Extract from PDF node to support embedded PDF attachments

Feature Requests Nodes
8

In topic Binary input not accessible in Code Python (Beta) node - #2 by napped @moosa suggested to move binary data to a JSON as base64 and it did work.

After that change following code can successfully extract attached XML invoice from PDF in n8n cloud version 1.116.2 :partying_face:

import re
import zlib
import base64

output = []

# Get the binary data from the first input item and decode from base64
#pdf_b64 = items[0]["binary"]["data"]["data"]
pdf_b64 = items[0]["json"]["data"]
#print(pdf_b64)
pdf = base64.b64decode(pdf_b64)
#print(pdf)

stream = re.compile(rb'.*?FlateDecode.*?stream(.*?)endstream', re.S)

for s in stream.findall(pdf):
    s = s.strip(b'\r\n')
    try:
        decompressed = zlib.decompress(s)
        decoded = decompressed.decode('utf8')
        if 'Invoice' in decoded:
          output.append({"json": {"isdoc": decoded}})
    except:
        pass

return output
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