Need to develop a project for file uploading and generating its(files's) URL, which could be shared. Are there any particular libraries or simple means in Python,(Django) that would be handy and efficient.?
~ Newbie trying a Herculean Task~ Thanks in Advance :)
Much of this is done for you in the Django-backed version of this excellent JQuery file upload app.
Try out a demo of the original here.
No. Since the Storage used may not even save the actual files on the filesystem, there is no universal way to generate a URL to them. You will need to create a view that gets passed a key that it can use to identify the record that has the file field, then you will need to respond with the file contents yourself.
Related
Okay so I know there are already some questions about this topic but I don't find any to be specific enough. I want to have a script on my site that will automatically generate my sitemap.xml (or save it somewhere). I know how to upload files and have my site set up on http://sean-behan.appspot.com with Python 2.7. How do I setup the script that will generate the sitemap and if possible please reference the code. Just ask if you need more info. :) Thanks.
You can have outside services automatically generate them for you by traversing your site.
One such service is at http://www.xml-sitemaps.com/details-sean-behan.appspot.com.html
Alternatively, you can serve your own xml file based on the URL's you want to appear in your site. In which case, see Tim Hoffman's answer.
I can't point you to code, as I don't know how your site is structured or what templating env you use, does your site structure include static pages etc...
The basics are if you have code that can pull together a list of dictionaries that contain the metadata about each page you want in your sitemap then you are half way there.
The use a templating language (or straight python ) that generates an xml file as per sitemap.org spec.
Now you have two choices, dynamically serve this output as requested, or store it in the datastore if when compressed it is less than 1MB, or write it to google cloud storage, then server it's contents when /sitemap.xml is requested. You will then set up a cron task to regenerate your cached sitemap once a day (or whatever frequency is appropriate).
I want users to be able to create the report template in Microsoft Word, I'll then probably add document fields. Then the script evaluates a number of things adds the appropriate text to the fields then creates a pdf of the filled in form.
So which modules would be best for this? I've looked at reportlab but I need to work from a pre-generated template and that doesn't seem feasible.
If you will use it only under Windows, having Word installed you could use PyWin32 that lets you access the api of the suite. You could also try IronPython as suggested here.
If you need to read a docx template regardless of the platform you could try this outdated extension.
If it suits your application to use a cloud service to populate Doc/DocX files there is a commercial system called Docmosis that can popluate plain-text (or merge) fields and stream back populated PDF documents to your Python system, or deliver via email etc.
You would upload your "template" Doc files to Docmosis via the Website (or api calls) then invoke Docmosis using a https post from your Python code.
Please note I work for the company that created Docmosis.
Hope that helps.
There is a need to add some kind of an upload progress dialog to my application. I know there are plenty of Flash/Java/HTML5 solutions for that, however they are not suitable in my case.
Flask documentation gives "an easier solution" offering Flask-Uploads extension. However I haven't found any kind of solution for my question there.
Is there any possibility to get the status of uploading file (i.e. number of bytes already uploaded)?
In fact, I know that Flask accumulates the file data in memory if file size is not big. Otherwise, it stores the file in the temporary folder. If there are no options of getting the number of received bytes, maybe there are ways of getting the temp filename at least?
Any kind of tricks are very welcome.
Thanks for help!
I don't think it is related to Flask
Please see this link:
Upload to Django with progress bar using Ajax and jQuery Laurent Luce's Blog
I think these are be helpful
request.META['REMOTE_ADDR'], request.GET['X-Progress-ID']
I've yet to test it but I found a link to something similar here
You can upload an individual file with the Admin site. However I have a need to upload at least 1 file, but potentially multiple files, for each object. Sometimes there will be sub-directories with these files that must also be uploaded.
Is there a good way to do this in the Admin site? Or would you recommend simply sftp-ing the files across and storing the path to them?
Thank you for your help.
I've only very recently starting working with Django, so do not yet know all the cool features I could be using :-)
Maybe have a look at https://github.com/stefanfoulis/django-filer, it allows multiple files to be uploaded at once.
I want to serve images in a web-app using sessions such that the links to the images expire once the session has expired.
If I show the actual links to the filesystem store of the images, say http://www.mywebapp.com/images/foo1.jpg this clearly makes stopping future requests for the image (one the user has signed out of the session) difficult to stop. Which is why I was considering placing the images in a sqlite db, and serving them from there.
It seems that using the db for image storage is considered bad practice (though apparently the GAE blob store seems to provide this functionality), so i was trying to figure out what the alternatives would be.
1)
Perhaps I do somesort of url-re-writing like so:
http://www.mywebapp.com/images/[session_id]/foo1.jpg
Thinking of using nginx, but it seems (on a first look) that this will require some hackin to accomplish?
2)
Copy the files to a physical directory on the filesystem and delete when the session expires. this seems quite messy though?
Are there any standard methods of accomplishing this dynamic image url thing?
I'm using web.py - if that helps.
Many thanks!
lighty's mod_secdownload has worked well for me to solve this issue. You can read more about it at http://redmine.lighttpd.net/wiki/1/Docs:ModSecDownload
The lighttpd wiki also has a generic article about your problem: http://redmine.lighttpd.net/wiki/1/HowToFightDeepLinking
Why so complicated?
Serve the image under the name which the user supplied (i.e. http://www.mywebapp.com/images/foo1.jpg)
Save the images in a directory using a UUID as name.
Create a map of file names to UUIDs in the session.
In the handler for /images/ look up the real file name in the map. Return 404 if no such entry exists. Otherwise serve the image.
When the session is closed, delete all files from the map.
In a cron job, delete all images that are older than one day.
This way, several users can upload the same image (same name), images get deleted as soon as possible or by the cron job (if the server crashes or something like that).
A combination of your two ideas (copy to a dir, expire when session expires) could be generalized to creating a new dir (could be as simple as a symlink) every 15 minutes. When generating the new symlink, also remove the one that's an hour old by now. Always link to the newest name in your code.