只是一名搬运工：copy LOU707758882 “Python Flask Web框架”实验报告接受请求数据这一章的课程有点含糊，表达得不是那么的清晰，知识点也没有明确。那么其实本章主要在上一章的基础上增加了对post数据请求的处理以及文件上传的处理接收并处理请求数据在templates文件夹中创建名为login.html的文件，用来提交post数据，代码如下： Login Page {% if error %}

Hello {{ error }}!

{% else %}

welcome!

{% endif %} 在python文件中创建响应代码 from flask import Flask from flask import request from flask import render_template app = Flask (__name__) @app.route('/login', methods=['POST', 'GET']) def login(): error = None if request.method == 'POST': if request.form['username'] == "test" and request.form['password'] == "test123": return render_template('hello.html', name=request.form['username']) else: error = 'Invalid username/password' return render_template('login.html', error=error) 上传文件服务依旧在templates中创建upload.html文件，代码如下： Upload new File

Upload new File

{% if filename %}

file {{ filename }} is upload success

{% elif error %}

{% else %}

welcome!

{% endif %} 在python文件中创建响应代码 import os from werkzeug.utils import secure_filename UPLOAD_FOLDER = './' ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif']) app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER @app.route('/upload',methods=['POST','GET']) def upload_file(): if request.method == 'POST': file = request.files['the_file'] if file and allowed_file(file.filename): filename = secure_filename(file.filename) file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename)) return render_template('upload.html',filename=file.filename) else: return render_template('upload.html',error="file:\""+file.filename+"\" is not in "+_filter(str(list(ALLOWED_EXTENSIONS)))) else: err = 'upload is error' return render_template('upload.html',error="Welcome") def allowed_file(filename): "判断上传文件格式并返回判断结果(True/False)" return '.' in filename and filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS def _filter(str): "过滤集合中的指定字符" dirty_stuff = ["'", "[","]"] for stuff in dirty_stuff: str = str.replace(stuff, "") return str 为了达到更好的效果，我们修改了hello.html文件的代码 Hello from Flask {% if name %}

Hello {{ name }}!

upload new file

{% else %}

Hello World!

{% endif %} 效果如下文件上传： ![实验楼](https://dn-simplecloud.shiyanlou.com/3201941522746833170-wm) upload.html: ![实验楼](https://dn-simplecloud.shiyanlou.com/3201941522746888920-wm) upload.py: ![实验楼](https://dn-simplecloud.shiyanlou.com/3201941522746935383-wm)![实验楼](https://dn-simplecloud.shiyanlou.com/3201941522746954632-wm) 上传文件的方法可以参考官方的说明