Url Desgin

Resource url are like above, all urls will return json format data

Uri	Mothod	Function	Parameters
/category	GET	list all categories
	PUT	unused
	POST	create a new category
	DELETE	unused
/category/{id}	GET	get a category's info
	PUT	update a category's info
	POST	unused
	DELETE	delete a category
/category/{id}/{num1}/{num2}	GET	list topics in category {id}, offset num1, num2
	PUT	unused
	POST	unused
	DELETE	unused
/topic	GET	list top topics in erery category
	PUT	unused
	POST	create a topic
	DELETE	unused
/topic/{id}	GET	unused
	PUT	update a topic
	POST	unused
	DELETE	delete a topic
/topic/{id}/{num1}/{num2}/	GET	get posts in topic {id}, offset num1, num2
	PUT	unused
	POST	unused
	DELETE	unused
/post	GET	unused
	PUT	unused
	POST	create a post
	DELETE	unused
/post/{id}	GET	unused
	PUT	update a post
	POST	unused
	DELETE	delete a post
/user	GET	unused
	PUT	unused
	POST	create a user
	DELETE	unused
/user/{id}	GET	get user info of {id}
	PUT	update a user's info
	POST	unused
	DELETE	delete a user