WSGI 网页制作01

最新推荐文章于 2023-07-25 12:01:56 发布

原创最新推荐文章于 2023-07-25 12:01:56 发布 · 289 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#WSGI #动态网页

网络编程同时被 2 个专栏收录

6 篇文章

订阅专栏

python框架

5 篇文章

订阅专栏

本文介绍了一种使用Python实现的WSGI服务器，详细讲解了如何处理HTTP请求、解析请求头和响应过程。通过多进程处理客户端连接，展示了动态内容生成和静态文件服务的结合。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

# coding:utf-8

from socket import *
from multiprocessing import Process

import re
import os
import sys
#文件路径
ROOT_DIR = "./html"
WSGI__DIR = "./WSGI"

class Httpserver(object):
    def __init__(self):
        self.server_socket = socket(AF_INET, SOCK_STREAM)
        self.server_socket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)

    def bind(self,port):
        self.server_socket.bind(('', port))

    def start(self):
        self.server_socket.listen(128)
        while True:
            client_socket, client_ip_port_tuple = self.server_socket.accept()
            print ('[%s-%s客户端连接]' % (client_ip_port_tuple))
            p = Process(target=self.fun, args=(client_socket,))
            p.start()
            client_socket.close()

    def start_response(self, status_code, headers):
        '''     status_code = '200 OK'
                headers =[('Content-Type','text/plain')]
                start_response(status_code,headers)
        '''
        for header in headers:
            response_header = 'HTTP/1.1 ' + status_code + '\r\n' + '%s: %s\r\n'%header
        self.response_header = response_header

    def fun(self,client_socket):
        recv_data = client_socket.recv(1024)
        recv_data_line_list = recv_data.splitlines()
        response_start_line = recv_data_line_list[0].decode('utf-8')
        for xx in recv_data_line_list:
            print (xx.decode('utf-8'))
        print ('*' * 60)
        print (response_start_line)
        response_header = 'Server: My Server\r\n'
        # GET /index.html HTTP/1.1
        file_name = re.match(r'\w+ +(/[^ ]*) \w+/\d+\.\d+', response_start_line).group(1)
        method = re.match(r'(\w+) +/[^ ]* \w+/\d+\.\d+', response_start_line).group(1)
        # 例：/ctime.py
        if file_name.endswith('.py'):
            try:
                #导入的是不带后缀文件名
                m = __import__(file_name[1:-3])
            except Exception:
                self.response_header = "HTTP/1.1 404 Not Found\r\n"
                response_body = "not found"
            else:
                env = {
                    "PATH_INFO": file_name,
                    "METHOD": method
                }
                response_body = m.application(env, self.start_response)
            response = self.response_header +'\r\n' + response_body

        else :
            if file_name == '/':
                file_name = '/index.html'
            try:
                # 打开文件读取文件内容
                with open(ROOT_DIR + file_name, 'rb') as f:
                    data = f.read().decode('utf-8')
            except IOError:
                response_start_line = 'HTTP/1.1 404 File not found\r\n'
                response_header = 'Server: My Server\r\n'
                response_body = 'File is not exist !'
            else:
                response_start_line = 'HTTP/1.1 200 OK\r\n'
                response_header = 'Server: My Server\r\n'
                response_body = data
            response = response_start_line + response_header + '\r\n' + response_body


        print ('*' * 60)
        print (response)
        print ('*' * 60)

        client_socket.send(response.encode('utf-8'))
        client_socket.close()




def main():
    sys.path.insert(1, WSGI__DIR)
    http_server = Httpserver()
    http_server.bind(8000)
    http_server.start()


if __name__ == '__main__':
    main()

ctime.py

import time

def application(env, start_response):
    status_code = '200 OK'
    headers =[
        ('Content-Type','text/plain')
    ]
    start_response(status_code,headers)

    return time.ctime()

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>test</title>
</head>
<body>
    <h1>Python</h1>
    <p>第一次测试，由于regex的错误找了几小时的错误！</p>
</body>
</html>

运行结果：
在这里插入图片描述

总结：

1.start_response 定义在主程序中定义，却在脚本中调用。返回起始行和响应头
要强调的是

 def start_response(self, status_code, headers):
            '''    
             status_code = '200 OK'
             headers =[('Content-Type','text/plain')]
             start_response(status_code,headers)
            '''
            for header in headers:
                response_header = 'HTTP/1.1 ' + status_code + '\r\n' + '%s: %s\r\n'%header
            self.response_header = response_header

2.application 在脚本中定义接收两个参数 变量env 和 函数名start_response，却在主程序中调用。并返回response_body
3.start_response的调用是写在application函数体中的~

def application(env, start_response):
    status_code = '200 OK'
    headers =[
        ('Content-Type','text/plain')
    ]
    start_response(status_code,headers)

    return time.ctime()

执行顺序就是：先执行application 然后在 application 中又执行了 start_response