flask入門4-文件上傳與郵件發(fā)送

vvpale 發(fā)布于2019-07-30 16:48 / 3082人閱讀

摘要：文件上傳郵件發(fā)送一原生文件上傳修改頭像提交文件上傳的視圖函數(shù)有文件上傳了拿到文件名稱圖片上傳保存的路徑使用和渲染文件上傳自定義一個文件上傳的表單類修改頭像文件不能為空該文件類型不允許上傳提交生成隨機的圖片名稱獲取圖片大小設(shè)置尺寸當前縮放

文件上傳郵件發(fā)送 一、原生文件上傳 form.html

    
    
        修改頭像

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()

flask入門5-model