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annotate roundup/mailgw.py @ 198:eda506860b32

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Implemented correct mail splitting (was taking a shortcut). Added unit tests. Also snips signatures now too.
author Richard Jones <richard@users.sourceforge.net>
date Fri, 03 Aug 2001 07:18:22 +0000
parents c580555a6508
children d702ac2ceedb
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1 '''
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2 An e-mail gateway for Roundup.
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3
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4 Incoming messages are examined for multiple parts:
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5 . In a multipart/mixed message or part, each subpart is extracted and
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6 examined. The text/plain subparts are assembled to form the textual
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7 body of the message, to be stored in the file associated with a "msg"
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8 class node. Any parts of other types are each stored in separate files
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9 and given "file" class nodes that are linked to the "msg" node.
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10 . In a multipart/alternative message or part, we look for a text/plain
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11 subpart and ignore the other parts.
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12
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13 Summary
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14 -------
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15 The "summary" property on message nodes is taken from the first non-quoting
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16 section in the message body. The message body is divided into sections by
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17 blank lines. Sections where the second and all subsequent lines begin with
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18 a ">" or "|" character are considered "quoting sections". The first line of
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19 the first non-quoting section becomes the summary of the message.
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21 Addresses
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22 ---------
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23 All of the addresses in the To: and Cc: headers of the incoming message are
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24 looked up among the user nodes, and the corresponding users are placed in
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25 the "recipients" property on the new "msg" node. The address in the From:
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26 header similarly determines the "author" property of the new "msg"
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27 node. The default handling for addresses that don't have corresponding
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28 users is to create new users with no passwords and a username equal to the
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29 address. (The web interface does not permit logins for users with no
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30 passwords.) If we prefer to reject mail from outside sources, we can simply
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31 register an auditor on the "user" class that prevents the creation of user
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32 nodes with no passwords.
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34 Actions
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35 -------
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36 The subject line of the incoming message is examined to determine whether
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37 the message is an attempt to create a new item or to discuss an existing
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38 item. A designator enclosed in square brackets is sought as the first thing
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39 on the subject line (after skipping any "Fwd:" or "Re:" prefixes).
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41 If an item designator (class name and id number) is found there, the newly
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42 created "msg" node is added to the "messages" property for that item, and
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43 any new "file" nodes are added to the "files" property for the item.
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45 If just an item class name is found there, we attempt to create a new item
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46 of that class with its "messages" property initialized to contain the new
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47 "msg" node and its "files" property initialized to contain any new "file"
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48 nodes.
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49
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50 Triggers
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51 --------
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52 Both cases may trigger detectors (in the first case we are calling the
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53 set() method to add the message to the item's spool; in the second case we
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54 are calling the create() method to create a new node). If an auditor raises
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55 an exception, the original message is bounced back to the sender with the
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56 explanatory message given in the exception.
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58 $Id: mailgw.py,v 1.7 2001-08-03 07:18:22 richard Exp $
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59 '''
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62 import string, re, os, mimetools, cStringIO, smtplib, socket, binascii, quopri
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63 import traceback
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64 import date
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65
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66 class Message(mimetools.Message):
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67 ''' subclass mimetools.Message so we can retrieve the parts of the
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68 message...
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69 '''
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70 def getPart(self):
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71 ''' Get a single part of a multipart message and return it as a new
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72 Message instance.
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73 '''
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74 boundary = self.getparam('boundary')
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75 mid, end = '--'+boundary, '--'+boundary+'--'
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76 s = cStringIO.StringIO()
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77 while 1:
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78 line = self.fp.readline()
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79 if not line:
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80 break
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81 if line.strip() in (mid, end):
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82 break
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83 s.write(line)
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84 if not s.getvalue().strip():
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85 return None
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86 s.seek(0)
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87 return Message(s)
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88
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89 subject_re = re.compile(r'(\[?(fwd|re):\s*)*'
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90 r'(\[(?P<classname>[^\d]+)(?P<nodeid>\d+)?\])'
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91 r'(?P<title>[^\[]+)(\[(?P<args>.+?)\])?', re.I)
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92
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93 class MailGW:
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94 def __init__(self, db):
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95 self.db = db
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96
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97 def main(self, fp):
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98 ''' fp - the file from which to read the Message.
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99
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100 Read a message from fp and then call handle_message() with the
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101 result. This method's job is to make that call and handle any
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102 errors in a sane manner. It should be replaced if you wish to
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103 handle errors in a different manner.
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104 '''
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105 # ok, figure the subject, author, recipients and content-type
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106 message = Message(fp)
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107 try:
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108 self.handle_message(message)
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109 except:
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110 # bounce the message back to the sender with the error message
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111 sendto = [message.getaddrlist('from')[0][1]]
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112 m = ['Subject: failed issue tracker submission']
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113 m.append('')
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114 # TODO as attachments?
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115 m.append('---- traceback of failure ----')
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116 s = cStringIO.StringIO()
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117 import traceback
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118 traceback.print_exc(None, s)
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119 m.append(s.getvalue())
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120 m.append('---- failed message follows ----')
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121 try:
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122 fp.seek(0)
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123 except:
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124 pass
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125 m.append(fp.read())
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126 try:
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127 smtp = smtplib.SMTP(self.MAILHOST)
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128 smtp.sendmail(self.ADMIN_EMAIL, sendto, '\n'.join(m))
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129 except socket.error, value:
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130 return "Couldn't send confirmation email: mailhost %s"%value
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131 except smtplib.SMTPException, value:
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132 return "Couldn't send confirmation email: %s"%value
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133
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134 def handle_message(self, message):
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135 ''' message - a Message instance
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136
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137 Parse the message as per the module docstring.
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138 '''
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139 # handle the subject line
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140 m = subject_re.match(message.getheader('subject'))
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141 if not m:
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142 raise ValueError, 'No [designator] found in subject "%s"'
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143 classname = m.group('classname')
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144 nodeid = m.group('nodeid')
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145 title = m.group('title').strip()
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146 subject_args = m.group('args')
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147 cl = self.db.getclass(classname)
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148 properties = cl.getprops()
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149 props = {}
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150 args = m.group('args')
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151 if args:
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152 for prop in string.split(m.group('args'), ';'):
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153 try:
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154 key, value = prop.split('=')
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155 except ValueError, message:
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156 raise ValueError, 'Args list not of form [arg=value,value,...;arg=value,value,value..] (specific exception message was "%s")'%message
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157 type = properties[key]
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158 if type.isStringType:
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159 props[key] = value
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160 elif type.isDateType:
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161 props[key] = date.Date(value)
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162 elif type.isIntervalType:
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163 props[key] = date.Interval(value)
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164 elif type.isLinkType:
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165 props[key] = value
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166 elif type.isMultilinkType:
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167 props[key] = value.split(',')
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168
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169 # handle the users
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170 author = self.db.uidFromAddress(message.getaddrlist('from')[0])
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171 recipients = []
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172 for recipient in message.getaddrlist('to') + message.getaddrlist('cc'):
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173 if recipient[1].strip().lower() == self.ISSUE_TRACKER_EMAIL:
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174 continue
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175 recipients.append(self.db.uidFromAddress(recipient))
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176
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177 # now handle the body - find the message
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178 content_type = message.gettype()
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179 attachments = []
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180 if content_type == 'multipart/mixed':
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181 # skip over the intro to the first boundary
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182 part = message.getPart()
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183 content = None
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184 while 1:
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185 # get the next part
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186 part = message.getPart()
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187 if part is None:
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188 break
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189 # parse it
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190 subtype = part.gettype()
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191 if subtype == 'text/plain' and not content:
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192 # add all text/plain parts to the message content
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193 if content is None:
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194 content = part.fp.read()
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195 else:
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196 content = content + part.fp.read()
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197
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198 elif subtype == 'message/rfc822':
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199 # handle message/rfc822 specially - the name should be
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200 # the subject of the actual e-mail embedded here
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diff changeset
201 i = part.fp.tell()
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202 mailmess = Message(part.fp)
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diff changeset
203 name = mailmess.getheader('subject')
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204 part.fp.seek(i)
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205 attachments.append((name, 'message/rfc822', part.fp.read()))
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206
25
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207 else:
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208 # try name on Content-Type
110
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209 name = part.getparam('name')
25
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210 # this is just an attachment
110
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diff changeset
211 data = part.fp.read()
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212 encoding = part.getencoding()
25
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213 if encoding == 'base64':
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214 data = binascii.a2b_base64(data)
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215 elif encoding == 'quoted-printable':
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216 data = quopri.decode(data)
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217 elif encoding == 'uuencoded':
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218 data = binascii.a2b_uu(data)
110
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diff changeset
219 attachments.append((name, part.gettype(), data))
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diff changeset
220
25
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221 if content is None:
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222 raise ValueError, 'No text/plain part found'
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223
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224 elif content_type[:10] == 'multipart/':
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225 # skip over the intro to the first boundary
110
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226 message.getPart()
25
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227 content = None
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228 while 1:
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229 # get the next part
110
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diff changeset
230 part = message.getPart()
25
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231 if part is None:
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232 break
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233 # parse it
110
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diff changeset
234 if part.gettype() == 'text/plain' and not content:
25
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235 # this one's our content
110
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diff changeset
236 content = part.fp.read()
25
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237 if content is None:
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238 raise ValueError, 'No text/plain part found'
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diff changeset
239
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240 elif content_type != 'text/plain':
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diff changeset
241 raise ValueError, 'No text/plain part found'
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diff changeset
242
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243 else:
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diff changeset
244 content = message.fp.read()
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245
198
eda506860b32 Implemented correct mail splitting (was taking a shortcut).
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diff changeset
246 summary, content = parseContent(content)
25
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247
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248 # handle the files
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diff changeset
249 files = []
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250 for (name, type, data) in attachments:
172
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diff changeset
251 files.append(self.db.file.create(type=type, name=name,
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diff changeset
252 content=data))
25
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diff changeset
253
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diff changeset
254 # now handle the db stuff
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255 if nodeid:
172
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diff changeset
256 # If an item designator (class name and id number) is found there,
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diff changeset
257 # the newly created "msg" node is added to the "messages" property
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diff changeset
258 # for that item, and any new "file" nodes are added to the "files"
25
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259 # property for the item.
172
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diff changeset
260 message_id = self.db.msg.create(author=author,
c580555a6508 mailgw was assuming certain properties existed on the issues being created.
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diff changeset
261 recipients=recipients, date=date.Date('.'), summary=summary,
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diff changeset
262 content=content, files=files)
25
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diff changeset
263 messages = cl.get(nodeid, 'messages')
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diff changeset
264 messages.append(message_id)
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265 props['messages'] = messages
172
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diff changeset
266 cl.set(nodeid, **props)
25
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267 else:
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268 # If just an item class name is found there, we attempt to create a
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269 # new item of that class with its "messages" property initialized to
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270 # contain the new "msg" node and its "files" property initialized to
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271 # contain any new "file" nodes.
172
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diff changeset
272 message_id = self.db.msg.create(author=author,
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diff changeset
273 recipients=recipients, date=date.Date('.'), summary=summary,
c580555a6508 mailgw was assuming certain properties existed on the issues being created.
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parents: 127
diff changeset
274 content=content, files=files)
c580555a6508 mailgw was assuming certain properties existed on the issues being created.
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diff changeset
275 # fill out the properties with defaults where required
c580555a6508 mailgw was assuming certain properties existed on the issues being created.
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diff changeset
276 if properties.has_key('assignedto') and \
c580555a6508 mailgw was assuming certain properties existed on the issues being created.
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parents: 127
diff changeset
277 not props.has_key('assignedto'):
103
381016730332 Fixed some non-string node ids.
Richard Jones <richard@users.sourceforge.net>
parents: 26
diff changeset
278 props['assignedto'] = '1' # "admin"
172
c580555a6508 mailgw was assuming certain properties existed on the issues being created.
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parents: 127
diff changeset
279 if properties.has_key('status') and not props.has_key('status'):
103
381016730332 Fixed some non-string node ids.
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parents: 26
diff changeset
280 props['status'] = '1' # "unread"
172
c580555a6508 mailgw was assuming certain properties existed on the issues being created.
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diff changeset
281 if properties.has_key('title') and not props.has_key('title'):
25
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diff changeset
282 props['title'] = title
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parents:
diff changeset
283 props['messages'] = [message_id]
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diff changeset
284 props['nosy'] = recipients[:]
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parents:
diff changeset
285 props['nosy'].append(author)
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diff changeset
286 props['nosy'].sort()
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diff changeset
287 nodeid = cl.create(**props)
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diff changeset
288
198
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diff changeset
289 def parseContent(content, blank_line=re.compile(r'[\r\n]+\s*[\r\n]+'),
eda506860b32 Implemented correct mail splitting (was taking a shortcut).
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parents: 172
diff changeset
290 eol=re.compile(r'[\r\n]+'), signature=re.compile(r'^[>|\s]*[-_]+\s*$')):
eda506860b32 Implemented correct mail splitting (was taking a shortcut).
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diff changeset
291 ''' The message body is divided into sections by blank lines.
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parents: 172
diff changeset
292 Sections where the second and all subsequent lines begin with a ">" or "|"
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293 character are considered "quoting sections". The first line of the first
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294 non-quoting section becomes the summary of the message.
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295 '''
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296 sections = blank_line.split(content)
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297 # extract out the summary from the message
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298 summary = ''
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299 l = []
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300 print sections
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301 for section in sections:
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302 section = section.strip()
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303 if not section:
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304 continue
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305 lines = eol.split(section)
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306 if lines[0] and lines[0][0] in '>|':
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307 continue
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308 if len(lines) > 1 and lines[1] and lines[1][0] in '>|':
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309 continue
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310 if not summary:
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311 summary = lines[0]
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312 l.append(section)
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313 continue
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314 if signature.match(lines[0]):
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315 break
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316 l.append(section)
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317 return summary, '\n'.join(l)
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318
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319 #
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320 # $Log: not supported by cvs2svn $
198
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321 # Revision 1.6 2001/08/01 04:24:21 richard
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322 # mailgw was assuming certain properties existed on the issues being created.
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323 #
172
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324 # Revision 1.5 2001/07/29 07:01:39 richard
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325 # Added vim command to all source so that we don't get no steenkin' tabs :)
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326 #
127
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327 # Revision 1.4 2001/07/28 06:43:02 richard
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328 # Multipart message class has the getPart method now. Added some tests for it.
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329 #
110
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330 # Revision 1.3 2001/07/28 00:34:34 richard
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331 # Fixed some non-string node ids.
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332 #
103
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333 # Revision 1.2 2001/07/22 12:09:32 richard
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334 # Final commit of Grande Splite
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335 #
103
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336 #
127
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337 # vim: set filetype=python ts=4 sw=4 et si
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