def _parse_headers(self, lines):
# Passed a list of lines that make up the headers for the current msg
lastheader = ''
lastvalue = []
for lineno, line in enumerate(lines):
# Check for continuation
if line[0] in ' \t':
if not lastheader:
# The first line of the headers was a continuation. This
# is illegal, so let's note the defect, store the illegal
# line, and ignore it for purposes of headers.
defect = errors.FirstHeaderLineIsContinuationDefect(line)
self._cur.defects.append(defect)
continue
lastvalue.append(line)
continue
if lastheader:
# XXX reconsider the joining of folded lines
lhdr = EMPTYSTRING.join(lastvalue)[:-1].rstrip('\r\n')
self._cur[lastheader] = lhdr
lastheader, lastvalue = '', []
# Check for envelope header, i.e. unix-from
if line.startswith('From '):
if lineno == 0:
# Strip off the trailing newline
mo = NLCRE_eol.search(line)
if mo:
line = line[:-len(mo.group(0))]
self._cur.set_unixfrom(line)
continue
elif lineno == len(lines) - 1:
# Something looking like a unix-from at the end - it's
# probably the first line of the body, so push back the
# line and stop.
self._input.unreadline(line)
return
else:
# Weirdly placed unix-from line. Note this as a defect
# and ignore it.
defect = errors.MisplacedEnvelopeHeaderDefect(line)
self._cur.defects.append(defect)
continue
# Split the line on the colon separating field name from value.
i = line.find(':')
if i < 0:
defect = errors.MalformedHeaderDefect(line)
self._cur.defects.append(defect)
continue
lastheader = line[:i]
lastvalue = [line[i+1:].lstrip()]
# Done with all the lines, so handle the last header.
if lastheader:
# XXX reconsider the joining of folded lines
self._cur[lastheader] = EMPTYSTRING.join(lastvalue).rstrip('\r\n')
评论列表
文章目录
