+--[[
+
+HTTP server implementation for LuCI - luci handler
+(c) 2008 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+
+]]--
+
module("luci.httpd.handler.luci", package.seeall)
+
require("luci.dispatcher")
require("luci.http")
-require("ltn12")
+require("luci.http.protocol.date")
+local ltn12 = require("luci.ltn12")
Luci = luci.util.class(luci.httpd.module.Handler)
Response = luci.httpd.module.Response
-function Luci.__init__(self)
+function Luci.__init__(self, limit)
luci.httpd.module.Handler.__init__(self)
+ self.limit = limit or 5
+ self.running = {}
+ setmetatable(self.running, {__mode = "v"})
end
function Luci.handle_head(self, ...)
local response, sourceout = self:handle_get(...)
+ self.running = self.running - 1
return response
end
return self:handle_get(...)
end
-function Luci.handle_get(self, request, sourcein, sinkerr)
+function Luci.handle_get(self, request, sourcein, sinkerr)
+ if self.limit and #self.running >= self.limit then
+ return self:failure(503, "Overload")
+ end
+ table.insert(self.running, coroutine.running())
+
local r = luci.http.Request(
request.env,
sourcein,
sinkerr
)
-
+
local res, id, data1, data2 = true, 0, nil, nil
local headers = {}
local status = 200
-
+
local x = coroutine.create(luci.dispatcher.httpdispatch)
while not id or id < 3 do
coroutine.yield()
-
+
res, id, data1, data2 = coroutine.resume(x, r)
-
+
if not res then
status = 500
headers["Content-Type"] = "text/plain"
local err = {id}
- return status, headers, function() local x = table.remove(err) return x end
+ self.running = self.running - 1
+ return Response( status, headers ), function() return table.remove(err) end
end
-
+
if id == 1 then
status = data1
elseif id == 2 then
headers[data1] = data2
end
end
-
+
local function iter()
local res, id, data = coroutine.resume(x)
if not res then
elseif not id then
return true
elseif id == 5 then
- return nil
- else
+ return true
+ elseif id == 4 then
return data
end
+ if coroutine.status(x) == "dead" then
+ return nil
+ end
end
-
+
+ headers["Expires"] = luci.http.protocol.date.to_http( os.time() )
+ headers["Date"] = headers["Expires"]
+ headers["Cache-Control"] = "no-cache"
+
return Response(status, headers), iter
-end
\ No newline at end of file
+end