flask入门之文件上传与邮件发送示例

2023-09-10 04:28:04 148

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'])
deficon():
img_name=None
ifrequest.method=='POST'and'file'inrequest.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
returnrender_template('user/change_icon.html',img_name=img_name)

使用wtf和bootstrap渲染文件上传

fromflaskimportFlask,render_template,request
fromflask_scriptimportManager
fromflask_wtfimportFlaskForm
fromflask_wtf.fileimportFileField,FileAllowed,FileRequired
fromwtformsimportSubmitField
fromflask_uploadsimportUploadSet,patch_request_class,configure_uploads,IMAGES
fromflask_bootstrapimportBootstrap
importos
fromPILimportImage

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
classFile(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('/')
defindex():
returnrender_template('index.html')

#生成随机的图片名称
defrandom_name(suffix,length=32):
importstring,random
myStr=string.ascii_letters+'0123456789'
return''.join(random.choice(myStr)foriinrange(length))+suffix

@app.route('/upload/',methods=['GET','POST'])
deficon():
form=File()
img_url=None
ifform.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))
returnrender_template('user/wtf-uplods.html',form=form,img_url=img_url)

if__name__=='__main__':
manager.run()

模板中的代码

fromflaskimportFlask,render_template,request
fromflask_scriptimportManager
fromflask_wtfimportFlaskForm
fromflask_wtf.fileimportFileField,FileAllowed,FileRequired
fromwtformsimportSubmitField
fromflask_uploadsimportUploadSet,patch_request_class,configure_uploads,IMAGES
fromflask_bootstrapimportBootstrap
importos
fromPILimportImage

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
classFile(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('/')
defindex():
returnrender_template('index.html')

#生成随机的图片名称
defrandom_name(suffix,length=32):
importstring,random
myStr=string.ascii_letters+'0123456789'
return''.join(random.choice(myStr)foriinrange(length))+suffix

@app.route('/upload/',methods=['GET','POST'])
deficon():
form=File()
img_url=None
ifform.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))
returnrender_template('user/wtf-uplods.html',form=form,img_url=img_url)

if__name__=='__main__':
manager.run()

二、发送邮件flask-mail

pipinstallflask-mail

设置临时环境变量

windowsset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

fromflaskimportFlask,render_template
fromflask_scriptimportManager
fromflask_mailimportMail,Message
importos

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/')
defsend_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

fromflaskimportFlask,render_template
fromflask_scriptimportManager
fromflask_mailimportMail,Message
importos
fromthreadingimportThread

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/')
defsend_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'

defasync_send_mail(msg):
#开启程序上下文把当前请求作为同一个请求
withapp.app_context():
mail.send(message=msg)

if__name__=='__main__':
manager.run()

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

flask入门之文件上传与邮件发送示例

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