2025-03-23 21:00:08 +01:00

188 lines
5.8 KiB
TypeScript

import { ReadonlyContext } from './context';
export interface Request {
[k: string]: any;
body?: any;
cookies?: Record<string, any>;
headers?: Record<string, any>;
params?: Record<string, any>;
query?: Record<string, any>;
}
export type Middleware = (req: Request, res: any, next: (err?: any) => void) => void;
export type Location = 'body' | 'cookies' | 'headers' | 'params' | 'query';
/**
* Metadata about a validated field.
*/
export type Meta = {
/**
* The express request from which the field was validated
*/
req: Request;
/**
* Which of the request objects the field was picked from
*/
location: Location;
/**
* The full path of the field within the request object.
*
* @example
* const meta = { req, location: 'body', path: 'foo.bar' }; // req.body.foo.bar
*/
path: string;
/**
* Values from wildcards/globstars used when selecting fields for validation.
*
* @example
* body('products.*.price').custom((value, { req, pathValues }) => {
* const index = pathValues[0];
* const productName = req.body.products[index].name;
* });
*/
pathValues: readonly (string | string[])[];
};
/**
* A function which may
* - return falsy values, a promise that rejects or throw to indicate that a field is invalid;
* - return truthy values or a promise that resolves to indicate that a field is valid.
*
* @param input the field value
* @param meta metadata about the field being validated
*/
export type CustomValidator = (input: any, meta: Meta) => any;
export type StandardValidator = (input: string, ...options: any[]) => boolean;
export type CustomSanitizer = (input: any, meta: Meta) => any;
export type StandardSanitizer = (input: string, ...options: any[]) => any;
export interface FieldInstance {
path: string;
originalPath: string;
pathValues: readonly (string | string[])[];
location: Location;
value: any;
}
export type UnknownFieldInstance = Omit<FieldInstance, 'originalPath' | 'pathValues'>;
export type FieldValidationError = {
/**
* Indicates that the error occurred because a field had an invalid value
*/
type: 'field';
/**
* The location within the request where this field is
*/
location: Location;
/**
* The path to the field which has a validation error
*/
path: string;
/**
* The value of the field. It might be unset if the value is hidden.
*/
value?: any;
/**
* The error message
*/
msg: any;
};
export type UnknownFieldsError = {
/**
* Indicates that the error occurred because one or more fields are unknown in the request
*/
type: 'unknown_fields';
/**
* The error message
*/
msg: any;
/**
* The list of fields that are unknown
*/
fields: UnknownFieldInstance[];
};
export type AlternativeValidationError = {
/**
* Indicates that the error occurred because all alternatives (e.g. in `oneOf()`) were invalid
*/
type: 'alternative';
/**
* The error message
*/
msg: any;
/**
* The list of underlying validation errors returned by validation chains in `oneOf()`
*/
nestedErrors: FieldValidationError[];
};
export type GroupedAlternativeValidationError = {
/**
* Indicates that the error occurred because all alternatives (e.g. in `oneOf()`) were invalid,
* and the nested errors are grouped per alternative.
*/
type: 'alternative_grouped';
/**
* The error message
*/
msg: any;
/**
* The list of underlying validation errors returned by validation chains in `oneOf()`
*/
nestedErrors: FieldValidationError[][];
};
/**
* A validation error as reported by a middleware.
* The properties available in the error object vary according to the type.
*
* @example
* if (error.type === 'alternative') {
* console.log(`There are ${error.nestedErrors.length} errors under this alternative list`);
* } else if (error.type === 'field') {
* console.log(`There's an error with field ${error.path} in the request ${error.location}`);
* }
*
*/
export type ValidationError = AlternativeValidationError | GroupedAlternativeValidationError | UnknownFieldsError | FieldValidationError;
/**
* An error message that's not a function, as these are treated as message factories
* by all validation middlewares.
*/
export type ErrorMessage = string | number | symbol | boolean | object | any[];
/**
* A function which creates an error message based on a field's value.
*
* @param input the field value
* @param meta metadata about the field that was validated
*/
export type FieldMessageFactory = (value: any, meta: Meta) => any;
/**
* A function which creates an error message based on an alternative's nested errors.
*
* @see `oneOf()`
* @param nestedErrors The errors from the invalid alternative(s).
* @param opts
*/
export type AlternativeMessageFactory = (nestedErrors: FieldValidationError[], opts: {
req: Request;
}) => any;
/**
* A function which creates an error message based on a group of alternatives nested errors.
*
* @see `oneOf()`
* @param nestedErrors The errors from the invalid alternative groups.
* @param opts
*/
export type GroupedAlternativeMessageFactory = (nestedErrors: FieldValidationError[][], opts: {
req: Request;
}) => any;
/**
* A function which creates an error message based on unknown fields.
*
* @see `checkExact()`
* @param unknownFields The unknown fields found in the request
* @param opts
*/
export type UnknownFieldMessageFactory = (unknownFields: UnknownFieldInstance[], opts: {
req: Request;
}) => any;
export declare const contextsKey = "express-validator#contexts";
export interface InternalRequest extends Request {
[contextsKey]?: ReadonlyContext[];
}
export declare class ValidationHalt extends Error {
}