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conversion: Do not let PyMuPDF print to stdout

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PyMuPDF has some hardcoded log messages that print to stdout [1]. We don't
have a way to silence them, because they don't use the Python logging
infrastructure.

What we can do here is silence a particular call that's been creating
debug messages. For a long term solution, we have sent a PR to the
PyMuPDF team, and we will follow up there [2].

Fixes #700

[1]: https://github.com/freedomofpress/dangerzone/issues/700
[2]: https://github.com/pymupdf/PyMuPDF/pull/3137
This commit is contained in:
Alex Pyrgiotis 2024-03-05 11:48:38 +02:00
parent be8e2aa36b
commit 74c467eaf7
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1 changed files with 10 additions and 3 deletions
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13
dangerzone/conversion/pixels_to_pdf.py
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@ -6,7 +6,9 @@ Here are the steps, with progress bar percentages:
- 95%-100%: Compress the final PDF - 95%-100%: Compress the final PDF
""" """
import asyncio import asyncio
import contextlib
import glob import glob
import io
import json import json
import os import os
import shutil import shutil
@ -49,9 +51,14 @@ class PixelsToPDF(DangerzoneConverter):
# The first few operations happen on a per-page basis. # The first few operations happen on a per-page basis.
page_size = len(untrusted_rgb_data) page_size = len(untrusted_rgb_data)
total_size += page_size total_size += page_size
pixmap = fitz.Pixmap( with contextlib.redirect_stdout(io.StringIO()):
fitz.Colorspace(fitz.CS_RGB), width, height, untrusted_rgb_data, False pixmap = fitz.Pixmap(
) fitz.Colorspace(fitz.CS_RGB),
width,
height,
untrusted_rgb_data,
False,
)
pixmap.set_dpi(DEFAULT_DPI, DEFAULT_DPI) pixmap.set_dpi(DEFAULT_DPI, DEFAULT_DPI)
if ocr_lang: # OCR the document if ocr_lang: # OCR the document
self.update_progress( self.update_progress(