Mercurial > hg > agora-ahsan

annotate apps/snippet/forms.py @ 135:f299232c82e8

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Perform basic validation on snippet file uploads To prevent users from uploading binary files. This is not a complete fix.
author dellsystem <ilostwaldo@gmail.com>
date Sat, 22 Sep 2012 12:39:37 -0400
parents ba51d3b7740b
children c7be7def8b57
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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ab608f27ecd5 Copy preliminary django-paste code for snippets along with mptt. Works clunkily. Still need to adapt it for Agora.
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1 from django import forms
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2 from django.conf import settings
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3 from django.utils.translation import ugettext_lazy as _
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4 from agora.apps.snippet.models import Snippet
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5 from agora.apps.snippet.highlight import LEXER_LIST_ALL, LEXER_LIST, LEXER_DEFAULT
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6 import datetime
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7
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8 #===============================================================================
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9 # Snippet Form and Handling
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10 #===============================================================================
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12 EXPIRE_CHOICES = (
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13 (3600, _(u'In one hour')),
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14 (3600*24*7, _(u'In one week')),
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15 (3600*24*30, _(u'In one month')),
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16 (3600*24*30*12*100, _(u'Save forever')), # 100 years, I call it forever ;)
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17 )
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19 EXPIRE_DEFAULT = 3600*24*30
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21 class SnippetForm(forms.ModelForm):
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22 file = forms.FileField(help_text=_("If the snippet you want to post is \
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23 saved as a file on your computer, you can upload it directly rather \
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24 than having to copy and paste it into the box above. If a file \
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25 is specified, the text in the content field above will be \
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26 ignored."),
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27 required=False)
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29 expire_options = forms.ChoiceField(
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30 choices=EXPIRE_CHOICES,
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31 initial=EXPIRE_DEFAULT,
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32 label=_(u'Expires'),
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33 )
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34
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35 def __init__(self, *args, **kwargs):
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36 request = kwargs.pop('request')
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37 super(SnippetForm, self).__init__(*args, **kwargs)
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38 self.request = request
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39
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40 try:
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41 if self.request.session['userprefs'].get('display_all_lexer',
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42 False):
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43 self.fields['lexer'].choices = LEXER_LIST_ALL
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44 except KeyError:
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45 pass
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47 try:
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48 self.fields['author'].initial = \
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49 self.request.session['userprefs'].get('default_name', '')
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50 except KeyError:
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51 pass
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52
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53 # Make the content field not required (validated in clean())
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54 self.fields['content'].required = False
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55 self.fields['title'].required = True
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56
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57 def clean(self):
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58 cleaned_data = super(SnippetForm, self).clean()
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59 file_data = cleaned_data.get('file')
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60 content = cleaned_data.get('content')
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61
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62 if file_data:
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63 file_data.open()
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64 content_type = file_data.content_type
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65
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66 # Do some very basic checking of types. NOT SECURE.
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67 if (content_type.startswith('text/') or
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68 content_type.startswith('application')):
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69 cleaned_data['content'] = file_data.read()
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70 else:
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71 raise forms.ValidationError(_("Please ensure that you upload \
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72 a text file."))
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73 elif not content:
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74 # No snippet data specified
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75 raise forms.ValidationError(_("Please specify some content for \
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76 the snippet, either in the content field or by uploading \
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77 a file."))
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78
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79 return cleaned_data
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80
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81 def save(self, parent=None, *args, **kwargs):
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83 # Set parent snippet
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84 if parent:
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85 self.instance.parent = parent
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86
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87 # Add expire datestamp
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88 self.instance.expires = datetime.datetime.now() + \
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89 datetime.timedelta(seconds=int(self.cleaned_data['expire_options']))
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90
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91 # Save snippet in the db
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92 super(SnippetForm, self).save(*args, **kwargs)
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93
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94 # Add the snippet to the user session list
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95 if self.request.session.get('snippet_list', False):
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96 if len(self.request.session['snippet_list']) >= \
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97 getattr(settings, 'MAX_SNIPPETS_PER_USER', 10):
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98 self.request.session['snippet_list'].pop(0)
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99 self.request.session['snippet_list'] += [self.instance.pk]
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100 else:
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101 self.request.session['snippet_list'] = [self.instance.pk]
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102
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103 return self.request, self.instance
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104
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105 class Meta:
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106 model = Snippet
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107 fields = (
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108 'title',
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109 'content',
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110 'lexer',
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111 )
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114 #===============================================================================
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115 # User Settings
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116 #===============================================================================
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117
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118 USERPREFS_FONT_CHOICES = [(None, _(u'Default'))] + [
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119 (i, i) for i in sorted((
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120 'Monaco',
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121 'Bitstream Vera Sans Mono',
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122 'Courier New',
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123 'Consolas',
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124 ))
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125 ]
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126
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127 USERPREFS_SIZES = [(None, _(u'Default'))] + [(i, '%dpx' % i) for i in range(5, 25)]
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128
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129 class UserSettingsForm(forms.Form):
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130
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131 default_name = forms.CharField(label=_(u'Default Name'), required=False)
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132 display_all_lexer = forms.BooleanField(
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133 label=_(u'Display all lexer'),
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134 required=False,
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135 widget=forms.CheckboxInput,
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136 help_text=_(u'This also enables the super secret ' \
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137 '\'guess lexer\' function.'),
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138 )
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139 font_family = forms.ChoiceField(label=_(u'Font Family'),
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140 required=False,
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141 choices=USERPREFS_FONT_CHOICES)
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142 font_size = forms.ChoiceField(label=_(u'Font Size'),
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143 required=False,
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144 choices=USERPREFS_SIZES)
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145 line_height = forms.ChoiceField(label=_(u'Line Height'),
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146 required=False,
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147 choices=USERPREFS_SIZES)