Mercurial > libervia-web

annotate browser_side/file_tools.py @ 384:8bb9c878b7e3

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README update
author Goffi <goffi@goffi.org>
date Wed, 26 Feb 2014 14:00:07 +0100
parents 30d03d9f07e4
children 933bce4cb816
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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4 # Libervia: a Salut à Toi frontend
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5 # Copyright (C) 2011, 2012, 2013, 2014 Jérôme Poisson <goffi@goffi.org>
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 from pyjamas.ui.FileUpload import FileUpload
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21 from pyjamas import Window
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22 from pyjamas import DOM
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25 class FilterFileUpload(FileUpload):
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27 def __init__(self, name, max_size, types=None):
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28 """
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29 @param name: the input element name
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30 @param max_size: maximum file size in MB
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31 @param types: allowed types as a list of couples (x, y, z):
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32 - x: MIME content type e.g. "audio/ogg"
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33 - y: file extension e.g. "*.ogg"
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34 - z: description for the user e.g. "Ogg Vorbis Audio"
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35 If types is None, all file format are accepted
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36 """
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37 FileUpload.__init__(self)
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38 self.setName(name)
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39 while DOM.getElementById(name):
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40 name = "%s_" % name
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41 self.setID(name)
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42 self._id = name
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43 self.max_size = max_size
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44 self.types = types
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46 def getFileInfo(self):
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47 from __pyjamas__ import JS
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48 JS("var file = top.document.getElementById(this._id).files[0]; return [file.size, file.type]")
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50 def check(self):
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51 if self.getFilename() == "":
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52 return False
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53 (size, filetype) = self.getFileInfo()
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54 if self.types and filetype not in [x for (x, y, z) in self.types]:
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55 types = ["- %s (%s)" % (z, y) for (x, y, z) in self.types]
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56 Window.alert('This file type is not accepted.\nAccepted file types are:\n\n%s' % "\n".join(types))
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57 return False
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58 if size > self.max_size * pow(2, 20):
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59 Window.alert('This file is too big!\nMaximum file size: %d MB.' % self.max_size)
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60 return False
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61 return True