Python实现简单HTTP服务器，,Python实现简单

Python实现简单HTTP服务器(一)

一.返回固定内容

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coding:utf-8

import socket

from multiprocessing import Process

def handle_client(client_socket):
"""
处理客户端请求
"""
request_data = client_socket.recv(1024)
print("request data:", request_data)
# 构造响应数据
response_start_line = "HTTP/1.1 200 OK\r\n"
response_headers = "Server: My server\r\n"
response_body = "

Python HTTP Test

"
response = response_start_line + response_headers + "\r\n" + response_body

# 向客户端返回响应数据client_socket.send(bytes(response, "utf-8"))# 关闭客户端连接client_socket.close()

if name == "main":
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(("", 8000))
server_socket.listen(128)

while True:    client_socket, client_address = server_socket.accept()    print("[%s, %s]用户连接上了" % client_address)    handle_client_process = Process(target=handle_client, args=(client_socket,))    handle_client_process.start()    client_socket.close()

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运行程序，打开浏览器输入：http://127.0.0.1:8000/，显示如下：

二.返回静态文件内容

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coding:utf-8

import socket
import re

from multiprocessing import Process

设置静态文件根目录

HTML_ROOT_DIR = "./html"

def handle_client(client_socket):
"""
处理客户端请求
"""
# 获取客户端请求数据
request_data = client_socket.recv(1024)
print("request data:", request_data)
request_lines = request_data.splitlines()
# 解析请求报文
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.decode("utf-8")).group(1)

if "/" == file_name:    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    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_bodyprint("response data:", response)# 向客户端返回响应数据client_socket.send(bytes(response, "utf-8"))# 关闭客户端连接client_socket.close()

if name == "main":
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind(("", 8000))
server_socket.listen(128)

while True:    client_socket, client_address = server_socket.accept()    print("[%s, %s]用户连接上了" % client_address)    handle_client_process = Process(target=handle_client, args=(client_socket,))    handle_client_process.start()    client_socket.close()

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在程序所在目录下新建文件夹(html)，里面放入HTML文件，运行程序，打开浏览器输入：http://127.0.0.1:8000/，显示如下：

改为面向对象的程序：

复制代码

coding:utf-8

import socket
import re

from multiprocessing import Process

设置静态文件根目录

HTML_ROOT_DIR = "./html"

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

def start(self):    self.server_socket.listen(128)    while True:        client_socket, client_address = self.server_socket.accept()        print("[%s, %s]用户连接上了" % client_address)        handle_client_process = Process(target=self.handle_client, args=(client_socket,))        handle_client_process.start()        client_socket.close()def handle_client(self, client_socket):    """    处理客户端请求    """    # 获取客户端请求数据    request_data = client_socket.recv(1024)    print("request data:", request_data)    request_lines = request_data.splitlines()    # 解析请求报文    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.decode("utf-8")).group(1)    if "/" == file_name:        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        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 data:", response)    # 向客户端返回响应数据    client_socket.send(bytes(response, "utf-8"))    # 关闭客户端连接    client_socket.close()def bind(self, port):    self.server_socket.bind(("", port))

def main():
http_server = HTTPServer()
http_server.bind(8000)
http_server.start()

if name == "main":
main()
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三.返回动态内容(运用wsgi）

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coding:utf-8

import socket
import re
import sys

from multiprocessing import Process

设置静态文件根目录

HTML_ROOT_DIR = "./html"

设置动态文件根目录

WSGI_PYTHON_DIR = "./wsgitest"

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

def start(self):    self.server_socket.listen(128)    while True:        client_socket, client_address = self.server_socket.accept()        print("[%s, %s]用户连接上了" % client_address)        handle_client_process = Process(target=self.handle_client, args=(client_socket,))        handle_client_process.start()        client_socket.close()def start_response(self, status, headers):    response_headers = "HTTP/1.1 " + status + "\r\n"    for header in headers:        response_headers += "%s: %s\r\n" % header    self.response_headers = response_headersdef handle_client(self, client_socket):    """    处理客户端请求    """    # 获取客户端请求数据    request_data = client_socket.recv(1024)    print("request data:", request_data)    request_lines = request_data.splitlines()    for line in request_lines:        print(line)    # 解析请求报文    request_start_line = request_lines[0]    # 提取用户请求的文件名及请求方法    file_name = re.match(r"\w+ +(/[^ ]*) ", request_start_line.decode("utf-8")).group(1)    method = re.match(r"(\w+) +/[^ ]* ", request_start_line.decode("utf-8")).group(1)    # 处理动态文件    if file_name.endswith(".py"):        try:            m = __import__(file_name[1:-3])        except Exception:            self.response_headers = "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_headers + "\r\n" + response_body    # 处理静态文件    else:        if "/" == file_name:            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            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 data:", response)    # 向客户端返回响应数据    client_socket.send(bytes(response, "utf-8"))    # 关闭客户端连接    client_socket.close()def bind(self, port):    self.server_socket.bind(("", port))

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

if name == "main":
main()
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在程序所在目录下新建文件夹(wsgitest)，里面放入python文件(ctime.py)

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coding:utf-8

import time

def application(env, start_response):

status = "200 OK"headers = [("Content-Type", "text/plain")]start_response(status, headers)return time.ctime()

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运行程序，打开浏览器输入:http://127.0.0.1:8000/ctime.py，显示如下：

每刷新一次就执行相应python代码。

https://www.cnblogs.com/xinyangsdut/p/9099623.html

Python实现简单HTTP服务器