express-webapp-assets

express-webapp-assets

한글

Webapp Assets(static web resources) Middleware/Server/Generator for [Express].

express-webapp-assets is a development tool to develop single page/front-end webapp using preprocessors.

For practical example, see express-webapp-assets-seed

introduction

• It is NOT a server application.

• It is a development tool with built-in http server.

• In development phase,

  • It works as an embedded middleware for local API server written in [Express]/[Node.js].
  • or It works as a sepratated simple http server for external API server written in other frameworks/languages.

• In deployment phase:

  • It generates static files for all assets written in preprocessors.
  • And the generated files could be served with high-performance static-content http servers.
  • No annoying changes and/or verbose deploy script to switch development/production assets.

In the other words, it does copy, filter(render/compile/.../whatever), bundle(merge) and compress assets for you just in time or in batch.

For example, it does these tasks instead of you(or your [grunt]/[gulp] script):

$ less foo.less > foo.css
$ cssmin foo.css > foo.min.css
$ less bar.less > bar.css
$ cssmin bar.css > bar.min.css
$ coffee-script baz.coffee > bar.js
$ uglify-js baz.js > bar.min.js
$ coffee-script qux.coffee > qux.js
$ uglify-js qux.js > qux.min.js
$ cat foo.css bar.css > all.css
$ cssmin all.css > all.min.css
$ cat baz.js qux.js > all.js
$ uglify-js all.js > all.min.js

and replace

<link rel="stylesheet" href="foo.css" />
<link rel="stylesheet" href="bar.css" />
<script src="baz.js"></script>
<script src="qux.js"></script>

into

<link rel="stylesheet" href="all.min.css" />
<script src="all.min.js"></script>

usage

middleware

To develop webapp working with local API server written in [Express]/[Node.js].

install node.js module:

$ npm install express-webapp-assets --save-dev

configure middleware:

express()
    ...
    .use('/assets', require('express-webapp-assets')({src:'public/assets', ... configurations ... }))
    .use('/api/v1', ... your api routes ...)
    ...

NOTE: this is NOT intended for production use. use generator and deploy to your static-content http servers.

server

To develop webapp working with external API server written in other frameworks/languages.

install node.js module global(or local if you want):

$ npm install express-webapp-assets -g

run server, use --server or -S CLI option:

$ express-webapp-asset --server

NOTE: this is NOT intended for production use. use generator and deploy to your static-content http servers.

generator

It generates static files for all assets written in preprocessors.

And the generated files could be served with high-performance static-content http servers.

No annoying modifications and/or verbose deploy script to switch development/production assets.

install node.js module in global(or local if you want):

$ npm install express-webapp-assets -g

run generator, use --generator or -G CLI option:

$ express-webapp-assets --generator --env=production

configurations

Configurations could be a ./_assets.json file or a _asset property in package.json:

{
  host: 'localhost', // server mode only
  port: 3000, // server mode only
  root: 'public', // server mode only
  mount: '/', // server mode only
  src: 'public',
  dst: '/build/public',
  helpers: { }, // passed to preprocessors
  filters: { }, // custom filters
  env: 'development'  // 'development', 'staging', 'production' or else
}

To specify configuration file, use --config or -C CLI option:

$ express-webapp-asset --config=asset_config.json

resolving assets

1. find with base name and extension.
   • foo.js or foo.min.js resolved to foo.js file.
2. find with .bundle extension.
   • foo.js or foo.min.js resolved to foo.js.bundle file.
   • foo.css or foo.min.css resolved to foo.css.bundle file.
   • a bundle file is references other assets(not files) line by line
   • all assets in a bundle file are resolved(RECURSIVE) and merged into a single file.
3. find with with preprocessor specific extension.
   • foo.html resolved to foo.html.jade
   • foo.css or foo.min.css resolved to foo.js.less
   • foo.js or foo.min.js resolved to foo.js.coffee
4. compress it if asset name contains infix .min and compressable format(js, css).
5. otherwise, find in includes directories.
   • above procedures(bundle/filter/compress) are NOT applied.

for example,

• asset SRC/test.html or SRC/test.html.jade

...
link(rel="stylesheet",href="foo.css")
link(rel="stylesheet",href="bar.min.css")
link(rel="stylesheet",href="bootstrap-all.min.css")
script(src="baz.js")
script(src="qux.min.s")
script(src="bootstrap-all.min.js")

• will generate/serve DST/test.html

<link rel="stylesheet" href="foo.css" />
<link rel="stylesheet" href="bar.min.css" />
<link rel="stylesheet" href="bootstrap-all.min.css" />
<script src="baz.js"></script>
<script src="qux.min.js"></script>
<script src="bootstrap-all.min.js"></script>

• asset SRC/bootstrap-all.js.bundle

# all bootstrap scripts
jquery/dist/jquery.min.js
bootstrap/dist/js/bootstrap.min.js

• will generate/serve DST/boostrap-all.js and DST/bootstrap-all.min.js

• asset SRC/bootstrap-all.css.bundle

# all bootstrap styles
bootstrap/dist/css/bootstrap.min.css
bootstrap/dist/css/bootstrap-theme.min.css

• will generate/serve DST/bootstrap-all.css and DST/bootstrap-all.min.css

• asset SRC/foo.css or SRC/foo.css.less will generate/serve DST/foo.css and DST/foo.min.css.

• asset SRC/bar.css or SRC/bar.css.less will generate/serve DST/bar.css and DST/bar.min.css.

• asset SRC/baz.js or SRC/baz.js.coffee will generate/serve DST/baz.css and DST/baz.min.css.

• asset SRC/qux.js or SRC/qux.js.coffee will generate/serve DST/qux.css and DST/qux.min.css.

• and so on...

helpers

There are helpers for preprocessors.

js

for example, there are test.js.bundle

foo.coffee.js
bar.js

and test.html.jade using test.min.js(or test.js):

html
  head
    !=js('test.min.js')

in 'development' env, it generates/serves test.html, foo.js and bar.js:

<html>
  <head>
    <script src="foo.js"></script>
    <script src="bar.js"></script>

but in NOT 'development' env, it generates/serves test.html and test.min.js(or test.js):

<html>
  <head>
    <script src="test.min.js"></script>

css

for example, there are test.css.bundle

foo.less.css
bar.css

and test.html.jade using test.min.css(or test.css):

html
  head
    !=css('test.min.css')

in 'development' env, it generates/serves test.html and foo.css and bar.css:

<html>
  <head>
    <link rel="stylesheet" href="foo.css" />
    <link rel="stylesheet" href="bar.css" />

but in NOT 'development' env, it generates/serves test.html test.min.css(or test.css):

<html>
  <head>
    <link rel="stylesheet" href="test.min.css" />

preprocessors

• html
  • jade
  • TODO: ejs
  • TODO: mustache
  • [report issue] or [pull request] ;)
• css
  • cssmin for *.min.css
  • less
  • TODO: sass
  • TODO: compass
  • TODO: stylus
  • [report issue] or [pull request] ;)
• js
  • uglifyjs for *.min.js
  • coffee
  • TODO: typescript
  • TODO: dart
  • [report issue] or [pull request] ;)
• others
  • [report issue] or [pull request] ;)

static-content http servers

• package
  • Apache - FOSS, fast and stable
  • Nginx - FOSS, very fast and stable
  • Cherokee - FOSS, very very fast
  • G-WAN - Commercial but extremely fast
  • ...
• cloud
  • GitHub Pages
  • Amazon S3
  • ...

may the SOURCE be with you...