email
: Ví dụ Jo
Dưới đây là một vài ví dụ về cách sử dụng gói email
để đọc, viết và gửi tin nhắn email đơn giản, cũng như các tin nhắn MIME phức tạp hơn.
Trước tiên, hãy để Lừa xem cách tạo và gửi một tin nhắn văn bản đơn giản [cả nội dung văn bản và địa chỉ có thể chứa các ký tự Unicode]:
# Import smtplib for the actual sending function import smtplib # Import the email modules we'll need from email.message import EmailMessage # Open the plain text file whose name is in textfile for reading. with open[textfile] as fp: # Create a text/plain message msg = EmailMessage[] msg.set_content[fp.read[]] # me == the sender's email address # you == the recipient's email address msg['Subject'] = f'The contents of {textfile}' msg['From'] = me msg['To'] = you # Send the message via our own SMTP server. s = smtplib.SMTP['localhost'] s.send_message[msg] s.quit[]
Tiêu đề phân tích cú pháp RFC 822 có thể dễ dàng được thực hiện bằng cách sử dụng các lớp từ mô -đun
# Import the email modules we'll need from email.parser import BytesParser, Parser from email.policy import default # If the e-mail headers are in a file, uncomment these two lines: # with open[messagefile, 'rb'] as fp: # headers = BytesParser[policy=default].parse[fp] # Or for parsing headers in a string [this is an uncommon operation], use: headers = Parser[policy=default].parsestr[ 'From: Foo Bar \n' 'To: \n' 'Subject: Test message\n' '\n' 'Body would go here\n'] # Now the header items can be accessed as a dictionary: print['To: {}'.format[headers['to']]] print['From: {}'.format[headers['from']]] print['Subject: {}'.format[headers['subject']]] # You can also access the parts of the addresses: print['Recipient username: {}'.format[headers['to'].addresses[0].username]] print['Sender name: {}'.format[headers['from'].addresses[0].display_name]]0:RFC 822 headers can easily be done by the using the classes from the
# Import the email modules we'll need from email.parser import BytesParser, Parser from email.policy import default # If the e-mail headers are in a file, uncomment these two lines: # with open[messagefile, 'rb'] as fp: # headers = BytesParser[policy=default].parse[fp] # Or for parsing headers in a string [this is an uncommon operation], use: headers = Parser[policy=default].parsestr[ 'From: Foo Bar \n' 'To: \n' 'Subject: Test message\n' '\n' 'Body would go here\n'] # Now the header items can be accessed as a dictionary: print['To: {}'.format[headers['to']]] print['From: {}'.format[headers['from']]] print['Subject: {}'.format[headers['subject']]] # You can also access the parts of the addresses: print['Recipient username: {}'.format[headers['to'].addresses[0].username]] print['Sender name: {}'.format[headers['from'].addresses[0].display_name]]0 module:
# Import the email modules we'll need from email.parser import BytesParser, Parser from email.policy import default # If the e-mail headers are in a file, uncomment these two lines: # with open[messagefile, 'rb'] as fp: # headers = BytesParser[policy=default].parse[fp] # Or for parsing headers in a string [this is an uncommon operation], use: headers = Parser[policy=default].parsestr[ 'From: Foo Bar \n' 'To: \n' 'Subject: Test message\n' '\n' 'Body would go here\n'] # Now the header items can be accessed as a dictionary: print['To: {}'.format[headers['to']]] print['From: {}'.format[headers['from']]] print['Subject: {}'.format[headers['subject']]] # You can also access the parts of the addresses: print['Recipient username: {}'.format[headers['to'].addresses[0].username]] print['Sender name: {}'.format[headers['from'].addresses[0].display_name]]
Dưới đây, một ví dụ về cách gửi tin nhắn MIME chứa một loạt các hình ảnh gia đình có thể đang nằm trong một thư mục:
# Import smtplib for the actual sending function import smtplib # And imghdr to find the types of our images import imghdr # Here are the email package modules we'll need from email.message import EmailMessage # 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. for file in pngfiles: with open[file, 'rb'] as fp: 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. with smtplib.SMTP['localhost'] as s: s.send_message[msg]
Dưới đây, một ví dụ về cách gửi toàn bộ nội dung của thư mục dưới dạng email: 1
#!/usr/bin/env python3 """Send the contents of a directory as a MIME message.""" import os import smtplib # For guessing MIME type based on file name extension import mimetypes from argparse import ArgumentParser from email.message import EmailMessage from email.policy import SMTP def main[]: 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 if not directory: 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' for filename in os.listdir[directory]: path = os.path.join[directory, filename] if not os.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] if ctype is None or encoding is not None: # 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] with open[path, 'rb'] as fp: msg.add_attachment[fp.read[], maintype=maintype, subtype=subtype, filename=filename] # Now send or store the message if args.output: with open[args.output, 'wb'] as fp: fp.write[msg.as_bytes[policy=SMTP]] else: with smtplib.SMTP['localhost'] as s: s.send_message[msg] if __name__ == '__main__': main[]
Dưới đây, một ví dụ về cách giải nén thông báo MIME như tin nhắn ở trên, vào thư mục của các tệp:
#!/usr/bin/env python3 """Unpack a MIME message into a directory of files.""" import os import email import mimetypes from email.policy import default from argparse import ArgumentParser def main[]: 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[] with open[args.msgfile, 'rb'] as fp: msg = email.message_from_binary_file[fp, policy=default] try: os.mkdir[args.directory] except FileExistsError: pass counter = 1 for part in msg.walk[]: # multipart/* are just containers if part.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[] if not filename: ext = mimetypes.guess_extension[part.get_content_type[]] if not ext: # Use a generic bag-of-bits extension ext = '.bin' filename = f'part-{counter:03d}{ext}' counter += 1 with open[os.path.join[args.directory, filename], 'wb'] as fp: fp.write[part.get_payload[decode=True]] if __name__ == '__main__': main[]
Ở đây, một ví dụ về cách tạo thông báo HTML với phiên bản văn bản đơn giản thay thế. Để làm cho mọi thứ thú vị hơn một chút, chúng tôi bao gồm một hình ảnh liên quan trong phần HTML và chúng tôi lưu một bản sao của những gì chúng tôi sẽ gửi đến đĩa, cũng như gửi nó.
#!/usr/bin/env python3 import smtplib from email.message import EmailMessage from email.headerregistry import Address from email.utils import make_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] //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["""\Salut!
Cela ressemble à un excellent
recipie déjeuner. """.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. with open["roasted-asparagus.jpg", 'rb'] as img: msg.get_payload[][1].add_related[img.read[], 'image', 'jpeg', cid=asparagus_cid] # Make a local copy of what we are going to send. with open['outgoing.msg', 'wb'] as f: f.write[bytes[msg]] # Send the message via local SMTP server. with smtplib.SMTP['localhost'] as s: s.send_message[msg]
Nếu chúng tôi được gửi tin nhắn từ ví dụ cuối cùng, đây là một cách chúng tôi có thể xử lý nó:
import os import sys import tempfile import mimetypes import webbrowser # Import the email modules we'll need from email import policy from email.parser import BytesParser def magic_html_parser[html_text, partfiles]: """Return safety-sanitized html linked to partfiles. Rewrite the href="cid:...." attributes to point to the filenames in partfiles. Though not trivial, this should be possible using html.parser. """ raise NotImplementedError["Add the magic needed"] # In a real program you'd get the filename from the arguments. with open['outgoing.msg', 'rb'] as fp: 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?"] if ans.lower[][0] == 'n': sys.exit[] # We can extract the richest alternative in order to display it: richest = msg.get_body[] partfiles = {} if richest['content-type'].maintype == 'text': if richest['content-type'].subtype == 'plain': for line in richest.get_content[].splitlines[]: print[line] sys.exit[] elif richest['content-type'].subtype == 'html': body = richest else: print["Don't know how to display {}".format[richest.get_content_type[]]] sys.exit[] elif richest['content-type'].content_type == 'multipart/related': body = richest.get_body[preferencelist=['html']] for part in richest.iter_attachments[]: fn = part.get_filename[] if fn: extension = os.path.splitext[part.get_filename[]][1] else: extension = mimetypes.guess_extension[part.get_content_type[]] with tempfile.NamedTemporaryFile[suffix=extension, delete=False] as f: 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[] with tempfile.NamedTemporaryFile[mode='w', delete=False] as f: f.write[magic_html_parser[body.get_content[], partfiles]] webbrowser.open[f.name] os.remove[f.name] for fn in partfiles.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.
Cho đến lời nhắc, đầu ra từ trên là:
To: Penelope Pussycat , Fabrette Pussycat From: Pepé Le Pew Subject: Ayons asperges pour le déjeuner Salut! Cela ressemble à un excellent recipie[1] déjeuner.
Chú thích
1Cảm ơn Matthew Dixon Cowles vì cảm hứng và ví dụ ban đầu.