stream-unzip | Python function to stream unzip | Compression library

by uktrade Python Version: 0.0.91 License: MIT

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | stream-unzip Summary

stream-unzip is a Python library typically used in Utilities, Compression applications. stream-unzip has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can install using 'pip install stream-unzip' or download it from GitHub, PyPI.

Python function to stream unzip all the files in a ZIP archive: without loading the entire ZIP file or any of its files into memory at once

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Quality

Security

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stream-unzip has a low active ecosystem.

It has 218 star(s) with 8 fork(s). There are 14 watchers for this library.

There were 3 major release(s) in the last 12 months.

There are 0 open issues and 11 have been closed. On average issues are closed in 3 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of stream-unzip is 0.0.91

Quality

stream-unzip has 0 bugs and 0 code smells.

Security

stream-unzip has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

stream-unzip code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

stream-unzip is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

stream-unzip releases are available to install and integrate.

Deployable package is available in PyPI.

Build file is available. You can build the component from source.

Installation instructions are not available. Examples and code snippets are available.

It has 838 lines of code, 90 functions and 3 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed stream-unzip and discovered the below as its top functions. This is intended to give you an instant insight into stream-unzip implemented functionality, and help decide if they suit your requirements.

Stream data from a zipfile generator .
Returns the long description of the README . md file .

Get all kandi verified functions for this library.

stream-unzip Key Features

No Key Features are available at this moment for stream-unzip.

stream-unzip Examples and Code Snippets

No Code Snippets are available at this moment for stream-unzip.

Community Discussions

Trending Discussions on stream-unzip

Original ZIP size limits 2^32 vs 2^32 - 1. Is there an off by 1 error in Wikipedia?

ZIP's CRC-32 for encryption isn't quite zlib's crc32... why?

QUESTION

Original ZIP size limits 2^32 vs 2^32 - 1. Is there an off by 1 error in Wikipedia?

Asked 2022-Jan-03 at 07:07

According to https://en.wikipedia.org/wiki/ZIP_(file_format)#ZIP64

The original .ZIP format had a 4 GB (2^32 bytes) limit on various things (uncompressed size of a file, compressed size of a file, and total size of the archive), as well as a limit of 65,535 (2^16-1) entries in a ZIP archive.

Is the 2^32 value correct? By my understanding, the maximum value should be the maximum possible value held in a 32 bit unsigned integer, which is 2^32-1

I know that 2^32-1 does have particular meaning according to the ZIP spec at https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT (usually mentioned as 0xFFFFFFFF), so I don't want to assume anything.

The 2^16-1 limit for number of entries does seem right to me, as the maximum value that can be stored in a 16 bit unsigned integer.

Context: I'm writing code to write ZIP files in a streaming way in Python https://github.com/uktrade/stream-zip, as well code to open ZIP files in a streaming way https://github.com/uktrade/stream-unzip, and I want both to handle the various limits correctly. Or if not "correctly" (say if there is no "correctly") as best as is reasonable.

...

ANSWER

Answered 2022-Jan-03 at 07:07

Elsewhere on the same Wikipedia page includes the minus 1: https://en.wikipedia.org/wiki/ZIP_(file_format)#Limits

The maximum size for both the archive file and the individual files inside it is 4,294,967,295 bytes (2^32−1 bytes, or 4 GB minus 1 byte) for standard ZIP.

Also in the ZIP specification at https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT, there are various mentions of the size fields being 4 bytes, e.g.

Source https://stackoverflow.com/questions/70555862

QUESTION

ZIP's CRC-32 for encryption isn't quite zlib's crc32... why?

Asked 2021-Sep-06 at 06:30

I'm writing my own unzip code, and (from trial and error, no understanding) it looks like the CRC-32 algorithm on the one byte that decryption requires doesn't quite match up with zlib's. To convert from one to the other:

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ANSWER

Answered 2021-Sep-06 at 06:30

Ok, you're not completely wrong. It is indeed the same CRC-32 algorithm, but without the pre and post-processing (inverting the CRC coming in and going out). It is truly odd code that is trying to replicate that with the zlib.crc32 function. All you need is this:

Source https://stackoverflow.com/questions/69061089

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install stream-unzip

You can install using 'pip install stream-unzip' or download it from GitHub, PyPI.
You can use stream-unzip like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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