Python 3 的更新示例和 GMail 的当前 API，如下所示。
请注意，要获取下面的credentials.json 文件，您需要在选择相关的 GCP 项目后创建一个 Oauth 客户端 ID 凭据 here。创建后，您将看到客户端密钥和客户端密码。关闭该提示，然后单击帐户旁边的向下箭头。这是您需要的文件。
import base64
import logging
import mimetypes
import os
import os.path
import pickle
from email.mime.text import MIMEText
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from googleapiclient import errors
from googleapiclient.discovery import build
def get_service():
"""Gets an authorized Gmail API service instance.
Returns:
An authorized Gmail API service instance..
"""
# If modifying these scopes, delete the file token.pickle.
SCOPES = [
'https://www.googleapis.com/auth/gmail.readonly',
'https://www.googleapis.com/auth/gmail.send',
]
creds = None
# The file token.pickle stores the user's access and refresh tokens, and is
# created automatically when the authorization flow completes for the first
# time.
if os.path.exists('token.pickle'):
with open('token.pickle', 'rb') as token:
creds = pickle.load(token)
# If there are no (valid) credentials available, let the user log in.
if not creds or not creds.valid:
if creds and creds.expired and creds.refresh_token:
creds.refresh(Request())
else:
flow = InstalledAppFlow.from_client_secrets_file(
'credentials.json', SCOPES)
creds = flow.run_local_server(port=0)
# Save the credentials for the next run
with open('token.pickle', 'wb') as token:
pickle.dump(creds, token)
service = build('gmail', 'v1', credentials=creds)
return service
def send_message(service, sender, message):
"""Send an email message.
Args:
service: Authorized Gmail API service instance.
user_id: User's email address. The special value "me"
can be used to indicate the authenticated user.
message: Message to be sent.
Returns:
Sent Message.
"""
try:
sent_message = (service.users().messages().send(userId=sender, body=message)
.execute())
logging.info('Message Id: %s', sent_message['id'])
return sent_message
except errors.HttpError as error:
logging.error('An HTTP error occurred: %s', error)
def create_message(sender, to, subject, message_text):
"""Create a message for an email.
Args:
sender: Email address of the sender.
to: Email address of the receiver.
subject: The subject of the email message.
message_text: The text of the email message.
Returns:
An object containing a base64url encoded email object.
"""
message = MIMEText(message_text)
message['to'] = to
message['from'] = sender
message['subject'] = subject
s = message.as_string()
b = base64.urlsafe_b64encode(s.encode('utf-8'))
return {'raw': b.decode('utf-8')}
if __name__ == '__main__':
logging.basicConfig(
format="[%(levelname)s] %(message)s",
level=logging.INFO
)
try:
service = get_service()
message = create_message("from@gmail.com", "to@gmail.com", "Test subject", "Test body")
send_message(service, "from@gmail.com", message)
except Exception as e:
logging.error(e)
raise