webmcp: 31f775ea5e24 framework/cgi-bin/webmcp.lua

webmcp

view framework/cgi-bin/webmcp.lua @ 195:31f775ea5e24

Fix in JSON documentation

author	jbe
date	Mon Aug 11 17:41:40 2014 +0200 (2014-08-11)
parents	8d7665e0d490
children

line source

1 #!/usr/bin/env lua

3 _WEBMCP_VERSION = "1.2.6"

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 do

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

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

63 cgi = nil

64 else

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

66 cgi = rocketcgi

67 end

68 end

70 -- load database access library with object relational mapper

71 mondelefant = require 'mondelefant'

72 mondelefant.connection_prototype.error_objects = true

74 -- load type system "atom"

75 atom = require 'atom'

77 -- load JSON library

78 json = require 'json'

80 -- load mondelefant atom connector

81 require 'mondelefant_atom_connector'

83 --[[--

84 cloned_table = -- newly generated table

85 table.new(

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

87 )

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

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

92 --]]--

93 function table.new(tbl)

94 new_tbl = {}

95 if tbl then

96 for key, value in pairs(tbl) do

97 new_tbl[key] = value

98 end

99 end

100 return new_tbl

101 end

102 --//--

103

104 --[[--

105 at_exit(

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

107 )

108

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

110 --]]--

111 do

112 local exit_handlers = {}

113 function at_exit(func)

114 table.insert(exit_handlers, func)

115 end

116 function exit(code)

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

118 exit_handlers[i]()

119 end

120 os.exit(code)

121 end

122 end

123 --//--

124

125 --[[--

126 app -- table to store an application state

127

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

129 --]]--

130 app = {}

131 --//--

132

133 --[[--

134 config -- table to store application configuration

135

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

137 --]]--

138 config = {}

139 --//--

140

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

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

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

144 do

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

146 if not app_base then

147 error(

148 "Failed to initialize autoloader " ..

149 "due to unset WEBMCP_APP_BASEPATH environment variable."

150 )

151 end

152 local weakkey_mt = { __mode = "k" }

153 local autoloader_category = setmetatable({}, weakkey_mt)

154 local autoloader_path = setmetatable({}, weakkey_mt)

155 local autoloader_mt = {}

156 local function install_autoloader(self, category, path)

157 autoloader_category[self] = category

158 autoloader_path[self] = path

159 setmetatable(self, autoloader_mt)

160 end

161 local function try_exec(filename)

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

163 if file then

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

165 io.close(file)

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

167 if func then

168 func()

169 return true

170 else

171 error(errmsg, 0)

172 end

173 else

174 return false

175 end

176 end

177 local function compose_path_string(base, path, key)

178 return string.gsub(

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

180 )

181 end

182 function autoloader_mt.__index(self, key)

183 local category, base_path, merge_base_path, file_key

184 local merge = false

185 if

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

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

188 then

189 category = "env"

190 base_path = WEBMCP_PATH .. "/env/"

191 merge = true

192 merge_base_path = app_base .. "/env/"

193 file_key = key

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

195 category = "model"

196 base_path = app_base .. "/model/"

197 local first = true

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

199 function(c)

200 if first then

201 first = false

202 return string.lower(c)

203 else

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

205 end

206 end

207 )

208 else

209 return

210 end

211 local required_category = autoloader_category[self]

212 if required_category and required_category ~= category then return end

213 local path = autoloader_path[self]

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

215 local merge_path_string

216 if merge then

217 merge_path_string = compose_path_string(

218 merge_base_path, path, file_key

219 )

220 end

221 local function try_dir(dirname)

222 local dir = io.open(dirname)

223 if dir then

224 io.close(dir)

225 local obj = {}

226 local sub_path = {}

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

228 table.insert(sub_path, file_key)

229 install_autoloader(obj, category, sub_path)

230 rawset(self, key, obj)

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

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

233 return true

234 else

235 return false

236 end

237 end

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

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

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

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

242 else end

243 return rawget(self, key)

244 end

245 install_autoloader(_G, nil, {})

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

247 end

248

249 -- interactive console mode

250 if not cgi then

251 trace.disable() -- avoids memory leakage

252 local config_name = request.get_config_name()

253 if config_name then

254 execute.config(config_name)

255 end

256 return

257 end

258

259 local success, error_info = xpcall(

260 function()

261

262 -- execute configuration file

263 do

264 local config_name = request.get_config_name()

265 if config_name then

266 execute.config(config_name)

267 end

268 end

269

270 -- restore slots if coming from http redirect

271 if cgi.params.tempstore then

272 trace.restore_slots{}

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

274 if blob then slot.restore_all(blob) end

275 end

276

277 local function file_exists(filename)

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

279 if file then

280 io.close(file)

281 return true

282 else

283 return false

284 end

285 end

286

287 if request.is_404() then

288 request.set_status("404 Not Found")

289 if request.get_404_route() then

290 request.forward(request.get_404_route())

291 else

292 error("No 404 page set.")

293 end

294 elseif request.get_action() then

295 trace.request{

296 module = request.get_module(),

297 action = request.get_action()

298 }

299 if

300 request.get_404_route() and

301 not file_exists(

302 encode.action_file_path{

303 module = request.get_module(),

304 action = request.get_action()

305 }

306 )

307 then

308 request.set_status("404 Not Found")

309 request.forward(request.get_404_route())

310 else

311 if cgi.method ~= "POST" then

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

313 cgi.add_header("Allow: POST")

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

315 end

316 local action_status = execute.filtered_action{

317 module = request.get_module(),

318 action = request.get_action(),

319 }

320 if not request.is_rerouted() then

321 local routing_mode, routing_module, routing_view

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

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

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

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

326 if not (routing_mode or routing_module or routing_view) then

327 action_status = "default"

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

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

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

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

332 end

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

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

335 if routing_mode == "redirect" then

336 local routing_params = {}

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

338 local status, stripped_key = string.match(

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

340 )

341 if status == action_status then

342 routing_params[stripped_key] = value

343 end

344 end

345 request.redirect{

346 module = routing_module,

347 view = routing_view,

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

349 params = routing_params,

350 anchor = routing_anchor

351 }

352 elseif routing_mode == "forward" then

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

354 else

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

356 end

357 end

358 end

359 else

360 -- no action

361 trace.request{

362 module = request.get_module(),

363 view = request.get_view()

364 }

365 if

366 request.get_404_route() and

367 not file_exists(

368 encode.view_file_path{

369 module = request.get_module(),

370 view = request.get_view()

371 }

372 )

373 then

374 request.set_status("404 Not Found")

375 request.forward(request.get_404_route())

376 end

377 end

378

379 if not request.get_redirect_data() then

380 request.process_forward()

381 local view = request.get_view()

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

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

384 end

385 execute.filtered_view{

386 module = request.get_module(),

387 view = view,

388 }

389 end

390

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

392 --if request.get_redirect_data() then

393 -- request.get_absolute_baseurl()

394 --end

395

396 end,

397

398 function(errobj)

399 return {

400 errobj = errobj,

401 stacktrace = string.gsub(

402 debug.traceback('', 2),

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

404 )

405 }

406 end

407 )

408

409 if not success then trace.error{} end

410

411 -- laufzeitermittlung

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

413

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

415

416 local redirect_data = request.get_redirect_data()

417

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

419 if not success then

420 local errobj = error_info.errobj

421 local stacktrace = error_info.stacktrace

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

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

424 end

425 slot.set_layout('system_error')

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

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

428 slot.put(

429 "Database error of class ",

430 encode.html(errobj.code),

431 " occured: ",

432 encode.html(errobj.message),

433 ""

434 )

435 else

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

437 end

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

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

440 slot.put("")

441 end)

442 elseif redirect_data then

443 local redirect_params = {}

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

445 redirect_params[key] = value

446 end

447 local slot_dump = slot.dump_all()

448 if slot_dump ~= "" then

449 redirect_params.tempstore = tempstore.save(slot_dump)

450 end

451 local json_request_slots = request.get_json_request_slots()

452 if json_request_slots then

453 redirect_params["_webmcp_json_slots[]"] = json_request_slots

454 end

455 cgi.redirect(

456 encode.url{

457 base = request.get_absolute_baseurl(),

458 module = redirect_data.module,

459 view = redirect_data.view,

460 id = redirect_data.id,

461 params = redirect_params,

462 anchor = redirect_data.anchor

463 }

464 )

465 cgi.send_data()

466 end

467

468 if not success or not redirect_data then

469

470 local http_status = request.get_status()

471 if http_status then

472 cgi.set_status(http_status)

473 end

474

475 local json_request_slots = request.get_json_request_slots()

476 if json_request_slots then

477 cgi.set_content_type('application/json')

478 local data = {}

479 for idx, slot_ident in ipairs(json_request_slots) do

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

481 end

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

483 else

484 cgi.set_content_type(slot.get_content_type())

485 cgi.send_data(slot.render_layout())

486 end

487 end

488

489 exit()