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Translation of meth from Python to Hy

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Guillermo Vaya 2013-09-21 02:08:10 +02:00
parent 7a403a2660
commit d495473c54
2 changed files with 54 additions and 58 deletions
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54
hy/contrib/meth.hy Normal file
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;;; Meth
;; based on paultag's meth library to access a Flask based application
(defmacro route [name path params code]
"Default get request"
(quasiquote (let [[deco ((getattr app "route") (unquote path))]]
(with-decorator deco
(defn (unquote name) (unquote params) (unquote-splice code))))))
(defmacro route-with-methods [name path params code methods]
"Same as route but with an extra methods array to specify HTTP methods"
(quasiquote (let [[deco (kwapply ((getattr app "route") (unquote path))
{"methods" (unquote methods)})]]
(with-decorator deco
(defn (unquote name) (unquote params) (unquote-splice code))))))
;; Some macro examples
(defmacro post-route [name path params code]
"Post request"
`(route-with-methods ~name ~path ~params ~code ["POST"]))
(defmacro put-route [name path params code]
"Put request"
`(route-with-methods ~name ~path ~params ~code ["PUT"]))
(defmacro delete-route [name path params code]
"Delete request"
`(route-with-methods ~name ~path ~params ~code ["DELETE"]))
;;; Simple example application
;;; Requires to have Flask installed
;; (import [flask [Flask]])
;; (setv app (Flask "__main__"))
;; (require methy)
;; (print "setup / with GET")
;; (route get-index "/" [] (str "Hy world!"))
;; (print "setup /post with POST")
;; (post-route post-index "/post" [] (str "Hy post world!"))
;; (route-with-methods both-index "/both" []
;; (str "Hy to both worlds!") ["GET" "POST"])
;; (.run app)
;;; Now you can do:
;;; curl 127.0.0.1:5000
;;; curl -X POST 127.0.0.1:5000/post
;;; curl -X POST 127.0.0.1:5000/both
;;; curl 127.0.0.1:5000/both

58
hy/contrib/meth.py
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# Copyright (c) 2013 Paul Tagliamonte <paultag@debian.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
from hy.models.expression import HyExpression
from hy.models.symbol import HySymbol
from hy.models.string import HyString
from hy.models.list import HyList
from hy.models.dict import HyDict
from hy.macros import macro
def router(tree, rkwargs=None):
tree = HyExpression(tree)
name = tree.pop(0)
path = tree.pop(0)
tree.insert(0, HySymbol("fn"))
tree = HyExpression([HySymbol("def"), name, tree])
route = HyExpression([HySymbol(".route"), HySymbol("app"), path])
if rkwargs:
route = HyExpression([HySymbol("kwapply"), route,
HyDict({HyString("methods"): rkwargs})])
return HyExpression([HySymbol("with_decorator"), route, tree])
@macro("route")
def route_macro(*tree):
return router(tree)
@macro("post_route")
def post_route_macro(*tree):
return router(tree, rkwargs=HyList([HyString("POST")]))
@macro("get_route")
def get_route_macro(*tree):
return router(tree, rkwargs=HyList([HyString("GET")]))