webmcp

annotate framework/env/request/handler.lua @ 328:04b0687130d8

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Bugfix regarding request_per_connection counting; Use new :close_after_finish() method of Moonbridge
author jbe
date Tue Mar 24 01:58:17 2015 +0100 (2015-03-24)
parents d8480a60a07d
children 3db9b672ee73
rev   line source
jbe@215 1 --[[--
jbe@327 2 success = -- false if an error occurred, true otherwise
jbe@215 3 request.handler(
jbe@270 4 http_request, -- HTTP request object
jbe@215 5 )
jbe@215 6
jbe@316 7 Called by mcp.lua to process an HTTP request. Calls request.router(), and handles the request. Note: request initializers will have to be (automatically) executed before this function is invoked by mcp.lua.
jbe@215 8
jbe@215 9 --]]--
jbe@210 10
jbe@255 11 local function file_exists(filename)
jbe@255 12 local file = io.open(filename, "r")
jbe@255 13 if file then
jbe@255 14 io.close(file)
jbe@255 15 return true
jbe@255 16 else
jbe@255 17 return false
jbe@255 18 end
jbe@255 19 end
jbe@255 20
jbe@264 21 function request.handler(http_request, close)
jbe@212 22 request._http_request = http_request
jbe@215 23 local path = http_request.path
jbe@215 24 if path then
jbe@221 25 local relative_baseurl_elements = {}
jbe@215 26 for match in string.gmatch(path, "/") do
jbe@221 27 relative_baseurl_elements[#relative_baseurl_elements+1] = "../"
jbe@215 28 end
jbe@280 29 if #relative_baseurl_elements > 0 then
jbe@280 30 request._relative_baseurl = table.concat(relative_baseurl_elements)
jbe@280 31 else
jbe@280 32 request._relative_baseurl = "./"
jbe@280 33 end
jbe@215 34 else
jbe@215 35 request._relative_baseurl = nil
jbe@215 36 end
jbe@241 37 request._route = request.router() or {}
jbe@275 38 do
jbe@275 39 local post_id = http_request.post_params["_webmcp_id"]
jbe@275 40 if post_id then
jbe@275 41 request._route.id = post_id
jbe@275 42 end
jbe@275 43 end
jbe@255 44
jbe@255 45 local success, error_info = xpcall(
jbe@255 46 function()
jbe@255 47
jbe@255 48 if request._route.static then
jbe@270 49 local f, errmsg = io.open(WEBMCP_BASE_PATH .. "static/" .. request._route.static, "r")
jbe@270 50 if not f then
jbe@328 51 request.set_status("404 Not Found")
jbe@270 52 if request.get_404_route() then
jbe@270 53 request.forward(request.get_404_route())
jbe@270 54 else
jbe@270 55 error('Could not open static file "' .. request._route.static .. '": ' .. errmsg)
jbe@270 56 end
jbe@327 57 else
jbe@327 58 local d = assert(f:read("*a"))
jbe@327 59 f:close()
jbe@327 60 slot.put_into("data", d)
jbe@327 61 local filename_extension = string.match(request._route.static, "%.([^.]+)$")
jbe@327 62 slot.set_layout(nil, request._mime_types[filename_extension] or "application/octet-stream")
jbe@327 63 request.allow_caching()
jbe@327 64 return
jbe@270 65 end
jbe@255 66 end
jbe@255 67
jbe@255 68 -- restore slots if coming from http redirect
jbe@327 69 do
jbe@327 70 local tempstore_value = http_request.get_params["_tempstore"]
jbe@327 71 if tempstore_value then
jbe@327 72 trace.restore_slots{}
jbe@327 73 local blob = tempstore.pop(tempstore_value)
jbe@327 74 if blob then slot.restore_all(blob) end
jbe@327 75 end
jbe@255 76 end
jbe@255 77
jbe@255 78 if request.get_action() then
jbe@255 79 trace.request{
jbe@255 80 module = request.get_module(),
jbe@255 81 action = request.get_action()
jbe@255 82 }
jbe@255 83 if
jbe@255 84 request.get_404_route() and
jbe@255 85 not file_exists(
jbe@255 86 encode.action_file_path{
jbe@255 87 module = request.get_module(),
jbe@255 88 action = request.get_action()
jbe@255 89 }
jbe@255 90 )
jbe@255 91 then
jbe@255 92 request.set_status("404 Not Found")
jbe@255 93 request.forward(request.get_404_route())
jbe@255 94 else
jbe@255 95 if http_request.method ~= "POST" then
jbe@255 96 request.set_status("405 Method Not Allowed")
jbe@255 97 request.add_header("Allow", "POST")
jbe@255 98 error("Tried to invoke an action with a GET request.")
jbe@255 99 end
jbe@255 100 local action_status = execute.filtered_action{
jbe@255 101 module = request.get_module(),
jbe@255 102 action = request.get_action(),
jbe@255 103 }
jbe@255 104 if not request.is_rerouted() then
jbe@255 105 local routing_mode, routing_module, routing_view, routing_anchor
jbe@255 106 routing_mode = http_request.post_params["_webmcp_routing." .. action_status .. ".mode"]
jbe@255 107 routing_module = http_request.post_params["_webmcp_routing." .. action_status .. ".module"]
jbe@255 108 routing_view = http_request.post_params["_webmcp_routing." .. action_status .. ".view"]
jbe@255 109 routing_anchor = http_request.post_params["_webmcp_routing." .. action_status .. ".anchor"]
jbe@255 110 if not (routing_mode or routing_module or routing_view) then
jbe@255 111 action_status = "default"
jbe@255 112 routing_mode = http_request.post_params["_webmcp_routing.default.mode"]
jbe@255 113 routing_module = http_request.post_params["_webmcp_routing.default.module"]
jbe@255 114 routing_view = http_request.post_params["_webmcp_routing.default.view"]
jbe@255 115 routing_anchor = http_request.post_params["_webmcp_routing.default.anchor"]
jbe@255 116 end
jbe@255 117 assert(routing_module, "Routing information has no module.")
jbe@255 118 assert(routing_view, "Routing information has no view.")
jbe@255 119 if routing_mode == "redirect" then
jbe@255 120 local routing_params = {}
jbe@255 121 for key, value in pairs(request.get_param_strings{ method="POST", include_internal=true }) do
jbe@255 122 local status, stripped_key = string.match(
jbe@255 123 key, "^_webmcp_routing%.([^%.]*)%.params%.(.*)$"
jbe@255 124 )
jbe@255 125 if status == action_status then
jbe@255 126 routing_params[stripped_key] = value
jbe@255 127 end
jbe@255 128 end
jbe@255 129 request.redirect{
jbe@255 130 module = routing_module,
jbe@255 131 view = routing_view,
jbe@255 132 id = http_request.post_params["_webmcp_routing." .. action_status .. ".id"],
jbe@255 133 params = routing_params,
jbe@255 134 anchor = routing_anchor
jbe@255 135 }
jbe@255 136 elseif routing_mode == "forward" then
jbe@255 137 request.forward{ module = routing_module, view = routing_view }
jbe@255 138 else
jbe@255 139 error("Missing or unknown routing mode in request parameters.")
jbe@255 140 end
jbe@255 141 end
jbe@255 142 end
jbe@255 143 else
jbe@255 144 -- no action
jbe@255 145 trace.request{
jbe@255 146 module = request.get_module(),
jbe@255 147 view = request.get_view()
jbe@255 148 }
jbe@255 149 if
jbe@255 150 request.get_404_route() and
jbe@255 151 not file_exists(
jbe@255 152 encode.view_file_path{
jbe@255 153 module = request.get_module(),
jbe@255 154 view = request.get_view()
jbe@255 155 }
jbe@255 156 )
jbe@255 157 then
jbe@255 158 request.set_status("404 Not Found")
jbe@255 159 request.forward(request.get_404_route())
jbe@255 160 end
jbe@255 161 end
jbe@255 162
jbe@255 163 if not request.get_redirect_data() then
jbe@255 164 request.process_forward()
jbe@255 165 local view = request.get_view()
jbe@255 166 if string.find(view, "^_") then
jbe@255 167 error("Tried to call a private view (prefixed with underscore).")
jbe@255 168 end
jbe@255 169 execute.filtered_view{
jbe@255 170 module = request.get_module(),
jbe@255 171 view = view,
jbe@255 172 }
jbe@255 173 end
jbe@255 174
jbe@255 175 end,
jbe@255 176
jbe@255 177 function(errobj)
jbe@255 178 return {
jbe@255 179 errobj = errobj,
jbe@255 180 stacktrace = string.gsub(
jbe@255 181 debug.traceback('', 2),
jbe@255 182 "^\r?\n?stack traceback:\r?\n?", ""
jbe@255 183 )
jbe@255 184 }
jbe@255 185 end
jbe@255 186 )
jbe@255 187
jbe@255 188 if not success then trace.error{} end
jbe@255 189
jbe@255 190 -- TODO: extend trace system to generally monitor execution time
jbe@255 191 -- trace.exectime{ real = extos.monotonic_hires_time(), cpu = os.clock() }
jbe@255 192
jbe@255 193 slot.select('trace', trace.render) -- render trace information
jbe@255 194
jbe@255 195 local redirect_data = request.get_redirect_data()
jbe@255 196
jbe@255 197 -- log error and switch to error layout, unless success
jbe@255 198 if not success then
jbe@255 199 local errobj = error_info.errobj
jbe@255 200 local stacktrace = error_info.stacktrace
jbe@255 201 if not request._status then
jbe@255 202 request._status = "500 Internal Server Error"
jbe@255 203 end
jbe@328 204 http_request:close_after_finish()
jbe@255 205 slot.set_layout('system_error')
jbe@255 206 slot.select('system_error', function()
jbe@255 207 if getmetatable(errobj) == mondelefant.errorobject_metatable then
jbe@255 208 slot.put(
jbe@255 209 "<p>Database error of class <b>",
jbe@255 210 encode.html(errobj.code),
jbe@255 211 "</b> occured:<br/><b>",
jbe@255 212 encode.html(errobj.message),
jbe@255 213 "</b></p>"
jbe@255 214 )
jbe@255 215 else
jbe@255 216 slot.put("<p><b>", encode.html(tostring(errobj)), "</b></p>")
jbe@255 217 end
jbe@255 218 slot.put("<p>Stack trace follows:<br/>")
jbe@255 219 slot.put(encode.html_newlines(encode.html(stacktrace)))
jbe@255 220 slot.put("</p>")
jbe@255 221 end)
jbe@255 222 elseif redirect_data then
jbe@267 223 redirect_data = table.new(redirect_data)
jbe@267 224 redirect_data.params = table.new(redirect_data.params)
jbe@255 225 local slot_dump = slot.dump_all()
jbe@255 226 if slot_dump ~= "" then
jbe@312 227 redirect_data.params._tempstore = tempstore.save(slot_dump)
jbe@255 228 end
jbe@255 229 http_request:send_status("303 See Other")
jbe@264 230 for i, header in ipairs(request._response_headers) do
jbe@264 231 http_request:send_header(header[1], header[2])
jbe@264 232 end
jbe@267 233 http_request:send_header("Location", encode.url(redirect_data))
jbe@255 234 http_request:finish()
jbe@255 235 end
jbe@255 236
jbe@255 237 if not success or not redirect_data then
jbe@255 238
jbe@255 239 http_request:send_status(request._status or "200 OK")
jbe@255 240 for i, header in ipairs(request._response_headers) do
jbe@255 241 http_request:send_header(header[1], header[2])
jbe@255 242 end
jbe@291 243 if not request._cache_manual then
jbe@291 244 local cache_time = request._cache_time
jbe@291 245 if request._cache and cache_time and cache_time > 0 then
jbe@291 246 http_request:send_header("Cache-Control", "max-age=" .. cache_time)
jbe@291 247 else
jbe@291 248 http_request:send_header("Cache-Control", "no-cache")
jbe@291 249 end
jbe@291 250 end
jbe@255 251 http_request:send_header("Content-Type", slot.get_content_type())
jbe@255 252 http_request:send_data(slot.render_layout())
jbe@255 253 http_request:finish()
jbe@255 254 end
jbe@255 255
jbe@327 256 return success
jbe@327 257
jbe@215 258 end

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