webmcp
view framework/env/request/process.lua @ 216:fd0360594636
Work on request.process(...), request.default_router(...), request.router(), request.handler(...)
| author | jbe |
|---|---|
| date | Mon Jan 12 03:02:26 2015 +0100 (2015-01-12) |
| parents | framework/env/request/default_router.lua@ba3dd4a17e3d |
| children | 25a20bd1f416 |
line source
1 -- TODO: function incomplete yet
3 local function file_exists(filename)
4 local file = io.open(filename, "r")
5 if file then
6 io.close(file)
7 return true
8 else
9 return false
10 end
11 end
13 function request.process(route)
15 local success, error_info = xpcall(
16 function()
18 -- restore slots if coming from http redirect
19 local tempstore_value = request.get_param{method = "GET", name = "_tempstore"}
20 if tempstore_value then
21 trace.restore_slots{}
22 local blob = tempstore.pop(tempstore_value)
23 if blob then slot.restore_all(blob) end
24 end
27 if request.is_404() then
28 request.set_status("404 Not Found")
29 if request.get_404_route() then
30 request.forward(request.get_404_route())
31 else
32 error("No 404 page set.")
33 end
34 elseif request.get_action() then
35 trace.request{
36 module = request.get_module(),
37 action = request.get_action()
38 }
39 if
40 request.get_404_route() and
41 not file_exists(
42 encode.action_file_path{
43 module = request.get_module(),
44 action = request.get_action()
45 }
46 )
47 then
48 request.set_status("404 Not Found")
49 request.forward(request.get_404_route())
50 else
51 if cgi.method ~= "POST" then
52 request.set_status("405 Method Not Allowed")
53 cgi.add_header("Allow: POST")
54 error("Tried to invoke an action with a GET request.")
55 end
56 local action_status = execute.filtered_action{
57 module = request.get_module(),
58 action = request.get_action(),
59 }
60 if not request.is_rerouted() then
61 local routing_mode, routing_module, routing_view
62 routing_mode = cgi.params["_webmcp_routing." .. action_status .. ".mode"]
63 routing_module = cgi.params["_webmcp_routing." .. action_status .. ".module"]
64 routing_view = cgi.params["_webmcp_routing." .. action_status .. ".view"]
65 routing_anchor = cgi.params["_webmcp_routing." .. action_status .. ".anchor"]
66 if not (routing_mode or routing_module or routing_view) then
67 action_status = "default"
68 routing_mode = cgi.params["_webmcp_routing.default.mode"]
69 routing_module = cgi.params["_webmcp_routing.default.module"]
70 routing_view = cgi.params["_webmcp_routing.default.view"]
71 routing_anchor = cgi.params["_webmcp_routing.default.anchor"]
72 end
73 assert(routing_module, "Routing information has no module.")
74 assert(routing_view, "Routing information has no view.")
75 if routing_mode == "redirect" then
76 local routing_params = {}
77 for key, value in pairs(cgi.params) do
78 local status, stripped_key = string.match(
79 key, "^_webmcp_routing%.([^%.]*)%.params%.(.*)$"
80 )
81 if status == action_status then
82 routing_params[stripped_key] = value
83 end
84 end
85 request.redirect{
86 module = routing_module,
87 view = routing_view,
88 id = cgi.params["_webmcp_routing." .. action_status .. ".id"],
89 params = routing_params,
90 anchor = routing_anchor
91 }
92 elseif routing_mode == "forward" then
93 request.forward{ module = routing_module, view = routing_view }
94 else
95 error("Missing or unknown routing mode in request parameters.")
96 end
97 end
98 end
99 else
100 -- no action
101 trace.request{
102 module = request.get_module(),
103 view = request.get_view()
104 }
105 if
106 request.get_404_route() and
107 not file_exists(
108 encode.view_file_path{
109 module = request.get_module(),
110 view = request.get_view()
111 }
112 )
113 then
114 request.set_status("404 Not Found")
115 request.forward(request.get_404_route())
116 end
117 end
119 if not request.get_redirect_data() then
120 request.process_forward()
121 local view = request.get_view()
122 if string.find(view, "^_") then
123 error("Tried to call a private view (prefixed with underscore).")
124 end
125 execute.filtered_view{
126 module = request.get_module(),
127 view = view,
128 }
129 end
131 -- force error due to missing absolute base URL until its too late to display error message
132 --if request.get_redirect_data() then
133 -- request.get_absolute_baseurl()
134 --end
136 end,
138 function(errobj)
139 return {
140 errobj = errobj,
141 stacktrace = string.gsub(
142 debug.traceback('', 2),
143 "^\r?\n?stack traceback:\r?\n?", ""
144 )
145 }
146 end
147 )
149 if not success then trace.error{} end
151 -- laufzeitermittlung
152 trace.exectime{ real = extos.monotonic_hires_time(), cpu = os.clock() }
154 slot.select('trace', trace.render) -- render trace information
156 local redirect_data = request.get_redirect_data()
158 -- log error and switch to error layout, unless success
159 if not success then
160 local errobj = error_info.errobj
161 local stacktrace = error_info.stacktrace
162 if not request.get_status() and not request.get_json_request_slots() then
163 request.set_status("500 Internal Server Error")
164 end
165 slot.set_layout('system_error')
166 slot.select('system_error', function()
167 if getmetatable(errobj) == mondelefant.errorobject_metatable then
168 slot.put(
169 "<p>Database error of class <b>",
170 encode.html(errobj.code),
171 "</b> occured:<br/><b>",
172 encode.html(errobj.message),
173 "</b></p>"
174 )
175 else
176 slot.put("<p><b>", encode.html(tostring(errobj)), "</b></p>")
177 end
178 slot.put("<p>Stack trace follows:<br/>")
179 slot.put(encode.html_newlines(encode.html(stacktrace)))
180 slot.put("</p>")
181 end)
182 elseif redirect_data then
183 local redirect_params = {}
184 for key, value in pairs(redirect_data.params) do
185 redirect_params[key] = value
186 end
187 local slot_dump = slot.dump_all()
188 if slot_dump ~= "" then
189 redirect_params.tempstore = tempstore.save(slot_dump)
190 end
191 local json_request_slots = request.get_json_request_slots()
192 if json_request_slots then
193 redirect_params["_webmcp_json_slots[]"] = json_request_slots
194 end
195 cgi.redirect(
196 encode.url{
197 base = request.get_absolute_baseurl(),
198 module = redirect_data.module,
199 view = redirect_data.view,
200 id = redirect_data.id,
201 params = redirect_params,
202 anchor = redirect_data.anchor
203 }
204 )
205 cgi.send_data()
206 end
208 if not success or not redirect_data then
210 local http_status = request.get_status()
211 if http_status then
212 cgi.set_status(http_status)
213 end
215 local json_request_slots = request.get_json_request_slots()
216 if json_request_slots then
217 cgi.set_content_type('application/json')
218 local data = {}
219 for idx, slot_ident in ipairs(json_request_slots) do
220 data[slot_ident] = slot.get_content(slot_ident)
221 end
222 cgi.send_data(encode.json(data))
223 else
224 cgi.set_content_type(slot.get_content_type())
225 cgi.send_data(slot.render_layout())
226 end
227 end
229 end