fix #28 invalid signature: 0x80014

[hasanlussa]

No description provided.

[DaSpawn]

This also is solved with node-stream-zip, I have rewrote/mostly finished the streaming reader and used node-stream-zip. My pull is #61 in case anyone else wondering/needing before merged

[matteocontrini]

Up

[JAForbes]

I'm experiencing this issue too.

[JAForbes]

Just to confirm: this PR fixed #28 for me.

[guyonroche]

I'm going to merge in this PR soon as it is the simplest fix for the invalid signature problem.
@DaSpawn - I still want to take a look at your work on the streaming reader though - getting that working is still one of the biggest missing pieces for this lib.

[DaSpawn]

I ended up writing an excel reader from scratch, https://github.com/DaSpawn/xlsx-stream-reader, I am not sure if you would be able to pull this into your project or not. My module does not parse styles (only stores as is), but it reads all sheets, shared strings, and formula stored values (not parse formulas) and uses events for data

The main reason I had to change this is your module uses blocking reads/writes and would hang my entire application while processing, so I had the reader wrapped into a child process to do the processing (just too much overhead/hack doing it like that). The reader was also exceptionally slow, and could not handle the 100x20000 excel sheets I was trying to read without taking a very long time and usually timing out the web page uploading the sheet (my processor can read those sheets in about 15 seconds)

Let me know if you need any more details