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Hello,
I have a strange probleme. I use this piece of python2 code to generate PDF and TEX files (thats my "creation(parametres)" fonction) in a tmp file (in /tmp).
This PDF and TEX files are compress in one ZIP call exercice.zip and send to the client.
# Creation d'un dossier temporaire dans tmp et creation des exercices
parametres['chemin_fichier'] = mkdtemp(dir=dossier_creation)
# Au cas ou la creation des exercices echoue
try:
creation(parametres)
# Compression de tous les fichiers crees en zip
buffer_zip = BytesIO()
archive = ZipFile(buffer_zip, 'w', ZIP_DEFLATED)
for fichier in listdir(parametres['chemin_fichier']):
archive.write(fichier)
archive.close()
# Envoie du zip
buffer_zip.seek(0)
print "Content-type: application/zip\r\nContent-Disposition: attachment; filename=exercice.zip\r\nContent-Title: exercice.zip\r\n\r\n"
print buffer_zip.read()
buffer_zip.close()
return u"Terminé"
except:
return u"Erreur interne"
finally:
# Supression du dossier temporaire
rmtree(parametres['chemin_fichier'])This code work, but i have a problem with the ZIP file. This file work with fileroller, 7-zip, but windows XP built in tools won't (invalid file). On android, Astro File manager and androzip file manager show me an empty file.
I search the whole internet, but....
Last edited by jbreizh (2014-02-07 05:14:26)
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If you to see my app in full action, Actimaths, but i don't think it work well as i live in New Caledonia (french pacific island) and our internet is sssslllllllloooooowwwwwwww.
Here also an exemple of ZIP file: exercice.zip
Last edited by jbreizh (2014-01-30 01:19:03)
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You didn't try regular unzip?
% unzip exercice.zip
Archive: exercice.zip
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of exercice.zip or
exercice.zip.zip, and cannot find exercice.zip.ZIP, period.Try to do it without seek()ing, as that is almost certainly the cause of your trouble.
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Ok,
no i didn't try with regular unzip. So their is a problem with my zip. So i try with this code:
# Creation d'un dossier temporaire dans tmp et creation des exercices
parametres['chemin_fichier'] = mkdtemp(dir=dossier_creation)
# Au cas ou la creation des exercices echoue
try:
creation(parametres)
# Compression de tous les fichiers crees en zip
# buffer_zip = BytesIO()
# archive = ZipFile(buffer_zip, 'w', ZIP_DEFLATED)
archive = ZipFile("/tmp/test.zip", 'w', ZIP_DEFLATED)
for fichier in listdir(parametres['chemin_fichier']):
archive.write(fichier)
archive.close()
# Envoie du zip
#buffer_zip.seek(0)
print "Content-type: application/zip\r\nContent-Disposition: attachment; filename=exercice.zip\r\nContent-Title: exercice.zip\r\n\r\n"
print open("/tmp/test.zip", 'rb').read()
#buffer_zip.close()
return u"Terminé"
except:
return u"Erreur interne"
finally:
# Supression du dossier temporaire
rmtree(parametres['chemin_fichier'])I take back the bytesIO for the moment, so i can see my original zip and the send one. The original zip is ok and the send one is not. I also see take an 92k original zip file become an 200+k zip file. So their is a problem in my send part:
print "Content-type: application/zip\r\nContent-Disposition: attachment; filename=exercice.zip\r\nContent-Title: exercice.zip\r\n\r\n"
print open("/tmp/test.zip", 'rb').read()An idea ?
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So i find the problem !!!!
In fact their was 2 problems , one that I introduce later witch was adding a web page to the zip (pfffffffffff)
BUT the real problem was :
print "Content-type: application/zip\r\nContent-Disposition: attachment; filename=exercice.zip\r\nContent-Title: exercice.zip\r\n\r\n"It introduce a blank line at the beginning of the ZIP file so it become:
print "Content-type: application/zip\r\nContent-Disposition: attachment; filename=exercice.zip\r\nContent-Title: exercice.zip\r\n"I originaly add \r\n\r\n because of advise found on internet. Maybe someone has clear explanation about this?
Thanks for your support
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Python2's print statement adds a newline to whatever it prints, so you actually printed "\r\n\r\n\n" at the end of that line. You can suppress this by adding a comma to the end of the line. The print function has a better syntax for this (which you can use in Python2 by adding "from __future__ import print_function" at the top of the file).
print("content-type: application/zip\r\nblahblahblah\r\n\r\n", end='')Offline
thanks Trent for this explaination. So i read the doc about print and you re rigth it's clearly mark that print had a \n at the end of the line.
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