webmcp: eb3e236d261d framework/bin/mcp.lua

webmcp

view framework/bin/mcp.lua @ 206:eb3e236d261d

Code cleanup and work on Moonbridge integration

author	jbe
date	Fri Jan 09 22:28:39 2015 +0100 (2015-01-09)
parents	b059efd81649
children	77c4774e8342

line source

1 #!/usr/bin/env moonbridge

3 WEBMCP_VERSION = "2.0.0_devel"

5 -- check if interactive mode

6 if listen then -- defined by moonbridge

7 WEBMCP_MODE = "listen"

8 else

9 WEBMCP_MODE = "interactive"

10 end

12 -- configuration names are provided as 4th, 5th, etc. argument

13 WEBMCP_CONFIG_NAMES = {select(4, ...)}

15 -- determine framework and bath path from command line arguments

16 -- or print usage synopsis (if applicable)

17 do

18 local arg1, arg2, arg3 = ...

19 local helpout

20 if

21 arg1 == "-h" or arg1 == "--help" or

22 arg2 == "-h" or arg2 == "--help" -- if first arg is provided by wrapper

23 then

24 helpout = io.stdout

25 elseif

26 #config_args < 1 or

27 (WEBMCP_MODE == "interactive") ~= (arg3 == "INTERACTIVE")

28 then

29 helpout = io.stderr

30 end

31 helpout:write("Usage: moonbridge -- <framework path>/bin/mcp.lua <framework path> <app base path> <app name> <config name> [<config name> ...]\n")

32 helpout:write(" or: lua -i <framework path>/bin/mcp.lua <framework path> <app base path> INTERACTIVE <config name> [<config name> ...]\n")

33 if helpout then

34 if helpout == io.stderr then

35 return 1

36 else

37 return 0

38 end

39 end

40 local function append_trailing_slash(str)

41 return string.sub(str, "([^/])$", function(last) return last .. "/" end)

42 end

43 WEBMCP_FRAMEWORK_PATH = append_trailing_slash(arg1)

44 WEBMCP_BASE_PATH = append_trailing_slash(arg2)

45 if WEBMCP_MODE == "listen" then

46 WEBMCP_APP_NAME = arg3

47 end

48 end

50 -- setup search paths for libraries

51 do

52 package.path = WEBMCP_FRAMEWORK_PATH .. "lib/?.lua;" .. package.path

53 -- find out which file name extension shared libraries have

54 local slib_exts = {}

55 for ext in string.gmatch(package.cpath, "%?%.([A-Za-z0-9_-]+)") do

56 slib_exts[ext] = true

57 end

58 local paths = {}

59 for ext in pairs(slib_exts) do

60 paths[#paths+1] = WEBMCP_FRAMEWORK_PATH .. "accelerator/?." .. ext

61 end

62 for ext in pairs(slib_exts) do

63 paths[#paths+1] = WEBMCP_FRAMEWORK_PATH .. "lib/?." .. ext

64 end

65 paths[#paths+1] = package.cpath

66 package.cpath = table.concat(paths, ";")

67 end

69 -- autoloader system for WebMCP environment "$WEBMCP_FRAMEWORK_PATH/env/",

70 -- application environment extensions "$WEBMCP_BASE_PATH/env/"

71 -- and models "$WEBMCP_BASE_PATH/model/"

72 do

73 local weakkey_mt = { __mode = "k" }

74 local autoloader_category = setmetatable({}, weakkey_mt)

75 local autoloader_path = setmetatable({}, weakkey_mt)

76 local autoloader_mt = {}

77 local function install_autoloader(self, category, path)

78 autoloader_category[self] = category

79 autoloader_path[self] = path

80 setmetatable(self, autoloader_mt)

81 end

82 local function try_exec(filename)

83 local file = io.open(filename, "r")

84 if file then

85 local filedata = file:read("*a")

86 io.close(file)

87 local func, errmsg = load(filedata, "=" .. filename)

88 if func then

89 func()

90 return true

91 else

92 error(errmsg, 0)

93 end

94 else

95 return false

96 end

97 end

98 local function compose_path_string(base, path, key)

99 if #path == 0 then

100 return base .. "/" .. key

101 else

102 return base .. table.concat(path, "/") .. "/" .. key

103 end

104 end

105 function autoloader_mt.__index(self, key)

106 local category, base_path, merge_base_path, file_key

107 local merge = false

108 if

109 string.find(key, "^[a-z_][A-Za-z0-9_]*$") and

110 not string.find(key, "^__")

111 then

112 category = "env"

113 base_path = WEBMCP_FRAMEWORK_PATH .. "env/"

114 merge = true

115 merge_base_path = WEBMCP_BASE_PATH .. "env/"

116 file_key = key

117 elseif string.find(key, "^[A-Z][A-Za-z0-9]*$") then

118 category = "model"

119 base_path = WEBMCP_BASE_PATH .. "model/"

120 local first = true

121 file_key = string.gsub(key, "[A-Z]",

122 function(c)

123 if first then

124 first = false

125 return string.lower(c)

126 else

127 return "_" .. string.lower(c)

128 end

129 end

130 )

131 else

132 return

133 end

134 local required_category = autoloader_category[self]

135 if required_category and required_category ~= category then return end

136 local path = autoloader_path[self]

137 local path_string = compose_path_string(base_path, path, file_key)

138 local merge_path_string

139 if merge then

140 merge_path_string = compose_path_string(

141 merge_base_path, path, file_key

142 )

143 end

144 local function try_dir(dirname)

145 local dir = io.open(dirname)

146 if dir then

147 io.close(dir)

148 local obj = {}

149 local sub_path = {}

150 for i = 1, #path do sub_path[i] = path[i] end

151 sub_path[#path+1] = file_key

152 install_autoloader(obj, category, sub_path)

153 rawset(self, key, obj)

154 try_exec(path_string .. "/__init.lua")

155 if merge then try_exec(merge_path_string .. "/__init.lua") end

156 return true

157 else

158 return false

159 end

160 end

161 if merge and try_exec(merge_path_string .. ".lua") then

162 elseif merge and try_dir(merge_path_string .. "/") then

163 elseif try_exec(path_string .. ".lua") then

164 elseif try_dir(path_string .. "/") then

165 else end

166 return rawget(self, key)

167 end

168 install_autoloader(_G, nil, {})

169 try_exec(WEBMCP_FRAMEWORK_PATH .. "env/__init.lua")

170 try_exec(WEBMCP_BASE_PATH .. "env/__init.lua")

171 end

172

173 -- prohibit (unintended) definition of new global variables

174 _ENV = setmetatable({}, {

175 __index = _G,

176 __newindex = function()

177 error("Setting of global variable prohibited")

178 end

179 })

180

181 -- execute configurations

182 for i, config_name in ipairs(WEBMCP_CONFIG_NAMES) do

183 execute.config(config_name)

184 end

185

186 -- interactive console mode

187 if WEBMCP_MODE == "interactive" then

188 trace.disable() -- avoids memory leakage (TODO: needs general solution for moonbridge?)

189 end

190

191 -- invoke moonbridge

192 if WEBMCP_MODE == "listen" then

193 local moonbridge_listen = listen

194 local listeners

195 function _G.listen(args)

196 listeners[#listeners+1] = args

197 end

198 for i = 1, #extraargs/2 do

199 local config = {}

200 listeners = {}

201 execute.config(config_name)

202 for i, listener in ipairs(listeners) do

203 listener.prepare = execute.prefork_initializers

204 listener.connect = http.generate_handler(

205 request.get_http_options(),

206 function(req)

207 execute.postfork_initializers()

208 request.handler(req)

209 end

210 )

211 --listener.finish = ??? -- TODO: requires coroutines and execute.inner() for initializers?

212 moonbridge_listen(listener)

213 end

214 end

215 end

216

217 --[[ TODO: following lines to be moved to execute.server(...)

218

219 local success, error_info = xpcall(

220 function()

221

222 -- execute configuration file

223 do

224 local config_name = request.get_config_name()

225 if config_name then

226 execute.config(config_name)

227 end

228 end

229

230 -- restore slots if coming from http redirect

231 if cgi.params.tempstore then

232 trace.restore_slots{}

233 local blob = tempstore.pop(cgi.params.tempstore)

234 if blob then slot.restore_all(blob) end

235 end

236

237 local function file_exists(filename)

238 local file = io.open(filename, "r")

239 if file then

240 io.close(file)

241 return true

242 else

243 return false

244 end

245 end

246

247 if request.is_404() then

248 request.set_status("404 Not Found")

249 if request.get_404_route() then

250 request.forward(request.get_404_route())

251 else

252 error("No 404 page set.")

253 end

254 elseif request.get_action() then

255 trace.request{

256 module = request.get_module(),

257 action = request.get_action()

258 }

259 if

260 request.get_404_route() and

261 not file_exists(

262 encode.action_file_path{

263 module = request.get_module(),

264 action = request.get_action()

265 }

266 )

267 then

268 request.set_status("404 Not Found")

269 request.forward(request.get_404_route())

270 else

271 if cgi.method ~= "POST" then

272 request.set_status("405 Method Not Allowed")

273 cgi.add_header("Allow: POST")

274 error("Tried to invoke an action with a GET request.")

275 end

276 local action_status = execute.filtered_action{

277 module = request.get_module(),

278 action = request.get_action(),

279 }

280 if not request.is_rerouted() then

281 local routing_mode, routing_module, routing_view

282 routing_mode = cgi.params["_webmcp_routing." .. action_status .. ".mode"]

283 routing_module = cgi.params["_webmcp_routing." .. action_status .. ".module"]

284 routing_view = cgi.params["_webmcp_routing." .. action_status .. ".view"]

285 routing_anchor = cgi.params["_webmcp_routing." .. action_status .. ".anchor"]

286 if not (routing_mode or routing_module or routing_view) then

287 action_status = "default"

288 routing_mode = cgi.params["_webmcp_routing.default.mode"]

289 routing_module = cgi.params["_webmcp_routing.default.module"]

290 routing_view = cgi.params["_webmcp_routing.default.view"]

291 routing_anchor = cgi.params["_webmcp_routing.default.anchor"]

292 end

293 assert(routing_module, "Routing information has no module.")

294 assert(routing_view, "Routing information has no view.")

295 if routing_mode == "redirect" then

296 local routing_params = {}

297 for key, value in pairs(cgi.params) do

298 local status, stripped_key = string.match(

299 key, "^_webmcp_routing%.([^%.]*)%.params%.(.*)$"

300 )

301 if status == action_status then

302 routing_params[stripped_key] = value

303 end

304 end

305 request.redirect{

306 module = routing_module,

307 view = routing_view,

308 id = cgi.params["_webmcp_routing." .. action_status .. ".id"],

309 params = routing_params,

310 anchor = routing_anchor

311 }

312 elseif routing_mode == "forward" then

313 request.forward{ module = routing_module, view = routing_view }

314 else

315 error("Missing or unknown routing mode in request parameters.")

316 end

317 end

318 end

319 else

320 -- no action

321 trace.request{

322 module = request.get_module(),

323 view = request.get_view()

324 }

325 if

326 request.get_404_route() and

327 not file_exists(

328 encode.view_file_path{

329 module = request.get_module(),

330 view = request.get_view()

331 }

332 )

333 then

334 request.set_status("404 Not Found")

335 request.forward(request.get_404_route())

336 end

337 end

338

339 if not request.get_redirect_data() then

340 request.process_forward()

341 local view = request.get_view()

342 if string.find(view, "^_") then

343 error("Tried to call a private view (prefixed with underscore).")

344 end

345 execute.filtered_view{

346 module = request.get_module(),

347 view = view,

348 }

349 end

350

351 -- force error due to missing absolute base URL until its too late to display error message

352 --if request.get_redirect_data() then

353 -- request.get_absolute_baseurl()

354 --end

355

356 end,

357

358 function(errobj)

359 return {

360 errobj = errobj,

361 stacktrace = string.gsub(

362 debug.traceback('', 2),

363 "^\r?\n?stack traceback:\r?\n?", ""

364 )

365 }

366 end

367 )

368

369 if not success then trace.error{} end

370

371 -- laufzeitermittlung

372 trace.exectime{ real = extos.monotonic_hires_time(), cpu = os.clock() }

373

374 slot.select('trace', trace.render) -- render trace information

375

376 local redirect_data = request.get_redirect_data()

377

378 -- log error and switch to error layout, unless success

379 if not success then

380 local errobj = error_info.errobj

381 local stacktrace = error_info.stacktrace

382 if not request.get_status() and not request.get_json_request_slots() then

383 request.set_status("500 Internal Server Error")

384 end

385 slot.set_layout('system_error')

386 slot.select('system_error', function()

387 if getmetatable(errobj) == mondelefant.errorobject_metatable then

388 slot.put(

389 "Database error of class ",

390 encode.html(errobj.code),

391 " occured: ",

392 encode.html(errobj.message),

393 ""

394 )

395 else

396 slot.put("", encode.html(tostring(errobj)), "")

397 end

398 slot.put("Stack trace follows: ")

399 slot.put(encode.html_newlines(encode.html(stacktrace)))

400 slot.put("")

401 end)

402 elseif redirect_data then

403 local redirect_params = {}

404 for key, value in pairs(redirect_data.params) do

405 redirect_params[key] = value

406 end

407 local slot_dump = slot.dump_all()

408 if slot_dump ~= "" then

409 redirect_params.tempstore = tempstore.save(slot_dump)

410 end

411 local json_request_slots = request.get_json_request_slots()

412 if json_request_slots then

413 redirect_params["_webmcp_json_slots[]"] = json_request_slots

414 end

415 cgi.redirect(

416 encode.url{

417 base = request.get_absolute_baseurl(),

418 module = redirect_data.module,

419 view = redirect_data.view,

420 id = redirect_data.id,

421 params = redirect_params,

422 anchor = redirect_data.anchor

423 }

424 )

425 cgi.send_data()

426 end

427

428 if not success or not redirect_data then

429

430 local http_status = request.get_status()

431 if http_status then

432 cgi.set_status(http_status)

433 end

434

435 local json_request_slots = request.get_json_request_slots()

436 if json_request_slots then

437 cgi.set_content_type('application/json')

438 local data = {}

439 for idx, slot_ident in ipairs(json_request_slots) do

440 data[slot_ident] = slot.get_content(slot_ident)

441 end

442 cgi.send_data(encode.json(data))

443 else

444 cgi.set_content_type(slot.get_content_type())

445 cgi.send_data(slot.render_layout())

446 end

447 end

448

449 --]]

450