webmcp
view framework/env/request/process.lua @ 229:bf690b4be420
Workaround for postfork-loading of multirand library
| author | jbe |
|---|---|
| date | Fri Feb 27 22:45:36 2015 +0100 (2015-02-27) |
| parents | 32ec28229bb5 |
| children | d5cba50e16ae |
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()
15 local success, error_info = xpcall(
16 function()
18 -- restore slots if coming from http redirect
19 local tempstore_value = request._http_request.get_params["_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
26 if request.get_action() then
27 trace.request{
28 module = request.get_module(),
29 action = request.get_action()
30 }
31 if
32 request.get_404_route() and
33 not file_exists(
34 encode.action_file_path{
35 module = request.get_module(),
36 action = request.get_action()
37 }
38 )
39 then
40 request.set_status("404 Not Found")
41 request.forward(request.get_404_route())
42 else
43 if request._http_request.method ~= "POST" then
44 request.set_status("405 Method Not Allowed")
45 request.add_header("Allow", "POST")
46 error("Tried to invoke an action with a GET request.")
47 end
48 local action_status = execute.filtered_action{
49 module = request.get_module(),
50 action = request.get_action(),
51 }
52 if not request.is_rerouted() then
53 local routing_mode, routing_module, routing_view
54 routing_mode = request._http_request.post_params["_webmcp_routing." .. action_status .. ".mode"]
55 routing_module = request._http_request.post_params["_webmcp_routing." .. action_status .. ".module"]
56 routing_view = request._http_request.post_params["_webmcp_routing." .. action_status .. ".view"]
57 routing_anchor = request._http_request.post_params["_webmcp_routing." .. action_status .. ".anchor"]
58 if not (routing_mode or routing_module or routing_view) then
59 action_status = "default"
60 routing_mode = request._http_request.post_params["_webmcp_routing.default.mode"]
61 routing_module = request._http_request.post_params["_webmcp_routing.default.module"]
62 routing_view = request._http_request.post_params["_webmcp_routing.default.view"]
63 routing_anchor = request._http_request.post_params["_webmcp_routing.default.anchor"]
64 end
65 assert(routing_module, "Routing information has no module.")
66 assert(routing_view, "Routing information has no view.")
67 if routing_mode == "redirect" then
68 local routing_params = {}
69 for key, value in request.get_param_strings{ method="POST", include_internal=true } do
70 local status, stripped_key = string.match(
71 key, "^_webmcp_routing%.([^%.]*)%.params%.(.*)$"
72 )
73 if status == action_status then
74 routing_params[stripped_key] = value
75 end
76 end
77 request.redirect{
78 module = routing_module,
79 view = routing_view,
80 id = request._http_request.post_params["_webmcp_routing." .. action_status .. ".id"],
81 params = routing_params,
82 anchor = routing_anchor
83 }
84 elseif routing_mode == "forward" then
85 request.forward{ module = routing_module, view = routing_view }
86 else
87 error("Missing or unknown routing mode in request parameters.")
88 end
89 end
90 end
91 else
92 -- no action
93 trace.request{
94 module = request.get_module(),
95 view = request.get_view()
96 }
97 if
98 request.get_404_route() and
99 not file_exists(
100 encode.view_file_path{
101 module = request.get_module(),
102 view = request.get_view()
103 }
104 )
105 then
106 request.set_status("404 Not Found")
107 request.forward(request.get_404_route())
108 end
109 end
111 if not request.get_redirect_data() then
112 request.process_forward()
113 local view = request.get_view()
114 if string.find(view, "^_") then
115 error("Tried to call a private view (prefixed with underscore).")
116 end
117 execute.filtered_view{
118 module = request.get_module(),
119 view = view,
120 }
121 end
123 -- force error due to missing absolute base URL until its too late to display error message
124 --if request.get_redirect_data() then
125 -- request.get_absolute_baseurl()
126 --end
128 end,
130 function(errobj)
131 return {
132 errobj = errobj,
133 stacktrace = string.gsub(
134 debug.traceback('', 2),
135 "^\r?\n?stack traceback:\r?\n?", ""
136 )
137 }
138 end
139 )
141 if not success then trace.error{} end
143 -- TODO: extend trace system to generally monitor execution time
144 -- trace.exectime{ real = extos.monotonic_hires_time(), cpu = os.clock() }
146 slot.select('trace', trace.render) -- render trace information
148 local redirect_data = request.get_redirect_data()
150 -- log error and switch to error layout, unless success
151 if not success then
152 local errobj = error_info.errobj
153 local stacktrace = error_info.stacktrace
154 if not request._status then
155 request._status = "500 Internal Server Error"
156 end
157 slot.set_layout('system_error')
158 slot.select('system_error', function()
159 if getmetatable(errobj) == mondelefant.errorobject_metatable then
160 slot.put(
161 "<p>Database error of class <b>",
162 encode.html(errobj.code),
163 "</b> occured:<br/><b>",
164 encode.html(errobj.message),
165 "</b></p>"
166 )
167 else
168 slot.put("<p><b>", encode.html(tostring(errobj)), "</b></p>")
169 end
170 slot.put("<p>Stack trace follows:<br/>")
171 slot.put(encode.html_newlines(encode.html(stacktrace)))
172 slot.put("</p>")
173 end)
174 elseif redirect_data then
175 local redirect_params = {}
176 for key, value in pairs(redirect_data.params) do
177 redirect_params[key] = value
178 end
179 local slot_dump = slot.dump_all()
180 if slot_dump ~= "" then
181 redirect_params.tempstore = tempstore.save(slot_dump)
182 end
183 request._http_request:send_status("303 See Other")
184 request._http_request:send_header(
185 "Location",
186 encode.url{
187 base = request.get_absolute_baseurl(),
188 module = redirect_data.module,
189 view = redirect_data.view,
190 id = redirect_data.id,
191 params = redirect_params,
192 anchor = redirect_data.anchor
193 }
194 )
195 request._http_request:finish()
196 end
198 if not success or not redirect_data then
200 request._http_request:send_status(request._status or "200 OK")
201 for i, header in ipairs(request._response_headers) do
202 request._http_request:send_header(header[1], header[2])
203 end
204 request._http_request:send_header("Content-Type", slot.get_content_type())
205 request._http_request:send_data(slot.render_layout())
206 request._http_request:finish()
207 end
209 end