mirror of
https://github.com/paperless-ngx/paperless-ngx.git
synced 2025-04-02 13:45:10 -05:00
115 lines
3.3 KiB
Python
115 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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# Generated by Django 1.9.2 on 2016-03-05 00:40
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from __future__ import unicode_literals
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import gnupg
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import os
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import re
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import shutil
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import subprocess
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import tempfile
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from django.conf import settings
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from django.db import migrations
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from django.utils.termcolors import colorize as colourise # Spelling hurts me
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class GnuPG(object):
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"""
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A handy singleton to use when handling encrypted files.
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"""
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gpg = gnupg.GPG(gnupghome=settings.GNUPG_HOME)
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@classmethod
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def decrypted(cls, file_handle):
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return cls.gpg.decrypt_file(
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file_handle, passphrase=settings.PASSPHRASE).data
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@classmethod
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def encrypted(cls, file_handle):
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return cls.gpg.encrypt_file(
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file_handle,
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recipients=None,
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passphrase=settings.PASSPHRASE,
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symmetric=True
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).data
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def move_documents_and_create_thumbnails(apps, schema_editor):
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documents = os.listdir(os.path.join(settings.MEDIA_ROOT, "documents"))
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if set(documents) == {"originals", "thumbnails"}:
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return
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print(colourise(
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"\n\n"
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" This is a one-time only migration to generate thumbnails for all of your\n"
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" documents so that future UIs will have something to work with. If you have\n"
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" a lot of documents though, this may take a while, so a coffee break may be\n"
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" in order."
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"\n", opts=("bold",)
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))
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for f in sorted(documents):
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if not f.endswith("gpg"):
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continue
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print(" {} {} {}".format(
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colourise("*", fg="green"),
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colourise("Generating a thumbnail for", fg="white"),
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colourise(f, fg="cyan")
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))
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thumb_temp = tempfile.mkdtemp(
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prefix="paperless", dir=settings.SCRATCH_DIR)
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orig_temp = tempfile.mkdtemp(
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prefix="paperless", dir=settings.SCRATCH_DIR)
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orig_source = os.path.join(settings.MEDIA_ROOT, "documents", f)
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orig_target = os.path.join(orig_temp, f.replace(".gpg", ""))
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with open(orig_source, "rb") as encrypted:
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with open(orig_target, "wb") as unencrypted:
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unencrypted.write(GnuPG.decrypted(encrypted))
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subprocess.Popen((
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settings.CONVERT_BINARY,
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"-scale", "500x5000",
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"-alpha", "remove",
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orig_target,
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os.path.join(thumb_temp, "convert-%04d.png")
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)).wait()
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thumb_source = os.path.join(thumb_temp, "convert-0000.png")
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thumb_target = os.path.join(
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settings.MEDIA_ROOT,
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"documents",
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"thumbnails",
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re.sub(r"(\d+)\.\w+(\.gpg)", "\\1.png\\2", f)
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)
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with open(thumb_source, "rb") as unencrypted:
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with open(thumb_target, "wb") as encrypted:
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encrypted.write(GnuPG.encrypted(unencrypted))
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shutil.rmtree(thumb_temp)
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shutil.rmtree(orig_temp)
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shutil.move(
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os.path.join(settings.MEDIA_ROOT, "documents", f),
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os.path.join(settings.MEDIA_ROOT, "documents", "originals", f),
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)
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class Migration(migrations.Migration):
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dependencies = [
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('documents', '0011_auto_20160303_1929'),
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]
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operations = [
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migrations.RunPython(move_documents_and_create_thumbnails),
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]
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