multer-s3-transform still available?

[btmdave]

Is his project still available? Seems to route here, not sure if there's a new way to transform buffer prior to sending to s3?

[b0rgbart3]

I've been trying to do this too. Multer-Imager (https://github.com/Alexandre-io/multer-imager ) allows you to include Graphics Magick Options -- but so far I've only been able to change the width and height of the image -but I can't get cropping or any of the other Graphics Magick tricks to work with it.

[btmdave]

Yeah, for that one they are explicitly defining resize, looks like that's only option. For this, I ended up just using multer, then doing what transforms i needed and using aws sdk directly to upload.

[b0rgbart3]

How are you doing the transforms? Using GM (graphics magick) - or using the AWS SDK?

I actually forked multer-imager - and added a call to gm.crop -- after their call to gm.resize -- which actually works nicely - except I've still been having a hard time finding decent documentation on GM itself. (I didn't have much luck with the AWS SDK documentation either though...)

-- Multer-imager has a _handleFile method on the S3Storage prototype that makes the file available as a stream -so that you can pipe it to gm. This is the code I added to check if you've included cropping parameters in the options object:

var outStream = self.s3fs.createWriteStream(filePath, s3options);

    if (self.options.crop.width && self.options.gm.crop.height) {
      gm(file.stream)
      .crop(self.options.gm.crop.width, self.options.gm.crop.height, self.options.gm.crop.x, self.options.gm.crop.y)
      .stream(self.options.gm.format || DEFAULT_FORMAT)
      .pipe(outStream);
    } 

  if ( self.options.gm.width && self.options.gm.height) {
      gm(file.stream)
      .crop(self.options.gm.crop.width, self.options.gm.crop.height, self.options.gm.crop.x, self.options.gm.crop.y)
      .stream(self.options.gm.format || DEFAULT_FORMAT)
      .pipe(outStream); }

The problem with this approach (my code) however is that it doesn't allow you to change the sequence of the gm pipes -- (since gm was written originally as a CLI tool - it's built around the idea of arrange the pipes in various sequences to accomplish complex tasks). Also - it requires you to know what the dimensions are that you're wanting to crop -- which isn't very useful because each image you upload will have different dimensions.

I'm very curious to know more about your solution, btmdave. Thanks!

[lschwe]

you gotta use this npm install multer-s3-transform

[ranihorev]

Hey, I submitted a PR that supports transformations. You can find the code here in the meantime: https://github.com/ranihorev/multer-s3

[LinusU]

I would recommend using Multer 3.x if you need this...

Closing due to inactivity...