[](https://www.npmjs.org/package/local-web-server)
[](https://www.npmjs.org/package/local-web-server)
[](https://travis-ci.org/75lb/local-web-server)
[](https://david-dm.org/75lb/local-web-server)
[](https://github.com/feross/standard)
***This is the documentation for the next version. For the previous release, see the `prev` branch. To install this prerelease: `$ npm i -g local-web-server@^1.0.0-beta`***
# local-web-server
A simple web-server for productive front-end development. Typical use cases:
* Front-end Development
* Static or Single Page App development
* reroute paths to local or remote resources
* Bundle with your front-end project
* Very little configuration, just a few options
* Outputs a dynamic statistics view to the terminal
* Configurable log output, compatible with [Goaccess, Logstalgia and glTail](https://github.com/75lb/local-web-server/blob/master/doc/visualisation.md)
* Back-end service mocking
* Prototype a web service, microservice, REST API etc.
* CORS-friendly, all origins allowed by default.
* Proxy server
* Useful to workaround CORS issues with remote servers
* File sharing
**Requires node v4.0.0 or higher**.
## Synopsis
local-web-server is a simple command-line tool. To use it, from your project directory run `ws`.
$ ws --help
local-web-server
A simple web-server for productive front-end development.
Synopsis
$ ws [\]
$ ws --config
$ ws --help
Server
-p, --port number Web server port.
-d, --directory path Root directory, defaults to the current directory.
-f, --log-format string If a format is supplied an access log is written to stdout. If
not, a dynamic statistics view is displayed. Use a preset ('none',
'dev','combined', 'short', 'tiny' or 'logstalgia') or supply a
custom format (e.g. ':method -> :url').
-r, --rewrite expression ... A list of URL rewrite rules. For each rule, separate the 'from'
and 'to' routes with '->'. Whitespace surrounded the routes is
ignored. E.g. '/from -> /to'.
-s, --spa file Path to a Single Page App, e.g. app.html.
-c, --compress Serve gzip-compressed resources, where applicable.
-b, --forbid path ... A list of forbidden routes.
-n, --no-cache Disable etag-based caching -forces loading from disk each request.
--verbose Verbose output, useful for debugging.
Misc
-h, --help Print these usage instructions.
--config Print the stored config.
Project home: https://github.com/75lb/local-web-server
## Examples
For the examples below, we assume we're in a project directory looking like this:
```sh
.
├── css
│ └── style.css
├── index.html
└── package.json
```
All paths/routes are specified using [express syntax](http://expressjs.com/guide/routing.html#route-paths). To run the example projects linked below, clone the project, move into the example directory specified, run `ws`.
### Static site
Fire up your static site on the default port:
```sh
$ ws
serving at http://localhost:8000
```
[Example](https://github.com/75lb/local-web-server/tree/master/example/simple).
### Single Page Application
You're building a web app with client-side routing, so mark `index.html` as the SPA.
```sh
$ ws --spa index.html
```
By default, typical SPA urls (e.g. `/user/1`, `/login`) would return `404 Not Found` as a file does not exist with that path. By marking `index.html` as the SPA you create this rule:
*If a static file at the requested path exists (e.g. `/css/style.css`) then serve it, if it does not (e.g. `/login`) then serve the specified SPA and handle the route client-side.*
[Example](https://github.com/75lb/local-web-server/tree/master/example/spa).
### URL rewriting
Your application requested `/css/style.css` but it's stored at `/build/css/style.css`. To avoid a 404 you need a rewrite rule:
```sh
$ ws --rewrite '/css/style.css -> /build/css/style.css'
```
Or, more generally (matching any stylesheet under `/css`):
```sh
$ ws --rewrite '/css/:stylesheet -> /build/css/:stylesheet'
```
With a deep CSS directory structure it may be easier to mount the entire contents of `/build/css` to the `/css` path:
```sh
$ ws --rewrite '/css/* -> /build/css/$1'
```
this rewrites `/css/a` as `/build/css/a`, `/css/a/b/c` as `/build/css/a/b/c` etc.
#### Proxied requests
If the `to` URL contains a remote host, local-web-server will act as a proxy - fetching and responding with the remote resource.
Mount the npm registry locally:
```sh
$ ws --rewrite '/npm/* -> http://registry.npmjs.org/$1'
```
Map local requests for repo data to the Github API:
```sh
$ ws --rewrite '/:user/repos/:name -> https://api.github.com/repos/:user/:name'
```
[Example](https://github.com/75lb/local-web-server/tree/master/example/rewrite).
### Mock Responses
Mock a data service, serve any custom/dynamic content.
A mock definition maps a route to a response. Mock a home page.
```json
{
"mocks": [
{
"route": "/",
"response": {
"body": "Welcome to the Mock Responses example
"
}
}
]
}
```
Conditional response, depending on the request.
```json
{
"mocks": [
{
"route": "/two",
"request": { "accepts": "xml" },
"response": {
"body": ""
}
}
]
}
```
Multiple potential responses. First request to match.
```json
{
"mocks": [
{
"route": "/three",
"responses": [
{
"request": { "method": "GET" },
"response": {
"body": "Mock response for 'GET' request on /three
"
}
},
{
"request": { "method": "POST" },
"response": {
"status": 400,
"body": { "message": "That method is not allowed." }
}
}
]
}
]
}
```
More dynamic response.
```json
{
"mocks": [
{
"route": "/four",
"module": "/mocks/four.js"
}
]
}
```
Tokens in the route are passed to the response.
```json
{
"mocks": [
{
"route": "/five/:id\\?name=:name",
"module": "/mocks/five.js"
}
]
}
```
[Example](https://github.com/75lb/local-web-server/tree/master/example/mock).
### Stored config
Use the same port and blacklist every time? Persist it to `package.json`:
```json
{
"name": "example",
"version": "1.0.0",
"local-web-server": {
"port": 8100,
"forbid": "*.json"
}
}
```
or `.local-web-server.json`
```json
{
"port": 8100,
"forbid": "*.json"
}
```
local-web-server will merge and use all config found, searching from the current directory upward. In the case both `package.json` and `.local-web-server.json` config is found in the same directory, `.local-web-server.json` will take precedence. Command-line options take precedence over all.
To inspect stored config, run:
```sh
$ ws --config
```
### Logging
By default, local-web-server outputs a simple, dynamic statistics view. To see traditional web server logs, use `--log-format`:
```sh
$ ws --log-format combined
serving at http://localhost:8000
::1 - - [16/Nov/2015:11:16:52 +0000] "GET / HTTP/1.1" 200 12290 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2562.0 Safari/537.36"
```
The format value supplied is passed directly to [morgan](https://github.com/expressjs/morgan). The exception is `--log-format none` which disables all output.
### Access Control
By default, access to all files is allowed (including dot files). Use `--forbid` to establish a blacklist:
```sh
$ ws --forbid '*.json' '*.yml'
serving at http://localhost:8000
```
[Example](https://github.com/75lb/local-web-server/tree/master/example/forbid).
### Other usage
#### Debugging
Prints information about loaded middleware, arguments, remote proxy fetches etc.
```sh
$ ws --verbose
```
#### Compression
Serve gzip-compressed resources, where applicable
```sh
$ ws --compress
```
#### Disable caching
Disable etag response headers, forcing resources to be served in full every time.
```sh
$ ws --no-cache
```
#### mime-types
You can set additional mime-type/extension mappings, or override the defaults by setting a `mime` value in the stored config. This value is passed directly to [mime.define()](https://github.com/broofa/node-mime#mimedefine). Example:
```json
{
"mime": {
"text/plain": [ "php", "pl" ]
}
}
```
[Example](https://github.com/75lb/local-web-server/tree/master/example/mime-override).
#### Log Visualisation
Instructions for how to visualise log output using goaccess, logstalgia or gltail [here](https://github.com/75lb/local-web-server/blob/master/doc/visualisation.md).
## Install
Ensure [node.js](http://nodejs.org) is installed first. Linux/Mac users may need to run the following commands with `sudo`.
```sh
$ npm install -g local-web-server
```
This will install the `ws` tool globally. To see the available options, run:
```sh
$ ws --help
```
## Distribute with your project
The standard convention with client-server applications is to add an `npm start` command to launch the server component.
1\. Install the server as a dev dependency
```sh
$ npm install local-web-server --save-dev
```
2\. Add a `start` command to your `package.json`:
```json
{
"name": "example",
"version": "1.0.0",
"local-web-server": {
"port": 8100,
"forbid": "*.json"
},
"scripts": {
"start": "ws"
}
}
```
3\. Document how to build and launch your site
```sh
$ npm install
$ npm start
serving at http://localhost:8100
```
## API Reference
{{#module name="local-web-server"}}
{{>body~}}
{{>member-index~}}
{{>separator~}}
{{>members~}}
{{/module}}
* * *
© 2015 Lloyd Brookes <75pound@gmail.com>. Documented by [jsdoc-to-markdown](https://github.com/jsdoc2md/jsdoc-to-markdown).