Скачать или смотреть Fixing Duplicate Entries in Zip Files Created from Minio Objects in Python

Learn how to create Zip files efficiently from Minio objects in Python without duplicating file entries. Explore chunked writing and the correct methods to achieve your goals.
---
This video is based on the question https://stackoverflow.com/q/78198143/ asked by the user 'lr_optim' ( https://stackoverflow.com/u/11023647/ ) and on the answer https://stackoverflow.com/a/78200869/ provided by the user 'Mark Adler' ( https://stackoverflow.com/u/1180620/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, comments, revision history etc. For example, the original title of the Question was: Python: Creating Zip file from Minio objects results in duplicate entries for each file

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Solving the Issue of Duplicate Entries in Zip Files from Minio Objects

When working with file storage systems such as Minio, you may encounter challenges while creating Zip files from large objects stored there. A common issue is the creation of duplicate entries in the resulting Zip file, especially when dealing with large file sizes. If you're facing a similar situation, where you want to efficiently write files in chunks without duplicating file names in your Zip output, you’ve come to the right place. In this guide, we’ll explore the problem and provide a detailed solution.

Understanding the Problem

In your application, you are retrieving files from a Minio storage service and creating a Zip file from them. However, you’ve noticed that your resulting Zip file contains multiple entries with the same file name. This duplication occurs because, while writing file chunks into the Zip file, you’re using the same method repeatedly, which causes each chunk to be treated as a separate file.

The Code Causing the Issue

Consider the following snippet of code that you are currently using to write chunks to your Zip file:

[[See Video to Reveal this Text or Code Snippet]]

In this code, zip_file.writestr(file_name, chunk) is called for each chunk, leading to the same file_name being re-written multiple times in the Zip file.

The Solution

To prevent the duplication of file entries in your Zip file, it’s essential to modify the way you write chunks to the file. Instead of re-using the zip_file.writestr() method, you can open a Zip entry once and write to it multiple times. Here’s how to do it:

Step-by-Step Solution

Open the Zip Entry: Use the zip_file.open() method to create a new entry in the Zip file for each source file.

Write Chunks to the Zip Entry: Instead of writing chunks directly using writestr(), use the entry object to write chunks sequentially.

Revised Code Snippet

Here's how you can implement the suggested changes in your existing code:

[[See Video to Reveal this Text or Code Snippet]]

Benefits of This Approach

No Duplicate Entries: By opening the Zip entry once and writing to it, you ensure that there’s only one entry per file in the Zip output.

Efficient Handling of Large Files: This method allows you to handle each chunk smoothly, enabling the processing of large files without overwhelming your system's memory.

Conclusion

Creating Zip files from Minio objects can be done effectively by properly managing how you write chunks to the file. Remember to open a Zip entry for each original file before starting to write any chunks. This way, your final Zip output will contain the original filenames without duplication, resolving the issue entirely.

If you have any further questions or would like to discuss this topic in more detail, feel free to reach out in the comments! Happy coding!