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Change by Andrew Kuchling (edited by Guido):

Browse source 
Removed unused import tempfile.

Added some docstrings.
This commit is contained in:
Guido van Rossum 1997-03-25 21:58:08 +00:00
parent 31ef35b861
commit bfc3944bfd
1 changed files with 32 additions and 17 deletions
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49
Lib/mailcap.py
View file

@ -1,13 +1,18 @@
# Mailcap file handling. See RFC 1524.
"""Mailcap file handling. See RFC 1524."""
import os
import string
import tempfile
# Part 1: top-level interface.
def getcaps():
"""Return a dictionary containing the mailcap database.
The dictionary maps a MIME type (in all lowercase,
e.g. 'text/plain') to a list of corresponding mailcap entries.
"""
caps = {}
for mailcap in listmailcapfiles():
try:
@ -24,6 +29,7 @@ def getcaps():
return caps
def listmailcapfiles():
"""Return a list of all mailcap files found on the system."""
# XXX Actually, this is Unix-specific
if os.environ.has_key('MAILCAPS'):
str = os.environ['MAILCAPS']
@ -112,30 +118,39 @@ def parsefield(line, i, n):
# Part 3: using the database.
def findmatch(caps, type, key='view', filename="/dev/null", plist=[]):
entries = lookup(caps, type, key)
def findmatch(caps, MIMEtype, key='view', filename="/dev/null", plist=[]):
"""Find a match for a mailcap entry.
Return a tuple containing the command line, and the mailcap entry
used; (None, None) if no match is found. This may invoke the
'test' command of several matching entries before deciding which
entry to use.
"""
entries = lookup(caps, MIMEtype, key)
# XXX This code should somehow check for the needsterminal flag.
for e in entries:
if e.has_key('test'):
test = subst(e['test'], filename, plist)
if test and os.system(test) != 0:
continue
command = subst(e[key], type, filename, plist)
command = subst(e[key], MIMEtype, filename, plist)
return command, e
return None, None
def lookup(caps, type, key=None):
def lookup(caps, MIMEtype, key=None):
entries = []
if caps.has_key(type):
entries = entries + caps[type]
types = string.splitfields(type, '/')
type = types[0] + '/*'
if caps.has_key(type):
entries = entries + caps[type]
if caps.has_key(MIMEtype):
entries = entries + caps[MIMEtype]
MIMEtypes = string.splitfields(MIMEtype, '/')
MIMEtype = MIMEtypes[0] + '/*'
if caps.has_key(MIMEtype):
entries = entries + caps[MIMEtype]
if key is not None:
entries = filter(lambda e, key=key: e.has_key(key), entries)
return entries
def subst(field, type, filename, plist=[]):
def subst(field, MIMEtype, filename, plist=[]):
# XXX Actually, this is Unix-specific
res = ''
i, n = 0, len(field)
@ -152,7 +167,7 @@ def subst(field, type, filename, plist=[]):
elif c == 's':
res = res + filename
elif c == 't':
res = res + type
res = res + MIMEtype
elif c == '{':
start = i
while i < n and field[i] <> '}':
@ -187,11 +202,11 @@ def test():
for i in range(1, len(sys.argv), 2):
args = sys.argv[i:i+2]
if len(args) < 2:
print "usage: mailcap [type file] ..."
print "usage: mailcap [MIMEtype file] ..."
return
type = args[0]
MIMEtype = args[0]
file = args[1]
command, e = findmatch(caps, type, 'view', file)
command, e = findmatch(caps, MIMEtype, 'view', file)
if not command:
print "No viewer found for", type
else: