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Sharp High performance Node.js image processing library.
It is 4x to 5x faster then ImageMagick and GraphicsMagick.
We can convert any larger image to any common format such as png, gif, jpeg, webp.
Also we can modify image dimension on the go without modifying actual image.
Any systems running Node.js v10+ do not need any additional install or runtime dependencies.
to install sharp run the following command to your terminal
npm install sharp
first we have to import sharp class using
import sharp from 'sharp';
Now we will make s3 helper file to retrieve the file from aws s3.
to install aws sdk to your node js application run the following command
npm install aws-sdk
in class constructor we will add following code
our s3 class constructor is successfully configured. now we will add a function to retrieve file from s3.
we will use the below code as follows
complete code of S3Helper class will be like this
Sharp image resize
Lets say we have a image file stored in s3, key name of that file is nature.png.
Actual size of the image is 1024x600. we want to convert to 200x200 size.
to define image quality, we can pass the quality value from 0 to 100 to sharp object. we will define the quality into a variable
let quality = 100;
now we will fetch file from s3 using below code. Don't forget to load s3 helper class into your code.
let file: any = await this.s3Helper.getFile(key);
final part to convert image to our desired size, we can use below code to do this.
now console.log(data.toString('base64')), you will get converted image in base64 format.
if you want to save that file to disk, use below code
To know more please refer the following url https://github.com/lovell/sharp
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