webmcp

view framework/cgi-bin/webmcp.lua @ 10:e017c47d43b5

Modified encode.json to avoid special CDATA sequences in output
author jbe
date Wed Feb 03 00:57:18 2010 +0100 (2010-02-03)
parents 5cba83b3f411
children d76a8857ba62
line source
1 #!/usr/bin/env lua
3 _WEBMCP_VERSION = "1.0.6"
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 --//--
105 --[[--
106 config -- table to store application configuration
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 --//--
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
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
230 local success, error_info = xpcall(
231 function()
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
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
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
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
348 if not request.get_redirect_data() then
349 request.process_forward()
350 local view = request.get_view()
351 if string.find(view, "^_") then
352 error("Tried to call a private view (prefixed with underscore).")
353 end
354 execute.filtered_view{
355 module = request.get_module(),
356 view = view,
357 }
358 end
360 -- force error due to missing absolute base URL until its too late to display error message
361 --if request.get_redirect_data() then
362 -- request.get_absolute_baseurl()
363 --end
365 end,
367 function(errobj)
368 return {
369 errobj = errobj,
370 stacktrace = string.gsub(
371 debug.traceback('', 2),
372 "^\r?\n?stack traceback:\r?\n?", ""
373 )
374 }
375 end
376 )
378 if not success then trace.error{} end
380 -- laufzeitermittlung
381 trace.exectime{ real = os.monotonic_hires_time(), cpu = os.clock() }
383 slot.select('trace', trace.render) -- render trace information
385 local redirect_data = request.get_redirect_data()
387 -- log error and switch to error layout, unless success
388 if not success then
389 local errobj = error_info.errobj
390 local stacktrace = error_info.stacktrace
391 if not request.get_status() then
392 request.set_status("500 Internal Server Error")
393 end
394 slot.set_layout('system_error')
395 slot.select('system_error', function()
396 if getmetatable(errobj) == mondelefant.errorobject_metatable then
397 slot.put(
398 "<p>Database error of class <b>",
399 encode.html(errobj.code),
400 "</b> occured:<br/><b>",
401 encode.html(errobj.message),
402 "</b></p>"
403 )
404 else
405 slot.put("<p><b>", encode.html(tostring(errobj)), "</b></p>")
406 end
407 slot.put("<p>Stack trace follows:<br/>")
408 slot.put(encode.html_newlines(encode.html(stacktrace)))
409 slot.put("</p>")
410 end)
411 elseif redirect_data then
412 local redirect_params = {}
413 for key, value in pairs(redirect_data.params) do
414 redirect_params[key] = value
415 end
416 local slot_dump = slot.dump_all()
417 if slot_dump ~= "" then
418 redirect_params.tempstore = tempstore.save(slot_dump)
419 end
420 cgi.redirect(
421 encode.url{
422 base = request.get_absolute_baseurl(),
423 module = redirect_data.module,
424 view = redirect_data.view,
425 id = redirect_data.id,
426 params = redirect_params
427 }
428 )
429 cgi.send_data()
430 end
432 if not success or not redirect_data then
434 local http_status = request.get_status()
435 if http_status then
436 cgi.set_status(http_status)
437 end
439 local json_request_slots = request.get_json_request_slots()
440 if json_request_slots then
441 cgi.set_content_type('application/json')
442 local data = {}
443 for idx, slot_ident in ipairs(json_request_slots) do
444 data[slot_ident] = slot.get_content(slot_ident)
445 end
446 cgi.send_data(encode.json(data))
447 else
448 cgi.set_content_type(slot.get_content_type())
449 cgi.send_data(slot.render_layout())
450 end
451 end
453 exit()

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