Question

I am trying to upload large CSV files onto GAE using a zip using XML & HTTP POST

Steps:

• CSV is zipped & base64 encoded and sent to GAE via XML/HTTP POST

• GAE – using minidom to parse XML

• GAE – Base64 decode ZIP

• GAE – Get CSV from Zip file.

I have tried using zipfile but can’t figure out how to create a zipfile object from the base 64decoded string

I get: TypeError: unbound method read() must be called with ZipFile instance as first argument (got str instance instead)

myZipFile = base64.decodestring(base64ZipFile)

objZip = zipfile.ZipFile(myZipFile,'r')

strCSV = zipfile.ZipFile.read(objZip,'list.csv')

Answer 1

As Rob mentioned, ZipFile requires a file-like object. You can use StringIO to provide a file-like interface to a string.

For example:

import StringIO

myZipFile = base64.decodestring(base64ZipFile)

objZip = zipfile.ZipFile(StringIO.StringIO(myZipFile),'r')