gulp-useref-cdn


> Parse build blocks in HTML files to replace references and automatically upload to qiniu cdn.

Inspired by grunt-useref and gulp-useref. It can handle file concatenation but not minification. And it can upload the concatenated file to cdn automatically. Files are then passed down the stream. For minification of assets or other modifications, use gulp-if to conditionally handle specific types of assets.

Note: lot of code from gulp-useref. gulp-useref doesn't apply a way to manage html file analysis or a callback after html file analysis. This is why I don't make gulp-useref as lib dependency and rewrite based on it.

Install

Install with npm

``
npm install --save-dev gulp-useref-cdn
`

Usage

The following example will parse the build blocks in the HTML, replace them, upload to cdn, and pass those files through. Assets inside the build blocks will be concatenated and passed through in a stream as well.

`js
var gulp = require('gulp'),
useref = require('gulp-useref-cdn');

gulp.task('default', function () {
var assets = useref.assets();

return gulp.src('app/*.html')
.pipe(assets)
.pipe(assets.restore())
.pipe(useref())
.pipe(gulp.dest('dist'));
});
`

More details: . All gulp-useref's syntax and usage are supported by gulp-useref-cdn.

What's important here is that an extended syntax/usage is added!


`html

`

Before, type could be either js, css or remove. And the new cdn is added now.

When you use cdn as the type, no need to write js or css anymore. The plugin will detect it automatically, and it will do the work as expected when you use js|css.

And with the cdn type, the plugin will upload the concatenated file to qiniu cdn.

An example of this in completed form can be seen below:

`html














`

`js
import cdn from 'gulp-useref-cdn';
let assets = cdn.assets({
accessKey: 'ACCESS_KEY',
secretKey: 'SECRET_KEY',
domain: 'DOMAIN',
bucket: 'BUCKET', // could be replaced if you rewrite at html
keyPrefix: ''
});

gulp.src('test/fixtures/cdn.html')
.pipe(assets)
.on('error', (err) => {
done(err);
})
.pipe(assets.restore())
.pipe(cdn())
.pipe(gulp.dest('dist'));
`


The resulting HTML would be:

`html








`

And you will see combined-ce2a0c47.js and combined-f9ebd308.css in your qiniu cdn's bucket.

API

$3

Returns a stream with the asset replaced resulting HTML files. Supports all options from useref.

$3

Returns a stream with the concatenated asset files from the build blocks inside the HTML.

#### options.searchPath

Type: String or Array
Default: none

Specify the location to search for asset files, relative to the current working directory. Can be a string or array of strings.

#### options.noconcat

Type: Boolean
Default: false

Skip concatenation and add all assets to the stream instead.

#### options.silent

Type: Boolean
Default: true

Set to false if you want to see messages except error.

#### options.md5

Type: Number
Default: 8

#### options.keyPrefix

Type: String
Default: gulp-useref-cdn/

The above two are all about key. Key is defined by Qiniu. Key can be set clearly via in comment.

When key is not offered, plugin will generate the key:

`js
prefix + filename + '-' + md5 + '.' + filetype;
`

- prefix --- options.keyPrefix
- md5 --- the md5 string of the file, options.md5 specify md5's length(after cut).
- filename, filetype` are offered by plugin.

$3

Brings back the previously filtered out HTML files.

License

Copyright (c) 2015 creeperyang. Licensed under the MIT license.