--[[ LuCI - Dispatcher Description: The request dispatcher and module dispatcher generators FileId: $Id$ License: Copyright 2008 Steven Barth 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