webmcp
view framework/env/request/process.lua @ 254:2169a62e12f5
Work on demo application (to fit modified WebMCP API); Bugfixes of WebMCP
| author | jbe |
|---|---|
| date | Mon Mar 02 01:15:34 2015 +0100 (2015-03-02) |
| parents | e60ef3334d92 |
| children |
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 if request._route.static then
19 local f = assert(io.open(WEBMCP_BASE_PATH .. "static/" .. request._route.static, "r"))
20 local d = f:read("*a")
21 f:close()
22 slot.put_into("data", d)
23 slot.set_layout(nil, "application/octet-stream") -- TODO
24 return
25 end
27 -- restore slots if coming from http redirect
28 local tempstore_value = request._http_request.get_params["_tempstore"]
29 if tempstore_value then
30 trace.restore_slots{}
31 local blob = tempstore.pop(tempstore_value)
32 if blob then slot.restore_all(blob) end
33 end
35 if request.get_action() then
36 trace.request{
37 module = request.get_module(),
38 action = request.get_action()
39 }
40 if
41 request.get_404_route() and
42 not file_exists(
43 encode.action_file_path{
44 module = request.get_module(),
45 action = request.get_action()
46 }
47 )
48 then
49 request.set_status("404 Not Found")
50 request.forward(request.get_404_route())
51 else
52 if request._http_request.method ~= "POST" then
53 request.set_status("405 Method Not Allowed")
54 request.add_header("Allow", "POST")
55 error("Tried to invoke an action with a GET request.")
56 end
57 local action_status = execute.filtered_action{
58 module = request.get_module(),
59 action = request.get_action(),
60 }
61 if not request.is_rerouted() then
62 local routing_mode, routing_module, routing_view, routing_anchor
63 routing_mode = request._http_request.post_params["_webmcp_routing." .. action_status .. ".mode"]
64 routing_module = request._http_request.post_params["_webmcp_routing." .. action_status .. ".module"]
65 routing_view = request._http_request.post_params["_webmcp_routing." .. action_status .. ".view"]
66 routing_anchor = request._http_request.post_params["_webmcp_routing." .. action_status .. ".anchor"]
67 if not (routing_mode or routing_module or routing_view) then
68 action_status = "default"
69 routing_mode = request._http_request.post_params["_webmcp_routing.default.mode"]
70 routing_module = request._http_request.post_params["_webmcp_routing.default.module"]
71 routing_view = request._http_request.post_params["_webmcp_routing.default.view"]
72 routing_anchor = request._http_request.post_params["_webmcp_routing.default.anchor"]
73 end
74 assert(routing_module, "Routing information has no module.")
75 assert(routing_view, "Routing information has no view.")
76 if routing_mode == "redirect" then
77 local routing_params = {}
78 for key, value in pairs(request.get_param_strings{ method="POST", include_internal=true }) do
79 local status, stripped_key = string.match(
80 key, "^_webmcp_routing%.([^%.]*)%.params%.(.*)$"
81 )
82 if status == action_status then
83 routing_params[stripped_key] = value
84 end
85 end
86 request.redirect{
87 module = routing_module,
88 view = routing_view,
89 id = request._http_request.post_params["_webmcp_routing." .. action_status .. ".id"],
90 params = routing_params,
91 anchor = routing_anchor
92 }
93 elseif routing_mode == "forward" then
94 request.forward{ module = routing_module, view = routing_view }
95 else
96 error("Missing or unknown routing mode in request parameters.")
97 end
98 end
99 end
100 else
101 -- no action
102 trace.request{
103 module = request.get_module(),
104 view = request.get_view()
105 }
106 if
107 request.get_404_route() and
108 not file_exists(
109 encode.view_file_path{
110 module = request.get_module(),
111 view = request.get_view()
112 }
113 )
114 then
115 request.set_status("404 Not Found")
116 request.forward(request.get_404_route())
117 end
118 end
120 if not request.get_redirect_data() then
121 request.process_forward()
122 local view = request.get_view()
123 if string.find(view, "^_") then
124 error("Tried to call a private view (prefixed with underscore).")
125 end
126 execute.filtered_view{
127 module = request.get_module(),
128 view = view,
129 }
130 end
132 -- force error due to missing absolute base URL until its too late to display error message
133 --if request.get_redirect_data() then
134 -- request.get_absolute_baseurl()
135 --end
137 end,
139 function(errobj)
140 return {
141 errobj = errobj,
142 stacktrace = string.gsub(
143 debug.traceback('', 2),
144 "^\r?\n?stack traceback:\r?\n?", ""
145 )
146 }
147 end
148 )
150 if not success then trace.error{} end
152 -- TODO: extend trace system to generally monitor execution time
153 -- trace.exectime{ real = extos.monotonic_hires_time(), cpu = os.clock() }
155 slot.select('trace', trace.render) -- render trace information
157 local redirect_data = request.get_redirect_data()
159 -- log error and switch to error layout, unless success
160 if not success then
161 local errobj = error_info.errobj
162 local stacktrace = error_info.stacktrace
163 if not request._status then
164 request._status = "500 Internal Server Error"
165 end
166 slot.set_layout('system_error')
167 slot.select('system_error', function()
168 if getmetatable(errobj) == mondelefant.errorobject_metatable then
169 slot.put(
170 "<p>Database error of class <b>",
171 encode.html(errobj.code),
172 "</b> occured:<br/><b>",
173 encode.html(errobj.message),
174 "</b></p>"
175 )
176 else
177 slot.put("<p><b>", encode.html(tostring(errobj)), "</b></p>")
178 end
179 slot.put("<p>Stack trace follows:<br/>")
180 slot.put(encode.html_newlines(encode.html(stacktrace)))
181 slot.put("</p>")
182 end)
183 elseif redirect_data then
184 local redirect_params = {}
185 for key, value in pairs(redirect_data.params) do
186 redirect_params[key] = value
187 end
188 local slot_dump = slot.dump_all()
189 if slot_dump ~= "" then
190 redirect_params.tempstore = tempstore.save(slot_dump)
191 end
192 request._http_request:send_status("303 See Other")
193 request._http_request:send_header("Connection", "close") -- TODO: extend moonbridge
194 request._http_request:send_header(
195 "Location",
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 request._http_request:finish()
206 end
208 if not success or not redirect_data then
210 request._http_request:send_status(request._status or "200 OK")
211 request._http_request:send_header("Connection", "close") -- TODO: extend moonbridge
212 for i, header in ipairs(request._response_headers) do
213 request._http_request:send_header(header[1], header[2])
214 end
215 request._http_request:send_header("Content-Type", slot.get_content_type())
216 request._http_request:send_data(slot.render_layout())
217 request._http_request:finish()
218 end
220 end