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upload handler decorators

Author:
Rozza
Posted:
July 11, 2008
Language:
Python
Version:
.96
Score:
0 (after 0 ratings)

In an admin custom view I had the requirement to modify the upload handlers.

However, the @staff_member_required locked the Files upload handlers as it uses the request.POST - see Ticket 7654.

These decorators can be used before other decorators to allow setting of the upload handlers.

Usage example:

@upload_handlers_insert(0, QuotaUploadHandler)
@staff_member_required
def upload(request):
   pass

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def upload_handlers_insert(position, handler):
    """
    Decorator that allows you to insert an upload_handler
    Used in when other deocrators lock the handlers ie. @staff_member_required decorator
    """
    def _decorator(view_func):
        def _upload_handlers_insert_func(request, *args, **kwargs):
            request.upload_handlers.insert(position, handler())
            return view_func(request, *args, **kwargs)

        _upload_handlers_insert_func.__doc__ = view_func.__doc__
        _upload_handlers_insert_func.__dict__ = view_func.__dict__
        return _upload_handlers_insert_func

    return _decorator

def upload_handlers_append(handler):
    """
    Decorator that allows you to append an upload_handler
    Used in when other deocrators lock the handlers ie. @staff_member_required decorator
    """
    def _decorator(view_func):
        def _upload_handlers_append_func(request, *args, **kwargs):
            request.upload_handlers.append(handler())

            return view_func(request, *args, **kwargs)

        _upload_handlers_append_func.__doc__ = view_func.__doc__
        _upload_handlers_append_func.__dict__ = view_func.__dict__
        return _upload_handlers_insert_func

    return _decorator

def upload_handlers(handlers):
    """
    Decorator that allows you to set the upload_handlers
    Used in when other deocrators lock the handlers ie. @staff_member_required decorator
    """
    def _decorator(view_func):
        def _upload_handlers_func(request, *args, **kwargs):
            upload_handlers = []
            for handler in handlers:
                upload_handlers.append(handler())
            request.upload_handlers = handlers

            return view_func(request, *args, **kwargs)

        _upload_handlers_func.__doc__ = view_func.__doc__
        _upload_handlers_func.__dict__ = view_func.__dict__
        return _upload_handlers_insert_func

    return _decorator

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Comments

Rozza (on July 14, 2008):

Edited - should pass uninitiated class to the decorator - it will then handle the initiation and will return a fresh instance per request.

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