7.Flask文件上传

 1.1.上传文件和访问上传的文件

upload_file_demo.py

from flask import Flask,request,render_template import os from werkzeug.utils import secure_filename from flask import send_from_directory app = Flask(__name__) #新建images文件夹，UPLOAD_PATH就是images的路径
UPLOAD_PATH = os.path.join(os.path.dirname(__file__),'images') @app.route('/upload/',methods=['GET','POST']) def settings(): if request.method == 'GET': return render_template('upload.html') else: desc = request.form.get('desc') avatar = request.files.get('avatar') # 对文件名进行包装，为了安全,不过对中文的文件名显示有问题
        filename = secure_filename(avatar.filename) avatar.save(os.path.join(UPLOAD_PATH,filename)) print(desc) return '文件上传成功'

#访问上传的文件 #浏览器访问：http://127.0.0.1:5000/images/django.jpg/ 就能够查看文件了
@app.route('/images/<filename>/',methods=['GET','POST']) def get_image(filename): return send_from_directory(UPLOAD_PATH,filename) @app.route('/') def hello_world(): return 'Hello World!'

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

upload.html

<form action="" method="post" enctype="multipart/form-data">
    <table>
        <tbody>
            <tr>
                <td>头像：</td>
                <td><input type="file" name="avatar"></td>
            </tr>
            <tr>
                <td>描述：</td>
                <td><input type="text" name="desc"></td>
            </tr>
            <tr>
                <td><input type="submit" value="提交"></td>
            </tr>
        </tbody>
    </table>
</form>

 

1.2.使用flask-wtf验证上传的文件

forms.py

from wtforms import Form,FileField,StringField from wtforms.validators import InputRequired from flask_wtf.file import FileRequired,FileAllowed class UploadForm(Form): avatar = FileField(validators=[FileRequired(),       #FileRequired必须上传
                                   FileAllowed(['jpg','png','gif'])     #FileAllowed:必须为指定的格式的文件
 ]) desc = StringField(validators=[InputRequired()])

upload_file_demo.py

from flask import Flask, request, render_template import os from werkzeug.utils import secure_filename from flask import send_from_directory from forms import UploadForm from werkzeug.datastructures import CombinedMultiDict app = Flask(__name__) # 新建images文件夹，UPLOAD_PATH就是images的路径
UPLOAD_PATH = os.path.join(os.path.dirname(__file__), 'images') @app.route('/upload/', methods=['GET', 'POST']) def settings(): if request.method == 'GET': return render_template('upload.html') else: # 文件是从request,files里面获取，这里使用CombinedMultiDict把form和file的数据组合起来，一块儿验证
        form = UploadForm(CombinedMultiDict([request.form, request.files])) if form.validate(): desc = request.form.get('desc') avatar = request.files.get('avatar') # 对文件名进行包装，为了安全,不过对中文的文件名显示有问题
            filename = secure_filename(avatar.filename) avatar.save(os.path.join(UPLOAD_PATH, filename)) print(desc) return '文件上传成功'
        else: print(form.errors) return "fail"


# 访问上传的文件 # 浏览器访问：http://127.0.0.1:5000/images/django.jpg/ 就能够查看文件了
@app.route('/images/<filename>/', methods=['GET', 'POST']) def get_image(filename): return send_from_directory(UPLOAD_PATH, filename) @app.route('/') def hello_world(): return 'Hello World!'


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