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index.d.ts
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index.d.ts
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import { Server } from 'http';
import { ListenOptions } from 'net';
import * as Stream from 'stream';
import { DefaultState, DefaultContext, ParameterizedContext, Middleware as KoaMiddleware } from 'koa';
declare namespace cottage {
/**
* Cottage is alias of {@link cottage.Application}.
*/
class Cottage extends Application {}
class Application extends Router {
/**
* Start server and listen to given port.
*
* Shorthand for:
* Koa().use(app.callback()).listen(...)
*
* @see {@link https://nodejs.org/api/net.html#net_server_listen net.Server#listen()}
*/
listen(port?: number, hostname?: string, backlog?: number, listener?: () => void): Server;
listen(port: number, hostname?: string, listener?: () => void): Server;
listen(port: number, backlog?: number, listener?: () => void): Server;
listen(port: number, listener?: () => void): Server;
listen(path: string, backlog?: number, listener?: () => void): Server;
listen(path: string, listener?: () => void): Server;
listen(options: ListenOptions, listener?: () => void): Server;
listen(handle: any, backlog?: number, listener?: () => void): Server;
listen(handle: any, listener?: () => void): Server;
}
class Router {
/**
* Creates a router with options.
*/
constructor(options?: RouterOptions);
/**
* Handles all request and routes into the correct path.
* This method is Koa.js style middleware - meaning you can directly
* attach Cottage app to Koa app as middleware.
*
* Example:
* koaApp.use(cottage.callback()).listen(8080)
*/
callback(): KoaMiddleware;
/**
* Returns an instance of a single route which you can then use to handle HTTP verbs.
* Use router.route() to avoid duplicate route naming and thus typo errors.
*/
route(path: string): Route;
/**
* Sets not found handler.
* Called when nothing is matched from the incoming request.
*
* NOTE THAT you should always call `await next()` at last in handler to
* continue executing the middleware chain.
* If you don't, the not found handler will not be executed.
*/
setNotFoundHandler(handler: KoaCompatibleMiddleware);
/**
* Mounts the middleware function(s) at the path.
* Middleware function will be executed every time the router receives the request.
* If path is specified, it will be executed for the request on the given path.
*
* NOTE THAT middleware function MUST BE Koa.js middleware.
* DO) app.use(async (ctx, next) => { ... })
* DON'T) app.use(async (req, res, next) => { ... })
*
* ALSO NOTE THAT due to the koa.js middleware compatibility,
* the context.path value will be 'stripped' - means that
* given path prefix will be removed temporarily only for this middleware.
*
* It does the same thing that koa-mount does. Because of this,
* you can use some koa.js middlewares (ex: koa-serve) without using koa-mount.
*/
use(...middlewares: Handler[]);
use(path: string, ...middlewares: Handler[]);
/**
* Handles all methods with a given path.
* If no path is given, it behaves almost like `router.use` with only one difference:
*
* `router.use()` will execute notFoundHandler if nothing is matched,
* however `router.all()` will always match the handler, thus not calling notFoundHandler.
*/
all(...handlers: Handler[]);
all(path: string, ...handlers: Handler[]);
/**
* Handles HTTP GET method.
*/
get(path: string, ...handlers: Handler[]);
/**
* Handles HTTP POST method.
*/
post(path: string, ...handlers: Handler[]);
/**
* Handles HTTP PUT method.
*/
put(path: string, ...handlers: Handler[]);
/**
* Handles HTTP LINK method.
*/
link(path: string, ...handlers: Handler[]);
/**
* Handles HTTP UNLINK method.
*/
unlink(path: string, ...handlers: Handler[]);
/**
* Handles HTTP DELETE method.
*/
delete(path: string, ...handlers: Handler[]);
/**
* Alias for Router#delete() because it's a reserved word.
*/
del(path: string, ...handlers: Handler[]);
/**
* Handles HTTP HEAD method.
*/
head(path: string, ...handlers: Handler[]);
/**
* Handles HTTP OPTIONS method.
*/
options(path: string, ...handlers: Handler[]);
/**
* Handles HTTP PATCH method.
*/
patch(path: string, ...handlers: Handler[]);
}
class Route {
/**
* Mounts the middleware function(s) at the path.
* Middleware function will be executed every time the router receives the request.
* If path is specified, it will be executed for the request on the given path.
*
* NOTE THAT middleware function MUST BE Koa.js middleware.
* DO) app.use(async (ctx, next) => { ... })
* DON'T) app.use(async (req, res, next) => { ... })
*
* ALSO NOTE THAT due to the koa.js middleware compatibility,
* the context.path value will be 'stripped' - means that
* given path prefix will be removed temporarily only for this middleware.
*
* It does the same thing that koa-mount does. Because of this,
* you can use some koa.js middlewares (ex: koa-serve) without using koa-mount.
*/
use(...middlewares: Handler[]);
use(path: string, ...middlewares: Handler[]);
/**
* NOTE: Different from express, This method is same as 'use' method in Cottage!
* (because cottage doesn't have an router stack)
*/
all(...handlers: Handler[]);
all(path: string, ...handlers: Handler[]);
/**
* Handles HTTP GET method.
* @returns {Route} this
*/
get(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP POST method.
* @returns {Route} this
*/
post(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP PUT method.
* @returns {Route} this
*/
put(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP LINK method.
* @returns {Route} this
*/
link(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP UNLINK method.
* @returns {Route} this
*/
unlink(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP DELETE method.
* @returns {Route} this
*/
delete(path: string, ...handlers: Handler[]): Route;
/**
* Alias for Router#delete() because it's a reserved word.
* @returns {Route} this
*/
del(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP HEAD method.
* @returns {Route} this
*/
head(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP OPTIONS method.
* @returns {Route} this
*/
options(path: string, ...handlers: Handler[]): Route;
/**
* Handles HTTP PATCH method.
* @returns {Route} this
*/
patch(path: string, ...handlers: Handler[]): Route;
}
class Response {
status: number;
body: ResponseBody;
/**
* Creates a {@link cottage.Response} instance,
* which can be returned in a cottage middleware.
*/
constructor(status: number, body?: ResponseBody);
/**
* Predefine a response globally with given name.
* The defined response can be loaded through `Response.from(name)`.
*/
static define(name: string, status: number, body: ResponseBody);
/**
* Loads predefined status registered with given name.
*/
static from(name: string): Response;
}
type RouterOptions = {
caseSensitive: boolean;
strict: boolean;
}
type Context<
StateT = DefaultState,
CustomT = DefaultContext,
> = ParameterizedContext<StateT, CustomT>;
/**
* Cottage middleware is almost same with {@link KoaMiddleware},
* except it allows returning a response body or {@link cottage.Response} instance.
*/
type Middleware<
StateT,
CustomT,
> = (ctx: Context<StateT, CustomT>, next: () => Promise<any>) => ResponseBody | Response;
/**
* Possible response bodies can be returned from cottage.
*/
type ResponseBody =
string | Buffer // written
| Stream // piped
| Object | Array<any> // json-stringified (with Content-Type: application/json)
| null; // no content response
/**
* Cottage accepts both cottage-style middleware and koa-style middleware.
*/
type KoaCompatibleMiddleware<StateT = DefaultState, CustomT = DefaultState> =
Middleware<StateT, CustomT> | KoaMiddleware<StateT, CustomT>;
type Handler<StateT = DefaultState, CustomT = DefaultContext> =
Router | KoaCompatibleMiddleware<StateT, CustomT>;
}
export = cottage;