mini web框架-1-文件结构

文件结构

├── dynamic ---存放py模块
│ └── my_web.py
├── templates ---存放模板文件
│ ├── center.html
│ ├── index.html
│ ├── location.html
│ └── update.html
├── static ---存放静态的资源文件
│ ├── css
│ │ ├── bootstrap.min.css
│ │ ├── main.css
│ │ └── swiper.min.css
│ └── js
│ ├── a.js
│ ├── bootstrap.min.js
│ ├── jquery-1.12.4.js
│ ├── jquery-1.12.4.min.js
│ ├── jquery.animate-colors.js
│ ├── jquery.animate-colors-min.js
│ ├── jquery.cookie.js
│ ├── jquery-ui.min.js
│ ├── server.js
│ ├── swiper.jquery.min.js
│ ├── swiper.min.js
│ └── zepto.min.js
└── web_server.py ---mini web服务器

my_web.py

import time
def application(environ, start_response):
 status = '200 OK'
 response_headers = [('Content-Type', 'text/html')]
 start_response(status, response_headers)
 return str(environ) + '==Hello world from a simple WSGI application!--->%s\n' % time.ctime()

web_server.py

import select
import time
import socket
import sys
import re
import multiprocessing
class WSGIServer(object):
 """定义一个WSGI服务器的类"""
 def __init__(self, port, documents_root, app):
 # 1. 创建套接字
 self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 # 2. 绑定本地信息
 self.server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 self.server_socket.bind(("", port))
 # 3. 变为监听套接字
 self.server_socket.listen(128)
 # 设定资源文件的路径
 self.documents_root = documents_root
 # 设定web框架可以调用的函数(对象)
 self.app = app
 def run_forever(self):
 """运行服务器"""
 # 等待对方链接
 while True:
 new_socket, new_addr = self.server_socket.accept()
 # 创建一个新的进程来完成这个客户端的请求任务
 new_socket.settimeout(3) # 3s
 new_process = multiprocessing.Process(target=self.deal_with_request, args=(new_socket,))
 new_process.start()
 new_socket.close()
 def deal_with_request(self, client_socket):
 """以长链接的方式，为这个浏览器服务器"""
 while True:
 try:
 request = client_socket.recv(1024).decode("utf-8")
 except Exception as ret:
 print("========>", ret)
 client_socket.close()
 return
 # 判断浏览器是否关闭
 if not request:
 client_socket.close()
 return
 request_lines = request.splitlines()
 for i, line in enumerate(request_lines):
 print(i, line)
 # 提取请求的文件(index.html)
 # GET /a/b/c/d/e/index.html HTTP/1.1
 ret = re.match(r"([^/]*)([^ ]+)", request_lines[0])
 if ret:
 print("正则提取数据:", ret.group(1))
 print("正则提取数据:", ret.group(2))
 file_name = ret.group(2)
 if file_name == "/":
 file_name = "/index.html"
 # 如果不是以py结尾的文件，认为是普通的文件
 if not file_name.endswith(".py"):
 # 读取文件数据
 try:
 f = open(self.documents_root+file_name, "rb")
 except:
 response_body = "file not found, 请输入正确的url"
 response_header = "HTTP/1.1 404 not found\r\n"
 response_header += "Content-Type: text/html; charset=utf-8\r\n"
 response_header += "Content-Length: %d\r\n" % (len(response_body))
 response_header += "\r\n"
 response = response_header + response_body
 # 将header返回给浏览器
 client_socket.send(response.encode('utf-8'))
 else:
 content = f.read()
 f.close()
 response_body = content
 response_header = "HTTP/1.1 200 OK\r\n"
 response_header += "Content-Length: %d\r\n" % (len(response_body))
 response_header += "\r\n"
 # 将header返回给浏览器
 client_socket.send(response_header.encode('utf-8') + response_body)
 # 以.py结尾的文件，就认为是浏览需要动态的页面
 else:
 # 准备一个字典，里面存放需要传递给web框架的数据
 env = dict()
 # 存web返回的数据
 response_body = self.app(env, self.set_response_headers)
 # 合并header和body
 response_header = "HTTP/1.1 {status}\r\n".format(status=self.headers[0])
 response_header += "Content-Type: text/html; charset=utf-8\r\n"
 response_header += "Content-Length: %d\r\n" % len(response_body)
 for temp_head in self.headers[1]:
 response_header += "{0}:{1}\r\n".format(*temp_head)
 response = response_header + "\r\n"
 response += response_body
 client_socket.send(response.encode('utf-8'))
 def set_response_headers(self, status, headers):
 """这个方法，会在 web框架中被默认调用"""
 response_header_default = [
 ("Data", time.time()),
 ("Server", "ItCast-python mini web server")
 ]
 # 将状态码/相应头信息存储起来
 # [字符串, [xxxxx, xxx2]]
 self.headers = [status, response_header_default + headers]
# 设置静态资源访问的路径
g_static_document_root = "./static"
# 设置动态资源访问的路径
g_dynamic_document_root = "./dynamic"
def main():
 """控制web服务器整体"""
 # python3 xxxx.py 7890
 if len(sys.argv) == 3:
 # 获取web服务器的port
 port = sys.argv[1]
 if port.isdigit():
 port = int(port)
 # 获取web服务器需要动态资源时，访问的web框架名字
 web_frame_module_app_name = sys.argv[2]
 else:
 print("运行方式如: python3 xxx.py 7890 my_web_frame_name:application")
 return
 print("http服务器使用的port:%s" % port)
 # 将动态路径即存放py文件的路径，添加到path中，这样python就能够找到这个路径了
 sys.path.append(g_dynamic_document_root)
 ret = re.match(r"([^:]*):(.*)", web_frame_module_app_name)
 if ret:
 # 获取模块名
 web_frame_module_name = ret.group(1)
 # 获取可以调用web框架的应用名称
 app_name = ret.group(2)
 # 导入web框架的主模块
 web_frame_module = __import__(web_frame_module_name)
 # 获取那个可以直接调用的函数(对象)
 app = getattr(web_frame_module, app_name) 
 # print(app) # for test
 # 启动http服务器
 http_server = WSGIServer(port, g_static_document_root, app)
 # 运行http服务器
 http_server.run_forever()
if __name__ == "__main__":
 main()

mini web框架-2-显示页面

dynamic/my_web.py (更新)

import time
import os
template_root = "./templates"
def index(file_name):
 """返回index.py需要的页面内容"""
 # return "hahha" + os.getcwd() # for test 路径问题
 try:
 file_name = file_name.replace(".py", ".html")
 f = open(template_root + file_name)
 except Exception as ret:
 return "%s" % ret
 else:
 content = f.read()
 f.close()
 return content
def center(file_name):
 """返回center.py需要的页面内容"""
 # return "hahha" + os.getcwd() # for test 路径问题
 try:
 file_name = file_name.replace(".py", ".html")
 f = open(template_root + file_name)
 except Exception as ret:
 return "%s" % ret
 else:
 content = f.read()
 f.close()
 return content
def application(environ, start_response):
 status = '200 OK'
 response_headers = [('Content-Type', 'text/html')]
 start_response(status, response_headers)
 file_name = environ['PATH_INFO']
 if file_name == "/index.py":
 return index(file_name)
 elif file_name == "/center.py":
 return center(file_name)
 else:
 return str(environ) + '==Hello world from a simple WSGI application!--->%s\n' % time.ctime()

web_server.py (更新)

import select
import time
import socket
import sys
import re
import multiprocessing
class WSGIServer(object):
 """定义一个WSGI服务器的类"""
 def __init__(self, port, documents_root, app):
 # 1. 创建套接字
 self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 # 2. 绑定本地信息
 self.server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 self.server_socket.bind(("", port))
 # 3. 变为监听套接字
 self.server_socket.listen(128)
 # 设定资源文件的路径
 self.documents_root = documents_root
 # 设定web框架可以调用的函数(对象)
 self.app = app
 def run_forever(self):
 """运行服务器"""
 # 等待对方链接
 while True:
 new_socket, new_addr = self.server_socket.accept()
 # 创建一个新的进程来完成这个客户端的请求任务
 new_socket.settimeout(3) # 3s
 new_process = multiprocessing.Process(target=self.deal_with_request, args=(new_socket,))
 new_process.start()
 new_socket.close()
 def deal_with_request(self, client_socket):
 """以长链接的方式，为这个浏览器服务器"""
 while True:
 try:
 request = client_socket.recv(1024).decode("utf-8")
 except Exception as ret:
 print("========>", ret)
 client_socket.close()
 return
 # 判断浏览器是否关闭
 if not request:
 client_socket.close()
 return
 request_lines = request.splitlines()
 for i, line in enumerate(request_lines):
 print(i, line)
 # 提取请求的文件(index.html)
 # GET /a/b/c/d/e/index.html HTTP/1.1
 ret = re.match(r"([^/]*)([^ ]+)", request_lines[0])
 if ret:
 print("正则提取数据:", ret.group(1))
 print("正则提取数据:", ret.group(2))
 file_name = ret.group(2)
 if file_name == "/":
 file_name = "/index.html"
 # 如果不是以py结尾的文件，认为是普通的文件
 if not file_name.endswith(".py"):
 # 读取文件数据
 try:
 print(self.documents_root+file_name)
 f = open(self.documents_root+file_name, "rb")
 except:
 response_body = "file not found, 请输入正确的url"
 response_header = "HTTP/1.1 404 not found\r\n"
 response_header += "Content-Type: text/html; charset=utf-8\r\n"
 response_header += "Content-Length: %d\r\n" % (len(response_body))
 response_header += "\r\n"
 response = response_header + response_body
 # 将header返回给浏览器
 client_socket.send(response.encode('utf-8'))
 else:
 content = f.read()
 f.close()
 response_body = content
 response_header = "HTTP/1.1 200 OK\r\n"
 response_header += "Content-Length: %d\r\n" % (len(response_body))
 response_header += "\r\n"
 # 将header返回给浏览器
 client_socket.send(response_header.encode('utf-8') + response_body)
 # 以.py结尾的文件，就认为是浏览需要动态的页面
 else:
 # 准备一个字典，里面存放需要传递给web框架的数据
 env = dict()
 # ----------更新---------
 env['PATH_INFO'] = file_name # 例如 index.py
 # 存web返回的数据
 response_body = self.app(env, self.set_response_headers)
 # 合并header和body
 response_header = "HTTP/1.1 {status}\r\n".format(status=self.headers[0])
 response_header += "Content-Type: text/html; charset=utf-8\r\n"
 response_header += "Content-Length: %d\r\n" % len(response_body.encode("utf-8"))
 for temp_head in self.headers[1]:
 response_header += "{0}:{1}\r\n".format(*temp_head)
 response = response_header + "\r\n"
 response += response_body
 client_socket.send(response.encode('utf-8'))
 def set_response_headers(self, status, headers):
 """这个方法，会在 web框架中被默认调用"""
 response_header_default = [
 ("Data", time.time()),
 ("Server", "ItCast-python mini web server")
 ]
 # 将状态码/相应头信息存储起来
 # [字符串, [xxxxx, xxx2]]
 self.headers = [status, response_header_default + headers]
# 设置静态资源访问的路径
g_static_document_root = "./static"
# 设置动态资源访问的路径
g_dynamic_document_root = "./dynamic"
def main():
 """控制web服务器整体"""
 # python3 xxxx.py 7890
 if len(sys.argv) == 3:
 # 获取web服务器的port
 port = sys.argv[1]
 if port.isdigit():
 port = int(port)
 # 获取web服务器需要动态资源时，访问的web框架名字
 web_frame_module_app_name = sys.argv[2]
 else:
 print("运行方式如: python3 xxx.py 7890 my_web_frame_name:app")
 return
 print("http服务器使用的port:%s" % port)
 # 将动态路径即存放py文件的路径，添加到path中，这样python就能够找到这个路径了
 sys.path.append(g_dynamic_document_root)
 ret = re.match(r"([^:]*):(.*)", web_frame_module_app_name)
 if ret:
 # 获取模块名
 web_frame_module_name = ret.group(1)
 # 获取可以调用web框架的应用名称
 app_name = ret.group(2)
 # 导入web框架的主模块
 web_frame_module = __import__(web_frame_module_name)
 # 获取那个可以直接调用的函数(对象)
 app = getattr(web_frame_module, app_name) 
 # print(app) # for test
 # 启动http服务器
 http_server = WSGIServer(port, g_static_document_root, app)
 # 运行http服务器
 http_server.run_forever()
if __name__ == "__main__":
 main()

浏览器打开看效果

mini web框架-3-替换模板

dynamic/my_web.py

import time
import os
import re
template_root = "./templates"
def index(file_name):
 """返回index.py需要的页面内容"""
 # return "hahha" + os.getcwd() # for test 路径问题
 try:
 file_name = file_name.replace(".py", ".html")
 f = open(template_root + file_name)
 except Exception as ret:
 return "%s" % ret
 else:
 content = f.read()
 f.close()
 # --------更新-------
 data_from_mysql = "数据还没有敬请期待...."
 content = re.sub(r"\{%content%\}", data_from_mysql, content)
 return content
def center(file_name):
 """返回center.py需要的页面内容"""
 # return "hahha" + os.getcwd() # for test 路径问题
 try:
 file_name = file_name.replace(".py", ".html")
 f = open(template_root + file_name)
 except Exception as ret:
 return "%s" % ret
 else:
 content = f.read()
 f.close()
 # --------更新-------
 data_from_mysql = "暂时没有数据,,,,~~~~(>_<)~~~~ "
 content = re.sub(r"\{%content%\}", data_from_mysql, content)
 return content
def application(environ, start_response):
 status = '200 OK'
 response_headers = [('Content-Type', 'text/html')]
 start_response(status, response_headers)
 file_name = environ['PATH_INFO']
 if file_name == "/index.py":
 return index(file_name)
 elif file_name == "/center.py":
 return center(file_name)
 else:
 return str(environ) + '==Hello world from a simple WSGI application!--->%s\n' % time.ctime()

浏览器打开看效果

Python mini web框架

mini web框架-1-文件结构

mini web框架-2-显示页面

mini web框架-3-替换模板

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