1 files changed, 94 insertions, 0 deletions
diff --git a/modules/luci-mod-rpc/luasrc/jsonrpc.lua b/modules/luci-mod-rpc/luasrc/jsonrpc.lua
new file mode 100644
index 000000000..71c95d549
--- /dev/null
+++ b/modules/luci-mod-rpc/luasrc/jsonrpc.lua
@@ -0,0 +1,94 @@
+--[[
+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)
+require "luci.json"
+
+function resolve(mod, method)
+	local path = luci.util.split(method, ".")
+	
+	for j=1, #path-1 do
+		if not type(mod) == "table" then
+			break
+		end
+		mod = rawget(mod, path[j])
+		if not mod then
+			break
+		end
+	end
+	mod = type(mod) == "table" and rawget(mod, path[#path]) or nil
+	if type(mod) == "function" then
+		return mod
+	end
+end
+
+function handle(tbl, rawsource, ...)
+	local decoder = luci.json.Decoder()
+	local stat = luci.ltn12.pump.all(rawsource, decoder:sink())
+	local json = decoder:get()
+	local response
+	local success = false
+	
+	if stat then
+		if type(json.method) == "string"
+		 and (not json.params or type(json.params) == "table") then
+			local method = resolve(tbl, json.method)
+			if method then
+				response = reply(json.jsonrpc, json.id,
+				 proxy(method, unpack(json.params or {})))
+			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("2.0", nil,
+		 nil, {code=-32700, message="Parse error."})
+	end
+
+	return luci.json.Encoder(response, ...):source()
+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, ...)}
+	local stat = table.remove(res, 1)
+	
+	if not stat then
+		return nil, {code=-32602, message="Invalid params.", data=table.remove(res, 1)} 
+	else
+		if #res <= 1 then
+			return res[1] or luci.json.null
+		else
+			return res
+		end
+	end
+end