webmcp: c6ef9991b911 framework/bin/mcp.lua

webmcp

view framework/bin/mcp.lua @ 203:c6ef9991b911

Removed CGI support; Created draft for new MCP program to be used with "Moonbridge Network Server for Lua Applications"

author	jbe
date	Fri Jan 09 01:57:20 2015 +0100 (2015-01-09)
parents	framework/cgi-bin/webmcp.lua@8d7665e0d490
children	b059efd81649

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 -- store extra command line arguments

13 local extraargs = {select(3, ...)}

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

16 -- or print usage synopsis (if applicable)

17 do

18 local arg1, arg2 = ...

19 local helpout

20 if

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

22 arg2 == "-h" or arg2 == "--help"

23 then

24 helpout = io.stdout

25 elseif

26 (WEBMCP_MODE == "listen" and (#extraargs < 2 or #extraargs % 2 ~= 0)) or

27 (WEBMCP_MODE == "interactive" and arg2 == nil)

28 then

29 helpout = io.stderr

30 end

31 helpout:write("Usage: moonbridge -- mcp.lua <framework path> <app base path> <app name 1> <config name 1> [<app name 2> <config name 2> ...]\n")

32 helpout:write(" or: lua -i mcp.lua <framework path> <app base path> [<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 end

47 -- setup search paths for libraries

48 do

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

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

51 local slib_exts = {}

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

53 slib_exts[ext] = true

54 end

55 local paths = {}

56 for ext in pairs(slib_exts) do

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

58 end

59 for ext in pairs(slib_exts) do

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

61 end

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

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

64 end

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

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

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

69 do

70 local weakkey_mt = { __mode = "k" }

71 local autoloader_category = setmetatable({}, weakkey_mt)

72 local autoloader_path = setmetatable({}, weakkey_mt)

73 local autoloader_mt = {}

74 local function install_autoloader(self, category, path)

75 autoloader_category[self] = category

76 autoloader_path[self] = path

77 setmetatable(self, autoloader_mt)

78 end

79 local function try_exec(filename)

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

81 if file then

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

83 io.close(file)

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

85 if func then

86 func()

87 return true

88 else

89 error(errmsg, 0)

90 end

91 else

92 return false

93 end

94 end

95 local function compose_path_string(base, path, key)

96 if #path == 0 then

97 return base .. "/" .. key

98 else

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

100 end

101 end

102 function autoloader_mt.__index(self, key)

103 local category, base_path, merge_base_path, file_key

104 local merge = false

105 if

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

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

108 then

109 category = "env"

110 base_path = WEBMCP_FRAMEWORK_PATH .. "env/"

111 merge = true

112 merge_base_path = WEBMCP_BASE_PATH .. "env/"

113 file_key = key

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

115 category = "model"

116 base_path = WEBMCP_BASE_PATH .. "model/"

117 local first = true

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

119 function(c)

120 if first then

121 first = false

122 return string.lower(c)

123 else

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

125 end

126 end

127 )

128 else

129 return

130 end

131 local required_category = autoloader_category[self]

132 if required_category and required_category ~= category then return end

133 local path = autoloader_path[self]

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

135 local merge_path_string

136 if merge then

137 merge_path_string = compose_path_string(

138 merge_base_path, path, file_key

139 )

140 end

141 local function try_dir(dirname)

142 local dir = io.open(dirname)

143 if dir then

144 io.close(dir)

145 local obj = {}

146 local sub_path = {}

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

148 sub_path[#path+1] = file_key

149 install_autoloader(obj, category, sub_path)

150 rawset(self, key, obj)

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

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

153 return true

154 else

155 return false

156 end

157 end

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

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

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

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

162 else end

163 return rawget(self, key)

164 end

165 install_autoloader(_G, nil, {})

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

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

168 end

169

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

171 _ENV = setmetatable({}, {

172 __index = _G,

173 __newindex = function()

174 error("Setting of global variable prohibited")

175 end

176 })

177

178 -- interactive console mode

179 if WEBMCP_MODE == "interactive" then

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

181 local config_name = select(3, ...)

182 if config_name then

183 execute.config(config_name)

184 end

185 return

186 end

187

188 -- TODO: moonbridge support below this line and in env/request and env/slot

189

190 local success, error_info = xpcall(

191 function()

192

193 -- execute configuration file

194 do

195 local config_name = request.get_config_name()

196 if config_name then

197 execute.config(config_name)

198 end

199 end

200

201 -- restore slots if coming from http redirect

202 if cgi.params.tempstore then

203 trace.restore_slots{}

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

205 if blob then slot.restore_all(blob) end

206 end

207

208 local function file_exists(filename)

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

210 if file then

211 io.close(file)

212 return true

213 else

214 return false

215 end

216 end

217

218 if request.is_404() then

219 request.set_status("404 Not Found")

220 if request.get_404_route() then

221 request.forward(request.get_404_route())

222 else

223 error("No 404 page set.")

224 end

225 elseif request.get_action() then

226 trace.request{

227 module = request.get_module(),

228 action = request.get_action()

229 }

230 if

231 request.get_404_route() and

232 not file_exists(

233 encode.action_file_path{

234 module = request.get_module(),

235 action = request.get_action()

236 }

237 )

238 then

239 request.set_status("404 Not Found")

240 request.forward(request.get_404_route())

241 else

242 if cgi.method ~= "POST" then

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

244 cgi.add_header("Allow: POST")

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

246 end

247 local action_status = execute.filtered_action{

248 module = request.get_module(),

249 action = request.get_action(),

250 }

251 if not request.is_rerouted() then

252 local routing_mode, routing_module, routing_view

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

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

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

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

257 if not (routing_mode or routing_module or routing_view) then

258 action_status = "default"

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

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

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

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

263 end

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

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

266 if routing_mode == "redirect" then

267 local routing_params = {}

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

269 local status, stripped_key = string.match(

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

271 )

272 if status == action_status then

273 routing_params[stripped_key] = value

274 end

275 end

276 request.redirect{

277 module = routing_module,

278 view = routing_view,

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

280 params = routing_params,

281 anchor = routing_anchor

282 }

283 elseif routing_mode == "forward" then

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

285 else

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

287 end

288 end

289 end

290 else

291 -- no action

292 trace.request{

293 module = request.get_module(),

294 view = request.get_view()

295 }

296 if

297 request.get_404_route() and

298 not file_exists(

299 encode.view_file_path{

300 module = request.get_module(),

301 view = request.get_view()

302 }

303 )

304 then

305 request.set_status("404 Not Found")

306 request.forward(request.get_404_route())

307 end

308 end

309

310 if not request.get_redirect_data() then

311 request.process_forward()

312 local view = request.get_view()

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

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

315 end

316 execute.filtered_view{

317 module = request.get_module(),

318 view = view,

319 }

320 end

321

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

323 --if request.get_redirect_data() then

324 -- request.get_absolute_baseurl()

325 --end

326

327 end,

328

329 function(errobj)

330 return {

331 errobj = errobj,

332 stacktrace = string.gsub(

333 debug.traceback('', 2),

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

335 )

336 }

337 end

338 )

339

340 if not success then trace.error{} end

341

342 -- laufzeitermittlung

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

344

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

346

347 local redirect_data = request.get_redirect_data()

348

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

350 if not success then

351 local errobj = error_info.errobj

352 local stacktrace = error_info.stacktrace

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

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

355 end

356 slot.set_layout('system_error')

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

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

359 slot.put(

360 "Database error of class ",

361 encode.html(errobj.code),

362 " occured: ",

363 encode.html(errobj.message),

364 ""

365 )

366 else

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

368 end

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

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

371 slot.put("")

372 end)

373 elseif redirect_data then

374 local redirect_params = {}

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

376 redirect_params[key] = value

377 end

378 local slot_dump = slot.dump_all()

379 if slot_dump ~= "" then

380 redirect_params.tempstore = tempstore.save(slot_dump)

381 end

382 local json_request_slots = request.get_json_request_slots()

383 if json_request_slots then

384 redirect_params["_webmcp_json_slots[]"] = json_request_slots

385 end

386 cgi.redirect(

387 encode.url{

388 base = request.get_absolute_baseurl(),

389 module = redirect_data.module,

390 view = redirect_data.view,

391 id = redirect_data.id,

392 params = redirect_params,

393 anchor = redirect_data.anchor

394 }

395 )

396 cgi.send_data()

397 end

398

399 if not success or not redirect_data then

400

401 local http_status = request.get_status()

402 if http_status then

403 cgi.set_status(http_status)

404 end

405

406 local json_request_slots = request.get_json_request_slots()

407 if json_request_slots then

408 cgi.set_content_type('application/json')

409 local data = {}

410 for idx, slot_ident in ipairs(json_request_slots) do

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

412 end

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

414 else

415 cgi.set_content_type(slot.get_content_type())

416 cgi.send_data(slot.render_layout())

417 end

418 end

419

420 exit()