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Python function to construct a ZIP archive with stream processing - without having to store the entire ZIP in memory or disk

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Python function to construct a ZIP archive on the fly - without having to store the entire ZIP in memory or disk. This is useful in memory-constrained environments, or when you would like to start returning compressed data before you've even retrieved all the uncompressed data. Generating ZIPs on-demand in a web server is a typical use case for stream-zip.

Offers similar functionality to zipfly, but with a different API, and does not use Python's zipfile module under the hood. Creates both Zip32/2.0/Legacy and Zip64 files.

To unZIP files on the fly try stream-unzip.


In addition to being memory efficient (with some limitations) stream-zip:

  • Constructs ZIP files that can be stream unzipped, for example by stream-unzip

  • Can construct Zip64 ZIP files. Zip64 ZIP files allow sizes far beyond the approximate 4GiB limit of the original ZIP format

  • Can construct ZIP files that contain symbolic links

  • Can construct ZIP files that contain directories, including empty directories

  • Can construct password protected / AES-256 encrypted ZIP files adhering to the WinZip AE-2 specification.

  • Allows the specification of permissions on the member files and directories (although not all clients respect them)

  • By default stores modification time as an extended timestamp. An extended timestamp is a more accurate timestamp than the original ZIP format allows

Visit the stream-zip documentation for usage instructions.

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