在使用flask定义路由完成文件上传时，定义upload视图函数
from flask import Flask, render_template
from werkzeug.utils import secure_filename
import os
app = Flask(__name__)
app.debug = True
app.secret_key = 'helloworld!!'
@app.route('/')
def hello_world():
return 'Hello World!'
@app.route('/upload',methods=['GET','POST'])
def upload():
if request.method == 'POST':
f = request.files['file']
base_path = os.path.abspath(os.path.dirname(__file__))
upload_path = os.path.join(base_path,'static\uploads')
f.save(upload_path,secure_filename(f.filename))
return "文件上传成功!!"
return render_template('upload.html')
@app.errorhandler(404)
def page_not_found(error):
return render_template('404.html'),404
if __name__ == '__main__':
app.run(debug=True)upload.html前端页面的内容为
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>文件上传</title>
</head>
<body>
<h1>文件上传示例</h1>
<form action="" method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="上传">
</form>
</body>
</html>启动项目，用浏览器打开http://127.0.0.1:5000/upload页面，前端页面显示如图所示
选择要上传的文件
文件选择完毕后，点击上传，flask会抛出异常，提供没有权限
修改upload视图函数
@app.route('/upload',methods=['GET','POST'])
def upload():
if request.method == 'POST':
f = request.files['file']
base_path = os.path.abspath(os.path.dirname(__file__))
upload_path = os.path.join(base_path,'static\uploads',secure_filename(f.filename))
f.save(upload_path)
return "文件上传成功!!"
return render_template('upload.html')再次进行文件上传，选中文件后，点击上传按钮，可以看到
由此可以看出，文件已经成功上传，此时查看项目static/uploads目录，可以看到上传的图片已经保存在flask项目中了
由此可以在Flask项目中完成文件上传功能!!
