author | Mario Ferraro <fadinlight@gmail.com> |
Sun, 15 Nov 2009 22:12:20 +0100 | |
changeset 3093 | d1be59b6b627 |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
323
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
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1 |
import re |
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2 |
import time |
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3 |
import datetime |
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4 |
|
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5 |
from django import forms |
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6 |
from django.forms.util import ErrorDict |
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7 |
from django.conf import settings |
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8 |
from django.http import Http404 |
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9 |
from django.contrib.contenttypes.models import ContentType |
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10 |
from models import Comment |
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11 |
from django.utils.encoding import force_unicode |
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12 |
from django.utils.hashcompat import sha_constructor |
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13 |
from django.utils.text import get_text_list |
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14 |
from django.utils.translation import ungettext, ugettext_lazy as _ |
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15 |
|
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16 |
COMMENT_MAX_LENGTH = getattr(settings,'COMMENT_MAX_LENGTH', 3000) |
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17 |
|
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18 |
class CommentForm(forms.Form): |
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19 |
name = forms.CharField(label=_("Name"), max_length=50) |
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20 |
email = forms.EmailField(label=_("Email address")) |
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21 |
url = forms.URLField(label=_("URL"), required=False) |
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22 |
comment = forms.CharField(label=_('Comment'), widget=forms.Textarea, |
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max_length=COMMENT_MAX_LENGTH) |
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24 |
honeypot = forms.CharField(required=False, |
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25 |
label=_('If you enter anything in this field '\ |
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26 |
'your comment will be treated as spam')) |
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27 |
content_type = forms.CharField(widget=forms.HiddenInput) |
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object_pk = forms.CharField(widget=forms.HiddenInput) |
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timestamp = forms.IntegerField(widget=forms.HiddenInput) |
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30 |
security_hash = forms.CharField(min_length=40, max_length=40, widget=forms.HiddenInput) |
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31 |
|
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32 |
def __init__(self, target_object, data=None, initial=None): |
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self.target_object = target_object |
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if initial is None: |
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initial = {} |
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initial.update(self.generate_security_data()) |
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37 |
super(CommentForm, self).__init__(data=data, initial=initial) |
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38 |
|
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39 |
def get_comment_object(self): |
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40 |
""" |
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41 |
Return a new (unsaved) comment object based on the information in this |
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42 |
form. Assumes that the form is already validated and will throw a |
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ValueError if not. |
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44 |
|
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45 |
Does not set any of the fields that would come from a Request object |
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46 |
(i.e. ``user`` or ``ip_address``). |
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47 |
""" |
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48 |
if not self.is_valid(): |
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49 |
raise ValueError("get_comment_object may only be called on valid forms") |
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50 |
|
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51 |
new = Comment( |
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52 |
content_type = ContentType.objects.get_for_model(self.target_object), |
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53 |
object_pk = force_unicode(self.target_object._get_pk_val()), |
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54 |
user_name = self.cleaned_data["name"], |
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55 |
user_email = self.cleaned_data["email"], |
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56 |
user_url = self.cleaned_data["url"], |
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57 |
comment = self.cleaned_data["comment"], |
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58 |
submit_date = datetime.datetime.now(), |
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59 |
site_id = settings.SITE_ID, |
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60 |
is_public = True, |
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61 |
is_removed = False, |
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62 |
) |
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63 |
|
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64 |
# Check that this comment isn't duplicate. (Sometimes people post comments |
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65 |
# twice by mistake.) If it is, fail silently by returning the old comment. |
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66 |
possible_duplicates = Comment.objects.filter( |
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67 |
content_type = new.content_type, |
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68 |
object_pk = new.object_pk, |
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69 |
user_name = new.user_name, |
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70 |
user_email = new.user_email, |
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71 |
user_url = new.user_url, |
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72 |
) |
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73 |
for old in possible_duplicates: |
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74 |
if old.submit_date.date() == new.submit_date.date() and old.comment == new.comment: |
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75 |
return old |
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76 |
|
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77 |
return new |
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78 |
|
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79 |
def security_errors(self): |
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80 |
"""Return just those errors associated with security""" |
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81 |
errors = ErrorDict() |
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82 |
for f in ["honeypot", "timestamp", "security_hash"]: |
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83 |
if f in self.errors: |
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84 |
errors[f] = self.errors[f] |
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85 |
return errors |
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86 |
|
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87 |
def clean_honeypot(self): |
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88 |
"""Check that nothing's been entered into the honeypot.""" |
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89 |
value = self.cleaned_data["honeypot"] |
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if value: |
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91 |
raise forms.ValidationError(self.fields["honeypot"].label) |
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92 |
return value |
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93 |
|
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94 |
def clean_security_hash(self): |
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95 |
"""Check the security hash.""" |
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96 |
security_hash_dict = { |
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97 |
'content_type' : self.data.get("content_type", ""), |
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98 |
'object_pk' : self.data.get("object_pk", ""), |
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99 |
'timestamp' : self.data.get("timestamp", ""), |
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100 |
} |
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101 |
expected_hash = self.generate_security_hash(**security_hash_dict) |
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102 |
actual_hash = self.cleaned_data["security_hash"] |
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103 |
if expected_hash != actual_hash: |
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104 |
raise forms.ValidationError("Security hash check failed.") |
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105 |
return actual_hash |
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106 |
|
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107 |
def clean_timestamp(self): |
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108 |
"""Make sure the timestamp isn't too far (> 2 hours) in the past.""" |
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109 |
ts = self.cleaned_data["timestamp"] |
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110 |
if time.time() - ts > (2 * 60 * 60): |
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111 |
raise forms.ValidationError("Timestamp check failed") |
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112 |
return ts |
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113 |
|
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114 |
def clean_comment(self): |
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115 |
""" |
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116 |
If COMMENTS_ALLOW_PROFANITIES is False, check that the comment doesn't |
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117 |
contain anything in PROFANITIES_LIST. |
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118 |
""" |
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119 |
comment = self.cleaned_data["comment"] |
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120 |
if settings.COMMENTS_ALLOW_PROFANITIES == False: |
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121 |
bad_words = [w for w in settings.PROFANITIES_LIST if w in comment.lower()] |
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122 |
if bad_words: |
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123 |
plural = len(bad_words) > 1 |
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124 |
raise forms.ValidationError(ungettext( |
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125 |
"Watch your mouth! The word %s is not allowed here.", |
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126 |
"Watch your mouth! The words %s are not allowed here.", plural) % \ |
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127 |
get_text_list(['"%s%s%s"' % (i[0], '-'*(len(i)-2), i[-1]) for i in bad_words], 'and')) |
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128 |
return comment |
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129 |
|
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130 |
def generate_security_data(self): |
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131 |
"""Generate a dict of security data for "initial" data.""" |
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132 |
timestamp = int(time.time()) |
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133 |
security_dict = { |
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134 |
'content_type' : str(self.target_object._meta), |
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135 |
'object_pk' : str(self.target_object._get_pk_val()), |
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136 |
'timestamp' : str(timestamp), |
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137 |
'security_hash' : self.initial_security_hash(timestamp), |
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138 |
} |
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139 |
return security_dict |
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140 |
|
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|
141 |
def initial_security_hash(self, timestamp): |
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142 |
""" |
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143 |
Generate the initial security hash from self.content_object |
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144 |
and a (unix) timestamp. |
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145 |
""" |
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146 |
|
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|
147 |
initial_security_dict = { |
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148 |
'content_type' : str(self.target_object._meta), |
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|
149 |
'object_pk' : str(self.target_object._get_pk_val()), |
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150 |
'timestamp' : str(timestamp), |
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|
151 |
} |
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152 |
return self.generate_security_hash(**initial_security_dict) |
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153 |
|
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|
154 |
def generate_security_hash(self, content_type, object_pk, timestamp): |
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155 |
"""Generate a (SHA1) security hash from the provided info.""" |
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|
156 |
info = (content_type, object_pk, timestamp, settings.SECRET_KEY) |
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|
157 |
return sha_constructor("".join(info)).hexdigest() |