HTTP协议介绍HTTP协议对收发消息的格式要求每个HTTP请求和响应都遵循相同的格式，一个HTTP包含Header和Body两部分，其中Body是可选的。HTTP响应的Header中有一个 Content-Type表明响应的内容格式。它的值如text/html; charset=utf-8。text/html则表示是网页，charset=utf-8则表示编码为utf-8。

socket 服务端 基础版
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import socketsk = socket.socket()
sk.bind(('127.0.0.1',8002))
sk.listen()while True:conn,addr = sk.accept()data = conn.recv(8096)print(data)conn.send(b'HTTP/1.1 200 ok\r\nk1: v1\r\n\r\n')conn.send(b'<h1>ok!</h1>')conn.close()----------------------------------根据不同路径返回不同内容

while True:    conn,addr = sk.accept()    data = conn.recv(8096)    data = data.decode()    url = data.split()[1]    conn.send(b'HTTP/1.1 200 ok\r\nk1: v1\r\n\r\n')    if url == '/sx':        conn.send(b'11')    elif url == '/bj':        conn.send(b'22')    else:        conn.send(b'not found!')    conn.close()-------------------------------------def 函数版---

import socketsk = socket.socket()sk.bind(('127.0.0.1',8002))sk.listen()def sx(url):    ret = 'nihao   -  {}'.format(url)    return ret.encode()def bj(url):    ret = 'huairen   -  {}'.format(url)    return ret.encode()while True:    conn,addr = sk.accept()    data = conn.recv(8096)    data = data.decode()    url = data.split()[1]    conn.send(b'HTTP/1.1 200 ok\r\nk1: v1\r\n\r\n')    if url == '/sx':        ret = sx(url)    elif url == '/bj':        ret = bj(url)    else:        ret = b'not found'    conn.send(ret)    conn.close()-----------------------------------进阶列表版

import socketsk = socket.socket()sk.bind(('127.0.0.1',8002))sk.listen()def sx(url):    ret = 'nihao   -  {}'.format(url)    return ret.encode()def bj(url):    ret = 'huairen   -  {}'.format(url)    return ret.encode()# 定义一个地址和函数的对应关系的列表list1 = [('/sx',sx),('/bj',bj)]while True:    conn,addr = sk.accept()    data = conn.recv(8096) # 接收数据    data = data.decode()    url = data.split()[1]  # 获取url    conn.send(b'HTTP/1.1 200 ok\r\nk1: v1\r\n\r\n')    func = None    for i in list1:        if url == i[0]:            func = i[1]            break    if func:        ret = func(url)    else:        ret = b'not found'      conn.send(ret)    conn.close()----返回html网页------------------

def index(url):    with open('index.html', 'rb') as f:        ret = f.read()        return ret

list1 = [('/sx',sx),('/index',index)]--------返回一个动态页面------------

def timer(url):    now = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime())    with open('time.html','r',encoding='utf-8') as f:        data = f.read()        data = data.replace('@@time@@',now)        return data.encode('utf-8')list1 = [('/sx',sx),('/index',index),('/timer',timer)]

"""
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
"""
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from wsgiref.simple_server import make_serverdef index(url):with open('index.html','r',encoding='utf-8') as f:s = f.read()return bytes(s,encoding='utf-8')def timer(url):import timewith open('time.html','r',encoding='utf-8') as f:s = f.read()s = s.replace('@@time@@',time.strftime("%Y-%m-%d %H:%M:%S"))return bytes(s,encoding='utf-8')list1 = [('/index/',index),('/time/',timer)]def run_server(environ,start_response):#设置http 响应的状态码和头信息start_response('200 OK',[('Content-Type', 'text/html;charset=utf8'),])url = environ['PATH_INFO'] #取到用户输入的urlfunc = Nonefor i in list1:if i[0] == url:func = i[1]breakif func:response = func(url)else:response = b'404 not found!'return [response,]
if __name__ == '__main__':httpd = make_server('127.0.0.1',8888,run_server)print('我在8888等你呦...')httpd.serve_forever()

------------引用第三方 jinja2----------from wsgiref.simple_server import make_server
from jinja2 import Template
def index(url):#读取html文件with open('index2.html','r',encoding='utf-8') as f:data = f.read()temp = Template(data)  #生成模板文件ret = temp.render({'name':'alex','hobby_list': ['抽烟', '喝酒', '烫头']})#把数据填充到模板中return bytes(ret,encoding='utf-8')def home(url):with open('home.html','r',encoding='utf-8') as f:s = f.read()return bytes(s,encoding='utf-8')
list1 = [('/index/',index),('/home/',home)]
def run_server(environ,start_response):#设置http 响应的状态码和头信息start_response('200 OK',[('Content-Type', 'text/html;charset=utf8'),])url = environ['PATH_INFO'] #取到用户输入的urlfunc = Nonefor i in list1:if i[0] == url:func = i[1]breakif func:response = func(url)else:response = b'404 not found!'return [response,]
if __name__ == '__main__':httpd = make_server('127.0.0.1',8888,run_server)print('我在8888等你呦...')httpd.serve_forever()