I'm using this Node ImageMagick for validating images via converting them in AWS Lambda function. Locally I have no problem, but when I deploy my function I get the error no decode delegate for this image format
on some images only :
{ Error: Command failed: convert: no decode delegate for this image format `/tmp/925bf249f8297827f51f0370642eb560.jpg' @ error/constitute.c/ReadImage/544.
convert: no images defined `/tmp/5d2baeb2-de13-4868-a970-ad919c609440.png' @ error/convert.c/ConvertImageCommand/3046.
at ChildProcess.<anonymous>
(/var/task/node_modules/imagemagick/imagemagick.js:88:15)
at emitTwo (events.js:106:13)
at ChildProcess.emit (events.js:191:7)
at maybeClose (internal/child_process.js:886:16)
at Socket.<anonymous> (internal/child_process.js:342:11)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at Pipe._handle.close [as _onclose] (net.js:497:12) timedOut: false, killed: false, code: 1, signal: null }
This is after I failed to use ImageMagick that's built-in for AWS Lambda. Any idea how I can solve this?
Finally I figured it out! There is no short way for this. This is what I ended up doing:
I ran Parallel
on my Mac and I got the binaries of ImageMagick
installed on a virtual CentOS
machine. To install the binaries I followed the guides in the official website . I wrote a lot of commands in my virtual machine but I can summarise them in:
yum install sudo -y sudo yum -y install libpng-devel libjpeg-devel libtiff-devel gcc sudo curl -O http://www.imagemagick.org/download/ImageMagick.tar.gz sudo yum install tar -y sudo tar zxvf ImageMagick.tar.gz cd ImageMagick-7.0.8-22 sudo ./configure --prefix=/var/task/imagemagick --enable-shared=no --enable-static=yes sudo yum install make -y sudo yum install automake autoconf libtool -y sudo sed -i 's|(gitversion|(./gitversion|' configure.ac sudo yum install git -y sudo autoreconf -i sudo sed -i '$a LANG=en_US.utf-8' /etc/environment sudo sed -i '$a LC_ALL=en_US.utf-8' /etc/environment sudo make sudo make install tar zcvf ~/imagemagick.tgz /var/task/imagemagick/`
Then I copied the installation folder from the virtual machine into a folder I named /lib
in my root directory of AWS Lambda repository.
Then in order to use the new binaries, I needed to copy ImageMagick
folder from /lib
into my node_modules
on every deployment. This is because AWS Lambda didn't allow me to access any binary file from the /lib
directly for unknown reason. In order to perform the copy on every deployment I added the following line to my deploy.sh
file:
`cp -R ./lib/imagemagick ./node_modules/imagemagick`
Now the binaries are ready to be used, but still AWS Lambda didn't give me permission to run any command directly from within node_modules
. So every time I needed to run a particular command I needed to copy it (it is a binary file) into the /tmp
folder and then I needed to change its mode chmod
to be able to run it. This is the code for every needed command (in Node):
const command = '/node_modules/imagemagick/[command path and file]'; execSync(`cp -a ${command} /tmp/`); fs.chmodSync(command, 755); execSync(`chmod +x ${command}`);
Now the command is ready to be used with child_process
. For example:
const argus = [originalImage, '-o', newImage]; child_process.execFile(command, argus, (err, stdout, stderr) ( if (err) throw err; console.log('IMAGE CONVERTED'); )}
The above applies not only on ImageMagick, but on any other binary needed with AWS Lambda. I applied the same on Google's WebP
library somewhere else in my function. I downloaded its Linux binaries from Google developers website.
This is it. My code works as expected. If you have any better idea on improving it I would appreciate a comment.
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