Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/future/backports/email/message.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
parents d30785e31577
children
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1 # -*- coding: utf-8 -*-
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2 # Copyright (C) 2001-2007 Python Software Foundation
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3 # Author: Barry Warsaw
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4 # Contact: email-sig@python.org
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5
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6 """Basic message object for the email package object model."""
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7 from __future__ import absolute_import, division, unicode_literals
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8 from future.builtins import list, range, str, zip
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9
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10 __all__ = ['Message']
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11
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12 import re
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13 import uu
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14 import base64
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15 import binascii
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16 from io import BytesIO, StringIO
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17
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18 # Intrapackage imports
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19 from future.utils import as_native_str
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20 from future.backports.email import utils
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21 from future.backports.email import errors
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22 from future.backports.email._policybase import compat32
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23 from future.backports.email import charset as _charset
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24 from future.backports.email._encoded_words import decode_b
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25 Charset = _charset.Charset
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26
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27 SEMISPACE = '; '
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28
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29 # Regular expression that matches `special' characters in parameters, the
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30 # existence of which force quoting of the parameter value.
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31 tspecials = re.compile(r'[ \(\)<>@,;:\\"/\[\]\?=]')
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32
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33
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34 def _splitparam(param):
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35 # Split header parameters. BAW: this may be too simple. It isn't
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36 # strictly RFC 2045 (section 5.1) compliant, but it catches most headers
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37 # found in the wild. We may eventually need a full fledged parser.
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38 # RDM: we might have a Header here; for now just stringify it.
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39 a, sep, b = str(param).partition(';')
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40 if not sep:
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41 return a.strip(), None
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42 return a.strip(), b.strip()
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43
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44 def _formatparam(param, value=None, quote=True):
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45 """Convenience function to format and return a key=value pair.
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46
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47 This will quote the value if needed or if quote is true. If value is a
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48 three tuple (charset, language, value), it will be encoded according
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49 to RFC2231 rules. If it contains non-ascii characters it will likewise
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50 be encoded according to RFC2231 rules, using the utf-8 charset and
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51 a null language.
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52 """
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53 if value is not None and len(value) > 0:
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54 # A tuple is used for RFC 2231 encoded parameter values where items
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55 # are (charset, language, value). charset is a string, not a Charset
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56 # instance. RFC 2231 encoded values are never quoted, per RFC.
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57 if isinstance(value, tuple):
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58 # Encode as per RFC 2231
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59 param += '*'
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60 value = utils.encode_rfc2231(value[2], value[0], value[1])
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61 return '%s=%s' % (param, value)
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62 else:
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63 try:
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64 value.encode('ascii')
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65 except UnicodeEncodeError:
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66 param += '*'
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67 value = utils.encode_rfc2231(value, 'utf-8', '')
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68 return '%s=%s' % (param, value)
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69 # BAW: Please check this. I think that if quote is set it should
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70 # force quoting even if not necessary.
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71 if quote or tspecials.search(value):
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72 return '%s="%s"' % (param, utils.quote(value))
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73 else:
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74 return '%s=%s' % (param, value)
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75 else:
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76 return param
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77
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78 def _parseparam(s):
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79 # RDM This might be a Header, so for now stringify it.
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80 s = ';' + str(s)
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81 plist = []
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82 while s[:1] == ';':
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83 s = s[1:]
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84 end = s.find(';')
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85 while end > 0 and (s.count('"', 0, end) - s.count('\\"', 0, end)) % 2:
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86 end = s.find(';', end + 1)
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87 if end < 0:
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88 end = len(s)
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89 f = s[:end]
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90 if '=' in f:
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91 i = f.index('=')
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92 f = f[:i].strip().lower() + '=' + f[i+1:].strip()
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93 plist.append(f.strip())
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94 s = s[end:]
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95 return plist
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96
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97
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98 def _unquotevalue(value):
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99 # This is different than utils.collapse_rfc2231_value() because it doesn't
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100 # try to convert the value to a unicode. Message.get_param() and
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101 # Message.get_params() are both currently defined to return the tuple in
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102 # the face of RFC 2231 parameters.
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103 if isinstance(value, tuple):
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104 return value[0], value[1], utils.unquote(value[2])
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105 else:
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106 return utils.unquote(value)
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107
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108
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109 class Message(object):
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110 """Basic message object.
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111
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112 A message object is defined as something that has a bunch of RFC 2822
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113 headers and a payload. It may optionally have an envelope header
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114 (a.k.a. Unix-From or From_ header). If the message is a container (i.e. a
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115 multipart or a message/rfc822), then the payload is a list of Message
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116 objects, otherwise it is a string.
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117
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118 Message objects implement part of the `mapping' interface, which assumes
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119 there is exactly one occurrence of the header per message. Some headers
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120 do in fact appear multiple times (e.g. Received) and for those headers,
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121 you must use the explicit API to set or get all the headers. Not all of
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122 the mapping methods are implemented.
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123 """
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124 def __init__(self, policy=compat32):
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125 self.policy = policy
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126 self._headers = list()
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127 self._unixfrom = None
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128 self._payload = None
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129 self._charset = None
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130 # Defaults for multipart messages
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131 self.preamble = self.epilogue = None
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132 self.defects = []
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133 # Default content type
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134 self._default_type = 'text/plain'
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135
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136 @as_native_str(encoding='utf-8')
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137 def __str__(self):
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138 """Return the entire formatted message as a string.
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139 This includes the headers, body, and envelope header.
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140 """
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141 return self.as_string()
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142
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143 def as_string(self, unixfrom=False, maxheaderlen=0):
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144 """Return the entire formatted message as a (unicode) string.
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145 Optional `unixfrom' when True, means include the Unix From_ envelope
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146 header.
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147
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148 This is a convenience method and may not generate the message exactly
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149 as you intend. For more flexibility, use the flatten() method of a
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150 Generator instance.
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151 """
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152 from future.backports.email.generator import Generator
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153 fp = StringIO()
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154 g = Generator(fp, mangle_from_=False, maxheaderlen=maxheaderlen)
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155 g.flatten(self, unixfrom=unixfrom)
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156 return fp.getvalue()
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157
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158 def is_multipart(self):
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159 """Return True if the message consists of multiple parts."""
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160 return isinstance(self._payload, list)
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161
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162 #
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163 # Unix From_ line
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164 #
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165 def set_unixfrom(self, unixfrom):
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166 self._unixfrom = unixfrom
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167
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168 def get_unixfrom(self):
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169 return self._unixfrom
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170
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171 #
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172 # Payload manipulation.
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173 #
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174 def attach(self, payload):
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175 """Add the given payload to the current payload.
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176
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177 The current payload will always be a list of objects after this method
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178 is called. If you want to set the payload to a scalar object, use
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179 set_payload() instead.
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180 """
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181 if self._payload is None:
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182 self._payload = [payload]
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183 else:
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184 self._payload.append(payload)
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185
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186 def get_payload(self, i=None, decode=False):
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187 """Return a reference to the payload.
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188
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189 The payload will either be a list object or a string. If you mutate
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190 the list object, you modify the message's payload in place. Optional
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191 i returns that index into the payload.
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192
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193 Optional decode is a flag indicating whether the payload should be
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194 decoded or not, according to the Content-Transfer-Encoding header
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195 (default is False).
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196
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197 When True and the message is not a multipart, the payload will be
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198 decoded if this header's value is `quoted-printable' or `base64'. If
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199 some other encoding is used, or the header is missing, or if the
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200 payload has bogus data (i.e. bogus base64 or uuencoded data), the
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201 payload is returned as-is.
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202
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203 If the message is a multipart and the decode flag is True, then None
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204 is returned.
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205 """
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206 # Here is the logic table for this code, based on the email5.0.0 code:
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207 # i decode is_multipart result
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208 # ------ ------ ------------ ------------------------------
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209 # None True True None
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210 # i True True None
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211 # None False True _payload (a list)
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212 # i False True _payload element i (a Message)
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213 # i False False error (not a list)
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214 # i True False error (not a list)
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215 # None False False _payload
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216 # None True False _payload decoded (bytes)
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217 # Note that Barry planned to factor out the 'decode' case, but that
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218 # isn't so easy now that we handle the 8 bit data, which needs to be
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219 # converted in both the decode and non-decode path.
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220 if self.is_multipart():
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221 if decode:
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222 return None
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223 if i is None:
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224 return self._payload
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225 else:
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226 return self._payload[i]
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227 # For backward compatibility, Use isinstance and this error message
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228 # instead of the more logical is_multipart test.
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229 if i is not None and not isinstance(self._payload, list):
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230 raise TypeError('Expected list, got %s' % type(self._payload))
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231 payload = self._payload
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232 # cte might be a Header, so for now stringify it.
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233 cte = str(self.get('content-transfer-encoding', '')).lower()
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234 # payload may be bytes here.
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235 if isinstance(payload, str):
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236 payload = str(payload) # for Python-Future, so surrogateescape works
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237 if utils._has_surrogates(payload):
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238 bpayload = payload.encode('ascii', 'surrogateescape')
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239 if not decode:
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240 try:
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241 payload = bpayload.decode(self.get_param('charset', 'ascii'), 'replace')
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242 except LookupError:
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243 payload = bpayload.decode('ascii', 'replace')
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244 elif decode:
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245 try:
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246 bpayload = payload.encode('ascii')
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247 except UnicodeError:
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248 # This won't happen for RFC compliant messages (messages
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249 # containing only ASCII codepoints in the unicode input).
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250 # If it does happen, turn the string into bytes in a way
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251 # guaranteed not to fail.
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252 bpayload = payload.encode('raw-unicode-escape')
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253 if not decode:
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254 return payload
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255 if cte == 'quoted-printable':
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256 return utils._qdecode(bpayload)
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257 elif cte == 'base64':
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258 # XXX: this is a bit of a hack; decode_b should probably be factored
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259 # out somewhere, but I haven't figured out where yet.
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260 value, defects = decode_b(b''.join(bpayload.splitlines()))
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261 for defect in defects:
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262 self.policy.handle_defect(self, defect)
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263 return value
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264 elif cte in ('x-uuencode', 'uuencode', 'uue', 'x-uue'):
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265 in_file = BytesIO(bpayload)
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266 out_file = BytesIO()
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267 try:
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268 uu.decode(in_file, out_file, quiet=True)
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269 return out_file.getvalue()
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270 except uu.Error:
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271 # Some decoding problem
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272 return bpayload
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273 if isinstance(payload, str):
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274 return bpayload
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275 return payload
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276
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277 def set_payload(self, payload, charset=None):
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278 """Set the payload to the given value.
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279
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280 Optional charset sets the message's default character set. See
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281 set_charset() for details.
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282 """
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283 self._payload = payload
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284 if charset is not None:
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285 self.set_charset(charset)
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286
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287 def set_charset(self, charset):
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288 """Set the charset of the payload to a given character set.
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289
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290 charset can be a Charset instance, a string naming a character set, or
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291 None. If it is a string it will be converted to a Charset instance.
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292 If charset is None, the charset parameter will be removed from the
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293 Content-Type field. Anything else will generate a TypeError.
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294
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295 The message will be assumed to be of type text/* encoded with
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296 charset.input_charset. It will be converted to charset.output_charset
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297 and encoded properly, if needed, when generating the plain text
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298 representation of the message. MIME headers (MIME-Version,
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299 Content-Type, Content-Transfer-Encoding) will be added as needed.
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300 """
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301 if charset is None:
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302 self.del_param('charset')
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303 self._charset = None
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304 return
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305 if not isinstance(charset, Charset):
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306 charset = Charset(charset)
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307 self._charset = charset
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308 if 'MIME-Version' not in self:
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309 self.add_header('MIME-Version', '1.0')
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310 if 'Content-Type' not in self:
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311 self.add_header('Content-Type', 'text/plain',
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312 charset=charset.get_output_charset())
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313 else:
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314 self.set_param('charset', charset.get_output_charset())
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315 if charset != charset.get_output_charset():
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316 self._payload = charset.body_encode(self._payload)
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317 if 'Content-Transfer-Encoding' not in self:
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318 cte = charset.get_body_encoding()
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319 try:
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320 cte(self)
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321 except TypeError:
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322 self._payload = charset.body_encode(self._payload)
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323 self.add_header('Content-Transfer-Encoding', cte)
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324
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325 def get_charset(self):
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326 """Return the Charset instance associated with the message's payload.
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327 """
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328 return self._charset
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329
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330 #
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331 # MAPPING INTERFACE (partial)
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332 #
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333 def __len__(self):
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334 """Return the total number of headers, including duplicates."""
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335 return len(self._headers)
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336
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337 def __getitem__(self, name):
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338 """Get a header value.
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339
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340 Return None if the header is missing instead of raising an exception.
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341
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342 Note that if the header appeared multiple times, exactly which
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343 occurrence gets returned is undefined. Use get_all() to get all
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344 the values matching a header field name.
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345 """
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346 return self.get(name)
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347
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348 def __setitem__(self, name, val):
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349 """Set the value of a header.
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350
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351 Note: this does not overwrite an existing header with the same field
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352 name. Use __delitem__() first to delete any existing headers.
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353 """
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354 max_count = self.policy.header_max_count(name)
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355 if max_count:
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356 lname = name.lower()
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357 found = 0
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358 for k, v in self._headers:
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359 if k.lower() == lname:
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360 found += 1
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361 if found >= max_count:
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362 raise ValueError("There may be at most {} {} headers "
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363 "in a message".format(max_count, name))
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364 self._headers.append(self.policy.header_store_parse(name, val))
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365
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366 def __delitem__(self, name):
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367 """Delete all occurrences of a header, if present.
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368
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369 Does not raise an exception if the header is missing.
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370 """
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371 name = name.lower()
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372 newheaders = list()
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373 for k, v in self._headers:
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374 if k.lower() != name:
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375 newheaders.append((k, v))
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376 self._headers = newheaders
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377
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378 def __contains__(self, name):
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379 return name.lower() in [k.lower() for k, v in self._headers]
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380
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381 def __iter__(self):
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382 for field, value in self._headers:
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383 yield field
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384
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385 def keys(self):
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386 """Return a list of all the message's header field names.
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387
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388 These will be sorted in the order they appeared in the original
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389 message, or were added to the message, and may contain duplicates.
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390 Any fields deleted and re-inserted are always appended to the header
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391 list.
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392 """
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393 return [k for k, v in self._headers]
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394
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395 def values(self):
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396 """Return a list of all the message's header values.
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397
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398 These will be sorted in the order they appeared in the original
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399 message, or were added to the message, and may contain duplicates.
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400 Any fields deleted and re-inserted are always appended to the header
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401 list.
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402 """
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403 return [self.policy.header_fetch_parse(k, v)
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404 for k, v in self._headers]
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405
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406 def items(self):
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407 """Get all the message's header fields and values.
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408
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409 These will be sorted in the order they appeared in the original
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410 message, or were added to the message, and may contain duplicates.
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411 Any fields deleted and re-inserted are always appended to the header
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412 list.
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413 """
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414 return [(k, self.policy.header_fetch_parse(k, v))
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415 for k, v in self._headers]
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416
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417 def get(self, name, failobj=None):
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418 """Get a header value.
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419
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420 Like __getitem__() but return failobj instead of None when the field
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421 is missing.
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422 """
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423 name = name.lower()
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424 for k, v in self._headers:
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425 if k.lower() == name:
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426 return self.policy.header_fetch_parse(k, v)
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427 return failobj
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428
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429 #
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430 # "Internal" methods (public API, but only intended for use by a parser
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431 # or generator, not normal application code.
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432 #
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433
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434 def set_raw(self, name, value):
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435 """Store name and value in the model without modification.
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436
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437 This is an "internal" API, intended only for use by a parser.
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438 """
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439 self._headers.append((name, value))
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440
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441 def raw_items(self):
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442 """Return the (name, value) header pairs without modification.
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443
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444 This is an "internal" API, intended only for use by a generator.
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445 """
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446 return iter(self._headers.copy())
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447
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448 #
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449 # Additional useful stuff
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450 #
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451
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452 def get_all(self, name, failobj=None):
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453 """Return a list of all the values for the named field.
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454
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455 These will be sorted in the order they appeared in the original
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456 message, and may contain duplicates. Any fields deleted and
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457 re-inserted are always appended to the header list.
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458
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459 If no such fields exist, failobj is returned (defaults to None).
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460 """
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461 values = []
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462 name = name.lower()
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463 for k, v in self._headers:
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464 if k.lower() == name:
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465 values.append(self.policy.header_fetch_parse(k, v))
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466 if not values:
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467 return failobj
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468 return values
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469
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470 def add_header(self, _name, _value, **_params):
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471 """Extended header setting.
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472
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473 name is the header field to add. keyword arguments can be used to set
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474 additional parameters for the header field, with underscores converted
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475 to dashes. Normally the parameter will be added as key="value" unless
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476 value is None, in which case only the key will be added. If a
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477 parameter value contains non-ASCII characters it can be specified as a
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478 three-tuple of (charset, language, value), in which case it will be
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479 encoded according to RFC2231 rules. Otherwise it will be encoded using
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480 the utf-8 charset and a language of ''.
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481
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482 Examples:
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483
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484 msg.add_header('content-disposition', 'attachment', filename='bud.gif')
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485 msg.add_header('content-disposition', 'attachment',
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486 filename=('utf-8', '', 'Fußballer.ppt'))
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487 msg.add_header('content-disposition', 'attachment',
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488 filename='Fußballer.ppt'))
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489 """
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490 parts = []
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491 for k, v in _params.items():
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492 if v is None:
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493 parts.append(k.replace('_', '-'))
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494 else:
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495 parts.append(_formatparam(k.replace('_', '-'), v))
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496 if _value is not None:
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497 parts.insert(0, _value)
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498 self[_name] = SEMISPACE.join(parts)
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499
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500 def replace_header(self, _name, _value):
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501 """Replace a header.
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502
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503 Replace the first matching header found in the message, retaining
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504 header order and case. If no matching header was found, a KeyError is
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505 raised.
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506 """
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507 _name = _name.lower()
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508 for i, (k, v) in zip(range(len(self._headers)), self._headers):
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509 if k.lower() == _name:
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510 self._headers[i] = self.policy.header_store_parse(k, _value)
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511 break
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512 else:
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513 raise KeyError(_name)
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514
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515 #
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516 # Use these three methods instead of the three above.
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517 #
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518
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519 def get_content_type(self):
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520 """Return the message's content type.
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521
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522 The returned string is coerced to lower case of the form
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523 `maintype/subtype'. If there was no Content-Type header in the
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diff changeset
524 message, the default type as given by get_default_type() will be
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diff changeset
525 returned. Since according to RFC 2045, messages always have a default
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diff changeset
526 type this will always return a value.
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diff changeset
527
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diff changeset
528 RFC 2045 defines a message's default type to be text/plain unless it
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diff changeset
529 appears inside a multipart/digest container, in which case it would be
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diff changeset
530 message/rfc822.
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diff changeset
531 """
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diff changeset
532 missing = object()
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diff changeset
533 value = self.get('content-type', missing)
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diff changeset
534 if value is missing:
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diff changeset
535 # This should have no parameters
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diff changeset
536 return self.get_default_type()
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diff changeset
537 ctype = _splitparam(value)[0].lower()
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diff changeset
538 # RFC 2045, section 5.2 says if its invalid, use text/plain
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diff changeset
539 if ctype.count('/') != 1:
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diff changeset
540 return 'text/plain'
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diff changeset
541 return ctype
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542
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543 def get_content_maintype(self):
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diff changeset
544 """Return the message's main content type.
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545
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546 This is the `maintype' part of the string returned by
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547 get_content_type().
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548 """
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549 ctype = self.get_content_type()
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550 return ctype.split('/')[0]
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diff changeset
551
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552 def get_content_subtype(self):
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diff changeset
553 """Returns the message's sub-content type.
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554
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555 This is the `subtype' part of the string returned by
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556 get_content_type().
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557 """
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558 ctype = self.get_content_type()
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559 return ctype.split('/')[1]
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diff changeset
560
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561 def get_default_type(self):
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diff changeset
562 """Return the `default' content type.
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563
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564 Most messages have a default content type of text/plain, except for
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diff changeset
565 messages that are subparts of multipart/digest containers. Such
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diff changeset
566 subparts have a default content type of message/rfc822.
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567 """
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568 return self._default_type
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569
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570 def set_default_type(self, ctype):
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diff changeset
571 """Set the `default' content type.
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572
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573 ctype should be either "text/plain" or "message/rfc822", although this
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574 is not enforced. The default content type is not stored in the
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diff changeset
575 Content-Type header.
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576 """
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577 self._default_type = ctype
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578
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579 def _get_params_preserve(self, failobj, header):
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580 # Like get_params() but preserves the quoting of values. BAW:
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diff changeset
581 # should this be part of the public interface?
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diff changeset
582 missing = object()
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583 value = self.get(header, missing)
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584 if value is missing:
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585 return failobj
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586 params = []
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587 for p in _parseparam(value):
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588 try:
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diff changeset
589 name, val = p.split('=', 1)
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590 name = name.strip()
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591 val = val.strip()
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592 except ValueError:
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593 # Must have been a bare attribute
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594 name = p.strip()
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595 val = ''
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596 params.append((name, val))
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597 params = utils.decode_params(params)
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598 return params
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599
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600 def get_params(self, failobj=None, header='content-type', unquote=True):
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diff changeset
601 """Return the message's Content-Type parameters, as a list.
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602
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603 The elements of the returned list are 2-tuples of key/value pairs, as
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diff changeset
604 split on the `=' sign. The left hand side of the `=' is the key,
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diff changeset
605 while the right hand side is the value. If there is no `=' sign in
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diff changeset
606 the parameter the value is the empty string. The value is as
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diff changeset
607 described in the get_param() method.
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608
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609 Optional failobj is the object to return if there is no Content-Type
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610 header. Optional header is the header to search instead of
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611 Content-Type. If unquote is True, the value is unquoted.
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612 """
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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613 missing = object()
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614 params = self._get_params_preserve(missing, header)
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615 if params is missing:
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616 return failobj
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617 if unquote:
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618 return [(k, _unquotevalue(v)) for k, v in params]
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619 else:
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620 return params
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621
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622 def get_param(self, param, failobj=None, header='content-type',
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diff changeset
623 unquote=True):
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diff changeset
624 """Return the parameter value if found in the Content-Type header.
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625
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626 Optional failobj is the object to return if there is no Content-Type
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627 header, or the Content-Type header has no such parameter. Optional
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628 header is the header to search instead of Content-Type.
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diff changeset
629
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630 Parameter keys are always compared case insensitively. The return
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631 value can either be a string, or a 3-tuple if the parameter was RFC
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632 2231 encoded. When it's a 3-tuple, the elements of the value are of
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diff changeset
633 the form (CHARSET, LANGUAGE, VALUE). Note that both CHARSET and
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diff changeset
634 LANGUAGE can be None, in which case you should consider VALUE to be
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diff changeset
635 encoded in the us-ascii charset. You can usually ignore LANGUAGE.
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636 The parameter value (either the returned string, or the VALUE item in
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
637 the 3-tuple) is always unquoted, unless unquote is set to False.
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638
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639 If your application doesn't care whether the parameter was RFC 2231
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diff changeset
640 encoded, it can turn the return value into a string as follows:
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641
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642 param = msg.get_param('foo')
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643 param = email.utils.collapse_rfc2231_value(rawparam)
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644
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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645 """
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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646 if header not in self:
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647 return failobj
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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648 for k, v in self._get_params_preserve(failobj, header):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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649 if k.lower() == param.lower():
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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650 if unquote:
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651 return _unquotevalue(v)
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652 else:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
653 return v
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
654 return failobj
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
655
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
656 def set_param(self, param, value, header='Content-Type', requote=True,
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
657 charset=None, language=''):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
658 """Set a parameter in the Content-Type header.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
659
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
660 If the parameter already exists in the header, its value will be
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
661 replaced with the new value.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
662
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
663 If header is Content-Type and has not yet been defined for this
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
664 message, it will be set to "text/plain" and the new parameter and
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
665 value will be appended as per RFC 2045.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
666
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
667 An alternate header can specified in the header argument, and all
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
668 parameters will be quoted as necessary unless requote is False.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
669
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
670 If charset is specified, the parameter will be encoded according to RFC
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
671 2231. Optional language specifies the RFC 2231 language, defaulting
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
672 to the empty string. Both charset and language should be strings.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
673 """
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
674 if not isinstance(value, tuple) and charset:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
675 value = (charset, language, value)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
676
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
677 if header not in self and header.lower() == 'content-type':
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
678 ctype = 'text/plain'
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
679 else:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
680 ctype = self.get(header)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
681 if not self.get_param(param, header=header):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
682 if not ctype:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
683 ctype = _formatparam(param, value, requote)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
684 else:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
685 ctype = SEMISPACE.join(
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
686 [ctype, _formatparam(param, value, requote)])
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
687 else:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
688 ctype = ''
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
689 for old_param, old_value in self.get_params(header=header,
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
690 unquote=requote):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
691 append_param = ''
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
692 if old_param.lower() == param.lower():
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
693 append_param = _formatparam(param, value, requote)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
694 else:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
695 append_param = _formatparam(old_param, old_value, requote)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
696 if not ctype:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
697 ctype = append_param
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
698 else:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
699 ctype = SEMISPACE.join([ctype, append_param])
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
700 if ctype != self.get(header):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
701 del self[header]
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
702 self[header] = ctype
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
703
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
704 def del_param(self, param, header='content-type', requote=True):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
705 """Remove the given parameter completely from the Content-Type header.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
706
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
707 The header will be re-written in place without the parameter or its
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
708 value. All values will be quoted as necessary unless requote is
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
709 False. Optional header specifies an alternative to the Content-Type
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
710 header.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
711 """
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
712 if header not in self:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
713 return
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
714 new_ctype = ''
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
715 for p, v in self.get_params(header=header, unquote=requote):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
716 if p.lower() != param.lower():
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
717 if not new_ctype:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
718 new_ctype = _formatparam(p, v, requote)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
719 else:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
720 new_ctype = SEMISPACE.join([new_ctype,
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
721 _formatparam(p, v, requote)])
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
722 if new_ctype != self.get(header):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
723 del self[header]
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
724 self[header] = new_ctype
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
725
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
726 def set_type(self, type, header='Content-Type', requote=True):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
727 """Set the main type and subtype for the Content-Type header.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
728
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
729 type must be a string in the form "maintype/subtype", otherwise a
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
730 ValueError is raised.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
731
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
732 This method replaces the Content-Type header, keeping all the
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
733 parameters in place. If requote is False, this leaves the existing
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
734 header's quoting as is. Otherwise, the parameters will be quoted (the
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
735 default).
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
736
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
737 An alternative header can be specified in the header argument. When
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
738 the Content-Type header is set, we'll always also add a MIME-Version
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
739 header.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
740 """
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
741 # BAW: should we be strict?
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
742 if not type.count('/') == 1:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
743 raise ValueError
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
744 # Set the Content-Type, you get a MIME-Version
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
745 if header.lower() == 'content-type':
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
746 del self['mime-version']
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
747 self['MIME-Version'] = '1.0'
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
748 if header not in self:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
749 self[header] = type
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
750 return
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
751 params = self.get_params(header=header, unquote=requote)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
752 del self[header]
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
753 self[header] = type
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
754 # Skip the first param; it's the old type.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
755 for p, v in params[1:]:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
756 self.set_param(p, v, header, requote)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
757
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
758 def get_filename(self, failobj=None):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
759 """Return the filename associated with the payload if present.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
760
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
761 The filename is extracted from the Content-Disposition header's
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
762 `filename' parameter, and it is unquoted. If that header is missing
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
763 the `filename' parameter, this method falls back to looking for the
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
764 `name' parameter.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
765 """
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
766 missing = object()
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
767 filename = self.get_param('filename', missing, 'content-disposition')
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
768 if filename is missing:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
769 filename = self.get_param('name', missing, 'content-type')
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
770 if filename is missing:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
771 return failobj
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
772 return utils.collapse_rfc2231_value(filename).strip()
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
773
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
774 def get_boundary(self, failobj=None):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
775 """Return the boundary associated with the payload if present.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
776
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
777 The boundary is extracted from the Content-Type header's `boundary'
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
778 parameter, and it is unquoted.
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
779 """
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
780 missing = object()
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
781 boundary = self.get_param('boundary', missing)
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
782 if boundary is missing:
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
783 return failobj
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
784 # RFC 2046 says that boundaries may begin but not end in w/s
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diff changeset
785 return utils.collapse_rfc2231_value(boundary).rstrip()
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diff changeset
786
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diff changeset
787 def set_boundary(self, boundary):
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diff changeset
788 """Set the boundary parameter in Content-Type to 'boundary'.
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diff changeset
789
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diff changeset
790 This is subtly different than deleting the Content-Type header and
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
791 adding a new one with a new boundary parameter via add_header(). The
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diff changeset
792 main difference is that using the set_boundary() method preserves the
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
793 order of the Content-Type header in the original message.
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diff changeset
794
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diff changeset
795 HeaderParseError is raised if the message has no Content-Type header.
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diff changeset
796 """
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diff changeset
797 missing = object()
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diff changeset
798 params = self._get_params_preserve(missing, 'content-type')
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diff changeset
799 if params is missing:
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diff changeset
800 # There was no Content-Type header, and we don't know what type
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
801 # to set it to, so raise an exception.
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diff changeset
802 raise errors.HeaderParseError('No Content-Type header found')
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diff changeset
803 newparams = list()
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diff changeset
804 foundp = False
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diff changeset
805 for pk, pv in params:
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diff changeset
806 if pk.lower() == 'boundary':
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diff changeset
807 newparams.append(('boundary', '"%s"' % boundary))
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diff changeset
808 foundp = True
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diff changeset
809 else:
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diff changeset
810 newparams.append((pk, pv))
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diff changeset
811 if not foundp:
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diff changeset
812 # The original Content-Type header had no boundary attribute.
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diff changeset
813 # Tack one on the end. BAW: should we raise an exception
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diff changeset
814 # instead???
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diff changeset
815 newparams.append(('boundary', '"%s"' % boundary))
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diff changeset
816 # Replace the existing Content-Type header with the new value
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diff changeset
817 newheaders = list()
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818 for h, v in self._headers:
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diff changeset
819 if h.lower() == 'content-type':
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diff changeset
820 parts = list()
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821 for k, v in newparams:
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822 if v == '':
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diff changeset
823 parts.append(k)
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diff changeset
824 else:
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825 parts.append('%s=%s' % (k, v))
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diff changeset
826 val = SEMISPACE.join(parts)
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diff changeset
827 newheaders.append(self.policy.header_store_parse(h, val))
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diff changeset
828
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829 else:
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diff changeset
830 newheaders.append((h, v))
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diff changeset
831 self._headers = newheaders
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diff changeset
832
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diff changeset
833 def get_content_charset(self, failobj=None):
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diff changeset
834 """Return the charset parameter of the Content-Type header.
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835
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836 The returned string is always coerced to lower case. If there is no
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837 Content-Type header, or if that header has no charset parameter,
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838 failobj is returned.
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839 """
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840 missing = object()
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841 charset = self.get_param('charset', missing)
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diff changeset
842 if charset is missing:
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843 return failobj
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844 if isinstance(charset, tuple):
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diff changeset
845 # RFC 2231 encoded, so decode it, and it better end up as ascii.
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846 pcharset = charset[0] or 'us-ascii'
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diff changeset
847 try:
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diff changeset
848 # LookupError will be raised if the charset isn't known to
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diff changeset
849 # Python. UnicodeError will be raised if the encoded text
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diff changeset
850 # contains a character not in the charset.
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diff changeset
851 as_bytes = charset[2].encode('raw-unicode-escape')
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diff changeset
852 charset = str(as_bytes, pcharset)
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853 except (LookupError, UnicodeError):
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854 charset = charset[2]
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diff changeset
855 # charset characters must be in us-ascii range
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diff changeset
856 try:
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diff changeset
857 charset.encode('us-ascii')
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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858 except UnicodeError:
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diff changeset
859 return failobj
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
860 # RFC 2046, $4.1.2 says charsets are not case sensitive
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diff changeset
861 return charset.lower()
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862
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863 def get_charsets(self, failobj=None):
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
864 """Return a list containing the charset(s) used in this message.
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diff changeset
865
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diff changeset
866 The returned list of items describes the Content-Type headers'
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
867 charset parameter for this message and all the subparts in its
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diff changeset
868 payload.
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diff changeset
869
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diff changeset
870 Each item will either be a string (the value of the charset parameter
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diff changeset
871 in the Content-Type header of that part) or the value of the
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
872 'failobj' parameter (defaults to None), if the part does not have a
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diff changeset
873 main MIME type of "text", or the charset is not defined.
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diff changeset
874
d30785e31577 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
875 The list will contain one string for each part of the message, plus
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diff changeset
876 one for the container message (i.e. self), so that a non-multipart
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diff changeset
877 message will still return a list of length 1.
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878 """
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diff changeset
879 return [part.get_content_charset(failobj) for part in self.walk()]
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880
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diff changeset
881 # I.e. def walk(self): ...
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diff changeset
882 from future.backports.email.iterators import walk