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annotate rhodecode/lib/__init__.py @ 1494:8e76649f11ad beta

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fixes safe_str method - trye directly to encode with given encoding instead of trying to make a string out of the unicode
author Marcin Kuzminski <marcin@python-works.com>
date Thu, 29 Sep 2011 22:55:32 +0300
parents 76b358f81926
children a2efbfe84067
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # -*- coding: utf-8 -*-
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2 """
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3 rhodecode.lib.__init__
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4 ~~~~~~~~~~~~~~~~~~~~~~~
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5
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6 Some simple helper functions
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7
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8 :created_on: Jan 5, 2011
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9 :author: marcink
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10 :copyright: (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
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11 :license: GPLv3, see COPYING for more details.
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12 """
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13 # This program is free software: you can redistribute it and/or modify
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14 # it under the terms of the GNU General Public License as published by
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15 # the Free Software Foundation, either version 3 of the License, or
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16 # (at your option) any later version.
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17 #
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18 # This program is distributed in the hope that it will be useful,
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19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 # GNU General Public License for more details.
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22 #
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23 # You should have received a copy of the GNU General Public License
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24 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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26
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27 try:
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28 import json
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29 except ImportError:
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30 #python 2.5 compatibility
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31 import simplejson as json
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32
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33
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34 def __get_lem():
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35 from pygments import lexers
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36 from string import lower
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37 from collections import defaultdict
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38
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39 d = defaultdict(lambda: [])
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40
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41 def __clean(s):
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42 s = s.lstrip('*')
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43 s = s.lstrip('.')
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44
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45 if s.find('[') != -1:
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46 exts = []
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47 start, stop = s.find('['), s.find(']')
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48
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49 for suffix in s[start + 1:stop]:
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50 exts.append(s[:s.find('[')] + suffix)
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51 return map(lower, exts)
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52 else:
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53 return map(lower, [s])
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54
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55 for lx, t in sorted(lexers.LEXERS.items()):
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56 m = map(__clean, t[-2])
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57 if m:
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58 m = reduce(lambda x, y: x + y, m)
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59 for ext in m:
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60 desc = lx.replace('Lexer', '')
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61 d[ext].append(desc)
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62
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63 return dict(d)
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64
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65 # language map is also used by whoosh indexer, which for those specified
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66 # extensions will index it's content
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67 LANGUAGES_EXTENSIONS_MAP = __get_lem()
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68
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69 # Additional mappings that are not present in the pygments lexers
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70 # NOTE: that this will overide any mappings in LANGUAGES_EXTENSIONS_MAP
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71 ADDITIONAL_MAPPINGS = {'xaml': 'XAML'}
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72
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73 LANGUAGES_EXTENSIONS_MAP.update(ADDITIONAL_MAPPINGS)
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74
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75
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76 def str2bool(_str):
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77 """
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78 returs True/False value from given string, it tries to translate the
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79 string into boolean
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80
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81 :param _str: string value to translate into boolean
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82 :rtype: boolean
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83 :returns: boolean from given string
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84 """
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85 if _str is None:
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86 return False
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87 if _str in (True, False):
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88 return _str
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89 _str = str(_str).strip().lower()
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90 return _str in ('t', 'true', 'y', 'yes', 'on', '1')
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91
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92
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93 def convert_line_endings(line, mode):
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94 """
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95 Converts a given line "line end" accordingly to given mode
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96
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97 Available modes are::
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98 0 - Unix
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99 1 - Mac
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100 2 - DOS
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101
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102 :param line: given line to convert
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103 :param mode: mode to convert to
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104 :rtype: str
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105 :return: converted line according to mode
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106 """
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107 from string import replace
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108
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109 if mode == 0:
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110 line = replace(line, '\r\n', '\n')
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111 line = replace(line, '\r', '\n')
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112 elif mode == 1:
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113 line = replace(line, '\r\n', '\r')
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114 line = replace(line, '\n', '\r')
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115 elif mode == 2:
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116 import re
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117 line = re.sub("\r(?!\n)|(?<!\r)\n", "\r\n", line)
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118 return line
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120
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121 def detect_mode(line, default):
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122 """
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123 Detects line break for given line, if line break couldn't be found
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124 given default value is returned
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125
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126 :param line: str line
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127 :param default: default
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128 :rtype: int
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129 :return: value of line end on of 0 - Unix, 1 - Mac, 2 - DOS
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130 """
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131 if line.endswith('\r\n'):
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132 return 2
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133 elif line.endswith('\n'):
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134 return 0
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135 elif line.endswith('\r'):
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136 return 1
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137 else:
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138 return default
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139
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140
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141 def generate_api_key(username, salt=None):
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142 """
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143 Generates unique API key for given username, if salt is not given
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144 it'll be generated from some random string
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145
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146 :param username: username as string
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147 :param salt: salt to hash generate KEY
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148 :rtype: str
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149 :returns: sha1 hash from username+salt
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150 """
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151 from tempfile import _RandomNameSequence
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152 import hashlib
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153
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154 if salt is None:
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155 salt = _RandomNameSequence().next()
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156
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157 return hashlib.sha1(username + salt).hexdigest()
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158
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159
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160 def safe_unicode(str_, from_encoding='utf8'):
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161 """
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162 safe unicode function. Does few trick to turn str_ into unicode
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163
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164 In case of UnicodeDecode error we try to return it with encoding detected
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165 by chardet library if it fails fallback to unicode with errors replaced
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166
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167 :param str_: string to decode
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168 :rtype: unicode
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169 :returns: unicode object
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170 """
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171
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172 if isinstance(str_, unicode):
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173 return str_
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174
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175 try:
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176 return unicode(str_, from_encoding)
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177 except UnicodeDecodeError:
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178 pass
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179
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180 try:
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181 import chardet
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182 encoding = chardet.detect(str_)['encoding']
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183 if encoding is None:
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184 raise UnicodeDecodeError()
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185
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186 return str_.decode(encoding)
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187 except (ImportError, UnicodeDecodeError):
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188 return unicode(str_, from_encoding, 'replace')
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189
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190 def safe_str(unicode_, to_encoding='utf8'):
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191 """
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192 safe str function. Does few trick to turn unicode_ into string
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193
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194 In case of UnicodeEncodeError we try to return it with encoding detected
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195 by chardet library if it fails fallback to string with errors replaced
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196
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197 :param unicode_: unicode to encode
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198 :rtype: str
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199 :returns: str object
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200 """
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201
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202 if isinstance(unicode_, str):
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203 return unicode_
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204
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205 try:
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206 return unicode_.encode(to_encoding)
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207 except UnicodeEncodeError:
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208 pass
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209
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210 try:
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211 import chardet
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212 encoding = chardet.detect(unicode_)['encoding']
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213 print encoding
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214 if encoding is None:
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215 raise UnicodeEncodeError()
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216
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217 return unicode_.encode(encoding)
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218 except (ImportError, UnicodeEncodeError):
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219 return unicode_.encode(to_encoding, 'replace')
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220
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221 return safe_str
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222
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223
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224
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225 def engine_from_config(configuration, prefix='sqlalchemy.', **kwargs):
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226 """
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227 Custom engine_from_config functions that makes sure we use NullPool for
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228 file based sqlite databases. This prevents errors on sqlite. This only
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229 applies to sqlalchemy versions < 0.7.0
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230
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231 """
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232 import sqlalchemy
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233 from sqlalchemy import engine_from_config as efc
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234 import logging
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235
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236 if int(sqlalchemy.__version__.split('.')[1]) < 7:
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237
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238 # This solution should work for sqlalchemy < 0.7.0, and should use
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239 # proxy=TimerProxy() for execution time profiling
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240
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241 from sqlalchemy.pool import NullPool
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242 url = configuration[prefix + 'url']
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243
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244 if url.startswith('sqlite'):
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245 kwargs.update({'poolclass': NullPool})
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246 return efc(configuration, prefix, **kwargs)
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247 else:
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248 import time
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249 from sqlalchemy import event
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250 from sqlalchemy.engine import Engine
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251
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252 log = logging.getLogger('sqlalchemy.engine')
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253 BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = xrange(30, 38)
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254 engine = efc(configuration, prefix, **kwargs)
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255
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256 def color_sql(sql):
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257 COLOR_SEQ = "\033[1;%dm"
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258 COLOR_SQL = YELLOW
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259 normal = '\x1b[0m'
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260 return ''.join([COLOR_SEQ % COLOR_SQL, sql, normal])
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261
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262 if configuration['debug']:
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263 #attach events only for debug configuration
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264
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265 def before_cursor_execute(conn, cursor, statement,
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266 parameters, context, executemany):
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267 context._query_start_time = time.time()
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268 log.info(color_sql(">>>>> STARTING QUERY >>>>>"))
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269
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270
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271 def after_cursor_execute(conn, cursor, statement,
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272 parameters, context, executemany):
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273 total = time.time() - context._query_start_time
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274 log.info(color_sql("<<<<< TOTAL TIME: %f <<<<<" % total))
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275
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276 event.listen(engine, "before_cursor_execute",
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277 before_cursor_execute)
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278 event.listen(engine, "after_cursor_execute",
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279 after_cursor_execute)
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280
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281 return engine
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282
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283
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284 def age(curdate):
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285 """
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286 turns a datetime into an age string.
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287
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288 :param curdate: datetime object
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289 :rtype: unicode
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290 :returns: unicode words describing age
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291 """
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292
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293 from datetime import datetime
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294 from webhelpers.date import time_ago_in_words
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295
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296 _ = lambda s:s
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297
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298 if not curdate:
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299 return ''
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300
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301 agescales = [(_(u"year"), 3600 * 24 * 365),
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302 (_(u"month"), 3600 * 24 * 30),
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303 (_(u"day"), 3600 * 24),
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304 (_(u"hour"), 3600),
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305 (_(u"minute"), 60),
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306 (_(u"second"), 1), ]
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307
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308 age = datetime.now() - curdate
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309 age_seconds = (age.days * agescales[2][1]) + age.seconds
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310 pos = 1
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311 for scale in agescales:
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312 if scale[1] <= age_seconds:
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313 if pos == 6:pos = 5
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314 return '%s %s' % (time_ago_in_words(curdate,
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315 agescales[pos][0]), _('ago'))
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316 pos += 1
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317
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318 return _(u'just now')
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319
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320
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321 def uri_filter(uri):
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322 """
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323 Removes user:password from given url string
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324
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325 :param uri:
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326 :rtype: unicode
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327 :returns: filtered list of strings
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328 """
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329 if not uri:
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330 return ''
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331
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332 proto = ''
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333
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334 for pat in ('https://', 'http://'):
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335 if uri.startswith(pat):
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336 uri = uri[len(pat):]
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337 proto = pat
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338 break
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339
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340 # remove passwords and username
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341 uri = uri[uri.find('@') + 1:]
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342
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343 # get the port
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344 cred_pos = uri.find(':')
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345 if cred_pos == -1:
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346 host, port = uri, None
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347 else:
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348 host, port = uri[:cred_pos], uri[cred_pos + 1:]
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349
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350 return filter(None, [proto, host, port])
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351
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352
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353 def credentials_filter(uri):
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354 """
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355 Returns a url with removed credentials
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356
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357 :param uri:
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358 """
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359
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360 uri = uri_filter(uri)
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361 #check if we have port
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362 if len(uri) > 2 and uri[2]:
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363 uri[2] = ':' + uri[2]
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364
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365 return ''.join(uri)
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366
1466
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367 def get_changeset_safe(repo, rev):
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368 """
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369 Safe version of get_changeset if this changeset doesn't exists for a
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370 repo it returns a Dummy one instead
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371
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372 :param repo:
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373 :param rev:
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374 """
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375 from vcs.backends.base import BaseRepository
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376 from vcs.exceptions import RepositoryError
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377 if not isinstance(repo, BaseRepository):
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378 raise Exception('You must pass an Repository '
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379 'object as first argument got %s', type(repo))
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380
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381 try:
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382 cs = repo.get_changeset(rev)
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383 except RepositoryError:
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384 from rhodecode.lib.utils import EmptyChangeset
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385 cs = EmptyChangeset(requested_revision=rev)
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386 return cs