服务端(自己实现django)
'''
django简化版:socket服务端
a.收发浏览器信息----wsgiref.py
b.根据用户访问的不同路径执行不同函数
c.从html读取出内容,并完成字符串的替换(动态网页)
按照功能划分web框架
1.框架自带a,b,c------tornado框架
2.框架自带b,c,使用第三方的a-------django框架
3.框架自带b,使用第三方a和c--------flask
按照维度划分
1.django----大而全,网站能用的都有
2.其他------fLask轻量级
'''
import socket
# 生成socket实例对象
sk = socket.socket()
# 绑定ip和端口
sk.bind(("127.0.0.1", 8000))
# 监听
sk.listen()
# 处理xiaohei的函数
def xiaohei(url):
with open("xiaohei.html",'r',encoding='utf-8') as f:
ret = f.read()
import time
# 动态网页本质都是字符串的替换--发生在服务端
ret = ret.replace("@@&&@@",str(time.ctime()))
return bytes(ret,encoding='utf-8')
# ret = "<h1>hello {} xiaohei<h1>".format(url)
# return bytes(ret,encoding='utf-8')
def xiaobai(url):
with open("xiaobai.html",'rb') as f:
ret = f.read()
return ret
# ret = "<h2>hello {} xiaobai<h2>".format(url)
# return bytes(ret,encoding='utf-8')
def f404(url):
ret = "找不到{}这个url".format(url)
return bytes(ret,encoding='utf-8')
# urls.py
url_func = [
("/xiaohei/",xiaohei),
("/xiaobai/",xiaobai),
]
# 一直等待链接
while 1:
# 获取客户端的链接和地址
conn, addr = sk.accept()
# 没有用的变量通常用下划线表示
# conn,_ = sk.accept()
# 接收消息
data = conn.recv(8989)
# 把收到的数据转成字符串类型
data_str = str(data, encoding="utf-8") # bytes("str", enconding="utf-8")
print(data_str)
# 用\r\n去切割上面的字符串-----切割出路径
l1 = data_str.split("\r\n")
# 按照空格切割上面的字符串-----切割出url
l2 = l1[0].split()
url = l2[1]
print(url)
# 回复消息消息必须包含四部分:即响应格式(协议版本,状态码,状态描述,回车符)
conn.send(b'http/1.1 200 OK\r\ncontent-type:text/html;charset=utf-8\r\n\r\n')
# 空行后面接响应正文,想让浏览器在页面上显示出来的内容都是响应正文
# 根据不同url返回不同内容
# if url == '/xiaohei/':
# response = xiaohei(url)
# else:
# response=b"404 not found"
# conn.send(b'<h1>hello world<h1>')
# conn.send(response)
for i in url_func:
if i[0] == url:
func = i[1]
break
else:
func = f404
response = func(url)
conn.send(response)
# 关闭
conn.close()
sk.close()
Django的wsgiref模块
"""
根据URL中不同的路径返回不同的内容--函数进阶版
返回HTML页面
让网页动态起来
wsgiref模块版
"""
import time
from wsgiref.simple_server import make_server
# 将返回不同的内容部分封装成函数
def xiaohei(url):
with open("xiaohei.html", "r", encoding="utf8") as f:
s = f.read()
now = str(time.time())
s = s.replace("@@&&@@", now)
return bytes(s, encoding="utf8")
def xiaobai(url):
with open("xiaobai.html", "r", encoding="utf8") as f:
s = f.read()
return bytes(s, encoding="utf8")
# 定义一个url和实际要执行的函数的对应关系
list1 = [
("/xiaohei/", xiaohei),
("/xiaobai/", xiaobai),
]
def run_server(environ, start_response):
start_response('200 OK', [('Content-Type', 'text/html;charset=utf8'), ]) # 设置HTTP响应的状态码和头信息
url = environ['PATH_INFO'] # 取到用户输入的url
func = None
for i in list1:
if i[0] == url:
func = i[1]
break
if func:
response = func(url)
else:
response = b"404 not found!"
return [response, ]
if __name__ == '__main__':
httpd = make_server('127.0.0.1', 8080, run_server)
print("我在8080等你哦...")
httpd.serve_forever()
xiaohei.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>xiaohei</title>
</head>
<body>
<h1>返回html文件</h1>
<p>随便写几句</p>
<p>随便写几句</p>
<p>随便写几句</p>
<a href="https://www.douyu.com/directory/all"><h1>斗鱼</h1></a>
<p>@@&&@@</p>
</body>
</html>
xiaohei.html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>xiaobai</title>
</head>
<body>
<h1>用来测试的第二个页面</h1>
<h1>用来测试的第二个页面</h1>
<h1>用来测试的第二个页面</h1>
<h1>用来测试的第二个页面</h1>
</body>
</html>
转载于:https://www.cnblogs.com/shuimohei/p/10704202.html