Flask 路由實現

flask路由實現

處理url和函式之間繫結關係的程式

路由控制訪問的路徑，路徑能訪問到什麼是由後端來控制的

# 路由對映表

path_map =
defroute
(url,
**kwargs)
:def
decorator
(f):
path_map[url]
= f        return f
return decorator
@route(
'/')
defhello()
:return
'hello'
@route(
'/index'
)def
index()
:return
'index'
print
(path_map)
>

# 路由裝飾器

class
(object):
def__init__
(self)
:# 定義路由表
self.routes =
defroute
(self, path=
none):
defdecorator
(func)
:            self.routes[path]
= func
return func
return decorator
def__call__
(self, environ, start_response)
:        path = environ.get(
'path_info'
)if path is
none
or path not
in self.routes.keys():
status =
"400 not found"
header =[(
'content-type'
,'text/plain; charset=utf-8')]
start_response(status, header)
return
[b'page not found'
]else
:            status =
"200 ok"
header =[(
'content-type'
,'text/plain; charset=utf-8')]
start_response(status, header)
resp = self.routes.get(path)
if resp is
none
:                status =
"400 not found"
header =[(
'content-type'
,'text/plain; charset=utf-8')]
start_response(status, header)
return
[b'page not found'
]else
:return
[resp(
).encode()]
)# 檢視函式
'/')
defhello()
:return
'hello'
'/login'
)def
login()
:return
'login'
'/change'
)def
change()
:return
'update pwd'
if __name__ ==
'__main__'
:# 啟動服務
from wsgiref.******_server import make_server
server = make_server(
'127.0.0.1'
,8888
server.serve_forever(
)

from wsgiref.******_server import make_server

defhello()
:return
'hello'
deflogin()
:return
'login'
defchange()
:return
'update pwd'
# 路由表
path_dict =
def(environ, start_response)
:    path = environ.get(
'path_info'
)if path is
none
or path not
in path_dict.keys():
status =
"400 not found"
header =[(
'content-type'
,'text/plain; charset=utf-8')]
start_response(status, header)
return
[b'page not found'
]else
:        status =
"200 ok"
header =[(
'content-type'
,'text/plain; charset=utf-8')]
start_response(status, header)
resp = path_dict.get(path)
if resp is
none
:            status =
"400 not found"
header =[(
'content-type'
,'text/plain; charset=utf-8')]
start_response(status, header)
return
[b'page not found'
]else
:return
[resp(
).encode()]
if __name__ ==
'__main__'
:    server = make_server(
'127.0.0.1'
,8888
server.serve_forever(
)

url_map =

defroute
(option)
:def
inner
(func,
*args,
**kwargs)
:# return func(*args, **kwargs)
url_map[option[
'path']]
= func
return inner
@route(
)def
index
(request)
:pass

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