if you need to server the pdf then it will be downloaded to the user computer, even if you are visualizing in browser with js.
What you can do is show screenshots of the pdf pages, then you would be serving individual jpgs for each page and not a single 100mb file. You can create previews for each page using something like imagemagick as mentioned before and create a layout to view that using django template. On Sun, Sep 4, 2016 at 9:52 AM, <[email protected]> wrote: > Hello, > > Maybe you could use ImageMagick to show one page of the pdf as an image ? > This is what I have implemented on my project : first page of pdf files can > be pre-viewed before user uploads the whole file (if needed). In your case, > pre-viewing could be parametrized to show page ‘n’ of the pdf file, > probably. In my project, pre-viewing image is generated when pdf file is > uploaded and saved by admin in myproject/media/files directory. Once pdf > files are in media directory, users can preview those pdf files and tnen > upload them, if needed (only first page can be pre-viewed by user. This is > an implementation choice). > > > http://www.imagemagick.org/script/index.php > > > <http://www.imagemagick.org/script/index.php> > > Implementation principles/credit can be found here : > > http://www.yaconiello.com/blog/auto-generating-pdf-covers/ > > > <http://www.yaconiello.com/blog/auto-generating-pdf-covers/> > > I am attaching the signals file_post_save file_pre_save, for information. > > > Cheers. > > Django 1.8 > Python 3.4 > > > Note : to install ImageMagick: > > sudo apt-get install libmagickwand-dev imagemagick libmagickcore-dev > > The convert command allows to convert any page of pdf file into png image > (for instance), eg : > > convert -thumbnail 1280 test.pdf[0] test_1280.png > Several parameters exist to tune image quality (in my case, need to use > density, trim and quality). > > > > *models.p**y* > > […] > > ########### > > # SIGNALS # > > ########### > > from django.db.models.signals import post_save, pre_delete > > from django.dispatch import receiver > > from myproject.settings import MEDIA_ROOT > > import subprocess > > > # What to do after a File is saved - receiver definition > > def file_post_save(sender, instance=False, **kwargs): > > # This post save function creates a thumbnail for the File > > file = File.objects.get(pk=instance.pk) > > command = "convert -density 300 -trim -thumbnail %s %s%s[0] > -quality 100 %s%s" % (file.thumbnail_size, MEDIA_ROOT, file.file, > MEDIA_ROOT, file.thumbnail) > > proc = subprocess.Popen(command, > > shell=True, > > stdin=subprocess.PIPE, > > stdout=subprocess.PIPE, > > stderr=subprocess.PIPE, > > ) > > stdout_value = proc.communicate()[0] > > post_save.connect(file_post_save, sender=File, > dispatch_uid="file_post_save_uid") > > > > # What to do before a File is deleted - receiver definition > > def file_pre_delete(sender, instance=False, **kwargs): > > # This pre delete function deletes file and thumbnail from > media directory > > file = File.objects.get(pk=instance.pk) > > command = "rm %s%s %s%s" % (MEDIA_ROOT, file.file, > MEDIA_ROOT, file.thumbnail) > > proc = subprocess.Popen(command, > > shell=True, > > stdin=subprocess.PIPE, > > stdout=subprocess.PIPE, > > stderr=subprocess.PIPE, > > ) > > stdout_value = proc.communicate()[0] > > pre_delete.connect(file_pre_delete, sender=File, > dispatch_uid="file_pre_delete_uid") > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/django-users/e409aafa-3133-47b1-b465-7d74501d0cac%40googlegroups.com > <https://groups.google.com/d/msgid/django-users/e409aafa-3133-47b1-b465-7d74501d0cac%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAFWa6tLODtEQ_5Tde-Axe3khKKzDCa58%3D-u3%2Bnk7vx3F6uQQQA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
