Python实现简单HTTP服务器(一)
一.返回固定内容
# 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 = "<h1>Python HTTP Test</h1>" 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()
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
# 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_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() 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()
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:
# 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()
三.返回动态内容(运用wsgi)
# 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_headers 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() 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()
在程序所在目录下新建文件夹(wsgitest),里面放入python文件(ctime.py)
# 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()
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。