Re: Downloading html as pdf using popen, headless chrome option

[Jisson Varghese]

Check whether FileResponse instead of StreamingHttpResponse helps to solve
the issue ,
https://docs.djangoproject.com/en/4.0/ref/request-response/#fileresponse-objects

On Tue, Feb 1, 2022 at 11:26 PM Aadil Rashid 
wrote:

> I am trying to generating pdf from webpages, using popen , but when i call
> this
> view it generates UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd3
> in position 10: invalid continuation byte
>
> This is my view
> from projName.settings import BASE_DIR
> from subprocess import Popen, PIPE, STDOUT
> from wsgiref.util import FileWrapper
> from django.http import StreamingHttpResponse
>
> class DownloadAsPDF(View):
> def post(self, request, *args, **kwargs):
> base = str(BASE_DIR)
> file_name = str( base + '/testreport.pdf')
> post_url = request.POST.get("page_url")
> url = str('http://' + request.get_host() + post_url)
> chrome_args = ['/path/google-chrome', '--headless',
> '--virtual-time-buget=2',
> '--print-to-pdf=/path/testreport.pdf', url]
> external_process = Popen(chrome_args, stdout=PIPE, stderr=STDOUT)
> external_process.wait()
> return_file = FileWrapper(open('{}'.format(file_name), 'r'))
> download_file_name = 'report'
> response = StreamingHttpResponse(return_file,
> content_type='application/force-download')
> response['Content-Disposition'] = f'attachment; filename=
> {download_file_name}.pdf'
> return response
>
>
> Can please anybody, tell me why is it generating this error and what is
> the possible solution
> this problem, Thanks you very much
>
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> .
>


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*Jisson Varghese*

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Make migration issue for a unique True filed.

[jisson varghese]

I have model MyModel in app app1

class MyModel(models.Model):
 ...
 name = models.CharField(max_length=10, unique=True)


I have made the following change,

class MyModel(models.Model):
 ...
 name = models.CharField(max_length=10, unique=True, null=False)


python manage.py makemigrations  - create migration in file different app, 
and no there is no changes in that model.
When I tried manage.py makemigrations  app1 - No changes detected in app 
'app1'




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Re: new project directory not defined when starting :

[Jisson Varghese]

Hi,
the 
linkmay
help you.

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ipaddress

[Jisson Varghese]

Hi all,

First am sorry ,its a python specific question not django based.
 I am developing a mobile application, using  python in server side. I want
to get user's ipaddress(Now user's request not sending ipaddress as a
parameter to my server). I am using cherrypy server , Now I take IPaddress
using following code,
   ipaddress = cherrypy.request.remote.ip
  I have a doubt whether this generate an ipaddress in the form
xx.0.0.0/32
( a private range ).?
Thanks

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Re: Issues with "startproject"

[Jisson Varghese]

Script name may differ in distribution packages

If you installed Django using a Linux distribution's package manager (e.g.
apt-get or yum) django-admin.py may have been renamed to django-admin. You
may continue through this documentation by omitting .py from each command.

Refer: https://docs.djangoproject.com/en/1.3/intro/tutorial01/
just try django-admin .

On Wed, Jan 4, 2012 at 1:00 PM, Jirka Vejrazka wrote:

> > I was able to get the django-admin.py file to be located and I no
> > longer had an error with startproject not executing but there was a
> > random issue with the name of my file. At this point I have no idea
> > what the problem is.
> >
> > http://madtrak.com/error.png
>
> Hi there,
>
>  you are missing the django-admin.py filename on your path. It ends
> with "...\django\bin" which is a directory name, not a file name.
>
>  HTH
>
>Jirka
>
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>

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Re: Unable to display static content.

[Jisson Varghese]

use {{STATIC_URL}} in place of {{MEDIA_URL}} and keep STATIC_ROOT =' ' in
settings page.

refer : https://docs.djangoproject.com/en/dev/howto/static-files/

On Sat, Dec 31, 2011 at 7:42 AM, Chirdeep  wrote:

> Hi All,
>
> I am just learning Python and Django. I am able to see the webpage but
> css and images are not picked up.
>
> Configuration as below:
>
> Linux Ubuntu 11.04
> Python 2.7.2
> Django 1.3.1
>
> I have setup Django using VirtualEnv. I am using PyCharm and my Django
> project is pointing to the VirtualEnv Django installation.
>
> In firebug, I am getting 404 for css and images.
>
> Project Structure.
>
> ProjectRoot
> -media
>   -images
>   -stylesheets
> -templates
> -webapp
>
> urls.py
>
> --
> from django.conf.urls.defaults import patterns, include, url
> import settings
> from talenthunt.web import views
>
> urlpatterns = patterns('',
>url(r'^search-form/$', views.search_form),
>url(r'^search/$', views.search),
> )
>
> if settings.DEBUG:
>urlpatterns += patterns('',
>(r'^media/(?P.*)$', 'django.views.static.serve', {
>'document_root': settings.MEDIA_ROOT}))
>
>
> settings.py
>
> ---
> def rel(*x):
>return os.path.join(os.path.abspath(os.path.dirname(__file__)),
> *x )
>
> MEDIA_ROOT = rel('media')
> MEDIA_URL = '/media/'
>
> STATIC_ROOT = rel('static')
> STATIC_URL = '/static/'
>
> ADMIN_MEDIA_PREFIX = '/media/admin/'
>
> Only pasting relevant code from settings.py
>
> Base.html
>
> --
> 
>
>Organic Web Design
> rel="stylesheet" type="text/css" />
> 
>
> Any help will be much appreciated.
>
> Thanks
> Chirdeep
>
>
>
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Re: Creating websites like Amazon/Ebay using Django

[Jisson Varghese]

well Django is suitable for web application development.
Django uses Python for serverside
Mysql is a good choice as Database.In a web app database stores user
credentials,sessions,and items,its price(in your case).
I suggest SQlalchemy (ORM).
first try with djnago orm (models),then shift to sqlalchemy.
learn basics of Html,javascript,ajax,jquery,I recommand
www.w3schools.com(for a beginner).

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Re: static file problem with modwsgi+ apache2 with django1.3

[Jisson Varghese]

@ Ramiro Morales Thank you for your response, *edit the configuration file
as you suggested ,But still am facing the problem.*
I have one doubt about the configuration
I used collectstatic command for static files,
STATIC_ROOT =
'/home/jisson/Desktop/testcloud.aws/DjangoApis/teststaticfiles/'
 STATIC_URL = '/static/'

Whether I add static or teststaticfiles in the last of following line now
am added  'static'

 Alias /static/ /home/jisson/Desktop/testcloud.aws/DjangoApis/static/


teststaticfiles - is the directory in my project where collect static
command collects and save all of my static contents.

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Re: Template Renderer safe if used with URL parameters?

[Jisson Varghese]

@Mathew ,am sorry i don't know is it safe or not,Its the one of the
question I wished to ask to some one.I think most of the applications use
ajax get methods ,since its faster.

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Re: custom table for django authentication possible

[Jisson Varghese]

I want to do this since,The project I am handling(my first web project) is a
mobile version of a project ,there is already a user table in our
serverside.So avoid redundancy ,am not able to create a new table for users.

On Thu, Oct 13, 2011 at 8:11 PM, Benedict Verheyen <
benedict.verhe...@gmail.com> wrote:

> On 13/10/2011 13:15, Jiss wrote:
> > I am new to django. Can I use my own table (say) 'User' instead of
> > 'auth_user' table (keeeping all other tables for django
> > authentication ) ?.
> >
>
> Why would you want to do that?
> Keep everything standard and put the fields you want in a UserProfile
> of your own where you store the extra information.
> See the django doc:
>
> https://docs.djangoproject.com/en/dev/topics/auth/#storing-additional-information-about-users
>
> Cheers,
> Benedict
>
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