问题
In short:
- I need to split a single (or more) file(s) into multiple max-sized archives using dummy-safe format (e.g. zip or rar anything that work will do!).
- I would love to know when a certain part is done (callback?) so I could start shipping it away.
- I would rather not do it using rar or zip command line utilities unless impossible otherwise.
- I'm trying to make it os independent for the future but right now I can live if the compression could be made only on linux (my main pc) I still need to make it easily opened in windows (wife's pc)
In long:
I'm writing an hopefully to-be-awesome backup utility that scans my pictures folder, zips each folder and uploads them to whatever uploading class is registered (be it mail-sending, ftp-uploading, http-uploading).
I used zipfile to create a gigantic archive for each folder but since my uploading speed is really bad I let it work at only at nights but my internet goes off occassionally and the whole thing messes up. So I decided to split it into ~10MB pieces. I found no way of doing it with zipfile so I just added files to the zip until it reached > 10MB.
Problem is there are often 200-300MB and sometimes more videos in there and again we reach the middle-of-the-night cutoffs.
I am using Subprocess with "rar" right now to create the split archives but since directories are so big and I'm using large compression this thing takes ages even the first files are already ready - this is why I love to know when a file is ready to be sent.
So short story long I need a good way to split it into max-sized archives. I am looking at making it somewhat generic and as dummy-proof as possible as eventually I'm planning on making it some awesome extensible backup library..
来源：https://stackoverflow.com/questions/10539612/create-split-archives-zip-rar-7z