Dear Paul,
Thank you for the fast and useful reply. However, I have two questions.
According to django documentation, HttpResponse accepts string
parameter. Does it also accept binary data. I am using python3 in which
string is a unicode string and binary data are stored in bytes class.
Second, I am planning to use ezodf library to create odt files. It
appears that there is no way I can access data from memory in this
library. do you know of any good python library that can create and
modify odt files?
Thank you
على الإثنين 21 تـمـوز 2014 18:49, كتب Paul J Stevens:
On 21-07-14 17:09, alghafli wrote:
I want to dynamically create a temporary odt file and upload it to the
client. The file is dynamically created based on GET request parameters.
It basically searches the database and fills the odt file with
information. This file is temporary and should be deleted after the
upload finishes.
tempfile.TemporaryFile is what you seem to want. The file object is
deleted automatically.
fd = tempfile.TemporaryFile()
fd.write(odt_data)
fd.seek(0)
return HttpResponse(
fd.read(),
content_type='application/vnd.oasis.opendocument.text'
)
But then you might as well skip the tempfile feature, and stream
directly from memory:
return HttpResponse(
odt_data,
content_type='application/vnd.oasis.opendocument.text'
)
Here is how I am planning to do it. The view function creates the file
and fills it with information. The file is created in a directory which
is added to the STATICFILES_DIRS. The view then redirects to the file
url and the client downloads the file.
Since your odt data is for one-time-only usage, you don't need to put
them in any kind of STATIC_FILES directory. That feature is of use to
offload download performance to the web-server, but for one-time-only
downloads there is no point.
To delete the files, I am planning to create a class that handles
temporary file creation and deletion. The class forces an upper limit to
temporary files number, say 10. Any file created after 10 files will
make the class delete older files based on modification time. I might as
well create a thread that would delete files regularly but it would be a
bit more complicated and unnecessary for this specific project.
Done already by the tempfile.TemporaryFile class, and totally redundant
when streaming from memory.
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