Flash send email

Flask mail

be based on web Applications often need to have the ability to communicate to users / Function of sending mail by client .

Flask-Mail The extension makes it very easy to establish a simple interface with any e-mail server .

First , belong pip Install with the help of the utility Flask-Mail Expand .

pip3 install Flask-Mail

Then you need to configure it by setting the values of the following application parameters Flask-Mail.

Method	describe
MAIL_SERVER	The name of the e-mail server /IP Address
MAIL_PORT	The port number of the server used
MAIL_PORT	Enable / Disable transport security layer encryption
MAIL_USE_SSL	Enable / Disable secure socket layer encryption
MAIL_DEBUG	Debugging support . The default value is Flask Debug state of the application
MAIL_USERNAME	The user name of the sender
MAIL_PASSWORD	The sender's password
MAIL_DEFAULT_SENDER	Set the default sender
MAIL_MAX_EMAILS	Set the maximum number of messages to send
MAIL_SUPPRESS_SEND	If app.testing Set to true, Then the transmission is suppressed
MAIL_ASCII_ATTACHMENTS	If set to true, Then the attached file name will be converted to ASCII

flask-mail Modules contain definitions of the following important classes .

Method	describe
send()	send out Message The content of the class object
connect()	Open the connection to the mail host
send_message()	Send message to

Message class

It encapsulates an email .Message The class constructor has several parameters :

flask - mail.Message(subject, recipients, body, html, sender, cc, bcc,
                     reply - to, date, charset, extra_headers, mail_options, rcpt_options)

Message Class method

attach() - Add an attachment to the message . This method uses the following parameters ：

filename - The name of the file to attach

content_type - MIME Files of type

data - Raw file data

Management - Content handling （ If any ）.

add_recipient() - Add another recipient to the message

Use Flask-Mail

step 1 - In code from flask-mail Module import Mail and Message class .

from flask_mail import Mail, Message

step 2 - Then configure... According to the following settings Flask-Mail.

app.config['MAIL_SERVER'] = 'smtp.exmail.qq.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USERNAME'] = '***@***.io'
app.config['MAIL_PASSWORD'] = '******'
app.config['MAIL_USE_SSL'] = True

step 3 - establish Mail Class .

mail = Mail(app)

step 4 - In by URL The rules （‘/’） The mapping of Python Function Message object .

@app.route("/")
def index():
    msg = Message('Hello', sender='**@**.com', recipients=['**@**.com'])
    msg.body = "This is the email body"
    mail.send(msg)
    return "Sent"

step 5 - stay python Use in a function attach() Method

with app.open_resource('upload/flask.png') as f:
    msg.attach('flask.png', 'image/png', f.read())

complete python Code

from flask import Flask
from flask_mail import Mail, Message

app = Flask(__name__)
mail = Mail(app)

app.config['MAIL_SERVER'] = 'smtp.exmail.qq.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USERNAME'] = '***@***.io'
app.config['MAIL_PASSWORD'] = '******'
app.config['MAIL_USE_SSL'] = True
mail = Mail(app)


@app.route("/")
def index():
    msg = Message('Hello', sender='**@**.com', recipients=['**@**.com'])
    msg.body = "Hello Flask message sent from Flask-Mail"
    #  Add attachments 
    with app.open_resource('upload/flask.png') as f:
        msg.attach('flask.png', 'image/png', f.read())
    mail.send(msg)
    return "Sent"


if __name__ == '__main__':
    app.run(debug=True)