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flask入門之文件上傳與郵件發(fā)送示例

更新時間：2018年07月18日 09:32:21 作者：rottengeek

本篇文章主要介紹了flask入門之文件上傳與郵件發(fā)送示例，小編覺得挺不錯的，現(xiàn)在分享給大家，也給大家做個參考。一起跟隨小編過來看看吧

文件上傳郵件發(fā)送

一、原生文件上傳

form.html

  <img src="{{ url_for('static',filename='img/17.jpg') }}" width="300" alt="">
  <form action="" method="post" enctype="multipart/form-data">
    <p>修改頭像 <input type="file" name="file"></p>
    <p><input type="submit" value="提交"></p>
  </form>

manage.py

#文件上傳的視圖函數(shù)
@app.route('/upload/',methods=['GET','POST'])
def icon():
  img_name = None
  if request.method == 'POST' and 'file' in request.files:
    # return '有文件上傳了'
    file = request.files.get('file')
    filename = file.filename #拿到文件名稱
    #圖片上傳保存的路徑
    imgPath = os.path.join(os.getcwd(), 'static/upload/'+filename)
    file.save(imgPath)
    img_name = filename
  return render_template('user/change_icon.html',img_name=img_name)

使用wtf和bootstrap渲染文件上傳

from flask import Flask,render_template,request
from flask_script import Manager
from flask_wtf import FlaskForm
from flask_wtf.file import FileField,FileAllowed,FileRequired
from wtforms import SubmitField
from flask_uploads import UploadSet,patch_request_class,configure_uploads,IMAGES
from flask_bootstrap import Bootstrap
import os
from PIL import Image

app = Flask(__name__)
app.config['MAX_CONTENT_LENGTH'] = 1024*1024*64
app.config['SECRET_KEY'] = 'abcdef'
app.config['UPLOADED_PHOTOS_DEST'] = os.path.join(os.getcwd(),'static/upload')
bootstrap = Bootstrap(app)
file = UploadSet('photos',IMAGES)
configure_uploads(app,file)
patch_request_class(app,size=None)
manager = Manager(app)

#自定義一個文件上傳的表單類
class File(FlaskForm):
  photos = FileField('修改頭像',validators=[FileRequired(message='文件不能為空'),FileAllowed(file,message='該文件類型不允許上傳')])
  submit = SubmitField('提交')

@app.route('/')
def index():
  return render_template('index.html')

#生成隨機的圖片名稱
def random_name(suffix,length=32):
  import string,random
  myStr = string.ascii_letters + '0123456789'
  return ''.join(random.choice(myStr) for i in range(length))+suffix

@app.route('/upload/',methods=['GET','POST'])
def icon():
  form = File()
  img_url = None
  if form.validate_on_submit():
    data = request.files.get('photos')
    suffix = os.path.splitext(data.filename)[-1]
    newName = random_name(suffix)
    file.save(data,name=newName)
    img_url = file.url(newName)

    img = Image.open(os.path.join(app.config['UPLOADED_PHOTOS_DEST'],newName))
    print(img.size) # 獲取圖片大小
    # 設(shè)置尺寸
    img.thumbnail((128, 128)) # 當前縮放不是等比縮放 變成等比縮放
    img.save(os.path.join(app.config['UPLOADED_PHOTOS_DEST'],'s_'+newName))
  return render_template('user/wtf-uplods.html',form=form,img_url=img_url)

if __name__ == '__main__':
  manager.run()

模板中的代碼

from flask import Flask,render_template,request
from flask_script import Manager
from flask_wtf import FlaskForm
from flask_wtf.file import FileField,FileAllowed,FileRequired
from wtforms import SubmitField
from flask_uploads import UploadSet,patch_request_class,configure_uploads,IMAGES
from flask_bootstrap import Bootstrap
import os
from PIL import Image

app = Flask(__name__)
app.config['MAX_CONTENT_LENGTH'] = 1024*1024*64
app.config['SECRET_KEY'] = 'abcdef'
app.config['UPLOADED_PHOTOS_DEST'] = os.path.join(os.getcwd(),'static/upload')
bootstrap = Bootstrap(app)
file = UploadSet('photos',IMAGES)
configure_uploads(app,file)
patch_request_class(app,size=None)
manager = Manager(app)

#自定義一個文件上傳的表單類
class File(FlaskForm):
  photos = FileField('修改頭像',validators=[FileRequired(message='文件不能為空'),FileAllowed(file,message='該文件類型不允許上傳')])
  submit = SubmitField('提交')

@app.route('/')
def index():
  return render_template('index.html')

#生成隨機的圖片名稱
def random_name(suffix,length=32):
  import string,random
  myStr = string.ascii_letters + '0123456789'
  return ''.join(random.choice(myStr) for i in range(length))+suffix

@app.route('/upload/',methods=['GET','POST'])
def icon():
  form = File()
  img_url = None
  if form.validate_on_submit():
    data = request.files.get('photos')
    suffix = os.path.splitext(data.filename)[-1]
    newName = random_name(suffix)
    file.save(data,name=newName)
    img_url = file.url(newName)

    img = Image.open(os.path.join(app.config['UPLOADED_PHOTOS_DEST'],newName))
    print(img.size) # 獲取圖片大小
    # 設(shè)置尺寸
    img.thumbnail((128, 128)) # 當前縮放不是等比縮放 變成等比縮放
    img.save(os.path.join(app.config['UPLOADED_PHOTOS_DEST'],'s_'+newName))
  return render_template('user/wtf-uplods.html',form=form,img_url=img_url)

if __name__ == '__main__':
  manager.run()

二、發(fā)送郵件 flask-mail

pip install flask-mail

設(shè)置臨時環(huán)境變量

windows set 名=值

Ubuntu下 export 名=值

注意：名和值都不用加引號

單線程發(fā)送郵件

from flask import Flask,render_template
from flask_script import Manager
from flask_mail import Mail,Message
import os

app = Flask(__name__)
app.config['MAIL_SERVER'] = 'smtp.163.com'
# 為了保密 將郵箱賬號和授權(quán)碼都加入到了臨時環(huán)境變量中
app.config['MAIL_USERNAME'] = os.environ.get('MAIL_USERNAME')
app.config['MAIL_PASSWORD'] = os.environ.get('MAIL_PASSWORD')

mail = Mail(app)
manager = Manager(app)

@app.route('/send_mail/')
def send_mail():
  msg = Message(subject='大郎',recipients=['793390457@qq.com'],sender=app.config['MAIL_USERNAME'])
  msg.html = render_template('email/activate.html',username='大郎')
  mail.send(message=msg)
  return '發(fā)送郵件'

if __name__ == '__main__':
  manager.run()

異步發(fā)送郵件

from flask import Flask,render_template
from flask_script import Manager
from flask_mail import Mail,Message
import os
from threading import Thread

app = Flask(__name__)
app.config['MAIL_SERVER'] = 'smtp.163.com'
app.config['MAIL_USERNAME'] = os.environ.get('MAIL_USERNAME')
app.config['MAIL_PASSWORD'] = os.environ.get('MAIL_PASSWORD')

mail = Mail(app)
manager = Manager(app)

@app.route('/send_mail/')
def send_mail():
  msg = Message(subject='大郎',recipients=['793390457@qq.com'],sender=app.config['MAIL_USERNAME'])
  msg.html = render_template('email/activate.html',username='大郎')
  thr = Thread(target=async_send_mail,args=(msg,)) #創(chuàng)建線程 參數(shù)1為創(chuàng)建子線程 參數(shù)2為傳遞參數(shù) 類型為元組
  thr.start() #開啟線程
  return '發(fā)送郵件'

def async_send_mail(msg):
  #開啟程序上下文 把當前請求 作為同一個請求
  with app.app_context():
    mail.send(message=msg)

if __name__ == '__main__':
  manager.run()

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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