python（一）简单WEB服务器

最新推荐文章于 2025-06-20 09:06:57 发布

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最新推荐文章于 2025-06-20 09:06:57 发布

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CC 4.0 BY-SA版权

文章标签： python

本文链接：https://blog.youkuaiyun.com/callzjy/article/details/78014108

本文介绍了一个使用Python实现的简易Web服务器代码，该服务器利用多进程处理客户端请求，并通过不同的框架展示静态文件及处理路由。

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# coding:utf-8

import socket
import re
import sys

from multiprocessing import Process
# from TGWebFramework import app
# from Django import app

HTML_ROOT_DIR = "./html"


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

    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):
        request_data = client_socket.recv(1024)
        print("request data:", request_data)
        request_lines = request_data.splitlines()
        for line in request_lines:
            print(line)
        request_start_line = request_lines[0]
        print(request_start_line.decode("utf-8"))
        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)
        env = {
            "PATH_INFO": file_name,
            "METHOD": method
        }
        response_body = self.app(env, self.start_response)
        response = self.response_headers + "\r\n" + response_body
        client_socket.send(bytes(response, "utf-8"))
        client_socket.close()

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


def main():
    if len(sys.argv) < 2:
        sys.exit("python TGWebServer.py Module:app")
    module_name, app_name = sys.argv[1].split(":")
    m = __import__(module_name)
    app = getattr(m, app_name)
    http_server = HTTPServer(app)
    http_server.bind(9999)
    http_server.start()


if __name__ == "__main__":
    main()


配置启动参数

如果不配置启动参数，直接导入app，则web服务器代码如下：

# coding:utf-8

import socket
import re
import sys

from multiprocessing import Process
# from TGWebFramework import app
from Django import app

HTML_ROOT_DIR = "./html"


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

    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):
        request_data = client_socket.recv(1024)
        print("request data:", request_data)
        request_lines = request_data.splitlines()
        for line in request_lines:
            print(line)
        request_start_line = request_lines[0]
        print(request_start_line.decode("utf-8"))
        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)
        env = {
            "PATH_INFO": file_name,
            "METHOD": method
        }
        response_body = self.app(env, self.start_response)
        response = self.response_headers + "\r\n" + response_body
        client_socket.send(bytes(response, "utf-8"))
        client_socket.close()

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


def main():
    # if len(sys.argv) < 2:
    #     sys.exit("python TGWebServer.py Module:app")
    # module_name, app_name = sys.argv[1].split(":")
    # m = __import__(module_name)
    # app = getattr(m, app_name)
    http_server = HTTPServer(app)
    http_server.bind(9999)
    http_server.start()


if __name__ == "__main__":
    main()

即开始处选择

# from TGWebFramework import app
from Django import app

和结尾处注释

    # if len(sys.argv) < 2:
    #     sys.exit("python TGWebServer.py Module:app")
    # module_name, app_name = sys.argv[1].split(":")
    # m = __import__(module_name)
    # app = getattr(m, app_name)

程序启动后效果如下（在浏览器地址栏处输入http://127.0.0.1:9999/sayhello）

附两者框架处理代码

TGWebFramework.py

# coding:utf-8

import time

HTML_ROOT_DIR = "./html"


class Application(object):
    def __init__(self, urls):
        self.urls = urls

    def __call__(self, env, start_response):
        path = env.get("PATH_INFO", "/")
        if path.startswith("/static"):
            file_name = path[7:]
            try:
                file = open(HTML_ROOT_DIR + file_name, "rb")
            except IOError:
                status = "404 Not Found"
                headers = []
                start_response(status, headers)
                return "not found"
            else:
                file_data = file.read()
                file.close()
                status = "200 OK"
                headers = []
                start_response(status, headers)
                return file_data.decode("utf-8")

        for url, handler in self.urls:
            if path == url:
                return handler(env, start_response)

        status = "404 Not Found"
        headers = []
        start_response(status, headers)
        return "not found"


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


def say_hello(env, start_response):
    status = "200 OK"
    headers = [
        ("Content-Type", "text/plain")
    ]
    start_response(status, headers)
    return "hello targetcloud"


def say_haha(env, start_response):
    status = "200 OK"
    headers = [
        ("Content-Type", "text/plain")
    ]
    start_response(status, headers)
    return "hello haha"

urls = [
            ("/", show_ctime),
            ("/ctime", show_ctime),
            ("/sayhello", say_hello),
            ("/sayhaha", say_haha),
        ]
app = Application(urls)

Django.py

# coding:utf-8

import time

HTML_ROOT_DIR = "./html"


class Application(object):
    def __init__(self, urls):
        self.urls = urls

    def __call__(self, env, start_response):
        path = env.get("PATH_INFO", "/")
        if path.startswith("/static"):
            file_name = path[7:]
            try:
                file = open(HTML_ROOT_DIR + file_name, "rb")
            except IOError:
                status = "404 Not Found"
                headers = []
                start_response(status, headers)
                return "not found"
            else:
                file_data = file.read()
                file.close()
                status = "200 OK"
                headers = []
                start_response(status, headers)
                return file_data.decode("utf-8")

        for url, handler in self.urls:
            if path == url:
                return handler(env, start_response)

        status = "404 Not Found"
        headers = []
        start_response(status, headers)
        return "not found"


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


def say_hello(env, start_response):
    status = "200 OK"
    headers = [
        ("Content-Type", "text/plain")
    ]
    start_response(status, headers)
    return "hello django"


def say_haha(env, start_response):
    status = "200 OK"
    headers = [
        ("Content-Type", "text/plain")
    ]
    start_response(status, headers)
    return "haha django"


urls = [
        ("/", show_ctime),
        ("/ctime", show_ctime),
        ("/sayhello", say_hello),
        ("/sayhaha", say_haha),
        ]
app = Application(urls)