60、django入门1

1、web的祖宗

"""
先启动服务，监听
    while 1:
        等待连接...

        3. 接收到你的请求
        4. 根据你的需求，返回相应的内容
        断开
"""

import socket
sk = socket.socket()
sk.bind(("127.0.0.1", 8080))  # 绑定IP和端口
sk.listen()  # 监听


while 1:
    # 等待连接
    conn, add = sk.accept()
    data = conn.recv(8096)  # 接收客户端发来的消息
    print(data)
    print("=" * 120)
    conn.send(b'HTTP/1.1 200 OK\r\n\r\n')  # 因为要遵循HTTP协议 
    conn.send(b'O98K')
    conn.close()

2、根据url的路径跳转不同的页面

"""
根据URL中不同的路径返回不同的内容
"""
import socket
sk = socket.socket()
sk.bind(("127.0.0.1", 8080))  # 绑定IP和端口
sk.listen()  # 监听


while 1:
    # 等待连接
    conn, add = sk.accept()
    data = conn.recv(8096)  # 接收客户端发来的消息
    # print(data)   #打印接收到内容
    # 从data中取到路径
    data = str(data, encoding="utf8")  # 把收到的字节类型的数据转换成字符串
    # print(data)
    # 按\r\n分割
    data1 = data.split("\r\n")[0]
    # print(data1)
    url = data1.split()[1]   #切割出url
    print("url:", url)
    print("*" * 120)

    conn.send(b'HTTP/1.1 200 OK\r\n\r\n')  # 因为要遵循HTTP协议
    # 根据不同的路径返回不同内容
    if url == "/index/":
        response = b"index"
    elif url == "/home/":
        response = b"home"
    else:
        response = b"404 not found!"

    conn.send(response)
    conn.close()

3、根据url，把要返回的内容（也就是发送回客户端的内容）写成函数，根据url的不同，执行不同的函数

"""
根据URL中不同的路径返回不同的内容
"""

import socket
sk = socket.socket()
sk.bind(("127.0.0.1", 8080))  # 绑定IP和端口
sk.listen()  # 监听


# 将返回不同的内容部分封装成函数
def index(url):
    s = "这是{}页面！".format(url)
    return bytes(s, encoding="utf8")


def home(url):
    s = "这是{}页面！".format(url)
    return bytes(s, encoding="utf8")


while 1:
    # 等待连接
    conn, add = sk.accept()
    data = conn.recv(8096)  # 接收客户端发来的消息
    # 从data中取到路径
    data = str(data, encoding="utf8")  # 把收到的字节类型的数据转换成字符串
    # 按\r\n分割
    data1 = data.split("\r\n")[0]
    url = data1.split()[1]
    print("url:", url)
    print("*" * 120)

    conn.send(b'HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\n\r\n')  # 因为要遵循HTTP协议
    # 根据不同的路径返回不同内容
    if url == "/index/":
        response = index(url)
    elif url == "/home/":
        response = home(url)
    else:
        response = b"404 not found!"

    # 具体的响应体
    conn.send(response)
    conn.close()

 4、把所有要执行的函数放到列表中，根据url路径，对列表进行循环，查找到对应的url路径，然后执行元祖中的对应的函数。

"""
根据URL中不同的路径返回不同的内容
函数进阶版
"""

import socket
sk = socket.socket()
sk.bind(("127.0.0.1", 8080))  # 绑定IP和端口
sk.listen()  # 监听


# 将返回不同的内容部分封装成函数
def index(url):
    s = "这是{}页面！".format(url)
    return bytes(s, encoding="utf8")


def home(url):
    s = "这是{}页面！".format(url)
    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 = [
    ("/index/", index),
    ("/home/", home),
]

while 1:
    # 等待连接
    conn, add = sk.accept()
    data = conn.recv(8096)  # 接收客户端发来的消息
    # 从data中取到路径
    data = str(data, encoding="utf8")  # 把收到的字节类型的数据转换成字符串
    # 按\r\n分割
    data1 = data.split("\r\n")[0]
    url = data1.split()[1]
    print("url:", url)
    print("*" * 120)

    conn.send(b'HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\n\r\n')  # 因为要遵循HTTP协议
    # 根据不同的路径返回不同内容
    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!"

    # 具体的响应体
    conn.send(response)
    conn.close()

5、根据url中不同的路径返回不同的内容，把每个函数中要返回的内容变成文档，对文档进行读取然后返回。

"""
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
"""

import socket
sk = socket.socket()
sk.bind(("127.0.0.1", 8080))  # 绑定IP和端口
sk.listen()  # 监听


# 将返回不同的内容部分封装成函数
def index(url):
    with open("index.html", "r", encoding="utf8") as f:
        s = f.read()
    return bytes(s, encoding="utf8")


def home(url):
    with open("home.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 = [
    ("/index/", index),
    ("/home/", home),
]

while 1:
    # 等待连接
    conn, add = sk.accept()
    data = conn.recv(8096)  # 接收客户端发来的消息
    # 从data中取到路径
    data = str(data, encoding="utf8")  # 把收到的字节类型的数据转换成字符串
    # 按\r\n分割
    data1 = data.split("\r\n")[0]
    url = data1.split()[1]
    print("url:", url)
    print("*" * 120)

    conn.send(b'HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\n\r\n')  # 因为要遵循HTTP协议
    # 根据不同的路径返回不同内容
    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!"

    # 具体的响应体
    conn.send(response)
    conn.close()

6、要读取的文档的某些内容被替换，变成动态的

"""
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
动态起来
"""

import socket
import time

sk = socket.socket()
sk.bind(("127.0.0.1", 8080))  # 绑定IP和端口
sk.listen()  # 监听


# 将返回不同的内容部分封装成函数
def index(url):
    with open("index.html", "r", encoding="utf8") as f:
        s = f.read()
        now = str(time.time())
        s = s.replace("@@oo@@", now)  #替换内容
    return bytes(s, encoding="utf8")


def home(url):
    with open("home.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 = [
    ("/index/", index),
    ("/home/", home),
]

while 1:
    # 等待连接
    conn, add = sk.accept()
    data = conn.recv(8096)  # 接收客户端发来的消息
    # 从data中取到路径
    data = str(data, encoding="utf8")  # 把收到的字节类型的数据转换成字符串
    # 按\r\n分割
    data1 = data.split("\r\n")[0]
    url = data1.split()[1]
    print("url:", url)
    print("*" * 120)

    conn.send(b'HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\n\r\n')  # 因为要遵循HTTP协议
    # 根据不同的路径返回不同内容
    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!"

    # 具体的响应体
    conn.send(response)
    conn.close()

7、把响应的内容简化成python中已经封装好的模块（wsgiref模块），直接使用

"""
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
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 index(url):
    with open("index.html", "r", encoding="utf8") as f:
        s = f.read()
        now = str(time.time())
        s = s.replace("@@oo@@", now)
    return bytes(s, encoding="utf8")


def home(url):
    with open("home.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 = [
    ("/index/", index),
    ("/home/", home),
]


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', 8090, run_server)
    print("Serving HTTP on port 8090...")
    httpd.serve_forever()

8、python中的模块替换

"""
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
动态起来
wsgiref模块版和jinja2模块
"""

import time
from wsgiref.simple_server import make_server
import jinja2


# 将返回不同的内容部分封装成函数
def index(url):
    with open("index.html", "r", encoding="utf8") as f:
        s = f.read()
        now = str(time.time())
        s = s.replace("@@oo@@", now)
    return bytes(s, encoding="utf8")


def home(url):
    with open("home.html", "r", encoding="utf8") as f:
        s = f.read()
    return bytes(s, encoding="utf8")


def xiaoqiang(url):
    with open("xiaoqiang.html", "r", encoding="utf8") as f:
        s = f.read()
        template = jinja2.Template(s)  # 生成一个jinja2的Template（模板）对象
        data = {"name": "小强", "hobby_list": ["对子哈特", "姑娘", "大汉"]}
        response = template.render(data)  # 本质上是完成了字符串的替换
    return bytes(response, encoding="utf8")




# 定义一个url和实际要执行的函数的对应关系
list1 = [
    ("/index/", index),
    ("/home/", home),
    ("/xiaoqiang/", xiaoqiang),
]


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', 8090, run_server)
    print("Serving HTTP on port 8090...")
    httpd.serve_forever()

9、从数据库中返回内容

"""
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
动态起来
wsgiref模块版和jinja2模块和pymysql
"""
import time
from wsgiref.simple_server import make_server
import jinja2
import pymysql

# 将返回不同的内容部分封装成函数
def index(url):
    with open("index.html", "r", encoding="utf8") as f:
        s = f.read()
        now = str(time.time())
        s = s.replace("@@oo@@", now)
    return bytes(s, encoding="utf8")


def home(url):
    with open("home.html", "r", encoding="utf8") as f:
        s = f.read()
    return bytes(s, encoding="utf8")


def xiaoqiang(url):
    with open("xiaoqiang.html", "r", encoding="utf8") as f:
        s = f.read()
        template = jinja2.Template(s)  # 生成一个jinja2的Template（模板）对象
        # data = {"name": "小强", "hobby_list": ["对子哈特", "姑娘", "大汉"]}

        conn = pymysql.connect(host="127.0.0.1", port=3306, user="root", passwd="123456", db="userinfo", charset="utf8")
        cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
        cursor.execute("SELECT name, hobby FROM user")
        user = cursor.fetchone()
        cursor.close()
        conn.close()
        print("user:", user)
        print("*" * 120)

        hobby_list = user["hobby"].split()
        user["hobby_list"] = hobby_list
        print(user)
        print("-" * 120)
        response = template.render(user)  # 本质上是完成了字符串的替换
    return bytes(response, encoding="utf8")




# 定义一个url和实际要执行的函数的对应关系
list1 = [
    ("/index/", index),
    ("/home/", home),
    ("/xiaoqiang/", xiaoqiang),
]


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', 8090, run_server)
    print("Serving HTTP on port 8090...")
    httpd.serve_forever()