annotate Lib/email/_parseaddr.py @ 27998:e27f58a50737 legacy-trunk

SF bug #690377: Dud footnote reference in distutils docs
author Raymond Hettinger <python@rcn.com>
date Fri, 21 Feb 2003 02:47:09 +0000
parents 2ce8cf284b15
children 023d3b50e597
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1 # Copyright (C) 2002 Python Software Foundation
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2
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3 """Email address parsing code.
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4
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5 Lifted directly from rfc822.py. This should eventually be rewritten.
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6 """
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7
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8 import time
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9 from types import TupleType
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10
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11 try:
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12 True, False
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13 except NameError:
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14 True = 1
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15 False = 0
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16
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17 SPACE = ' '
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18 EMPTYSTRING = ''
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19 COMMASPACE = ', '
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20
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21 # Parse a date field
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22 _monthnames = ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul',
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23 'aug', 'sep', 'oct', 'nov', 'dec',
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24 'january', 'february', 'march', 'april', 'may', 'june', 'july',
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25 'august', 'september', 'october', 'november', 'december']
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26
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27 _daynames = ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun']
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28
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29 # The timezone table does not include the military time zones defined
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30 # in RFC822, other than Z. According to RFC1123, the description in
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31 # RFC822 gets the signs wrong, so we can't rely on any such time
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32 # zones. RFC1123 recommends that numeric timezone indicators be used
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33 # instead of timezone names.
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34
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35 _timezones = {'UT':0, 'UTC':0, 'GMT':0, 'Z':0,
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36 'AST': -400, 'ADT': -300, # Atlantic (used in Canada)
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37 'EST': -500, 'EDT': -400, # Eastern
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38 'CST': -600, 'CDT': -500, # Central
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39 'MST': -700, 'MDT': -600, # Mountain
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40 'PST': -800, 'PDT': -700 # Pacific
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41 }
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42
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43
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44 def parsedate_tz(data):
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45 """Convert a date string to a time tuple.
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46
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47 Accounts for military timezones.
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48 """
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49 data = data.split()
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50 # The FWS after the comma after the day-of-week is optional, so search and
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51 # adjust for this.
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52 if data[0].endswith(',') or data[0].lower() in _daynames:
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53 # There's a dayname here. Skip it
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54 del data[0]
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55 else:
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56 i = data[0].rfind(',')
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57 if i < 0:
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58 return None
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59 data[0] = data[0][i+1:]
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60 if len(data) == 3: # RFC 850 date, deprecated
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61 stuff = data[0].split('-')
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62 if len(stuff) == 3:
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63 data = stuff + data[1:]
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64 if len(data) == 4:
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65 s = data[3]
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66 i = s.find('+')
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67 if i > 0:
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68 data[3:] = [s[:i], s[i+1:]]
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69 else:
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70 data.append('') # Dummy tz
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71 if len(data) < 5:
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72 return None
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73 data = data[:5]
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74 [dd, mm, yy, tm, tz] = data
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75 mm = mm.lower()
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76 if mm not in _monthnames:
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77 dd, mm = mm, dd.lower()
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78 if mm not in _monthnames:
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79 return None
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80 mm = _monthnames.index(mm) + 1
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81 if mm > 12:
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82 mm -= 12
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83 if dd[-1] == ',':
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84 dd = dd[:-1]
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85 i = yy.find(':')
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86 if i > 0:
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87 yy, tm = tm, yy
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88 if yy[-1] == ',':
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89 yy = yy[:-1]
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90 if not yy[0].isdigit():
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91 yy, tz = tz, yy
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92 if tm[-1] == ',':
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93 tm = tm[:-1]
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94 tm = tm.split(':')
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95 if len(tm) == 2:
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96 [thh, tmm] = tm
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97 tss = '0'
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98 elif len(tm) == 3:
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99 [thh, tmm, tss] = tm
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100 else:
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101 return None
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102 try:
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103 yy = int(yy)
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104 dd = int(dd)
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105 thh = int(thh)
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106 tmm = int(tmm)
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107 tss = int(tss)
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108 except ValueError:
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109 return None
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110 tzoffset = None
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111 tz = tz.upper()
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112 if _timezones.has_key(tz):
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113 tzoffset = _timezones[tz]
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114 else:
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115 try:
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116 tzoffset = int(tz)
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117 except ValueError:
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118 pass
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119 # Convert a timezone offset into seconds ; -0500 -> -18000
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120 if tzoffset:
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121 if tzoffset < 0:
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122 tzsign = -1
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123 tzoffset = -tzoffset
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124 else:
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125 tzsign = 1
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126 tzoffset = tzsign * ( (tzoffset/100)*3600 + (tzoffset % 100)*60)
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127 tuple = (yy, mm, dd, thh, tmm, tss, 0, 0, 0, tzoffset)
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128 return tuple
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129
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130
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131 def parsedate(data):
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132 """Convert a time string to a time tuple."""
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133 t = parsedate_tz(data)
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134 if isinstance(t, TupleType):
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135 return t[:9]
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136 else:
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137 return t
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138
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139
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140 def mktime_tz(data):
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141 """Turn a 10-tuple as returned by parsedate_tz() into a UTC timestamp."""
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142 if data[9] is None:
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143 # No zone info, so localtime is better assumption than GMT
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144 return time.mktime(data[:8] + (-1,))
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145 else:
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146 t = time.mktime(data[:8] + (0,))
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147 return t - data[9] - time.timezone
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148
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149
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150 def quote(str):
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151 """Add quotes around a string."""
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152 return str.replace('\\', '\\\\').replace('"', '\\"')
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153
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154
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155 class AddrlistClass:
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156 """Address parser class by Ben Escoto.
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157
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158 To understand what this class does, it helps to have a copy of RFC 2822 in
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159 front of you.
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160
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161 Note: this class interface is deprecated and may be removed in the future.
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162 Use rfc822.AddressList instead.
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163 """
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164
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165 def __init__(self, field):
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166 """Initialize a new instance.
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167
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168 `field' is an unparsed address header field, containing
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169 one or more addresses.
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170 """
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171 self.specials = '()<>@,:;.\"[]'
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172 self.pos = 0
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173 self.LWS = ' \t'
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174 self.CR = '\r\n'
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175 self.atomends = self.specials + self.LWS + self.CR
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176 # Note that RFC 2822 now specifies `.' as obs-phrase, meaning that it
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177 # is obsolete syntax. RFC 2822 requires that we recognize obsolete
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178 # syntax, so allow dots in phrases.
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179 self.phraseends = self.atomends.replace('.', '')
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180 self.field = field
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181 self.commentlist = []
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182
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183 def gotonext(self):
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184 """Parse up to the start of the next address."""
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185 while self.pos < len(self.field):
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parents:
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186 if self.field[self.pos] in self.LWS + '\n\r':
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187 self.pos += 1
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188 elif self.field[self.pos] == '(':
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189 self.commentlist.append(self.getcomment())
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190 else:
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191 break
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192
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193 def getaddrlist(self):
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194 """Parse all addresses.
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195
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196 Returns a list containing all of the addresses.
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197 """
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198 result = []
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199 while True:
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200 ad = self.getaddress()
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201 if ad:
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202 result += ad
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203 else:
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204 break
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205 return result
26046
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206
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207 def getaddress(self):
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208 """Parse the next address."""
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209 self.commentlist = []
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210 self.gotonext()
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211
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212 oldpos = self.pos
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213 oldcl = self.commentlist
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214 plist = self.getphraselist()
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215
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216 self.gotonext()
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217 returnlist = []
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218
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219 if self.pos >= len(self.field):
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220 # Bad email address technically, no domain.
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221 if plist:
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222 returnlist = [(SPACE.join(self.commentlist), plist[0])]
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223
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224 elif self.field[self.pos] in '.@':
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225 # email address is just an addrspec
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226 # this isn't very efficient since we start over
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227 self.pos = oldpos
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228 self.commentlist = oldcl
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229 addrspec = self.getaddrspec()
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230 returnlist = [(SPACE.join(self.commentlist), addrspec)]
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231
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232 elif self.field[self.pos] == ':':
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233 # address is a group
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234 returnlist = []
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235
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236 fieldlen = len(self.field)
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237 self.pos += 1
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238 while self.pos < len(self.field):
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239 self.gotonext()
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240 if self.pos < fieldlen and self.field[self.pos] == ';':
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241 self.pos += 1
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242 break
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243 returnlist = returnlist + self.getaddress()
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244
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245 elif self.field[self.pos] == '<':
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246 # Address is a phrase then a route addr
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247 routeaddr = self.getrouteaddr()
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248
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249 if self.commentlist:
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250 returnlist = [(SPACE.join(plist) + ' (' +
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251 ' '.join(self.commentlist) + ')', routeaddr)]
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252 else:
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253 returnlist = [(SPACE.join(plist), routeaddr)]
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254
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255 else:
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256 if plist:
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257 returnlist = [(SPACE.join(self.commentlist), plist[0])]
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258 elif self.field[self.pos] in self.specials:
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259 self.pos += 1
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260
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261 self.gotonext()
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262 if self.pos < len(self.field) and self.field[self.pos] == ',':
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263 self.pos += 1
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264 return returnlist
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265
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266 def getrouteaddr(self):
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267 """Parse a route address (Return-path value).
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268
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269 This method just skips all the route stuff and returns the addrspec.
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270 """
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271 if self.field[self.pos] != '<':
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272 return
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273
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274 expectroute = False
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275 self.pos += 1
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276 self.gotonext()
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277 adlist = ''
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278 while self.pos < len(self.field):
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279 if expectroute:
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280 self.getdomain()
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281 expectroute = False
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282 elif self.field[self.pos] == '>':
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283 self.pos += 1
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284 break
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285 elif self.field[self.pos] == '@':
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286 self.pos += 1
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287 expectroute = True
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288 elif self.field[self.pos] == ':':
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289 self.pos += 1
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290 else:
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291 adlist = self.getaddrspec()
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292 self.pos += 1
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293 break
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294 self.gotonext()
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295
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296 return adlist
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297
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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298 def getaddrspec(self):
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299 """Parse an RFC 2822 addr-spec."""
26046
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300 aslist = []
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301
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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302 self.gotonext()
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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303 while self.pos < len(self.field):
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
304 if self.field[self.pos] == '.':
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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305 aslist.append('.')
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306 self.pos += 1
26046
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307 elif self.field[self.pos] == '"':
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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308 aslist.append('"%s"' % self.getquote())
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
309 elif self.field[self.pos] in self.atomends:
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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310 break
26850
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311 else:
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diff changeset
312 aslist.append(self.getatom())
26046
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313 self.gotonext()
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
314
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
315 if self.pos >= len(self.field) or self.field[self.pos] != '@':
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diff changeset
316 return EMPTYSTRING.join(aslist)
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317
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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318 aslist.append('@')
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diff changeset
319 self.pos += 1
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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320 self.gotonext()
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diff changeset
321 return EMPTYSTRING.join(aslist) + self.getdomain()
26046
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322
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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323 def getdomain(self):
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
324 """Get the complete domain name from an address."""
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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325 sdlist = []
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326 while self.pos < len(self.field):
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
327 if self.field[self.pos] in self.LWS:
26850
803302573152 A code cleansing pass
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diff changeset
328 self.pos += 1
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
329 elif self.field[self.pos] == '(':
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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330 self.commentlist.append(self.getcomment())
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
331 elif self.field[self.pos] == '[':
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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332 sdlist.append(self.getdomainliteral())
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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333 elif self.field[self.pos] == '.':
26850
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334 self.pos += 1
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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335 sdlist.append('.')
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
336 elif self.field[self.pos] in self.atomends:
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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337 break
26850
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diff changeset
338 else:
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339 sdlist.append(self.getatom())
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diff changeset
340 return EMPTYSTRING.join(sdlist)
26046
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341
26850
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diff changeset
342 def getdelimited(self, beginchar, endchars, allowcomments=True):
26046
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343 """Parse a header fragment delimited by special characters.
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
344
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
345 `beginchar' is the start character for the fragment.
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
346 If self is not looking at an instance of `beginchar' then
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
347 getdelimited returns the empty string.
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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348
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
349 `endchars' is a sequence of allowable end-delimiting characters.
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
350 Parsing stops when one of these is encountered.
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
351
26848
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diff changeset
352 If `allowcomments' is non-zero, embedded RFC 2822 comments are allowed
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
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diff changeset
353 within the parsed fragment.
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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diff changeset
354 """
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
355 if self.field[self.pos] != beginchar:
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
356 return ''
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
357
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
358 slist = ['']
26850
803302573152 A code cleansing pass
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diff changeset
359 quote = False
803302573152 A code cleansing pass
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diff changeset
360 self.pos += 1
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
361 while self.pos < len(self.field):
26850
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
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diff changeset
362 if quote:
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
363 slist.append(self.field[self.pos])
26850
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
parents: 26848
diff changeset
364 quote = False
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
365 elif self.field[self.pos] in endchars:
26850
803302573152 A code cleansing pass
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diff changeset
366 self.pos += 1
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
367 break
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
368 elif allowcomments and self.field[self.pos] == '(':
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
369 slist.append(self.getcomment())
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
370 elif self.field[self.pos] == '\\':
26850
803302573152 A code cleansing pass
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diff changeset
371 quote = True
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
372 else:
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
373 slist.append(self.field[self.pos])
26850
803302573152 A code cleansing pass
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diff changeset
374 self.pos += 1
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
375
26850
803302573152 A code cleansing pass
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diff changeset
376 return EMPTYSTRING.join(slist)
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
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parents:
diff changeset
377
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
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diff changeset
378 def getquote(self):
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
379 """Get a quote-delimited fragment from self's field."""
26850
803302573152 A code cleansing pass
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parents: 26848
diff changeset
380 return self.getdelimited('"', '"\r', False)
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
381
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
382 def getcomment(self):
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
383 """Get a parenthesis-delimited fragment from self's field."""
26850
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
parents: 26848
diff changeset
384 return self.getdelimited('(', ')\r', True)
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
385
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
386 def getdomainliteral(self):
26848
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
387 """Parse an RFC 2822 domain-literal."""
26850
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
parents: 26848
diff changeset
388 return '[%s]' % self.getdelimited('[', ']\r', False)
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
389
26848
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
390 def getatom(self, atomends=None):
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
391 """Parse an RFC 2822 atom.
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
392
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
393 Optional atomends specifies a different set of end token delimiters
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
394 (the default is to use self.atomends). This is used e.g. in
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
395 getphraselist() since phrase endings must not include the `.' (which
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
396 is legal in phrases)."""
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
397 atomlist = ['']
26848
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
398 if atomends is None:
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
399 atomends = self.atomends
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
400
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
401 while self.pos < len(self.field):
26848
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
402 if self.field[self.pos] in atomends:
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
403 break
26850
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
parents: 26848
diff changeset
404 else:
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
parents: 26848
diff changeset
405 atomlist.append(self.field[self.pos])
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
parents: 26848
diff changeset
406 self.pos += 1
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
407
26850
803302573152 A code cleansing pass
Barry Warsaw <barry@python.org>
parents: 26848
diff changeset
408 return EMPTYSTRING.join(atomlist)
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
409
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
410 def getphraselist(self):
26848
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
Barry Warsaw <barry@python.org>
parents: 26046
diff changeset
411 """Parse a sequence of RFC 2822 phrases.
26046
1dbabc5beff7 Jason Mastaler's patch to break the dependence on rfc822.py for the
Barry Warsaw <barry@python.org>
parents:
diff changeset
412
26848
865c59b5bfd7 Port rfc822.py changes that didn't make it into this copy,
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413 A phrase is a sequence of words, which are in turn either RFC 2822
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414 atoms or quoted-strings. Phrases are canonicalized by squeezing all
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415 runs of continuous whitespace into one space.
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416 """
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417 plist = []
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418
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419 while self.pos < len(self.field):
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420 if self.field[self.pos] in self.LWS:
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421 self.pos += 1
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422 elif self.field[self.pos] == '"':
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423 plist.append(self.getquote())
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424 elif self.field[self.pos] == '(':
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425 self.commentlist.append(self.getcomment())
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426 elif self.field[self.pos] in self.phraseends:
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427 break
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428 else:
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429 plist.append(self.getatom(self.phraseends))
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430
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431 return plist
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432
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433 class AddressList(AddrlistClass):
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434 """An AddressList encapsulates a list of parsed RFC 2822 addresses."""
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435 def __init__(self, field):
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436 AddrlistClass.__init__(self, field)
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437 if field:
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438 self.addresslist = self.getaddrlist()
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439 else:
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440 self.addresslist = []
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441
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442 def __len__(self):
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443 return len(self.addresslist)
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444
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445 def __str__(self):
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446 return COMMASPACE.join(map(dump_address_pair, self.addresslist))
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447
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448 def __add__(self, other):
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449 # Set union
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450 newaddr = AddressList(None)
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451 newaddr.addresslist = self.addresslist[:]
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452 for x in other.addresslist:
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453 if not x in self.addresslist:
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454 newaddr.addresslist.append(x)
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455 return newaddr
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456
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457 def __iadd__(self, other):
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458 # Set union, in-place
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459 for x in other.addresslist:
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460 if not x in self.addresslist:
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461 self.addresslist.append(x)
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462 return self
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463
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464 def __sub__(self, other):
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465 # Set difference
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466 newaddr = AddressList(None)
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467 for x in self.addresslist:
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468 if not x in other.addresslist:
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469 newaddr.addresslist.append(x)
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470 return newaddr
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471
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472 def __isub__(self, other):
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473 # Set difference, in-place
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474 for x in other.addresslist:
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475 if x in self.addresslist:
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476 self.addresslist.remove(x)
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477 return self
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478
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479 def __getitem__(self, index):
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480 # Make indexing, slices, and 'in' work
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481 return self.addresslist[index]