RPC part #2

1 files changed, 86 insertions, 0 deletions

diff --git a/modules/rpc/luasrc/jsonrpc.lua b/modules/rpc/luasrc/jsonrpc.lua
new file mode 100644
index 000000000..61524476a
--- /dev/null
+++ b/modules/rpc/luasrc/jsonrpc.lua
@@ -0,0 +1,86 @@
+--[[
+LuCI - Lua Configuration Interface
+
+Copyright 2008 Steven Barth <steven@midlink.org>
+Copyright 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+module("luci.jsonrpc", package.seeall)
+
+function resolve(mod, method)
+	local path = luci.util.split(value, ".")
+	
+	for j=1, #path-1 do
+		if not type(mod) == "table" then
+			break
+		end
+		mod = mod[path[j]]
+		if not mod then
+			break
+		end
+	end
+	mod = type(mod) == "table" and mod[path[#path]] or nil
+	if type(mod) == "function" then
+		return mod
+	end
+end
+
+function handle(tbl, rawdata)
+	local stat, json = luci.util.copcall(luci.json.Decode, rawdata)
+	local response
+	local success = false
+	
+	if stat then
+		if type(json.method) == "string"
+		 and (not json.params or type(json.params) == "table") then
+			if tbl[json.method] then
+				response = reply(json.jsonrpc, json.id,
+				 proxy(resolve(tbl, json.method), unpack(json.params)))
+			else
+		 		response = reply(json.jsonrpc, json.id,
+			 	 nil, {code=-32601, message="Method not found."})
+			end
+		else
+			response = reply(json.jsonrpc, json.id,
+			 nil, {code=-32600, message="Invalid request."})
+		end
+	else
+		response = reply(json.jsonrpc, nil,
+		 nil, {code=-32700, message="Parse error."})
+	end
+
+	return luci.json.Encode(response)
+end
+
+function reply(jsonrpc, id, res, err)
+	require "luci.json"
+	id = id or luci.json.Null
+	
+	-- 1.0 compatibility
+	if jsonrpc ~= "2.0" then
+		jsonrpc = nil
+		res = res or luci.json.Null
+		err = err or luci.json.Null
+	end
+	
+	return {id=id, result=res, error=err, jsonrpc=jsonrpc}
+end
+
+function proxy(method, ...)
+	local res = {luci.util.copcall(method, unpack(params))}
+	local stat = table.remove(res, 1)
+	
+	if not stat then
+		return nil, {code=-32602, message="Invalid params.", data=table.remove(res, 1)} 
+	else
+		return (#res <= 1) and res[1] or res
+	end
+end
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