https://github.com/ad-si/image-resize-middleware

Image resizing middleware
https://github.com/ad-si/image-resize-middleware

express expressjs graphicsmagick middleware

Last synced: 20 days ago
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Image resizing middleware

• Host: GitHub
• URL: https://github.com/ad-si/image-resize-middleware
• Owner: ad-si
• Created: 2015-08-17T20:49:06.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2016-01-09T20:33:04.000Z (almost 9 years ago)
• Last Synced: 2024-10-12T13:51:54.045Z (about 1 month ago)
• Topics: express, expressjs, graphicsmagick, middleware
• Language: JavaScript
• Homepage:
• Size: 16.6 KB
• Stars: 4
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

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README

        
# Image Resizer

GraphicsMagick powered, multi threaded image resizing middleware.

## Installation

```sh

npm install --save image-resize-middleware

```

## Usage

```js

const path = require('path')

const express = require('express')

const imageResizer = require('image-resize-middleware')

const port = 3000

const publicDirectory = path.join(__dirname, 'public')

const app = express()

app.use(imageResizer.getMiddleware({

	basePath: path.join(publicDirectory, 'images'),

	thumbnailsPath: path.join(publicDirectory, 'thumbnails'),

}))

app.use(express.static(publicDirectory))

app.listen(

	port,

	() => console.log('Listening on http://localhost:' + port)

)

```

Every request for an image at `/images///`

which also contains a width, height, max-width or max-height query parameter

will be scaled to the specified value.

For example a request for

`http://localhost:3000/images/test.png?max-width=50&max-height=50`

triggers the creation of a proportionally scaled thumbnail

with a maximum bounding box of 50px by 50px.

It is saved at `$(pwd)/public/thumbnails/test_50x50>.png`

and responded to the request.

## Algorithm

All images to be scaled are added to a queue.

The queue is worked off with one worker per core.