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2.2.0 / 2025-03-26
==================
* Remove `setImmediate` support check
* Restore `debug` dependency
2.1.0 / 2025-02-10
==================
* Updated `engines` field to Node@18 or higher
* Remove `Object.setPrototypeOf` polyfill
* Use `Array.flat` instead of `array-flatten` package
* Replace `methods` dependency with standard library
* deps: parseurl@^1.3.3
* deps: is-promise@^4.0.0
* Replace `utils-merge` dependency with `Object.assign`
* deps: Remove unused dep `after`
2.0.0 / 2024-09-09
==================
* Drop support for node <18
* deps: path-to-regexp@^8.0.0
- Drop support for partial capture group `router.route('/user(s?)/:user/:op')` but still have optional non-capture `/user{s}/:user/:op`
- `:name?` becomes `{:name}`
- `:name*` becomes `*name`.
- The splat change also changes splat from strings to an array of strings
- Optional splats become `{*name}`
- `:name+` becomes `*name` and thus equivalent to `*name` so I dropped those tests
- Strings as regular expressions are fully removed, need to be converted to native regular expressions
2.0.0-beta.2 / 2024-03-20
=========================
This incorporates all changes after 1.3.5 up to 1.3.8.
* Add support for returned, rejected Promises to `router.param`
2.0.0-beta.1 / 2020-03-29
=========================
This incorporates all changes after 1.3.3 up to 1.3.5.
* Internalize private `router.process_params` method
* Remove `debug` dependency
* deps: array-flatten@3.0.0
* deps: parseurl@~1.3.3
* deps: path-to-regexp@3.2.0
- Add new `?`, `*`, and `+` parameter modifiers.
- Matching group expressions are only RegExp syntax.
`(*)` is no longer valid and must be written as `(.*)`, for example.
- Named matching groups no longer available by position in `req.params`.
`/:foo(.*)` only captures as `req.params.foo` and not available as
`req.params[0]`.
- Regular expressions can only be used in a matching group.
`/\\d+` is no longer valid and must be written as `/(\\d+)`.
- Matching groups are now literal regular expressions.
`:foo` named captures can no longer be included inside a capture group.
- Special `*` path segment behavior removed.
`/foo/*/bar` will match a literal `*` as the middle segment.
* deps: setprototypeof@1.2.0
2.0.0-alpha.1 / 2018-07-27
==========================
* Add basic support for returned, rejected Promises
- Rejected Promises from middleware functions `next(error)`
* Drop support for Node.js below 0.10
* deps: debug@3.1.0
- Add `DEBUG_HIDE_DATE` environment variable
- Change timer to per-namespace instead of global
- Change non-TTY date format
- Remove `DEBUG_FD` environment variable support
- Support 256 namespace colors
1.3.8 / 2023-02-24
==================
* Fix routing requests without method
1.3.7 / 2022-04-28
==================
* Fix hanging on large stack of sync routes
1.3.6 / 2021-11-15
==================
* Fix handling very large stacks of sync middleware
* deps: safe-buffer@5.2.1
1.3.5 / 2020-03-24
==================
* Fix incorrect middleware execution with unanchored `RegExp`s
* perf: use plain object for internal method map
1.3.4 / 2020-01-24
==================
* deps: array-flatten@3.0.0
* deps: parseurl@~1.3.3
* deps: setprototypeof@1.2.0
1.3.3 / 2018-07-06
==================
* Fix JSDoc for `Router` constructor
1.3.2 / 2017-09-24
==================
* deps: debug@2.6.9
* deps: parseurl@~1.3.2
- perf: reduce overhead for full URLs
- perf: unroll the "fast-path" `RegExp`
* deps: setprototypeof@1.1.0
* deps: utils-merge@1.0.1
1.3.1 / 2017-05-19
==================
* deps: debug@2.6.8
- Fix `DEBUG_MAX_ARRAY_LENGTH`
- deps: ms@2.0.0
1.3.0 / 2017-02-25
==================
* Add `next("router")` to exit from router
* Fix case where `router.use` skipped requests routes did not
* Use `%o` in path debug to tell types apart
* deps: setprototypeof@1.0.3
* perf: add fast match path for `*` route
1.2.0 / 2017-02-17
==================
* Skip routing when `req.url` is not set
* deps: debug@2.6.1
- Allow colors in workers
- Deprecated `DEBUG_FD` environment variable set to `3` or higher
- Fix error when running under React Native
- Use same color for same namespace
- deps: ms@0.7.2
1.1.5 / 2017-01-28
==================
* deps: array-flatten@2.1.1
* deps: setprototypeof@1.0.2
- Fix using fallback even when native method exists
1.1.4 / 2016-01-21
==================
* deps: array-flatten@2.0.0
* deps: methods@~1.1.2
- perf: enable strict mode
* deps: parseurl@~1.3.1
- perf: enable strict mode
1.1.3 / 2015-08-02
==================
* Fix infinite loop condition using `mergeParams: true`
* Fix inner numeric indices incorrectly altering parent `req.params`
* deps: array-flatten@1.1.1
- perf: enable strict mode
* deps: path-to-regexp@0.1.7
- Fix regression with escaped round brackets and matching groups
1.1.2 / 2015-07-06
==================
* Fix hiding platform issues with `decodeURIComponent`
- Only `URIError`s are a 400
* Fix using `*` before params in routes
* Fix using capture groups before params in routes
* deps: path-to-regexp@0.1.6
* perf: enable strict mode
* perf: remove argument reassignments in routing
* perf: skip attempting to decode zero length string
* perf: use plain for loops
1.1.1 / 2015-05-25
==================
* Fix issue where `next('route')` in `router.param` would incorrectly skip values
* deps: array-flatten@1.1.0
* deps: debug@~2.2.0
- deps: ms@0.7.1
1.1.0 / 2015-04-22
==================
* Use `setprototypeof` instead of `__proto__`
* deps: debug@~2.1.3
- Fix high intensity foreground color for bold
- deps: ms@0.7.0
1.0.0 / 2015-01-13
==================
* Fix crash from error within `OPTIONS` response handler
* deps: array-flatten@1.0.2
- Remove redundant code path
1.0.0-beta.3 / 2015-01-11
=========================
* Fix duplicate methods appearing in OPTIONS responses
* Fix OPTIONS responses to include the HEAD method properly
* Remove support for leading colon in `router.param(name, fn)`
* Use `array-flatten` for flattening arrays
* deps: debug@~2.1.1
* deps: methods@~1.1.1
1.0.0-beta.2 / 2014-11-19
=========================
* Match routes iteratively to prevent stack overflows
1.0.0-beta.1 / 2014-11-16
=========================
* Initial release ported from Express 4.x
- Altered to work without Express

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(The MIT License)
Copyright (c) 2013 Roman Shtylman
Copyright (c) 2014-2022 Douglas Christopher Wilson
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# router
[![NPM Version][npm-image]][npm-url]
[![NPM Downloads][downloads-image]][downloads-url]
[![Node.js Version][node-version-image]][node-version-url]
[![Build Status][ci-image]][ci-url]
[![Test Coverage][coveralls-image]][coveralls-url]
Simple middleware-style router
## Installation
This is a [Node.js](https://nodejs.org/en/) module available through the
[npm registry](https://www.npmjs.com/). Installation is done using the
[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
```bash
$ npm install router
```
## API
```js
var finalhandler = require('finalhandler')
var http = require('http')
var Router = require('router')
var router = Router()
router.get('/', function (req, res) {
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
res.end('Hello World!')
})
var server = http.createServer(function (req, res) {
router(req, res, finalhandler(req, res))
})
server.listen(3000)
```
This module is currently an extracted version from the Express project,
but with the main change being it can be used with a plain `http.createServer`
object or other web frameworks by removing Express-specific API calls.
## Router(options)
Options
- `strict` - When `false` trailing slashes are optional (default: `false`)
- `caseSensitive` - When `true` the routing will be case sensitive. (default: `false`)
- `mergeParams` - When `true` any `req.params` passed to the router will be
merged into the router's `req.params`. (default: `false`) ([example](#example-using-mergeparams))
Returns a function with the signature `router(req, res, callback)` where
`callback([err])` must be provided to handle errors and fall-through from
not handling requests.
### router.use([path], ...middleware)
Use the given [middleware function](#middleware) for all http methods on the
given `path`, defaulting to the root path.
`router` does not automatically see `use` as a handler. As such, it will not
consider it one for handling `OPTIONS` requests.
* Note: If a `path` is specified, that `path` is stripped from the start of
`req.url`.
<!-- eslint-disable no-undef -->
```js
router.use(function (req, res, next) {
// do your things
// continue to the next middleware
// the request will stall if this is not called
next()
// note: you should NOT call `next` if you have begun writing to the response
})
```
[Middleware](#middleware) can themselves use `next('router')` at any time to
exit the current router instance completely, invoking the top-level callback.
### router\[method](path, ...[middleware], handler)
The [http methods](https://github.com/jshttp/methods/blob/master/index.js) provide
the routing functionality in `router`.
Method middleware and handlers follow usual [middleware](#middleware) behavior,
except they will only be called when the method and path match the request.
<!-- eslint-disable no-undef -->
```js
// handle a `GET` request
router.get('/', function (req, res) {
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
res.end('Hello World!')
})
```
[Middleware](#middleware) given before the handler have one additional trick,
they may invoke `next('route')`. Calling `next('route')` bypasses the remaining
middleware and the handler mounted for this route, passing the request to the
next route suitable for handling this request.
Route handlers and middleware can themselves use `next('router')` at any time
to exit the current router instance completely, invoking the top-level callback.
### router.param(name, param_middleware)
Maps the specified path parameter `name` to a specialized param-capturing middleware.
This function positions the middleware in the same stack as `.use`.
The function can optionally return a `Promise` object. If a `Promise` object
is returned from the function, the router will attach an `onRejected` callback
using `.then`. If the promise is rejected, `next` will be called with the
rejected value, or an error if the value is falsy.
Parameter mapping is used to provide pre-conditions to routes
which use normalized placeholders. For example a _:user_id_ parameter
could automatically load a user's information from the database without
any additional code:
<!-- eslint-disable no-undef -->
```js
router.param('user_id', function (req, res, next, id) {
User.find(id, function (err, user) {
if (err) {
return next(err)
} else if (!user) {
return next(new Error('failed to load user'))
}
req.user = user
// continue processing the request
next()
})
})
```
### router.route(path)
Creates an instance of a single `Route` for the given `path`.
(See `Router.Route` below)
Routes can be used to handle http `methods` with their own, optional middleware.
Using `router.route(path)` is a recommended approach to avoiding duplicate
route naming and thus typo errors.
<!-- eslint-disable no-undef, no-unused-vars -->
```js
var api = router.route('/api/')
```
## Router.Route(path)
Represents a single route as an instance that can be used to handle http
`methods` with it's own, optional middleware.
### route\[method](handler)
These are functions which you can directly call on a route to register a new
`handler` for the `method` on the route.
<!-- eslint-disable no-undef -->
```js
// handle a `GET` request
var status = router.route('/status')
status.get(function (req, res) {
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
res.end('All Systems Green!')
})
```
### route.all(handler)
Adds a handler for all HTTP methods to this route.
The handler can behave like middleware and call `next` to continue processing
rather than responding.
<!-- eslint-disable no-undef -->
```js
router.route('/')
.all(function (req, res, next) {
next()
})
.all(checkSomething)
.get(function (req, res) {
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
res.end('Hello World!')
})
```
## Middleware
Middleware (and method handlers) are functions that follow specific function
parameters and have defined behavior when used with `router`. The most common
format is with three parameters - "req", "res" and "next".
- `req` - This is a [HTTP incoming message](https://nodejs.org/api/http.html#http_http_incomingmessage) instance.
- `res` - This is a [HTTP server response](https://nodejs.org/api/http.html#http_class_http_serverresponse) instance.
- `next` - Calling this function that tells `router` to proceed to the next matching middleware or method handler. It accepts an error as the first argument.
The function can optionally return a `Promise` object. If a `Promise` object
is returned from the function, the router will attach an `onRejected` callback
using `.then`. If the promise is rejected, `next` will be called with the
rejected value, or an error if the value is falsy.
Middleware and method handlers can also be defined with four arguments. When
the function has four parameters defined, the first argument is an error and
subsequent arguments remain, becoming - "err", "req", "res", "next". These
functions are "error handling middleware", and can be used for handling
errors that occurred in previous handlers (E.g. from calling `next(err)`).
This is most used when you want to define arbitrary rendering of errors.
<!-- eslint-disable no-undef -->
```js
router.get('/error_route', function (req, res, next) {
return next(new Error('Bad Request'))
})
router.use(function (err, req, res, next) {
res.end(err.message) //= > "Bad Request"
})
```
Error handling middleware will **only** be invoked when an error was given. As
long as the error is in the pipeline, normal middleware and handlers will be
bypassed - only error handling middleware will be invoked with an error.
## Examples
```js
// import our modules
var http = require('http')
var Router = require('router')
var finalhandler = require('finalhandler')
var compression = require('compression')
var bodyParser = require('body-parser')
// store our message to display
var message = 'Hello World!'
// initialize the router & server and add a final callback.
var router = Router()
var server = http.createServer(function onRequest (req, res) {
router(req, res, finalhandler(req, res))
})
// use some middleware and compress all outgoing responses
router.use(compression())
// handle `GET` requests to `/message`
router.get('/message', function (req, res) {
res.statusCode = 200
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
res.end(message + '\n')
})
// create and mount a new router for our API
var api = Router()
router.use('/api/', api)
// add a body parsing middleware to our API
api.use(bodyParser.json())
// handle `PATCH` requests to `/api/set-message`
api.patch('/set-message', function (req, res) {
if (req.body.value) {
message = req.body.value
res.statusCode = 200
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
res.end(message + '\n')
} else {
res.statusCode = 400
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
res.end('Invalid API Syntax\n')
}
})
// make our http server listen to connections
server.listen(8080)
```
You can get the message by running this command in your terminal,
or navigating to `127.0.0.1:8080` in a web browser.
```bash
curl http://127.0.0.1:8080
```
You can set the message by sending it a `PATCH` request via this command:
```bash
curl http://127.0.0.1:8080/api/set-message -X PATCH -H "Content-Type: application/json" -d '{"value":"Cats!"}'
```
### Example using mergeParams
```js
var http = require('http')
var Router = require('router')
var finalhandler = require('finalhandler')
// this example is about the mergeParams option
var opts = { mergeParams: true }
// make a router with out special options
var router = Router(opts)
var server = http.createServer(function onRequest (req, res) {
// set something to be passed into the router
req.params = { type: 'kitten' }
router(req, res, finalhandler(req, res))
})
router.get('/', function (req, res) {
res.statusCode = 200
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
// with respond with the the params that were passed in
res.end(req.params.type + '\n')
})
// make another router with our options
var handler = Router(opts)
// mount our new router to a route that accepts a param
router.use('/:path', handler)
handler.get('/', function (req, res) {
res.statusCode = 200
res.setHeader('Content-Type', 'text/plain; charset=utf-8')
// will respond with the param of the router's parent route
res.end(req.params.path + '\n')
})
// make our http server listen to connections
server.listen(8080)
```
Now you can get the type, or what path you are requesting:
```bash
curl http://127.0.0.1:8080
> kitten
curl http://127.0.0.1:8080/such_path
> such_path
```
### Example of advanced `.route()` usage
This example shows how to implement routes where there is a custom
handler to execute when the path matched, but no methods matched.
Without any special handling, this would be treated as just a
generic non-match by `router` (which typically results in a 404),
but with a custom handler, a `405 Method Not Allowed` can be sent.
```js
var http = require('http')
var finalhandler = require('finalhandler')
var Router = require('router')
// create the router and server
var router = new Router()
var server = http.createServer(function onRequest (req, res) {
router(req, res, finalhandler(req, res))
})
// register a route and add all methods
router.route('/pet/:id')
.get(function (req, res) {
// this is GET /pet/:id
res.setHeader('Content-Type', 'application/json')
res.end(JSON.stringify({ name: 'tobi' }))
})
.delete(function (req, res) {
// this is DELETE /pet/:id
res.end()
})
.all(function (req, res) {
// this is called for all other methods not
// defined above for /pet/:id
res.statusCode = 405
res.end()
})
// make our http server listen to connections
server.listen(8080)
```
## License
[MIT](LICENSE)
[ci-image]: https://badgen.net/github/checks/pillarjs/router/master?label=ci
[ci-url]: https://github.com/pillarjs/router/actions/workflows/ci.yml
[npm-image]: https://img.shields.io/npm/v/router.svg
[npm-url]: https://npmjs.org/package/router
[node-version-image]: https://img.shields.io/node/v/router.svg
[node-version-url]: http://nodejs.org/download/
[coveralls-image]: https://img.shields.io/coveralls/pillarjs/router/master.svg
[coveralls-url]: https://coveralls.io/r/pillarjs/router?branch=master
[downloads-image]: https://img.shields.io/npm/dm/router.svg
[downloads-url]: https://npmjs.org/package/router

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/*!
* router
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2022 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module dependencies.
* @private
*/
const isPromise = require('is-promise')
const Layer = require('./lib/layer')
const { METHODS } = require('node:http')
const parseUrl = require('parseurl')
const Route = require('./lib/route')
const debug = require('debug')('router')
const deprecate = require('depd')('router')
/**
* Module variables.
* @private
*/
const slice = Array.prototype.slice
const flatten = Array.prototype.flat
const methods = METHODS.map((method) => method.toLowerCase())
/**
* Expose `Router`.
*/
module.exports = Router
/**
* Expose `Route`.
*/
module.exports.Route = Route
/**
* Initialize a new `Router` with the given `options`.
*
* @param {object} [options]
* @return {Router} which is a callable function
* @public
*/
function Router (options) {
if (!(this instanceof Router)) {
return new Router(options)
}
const opts = options || {}
function router (req, res, next) {
router.handle(req, res, next)
}
// inherit from the correct prototype
Object.setPrototypeOf(router, this)
router.caseSensitive = opts.caseSensitive
router.mergeParams = opts.mergeParams
router.params = {}
router.strict = opts.strict
router.stack = []
return router
}
/**
* Router prototype inherits from a Function.
*/
/* istanbul ignore next */
Router.prototype = function () {}
/**
* Map the given param placeholder `name`(s) to the given callback.
*
* Parameter mapping is used to provide pre-conditions to routes
* which use normalized placeholders. For example a _:user_id_ parameter
* could automatically load a user's information from the database without
* any additional code.
*
* The callback uses the same signature as middleware, the only difference
* being that the value of the placeholder is passed, in this case the _id_
* of the user. Once the `next()` function is invoked, just like middleware
* it will continue on to execute the route, or subsequent parameter functions.
*
* Just like in middleware, you must either respond to the request or call next
* to avoid stalling the request.
*
* router.param('user_id', function(req, res, next, id){
* User.find(id, function(err, user){
* if (err) {
* return next(err)
* } else if (!user) {
* return next(new Error('failed to load user'))
* }
* req.user = user
* next()
* })
* })
*
* @param {string} name
* @param {function} fn
* @public
*/
Router.prototype.param = function param (name, fn) {
if (!name) {
throw new TypeError('argument name is required')
}
if (typeof name !== 'string') {
throw new TypeError('argument name must be a string')
}
if (!fn) {
throw new TypeError('argument fn is required')
}
if (typeof fn !== 'function') {
throw new TypeError('argument fn must be a function')
}
let params = this.params[name]
if (!params) {
params = this.params[name] = []
}
params.push(fn)
return this
}
/**
* Dispatch a req, res into the router.
*
* @private
*/
Router.prototype.handle = function handle (req, res, callback) {
if (!callback) {
throw new TypeError('argument callback is required')
}
debug('dispatching %s %s', req.method, req.url)
let idx = 0
let methods
const protohost = getProtohost(req.url) || ''
let removed = ''
const self = this
let slashAdded = false
let sync = 0
const paramcalled = {}
// middleware and routes
const stack = this.stack
// manage inter-router variables
const parentParams = req.params
const parentUrl = req.baseUrl || ''
let done = restore(callback, req, 'baseUrl', 'next', 'params')
// setup next layer
req.next = next
// for options requests, respond with a default if nothing else responds
if (req.method === 'OPTIONS') {
methods = []
done = wrap(done, generateOptionsResponder(res, methods))
}
// setup basic req values
req.baseUrl = parentUrl
req.originalUrl = req.originalUrl || req.url
next()
function next (err) {
let layerError = err === 'route'
? null
: err
// remove added slash
if (slashAdded) {
req.url = req.url.slice(1)
slashAdded = false
}
// restore altered req.url
if (removed.length !== 0) {
req.baseUrl = parentUrl
req.url = protohost + removed + req.url.slice(protohost.length)
removed = ''
}
// signal to exit router
if (layerError === 'router') {
setImmediate(done, null)
return
}
// no more matching layers
if (idx >= stack.length) {
setImmediate(done, layerError)
return
}
// max sync stack
if (++sync > 100) {
return setImmediate(next, err)
}
// get pathname of request
const path = getPathname(req)
if (path == null) {
return done(layerError)
}
// find next matching layer
let layer
let match
let route
while (match !== true && idx < stack.length) {
layer = stack[idx++]
match = matchLayer(layer, path)
route = layer.route
if (typeof match !== 'boolean') {
// hold on to layerError
layerError = layerError || match
}
if (match !== true) {
continue
}
if (!route) {
// process non-route handlers normally
continue
}
if (layerError) {
// routes do not match with a pending error
match = false
continue
}
const method = req.method
const hasMethod = route._handlesMethod(method)
// build up automatic options response
if (!hasMethod && method === 'OPTIONS' && methods) {
methods.push.apply(methods, route._methods())
}
// don't even bother matching route
if (!hasMethod && method !== 'HEAD') {
match = false
}
}
// no match
if (match !== true) {
return done(layerError)
}
// store route for dispatch on change
if (route) {
req.route = route
}
// Capture one-time layer values
req.params = self.mergeParams
? mergeParams(layer.params, parentParams)
: layer.params
const layerPath = layer.path
// this should be done for the layer
processParams(self.params, layer, paramcalled, req, res, function (err) {
if (err) {
next(layerError || err)
} else if (route) {
layer.handleRequest(req, res, next)
} else {
trimPrefix(layer, layerError, layerPath, path)
}
sync = 0
})
}
function trimPrefix (layer, layerError, layerPath, path) {
if (layerPath.length !== 0) {
// Validate path is a prefix match
if (layerPath !== path.substring(0, layerPath.length)) {
next(layerError)
return
}
// Validate path breaks on a path separator
const c = path[layerPath.length]
if (c && c !== '/') {
next(layerError)
return
}
// Trim off the part of the url that matches the route
// middleware (.use stuff) needs to have the path stripped
debug('trim prefix (%s) from url %s', layerPath, req.url)
removed = layerPath
req.url = protohost + req.url.slice(protohost.length + removed.length)
// Ensure leading slash
if (!protohost && req.url[0] !== '/') {
req.url = '/' + req.url
slashAdded = true
}
// Setup base URL (no trailing slash)
req.baseUrl = parentUrl + (removed[removed.length - 1] === '/'
? removed.substring(0, removed.length - 1)
: removed)
}
debug('%s %s : %s', layer.name, layerPath, req.originalUrl)
if (layerError) {
layer.handleError(layerError, req, res, next)
} else {
layer.handleRequest(req, res, next)
}
}
}
/**
* Use the given middleware function, with optional path, defaulting to "/".
*
* Use (like `.all`) will run for any http METHOD, but it will not add
* handlers for those methods so OPTIONS requests will not consider `.use`
* functions even if they could respond.
*
* The other difference is that _route_ path is stripped and not visible
* to the handler function. The main effect of this feature is that mounted
* handlers can operate without any code changes regardless of the "prefix"
* pathname.
*
* @public
*/
Router.prototype.use = function use (handler) {
let offset = 0
let path = '/'
// default path to '/'
// disambiguate router.use([handler])
if (typeof handler !== 'function') {
let arg = handler
while (Array.isArray(arg) && arg.length !== 0) {
arg = arg[0]
}
// first arg is the path
if (typeof arg !== 'function') {
offset = 1
path = handler
}
}
const callbacks = flatten.call(slice.call(arguments, offset), Infinity)
if (callbacks.length === 0) {
throw new TypeError('argument handler is required')
}
for (let i = 0; i < callbacks.length; i++) {
const fn = callbacks[i]
if (typeof fn !== 'function') {
throw new TypeError('argument handler must be a function')
}
// add the middleware
debug('use %o %s', path, fn.name || '<anonymous>')
const layer = new Layer(path, {
sensitive: this.caseSensitive,
strict: false,
end: false
}, fn)
layer.route = undefined
this.stack.push(layer)
}
return this
}
/**
* Create a new Route for the given path.
*
* Each route contains a separate middleware stack and VERB handlers.
*
* See the Route api documentation for details on adding handlers
* and middleware to routes.
*
* @param {string} path
* @return {Route}
* @public
*/
Router.prototype.route = function route (path) {
const route = new Route(path)
const layer = new Layer(path, {
sensitive: this.caseSensitive,
strict: this.strict,
end: true
}, handle)
function handle (req, res, next) {
route.dispatch(req, res, next)
}
layer.route = route
this.stack.push(layer)
return route
}
// create Router#VERB functions
methods.concat('all').forEach(function (method) {
Router.prototype[method] = function (path) {
const route = this.route(path)
route[method].apply(route, slice.call(arguments, 1))
return this
}
})
/**
* Generate a callback that will make an OPTIONS response.
*
* @param {OutgoingMessage} res
* @param {array} methods
* @private
*/
function generateOptionsResponder (res, methods) {
return function onDone (fn, err) {
if (err || methods.length === 0) {
return fn(err)
}
trySendOptionsResponse(res, methods, fn)
}
}
/**
* Get pathname of request.
*
* @param {IncomingMessage} req
* @private
*/
function getPathname (req) {
try {
return parseUrl(req).pathname
} catch (err) {
return undefined
}
}
/**
* Get get protocol + host for a URL.
*
* @param {string} url
* @private
*/
function getProtohost (url) {
if (typeof url !== 'string' || url.length === 0 || url[0] === '/') {
return undefined
}
const searchIndex = url.indexOf('?')
const pathLength = searchIndex !== -1
? searchIndex
: url.length
const fqdnIndex = url.substring(0, pathLength).indexOf('://')
return fqdnIndex !== -1
? url.substring(0, url.indexOf('/', 3 + fqdnIndex))
: undefined
}
/**
* Match path to a layer.
*
* @param {Layer} layer
* @param {string} path
* @private
*/
function matchLayer (layer, path) {
try {
return layer.match(path)
} catch (err) {
return err
}
}
/**
* Merge params with parent params
*
* @private
*/
function mergeParams (params, parent) {
if (typeof parent !== 'object' || !parent) {
return params
}
// make copy of parent for base
const obj = Object.assign({}, parent)
// simple non-numeric merging
if (!(0 in params) || !(0 in parent)) {
return Object.assign(obj, params)
}
let i = 0
let o = 0
// determine numeric gap in params
while (i in params) {
i++
}
// determine numeric gap in parent
while (o in parent) {
o++
}
// offset numeric indices in params before merge
for (i--; i >= 0; i--) {
params[i + o] = params[i]
// create holes for the merge when necessary
if (i < o) {
delete params[i]
}
}
return Object.assign(obj, params)
}
/**
* Process any parameters for the layer.
*
* @private
*/
function processParams (params, layer, called, req, res, done) {
// captured parameters from the layer, keys and values
const keys = layer.keys
// fast track
if (!keys || keys.length === 0) {
return done()
}
let i = 0
let paramIndex = 0
let key
let paramVal
let paramCallbacks
let paramCalled
// process params in order
// param callbacks can be async
function param (err) {
if (err) {
return done(err)
}
if (i >= keys.length) {
return done()
}
paramIndex = 0
key = keys[i++]
paramVal = req.params[key]
paramCallbacks = params[key]
paramCalled = called[key]
if (paramVal === undefined || !paramCallbacks) {
return param()
}
// param previously called with same value or error occurred
if (paramCalled && (paramCalled.match === paramVal ||
(paramCalled.error && paramCalled.error !== 'route'))) {
// restore value
req.params[key] = paramCalled.value
// next param
return param(paramCalled.error)
}
called[key] = paramCalled = {
error: null,
match: paramVal,
value: paramVal
}
paramCallback()
}
// single param callbacks
function paramCallback (err) {
const fn = paramCallbacks[paramIndex++]
// store updated value
paramCalled.value = req.params[key]
if (err) {
// store error
paramCalled.error = err
param(err)
return
}
if (!fn) return param()
try {
const ret = fn(req, res, paramCallback, paramVal, key)
if (isPromise(ret)) {
if (!(ret instanceof Promise)) {
deprecate('parameters that are Promise-like are deprecated, use a native Promise instead')
}
ret.then(null, function (error) {
paramCallback(error || new Error('Rejected promise'))
})
}
} catch (e) {
paramCallback(e)
}
}
param()
}
/**
* Restore obj props after function
*
* @private
*/
function restore (fn, obj) {
const props = new Array(arguments.length - 2)
const vals = new Array(arguments.length - 2)
for (let i = 0; i < props.length; i++) {
props[i] = arguments[i + 2]
vals[i] = obj[props[i]]
}
return function () {
// restore vals
for (let i = 0; i < props.length; i++) {
obj[props[i]] = vals[i]
}
return fn.apply(this, arguments)
}
}
/**
* Send an OPTIONS response.
*
* @private
*/
function sendOptionsResponse (res, methods) {
const options = Object.create(null)
// build unique method map
for (let i = 0; i < methods.length; i++) {
options[methods[i]] = true
}
// construct the allow list
const allow = Object.keys(options).sort().join(', ')
// send response
res.setHeader('Allow', allow)
res.setHeader('Content-Length', Buffer.byteLength(allow))
res.setHeader('Content-Type', 'text/plain')
res.setHeader('X-Content-Type-Options', 'nosniff')
res.end(allow)
}
/**
* Try to send an OPTIONS response.
*
* @private
*/
function trySendOptionsResponse (res, methods, next) {
try {
sendOptionsResponse(res, methods)
} catch (err) {
next(err)
}
}
/**
* Wrap a function
*
* @private
*/
function wrap (old, fn) {
return function proxy () {
const args = new Array(arguments.length + 1)
args[0] = old
for (let i = 0, len = arguments.length; i < len; i++) {
args[i + 1] = arguments[i]
}
fn.apply(this, args)
}
}

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node_modules/router/lib/layer.js generated vendored Normal file
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/*!
* router
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2022 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module dependencies.
* @private
*/
const isPromise = require('is-promise')
const pathRegexp = require('path-to-regexp')
const debug = require('debug')('router:layer')
const deprecate = require('depd')('router')
/**
* Module variables.
* @private
*/
const TRAILING_SLASH_REGEXP = /\/+$/
const MATCHING_GROUP_REGEXP = /\((?:\?<(.*?)>)?(?!\?)/g
/**
* Expose `Layer`.
*/
module.exports = Layer
function Layer (path, options, fn) {
if (!(this instanceof Layer)) {
return new Layer(path, options, fn)
}
debug('new %o', path)
const opts = options || {}
this.handle = fn
this.keys = []
this.name = fn.name || '<anonymous>'
this.params = undefined
this.path = undefined
this.slash = path === '/' && opts.end === false
function matcher (_path) {
if (_path instanceof RegExp) {
const keys = []
let name = 0
let m
// eslint-disable-next-line no-cond-assign
while (m = MATCHING_GROUP_REGEXP.exec(_path.source)) {
keys.push({
name: m[1] || name++,
offset: m.index
})
}
return function regexpMatcher (p) {
const match = _path.exec(p)
if (!match) {
return false
}
const params = {}
for (let i = 1; i < match.length; i++) {
const key = keys[i - 1]
const prop = key.name
const val = decodeParam(match[i])
if (val !== undefined) {
params[prop] = val
}
}
return {
params,
path: match[0]
}
}
}
return pathRegexp.match((opts.strict ? _path : loosen(_path)), {
sensitive: opts.sensitive,
end: opts.end,
trailing: !opts.strict,
decode: decodeParam
})
}
this.matchers = Array.isArray(path) ? path.map(matcher) : [matcher(path)]
}
/**
* Handle the error for the layer.
*
* @param {Error} error
* @param {Request} req
* @param {Response} res
* @param {function} next
* @api private
*/
Layer.prototype.handleError = function handleError (error, req, res, next) {
const fn = this.handle
if (fn.length !== 4) {
// not a standard error handler
return next(error)
}
try {
// invoke function
const ret = fn(error, req, res, next)
// wait for returned promise
if (isPromise(ret)) {
if (!(ret instanceof Promise)) {
deprecate('handlers that are Promise-like are deprecated, use a native Promise instead')
}
ret.then(null, function (error) {
next(error || new Error('Rejected promise'))
})
}
} catch (err) {
next(err)
}
}
/**
* Handle the request for the layer.
*
* @param {Request} req
* @param {Response} res
* @param {function} next
* @api private
*/
Layer.prototype.handleRequest = function handleRequest (req, res, next) {
const fn = this.handle
if (fn.length > 3) {
// not a standard request handler
return next()
}
try {
// invoke function
const ret = fn(req, res, next)
// wait for returned promise
if (isPromise(ret)) {
if (!(ret instanceof Promise)) {
deprecate('handlers that are Promise-like are deprecated, use a native Promise instead')
}
ret.then(null, function (error) {
next(error || new Error('Rejected promise'))
})
}
} catch (err) {
next(err)
}
}
/**
* Check if this route matches `path`, if so
* populate `.params`.
*
* @param {String} path
* @return {Boolean}
* @api private
*/
Layer.prototype.match = function match (path) {
let match
if (path != null) {
// fast path non-ending match for / (any path matches)
if (this.slash) {
this.params = {}
this.path = ''
return true
}
let i = 0
while (!match && i < this.matchers.length) {
// match the path
match = this.matchers[i](path)
i++
}
}
if (!match) {
this.params = undefined
this.path = undefined
return false
}
// store values
this.params = match.params
this.path = match.path
this.keys = Object.keys(match.params)
return true
}
/**
* Decode param value.
*
* @param {string} val
* @return {string}
* @private
*/
function decodeParam (val) {
if (typeof val !== 'string' || val.length === 0) {
return val
}
try {
return decodeURIComponent(val)
} catch (err) {
if (err instanceof URIError) {
err.message = 'Failed to decode param \'' + val + '\''
err.status = 400
}
throw err
}
}
/**
* Loosens the given path for path-to-regexp matching.
*/
function loosen (path) {
if (path instanceof RegExp || path === '/') {
return path
}
return Array.isArray(path)
? path.map(function (p) { return loosen(p) })
: String(path).replace(TRAILING_SLASH_REGEXP, '')
}

242
node_modules/router/lib/route.js generated vendored Normal file
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/*!
* router
* Copyright(c) 2013 Roman Shtylman
* Copyright(c) 2014-2022 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module dependencies.
* @private
*/
const debug = require('debug')('router:route')
const Layer = require('./layer')
const { METHODS } = require('node:http')
/**
* Module variables.
* @private
*/
const slice = Array.prototype.slice
const flatten = Array.prototype.flat
const methods = METHODS.map((method) => method.toLowerCase())
/**
* Expose `Route`.
*/
module.exports = Route
/**
* Initialize `Route` with the given `path`,
*
* @param {String} path
* @api private
*/
function Route (path) {
debug('new %o', path)
this.path = path
this.stack = []
// route handlers for various http methods
this.methods = Object.create(null)
}
/**
* @private
*/
Route.prototype._handlesMethod = function _handlesMethod (method) {
if (this.methods._all) {
return true
}
// normalize name
let name = typeof method === 'string'
? method.toLowerCase()
: method
if (name === 'head' && !this.methods.head) {
name = 'get'
}
return Boolean(this.methods[name])
}
/**
* @return {array} supported HTTP methods
* @private
*/
Route.prototype._methods = function _methods () {
const methods = Object.keys(this.methods)
// append automatic head
if (this.methods.get && !this.methods.head) {
methods.push('head')
}
for (let i = 0; i < methods.length; i++) {
// make upper case
methods[i] = methods[i].toUpperCase()
}
return methods
}
/**
* dispatch req, res into this route
*
* @private
*/
Route.prototype.dispatch = function dispatch (req, res, done) {
let idx = 0
const stack = this.stack
let sync = 0
if (stack.length === 0) {
return done()
}
let method = typeof req.method === 'string'
? req.method.toLowerCase()
: req.method
if (method === 'head' && !this.methods.head) {
method = 'get'
}
req.route = this
next()
function next (err) {
// signal to exit route
if (err && err === 'route') {
return done()
}
// signal to exit router
if (err && err === 'router') {
return done(err)
}
// no more matching layers
if (idx >= stack.length) {
return done(err)
}
// max sync stack
if (++sync > 100) {
return setImmediate(next, err)
}
let layer
let match
// find next matching layer
while (match !== true && idx < stack.length) {
layer = stack[idx++]
match = !layer.method || layer.method === method
}
// no match
if (match !== true) {
return done(err)
}
if (err) {
layer.handleError(err, req, res, next)
} else {
layer.handleRequest(req, res, next)
}
sync = 0
}
}
/**
* Add a handler for all HTTP verbs to this route.
*
* Behaves just like middleware and can respond or call `next`
* to continue processing.
*
* You can use multiple `.all` call to add multiple handlers.
*
* function check_something(req, res, next){
* next()
* }
*
* function validate_user(req, res, next){
* next()
* }
*
* route
* .all(validate_user)
* .all(check_something)
* .get(function(req, res, next){
* res.send('hello world')
* })
*
* @param {array|function} handler
* @return {Route} for chaining
* @api public
*/
Route.prototype.all = function all (handler) {
const callbacks = flatten.call(slice.call(arguments), Infinity)
if (callbacks.length === 0) {
throw new TypeError('argument handler is required')
}
for (let i = 0; i < callbacks.length; i++) {
const fn = callbacks[i]
if (typeof fn !== 'function') {
throw new TypeError('argument handler must be a function')
}
const layer = Layer('/', {}, fn)
layer.method = undefined
this.methods._all = true
this.stack.push(layer)
}
return this
}
methods.forEach(function (method) {
Route.prototype[method] = function (handler) {
const callbacks = flatten.call(slice.call(arguments), Infinity)
if (callbacks.length === 0) {
throw new TypeError('argument handler is required')
}
for (let i = 0; i < callbacks.length; i++) {
const fn = callbacks[i]
if (typeof fn !== 'function') {
throw new TypeError('argument handler must be a function')
}
debug('%s %s', method, this.path)
const layer = Layer('/', {}, fn)
layer.method = method
this.methods[method] = true
this.stack.push(layer)
}
return this
}
})

103
node_modules/router/node_modules/depd/History.md generated vendored Normal file
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2.0.0 / 2018-10-26
==================
* Drop support for Node.js 0.6
* Replace internal `eval` usage with `Function` constructor
* Use instance methods on `process` to check for listeners
1.1.2 / 2018-01-11
==================
* perf: remove argument reassignment
* Support Node.js 0.6 to 9.x
1.1.1 / 2017-07-27
==================
* Remove unnecessary `Buffer` loading
* Support Node.js 0.6 to 8.x
1.1.0 / 2015-09-14
==================
* Enable strict mode in more places
* Support io.js 3.x
* Support io.js 2.x
* Support web browser loading
- Requires bundler like Browserify or webpack
1.0.1 / 2015-04-07
==================
* Fix `TypeError`s when under `'use strict'` code
* Fix useless type name on auto-generated messages
* Support io.js 1.x
* Support Node.js 0.12
1.0.0 / 2014-09-17
==================
* No changes
0.4.5 / 2014-09-09
==================
* Improve call speed to functions using the function wrapper
* Support Node.js 0.6
0.4.4 / 2014-07-27
==================
* Work-around v8 generating empty stack traces
0.4.3 / 2014-07-26
==================
* Fix exception when global `Error.stackTraceLimit` is too low
0.4.2 / 2014-07-19
==================
* Correct call site for wrapped functions and properties
0.4.1 / 2014-07-19
==================
* Improve automatic message generation for function properties
0.4.0 / 2014-07-19
==================
* Add `TRACE_DEPRECATION` environment variable
* Remove non-standard grey color from color output
* Support `--no-deprecation` argument
* Support `--trace-deprecation` argument
* Support `deprecate.property(fn, prop, message)`
0.3.0 / 2014-06-16
==================
* Add `NO_DEPRECATION` environment variable
0.2.0 / 2014-06-15
==================
* Add `deprecate.property(obj, prop, message)`
* Remove `supports-color` dependency for node.js 0.8
0.1.0 / 2014-06-15
==================
* Add `deprecate.function(fn, message)`
* Add `process.on('deprecation', fn)` emitter
* Automatically generate message when omitted from `deprecate()`
0.0.1 / 2014-06-15
==================
* Fix warning for dynamic calls at singe call site
0.0.0 / 2014-06-15
==================
* Initial implementation

22
node_modules/router/node_modules/depd/LICENSE generated vendored Normal file
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(The MIT License)
Copyright (c) 2014-2018 Douglas Christopher Wilson
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

280
node_modules/router/node_modules/depd/Readme.md generated vendored Normal file
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# depd
[![NPM Version][npm-version-image]][npm-url]
[![NPM Downloads][npm-downloads-image]][npm-url]
[![Node.js Version][node-image]][node-url]
[![Linux Build][travis-image]][travis-url]
[![Windows Build][appveyor-image]][appveyor-url]
[![Coverage Status][coveralls-image]][coveralls-url]
Deprecate all the things
> With great modules comes great responsibility; mark things deprecated!
## Install
This module is installed directly using `npm`:
```sh
$ npm install depd
```
This module can also be bundled with systems like
[Browserify](http://browserify.org/) or [webpack](https://webpack.github.io/),
though by default this module will alter it's API to no longer display or
track deprecations.
## API
<!-- eslint-disable no-unused-vars -->
```js
var deprecate = require('depd')('my-module')
```
This library allows you to display deprecation messages to your users.
This library goes above and beyond with deprecation warnings by
introspection of the call stack (but only the bits that it is interested
in).
Instead of just warning on the first invocation of a deprecated
function and never again, this module will warn on the first invocation
of a deprecated function per unique call site, making it ideal to alert
users of all deprecated uses across the code base, rather than just
whatever happens to execute first.
The deprecation warnings from this module also include the file and line
information for the call into the module that the deprecated function was
in.
**NOTE** this library has a similar interface to the `debug` module, and
this module uses the calling file to get the boundary for the call stacks,
so you should always create a new `deprecate` object in each file and not
within some central file.
### depd(namespace)
Create a new deprecate function that uses the given namespace name in the
messages and will display the call site prior to the stack entering the
file this function was called from. It is highly suggested you use the
name of your module as the namespace.
### deprecate(message)
Call this function from deprecated code to display a deprecation message.
This message will appear once per unique caller site. Caller site is the
first call site in the stack in a different file from the caller of this
function.
If the message is omitted, a message is generated for you based on the site
of the `deprecate()` call and will display the name of the function called,
similar to the name displayed in a stack trace.
### deprecate.function(fn, message)
Call this function to wrap a given function in a deprecation message on any
call to the function. An optional message can be supplied to provide a custom
message.
### deprecate.property(obj, prop, message)
Call this function to wrap a given property on object in a deprecation message
on any accessing or setting of the property. An optional message can be supplied
to provide a custom message.
The method must be called on the object where the property belongs (not
inherited from the prototype).
If the property is a data descriptor, it will be converted to an accessor
descriptor in order to display the deprecation message.
### process.on('deprecation', fn)
This module will allow easy capturing of deprecation errors by emitting the
errors as the type "deprecation" on the global `process`. If there are no
listeners for this type, the errors are written to STDERR as normal, but if
there are any listeners, nothing will be written to STDERR and instead only
emitted. From there, you can write the errors in a different format or to a
logging source.
The error represents the deprecation and is emitted only once with the same
rules as writing to STDERR. The error has the following properties:
- `message` - This is the message given by the library
- `name` - This is always `'DeprecationError'`
- `namespace` - This is the namespace the deprecation came from
- `stack` - This is the stack of the call to the deprecated thing
Example `error.stack` output:
```
DeprecationError: my-cool-module deprecated oldfunction
at Object.<anonymous> ([eval]-wrapper:6:22)
at Module._compile (module.js:456:26)
at evalScript (node.js:532:25)
at startup (node.js:80:7)
at node.js:902:3
```
### process.env.NO_DEPRECATION
As a user of modules that are deprecated, the environment variable `NO_DEPRECATION`
is provided as a quick solution to silencing deprecation warnings from being
output. The format of this is similar to that of `DEBUG`:
```sh
$ NO_DEPRECATION=my-module,othermod node app.js
```
This will suppress deprecations from being output for "my-module" and "othermod".
The value is a list of comma-separated namespaces. To suppress every warning
across all namespaces, use the value `*` for a namespace.
Providing the argument `--no-deprecation` to the `node` executable will suppress
all deprecations (only available in Node.js 0.8 or higher).
**NOTE** This will not suppress the deperecations given to any "deprecation"
event listeners, just the output to STDERR.
### process.env.TRACE_DEPRECATION
As a user of modules that are deprecated, the environment variable `TRACE_DEPRECATION`
is provided as a solution to getting more detailed location information in deprecation
warnings by including the entire stack trace. The format of this is the same as
`NO_DEPRECATION`:
```sh
$ TRACE_DEPRECATION=my-module,othermod node app.js
```
This will include stack traces for deprecations being output for "my-module" and
"othermod". The value is a list of comma-separated namespaces. To trace every
warning across all namespaces, use the value `*` for a namespace.
Providing the argument `--trace-deprecation` to the `node` executable will trace
all deprecations (only available in Node.js 0.8 or higher).
**NOTE** This will not trace the deperecations silenced by `NO_DEPRECATION`.
## Display
![message](files/message.png)
When a user calls a function in your library that you mark deprecated, they
will see the following written to STDERR (in the given colors, similar colors
and layout to the `debug` module):
```
bright cyan bright yellow
| | reset cyan
| | | |
▼ ▼ ▼ ▼
my-cool-module deprecated oldfunction [eval]-wrapper:6:22
▲ ▲ ▲ ▲
| | | |
namespace | | location of mycoolmod.oldfunction() call
| deprecation message
the word "deprecated"
```
If the user redirects their STDERR to a file or somewhere that does not support
colors, they see (similar layout to the `debug` module):
```
Sun, 15 Jun 2014 05:21:37 GMT my-cool-module deprecated oldfunction at [eval]-wrapper:6:22
▲ ▲ ▲ ▲ ▲
| | | | |
timestamp of message namespace | | location of mycoolmod.oldfunction() call
| deprecation message
the word "deprecated"
```
## Examples
### Deprecating all calls to a function
This will display a deprecated message about "oldfunction" being deprecated
from "my-module" on STDERR.
```js
var deprecate = require('depd')('my-cool-module')
// message automatically derived from function name
// Object.oldfunction
exports.oldfunction = deprecate.function(function oldfunction () {
// all calls to function are deprecated
})
// specific message
exports.oldfunction = deprecate.function(function () {
// all calls to function are deprecated
}, 'oldfunction')
```
### Conditionally deprecating a function call
This will display a deprecated message about "weirdfunction" being deprecated
from "my-module" on STDERR when called with less than 2 arguments.
```js
var deprecate = require('depd')('my-cool-module')
exports.weirdfunction = function () {
if (arguments.length < 2) {
// calls with 0 or 1 args are deprecated
deprecate('weirdfunction args < 2')
}
}
```
When calling `deprecate` as a function, the warning is counted per call site
within your own module, so you can display different deprecations depending
on different situations and the users will still get all the warnings:
```js
var deprecate = require('depd')('my-cool-module')
exports.weirdfunction = function () {
if (arguments.length < 2) {
// calls with 0 or 1 args are deprecated
deprecate('weirdfunction args < 2')
} else if (typeof arguments[0] !== 'string') {
// calls with non-string first argument are deprecated
deprecate('weirdfunction non-string first arg')
}
}
```
### Deprecating property access
This will display a deprecated message about "oldprop" being deprecated
from "my-module" on STDERR when accessed. A deprecation will be displayed
when setting the value and when getting the value.
```js
var deprecate = require('depd')('my-cool-module')
exports.oldprop = 'something'
// message automatically derives from property name
deprecate.property(exports, 'oldprop')
// explicit message
deprecate.property(exports, 'oldprop', 'oldprop >= 0.10')
```
## License
[MIT](LICENSE)
[appveyor-image]: https://badgen.net/appveyor/ci/dougwilson/nodejs-depd/master?label=windows
[appveyor-url]: https://ci.appveyor.com/project/dougwilson/nodejs-depd
[coveralls-image]: https://badgen.net/coveralls/c/github/dougwilson/nodejs-depd/master
[coveralls-url]: https://coveralls.io/r/dougwilson/nodejs-depd?branch=master
[node-image]: https://badgen.net/npm/node/depd
[node-url]: https://nodejs.org/en/download/
[npm-downloads-image]: https://badgen.net/npm/dm/depd
[npm-url]: https://npmjs.org/package/depd
[npm-version-image]: https://badgen.net/npm/v/depd
[travis-image]: https://badgen.net/travis/dougwilson/nodejs-depd/master?label=linux
[travis-url]: https://travis-ci.org/dougwilson/nodejs-depd

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/*!
* depd
* Copyright(c) 2014-2018 Douglas Christopher Wilson
* MIT Licensed
*/
/**
* Module dependencies.
*/
var relative = require('path').relative
/**
* Module exports.
*/
module.exports = depd
/**
* Get the path to base files on.
*/
var basePath = process.cwd()
/**
* Determine if namespace is contained in the string.
*/
function containsNamespace (str, namespace) {
var vals = str.split(/[ ,]+/)
var ns = String(namespace).toLowerCase()
for (var i = 0; i < vals.length; i++) {
var val = vals[i]
// namespace contained
if (val && (val === '*' || val.toLowerCase() === ns)) {
return true
}
}
return false
}
/**
* Convert a data descriptor to accessor descriptor.
*/
function convertDataDescriptorToAccessor (obj, prop, message) {
var descriptor = Object.getOwnPropertyDescriptor(obj, prop)
var value = descriptor.value
descriptor.get = function getter () { return value }
if (descriptor.writable) {
descriptor.set = function setter (val) { return (value = val) }
}
delete descriptor.value
delete descriptor.writable
Object.defineProperty(obj, prop, descriptor)
return descriptor
}
/**
* Create arguments string to keep arity.
*/
function createArgumentsString (arity) {
var str = ''
for (var i = 0; i < arity; i++) {
str += ', arg' + i
}
return str.substr(2)
}
/**
* Create stack string from stack.
*/
function createStackString (stack) {
var str = this.name + ': ' + this.namespace
if (this.message) {
str += ' deprecated ' + this.message
}
for (var i = 0; i < stack.length; i++) {
str += '\n at ' + stack[i].toString()
}
return str
}
/**
* Create deprecate for namespace in caller.
*/
function depd (namespace) {
if (!namespace) {
throw new TypeError('argument namespace is required')
}
var stack = getStack()
var site = callSiteLocation(stack[1])
var file = site[0]
function deprecate (message) {
// call to self as log
log.call(deprecate, message)
}
deprecate._file = file
deprecate._ignored = isignored(namespace)
deprecate._namespace = namespace
deprecate._traced = istraced(namespace)
deprecate._warned = Object.create(null)
deprecate.function = wrapfunction
deprecate.property = wrapproperty
return deprecate
}
/**
* Determine if event emitter has listeners of a given type.
*
* The way to do this check is done three different ways in Node.js >= 0.8
* so this consolidates them into a minimal set using instance methods.
*
* @param {EventEmitter} emitter
* @param {string} type
* @returns {boolean}
* @private
*/
function eehaslisteners (emitter, type) {
var count = typeof emitter.listenerCount !== 'function'
? emitter.listeners(type).length
: emitter.listenerCount(type)
return count > 0
}
/**
* Determine if namespace is ignored.
*/
function isignored (namespace) {
if (process.noDeprecation) {
// --no-deprecation support
return true
}
var str = process.env.NO_DEPRECATION || ''
// namespace ignored
return containsNamespace(str, namespace)
}
/**
* Determine if namespace is traced.
*/
function istraced (namespace) {
if (process.traceDeprecation) {
// --trace-deprecation support
return true
}
var str = process.env.TRACE_DEPRECATION || ''
// namespace traced
return containsNamespace(str, namespace)
}
/**
* Display deprecation message.
*/
function log (message, site) {
var haslisteners = eehaslisteners(process, 'deprecation')
// abort early if no destination
if (!haslisteners && this._ignored) {
return
}
var caller
var callFile
var callSite
var depSite
var i = 0
var seen = false
var stack = getStack()
var file = this._file
if (site) {
// provided site
depSite = site
callSite = callSiteLocation(stack[1])
callSite.name = depSite.name
file = callSite[0]
} else {
// get call site
i = 2
depSite = callSiteLocation(stack[i])
callSite = depSite
}
// get caller of deprecated thing in relation to file
for (; i < stack.length; i++) {
caller = callSiteLocation(stack[i])
callFile = caller[0]
if (callFile === file) {
seen = true
} else if (callFile === this._file) {
file = this._file
} else if (seen) {
break
}
}
var key = caller
? depSite.join(':') + '__' + caller.join(':')
: undefined
if (key !== undefined && key in this._warned) {
// already warned
return
}
this._warned[key] = true
// generate automatic message from call site
var msg = message
if (!msg) {
msg = callSite === depSite || !callSite.name
? defaultMessage(depSite)
: defaultMessage(callSite)
}
// emit deprecation if listeners exist
if (haslisteners) {
var err = DeprecationError(this._namespace, msg, stack.slice(i))
process.emit('deprecation', err)
return
}
// format and write message
var format = process.stderr.isTTY
? formatColor
: formatPlain
var output = format.call(this, msg, caller, stack.slice(i))
process.stderr.write(output + '\n', 'utf8')
}
/**
* Get call site location as array.
*/
function callSiteLocation (callSite) {
var file = callSite.getFileName() || '<anonymous>'
var line = callSite.getLineNumber()
var colm = callSite.getColumnNumber()
if (callSite.isEval()) {
file = callSite.getEvalOrigin() + ', ' + file
}
var site = [file, line, colm]
site.callSite = callSite
site.name = callSite.getFunctionName()
return site
}
/**
* Generate a default message from the site.
*/
function defaultMessage (site) {
var callSite = site.callSite
var funcName = site.name
// make useful anonymous name
if (!funcName) {
funcName = '<anonymous@' + formatLocation(site) + '>'
}
var context = callSite.getThis()
var typeName = context && callSite.getTypeName()
// ignore useless type name
if (typeName === 'Object') {
typeName = undefined
}
// make useful type name
if (typeName === 'Function') {
typeName = context.name || typeName
}
return typeName && callSite.getMethodName()
? typeName + '.' + funcName
: funcName
}
/**
* Format deprecation message without color.
*/
function formatPlain (msg, caller, stack) {
var timestamp = new Date().toUTCString()
var formatted = timestamp +
' ' + this._namespace +
' deprecated ' + msg
// add stack trace
if (this._traced) {
for (var i = 0; i < stack.length; i++) {
formatted += '\n at ' + stack[i].toString()
}
return formatted
}
if (caller) {
formatted += ' at ' + formatLocation(caller)
}
return formatted
}
/**
* Format deprecation message with color.
*/
function formatColor (msg, caller, stack) {
var formatted = '\x1b[36;1m' + this._namespace + '\x1b[22;39m' + // bold cyan
' \x1b[33;1mdeprecated\x1b[22;39m' + // bold yellow
' \x1b[0m' + msg + '\x1b[39m' // reset
// add stack trace
if (this._traced) {
for (var i = 0; i < stack.length; i++) {
formatted += '\n \x1b[36mat ' + stack[i].toString() + '\x1b[39m' // cyan
}
return formatted
}
if (caller) {
formatted += ' \x1b[36m' + formatLocation(caller) + '\x1b[39m' // cyan
}
return formatted
}
/**
* Format call site location.
*/
function formatLocation (callSite) {
return relative(basePath, callSite[0]) +
':' + callSite[1] +
':' + callSite[2]
}
/**
* Get the stack as array of call sites.
*/
function getStack () {
var limit = Error.stackTraceLimit
var obj = {}
var prep = Error.prepareStackTrace
Error.prepareStackTrace = prepareObjectStackTrace
Error.stackTraceLimit = Math.max(10, limit)
// capture the stack
Error.captureStackTrace(obj)
// slice this function off the top
var stack = obj.stack.slice(1)
Error.prepareStackTrace = prep
Error.stackTraceLimit = limit
return stack
}
/**
* Capture call site stack from v8.
*/
function prepareObjectStackTrace (obj, stack) {
return stack
}
/**
* Return a wrapped function in a deprecation message.
*/
function wrapfunction (fn, message) {
if (typeof fn !== 'function') {
throw new TypeError('argument fn must be a function')
}
var args = createArgumentsString(fn.length)
var stack = getStack()
var site = callSiteLocation(stack[1])
site.name = fn.name
// eslint-disable-next-line no-new-func
var deprecatedfn = new Function('fn', 'log', 'deprecate', 'message', 'site',
'"use strict"\n' +
'return function (' + args + ') {' +
'log.call(deprecate, message, site)\n' +
'return fn.apply(this, arguments)\n' +
'}')(fn, log, this, message, site)
return deprecatedfn
}
/**
* Wrap property in a deprecation message.
*/
function wrapproperty (obj, prop, message) {
if (!obj || (typeof obj !== 'object' && typeof obj !== 'function')) {
throw new TypeError('argument obj must be object')
}
var descriptor = Object.getOwnPropertyDescriptor(obj, prop)
if (!descriptor) {
throw new TypeError('must call property on owner object')
}
if (!descriptor.configurable) {
throw new TypeError('property must be configurable')
}
var deprecate = this
var stack = getStack()
var site = callSiteLocation(stack[1])
// set site name
site.name = prop
// convert data descriptor
if ('value' in descriptor) {
descriptor = convertDataDescriptorToAccessor(obj, prop, message)
}
var get = descriptor.get
var set = descriptor.set
// wrap getter
if (typeof get === 'function') {
descriptor.get = function getter () {
log.call(deprecate, message, site)
return get.apply(this, arguments)
}
}
// wrap setter
if (typeof set === 'function') {
descriptor.set = function setter () {
log.call(deprecate, message, site)
return set.apply(this, arguments)
}
}
Object.defineProperty(obj, prop, descriptor)
}
/**
* Create DeprecationError for deprecation
*/
function DeprecationError (namespace, message, stack) {
var error = new Error()
var stackString
Object.defineProperty(error, 'constructor', {
value: DeprecationError
})
Object.defineProperty(error, 'message', {
configurable: true,
enumerable: false,
value: message,
writable: true
})
Object.defineProperty(error, 'name', {
enumerable: false,
configurable: true,
value: 'DeprecationError',
writable: true
})
Object.defineProperty(error, 'namespace', {
configurable: true,
enumerable: false,
value: namespace,
writable: true
})
Object.defineProperty(error, 'stack', {
configurable: true,
enumerable: false,
get: function () {
if (stackString !== undefined) {
return stackString
}
// prepare stack trace
return (stackString = createStackString.call(this, stack))
},
set: function setter (val) {
stackString = val
}
})
return error
}

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/*!
* depd
* Copyright(c) 2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module exports.
* @public
*/
module.exports = depd
/**
* Create deprecate for namespace in caller.
*/
function depd (namespace) {
if (!namespace) {
throw new TypeError('argument namespace is required')
}
function deprecate (message) {
// no-op in browser
}
deprecate._file = undefined
deprecate._ignored = true
deprecate._namespace = namespace
deprecate._traced = false
deprecate._warned = Object.create(null)
deprecate.function = wrapfunction
deprecate.property = wrapproperty
return deprecate
}
/**
* Return a wrapped function in a deprecation message.
*
* This is a no-op version of the wrapper, which does nothing but call
* validation.
*/
function wrapfunction (fn, message) {
if (typeof fn !== 'function') {
throw new TypeError('argument fn must be a function')
}
return fn
}
/**
* Wrap property in a deprecation message.
*
* This is a no-op version of the wrapper, which does nothing but call
* validation.
*/
function wrapproperty (obj, prop, message) {
if (!obj || (typeof obj !== 'object' && typeof obj !== 'function')) {
throw new TypeError('argument obj must be object')
}
var descriptor = Object.getOwnPropertyDescriptor(obj, prop)
if (!descriptor) {
throw new TypeError('must call property on owner object')
}
if (!descriptor.configurable) {
throw new TypeError('property must be configurable')
}
}

45
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{
"name": "depd",
"description": "Deprecate all the things",
"version": "2.0.0",
"author": "Douglas Christopher Wilson <doug@somethingdoug.com>",
"license": "MIT",
"keywords": [
"deprecate",
"deprecated"
],
"repository": "dougwilson/nodejs-depd",
"browser": "lib/browser/index.js",
"devDependencies": {
"benchmark": "2.1.4",
"beautify-benchmark": "0.2.4",
"eslint": "5.7.0",
"eslint-config-standard": "12.0.0",
"eslint-plugin-import": "2.14.0",
"eslint-plugin-markdown": "1.0.0-beta.7",
"eslint-plugin-node": "7.0.1",
"eslint-plugin-promise": "4.0.1",
"eslint-plugin-standard": "4.0.0",
"istanbul": "0.4.5",
"mocha": "5.2.0",
"safe-buffer": "5.1.2",
"uid-safe": "2.1.5"
},
"files": [
"lib/",
"History.md",
"LICENSE",
"index.js",
"Readme.md"
],
"engines": {
"node": ">= 0.8"
},
"scripts": {
"bench": "node benchmark/index.js",
"lint": "eslint --plugin markdown --ext js,md .",
"test": "mocha --reporter spec --bail test/",
"test-ci": "istanbul cover --print=none node_modules/mocha/bin/_mocha -- --reporter spec test/ && istanbul report lcovonly text-summary",
"test-cov": "istanbul cover --print=none node_modules/mocha/bin/_mocha -- --reporter dot test/ && istanbul report lcov text-summary"
}
}

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{
"name": "router",
"description": "Simple middleware-style router",
"version": "2.2.0",
"author": "Douglas Christopher Wilson <doug@somethingdoug.com>",
"contributors": [
"Blake Embrey <hello@blakeembrey.com>"
],
"license": "MIT",
"repository": "pillarjs/router",
"dependencies": {
"debug": "^4.4.0",
"depd": "^2.0.0",
"is-promise": "^4.0.0",
"parseurl": "^1.3.3",
"path-to-regexp": "^8.0.0"
},
"devDependencies": {
"finalhandler": "^2.1.0",
"mocha": "10.2.0",
"nyc": "15.1.0",
"run-series": "^1.1.9",
"standard": "^17.1.0",
"supertest": "6.3.3"
},
"files": [
"lib/",
"LICENSE",
"HISTORY.md",
"README.md",
"index.js"
],
"engines": {
"node": ">= 18"
},
"scripts": {
"lint": "standard",
"test": "mocha --reporter spec --bail --check-leaks test/",
"test:debug": "mocha --reporter spec --bail --check-leaks test/ --inspect --inspect-brk",
"test-ci": "nyc --reporter=lcov --reporter=text npm test",
"test-cov": "nyc --reporter=text npm test",
"version": "node scripts/version-history.js && git add HISTORY.md"
}
}