_FILE_BYTES / (1024 * 1024)
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const siteMb = getUploadMaxFileSizeMb()
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if (siteMb * 1024 * 1024 <= TELEGRAM_MAX_FILE_BYTES) {
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return formatMaxFileSizeMessage()
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}
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return `图片大小不能超过 ${mb} MB（Telegram 存储上限）`
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}
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return formatMaxFileSizeMessage()
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}
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export function getUploadPolicySettingsPayload() {
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return {
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uploadMaxFileSizeMb: getUploadMaxFileSizeMb(),
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uploadMaxFileSizeMbSource: getUploadMaxFileSizeMbSource(),
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uploadMaxFileSizeMbEnvFallback: parseUploadMaxFileSizeMb(readEnv('UPLOAD_MAX_FILE_SIZE_MB'))
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?? DEFAULT_UPLOAD_MAX_FILE_SIZE_MB,
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allowedMimeTypes: getAllowedMimeTypesList(),
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allowedMimeTypesSource: getAllowedMimeTypesSource(),
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allowedMimeTypesEnvFallback: normalizeAllowedMimeTypes(readEnv('ALLOWED_MIME_TYPES')),
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allowedVideoExtensions: getAllowedVideoExtensions(),
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allowedVideoExtensionsSource: getAllowedVideoExtensionsSource(),
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allowedVideoExtensionsEnvFallback: normalizeAllowedVideoExtensions(
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readEnv('ALLOWED_VIDEO_EXTENSIONS')
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),
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forbiddenFileExtensions: getForbiddenFileExtensions(),
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forbiddenFileExtensionsSource: getForbiddenFileExtensionsSource(),
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forbiddenFileExtensionsEnvFallback: normalizeForbiddenFileExtensions(
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readEnv('FORBIDDEN_FILE_EXTENSIONS')
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),
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uploadRateIpMax: getUploadRateLimitSettings().ipMax,
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uploadRateIpMaxSource: getUploadRateIpMaxSource(),
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uploadRateTokenMax: getUploadRateLimitSettings().tokenMax,
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uploadRateTokenMaxSource: getUploadRateTokenMaxSource(),
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uploadRateWindowMinutes: getUploadRateLimitSettings().windowMs / (60 * 1000),
|
||
uploadRateWindowMinutesSource: getUploadRateWindowMinutesSource(),
|
||
loginRateMax: getLoginRateLimitSettings().max,
|
||
loginRateMaxSource: getLoginRateMaxSource(),
|
||
loginRateWindowMinutes: getLoginRateLimitSettings().windowMs / (60 * 1000),
|
||
loginRateWindowMinutesSource: getLoginRateWindowMinutesSource(),
|
||
preserveOriginalUpload: isPreserveOriginalUpload(),
|
||
preserveOriginalUploadSource: getPreserveOriginalUploadSource(),
|
||
mimeTypeOptions: ALL_MIME_TYPE_OPTIONS.map(option => ({
|
||
mime: option.mime,
|
||
label: option.label
|
||
})),
|
||
videoExtensionOptions: ALL_VIDEO_EXTENSION_OPTIONS,
|
||
forbiddenFileExtensionOptions: FORBIDDEN_FILE_EXTENSION_OPTIONS
|
||
}
|
||
}
|
||
|
||
export function setUploadPolicySettings(input: {
|
||
uploadMaxFileSizeMb?: number
|
||
allowedMimeTypes?: readonly string[]
|
||
allowedVideoExtensions?: readonly string[]
|
||
forbiddenFileExtensions?: readonly string[]
|
||
uploadRateIpMax?: number
|
||
uploadRateTokenMax?: number
|
||
uploadRateWindowMinutes?: number
|
||
loginRateMax?: number
|
||
loginRateWindowMinutes?: number
|
||
preserveOriginalUpload?: boolean
|
||
}): void {
|
||
if (input.uploadMaxFileSizeMb !== undefined) {
|
||
setSetting(SETTINGS_UPLOAD_MAX_FILE_SIZE_MB, String(input.uploadMaxFileSizeMb))
|
||
}
|
||
if (input.allowedMimeTypes !== undefined) {
|
||
setSetting(SETTINGS_ALLOWED_MIME_TYPES, serializeAllowedMimeTypes(input.allowedMimeTypes))
|
||
}
|
||
if (input.allowedVideoExtensions !== undefined) {
|
||
setSetting(
|
||
SETTINGS_ALLOWED_VIDEO_EXTENSIONS,
|
||
serializeAllowedVideoExtensions(input.allowedVideoExtensions)
|
||
)
|
||
}
|
||
if (input.forbiddenFileExtensions !== undefined) {
|
||
setSetting(
|
||
SETTINGS_FORBIDDEN_FILE_EXTENSIONS,
|
||
serializeForbiddenFileExtensions(input.forbiddenFileExtensions)
|
||
)
|
||
}
|
||
if (input.uploadRateIpMax !== undefined) {
|
||
setSetting(SETTINGS_UPLOAD_RATE_IP_MAX, String(input.uploadRateIpMax))
|
||
}
|
||
if (input.uploadRateTokenMax !== undefined) {
|
||
setSetting(SETTINGS_UPLOAD_RATE_TOKEN_MAX, String(input.uploadRateTokenMax))
|
||
}
|
||
if (input.uploadRateWindowMinutes !== undefined) {
|
||
setSetting(SETTINGS_UPLOAD_RATE_WINDOW_MINUTES, String(input.uploadRateWindowMinutes))
|
||
}
|
||
if (input.loginRateMax !== undefined) {
|
||
setSetting(SETTINGS_LOGIN_RATE_MAX, String(input.loginRateMax))
|
||
}
|
||
if (input.loginRateWindowMinutes !== undefined) {
|
||
setSetting(SETTINGS_LOGIN_RATE_WINDOW_MINUTES, String(input.loginRateWindowMinutes))
|
||
}
|
||
if (input.preserveOriginalUpload !== undefined) {
|
||
setSetting(
|
||
SETTINGS_PRESERVE_ORIGINAL_UPLOAD,
|
||
serializePreserveOriginalUpload(input.preserveOriginalUpload)
|
||
)
|
||
}
|
||
}
|