wordpress多站点模式插件什么是信息流广告
项目结构
技术选型
flask 做后端, 提供数据和渲染html
暂时没有提供mysql, 后续会更新操作mysql和样式美化的版本
起一个flask服务
flask是python的一个web框架, 下面演示如何提供http接口, 并返回json数据
main.py
# flask创建http接口
from flask import Flask, request, jsonify,render_template
# 支持flask跨域
from flask_cors import CORS
# 创建flask服务
app = Flask(__name__)
CORS(app, resources=r'/*') # 注册CORS, "/*" 允许访问域名所有api # 首页
@app.route('/',methods=['get'])
def index():# 自动在templates里找对应名称的文件return jsonify({"msg":"hello"})if __name__ == "__main__":# 运行web服务app.run(host='0.0.0.0', port=10086)此时打开终端, 运行
python main.py打开浏览器, 输入 http://localhost:10086/
渲染模板
flask可以渲染html文件(自动往项目根目录的templates里找), 并往里面填数据
main.py
# flask创建http接口
from flask import Flask, request, jsonify,render_template
# 支持flask跨域
from flask_cors import CORS
# 创建flask服务
app = Flask(__name__)
CORS(app, resources=r'/*') # 注册CORS, "/*" 允许访问域名所有api # 首页
@app.route('/',methods=['get'])
def index():# 自动在templates里找对应名称的文件return render_template('index.html',msg="hello world")if __name__ == "__main__":# 运行web服务app.run(host='0.0.0.0', port=10086)index.html
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head>
<body>{{msg}}
</body>
</html>浏览器
用对象数组来存放图书数据
main.py
通过模板渲染传递books到html里
# flask创建http接口
from flask import Flask, request, jsonify,render_template
# 支持flask跨域
from flask_cors import CORS
# 创建flask服务
app = Flask(__name__)
CORS(app, resources=r'/*') # 注册CORS, "/*" 允许访问域名所有api # 暂时代替数据库
books = [{"id":'1',"name":"hello world","author":"迭名","desc": "程序员入门第一本书","price": 11.99},{"id":'2',"name":"0基础学it","author":"xx程序员","desc": "某培训机构精心出品教程","price": 99.98},
]# 首页
@app.route('/',methods=['get'])
def index():# 自动在templates里找对应名称的文件return render_template('index.html',books=books)if __name__ == "__main__":# 运行web服务app.run(host='0.0.0.0', port=10086)index.html
html接收flask后端传来的数据, 渲染到table里
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head>
<!-- 加样式,居中 -->
<style>* {margin: 0 auto;}
</style><body><br><table border="1"><thead><tr><th>书名</th><th>作者</th><th>描述</th><th>价格</th><th>操作</th></tr></thead><tbody>{% for book in books %} {# 遍历 books 变量 #}<tr id={{book.id}}><th>{{book.name}}</th><th>{{book.author}}</th><th>{{book.desc}}</th><th>{{book.price}}</th><th><button id={{book.id}}>删除</button><a href='http://localhost:10086/uptbook?id={{book.id}}'>修改</a></th></tr>{% endfor %} {# 使用 endfor 标签结束 for 语句 #}</tbody></table><br>
</body></html>查看效果
添加图书
使用a标签请求flask后端, flask后端返回html模板, 实现跳转添加页面(add.html)
这里add.html是在book下, 这是因为如果还有别的服务(比如用户的crud), 可以通过不同文件夹区分模块
添加两个接口, 我们的id就用book对象在books数组里的下标(索引/序号), 添加就直接append添加到books数组的末尾
# 跳转添加页面
@app.route('/addbook',methods=['get'])
def addbook_html():# 自动在templates里找对应名称的文件return render_template('book/add.html')# 添加
@app.route('/addbook',methods=['post'])
def addbook(): # 获取json数据book = request.get_json() book['id']= str(len(book)-1) books.append(book)return jsonify({"books":books})main.py
# flask创建http接口
from flask import Flask, request, jsonify,render_template
# 支持flask跨域
from flask_cors import CORS
# 创建flask服务
app = Flask(__name__)
CORS(app, resources=r'/*') # 注册CORS, "/*" 允许访问域名所有api # 暂时代替数据库
books = [{"id":'1',"name":"hello world","author":"迭名","desc": "程序员入门第一本书","price": 11.99},{"id":'2',"name":"0基础学it","author":"xx程序员","desc": "某培训机构精心出品教程","price": 99.98},
]# 首页
@app.route('/',methods=['get'])
def index():# 自动在templates里找对应名称的文件return render_template('index.html',books=books)# 跳转添加页面
@app.route('/addbook',methods=['get'])
def addbook_html():# 自动在templates里找对应名称的文件return render_template('book/add.html')# 添加
@app.route('/addbook',methods=['post'])
def addbook(): # 获取json数据book = request.get_json() # 用数组下标表示idbook['id']= str(len(book)-1) # 添加到books末尾books.append(book)return jsonify({"books":books})if __name__ == "__main__":# 运行web服务app.run(host='0.0.0.0', port=10086)index.html
我们使用axios(js的一个库)来发送http请求
<!-- 引入axios发送请求给后端 -->
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>发送请求前, 通过input框的value获取数据, 然后axios发送post请求, 并传递一个json对象给后端
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head><body><form id="form"><lable>书名</lable><input type="text" name="book-name" id="book-name"><label>作者</label><input type="text" name="book-author" id="book-author"><label>描述</label><input type="text" name="book-desc" id="book-desc"><label>价格</label><input type="text" name="book-price" id="book-price"><button type="submit">提交</button></form><!-- 引入axios发送请求给后端 --><script src="https://unpkg.com/axios/dist/axios.min.js"></script><script>const addform = document.querySelector("#form")const bookName = document.querySelector("#book-name")const bookDesc = document.querySelector("#book-desc")const bookAuthor = document.querySelector("#book-author")const bookPrice = document.querySelector("#book-price")addform.addEventListener("submit", function (e) {e.preventDefault();// console.log(bookName.value);// 发送请求给后端axios.post('http://localhost:10086/addbook',// 传递json数据给后端{name: bookName.value,author: bookAuthor.value,desc: bookDesc.value,price: bookPrice.value})// axios请求完成后.then((res) => {// 后端处理完请求,axios拿到的结果console.log(res);alert('添加成功')// 跳转首页window.location.href = 'http://localhost:10086/'})})</script>
</body></html>查看效果
删除图书
我们通过axios发送delete请求给后端, 同时传递id, 后端遍历books, 找到对应id的元素下标, 然后删除
main.py
# flask创建http接口
from flask import Flask, request, jsonify,render_template
# 支持flask跨域
from flask_cors import CORS
# 创建flask服务
app = Flask(__name__)
CORS(app, resources=r'/*') # 注册CORS, "/*" 允许访问域名所有api # 暂时代替数据库
books = [{"id":'1',"name":"hello world","author":"迭名","desc": "程序员入门第一本书","price": 11.99},{"id":'2',"name":"0基础学it","author":"xx程序员","desc": "某培训机构精心出品教程","price": 99.98},
]# 首页
@app.route('/',methods=['get'])
def index():# 自动在templates里找对应名称的文件return render_template('index.html',books=books)# 跳转添加页面
@app.route('/addbook',methods=['get'])
def addbook_html():# 自动在templates里找对应名称的文件return render_template('book/add.html')# 添加
@app.route('/addbook',methods=['post'])
def addbook(): # 获取json数据book = request.get_json() # 用数组下标表示idbook['id']= str(len(book)-1) # 添加到books末尾books.append(book)return jsonify({"books":books})# 删除
@app.route('/delete',methods=['delete'])
def delbook():id = request.args.get('id')# 下标index = -1# 遍历,找到id相同的元素for i in range(len(books)):if books[i]['id'] == id:# 记录元素下标index = i# id不是-1表示有找到要删除的元素if i != -1:# 删除books.remove(books[index])return jsonify({'books': books})else:return jsonify({'books': books})if __name__ == "__main__":# 运行web服务app.run(host='0.0.0.0', port=10086)index.html
我们在渲染table的时候, 将每行(tr标签)的id设为book的id, 删除时, 可以通过tr的id获取要删除的book的id, 实现删除特定的book
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head>
<!-- 加样式,居中 -->
<style>* {margin: 0 auto;text-align: center;}
</style><body><br><table border="1"><thead><tr><th>书名</th><th>作者</th><th>描述</th><th>价格</th><th>操作</th></tr></thead><tbody>{% for book in books %} {# 遍历 books 变量 #}<tr id={{book.id}}><th>{{book.name}}</th><th>{{book.author}}</th><th>{{book.desc}}</th><th>{{book.price}}</th><th><button id={{book.id}}>删除</button><a href='http://localhost:10086/uptbook?id={{book.id}}'>修改</a></th></tr>{% endfor %} {# 使用 endfor 标签结束 for 语句 #}</tbody></table><br><a href="http://localhost:10086/addbook">添加图书</a><!-- axios,可以发送请求给后端 --><script src="https://unpkg.com/axios/dist/axios.min.js"></script><script>// 按钮const btns = document.querySelectorAll('th > button')// 遍历btns.forEach((b) => {console.log(b.id);// 给按钮添加click事件b.addEventListener('click', function (e) {// todo 弹出确认框,是否删除// 删除axios.delete(("http://localhost:10086/delete?id=" + b.id)).then((res) => {if (res.status == 200 && res.data) {// 刷新页面location.reload();alert('删除成功')} else {alert('删除失败')}})})})</script>
</body></html>查看效果
修改图书信息
前端点击修改后跳转修改页面
<a href='http://localhost:10086/uptbook?id={{book.id}}'>修改</a>main.py
# flask创建http接口
from flask import Flask, request, jsonify,render_template
# 支持flask跨域
from flask_cors import CORS
# 创建flask服务
app = Flask(__name__)
CORS(app, resources=r'/*') # 注册CORS, "/*" 允许访问域名所有api # 暂时代替数据库
books = [{"id":'1',"name":"hello world","author":"迭名","desc": "程序员入门第一本书","price": 11.99},{"id":'2',"name":"0基础学it","author":"xx程序员","desc": "某培训机构精心出品教程","price": 99.98},
]# 首页
@app.route('/',methods=['get'])
def index():# 自动在templates里找对应名称的文件return render_template('index.html',books=books)# 跳转添加页面
@app.route('/addbook',methods=['get'])
def addbook_html():# 自动在templates里找对应名称的文件return render_template('book/add.html')# 添加
@app.route('/addbook',methods=['post'])
def addbook(): # 获取json数据book = request.get_json() # 用数组下标表示idbook['id']= str(len(book)-1) # 添加到books末尾books.append(book)return jsonify({"books":books})# 删除
@app.route('/delete',methods=['delete'])
def delbook():id = request.args.get('id')# 下标index = -1# 遍历,找到id相同的元素for i in range(len(books)):if books[i]['id'] == id:# 记录元素下标index = i# id不是-1表示有找到要删除的元素if i != -1:# 删除books.remove(books[index])return jsonify({'books': books})else:return jsonify({'books': books})# 跳转修改页面
@app.route('/uptbook',methods=['get'])
def uptbook_html():id = request.args.get('id') book = {}for b in books: if b['id'] == id:book = breturn render_template('book/update.html',book=book)# 修改
@app.route('/uptbook',methods=['patch'])
def uptbook():id = request.args.get('id') book = request.get_json() index = -1for i in range(len(books)): if books[i]['id'] == id:index = iif index == -1:return jsonify({"books":books})else: if(book['name']!=None):books[index]['name'] = book['name']if(book['author']!=None):books[index]['author'] = book['author']if(book['desc']!=None):books[index]['desc'] = book['desc']if(book['price']!=None):books[index]['price'] = book['price']return jsonify({"books":books}) if __name__ == "__main__":# 运行web服务app.run(host='0.0.0.0', port=10086)update.html
和添加图书页面基本相同
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head><body><!-- 自定义属性,值为book.id --><form id="form" data-id={{book.id}}><lable>书名</lable><input type="text" name="book-name" value={{book.name}} id="book-name"><label for="">作者</label><input type="text" name="book-author" value={{book.author}} id="book-author"><label for="">描述</label><input type="text" name="book-desc" value={{book.desc}} id="book-desc"><label for="">价格</label><input type="text" name="book-price" value={{book.price}} id="book-price"><button type="submit">提交</button></form><script src="https://unpkg.com/axios/dist/axios.min.js"></script><script>const uptform = document.querySelector("#form")const bookName = document.querySelector("#book-name")const bookDesc = document.querySelector("#book-desc")const bookAuthor = document.querySelector("#book-author")const bookPrice = document.querySelector("#book-price")// 自定义属性 const id = uptform.dataset.iduptform.addEventListener("submit", function (e) {e.preventDefault();// console.log(bookName.value);// 发送请求给后端axios.patch(("http://localhost:10086/uptbook?id=" + id), {name: bookName.value,author: bookAuthor.value,desc: bookDesc.value,price: bookPrice.value}).then((res) => {console.log(res);alert('修改成功')// 跳转回首页window.location.href = 'http://localhost:10086/'})})</script>
</body></html>查看效果
完结, 恭喜