249 lines
7.8 KiB
TypeScript
249 lines
7.8 KiB
TypeScript
// Generated by dts-bundle-generator v6.3.0
|
|
|
|
import { NextFunction, Request, RequestHandler, Response } from 'express';
|
|
|
|
/**
|
|
* Callback that fires when a client's hit counter is incremented.
|
|
*
|
|
* @param error {Error | undefined} - The error that occurred, if any
|
|
* @param totalHits {number} - The number of hits for that client so far
|
|
* @param resetTime {Date | undefined} - The time when the counter resets
|
|
*/
|
|
export declare type IncrementCallback = (error: Error | undefined, totalHits: number, resetTime: Date | undefined) => void;
|
|
/**
|
|
* Method (in the form of middleware) to generate/retrieve a value based on the
|
|
* incoming request
|
|
*
|
|
* @param request {Request} - The Express request object
|
|
* @param response {Response} - The Express response object
|
|
*
|
|
* @returns {T} - The value needed
|
|
*/
|
|
export declare type ValueDeterminingMiddleware<T> = (request: Request, response: Response) => T | Promise<T>;
|
|
/**
|
|
* Express request handler that sends back a response when a client is
|
|
* rate-limited.
|
|
*
|
|
* @param request {Request} - The Express request object
|
|
* @param response {Response} - The Express response object
|
|
* @param next {NextFunction} - The Express `next` function, can be called to skip responding
|
|
* @param optionsUsed {Options} - The options used to set up the middleware
|
|
*/
|
|
export declare type RateLimitExceededEventHandler = (request: Request, response: Response, next: NextFunction, optionsUsed: Options) => void;
|
|
/**
|
|
* Event callback that is triggered on a client's first request that exceeds the limit
|
|
* but not for subsequent requests. May be used for logging, etc. Should *not*
|
|
* send a response.
|
|
*
|
|
* @param request {Request} - The Express request object
|
|
* @param response {Response} - The Express response object
|
|
* @param optionsUsed {Options} - The options used to set up the middleware
|
|
*/
|
|
export declare type RateLimitReachedEventHandler = (request: Request, response: Response, optionsUsed: Options) => void;
|
|
/**
|
|
* Data returned from the `Store` when a client's hit counter is incremented.
|
|
*
|
|
* @property totalHits {number} - The number of hits for that client so far
|
|
* @property resetTime {Date | undefined} - The time when the counter resets
|
|
*/
|
|
export declare type IncrementResponse = {
|
|
totalHits: number;
|
|
resetTime: Date | undefined;
|
|
};
|
|
/**
|
|
* A modified Express request handler with the rate limit functions.
|
|
*/
|
|
export declare type RateLimitRequestHandler = RequestHandler & {
|
|
/**
|
|
* Method to reset a client's hit counter.
|
|
*
|
|
* @param key {string} - The identifier for a client
|
|
*/
|
|
resetKey: (key: string) => void;
|
|
};
|
|
/**
|
|
* An interface that all hit counter stores must implement.
|
|
*
|
|
* @deprecated 6.x - Implement the `Store` interface instead.
|
|
*/
|
|
export interface LegacyStore {
|
|
/**
|
|
* Method to increment a client's hit counter.
|
|
*
|
|
* @param key {string} - The identifier for a client
|
|
* @param callback {IncrementCallback} - The callback to call once the counter is incremented
|
|
*/
|
|
incr: (key: string, callback: IncrementCallback) => void;
|
|
/**
|
|
* Method to decrement a client's hit counter.
|
|
*
|
|
* @param key {string} - The identifier for a client
|
|
*/
|
|
decrement: (key: string) => void;
|
|
/**
|
|
* Method to reset a client's hit counter.
|
|
*
|
|
* @param key {string} - The identifier for a client
|
|
*/
|
|
resetKey: (key: string) => void;
|
|
/**
|
|
* Method to reset everyone's hit counter.
|
|
*/
|
|
resetAll?: () => void;
|
|
}
|
|
/**
|
|
* An interface that all hit counter stores must implement.
|
|
*/
|
|
export interface Store {
|
|
/**
|
|
* Method that initializes the store, and has access to the options passed to
|
|
* the middleware too.
|
|
*
|
|
* @param options {Options} - The options used to setup the middleware
|
|
*/
|
|
init?: (options: Options) => void;
|
|
/**
|
|
* Method to increment a client's hit counter.
|
|
*
|
|
* @param key {string} - The identifier for a client
|
|
*
|
|
* @returns {IncrementResponse} - The number of hits and reset time for that client
|
|
*/
|
|
increment: (key: string) => Promise<IncrementResponse> | IncrementResponse;
|
|
/**
|
|
* Method to decrement a client's hit counter.
|
|
*
|
|
* @param key {string} - The identifier for a client
|
|
*/
|
|
decrement: (key: string) => Promise<void> | void;
|
|
/**
|
|
* Method to reset a client's hit counter.
|
|
*
|
|
* @param key {string} - The identifier for a client
|
|
*/
|
|
resetKey: (key: string) => Promise<void> | void;
|
|
/**
|
|
* Method to reset everyone's hit counter.
|
|
*/
|
|
resetAll?: () => Promise<void> | void;
|
|
}
|
|
/**
|
|
* The configuration options for the rate limiter.
|
|
*/
|
|
export interface Options {
|
|
/**
|
|
* How long we should remember the requests.
|
|
*/
|
|
readonly windowMs: number;
|
|
/**
|
|
* The maximum number of connection to allow during the `window` before
|
|
* rate limiting the client.
|
|
*
|
|
* Can be the limit itself as a number or express middleware that parses
|
|
* the request and then figures out the limit.
|
|
*/
|
|
readonly max: number | ValueDeterminingMiddleware<number>;
|
|
/**
|
|
* The response body to send back when a client is rate limited.
|
|
*/
|
|
readonly message: any;
|
|
/**
|
|
* The HTTP status code to send back when a client is rate limited.
|
|
*
|
|
* Defaults to `HTTP 429 Too Many Requests` (RFC 6585).
|
|
*/
|
|
readonly statusCode: number;
|
|
/**
|
|
* Whether to send `X-RateLimit-*` headers with the rate limit and the number
|
|
* of requests.
|
|
*/
|
|
readonly legacyHeaders: boolean;
|
|
/**
|
|
* Whether to enable support for the rate limit standardization headers (`RateLimit-*`).
|
|
*/
|
|
readonly standardHeaders: boolean;
|
|
/**
|
|
* The name of the property on the request object to store the rate limit info.
|
|
*
|
|
* Defaults to `rateLimit`.
|
|
*/
|
|
readonly requestPropertyName: string;
|
|
/**
|
|
* If `true`, the library will (by default) skip all requests that have a 4XX
|
|
* or 5XX status.
|
|
*/
|
|
readonly skipFailedRequests: boolean;
|
|
/**
|
|
* If `true`, the library will (by default) skip all requests that have a
|
|
* status code less than 400.
|
|
*/
|
|
readonly skipSuccessfulRequests: boolean;
|
|
/**
|
|
* Method to determine whether or not the request counts as 'succesful'. Used
|
|
* when either `skipSuccessfulRequests` or `skipFailedRequests` is set to true.
|
|
*/
|
|
readonly requestWasSuccessful: ValueDeterminingMiddleware<boolean>;
|
|
/**
|
|
* Method to generate custom identifiers for clients.
|
|
*
|
|
* By default, the client's IP address is used.
|
|
*/
|
|
readonly keyGenerator: ValueDeterminingMiddleware<string>;
|
|
/**
|
|
* Method (in the form of middleware) to determine whether or not this request
|
|
* counts towards a client's quota.
|
|
*/
|
|
readonly skip: ValueDeterminingMiddleware<boolean>;
|
|
/**
|
|
* Express request handler that sends back a response when a client is
|
|
* rate-limited.
|
|
*/
|
|
readonly handler: RateLimitExceededEventHandler;
|
|
/**
|
|
* Express request handler that sends back a response when a client has
|
|
* reached their rate limit, and will be rate limited on their next request.
|
|
*/
|
|
readonly onLimitReached: RateLimitReachedEventHandler;
|
|
/**
|
|
* The {@link Store} to use to store the hit count for each client.
|
|
*/
|
|
store: Store;
|
|
/**
|
|
* Whether to send `X-RateLimit-*` headers with the rate limit and the number
|
|
* of requests.
|
|
*
|
|
* @deprecated 6.x - This option was renamed to `legacyHeaders`.
|
|
*/
|
|
headers?: boolean;
|
|
/**
|
|
* Whether to send `RateLimit-*` headers with the rate limit and the number
|
|
* of requests.
|
|
*
|
|
* @deprecated 6.x - This option was renamed to `standardHeaders`.
|
|
*/
|
|
draft_polli_ratelimit_headers?: boolean;
|
|
}
|
|
/**
|
|
* The extended request object that includes information about the client's
|
|
* rate limit.
|
|
*/
|
|
export declare type AugmentedRequest = Request & {
|
|
[key: string]: RateLimitInfo;
|
|
};
|
|
/**
|
|
* The rate limit related information for each client included in the
|
|
* Express request object.
|
|
*/
|
|
export interface RateLimitInfo {
|
|
readonly limit: number;
|
|
readonly current: number;
|
|
readonly remaining: number;
|
|
readonly resetTime: Date | undefined;
|
|
}
|
|
declare const rateLimit: (passedOptions?: (Omit<Partial<Options>, "store"> & {
|
|
store?: LegacyStore | Store | undefined;
|
|
}) | undefined) => RateLimitRequestHandler;
|
|
export default rateLimit;
|
|
|
|
export {};
|