tinifyd is a NodeJS process that continuously monitors a filesystem path for changes to PNG and JPEG images. It compresses images on the fly via the TinyPNG API.
TinyPNG is a fantastic image compression service, but its algorithm is lossy. Repeatedly compressing the same image will result in perceptible image degradation. tinifyd remembers the SHA-1 sum of every image that is has ever optimized, along with its path so that images are optimized only once.
- Low CPU load; images are compressed on TinyPNG's servers
- Images are optimized only once
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Clone this repository
git clone -b 0.9.1 --depth 1 git@github.com:itconsultis/tinifyd.git -
Copy
src/.env.exampletosrc/.env. -
Edit
src/.envas needed. -
Run the
startscript from the project root../start
npm test
- Ensure the image is a JPG or PNG
- Acquire a lock on the image path
- Compute the current hash sum of the image
- Ensure the hash sum is not in the blob table; escape if it is
- Optimize the image via tinify
- Compute the hash sum of the optimized image
- Replace the original with the optimized one
- Record the optimized hash sum in the blob table
- Release the lock on image path
- Iterate over JPG and PNG image blobs found in the source directory
- Execute single image optimization procedure on each image that is found
- Listen for file change events on the source directory
- Execute single image optimization procedure on each file that changes
Locking will be pessimistic. The janitor plugin will periodically remove
stale locks.
Each single image optimization procedure is to be queued into one ore more asynchronous task buffers. Each async buffer will have a cap on the number of concurrent optimization operations. This cap is to be configurable.
MIT