webmcp

annotate framework/bin/mcp.lua @ 215:ba3dd4a17e3d

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Some code cleanup/rearrangement for request handling
author jbe
date Mon Jan 12 01:48:11 2015 +0100 (2015-01-12)
parents 6ac7133bb58e
children 7f9c9c4434a1
rev   line source
jbe@203 1 #!/usr/bin/env moonbridge
jbe/bsw@0 2
jbe@203 3 WEBMCP_VERSION = "2.0.0_devel"
jbe@64 4
jbe@203 5 -- check if interactive mode
jbe@203 6 if listen then -- defined by moonbridge
jbe@203 7 WEBMCP_MODE = "listen"
jbe@203 8 else
jbe@203 9 WEBMCP_MODE = "interactive"
jbe@64 10 end
jbe@203 11
jbe@206 12 -- configuration names are provided as 4th, 5th, etc. argument
jbe@206 13 WEBMCP_CONFIG_NAMES = {select(4, ...)}
jbe@203 14
jbe@203 15 -- determine framework and bath path from command line arguments
jbe@203 16 -- or print usage synopsis (if applicable)
jbe@68 17 do
jbe@206 18 local arg1, arg2, arg3 = ...
jbe@203 19 local helpout
jbe@203 20 if
jbe@203 21 arg1 == "-h" or arg1 == "--help" or
jbe@206 22 arg2 == "-h" or arg2 == "--help" -- if first arg is provided by wrapper
jbe@203 23 then
jbe@203 24 helpout = io.stdout
jbe@203 25 elseif
jbe@206 26 #config_args < 1 or
jbe@206 27 (WEBMCP_MODE == "interactive") ~= (arg3 == "INTERACTIVE")
jbe@203 28 then
jbe@203 29 helpout = io.stderr
jbe@203 30 end
jbe@206 31 helpout:write("Usage: moonbridge -- <framework path>/bin/mcp.lua <framework path> <app base path> <app name> <config name> [<config name> ...]\n")
jbe@206 32 helpout:write(" or: lua -i <framework path>/bin/mcp.lua <framework path> <app base path> INTERACTIVE <config name> [<config name> ...]\n")
jbe@203 33 if helpout then
jbe@203 34 if helpout == io.stderr then
jbe@203 35 return 1
jbe@68 36 else
jbe@203 37 return 0
jbe@68 38 end
jbe@68 39 end
jbe@203 40 local function append_trailing_slash(str)
jbe@203 41 return string.sub(str, "([^/])$", function(last) return last .. "/" end)
jbe@203 42 end
jbe@203 43 WEBMCP_FRAMEWORK_PATH = append_trailing_slash(arg1)
jbe@203 44 WEBMCP_BASE_PATH = append_trailing_slash(arg2)
jbe@206 45 if WEBMCP_MODE == "listen" then
jbe@206 46 WEBMCP_APP_NAME = arg3
jbe@206 47 end
jbe@68 48 end
jbe@1 49
jbe@203 50 -- setup search paths for libraries
jbe/bsw@0 51 do
jbe@203 52 package.path = WEBMCP_FRAMEWORK_PATH .. "lib/?.lua;" .. package.path
jbe/bsw@0 53 -- find out which file name extension shared libraries have
jbe/bsw@0 54 local slib_exts = {}
jbe/bsw@0 55 for ext in string.gmatch(package.cpath, "%?%.([A-Za-z0-9_-]+)") do
jbe/bsw@0 56 slib_exts[ext] = true
jbe/bsw@0 57 end
jbe/bsw@0 58 local paths = {}
jbe/bsw@0 59 for ext in pairs(slib_exts) do
jbe@203 60 paths[#paths+1] = WEBMCP_FRAMEWORK_PATH .. "accelerator/?." .. ext
jbe/bsw@0 61 end
jbe/bsw@0 62 for ext in pairs(slib_exts) do
jbe@203 63 paths[#paths+1] = WEBMCP_FRAMEWORK_PATH .. "lib/?." .. ext
jbe/bsw@0 64 end
jbe/bsw@0 65 paths[#paths+1] = package.cpath
jbe/bsw@0 66 package.cpath = table.concat(paths, ";")
jbe/bsw@0 67 end
jbe/bsw@0 68
jbe@203 69 -- autoloader system for WebMCP environment "$WEBMCP_FRAMEWORK_PATH/env/",
jbe@203 70 -- application environment extensions "$WEBMCP_BASE_PATH/env/"
jbe@203 71 -- and models "$WEBMCP_BASE_PATH/model/"
jbe/bsw@0 72 do
jbe/bsw@0 73 local weakkey_mt = { __mode = "k" }
jbe/bsw@0 74 local autoloader_category = setmetatable({}, weakkey_mt)
jbe/bsw@0 75 local autoloader_path = setmetatable({}, weakkey_mt)
jbe/bsw@0 76 local autoloader_mt = {}
jbe/bsw@0 77 local function install_autoloader(self, category, path)
jbe/bsw@0 78 autoloader_category[self] = category
jbe/bsw@0 79 autoloader_path[self] = path
jbe/bsw@0 80 setmetatable(self, autoloader_mt)
jbe/bsw@0 81 end
jbe/bsw@0 82 local function try_exec(filename)
jbe/bsw@0 83 local file = io.open(filename, "r")
jbe/bsw@0 84 if file then
jbe/bsw@0 85 local filedata = file:read("*a")
jbe/bsw@0 86 io.close(file)
jbe@68 87 local func, errmsg = load(filedata, "=" .. filename)
jbe/bsw@0 88 if func then
jbe/bsw@0 89 func()
jbe/bsw@0 90 return true
jbe/bsw@0 91 else
jbe/bsw@0 92 error(errmsg, 0)
jbe/bsw@0 93 end
jbe/bsw@0 94 else
jbe/bsw@0 95 return false
jbe/bsw@0 96 end
jbe/bsw@0 97 end
jbe/bsw@0 98 local function compose_path_string(base, path, key)
jbe@203 99 if #path == 0 then
jbe@203 100 return base .. "/" .. key
jbe@203 101 else
jbe@203 102 return base .. table.concat(path, "/") .. "/" .. key
jbe@203 103 end
jbe/bsw@0 104 end
jbe/bsw@0 105 function autoloader_mt.__index(self, key)
jbe/bsw@0 106 local category, base_path, merge_base_path, file_key
jbe/bsw@0 107 local merge = false
jbe/bsw@0 108 if
jbe/bsw@0 109 string.find(key, "^[a-z_][A-Za-z0-9_]*$") and
jbe/bsw@0 110 not string.find(key, "^__")
jbe/bsw@0 111 then
jbe/bsw@0 112 category = "env"
jbe@203 113 base_path = WEBMCP_FRAMEWORK_PATH .. "env/"
jbe/bsw@0 114 merge = true
jbe@203 115 merge_base_path = WEBMCP_BASE_PATH .. "env/"
jbe/bsw@0 116 file_key = key
jbe/bsw@0 117 elseif string.find(key, "^[A-Z][A-Za-z0-9]*$") then
jbe/bsw@0 118 category = "model"
jbe@203 119 base_path = WEBMCP_BASE_PATH .. "model/"
jbe/bsw@0 120 local first = true
jbe/bsw@0 121 file_key = string.gsub(key, "[A-Z]",
jbe/bsw@0 122 function(c)
jbe/bsw@0 123 if first then
jbe/bsw@0 124 first = false
jbe/bsw@0 125 return string.lower(c)
jbe/bsw@0 126 else
jbe/bsw@0 127 return "_" .. string.lower(c)
jbe/bsw@0 128 end
jbe/bsw@0 129 end
jbe/bsw@0 130 )
jbe/bsw@0 131 else
jbe/bsw@0 132 return
jbe/bsw@0 133 end
jbe/bsw@0 134 local required_category = autoloader_category[self]
jbe/bsw@0 135 if required_category and required_category ~= category then return end
jbe/bsw@0 136 local path = autoloader_path[self]
jbe/bsw@0 137 local path_string = compose_path_string(base_path, path, file_key)
jbe/bsw@0 138 local merge_path_string
jbe/bsw@0 139 if merge then
jbe/bsw@0 140 merge_path_string = compose_path_string(
jbe/bsw@0 141 merge_base_path, path, file_key
jbe/bsw@0 142 )
jbe/bsw@0 143 end
jbe/bsw@0 144 local function try_dir(dirname)
jbe/bsw@0 145 local dir = io.open(dirname)
jbe/bsw@0 146 if dir then
jbe/bsw@0 147 io.close(dir)
jbe/bsw@0 148 local obj = {}
jbe/bsw@0 149 local sub_path = {}
jbe@203 150 for i = 1, #path do sub_path[i] = path[i] end
jbe@203 151 sub_path[#path+1] = file_key
jbe/bsw@0 152 install_autoloader(obj, category, sub_path)
jbe/bsw@0 153 rawset(self, key, obj)
jbe/bsw@0 154 try_exec(path_string .. "/__init.lua")
jbe/bsw@0 155 if merge then try_exec(merge_path_string .. "/__init.lua") end
jbe/bsw@0 156 return true
jbe/bsw@0 157 else
jbe/bsw@0 158 return false
jbe/bsw@0 159 end
jbe/bsw@0 160 end
jbe/bsw@0 161 if merge and try_exec(merge_path_string .. ".lua") then
jbe/bsw@0 162 elseif merge and try_dir(merge_path_string .. "/") then
jbe/bsw@0 163 elseif try_exec(path_string .. ".lua") then
jbe/bsw@0 164 elseif try_dir(path_string .. "/") then
jbe/bsw@0 165 else end
jbe/bsw@0 166 return rawget(self, key)
jbe/bsw@0 167 end
jbe/bsw@0 168 install_autoloader(_G, nil, {})
jbe@203 169 try_exec(WEBMCP_FRAMEWORK_PATH .. "env/__init.lua")
jbe@203 170 try_exec(WEBMCP_BASE_PATH .. "env/__init.lua")
jbe/bsw@0 171 end
jbe/bsw@0 172
jbe@214 173 -- replace Moonbridge listen function
jbe@214 174 local moonbridge_listen = listen
jbe@214 175 local listeners
jbe@214 176 function listen(args)
jbe@214 177 listeners[#listeners+1] = args
jbe@214 178 end
jbe@214 179
jbe@203 180 -- prohibit (unintended) definition of new global variables
jbe@203 181 _ENV = setmetatable({}, {
jbe@203 182 __index = _G,
jbe@203 183 __newindex = function()
jbe@203 184 error("Setting of global variable prohibited")
jbe@203 185 end
jbe@203 186 })
jbe@203 187
jbe@214 188 -- execute configurations
jbe@206 189 for i, config_name in ipairs(WEBMCP_CONFIG_NAMES) do
jbe@206 190 execute.config(config_name)
jbe@215 191 execute.prefork_initializers()
jbe@206 192 end
jbe@206 193
jbe/bsw@0 194 -- interactive console mode
jbe@203 195 if WEBMCP_MODE == "interactive" then
jbe@215 196 execute.postfork_initializers()
jbe@203 197 trace.disable() -- avoids memory leakage (TODO: needs general solution for moonbridge?)
jbe/bsw@0 198 end
jbe/bsw@0 199
jbe@204 200 -- invoke moonbridge
jbe@206 201 if WEBMCP_MODE == "listen" then
jbe@207 202 local http = require("moonbridge_http")
jbe@211 203 for i, listener in ipairs(listeners) do
jbe@215 204 listener.prepare = execute.postfork_initializers
jbe@211 205 listener.connect = http.generate_handler(
jbe@215 206 request.handler,
jbe@215 207 request.get_http_options()
jbe@211 208 )
jbe@211 209 listener.finish = execute.finalizers
jbe@211 210 moonbridge_listen(listener)
jbe@204 211 end
jbe@204 212 end
jbe@204 213

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