webmcp: 79bf3deefe21 framework/cgi-bin/webmcp.lua

webmcp

view framework/cgi-bin/webmcp.lua @ 85:79bf3deefe21

Disable trace system for interactive (non-cgi) sessions

author	jbe
date	Tue Jul 03 23:33:17 2012 +0200 (2012-07-03)
parents	6ab448e71d66
children	ed22ba3a2888

line source

1 #!/usr/bin/env lua

3 _WEBMCP_VERSION = "1.2.3"

5 -- Lua 5.1 compatibility

6 if not table.unpack then

7 table.unpack = unpack

8 end

9 do

10 local old_load = load

11 function load(ld, ...)

12 if type(ld) == "string" then

13 local done = false

14 local func = function()

15 if not done then

16 done = true

17 return ld

18 end

19 end

20 return old_load(func, ...)

21 else

22 return old_load(ld, ...)

23 end

24 end

25 end

27 -- include "../lib/" in search path for libraries

28 if not WEBMCP_PATH then

29 WEBMCP_PATH = "../"

30 end

31 do

32 package.path = WEBMCP_PATH .. 'lib/?.lua;' .. package.path

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

34 local slib_exts = {}

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

36 slib_exts[ext] = true

37 end

38 local paths = {}

39 for ext in pairs(slib_exts) do

40 paths[#paths+1] = WEBMCP_PATH .. "accelerator/?." .. ext

41 end

42 for ext in pairs(slib_exts) do

43 paths[#paths+1] = WEBMCP_PATH .. "lib/?." .. ext

44 end

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

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

47 end

49 -- load os extensions for lua

50 -- (should happen as soon as possible due to run time measurement)

51 extos = require 'extos'

53 -- load nihil library

54 nihil = require 'nihil'

56 -- load random generator library

57 multirand = require 'multirand'

59 -- load rocketcgi library and map it to cgi, unless interactive,

60 -- and disable trace system, if interactive (avoids memory leakage)

61 do

62 local option = os.getenv("WEBMCP_INTERACTIVE")

63 if option and option ~= "" and option ~= "0" then

64 cgi = nil

65 trace.disable()

66 else

67 rocketcgi = require 'rocketcgi' -- TODO: no "rocketcgi" alias

68 cgi = rocketcgi

69 end

70 end

72 -- load database access library with object relational mapper

73 mondelefant = require 'mondelefant'

74 mondelefant.connection_prototype.error_objects = true

76 -- load type system "atom"

77 atom = require 'atom'

79 -- load mondelefant atom connector

80 require 'mondelefant_atom_connector'

82 --[[--

83 cloned_table = -- newly generated table

84 table.new(

85 table_or_nil -- keys of a given table will be copied to the new table

86 )

88 If a table is given, then a cloned table is returned.

89 If nil is given, then a new empty table is returned.

91 --]]--

92 function table.new(tbl)

93 new_tbl = {}

94 if tbl then

95 for key, value in pairs(tbl) do

96 new_tbl[key] = value

97 end

98 end

99 return new_tbl

100 end

101 --//--

102

103 --[[--

104 at_exit(

105 func -- function to be called before the process is ending

106 )

107

108 Registers a function to be called before the CGI process is exiting.

109 --]]--

110 do

111 local exit_handlers = {}

112 function at_exit(func)

113 table.insert(exit_handlers, func)

114 end

115 function exit(code)

116 for i = #exit_handlers, 1, -1 do

117 exit_handlers[i]()

118 end

119 os.exit(code)

120 end

121 end

122 --//--

123

124 --[[--

125 app -- table to store an application state

126

127 'app' is a global table for storing any application state data

128 --]]--

129 app = {}

130 --//--

131

132 --[[--

133 config -- table to store application configuration

134

135 'config' is a global table, which can be modified by a config file of an application to modify the behaviour of that application.

136 --]]--

137 config = {}

138 --//--

139

140 -- autoloader system for WebMCP environment "../env/",

141 -- application environment extensions "$WEBMCP_APP_BASE/env/"

142 -- and models "$WEBMCP_APP_BASE/model/"

143 do

144 local app_base = os.getenv("WEBMCP_APP_BASEPATH")

145 if not app_base then

146 error(

147 "Failed to initialize autoloader " ..

148 "due to unset WEBMCP_APP_BASEPATH environment variable."

149 )

150 end

151 local weakkey_mt = { __mode = "k" }

152 local autoloader_category = setmetatable({}, weakkey_mt)

153 local autoloader_path = setmetatable({}, weakkey_mt)

154 local autoloader_mt = {}

155 local function install_autoloader(self, category, path)

156 autoloader_category[self] = category

157 autoloader_path[self] = path

158 setmetatable(self, autoloader_mt)

159 end

160 local function try_exec(filename)

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

162 if file then

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

164 io.close(file)

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

166 if func then

167 func()

168 return true

169 else

170 error(errmsg, 0)

171 end

172 else

173 return false

174 end

175 end

176 local function compose_path_string(base, path, key)

177 return string.gsub(

178 base .. table.concat(path, "/") .. "/" .. key, "/+", "/"

179 )

180 end

181 function autoloader_mt.__index(self, key)

182 local category, base_path, merge_base_path, file_key

183 local merge = false

184 if

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

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

187 then

188 category = "env"

189 base_path = WEBMCP_PATH .. "/env/"

190 merge = true

191 merge_base_path = app_base .. "/env/"

192 file_key = key

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

194 category = "model"

195 base_path = app_base .. "/model/"

196 local first = true

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

198 function(c)

199 if first then

200 first = false

201 return string.lower(c)

202 else

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

204 end

205 end

206 )

207 else

208 return

209 end

210 local required_category = autoloader_category[self]

211 if required_category and required_category ~= category then return end

212 local path = autoloader_path[self]

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

214 local merge_path_string

215 if merge then

216 merge_path_string = compose_path_string(

217 merge_base_path, path, file_key

218 )

219 end

220 local function try_dir(dirname)

221 local dir = io.open(dirname)

222 if dir then

223 io.close(dir)

224 local obj = {}

225 local sub_path = {}

226 for i, v in ipairs(path) do sub_path[i] = v end

227 table.insert(sub_path, file_key)

228 install_autoloader(obj, category, sub_path)

229 rawset(self, key, obj)

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

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

232 return true

233 else

234 return false

235 end

236 end

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

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

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

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

241 else end

242 return rawget(self, key)

243 end

244 install_autoloader(_G, nil, {})

245 try_exec(WEBMCP_PATH .. "env/__init.lua")

246 end

247

248 -- interactive console mode

249 if not cgi then

250 local config_name = request.get_config_name()

251 if config_name then

252 execute.config(config_name)

253 end

254 return

255 end

256

257 local success, error_info = xpcall(

258 function()

259

260 -- execute configuration file

261 do

262 local config_name = request.get_config_name()

263 if config_name then

264 execute.config(config_name)

265 end

266 end

267

268 -- restore slots if coming from http redirect

269 if cgi.params.tempstore then

270 trace.restore_slots{}

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

272 if blob then slot.restore_all(blob) end

273 end

274

275 local function file_exists(filename)

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

277 if file then

278 io.close(file)

279 return true

280 else

281 return false

282 end

283 end

284

285 if cgi.params["_webmcp_404"] then

286 request.force_absolute_baseurl()

287 request.set_status("404 Not Found")

288 if request.get_404_route() then

289 request.forward(request.get_404_route())

290 else

291 error("No 404 page set.")

292 end

293 elseif request.get_action() then

294 trace.request{

295 module = request.get_module(),

296 action = request.get_action()

297 }

298 if

299 request.get_404_route() and

300 not file_exists(

301 encode.action_file_path{

302 module = request.get_module(),

303 action = request.get_action()

304 }

305 )

306 then

307 request.set_status("404 Not Found")

308 request.forward(request.get_404_route())

309 else

310 if cgi.method ~= "POST" then

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

312 cgi.add_header("Allow: POST")

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

314 end

315 local action_status = execute.filtered_action{

316 module = request.get_module(),

317 action = request.get_action(),

318 }

319 if not request.is_rerouted() then

320 local routing_mode, routing_module, routing_view

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

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

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

324 if not (routing_mode or routing_module or routing_view) then

325 action_status = "default"

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

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

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

329 end

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

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

332 if routing_mode == "redirect" then

333 local routing_params = {}

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

335 local status, stripped_key = string.match(

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

337 )

338 if status == action_status then

339 routing_params[stripped_key] = value

340 end

341 end

342 request.redirect{

343 module = routing_module,

344 view = routing_view,

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

346 params = routing_params

347 }

348 elseif routing_mode == "forward" then

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

350 else

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

352 end

353 end

354 end

355 else

356 -- no action

357 trace.request{

358 module = request.get_module(),

359 view = request.get_view()

360 }

361 if

362 request.get_404_route() and

363 not file_exists(

364 encode.view_file_path{

365 module = request.get_module(),

366 view = request.get_view()

367 }

368 )

369 then

370 request.set_status("404 Not Found")

371 request.forward(request.get_404_route())

372 end

373 end

374

375 if not request.get_redirect_data() then

376 request.process_forward()

377 local view = request.get_view()

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

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

380 end

381 execute.filtered_view{

382 module = request.get_module(),

383 view = view,

384 }

385 end

386

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

388 --if request.get_redirect_data() then

389 -- request.get_absolute_baseurl()

390 --end

391

392 end,

393

394 function(errobj)

395 return {

396 errobj = errobj,

397 stacktrace = string.gsub(

398 debug.traceback('', 2),

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

400 )

401 }

402 end

403 )

404

405 if not success then trace.error{} end

406

407 -- laufzeitermittlung

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

409

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

411

412 local redirect_data = request.get_redirect_data()

413

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

415 if not success then

416 local errobj = error_info.errobj

417 local stacktrace = error_info.stacktrace

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

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

420 end

421 slot.set_layout('system_error')

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

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

424 slot.put(

425 "Database error of class ",

426 encode.html(errobj.code),

427 " occured: ",

428 encode.html(errobj.message),

429 ""

430 )

431 else

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

433 end

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

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

436 slot.put("")

437 end)

438 elseif redirect_data then

439 local redirect_params = {}

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

441 redirect_params[key] = value

442 end

443 local slot_dump = slot.dump_all()

444 if slot_dump ~= "" then

445 redirect_params.tempstore = tempstore.save(slot_dump)

446 end

447 local json_request_slots = request.get_json_request_slots()

448 if json_request_slots then

449 redirect_params["_webmcp_json_slots[]"] = json_request_slots

450 end

451 cgi.redirect(

452 encode.url{

453 base = request.get_absolute_baseurl(),

454 module = redirect_data.module,

455 view = redirect_data.view,

456 id = redirect_data.id,

457 params = redirect_params

458 }

459 )

460 cgi.send_data()

461 end

462

463 if not success or not redirect_data then

464

465 local http_status = request.get_status()

466 if http_status then

467 cgi.set_status(http_status)

468 end

469

470 local json_request_slots = request.get_json_request_slots()

471 if json_request_slots then

472 cgi.set_content_type('application/json')

473 local data = {}

474 for idx, slot_ident in ipairs(json_request_slots) do

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

476 end

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

478 else

479 cgi.set_content_type(slot.get_content_type())

480 cgi.send_data(slot.render_layout())

481 end

482 end

483

484 exit()