flask入门_flask入门之文件上传与邮件发送示例

时间:2024-05-14  来源:邮件  阅读:

文件上传邮件发送

一、原生文件上传

form.html

  
  

修改头像

manage.py

#文件上传的视图函数
@app.route("/upload/",methods=["GET","POST"])
def icon():
  img_name = None
  if request.method == "POST" and "file" in request.files:
    # return "有文件上传了"
    file = request.files.get("file")
    filename = file.filename #拿到文件名称
    #图片上传保存的路径
    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渲染文件上传

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)

#自定义一个文件上传的表单类
class File(FlaskForm):
  photos = FileField("修改头像",validators=[FileRequired(message="文件不能为空"),FileAllowed(file,message="该文件类型不允许上传")])
  submit = SubmitField("提交")

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

#生成随机的图片名称
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) # 获取图片大小
    # 设置尺寸
    img.thumbnail((128, 128)) # 当前缩放不是等比缩放 变成等比缩放
    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()

模板中的代码

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)

#自定义一个文件上传的表单类
class File(FlaskForm):
  photos = FileField("修改头像",validators=[FileRequired(message="文件不能为空"),FileAllowed(file,message="该文件类型不允许上传")])
  submit = SubmitField("提交")

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

#生成随机的图片名称
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) # 获取图片大小
    # 设置尺寸
    img.thumbnail((128, 128)) # 当前缩放不是等比缩放 变成等比缩放
    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、发送邮件 flask-mail

pip install flask-mail

设置临时环境变量

windows set 名=值

Ubuntu下 export 名=值

注意: 名和值都不用加引号

单线程发送邮件

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"
# 为了保密 将邮箱账号和授权码都加入到了临时环境变量中
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 "发送邮件"

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

异步发送邮件

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,)) #创建线程 参数1为创建子线程 参数2为传递参数 类型为元组
  thr.start() #开启线程
  return "发送邮件"

def async_send_mail(msg):
  #开启程序上下文 把当前请求 作为同一个请求
  with app.app_context():
    mail.send(message=msg)

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

flask入门_flask入门之文件上传与邮件发送示例

http://m.bbyears.com/jsp/154055.html

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