1 files changed, 281 insertions, 0 deletions
diff --git a/libs/web/luasrc/dispatcher.lua b/libs/web/luasrc/dispatcher.lua
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+++ b/libs/web/luasrc/dispatcher.lua
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+--[[
+LuCI - Dispatcher
+
+Description:
+The request dispatcher and module dispatcher generators
+
+FileId:
+$Id$
+
+License:
+Copyright 2008 Steven Barth <steven@midlink.org>
+
+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
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+]]--
+module("luci.dispatcher", package.seeall)
+require("luci.http")
+require("luci.sys")
+require("luci.fs")
+
+-- Local dispatch database
+local tree = {nodes={}}
+
+-- Index table
+local index = {}
+
+-- Global request object
+request = {}
+
+-- Active dispatched node
+dispatched = nil
+
+-- Status fields
+built_index = false
+built_tree  = false
+
+
+-- Builds a URL
+function build_url(...)
+	return luci.http.dispatcher() .. "/" .. table.concat(arg, "/")
+end
+
+-- Sends a 404 error code and renders the "error404" template if available
+function error404(message)
+	luci.http.status(404, "Not Found")
+	message = message or "Not Found"
+
+	require("luci.template")
+	if not pcall(luci.template.render, "error404") then
+		luci.http.prepare_content("text/plain")
+		print(message)
+	end
+	return false
+end
+
+-- Sends a 500 error code and renders the "error500" template if available
+function error500(message)
+	luci.http.status(500, "Internal Server Error")
+
+	require("luci.template")
+	if not pcall(luci.template.render, "error500", {message=message}) then
+		luci.http.prepare_content("text/plain")
+		print(message)
+	end
+	return false
+end
+
+-- Creates a request object for dispatching
+function httpdispatch()
+	local pathinfo = luci.http.env.PATH_INFO or ""
+	local c = tree
+
+	for s in pathinfo:gmatch("([%w_]+)") do
+		table.insert(request, s)
+	end
+
+	dispatch()
+end
+
+-- Dispatches a request
+function dispatch()
+	if not built_tree then
+		createtree()
+	end
+
+	local c = tree
+	local track = {}
+
+	for i, s in ipairs(request) do
+		c = c.nodes[s]
+		if not c then
+			break
+		end
+
+		for k, v in pairs(c) do
+			track[k] = v
+		end
+	end
+
+
+	if track.i18n then
+		require("luci.i18n").loadc(track.i18n)
+	end
+
+	if track.setgroup then
+		luci.sys.process.setgroup(track.setgroup)
+	end
+
+	if track.setuser then
+		luci.sys.process.setuser(track.setuser)
+	end
+	
+	-- Init template engine
+	local tpl = require("luci.template")
+	tpl.viewns.translate  = function(...) return require("luci.i18n").translate(...) end
+	tpl.viewns.controller = luci.http.dispatcher()
+	tpl.viewns.uploadctrl = luci.http.dispatcher_upload()
+	tpl.viewns.media      = luci.config.main.mediaurlbase
+	tpl.viewns.resource   = luci.config.main.resourcebase
+	
+	-- Load default translation
+	require("luci.i18n").loadc("default")
+	
+
+	if c and type(c.target) == "function" then
+		dispatched = c
+
+		stat, err = pcall(c.target)
+		if not stat then
+			error500(err)
+		end
+	else
+		error404()
+	end
+end
+
+-- Generates the dispatching tree
+function createindex()
+	index = {}
+	local path = luci.sys.libpath() .. "/controller/"
+	local suff = ".lua"
+	
+	if pcall(require, "fastindex") then
+		createindex_fastindex(path, suff)
+	else
+		createindex_plain(path, suff)
+	end
+	
+	built_index = true
+end
+
+-- Uses fastindex to create the dispatching tree
+function createindex_fastindex(path, suffix)	
+	local fi = fastindex.new("index")
+	fi.add(path .. "*" .. suffix)
+	fi.add(path .. "*/*" .. suffix)
+	fi.scan()
+	
+	for k, v in pairs(fi.indexes) do
+		index[v[2]] = v[1]
+	end
+end
+
+-- Calls the index function of all available controllers
+function createindex_plain(path, suffix)
+	local controllers = luci.util.combine(
+		luci.fs.glob(path .. "*" .. suffix) or {},
+		luci.fs.glob(path .. "*/*" .. suffix) or {}
+	)
+
+	for i,c in ipairs(controllers) do
+		c = "luci.controller." .. c:sub(#path+1, #c-#suffix):gsub("/", ".")
+		stat, mod = pcall(require, c)
+
+		if stat and mod and type(mod.index) == "function" then
+			index[c] = mod.index
+		end
+	end
+end
+
+-- Creates the dispatching tree from the index
+function createtree()
+	if not built_index then
+		createindex()
+	end
+
+	for k, v in pairs(index) do
+		luci.util.updfenv(v, _M)
+		
+		local stat, mod = pcall(require, k)
+		if stat then		
+			luci.util.updfenv(v, mod)
+		end
+		
+		pcall(v)
+	end
+	
+	built_tree = true
+end
+
+-- Shortcut for creating a dispatching node
+function entry(path, target, title, order, add)
+	add = add or {}
+
+	local c = node(path)
+	c.target = target
+	c.title  = title
+	c.order  = order
+
+	for k,v in pairs(add) do
+		c[k] = v
+	end
+
+	return c
+end
+
+-- Fetch a dispatching node
+function node(...)
+	local c = tree
+
+	if arg[1] and type(arg[1]) == "table" then
+		arg = arg[1]
+	end
+
+	for k,v in ipairs(arg) do
+		if not c.nodes[v] then
+			c.nodes[v] = {nodes={}}
+		end
+
+		c = c.nodes[v]
+	end
+
+	return c
+end
+
+-- Subdispatchers --
+function alias(...)
+	local req = arg
+	return function()
+		request = req
+		dispatch()
+	end
+end
+
+function template(name)
+	require("luci.template")
+	return function() luci.template.render(name) end
+end
+
+function cbi(model)
+	require("luci.cbi")
+	require("luci.template")
+
+	return function()
+		local stat, res = pcall(luci.cbi.load, model)
+		if not stat then
+			error500(res)
+			return true
+		end
+
+		local stat, err = pcall(res.parse, res)
+		if not stat then
+			error500(err)
+			return true
+		end
+
+		luci.template.render("cbi/header")
+		res:render()
+		luci.template.render("cbi/footer")
+	end
+end