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##########################################################################
#
# pgAdmin 4 - PostgreSQL Tools
#
# Copyright (C) 2013 - 2024, The pgAdmin Development Team
# This software is released under the PostgreSQL Licence
#
##########################################################################
import codecs
def read_file_generator(file, enc):
"""
This will read the content of the file selected by user
Returns:
Content of file
"""
try:
with codecs.open(file, 'r', encoding=enc) as fileObj:
while True:
# 4MB chunk (4 * 1024 * 1024 Bytes)
data = fileObj.read(4194304)
if not data:
break
yield data
except UnicodeDecodeError:
# This is the closest equivalent Python 3 offers to the permissive
# Python 2 text handling model. The latin-1 encoding in Python
# implements ISO_8859-1:1987 which maps all possible byte values
# to the first 256 Unicode code points, and thus ensures decoding
# errors will never occur regardless of the configured error and
# handles most of the Windows encodings
# handler.
# Ref: https://goo.gl/vDhggS
with codecs.open(file, 'r', encoding='latin-1') as fileObj:
while True:
# 4MB chunk (4 * 1024 * 1024 Bytes)
data = fileObj.read(4194304)
if not data:
break
yield data
except Exception:
# As a last resort we will use the provided encoding and then
# ignore the decoding errors
with codecs.open(file, 'r', encoding=enc, errors='ignore') as fileObj:
while True:
# 4MB chunk (4 * 1024 * 1024 Bytes)
data = fileObj.read(4194304)
if not data:
break
yield data