webmcp

annotate framework/env/request/handler.lua @ 360:785ff282af16

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Changed version string to "2.0.1"
author jbe
date Thu Mar 26 20:51:35 2015 +0100 (2015-03-26)
parents 545ec2e3eafa
children 4e03ecb28665
rev   line source
jbe@215 1 --[[--
jbe@327 2 success = -- false if an error occurred, true otherwise
jbe@215 3 request.handler(
jbe@349 4 http_request -- HTTP request object
jbe@215 5 )
jbe@215 6
jbe@358 7 Called by mcp.lua to process an HTTP request. Calls request.router() and handles the request. Note: request initializers (see request.initialize()) are to be executed by mcp.lua before this function is invoked by mcp.lua.
jbe@215 8
jbe@215 9 --]]--
jbe@210 10
jbe@347 11 function request.handler(http_request)
jbe@212 12 request._http_request = http_request
jbe@215 13 local path = http_request.path
jbe@215 14 if path then
jbe@221 15 local relative_baseurl_elements = {}
jbe@215 16 for match in string.gmatch(path, "/") do
jbe@221 17 relative_baseurl_elements[#relative_baseurl_elements+1] = "../"
jbe@215 18 end
jbe@280 19 if #relative_baseurl_elements > 0 then
jbe@280 20 request._relative_baseurl = table.concat(relative_baseurl_elements)
jbe@280 21 else
jbe@280 22 request._relative_baseurl = "./"
jbe@280 23 end
jbe@215 24 else
jbe@215 25 request._relative_baseurl = nil
jbe@215 26 end
jbe@329 27 request._route = request.router()
jbe@275 28 do
jbe@275 29 local post_id = http_request.post_params["_webmcp_id"]
jbe@275 30 if post_id then
jbe@275 31 request._route.id = post_id
jbe@275 32 end
jbe@275 33 end
jbe@255 34
jbe@255 35 local success, error_info = xpcall(
jbe@255 36 function()
jbe@255 37
jbe@329 38 if not request._route then
jbe@329 39 request._route = {}
jbe@329 40 if request.get_404_route() then
jbe@329 41 request.set_status("404 Not Found")
jbe@329 42 request.forward(request.get_404_route())
jbe@329 43 else
jbe@329 44 error("Could not route request URL")
jbe@329 45 end
jbe@329 46 end
jbe@329 47
jbe@255 48 if request._route.static then
jbe@358 49 local subpath = request._route.static
jbe@358 50 for element in string.gmatch(subpath, "[^/]+") do
jbe@358 51 if element == "." or element == ".." then
jbe@358 52 subpath = nil
jbe@358 53 break
jbe@358 54 end
jbe@358 55 end
jbe@347 56 local fstat, f, errmsg
jbe@358 57 if subpath then
jbe@358 58 local filename = WEBMCP_BASE_PATH .. "static/" .. subpath
jbe@358 59 fstat, errmsg = extos.stat(filename)
jbe@358 60 if fstat then
jbe@358 61 if fstat.isdir then
jbe@358 62 errmsg = "Is a directory"
jbe@358 63 elseif not fstat.isreg then
jbe@358 64 errmsg = "Not a regular file"
jbe@358 65 else
jbe@358 66 f, errmsg = io.open(filename, "r")
jbe@358 67 end
jbe@347 68 end
jbe@347 69 end
jbe@270 70 if not f then
jbe@270 71 if request.get_404_route() then
jbe@329 72 request.set_status("404 Not Found")
jbe@270 73 request.forward(request.get_404_route())
jbe@270 74 else
jbe@358 75 error('Could not open static file "' .. subpath .. '": ' .. errmsg)
jbe@270 76 end
jbe@327 77 else
jbe@327 78 local d = assert(f:read("*a"))
jbe@327 79 f:close()
jbe@327 80 slot.put_into("data", d)
jbe@358 81 local filename_extension = string.match(subpath, "%.([^.]+)$")
jbe@327 82 slot.set_layout(nil, request._mime_types[filename_extension] or "application/octet-stream")
jbe@327 83 request.allow_caching()
jbe@327 84 return
jbe@270 85 end
jbe@255 86 end
jbe@255 87
jbe@255 88 -- restore slots if coming from http redirect
jbe@327 89 do
jbe@327 90 local tempstore_value = http_request.get_params["_tempstore"]
jbe@327 91 if tempstore_value then
jbe@327 92 trace.restore_slots{}
jbe@327 93 local blob = tempstore.pop(tempstore_value)
jbe@327 94 if blob then slot.restore_all(blob) end
jbe@327 95 end
jbe@255 96 end
jbe@255 97
jbe@255 98 if request.get_action() then
jbe@255 99 trace.request{
jbe@255 100 module = request.get_module(),
jbe@255 101 action = request.get_action()
jbe@255 102 }
jbe@255 103 if
jbe@352 104 not execute.action{
jbe@352 105 module = request.get_module(),
jbe@352 106 action = request.get_action(),
jbe@352 107 test_existence = true
jbe@358 108 } and
jbe@358 109 request.get_404_route()
jbe@255 110 then
jbe@255 111 request.set_status("404 Not Found")
jbe@255 112 request.forward(request.get_404_route())
jbe@255 113 else
jbe@255 114 if http_request.method ~= "POST" then
jbe@255 115 request.set_status("405 Method Not Allowed")
jbe@255 116 request.add_header("Allow", "POST")
jbe@255 117 error("Tried to invoke an action with a GET request.")
jbe@255 118 end
jbe@255 119 local action_status = execute.filtered_action{
jbe@255 120 module = request.get_module(),
jbe@255 121 action = request.get_action(),
jbe@255 122 }
jbe@255 123 if not request.is_rerouted() then
jbe@255 124 local routing_mode, routing_module, routing_view, routing_anchor
jbe@255 125 routing_mode = http_request.post_params["_webmcp_routing." .. action_status .. ".mode"]
jbe@255 126 routing_module = http_request.post_params["_webmcp_routing." .. action_status .. ".module"]
jbe@255 127 routing_view = http_request.post_params["_webmcp_routing." .. action_status .. ".view"]
jbe@255 128 routing_anchor = http_request.post_params["_webmcp_routing." .. action_status .. ".anchor"]
jbe@255 129 if not (routing_mode or routing_module or routing_view) then
jbe@255 130 action_status = "default"
jbe@255 131 routing_mode = http_request.post_params["_webmcp_routing.default.mode"]
jbe@255 132 routing_module = http_request.post_params["_webmcp_routing.default.module"]
jbe@255 133 routing_view = http_request.post_params["_webmcp_routing.default.view"]
jbe@255 134 routing_anchor = http_request.post_params["_webmcp_routing.default.anchor"]
jbe@255 135 end
jbe@255 136 assert(routing_module, "Routing information has no module.")
jbe@255 137 assert(routing_view, "Routing information has no view.")
jbe@255 138 if routing_mode == "redirect" then
jbe@255 139 local routing_params = {}
jbe@255 140 for key, value in pairs(request.get_param_strings{ method="POST", include_internal=true }) do
jbe@255 141 local status, stripped_key = string.match(
jbe@255 142 key, "^_webmcp_routing%.([^%.]*)%.params%.(.*)$"
jbe@255 143 )
jbe@255 144 if status == action_status then
jbe@255 145 routing_params[stripped_key] = value
jbe@255 146 end
jbe@255 147 end
jbe@255 148 request.redirect{
jbe@255 149 module = routing_module,
jbe@255 150 view = routing_view,
jbe@255 151 id = http_request.post_params["_webmcp_routing." .. action_status .. ".id"],
jbe@255 152 params = routing_params,
jbe@255 153 anchor = routing_anchor
jbe@255 154 }
jbe@255 155 elseif routing_mode == "forward" then
jbe@255 156 request.forward{ module = routing_module, view = routing_view }
jbe@255 157 else
jbe@255 158 error("Missing or unknown routing mode in request parameters.")
jbe@255 159 end
jbe@255 160 end
jbe@255 161 end
jbe@255 162 else
jbe@255 163 -- no action
jbe@255 164 trace.request{
jbe@255 165 module = request.get_module(),
jbe@255 166 view = request.get_view()
jbe@255 167 }
jbe@255 168 if
jbe@352 169 not execute.view{
jbe@352 170 module = request.get_module(),
jbe@352 171 view = request.get_view(),
jbe@352 172 test_existence = true
jbe@358 173 } and request.get_404_route()
jbe@255 174 then
jbe@255 175 request.set_status("404 Not Found")
jbe@255 176 request.forward(request.get_404_route())
jbe@255 177 end
jbe@255 178 end
jbe@255 179
jbe@255 180 if not request.get_redirect_data() then
jbe@255 181 request.process_forward()
jbe@255 182 local view = request.get_view()
jbe@255 183 if string.find(view, "^_") then
jbe@255 184 error("Tried to call a private view (prefixed with underscore).")
jbe@255 185 end
jbe@255 186 execute.filtered_view{
jbe@255 187 module = request.get_module(),
jbe@255 188 view = view,
jbe@255 189 }
jbe@255 190 end
jbe@255 191
jbe@255 192 end,
jbe@255 193
jbe@255 194 function(errobj)
jbe@255 195 return {
jbe@255 196 errobj = errobj,
jbe@255 197 stacktrace = string.gsub(
jbe@255 198 debug.traceback('', 2),
jbe@255 199 "^\r?\n?stack traceback:\r?\n?", ""
jbe@255 200 )
jbe@255 201 }
jbe@255 202 end
jbe@255 203 )
jbe@255 204
jbe@255 205 if not success then trace.error{} end
jbe@255 206
jbe@255 207 slot.select('trace', trace.render) -- render trace information
jbe@255 208
jbe@255 209 local redirect_data = request.get_redirect_data()
jbe@255 210
jbe@255 211 -- log error and switch to error layout, unless success
jbe@255 212 if not success then
jbe@255 213 local errobj = error_info.errobj
jbe@255 214 local stacktrace = error_info.stacktrace
jbe@255 215 if not request._status then
jbe@255 216 request._status = "500 Internal Server Error"
jbe@255 217 end
jbe@328 218 http_request:close_after_finish()
jbe@255 219 slot.set_layout('system_error')
jbe@255 220 slot.select('system_error', function()
jbe@255 221 if getmetatable(errobj) == mondelefant.errorobject_metatable then
jbe@255 222 slot.put(
jbe@255 223 "<p>Database error of class <b>",
jbe@255 224 encode.html(errobj.code),
jbe@255 225 "</b> occured:<br/><b>",
jbe@255 226 encode.html(errobj.message),
jbe@255 227 "</b></p>"
jbe@255 228 )
jbe@255 229 else
jbe@255 230 slot.put("<p><b>", encode.html(tostring(errobj)), "</b></p>")
jbe@255 231 end
jbe@255 232 slot.put("<p>Stack trace follows:<br/>")
jbe@255 233 slot.put(encode.html_newlines(encode.html(stacktrace)))
jbe@255 234 slot.put("</p>")
jbe@255 235 end)
jbe@255 236 elseif redirect_data then
jbe@267 237 redirect_data = table.new(redirect_data)
jbe@267 238 redirect_data.params = table.new(redirect_data.params)
jbe@255 239 local slot_dump = slot.dump_all()
jbe@255 240 if slot_dump ~= "" then
jbe@312 241 redirect_data.params._tempstore = tempstore.save(slot_dump)
jbe@255 242 end
jbe@255 243 http_request:send_status("303 See Other")
jbe@264 244 for i, header in ipairs(request._response_headers) do
jbe@264 245 http_request:send_header(header[1], header[2])
jbe@264 246 end
jbe@267 247 http_request:send_header("Location", encode.url(redirect_data))
jbe@255 248 http_request:finish()
jbe@255 249 end
jbe@255 250
jbe@255 251 if not success or not redirect_data then
jbe@255 252
jbe@255 253 http_request:send_status(request._status or "200 OK")
jbe@255 254 for i, header in ipairs(request._response_headers) do
jbe@255 255 http_request:send_header(header[1], header[2])
jbe@255 256 end
jbe@291 257 if not request._cache_manual then
jbe@291 258 local cache_time = request._cache_time
jbe@291 259 if request._cache and cache_time and cache_time > 0 then
jbe@291 260 http_request:send_header("Cache-Control", "max-age=" .. cache_time)
jbe@291 261 else
jbe@291 262 http_request:send_header("Cache-Control", "no-cache")
jbe@291 263 end
jbe@291 264 end
jbe@255 265 http_request:send_header("Content-Type", slot.get_content_type())
jbe@255 266 http_request:send_data(slot.render_layout())
jbe@255 267 http_request:finish()
jbe@255 268 end
jbe@255 269
jbe@327 270 return success
jbe@327 271
jbe@215 272 end

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