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https://github.com/fastify/fast-proxy
Node.js framework agnostic library that enables you to forward an http request to another HTTP server. Supported protocols: HTTP, HTTPS, HTTP2
https://github.com/fastify/fast-proxy
api fastify-library gateway http javascript js nodejs proxy rest server
Last synced: about 2 months ago
JSON representation
Node.js framework agnostic library that enables you to forward an http request to another HTTP server. Supported protocols: HTTP, HTTPS, HTTP2
- Host: GitHub
- URL: https://github.com/fastify/fast-proxy
- Owner: fastify
- License: mit
- Archived: true
- Created: 2019-06-04T04:53:21.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2024-01-29T20:24:24.000Z (11 months ago)
- Last Synced: 2024-09-28T11:20:58.732Z (3 months ago)
- Topics: api, fastify-library, gateway, http, javascript, js, nodejs, proxy, rest, server
- Language: JavaScript
- Homepage: https://www.npmjs.com/package/fast-proxy
- Size: 269 KB
- Stars: 162
- Watchers: 11
- Forks: 30
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- cuban-opensource - fast-proxy
- awesome-nodejs - fast-proxy - Node.js framework agnostic library that enables you to forward an http request to another HTTP server. Supported protocols: HTTP, HTTPS, HTTP2.  (Repository / HTTP)
README
# fast-proxy
[](https://www.npmjs.com/package/fast-proxy)
Node.js framework agnostic library that enables you to forward an http request to another HTTP server.
Supported protocols: HTTP, HTTPS, HTTP2
> This library was initially forked from `fastify-reply-from`: https://github.com/fastify/fastify-reply-from
`fast-proxy` powers: https://www.npmjs.com/package/fast-gateway 🚀
## Install
```
npm i fast-proxy
```
## Usage
The following examples describe how to use `fast-proxy` with `restana`:
Gateway:
```js
const { proxy, close } = require('fast-proxy')({
base: 'http://127.0.0.1:3000'
// options
})
const gateway = require('restana')()
gateway.all('/service/*', function (req, res) {
proxy(req, res, req.url, {})
})
gateway.start(8080)
```
Remote service:
```js
const service = require('restana')()
service.get('/service/hi', (req, res) => res.send('Hello World!'))
service.start(3000)
```
Using imports:
```ts
import fastProxy from 'fast-proxy'
const { proxy, close } = fastProxy({
base: 'http://127.0.0.1:3000'
})
```
## Benchmarks
Please see: https://github.com/jkyberneees/nodejs-proxy-benchmarks
## API
### Options
#### `base`
Set the base URL for all the forwarded requests. Will be required if `http2` is set to `true`
Note that _path will be discarded_.
#### queryString
Set the query string parser and stringifier. By default `fast-proxy` uses the
[fast-querystring](https://npmjs.com/package/fast-querystring) module. Configuration can be changed like so:
```js
{
base: 'http://localhost:3001/',
queryString: {
parse: (value) => qs.parse(value),
stringify: (value) => qs.stringify(value),
}
}
```
#### http2
Set to `true` if target server is `http2` enabled.
#### undici
Set to `true` to use [undici](https://github.com/mcollina/undici)
instead of `require('node:http')`. Enabling this flag should guarantee
20-50% more throughput.
This flag could controls the settings of the undici client, like so:
```js
...
base: 'http://localhost:3001/',
undici: {
connections: 100,
pipelining: 10
}
...
```
> See undici demo at: `demos/gateway-undici.js`
#### cacheURLs
The number of parsed URLs that will be cached. Default: 100.
> Use value = `0` to disable the caching mechanism
#### requests.http and requests.https
Allows to optionally overwrite the internal `http` and `https` client agents implementation. Defaults: [`http`](https://nodejs.org/api/http.html#http_http) and [`https`](https://nodejs.org/api/https.html#https_https).
For example, this could be used to add support for following redirects, like so:
```js
...
requests: {
http: require('follow-redirects/http'),
https: require('follow-redirects/https')
}
...
```
> If using `undici` or `http2` this settings are ignored!
#### keepAliveMsecs
Defaults to 1 minute, passed down to [`http.Agent`][http-agent] and
[`https.Agent`][https-agent] instances.
#### maxSockets
Defaults to 2048 sockets, passed down to [`http.Agent`][http-agent] and
[`https.Agent`][https-agent] instances.
#### rejectUnauthorized
Defaults to `true`, passed down to [`https.Agent`][https-agent] instances.
This needs to be set to `false` to reply from https servers with
self-signed certificates.
#### Extended configurations
Other supported configurations in https://nodejs.org/api/http.html#http_new_agent_options can also be part of the `opts` object.
### close
Optional _"on `close` resource release"_ strategy. You can link this to your application shutdown hook as an example.
### proxy(originReq, originRes, source, [opts])
Enables you to forward an http request to another HTTP server.
```js
proxy(
originReq, // http.IncomingMessage
originRes, // http.ServerResponse
req.url, // String -> remote URL + path or path if base was set
{} // Options described below
)
```
#### opts
##### base
Optionally indicates the base URL for the current request proxy. When used, the global `base` config is overwriten.
> This configuration value is ignored when using HTTP2.
##### onResponse(req, res, stream)
Called when an http response is received from the source.
The default behavior is `pump(stream, res)`, which will be disabled if the
option is specified.
##### rewriteRequestHeaders(req, headers)
Called to rewrite the headers of the request, before them being sent to the downstream server.
It must return the new headers object.
##### rewriteHeaders(headers)
Called to rewrite the headers of the response, before them being copied
over to the outer response.
It must return the new headers object.
##### request
Extended options supported by `http[s].request` method (https://nodejs.org/api/http.html#http_http_request_options_callback)
The following options are dynamically assigned: `method, port, path, hostname, headers, agent`.
> `http2` options are limited to `timeout` only, while `undici` supports none.
##### queryString
Replaces the original querystring of the request with what is specified.
This will get passed to
[`querystring.stringify`](https://nodejs.org/api/querystring.html#querystring_querystring_stringify_obj_sep_eq_options).
## Related topics
- http-agent: https://nodejs.org/api/http.html#http_new_agent_options
- https-agent: https://nodejs.org/api/https.html#https_class_https_agent
## Contributions
Special thanks to `fastify-reply-from` developers for creating a production ready library from where we could initially fork.
## License
MIT