Announcing serverless-iiif v8.0.0

[Michael B. Klein]

I am pleased to announce the release of serverless-iiif version 8.0.0. This release offers several improvements and new features, as well as deprecations and breaking changes.

Code: https://github.com/samvera/serverless-iiif

Documentation: https://samvera.github.io/serverless-iiif

New Features, Improvements, and Bug Fixes

• Correct tile sizes in info.json responses.
• More efficient probing for image size, depth, and tile dimensions.
• Support for namespaced metadata (e.g., iiif-width and iiif-height instead of width and height), while retaining support for the non-namespaced versions.
• Support for new tilewidth, tileheight, and tilesize metadata properties to avoid having to probe the image for them.
• Two new command-line scripts included in the source repository to assist with tiled TIFF creation and adding correct metadata to existing S3 objects:
• create-tiled-tiff
• create-metadata

Breaking Changes and Deprecations

• (BREAKING) serverless-iiif v8.x is pickier about image metadata than previous versions were. If width and height are present in the metadata without pages or tile size information (or a PyramidLimit setting – see below), serverless-iiif will assume the file contains a single-resolution, untiled image, and process it less efficiently.
• (BREAKING) The expected shape of the x-preflight-dimensions header has changed. If you use a preflight function, check the documentation for details.
• (DEPRECATION) The PyramidLimit option is still available and respected by the default dimension resolver, but its default is now 0 (disabled). It is strongly recommended that this option be disabled and correct image metadata used instead.

Thanks to everyone who has tried, tested, deployed, and reviewed the application, and provided feedback and bug reports over the past several months.

Michael Klein

serverless-iiif maintainer
Developer Lead, Academic Innovation
Northwestern University Library