PyPDF2 编码问题 PyPDF2.utils.PdfReadError Illegal character in Name Object

参考资料：https://github.com/mstamy2/PyPDF2/issues/438

使用 PyPDF2 做合并 PDF 文件时报错如下：

Traceback (most recent call last):File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\generic.py", line 484, in readFromStreamreturn NameObject(name.decode('utf-8'))
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xcb in position 8: invalid continuation byteDuring handling of the above exception, another exception occurred:Traceback (most recent call last):File "D:\projects\myproject\apps\backstage\views\busi_contract_manage_view.py", line 703, in postmerge_pdf_result = merge_pdf(final_files, pdf_path)File "D:\projects\myproject\apps\utils\doc_convert_util.py", line 86, in merge_pdfpdf_writer.write(new_file)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 482, in writeself._sweepIndirectReferences(externalReferenceMap, self._root)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferencesself._sweepIndirectReferences(externMap, realdata)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferencesvalue = self._sweepIndirectReferences(externMap, value)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferencesself._sweepIndirectReferences(externMap, realdata)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferencesvalue = self._sweepIndirectReferences(externMap, value)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 556, in _sweepIndirectReferencesvalue = self._sweepIndirectReferences(externMap, data[i])File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferencesself._sweepIndirectReferences(externMap, realdata)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferencesvalue = self._sweepIndirectReferences(externMap, value)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferencesvalue = self._sweepIndirectReferences(externMap, value)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferencesvalue = self._sweepIndirectReferences(externMap, value)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 577, in _sweepIndirectReferencesnewobj = data.pdf.getObject(data)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\pdf.py", line 1611, in getObjectretval = readObject(self.stream, self)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\generic.py", line 66, in readObjectreturn DictionaryObject.readFromStream(stream, pdf)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\generic.py", line 579, in readFromStreamvalue = readObject(stream, pdf)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\generic.py", line 60, in readObjectreturn NameObject.readFromStream(stream, pdf)File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\generic.py", line 492, in readFromStreamraise utils.PdfReadError("Illegal character in Name Object")
PyPDF2.utils.PdfReadError: Illegal character in Name Object

找到对应的报错文件

File "D:\projects\myproject\venv\lib\site-packages\PyPDF2\generic.py", line 484

第484行原代码：

try:return NameObject(name.decode('utf-8'))
except (UnicodeEncodeError, UnicodeDecodeError) as e:# Name objects should represent irregular characters# with a '#' followed by the symbol's hex numberif not pdf.strict:warnings.warn("Illegal character in Name Object", utils.PdfReadWarning)return NameObject(name)else:raise utils.PdfReadError("Illegal character in Name Object")

在 except 中加入代码

return NameObject(name.decode('gbk'))

修改后

try:return NameObject(name.decode('utf-8'))
except (UnicodeEncodeError, UnicodeDecodeError) as e:try:return NameObject(name.decode('gbk'))except (UnicodeEncodeError, UnicodeDecodeError) as e:# Name objects should represent irregular characters# with a '#' followed by the symbol's hex numberif not pdf.strict:warnings.warn("Illegal character in Name Object", utils.PdfReadWarning)return NameObject(name)else:raise utils.PdfReadError("Illegal character in Name Object")

修改后仍会报错，需要修改修改另一处

Lib/site-packages/PyPDF2/utils.py 第238行

原代码

r = s.encode('latin-1')
if len(s) < 2:bc[s] = r
return r

修改后代码：

try:r = s.encode('latin-1')
except Exception as e:r = s.encode('utf-8')
if len(s) < 2:bc[s] = r
return r

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