I have a program, in which I need to convert a PDF to an image using Image Magick. I do that using the subprocess
package:
cmd = 'magick convert -density 300 '+pdfFile+'['+str(rangeTuple[0])+'-'+str(rangeTuple[1])+'] -depth 8 '+'temp.tiff' #WINDOWS
if(os.path.isfile('temp.tiff')):
os.remove('temp.tiff')
subprocess.call(cmd,shell=True)
im = Image.open('temp.tiff')
The error I got is:
convert-im6.q16: not authorized `temp2.pdf' @ error/constitute.c/ReadImage/412.
convert-im6.q16: no images defined `temp.tiff' @ error/convert.c/ConvertImageCommand/3258.
Traceback (most recent call last):
File "UKExtraction2.py", line 855, in <module>
doItAllUpper("A0","UK5.csv","temp",59,70,"box",2,1000,firstPageCoordsUK,boxCoordUK,voterBoxCoordUK,internalBoxNumberCoordUK,externalBoxNumberCoordUK,addListInfoUK)
File "UKExtraction2.py", line 776, in doItAllUpper
doItAll(tempPDFName,outputCSV,2,pdfs,formatType,n_blocks,writeBlockSize,firstPageCoords,boxCoord,voterBoxCoord,internalBoxNumberCoord,externalBoxNumberCoord,addListInfo,pdfName)
File "UKExtraction2.py", line 617, in doItAll
mainProcess(pdfName,(0,noOfPages-1),formatType,n_blocks,outputCSV,writeBlockSize,firstPageCoords,boxCoord,voterBoxCoord,internalBoxNumberCoord,externalBoxNumberCoord,addListInfo,bigPDFName,basePages)
File "UKExtraction2.py", line 542, in mainProcess
im = Image.open('temp.tiff')
File "/home/rohit/.local/lib/python3.6/site-packages/PIL/Image.py", line 2609, in open
fp = builtins.open(filename, "rb")
FileNotFoundError: [Errno 2] No such file or directory: 'temp.tiff'
The most important of which is:
convert-im6.q16: not authorized `temp2.pdf' @ error/constitute.c/ReadImage/412.
I think this is because ImageMagick isn't authorized to access the PDF. What should be done now? I'm on a Linux server. Any help is appreciated.
emcconville is correct. More specifically edit the Imagemagick policy.xml file to uncomment this line:
<!-- <policy domain="module" rights="none" pattern="{PS,PDF,XPS}" /> -->
And change it from rights="none" to rights="read|write"
<policy domain="module" rights="read|write" pattern="{PS,PDF,XPS}" />
This was a recent addition to the policy.xml file, I believe, due to a security flaw found in the Ghostscript delegate. I think that flaw has now been fixed in the current version of Ghostscript, which is 9.25.
NOTE: On some systems the policy line will have domain="coder" rather than domain="module"
Quick and easy solution:
sudo mv /etc/ImageMagick-6/policy.xml /etc/ImageMagick-6/policy.xml.off
When done, you can restore the original with
sudo mv /etc/ImageMagick-6/policy.xml.off /etc/ImageMagick-6/policy.xml
I am using Dockerfile to update an image, and suddenly I got the policy.xml file in my way. although the version of Ubuntu (xenial) was the same and ImageMagick as well.
I ended up removing the single line causing my problem.
RUN sed -i 's/^.*policy.*coder.*none.*PDF.*//' /etc/ImageMagick-6/policy.xml
hope this helps someone
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