mirror of
https://github.com/titanscouting/tra-analysis.git
synced 2024-11-13 22:56:18 +00:00
307 lines
8.7 KiB
Markdown
307 lines
8.7 KiB
Markdown
# send
|
|
|
|
[![NPM Version][npm-image]][npm-url]
|
|
[![NPM Downloads][downloads-image]][downloads-url]
|
|
[![Linux Build][travis-image]][travis-url]
|
|
[![Windows Build][appveyor-image]][appveyor-url]
|
|
[![Test Coverage][coveralls-image]][coveralls-url]
|
|
|
|
Send is a library for streaming files from the file system as a http response
|
|
supporting partial responses (Ranges), conditional-GET negotiation (If-Match,
|
|
If-Unmodified-Since, If-None-Match, If-Modified-Since), high test coverage,
|
|
and granular events which may be leveraged to take appropriate actions in your
|
|
application or framework.
|
|
|
|
Looking to serve up entire folders mapped to URLs? Try [serve-static](https://www.npmjs.org/package/serve-static).
|
|
|
|
## 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 send
|
|
```
|
|
|
|
## API
|
|
|
|
<!-- eslint-disable no-unused-vars -->
|
|
|
|
```js
|
|
var send = require('send')
|
|
```
|
|
|
|
### send(req, path, [options])
|
|
|
|
Create a new `SendStream` for the given path to send to a `res`. The `req` is
|
|
the Node.js HTTP request and the `path` is a urlencoded path to send (urlencoded,
|
|
not the actual file-system path).
|
|
|
|
#### Options
|
|
|
|
##### acceptRanges
|
|
|
|
Enable or disable accepting ranged requests, defaults to true.
|
|
Disabling this will not send `Accept-Ranges` and ignore the contents
|
|
of the `Range` request header.
|
|
|
|
##### cacheControl
|
|
|
|
Enable or disable setting `Cache-Control` response header, defaults to
|
|
true. Disabling this will ignore the `immutable` and `maxAge` options.
|
|
|
|
##### dotfiles
|
|
|
|
Set how "dotfiles" are treated when encountered. A dotfile is a file
|
|
or directory that begins with a dot ("."). Note this check is done on
|
|
the path itself without checking if the path actually exists on the
|
|
disk. If `root` is specified, only the dotfiles above the root are
|
|
checked (i.e. the root itself can be within a dotfile when when set
|
|
to "deny").
|
|
|
|
- `'allow'` No special treatment for dotfiles.
|
|
- `'deny'` Send a 403 for any request for a dotfile.
|
|
- `'ignore'` Pretend like the dotfile does not exist and 404.
|
|
|
|
The default value is _similar_ to `'ignore'`, with the exception that
|
|
this default will not ignore the files within a directory that begins
|
|
with a dot, for backward-compatibility.
|
|
|
|
##### end
|
|
|
|
Byte offset at which the stream ends, defaults to the length of the file
|
|
minus 1. The end is inclusive in the stream, meaning `end: 3` will include
|
|
the 4th byte in the stream.
|
|
|
|
##### etag
|
|
|
|
Enable or disable etag generation, defaults to true.
|
|
|
|
##### extensions
|
|
|
|
If a given file doesn't exist, try appending one of the given extensions,
|
|
in the given order. By default, this is disabled (set to `false`). An
|
|
example value that will serve extension-less HTML files: `['html', 'htm']`.
|
|
This is skipped if the requested file already has an extension.
|
|
|
|
##### immutable
|
|
|
|
Enable or diable the `immutable` directive in the `Cache-Control` response
|
|
header, defaults to `false`. If set to `true`, the `maxAge` option should
|
|
also be specified to enable caching. The `immutable` directive will prevent
|
|
supported clients from making conditional requests during the life of the
|
|
`maxAge` option to check if the file has changed.
|
|
|
|
##### index
|
|
|
|
By default send supports "index.html" files, to disable this
|
|
set `false` or to supply a new index pass a string or an array
|
|
in preferred order.
|
|
|
|
##### lastModified
|
|
|
|
Enable or disable `Last-Modified` header, defaults to true. Uses the file
|
|
system's last modified value.
|
|
|
|
##### maxAge
|
|
|
|
Provide a max-age in milliseconds for http caching, defaults to 0.
|
|
This can also be a string accepted by the
|
|
[ms](https://www.npmjs.org/package/ms#readme) module.
|
|
|
|
##### root
|
|
|
|
Serve files relative to `path`.
|
|
|
|
##### start
|
|
|
|
Byte offset at which the stream starts, defaults to 0. The start is inclusive,
|
|
meaning `start: 2` will include the 3rd byte in the stream.
|
|
|
|
#### Events
|
|
|
|
The `SendStream` is an event emitter and will emit the following events:
|
|
|
|
- `error` an error occurred `(err)`
|
|
- `directory` a directory was requested `(res, path)`
|
|
- `file` a file was requested `(path, stat)`
|
|
- `headers` the headers are about to be set on a file `(res, path, stat)`
|
|
- `stream` file streaming has started `(stream)`
|
|
- `end` streaming has completed
|
|
|
|
#### .pipe
|
|
|
|
The `pipe` method is used to pipe the response into the Node.js HTTP response
|
|
object, typically `send(req, path, options).pipe(res)`.
|
|
|
|
### .mime
|
|
|
|
The `mime` export is the global instance of of the
|
|
[`mime` npm module](https://www.npmjs.com/package/mime).
|
|
|
|
This is used to configure the MIME types that are associated with file extensions
|
|
as well as other options for how to resolve the MIME type of a file (like the
|
|
default type to use for an unknown file extension).
|
|
|
|
## Error-handling
|
|
|
|
By default when no `error` listeners are present an automatic response will be
|
|
made, otherwise you have full control over the response, aka you may show a 5xx
|
|
page etc.
|
|
|
|
## Caching
|
|
|
|
It does _not_ perform internal caching, you should use a reverse proxy cache
|
|
such as Varnish for this, or those fancy things called CDNs. If your
|
|
application is small enough that it would benefit from single-node memory
|
|
caching, it's small enough that it does not need caching at all ;).
|
|
|
|
## Debugging
|
|
|
|
To enable `debug()` instrumentation output export __DEBUG__:
|
|
|
|
```
|
|
$ DEBUG=send node app
|
|
```
|
|
|
|
## Running tests
|
|
|
|
```
|
|
$ npm install
|
|
$ npm test
|
|
```
|
|
|
|
## Examples
|
|
|
|
### Small example
|
|
|
|
```js
|
|
var http = require('http')
|
|
var parseUrl = require('parseurl')
|
|
var send = require('send')
|
|
|
|
var server = http.createServer(function onRequest (req, res) {
|
|
send(req, parseUrl(req).pathname).pipe(res)
|
|
})
|
|
|
|
server.listen(3000)
|
|
```
|
|
|
|
### Custom file types
|
|
|
|
```js
|
|
var http = require('http')
|
|
var parseUrl = require('parseurl')
|
|
var send = require('send')
|
|
|
|
// Default unknown types to text/plain
|
|
send.mime.default_type = 'text/plain'
|
|
|
|
// Add a custom type
|
|
send.mime.define({
|
|
'application/x-my-type': ['x-mt', 'x-mtt']
|
|
})
|
|
|
|
var server = http.createServer(function onRequest (req, res) {
|
|
send(req, parseUrl(req).pathname).pipe(res)
|
|
})
|
|
|
|
server.listen(3000)
|
|
```
|
|
|
|
### Custom directory index view
|
|
|
|
This is a example of serving up a structure of directories with a
|
|
custom function to render a listing of a directory.
|
|
|
|
```js
|
|
var http = require('http')
|
|
var fs = require('fs')
|
|
var parseUrl = require('parseurl')
|
|
var send = require('send')
|
|
|
|
// Transfer arbitrary files from within /www/example.com/public/*
|
|
// with a custom handler for directory listing
|
|
var server = http.createServer(function onRequest (req, res) {
|
|
send(req, parseUrl(req).pathname, {index: false, root: '/www/example.com/public'})
|
|
.once('directory', directory)
|
|
.pipe(res)
|
|
})
|
|
|
|
server.listen(3000)
|
|
|
|
// Custom directory handler
|
|
function directory (res, path) {
|
|
var stream = this
|
|
|
|
// redirect to trailing slash for consistent url
|
|
if (!stream.hasTrailingSlash()) {
|
|
return stream.redirect(path)
|
|
}
|
|
|
|
// get directory list
|
|
fs.readdir(path, function onReaddir (err, list) {
|
|
if (err) return stream.error(err)
|
|
|
|
// render an index for the directory
|
|
res.setHeader('Content-Type', 'text/plain; charset=UTF-8')
|
|
res.end(list.join('\n') + '\n')
|
|
})
|
|
}
|
|
```
|
|
|
|
### Serving from a root directory with custom error-handling
|
|
|
|
```js
|
|
var http = require('http')
|
|
var parseUrl = require('parseurl')
|
|
var send = require('send')
|
|
|
|
var server = http.createServer(function onRequest (req, res) {
|
|
// your custom error-handling logic:
|
|
function error (err) {
|
|
res.statusCode = err.status || 500
|
|
res.end(err.message)
|
|
}
|
|
|
|
// your custom headers
|
|
function headers (res, path, stat) {
|
|
// serve all files for download
|
|
res.setHeader('Content-Disposition', 'attachment')
|
|
}
|
|
|
|
// your custom directory handling logic:
|
|
function redirect () {
|
|
res.statusCode = 301
|
|
res.setHeader('Location', req.url + '/')
|
|
res.end('Redirecting to ' + req.url + '/')
|
|
}
|
|
|
|
// transfer arbitrary files from within
|
|
// /www/example.com/public/*
|
|
send(req, parseUrl(req).pathname, {root: '/www/example.com/public'})
|
|
.on('error', error)
|
|
.on('directory', redirect)
|
|
.on('headers', headers)
|
|
.pipe(res)
|
|
})
|
|
|
|
server.listen(3000)
|
|
```
|
|
|
|
## License
|
|
|
|
[MIT](LICENSE)
|
|
|
|
[npm-image]: https://img.shields.io/npm/v/send.svg
|
|
[npm-url]: https://npmjs.org/package/send
|
|
[travis-image]: https://img.shields.io/travis/pillarjs/send/master.svg?label=linux
|
|
[travis-url]: https://travis-ci.org/pillarjs/send
|
|
[appveyor-image]: https://img.shields.io/appveyor/ci/dougwilson/send/master.svg?label=windows
|
|
[appveyor-url]: https://ci.appveyor.com/project/dougwilson/send
|
|
[coveralls-image]: https://img.shields.io/coveralls/pillarjs/send/master.svg
|
|
[coveralls-url]: https://coveralls.io/r/pillarjs/send?branch=master
|
|
[downloads-image]: https://img.shields.io/npm/dm/send.svg
|
|
[downloads-url]: https://npmjs.org/package/send
|