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License: Mozilla Public License 2.0
Gigapixel PNG tile rendering from mmap cache file
License: Mozilla Public License 2.0
The go/server
Server.image
method is called by multiple http request goroutines, and manipulates the shared server.images
map.
Needs multi-stage Docker builds to strip out all of the npm, C compiler, Go build stuff.
The go/server
keeps the cached images open in memory. When the cache gets updated (docker exec pngtile pngtile ...
), the server should notices that the mtimes have changed, and reload the images (close
+ re-open
).
Workaroud: docker restart
to reload images.
The tile images should support aggressive HTTP caching:
?t=
timestamps from the cachefile mtime in the tile URLsIf-Modified-Since
-> HTTP 304 Not Modified
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