55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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from copy import copy
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import sys
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from ..parser import parse_content
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from ..eraser import remove_object_by_id
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from ..plugin import Plugin
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class IEEEXplore(Plugin):
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"""
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IEEE Xplore
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~~~~~~~~~~~~~~~
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"""
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@classmethod
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def scrub(cls, content, verbose=0):
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evil_ids = []
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# parse the pdf into a pdfminer document
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pdf = parse_content(content)
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# get a list of all object ids
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xrefs = pdf._parser.read_xref()
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xref = xrefs[0]
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objids = xref.get_objids()
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# check each object in the pdf
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for objid in objids:
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# get an object by id
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obj = pdf.getobj(objid)
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if hasattr(obj, "attrs"):
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# watermarks tend to be in FlateDecode elements
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if obj.attrs.has_key("Filter") and str(obj.attrs["Filter"]) == "/FlateDecode":
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#length = obj.attrs["Length"]
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#rawdata = copy(obj.rawdata)
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data = copy(obj.get_data())
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phrase= "Authorized licensed use limited to: "
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if phrase in data:
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if verbose >= 2:
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sys.stderr.write("%s: Found object %s with %r: %r; omitting..." % (cls.__name__, objid, phrase, data[data.index(phrase):data.index(phrase)+1000]))
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elif verbose >= 1:
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sys.stderr.write("%s: Found object %s with %r; omitting..." % (cls.__name__, objid, phrase,))
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evil_ids.append(objid)
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for objid in evil_ids:
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content = remove_object_by_id(content, objid)
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return content
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