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# -*- coding: utf-8 -*-
import logging
'''
|-------------------------------| -
|--------- PDF Header ----------K1 | J1
|-------------------------------| -
|----- PDF OBJ 1 = ZIP Data ----K2 |
|-------------------------------| -
|---- Original PDF Ojbects -----K3 | J2
|-------------------------------| -
|--- Last OBJ = End Zip Data ---K4 |
|-------------------------------| |
|---------- Xref Table ---------| |
|-------------------------------K5 |
|----------- Trailer -----------| |
|-------------------------------| |
'''
class PolyglotPdfZip():
from PdfFileTransformer import Pdf
from ZipFileTransformer import Zip
def __init__(self, Pdf, Zip):
self.buffer = bytearray()
self.pdf = Pdf
self.zip = Zip
self.buffer = bytearray()
def generate(self):
k2_stream = self.zip.buffer[:self.zip.end_of_data]
size_k2_stream = len(k2_stream)
self.pdf.insert_new_obj_stream_at_start(k2_stream)
offset_k2_stream = self.pdf.get_first_stream_offset()
k4_stream = self.zip.buffer[self.zip.central_dir_file_header:]
size_k4_stream = len(k4_stream)
self.pdf.insert_new_obj_stream_at_end(k4_stream)
offset_k4_stream = self.pdf.get_last_stream_offset()
pdf_buffer = self.pdf.get_build_buffer()
j1 = pdf_buffer[0:offset_k2_stream]
j2 = pdf_buffer[offset_k2_stream + size_k2_stream:offset_k4_stream]
self.zip.add_data_to_file(j1, j2, True)
k5 = pdf_buffer[offset_k4_stream + size_k4_stream:]
self.buffer = self.zip.buffer + k5
def write(self, filename):
fd = open(filename, "wb")
fd.write(self.buffer)
fd.close()
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