Pythonemail示例

# Import smtplib for the actual sending function
importsmtplib
# And imghdr to find the types of our images
importimghdr
# Here are the email package modules we'll need
fromemail.messageimportEmailMessage
# Create the container email message.
msg=EmailMessage()
msg['Subject']='Our family reunion'
# me == the sender's email address
# family = the list of all recipients' email addresses
msg['From']=me
msg['To']=', '.join(family)
msg.preamble='You will not see this in a MIME-aware mail reader.\n'
# Open the files in binary mode.  Use imghdr to figure out the
# MIME subtype for each specific image.
forfileinpngfiles:
withopen(file,'rb')asfp:
img_data=fp.read()
msg.add_attachment(img_data,maintype='image',
subtype=imghdr.what(None,img_data))
# Send the email via our own SMTP server.
withsmtplib.SMTP('localhost')ass:
s.send_message(msg)

#!/usr/bin/env python3
"""Send the contents of a directory as a MIME message."""
importos
importsmtplib
# For guessing MIME type based on file name extension
importmimetypes
fromargparseimportArgumentParser
fromemail.messageimportEmailMessage
fromemail.policyimportSMTP
defmain():
parser=ArgumentParser(description="""\
Send the contents of a directory as a MIME message.
Unless the -o option is given, the email is sent by forwarding to your local
SMTP server, which then does the normal delivery process.  Your local machine
must be running an SMTP server.
""")
parser.add_argument('-d','--directory',
help="""Mail the contents of the specified directory,
                        otherwise use the current directory.  Only the regular
                        files in the directory are sent, and we don't recurse to
                        subdirectories.""")
parser.add_argument('-o','--output',
metavar='FILE',
help="""Print the composed message to FILE instead of
                        sending the message to the SMTP server.""")
parser.add_argument('-s','--sender',required=True,
help='The value of the From: header (required)')
parser.add_argument('-r','--recipient',required=True,
action='append',metavar='RECIPIENT',
default=[],dest='recipients',
help='A To: header value (at least one required)')
args=parser.parse_args()
directory=args.directory
ifnotdirectory:
directory='.'
# Create the message
msg=EmailMessage()
msg['Subject']=f'Contents of directory {os.path.abspath(directory)}'
msg['To']=', '.join(args.recipients)
msg['From']=args.sender
msg.preamble='You will not see this in a MIME-aware mail reader.\n'
forfilenameinos.listdir(directory):
path=os.path.join(directory,filename)
ifnotos.path.isfile(path):
continue
# Guess the content type based on the file's extension.  Encoding
# will be ignored, although we should check for simple things like
# gzip'd or compressed files.
ctype,encoding=mimetypes.guess_type(path)
ifctypeisNoneorencodingisnotNone:
# No guess could be made, or the file is encoded (compressed), so
# use a generic bag-of-bits type.
ctype='application/octet-stream'
maintype,subtype=ctype.split('/',1)
withopen(path,'rb')asfp:
msg.add_attachment(fp.read(),
maintype=maintype,
subtype=subtype,
filename=filename)
# Now send or store the message
ifargs.output:
withopen(args.output,'wb')asfp:
fp.write(msg.as_bytes(policy=SMTP))
else:
withsmtplib.SMTP('localhost')ass:
s.send_message(msg)
if__name__=='__main__':
main()

#!/usr/bin/env python3
"""Unpack a MIME message into a directory of files."""
importos
importemail
importmimetypes
fromemail.policyimportdefault
fromargparseimportArgumentParser
defmain():
parser=ArgumentParser(description="""\
Unpack a MIME message into a directory of files.
""")
parser.add_argument('-d','--directory',required=True,
help="""Unpack the MIME message into the named
                        directory, which will be created if it doesn't already
                        exist.""")
parser.add_argument('msgfile')
args=parser.parse_args()
withopen(args.msgfile,'rb')asfp:
msg=email.message_from_binary_file(fp,policy=default)
try:
os.mkdir(args.directory)
exceptFileExistsError:
pass
counter=1
forpartinmsg.walk():
# multipart/* are just containers
ifpart.get_content_maintype()=='multipart':
continue
# Applications should really sanitize the given filename so that an
# email message can't be used to overwrite important files
filename=part.get_filename()
ifnotfilename:
ext=mimetypes.guess_extension(part.get_content_type())
ifnotext:
# Use a generic bag-of-bits extension
ext='.bin'
filename=f'part-{counter:03d}{ext}'
counter+=1
withopen(os.path.join(args.directory,filename),'wb')asfp:
fp.write(part.get_payload(decode=True))
if__name__=='__main__':
main()

#!/usr/bin/env python3
importsmtplib
fromemail.messageimportEmailMessage
fromemail.headerregistryimportAddress
fromemail.utilsimportmake_msgid
# Create the base text message.
msg=EmailMessage()
msg['Subject']="Ayons asperges pour le déjeuner"
msg['From']=Address("Pepé Le Pew","pepe","example.com")
msg['To']=(Address("Penelope Pussycat","penelope","example.com"),
Address("Fabrette Pussycat","fabrette","example.com"))
msg.set_content("""\
Salut!
Cela ressemble à un excellent recipie[1] déjeuner.
[1] http://www.yummly.com/recipe/Roasted-Asparagus-Epicurious-203718
--Pepé
""")
# Add the html version.  This converts the message into a multipart/alternative
# container, with the original text message as the first part and the new html
# message as the second part.
asparagus_cid=make_msgid()
msg.add_alternative("""\
<html>
  <head></head>
  <body>
    <p>Salut!</p>
    <p>Cela ressemble à un excellent
        <a href="http://www.yummly.com/recipe/Roasted-Asparagus-Epicurious-203718">
            recipie
        </a> déjeuner.
    </p>
    <img src="cid:{asparagus_cid}" />
  </body>
</html>
""".format(asparagus_cid=asparagus_cid[1:-1]),subtype='html')
# note that we needed to peel the <> off the msgid for use in the html.
# Now add the related image to the html part.
withopen("roasted-asparagus.jpg",'rb')asimg:
msg.get_payload()[1].add_related(img.read(),'image','jpeg',
cid=asparagus_cid)
# Make a local copy of what we are going to send.
withopen('outgoing.msg','wb')asf:
f.write(bytes(msg))
# Send the message via local SMTP server.
withsmtplib.SMTP('localhost')ass:
s.send_message(msg)

importos
importsys
importtempfile
importmimetypes
importwebbrowser
# Import the email modules we'll need
fromemailimportpolicy
fromemail.parserimportBytesParser
# An imaginary module that would make this work and be safe.
fromimaginaryimportmagic_html_parser
# In a real program you'd get the filename from the arguments.
withopen('outgoing.msg','rb')asfp:
msg=BytesParser(policy=policy.default).parse(fp)
# Now the header items can be accessed as a dictionary, and any non-ASCII will
# be converted to unicode:
print('To:',msg['to'])
print('From:',msg['from'])
print('Subject:',msg['subject'])
# If we want to print a preview of the message content, we can extract whatever
# the least formatted payload is and print the first three lines.  Of course,
# if the message has no plain text part printing the first three lines of html
# is probably useless, but this is just a conceptual example.
simplest=msg.get_body(preferencelist=('plain','html'))
print()
print(''.join(simplest.get_content().splitlines(keepends=True)[:3]))
ans=input("View full message?")
ifans.lower()[0]=='n':
sys.exit()
# We can extract the richest alternative in order to display it:
richest=msg.get_body()
partfiles={}
ifrichest['content-type'].maintype=='text':
ifrichest['content-type'].subtype=='plain':
forlineinrichest.get_content().splitlines():
print(line)
sys.exit()
elifrichest['content-type'].subtype=='html':
body=richest
else:
print("Don't know how to display {}".format(richest.get_content_type()))
sys.exit()
elifrichest['content-type'].content_type=='multipart/related':
body=richest.get_body(preferencelist=('html'))
forpartinrichest.iter_attachments():
fn=part.get_filename()
iffn:
extension=os.path.splitext(part.get_filename())[1]
else:
extension=mimetypes.guess_extension(part.get_content_type())
withtempfile.NamedTemporaryFile(suffix=extension,delete=False)asf:
f.write(part.get_content())
# again strip the <> to go from email form of cid to html form.
partfiles[part['content-id'][1:-1]]=f.name
else:
print("Don't know how to display {}".format(richest.get_content_type()))
sys.exit()
withtempfile.NamedTemporaryFile(mode='w',delete=False)asf:
# The magic_html_parser has to rewrite the href="cid:...." attributes to
# point to the filenames in partfiles.  It also has to do a safety-sanitize
# of the html.  It could be written using html.parser.
f.write(magic_html_parser(body.get_content(),partfiles))
webbrowser.open(f.name)
os.remove(f.name)
forfninpartfiles.values():
os.remove(fn)
# Of course, there are lots of email messages that could break this simple
# minded program, but it will handle the most common ones.