3 web服务器：静态文件

　　　　

1.处理客户端请求数据

>>> s = "GET / HTTP/1.1\r\nHost: 127.0.0.1:8080\r\nConnection: keep-alive"
>>> s.splitlines()
['GET / HTTP/1.1', 'Host: 127.0.0.1:8080', 'Connection: keep-alive']

#-*- coding:utf-8 -*-
import socket
                                 #空行
from multiprocessing import Process

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"   #常量全部要大写

                                #函数上面有空行2行
def hand_client(client_socket):
    """处理客户端请求"""       #推荐""""""
    # 获取客户端请求数据
    request_data = client_socket.recv(1024)
    print("request_data:",request_data)

    request_data = request_data.decode("utf-8")
    request_lines = request_data.splitlines()

    print(request_lines)
    for line in request_lines:
        print(line)

    # 构造响应数据    # 空一格在加注释
    response_start_line = "HTTP/1.1 200 OK \r\n"
    response_headers = "Server: My server\r\n"
    response_body = "hello world"
    response = response_start_line + response_headers + "\r\n" +response_body
    print("response:",response)

    # 向客户端返回相应数据
    client_socket.send(bytes(response,"utf-8"))

    # 关闭客户端连接
    client_socket.close()

if __name__ == "__main__":
                                 #AF_INET 是个常量
    server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server_socket.bind(("",8080))
    server_socket.listen(128)

    while True:
        client_socket, client_address = server_socket.accept()  #赋值的时候有空格
        print("[%s,%s]用户连接上了"%client_address)
        hand_client_process = Process(target=hand_client,args=(client_socket,))
                    #=函数名  不能有空格
        hand_client_process.start()
        client_socket.close()   #多进程会复制 client_socket

2.正则匹配

>>> s
'GET /favicon.ico HTTP/1.1'
>>> re.match(r"\w+ +(/[^ ]*)",s).group(1)
'/favicon.ico'

#-*- coding:utf-8 -*-
import socket
import re
                                 #空行
from multiprocessing import Process

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"   #常量全部要大写

                                #函数上面有空行2行
def hand_client(client_socket):
    """处理客户端请求"""       #推荐""""""
    # 获取客户端请求数据
    request_data = client_socket.recv(1024)
    print("request_data:",request_data)
    request_data = request_data.decode("utf-8")
    request_lines = request_data.splitlines()
    print(request_lines)

    # 解析请求报文
    for line in request_lines:
        print(line)
    # GET /favicon.ico HTTP/1.1
    request_start_line = request_lines[0]
    # 提取用户请求的文件名
    file_name = re.match(r"\w+ +(/[^ ]*)", request_start_line).group(1)
    print(file_name)

    # 构造响应数据    # 空一格在加注释
    response_start_line = "HTTP/1.1 200 OK \r\n"
    response_headers = "Server: My server\r\n"
    response_body = "hello world"
    response = response_start_line + response_headers + "\r\n" +response_body
    print("response:",response)

    # 向客户端返回相应数据
    client_socket.send(bytes(response,"utf-8"))

    # 关闭客户端连接
    client_socket.close()

if __name__ == "__main__":
                                 #AF_INET 是个常量
    server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server_socket.bind(("",8080))
    server_socket.listen(128)

    while True:
        client_socket, client_address = server_socket.accept()  #赋值的时候有空格
        print("[%s,%s]用户连接上了"%client_address)
        hand_client_process = Process(target=hand_client,args=(client_socket,))
                    #=函数名  不能有空格
        hand_client_process.start()
        client_socket.close()   #多进程会复制 client_socket

3. 打开文件读取内容，抛出异常

#-*- coding:utf-8 -*-
import socket
import re
                                 #空行
from multiprocessing import Process

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"   #常量全部要大写

                                #函数上面有空行2行
def hand_client(client_socket):
    """处理客户端请求"""       #推荐""""""
    # 获取客户端请求数据
    request_data = client_socket.recv(1024)
    print("request_data:",request_data)
    request_data = request_data.decode("utf-8")
    request_lines = request_data.splitlines()
    print(request_lines)

    # 解析请求报文
    for line in request_lines:
        print(line)
    # GET /favicon.ico HTTP/1.1
    request_start_line = request_lines[0]
    # 提取用户请求的文件名
    file_name = re.match(r"\w+ +(/[^ ]*)", request_start_line).group(1)
    print(file_name)

    # 打开文件读取内容
    file = open(HTML_ROOT_DIR + file_name,"rb")
    file_data = file.read()
    file.close()

    # 构造响应数据    # 空一格在加注释
    response_start_line = "HTTP/1.1 200 OK \r\n"
    response_headers = "Server: My server\r\n"
    response_body = file_data
    response = response_start_line + response_headers + "\r\n" + response_body
    print("response:",response)

    # 向客户端返回相应数据
    client_socket.send(bytes(response,"utf-8"))

    # 关闭客户端连接
    client_socket.close()

if __name__ == "__main__":
                                 #AF_INET 是个常量
    server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server_socket.bind(("",8080))
    server_socket.listen(128)

    while True:
        client_socket, client_address = server_socket.accept()  #赋值的时候有空格
        print("[%s,%s]用户连接上了"%client_address)
        hand_client_process = Process(target=hand_client,args=(client_socket,))
                    #=函数名  不能有空格
        hand_client_process.start()
        client_socket.close()   #多进程会复制 client_socket

4.抛出文件异常,修改字符编码

• 重用端口

server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         # 修改参数  #级别 socket   #重用地址   #1

#-*- coding:utf-8 -*-
import socket
import re
                                 #空行
from multiprocessing import Process

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"   #常量全部要大写

                                #函数上面有空行2行
def hand_client(client_socket):
    """处理客户端请求"""       #推荐""""""
    # 获取客户端请求数据
    request_data = client_socket.recv(1024)
    print("request_data:",request_data)
    request_data = request_data.decode("utf-8")
    request_lines = request_data.splitlines()
    print(request_lines)

    # 解析请求报文
    for line in request_lines:
        print(line)
    # GET /favicon.ico HTTP/1.1
    request_start_line = request_lines[0]
    # 提取用户请求的文件名
    file_name = re.match(r"\w+ +(/[^ ]*)", request_start_line).group(1)
    print(file_name)

    # 打开文件读取内容
    try :
        file = open(HTML_ROOT_DIR + file_name,"rb")
    except IOError:
        response_start_line = "HTTP/1.1 404 Not found \r\n"
        response_headers = "Server: My server\r\n"
        response_body = "the file is not found"
    else:
        file_data = file.read()
        file.close()

        # 构造响应数据    # 空一格在加注释
        response_start_line = "HTTP/1.1 200 OK \r\n"
        response_headers = "Server: My server\r\n"
        response_body = file_data.decode("utf-8")

    response = response_start_line + response_headers + "\r\n" + response_body
    print("response:",response)

    # 向客户端返回相应数据
    client_socket.send(bytes(response,"utf-8"))

    # 关闭客户端连接
    client_socket.close()

if __name__ == "__main__":
                                 #AF_INET 是个常量
    server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    server_socket.bind(("",8080))
    server_socket.listen(128)

    while True:
        client_socket, client_address = server_socket.accept()  #赋值的时候有空格
        print("[%s,%s]用户连接上了"%client_address)
        hand_client_process = Process(target=hand_client,args=(client_socket,))
                    #=函数名  不能有空格
        hand_client_process.start()
        client_socket.close()   #多进程会复制 client_socket

　　　　

5.主页优化

    if  "/" == file_name :  # 常量放在等号的左边
        file_name = "/index.html"

6.完整版

#-*- coding:utf-8 -*-
import socket
import re
                                 #空行
from multiprocessing import Process

# 设置静态文件根目录
HTML_ROOT_DIR = "./html"   #常量全部要大写

                                #函数上面有空行2行
def hand_client(client_socket):
    """处理客户端请求"""       #推荐""""""
    # 获取客户端请求数据
    request_data = client_socket.recv(1024)
    print("request_data:",request_data)
    request_data = request_data.decode("utf-8")
    request_lines = request_data.splitlines()
    print(request_lines)

    # 解析请求报文
    for line in request_lines:
        print(line)
    # GET /favicon.ico HTTP/1.1
    request_start_line = request_lines[0]
    # 提取用户请求的文件名
    file_name = re.match(r"\w+ +(/[^ ]*)", request_start_line).group(1)
    print(file_name)

    if  "/" == file_name :  # 常量放在等号的左边
        file_name = "/index.html"

    # 打开文件读取内容
    try :
        file = open(HTML_ROOT_DIR + file_name,"rb")
    except IOError:
        response_start_line = "HTTP/1.1 404 Not found \r\n"
        response_headers = "Server: My server\r\n"
        response_body = "the file is not found"
    else:
        file_data = file.read()
        file.close()

        # 构造响应数据    # 空一格在加注释
        response_start_line = "HTTP/1.1 200 OK \r\n"
        response_headers = "Server: My server\r\n"
        response_body = file_data.decode("utf-8")

    response = response_start_line + response_headers + "\r\n" + response_body
    print("response:",response)

    # 向客户端返回相应数据
    client_socket.send(bytes(response,"utf-8"))

    # 关闭客户端连接
    client_socket.close()

if __name__ == "__main__":
                                 #AF_INET 是个常量
    server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    server_socket.bind(("",8080))
    server_socket.listen(128)

    while True:
        client_socket, client_address = server_socket.accept()  #赋值的时候有空格
        print("[%s,%s]用户连接上了"%client_address)
        hand_client_process = Process(target=hand_client,args=(client_socket,))
                    #=函数名  不能有空格
        hand_client_process.start()
        client_socket.close()   #多进程会复制 client_socket