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Only use xref fallback if `PDFNoValidXRef` is raised and `fallback` is True (#684) 

* check obj type

* update changelog

* Update CHANGELOG.md

* add changes

* update change

* update changelog

* Use fallback in except clause

* Update changelog.md

Co-authored-by: Pieter Marsman <pietermarsman@gmail.com>
Co-authored-by: Tony Tong <baojia.tong@kensho.com>
pull/707/head
Tony(Baojia) Tong 2022-01-31 19:20:52 -05:00 committed by GitHub
parent dc530f3a6f
commit 4b138a6bc5
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2 changed files with 11 additions and 8 deletions
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5
CHANGELOG.md
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@ -15,6 +15,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
- Add handling of JPXDecode filter to enable extraction of images for some pdfs ([#645](https://github.com/pdfminer/pdfminer.six/pull/645))
- Fix extraction of jbig2 files, which was producing invalid files ([#652](https://github.com/pdfminer/pdfminer.six/pull/653))
- Crash in `pdf2txt.py --boxes-flow=disabled` ([#682](https://github.com/pdfminer/pdfminer.six/pull/682))
- Only use xref fallback if `PDFNoValidXRef` is raised and `fallback` is True ([#684](https://github.com/pdfminer/pdfminer.six/pull/684))
### Changed
- Replace warnings.warn with logging.Logger.warning in line with [recommended use](https://docs.python.org/3/howto/logging.html#when-to-use-logging) ([#673](https://github.com/pdfminer/pdfminer.six/pull/673))
## [20211012]
@ -41,7 +45,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
- Support for Python 3.4 and 3.5 ([#522](https://github.com/pdfminer/pdfminer.six/pull/522))
- Unused dependency on `sortedcontainers` package ([#525](https://github.com/pdfminer/pdfminer.six/pull/525))
- Support for non-standard output streams that are not binary ([#523](https://github.com/pdfminer/pdfminer.six/pull/523))
- Replace warnings.warn with logging.Logger.warning in line with [recommended use](https://docs.python.org/3/howto/logging.html#when-to-use-logging) ([#673](https://github.com/pdfminer/pdfminer.six/pull/673))
- Dependency on typing-extensions introduced by [#661](https://github.com/pdfminer/pdfminer.six/pull/661) ([#677](https://github.com/pdfminer/pdfminer.six/pull/677))
## [20201018]

4
pdfminer/pdfdocument.py
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@ -11,7 +11,7 @@ from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from . import settings
from .arcfour import Arcfour
from .pdfparser import PDFSyntaxError, PDFParser, PDFStreamParser
from .pdftypes import DecipherCallable, PDFException, PDFTypeError, PDFStream,\
from .pdftypes import DecipherCallable, PDFException, PDFTypeError, PDFStream, \
PDFObjectNotFound, decipher_all, int_value, str_value, list_value, \
uint_value, dict_value, stream_value
from .psparser import PSEOF, literal_name, LIT, KWD
@ -706,12 +706,12 @@ class PDFDocument:
pos = self.find_xref(parser)
self.read_xref_from(parser, pos, self.xrefs)
except PDFNoValidXRef:
pass # fallback = True
if fallback:
parser.fallback = True
newxref = PDFXRefFallback()
newxref.load(parser)
self.xrefs.append(newxref)
for xref in self.xrefs:
trailer = xref.get_trailer()
if not trailer: