webmcp: 985024b16520 framework/cgi-bin/webmcp.lua

webmcp

view framework/cgi-bin/webmcp.lua @ 1:985024b16520

Version 1.0.1

New feature: JSON requests

Changes in ui.paginate: Current page setting is directly fetched from CGI params, instead of view params

Changed behavior of load methods of atom library to accept nil as input

Bugfixes in mondelefant_atom_connector timestamp(tz) loaders

Added global constant _WEBMCP_VERSION containing a version string

author	jbe
date	Tue Nov 17 12:00:00 2009 +0100 (2009-11-17)
parents	9fdfb27f8e67
children	72860d232f32

line source

1 #!/usr/bin/env lua

3 _WEBMCP_VERSION = "1.0.1"

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

6 do

7 package.path = '../lib/?.lua;' .. package.path

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

9 local slib_exts = {}

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

11 slib_exts[ext] = true

12 end

13 local paths = {}

14 for ext in pairs(slib_exts) do

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

16 end

17 for ext in pairs(slib_exts) do

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

19 end

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

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

22 end

24 -- load os extensions for lua

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

26 require 'extos'

28 -- load nihil library

29 require 'nihil'

31 -- load random generator library

32 require 'multirand'

34 -- load rocketcgi library and map it to cgi

35 do

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

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

38 cgi = nil

39 else

40 require 'rocketcgi'

41 cgi = rocketcgi

42 end

43 end

45 -- load database access library with object relational mapper

46 require 'mondelefant'

47 mondelefant.connection_prototype.error_objects = true

49 -- load type system "atom"

50 require 'atom'

52 -- load mondelefant atom connector

53 require 'mondelefant_atom_connector'

55 --[[--

56 cloned_table = -- newly generated table

57 table.new(

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

59 )

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

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

64 --]]--

65 function table.new(tbl)

66 new_tbl = {}

67 if tbl then

68 for key, value in pairs(tbl) do

69 new_tbl[key] = value

70 end

71 end

72 return new_tbl

73 end

74 --//--

76 --[[--

77 at_exit(

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

79 )

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

82 --]]--

83 do

84 local exit_handlers = {}

85 function at_exit(func)

86 table.insert(exit_handlers, func)

87 end

88 function exit(code)

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

90 exit_handlers[i]()

91 end

92 os.exit(code)

93 end

94 end

95 --//--

97 --[[--

98 app -- table to store an application state

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

101 --]]--

102 app = {}

103 --//--

104

105 --[[--

106 config -- table to store application configuration

107

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

109 --]]--

110 config = {}

111 --//--

112

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

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

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

116 do

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

118 if not app_base then

119 error(

120 "Failed to initialize autoloader " ..

121 "due to unset WEBMCP_APP_BASEPATH environment variable."

122 )

123 end

124 local weakkey_mt = { __mode = "k" }

125 local autoloader_category = setmetatable({}, weakkey_mt)

126 local autoloader_path = setmetatable({}, weakkey_mt)

127 local autoloader_mt = {}

128 local function install_autoloader(self, category, path)

129 autoloader_category[self] = category

130 autoloader_path[self] = path

131 setmetatable(self, autoloader_mt)

132 end

133 local function try_exec(filename)

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

135 if file then

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

137 io.close(file)

138 local func, errmsg = loadstring(filedata, "=" .. filename)

139 if func then

140 func()

141 return true

142 else

143 error(errmsg, 0)

144 end

145 else

146 return false

147 end

148 end

149 local function compose_path_string(base, path, key)

150 return string.gsub(

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

152 )

153 end

154 function autoloader_mt.__index(self, key)

155 local category, base_path, merge_base_path, file_key

156 local merge = false

157 if

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

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

160 then

161 category = "env"

162 base_path = "../env/"

163 merge = true

164 merge_base_path = app_base .. "/env/"

165 file_key = key

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

167 category = "model"

168 base_path = app_base .. "/model/"

169 local first = true

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

171 function(c)

172 if first then

173 first = false

174 return string.lower(c)

175 else

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

177 end

178 end

179 )

180 else

181 return

182 end

183 local required_category = autoloader_category[self]

184 if required_category and required_category ~= category then return end

185 local path = autoloader_path[self]

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

187 local merge_path_string

188 if merge then

189 merge_path_string = compose_path_string(

190 merge_base_path, path, file_key

191 )

192 end

193 local function try_dir(dirname)

194 local dir = io.open(dirname)

195 if dir then

196 io.close(dir)

197 local obj = {}

198 local sub_path = {}

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

200 table.insert(sub_path, file_key)

201 install_autoloader(obj, category, sub_path)

202 rawset(self, key, obj)

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

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

205 return true

206 else

207 return false

208 end

209 end

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

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

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

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

214 else end

215 return rawget(self, key)

216 end

217 install_autoloader(_G, nil, {})

218 try_exec("../env/__init.lua")

219 end

220

221 -- interactive console mode

222 if not cgi then

223 local config_name = request.get_config_name()

224 if config_name then

225 execute.config(config_name)

226 end

227 return

228 end

229

230 local success, error_info = xpcall(

231 function()

232

233 -- execute configuration file

234 do

235 local config_name = request.get_config_name()

236 if config_name then

237 execute.config(config_name)

238 end

239 end

240

241 -- restore slots if coming from http redirect

242 if cgi.params.tempstore then

243 trace.restore_slots{}

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

245 if blob then slot.restore_all(blob) end

246 end

247

248 local function file_exists(filename)

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

250 if file then

251 io.close(file)

252 return true

253 else

254 return false

255 end

256 end

257

258 if cgi.params["_webmcp_404"] then

259 request.force_absolute_baseurl()

260 request.set_status("404 Not Found")

261 if request.get_404_route() then

262 request.forward(request.get_404_route())

263 else

264 error("No 404 page set.")

265 end

266 elseif request.get_action() then

267 trace.request{

268 module = request.get_module(),

269 action = request.get_action()

270 }

271 if

272 request.get_404_route() and

273 not file_exists(

274 encode.action_file_path{

275 module = request.get_module(),

276 action = request.get_action()

277 }

278 )

279 then

280 request.set_status("404 Not Found")

281 request.forward(request.get_404_route())

282 else

283 if cgi.method ~= "POST" then

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

285 cgi.add_header("Allow: POST")

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

287 end

288 local action_status = execute.filtered_action{

289 module = request.get_module(),

290 action = request.get_action(),

291 }

292 if not request.is_rerouted() then

293 local routing_mode, routing_module, routing_view

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

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

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

297 if not (routing_mode or routing_module or routing_view) then

298 action_status = "default"

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

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

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

302 end

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

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

305 if routing_mode == "redirect" then

306 local routing_params = {}

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

308 local status, stripped_key = string.match(

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

310 )

311 if status == action_status then

312 routing_params[stripped_key] = value

313 end

314 end

315 request.redirect{

316 module = routing_module,

317 view = routing_view,

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

319 params = routing_params

320 }

321 elseif routing_mode == "forward" then

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

323 else

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

325 end

326 end

327 end

328 else

329 -- no action

330 trace.request{

331 module = request.get_module(),

332 view = request.get_view()

333 }

334 if

335 request.get_404_route() and

336 not file_exists(

337 encode.view_file_path{

338 module = request.get_module(),

339 view = request.get_view()

340 }

341 )

342 then

343 request.set_status("404 Not Found")

344 request.forward(request.get_404_route())

345 end

346 end

347

348 if not request.get_redirect_data() then

349 request.process_forward()

350 execute.filtered_view{

351 module = request.get_module(),

352 view = request.get_view(),

353 }

354 end

355

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

357 --if request.get_redirect_data() then

358 -- request.get_absolute_baseurl()

359 --end

360

361 end,

362

363 function(errobj)

364 return {

365 errobj = errobj,

366 stacktrace = string.gsub(

367 debug.traceback('', 2),

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

369 )

370 }

371 end

372 )

373

374 if not success then trace.error{} end

375

376 -- laufzeitermittlung

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

378

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

380

381 local redirect_data = request.get_redirect_data()

382

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

384 if not success then

385 local errobj = error_info.errobj

386 local stacktrace = error_info.stacktrace

387 if not request.get_status() then

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

389 end

390 slot.set_layout('system_error')

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

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

393 slot.put(

394 "Database error of class ",

395 encode.html(errobj.code),

396 " occured: ",

397 encode.html(errobj.message),

398 ""

399 )

400 else

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

402 end

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

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

405 slot.put("")

406 end)

407 elseif redirect_data then

408 local redirect_params = {}

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

410 redirect_params[key] = value

411 end

412 local slot_dump = slot.dump_all()

413 if slot_dump ~= "" then

414 redirect_params.tempstore = tempstore.save(slot_dump)

415 end

416 cgi.redirect(

417 encode.url{

418 base = request.get_absolute_baseurl(),

419 module = redirect_data.module,

420 view = redirect_data.view,

421 id = redirect_data.id,

422 params = redirect_params

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 exit()