You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
237 lines
9.5 KiB
237 lines
9.5 KiB
# Light my Request
|
|
|
|
[](https://travis-ci.org/fastify/light-my-request)
|
|
[](http://standardjs.com/)
|
|
|
|
Injects a fake HTTP request/response into a node HTTP server for simulating server logic, writing tests, or debugging.
|
|
Does not use a socket connection so can be run against an inactive server (server not in listen mode).
|
|
|
|
## Example
|
|
|
|
```javascript
|
|
const http = require('http')
|
|
const inject = require('light-my-request')
|
|
|
|
const dispatch = function (req, res) {
|
|
const reply = 'Hello World'
|
|
res.writeHead(200, { 'Content-Type': 'text/plain', 'Content-Length': reply.length })
|
|
res.end(reply)
|
|
}
|
|
|
|
const server = http.createServer(dispatch)
|
|
|
|
inject(dispatch, { method: 'get', url: '/' }, (err, res) => {
|
|
console.log(res.payload)
|
|
})
|
|
```
|
|
Note how `server.listen` is never called.
|
|
|
|
Async await and promises are supported as well!
|
|
```javascript
|
|
// promises
|
|
inject(dispatch, { method: 'get', url: '/' })
|
|
.then(res => console.log(res.payload))
|
|
.catch(console.log)
|
|
|
|
// async-await
|
|
try {
|
|
const res = await inject(dispatch, { method: 'get', url: '/' })
|
|
console.log(res.payload)
|
|
} catch (err) {
|
|
console.log(err)
|
|
}
|
|
```
|
|
|
|
You can also use chaining methods if you do not pass the callback function. Check [here](#method-chaining) for details.
|
|
|
|
```js
|
|
// chaining methods
|
|
inject(dispatch)
|
|
.get('/') // set the request method to GET, and request URL to '/'
|
|
.headers({ foo: 'bar' }) // set the request headers
|
|
.query({ foo: 'bar' }) // set the query parameters
|
|
.end((err, res) => {
|
|
console.log(res.payload)
|
|
})
|
|
|
|
inject(dispatch)
|
|
.post('/') // set the request method to POST, and request URL to '/'
|
|
.payload('request payload') // set the request payload
|
|
.body('request body') // alias for payload
|
|
.end((err, res) => {
|
|
console.log(res.payload)
|
|
})
|
|
|
|
// async-await is also supported
|
|
try {
|
|
const chain = inject(dispatch).get('/')
|
|
const res = await chain.end()
|
|
console.log(res.payload)
|
|
} catch (err) {
|
|
console.log(err)
|
|
}
|
|
```
|
|
|
|
File uploads (`multipart/form-data`) or form submit (`x-www-form-urlencoded`) can be achieved by using [form-auto-content](https://github.com/Eomm/form-auto-content) package as shown below:
|
|
|
|
```js
|
|
const formAutoContent = require('form-auto-content')
|
|
const fs = require('fs')
|
|
|
|
try {
|
|
const form = formAutoContent({
|
|
myField: 'hello',
|
|
myFile: fs.createReadStream(`./path/to/file`)
|
|
})
|
|
|
|
const res = await inject(dispatch, {
|
|
method: 'post',
|
|
url: '/upload',
|
|
...form
|
|
})
|
|
console.log(res.payload)
|
|
} catch (err) {
|
|
console.log(err)
|
|
}
|
|
```
|
|
|
|
This module ships with a handwritten TypeScript declaration file for TS support. The declaration exports a single namespace `LightMyRequest`. You can import it one of two ways:
|
|
```typescript
|
|
import * as LightMyRequest from 'light-my-request'
|
|
|
|
const dispatch: LightMyRequest.DispatchFunc = function (req, res) {
|
|
const reply = 'Hello World'
|
|
res.writeHead(200, { 'Content-Type': 'text/plain', 'Content-Length': reply.length })
|
|
res.end(reply)
|
|
}
|
|
|
|
LightMyRequest.inject(dispatch, { method: 'get', url: '/' }, (err, res) => {
|
|
console.log(res.payload)
|
|
})
|
|
|
|
// or
|
|
import { inject, DistpatchFunc } from 'light-my-request'
|
|
|
|
const dispatch: DispatchFunc = function (req, res) {
|
|
const reply = 'Hello World'
|
|
res.writeHead(200, { 'Content-Type': 'text/plain', 'Content-Length': reply.length })
|
|
res.end(reply)
|
|
}
|
|
|
|
inject(dispatch, { method: 'get', url: '/' }, (err, res) => {
|
|
console.log(res.payload)
|
|
})
|
|
```
|
|
The declaration file exports types for the following parts of the API:
|
|
- `inject` - standard light-my-request `inject` method
|
|
- `DispatchFunc` - the fake HTTP dispatch function
|
|
- `InjectPayload` - a union type for valid payload types
|
|
- `isInjection` - standard light-my-request `isInjection` method
|
|
- `InjectOptions` - options object for `inject` method
|
|
- `Request` - custom light-my-request `request` object interface. Extends Node.js `stream.Readable` type
|
|
- `Response` - custom light-my-request `response` object interface. Extends Node.js `http.ServerResponse` type
|
|
|
|
## API
|
|
|
|
#### `inject(dispatchFunc[, options, callback])`
|
|
|
|
Injects a fake request into an HTTP server.
|
|
|
|
- `dispatchFunc` - listener function. The same as you would pass to `Http.createServer` when making a node HTTP server. Has the signature `function (req, res)` where:
|
|
- `req` - a simulated request object. Inherits from `Stream.Readable`.
|
|
- `res` - a simulated response object. Inherits from node's `Http.ServerResponse`.
|
|
- `options` - request options object where:
|
|
- `url` | `path` - a string specifying the request URL.
|
|
- `method` - a string specifying the HTTP request method, defaulting to `'GET'`.
|
|
- `authority` - a string specifying the HTTP HOST header value to be used if no header is provided, and the `url`
|
|
does not include an authority component. Defaults to `'localhost'`.
|
|
- `headers` - an optional object containing request headers.
|
|
- `cookies` - an optional object containing key-value pairs that will be encoded and added to `cookie` header. If the header is already set, the data will be appended.
|
|
- `remoteAddress` - an optional string specifying the client remote address. Defaults to `'127.0.0.1'`.
|
|
- `payload` - an optional request payload. Can be a string, Buffer, Stream or object. If the payload is string, Buffer or Stream is used as is as the request payload. Oherwise it is serialized with `JSON.stringify` forcing the request to have the `Content-type` equal to `application/json`
|
|
- `query` - an optional object containing query parameters.
|
|
- `body` - alias for payload.
|
|
- `simulate` - an object containing flags to simulate various conditions:
|
|
- `end` - indicates whether the request will fire an `end` event. Defaults to `undefined`, meaning an `end` event will fire.
|
|
- `split` - indicates whether the request payload will be split into chunks. Defaults to `undefined`, meaning payload will not be chunked.
|
|
- `error` - whether the request will emit an `error` event. Defaults to `undefined`, meaning no `error` event will be emitted. If set to `true`, the emitted error will have a message of `'Simulated'`.
|
|
- `close` - whether the request will emit a `close` event. Defaults to `undefined`, meaning no `close` event will be emitted.
|
|
- `validate` - Optional flag to validate this options object. Defaults to `true`.
|
|
- `server` - Optional http server. It is used for binding the `dispatchFunc`.
|
|
- `autoStart` - Automatically start the request as soon as the method
|
|
is called. It is only valid when not passing a callback. Defaults to `true`.
|
|
- `callback` - the callback function using the signature `function (err, res)` where:
|
|
- `err` - error object
|
|
- `res` - a response object where:
|
|
- `raw` - an object containing the raw request and response objects where:
|
|
- `req` - the simulated request object.
|
|
- `res` - the simulated response object.
|
|
- `headers` - an object containing the response headers.
|
|
- `statusCode` - the HTTP status code.
|
|
- `statusMessage` - the HTTP status message.
|
|
- `payload` - the payload as a UTF-8 encoded string.
|
|
- `body` - alias for payload.
|
|
- `rawPayload` - the raw payload as a Buffer.
|
|
- `trailers` - an object containing the response trailers.
|
|
- `json` - a function that parses the `application/json` response payload and returns an object. Throws if the content type does not contain `application/json`.
|
|
- `cookies` - a getter that parses the `set-cookie` response header and returns an array with all the cookies and their metadata.
|
|
|
|
Note: You can also pass a string in place of the `options` object as a shorthand for `{url: string, method: 'GET'}`.
|
|
|
|
#### `inject.isInjection(obj)`
|
|
|
|
Checks if given object `obj` is a *light-my-request* `Request` object.
|
|
|
|
#### Method chaining
|
|
|
|
There are following methods you can used as chaining:
|
|
- `delete`, `get`, `head`, `options`, `patch`, `post`, `put`, `trace`. They will set the HTTP request method and also the request URL.
|
|
- `body`, `headers`, `payload`, `query`, `cookies`. They can be used to set the request options object.
|
|
|
|
And finally you need to call `end`. It has the signature `function (callback)`.
|
|
If you invoke `end` without a callback function, the method will return a promise, thus you can:
|
|
|
|
```js
|
|
const chain = inject(dispatch).get('/')
|
|
|
|
try {
|
|
const res = await chain.end()
|
|
console.log(res.payload)
|
|
} catch (err) {
|
|
// handle error
|
|
}
|
|
|
|
// or
|
|
chain.end()
|
|
.then(res => {
|
|
console.log(res.payload)
|
|
})
|
|
.catch(err => {
|
|
// handle error
|
|
})
|
|
```
|
|
|
|
By the way, you can also use promises without calling `end`!
|
|
|
|
```js
|
|
inject(dispatch)
|
|
.get('/')
|
|
.then(res => {
|
|
console.log(res.payload)
|
|
})
|
|
.catch(err => {
|
|
// handle error
|
|
})
|
|
```
|
|
|
|
Note: The application would not respond multiple times. If you try to invoking any method after the application has responded, the application would throw an error.
|
|
|
|
## Acknowledgements
|
|
This project has been forked from [`hapi/shot`](https://github.com/hapijs/shot) because we wanted to support *Node ≥ v4* and not only *Node ≥ v8*.
|
|
All the credits before the commit [00a2a82](https://github.com/fastify/light-my-request/commit/00a2a82eb773b765003b6085788cc3564cd08326) goes to the `hapi/shot` project [contributors](https://github.com/hapijs/shot/graphs/contributors).
|
|
Since the commit [db8bced](https://github.com/fastify/light-my-request/commit/db8bced10b4367731688c8738621d42f39680efc) the project will be maintained by the Fastify team.
|
|
|
|
## License
|
|
|
|
Licensed under [BSD-3-Clause](./LICENSE).
|