question: The generated xlsx file with a large number of images cannot be opened properly with Excel

[jmcnamara]

question: The generated xlsx file with a large number of images cannot be opened properly with Excel

[jmcnamara]

Thanks for the report. I'll take a look.

[jmcnamara]

You may already know this but for context a xlsx file is a collection of XML files in a zip container.

I can't find any issue in the XML file structure (although it is hard to be 100% sure since the files are massive).

I think it may be a zipwriter/zip issue. I was able to open the file by unzipping it and then rezipping it. The file is too big to upload here but you can create a rezipped version for testing like this:

unzip basic-full.xlsx -d basic-full

cd basic-full
find . -type f | xargs zip ../basic-rezipped.xlsx
cd ..

ls basic-rezipped.xlsx

Can you try generate the file like that and then open it. I was able to open it successfully (although it takes a while since the file is huge).

[wcshds]

Thanks for your help. After rezipping the file, I can successfully open it now.

[jmcnamara]

I think you should submit this as a bug to zip.rs: https://github.com/zip-rs/zip/issues

Attach the links to the basic-full.xlsx and basic-rezipped.xlsx files and add the commands to create one from the other.

Explain that Excel complains about the first file but not when it is rezipped.

The issue is possibly related to: zip-rs/zip-old#23 (Update: it isn't)

[jmcnamara]

If you make the rezipped file available I can raise the bug report.

[wcshds]

Thanks!
basic-rezip.xlsx

[jmcnamara]

I've opened an issue in zip.rs for this: zip-rs/zip-old#388

I tried to do some analysis on the zip file but didn't get anywhere. Hopefully the zip.rs folk(s) will have a look.

I also noticed that there was a u32 overflow issue highlighted by your test program so I put a fix for that in v0.45.0 on crates.io.

[jmcnamara]

Closing in favour of zip-rs/zip-old#388