Python基於wsgi的miniweb框架及伺服器
阿新 • • 發佈:2019-01-09
05_服務wsgi協議的伺服器.py
import socket
import reimport multiprocessing
import 多程序http伺服器.mini_frame05
class WebServer(object):
def __init__(self):
# 1. 建立套接字
self.tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.tcp_server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
# 2. 繫結
self.tcp_server_socket.bind(("", 7890))
# 3. 變為監聽套接字
self.tcp_server_socket.listen(128)
def __del__(self):
# 6. 關閉監聽套接字
self.tcp_server_socket.close()
def service_client(self, new_socket):
"""為客戶端返回資料"""
# 1.接收瀏覽器傳送過來的request請求(符合http協議的格式) ,即http請求
# GET /index.html HTTP/1.1
request = new_socket.recv(1024).decode("utf-8")
request_lines = request.splitlines()
print("")
print(">" * 20)
print(request_lines)
# 2.通過正則解析 GET /index.html HTTP/1.1 獲取檔名 即 /index.html
file_name = ""
ret = re.match(r"[^/]+(/[^ ]*)", request_lines[0])
if ret:
file_name = ret.group(1)
if file_name == "/":
file_name = "/index.html"
if not file_name.endswith('.py'): # 靜態資源
# 3. 通過檔名 /index.html 開啟檔案讀取資料後 組織符合http格式的response
# 即應答報文 header + body 給瀏覽器
try:
f = open("./html" + file_name, "rb")
except:
response = "HTTP/1.1 404 NOT FOUND\r\n"
response += "\r\n"
response += "------file not found-----"
new_socket.send(response.encode("utf-8"))
else:
# 3.1 準備傳送給瀏覽器的資料---response_header
response_header = "HTTP/1.1 200 OK\r\n"
response_header += "\r\n"
# 3.2 準備傳送給瀏覽器的資料---response_body
response_body = f.read()
f.close()
# 將response header傳送給瀏覽器
new_socket.send(response_header.encode("utf-8"))
# 將response body傳送給瀏覽器
new_socket.send(response_body)
else:
# 傳參字典
env = dict()
env["url"] = file_name
# 呼叫介面
response_body = 多程序http伺服器.mini_frame05.application(env, self.set_respose_header)
# 需要函式呼叫後才有例項屬性,設定應答頭
response_header = "HTTP/1.1 %s\r\n" % self.statue
# response_header += "%s:%s\r\n" % (self.headers[0][0], self.headers[0][1])
for i in self.headers:
response_header += "%s:%s\r\n" % (i[0], i[1])
response_header += "\r\n"
# 設定應答體
response = response_header + response_body
new_socket.send(response.encode("utf-8"))
# 關閉套接
new_socket.close()
def set_respose_header(self, statue, headers):
self.statue = statue
self.headers = headers
def run_for_ever(self):
"""用來完成整體的控制"""
while True:
# 4. 等待新客戶端的連結
new_socket, client_addr = self.tcp_server_socket.accept()
# 5. 為這個客戶端服務
p = multiprocessing.Process(target=self.service_client, args=(new_socket,))
p.start()
new_socket.close()
def main():
"""業務流程"""
my_web_server = WebServer()
my_web_server.run_for_ever()
if __name__ == "__main__":
main()
mini_frame05.py
# 處理動態資源
def index():
return "index is show"
def center():
return "center is show"
def profile():
return "profile is show"
# 符合wsgi協議的介面
# environ(字典):儲存請求資訊 index.py
# start_response(函式的引用): 響應頭response_header
# 1.狀態碼 2.響應頭列表headers
# return: 響應體response_body
def application(environ, start_response):
file_name = environ["url"]
start_response('200 OK', [('Content-Type', 'text/html;charset=utf-8')])
if file_name == "/index.py":
return index()
elif file_name == "/center.py":
return center()
elif file_name == "/profile.py":
return profile()
else:
return "%s 沒有發現對應的函式" % file_name