libs/httpd/luasrc/httpd/handler/luci.lua

   1 --[[
   2
   3 HTTP server implementation for LuCI - luci handler
   4 (c) 2008 Steven Barth <steven@midlink.org>
   5
   6 Licensed under the Apache License, Version 2.0 (the "License");
   7 you may not use this file except in compliance with the License.
   8 You may obtain a copy of the License at
   9
  10         http://www.apache.org/licenses/LICENSE-2.0
  11
  12 $Id$
  13
  14 ]]--
  15
  16 module("luci.httpd.handler.luci", package.seeall)
  17
  18 require("luci.dispatcher")
  19 require("luci.http")
  20 require("luci.http.protocol.date")
  21 local ltn12 = require("luci.ltn12")
  22
  23 Luci = luci.util.class(luci.httpd.module.Handler)
  24 Response = luci.httpd.module.Response
  25
  26 function Luci.__init__(self)
  27         luci.httpd.module.Handler.__init__(self)
  28 end
  29
  30 function Luci.handle_head(self, ...)
  31         local response, sourceout = self:handle_get(...)
  32         return response
  33 end
  34
  35 function Luci.handle_post(self, ...)
  36         return self:handle_get(...)
  37 end
  38
  39 function Luci.handle_get(self, request, sourcein, sinkerr)
  40         local r = luci.http.Request(
  41                 request.env,
  42                 sourcein,
  43                 sinkerr
  44         )
  45
  46         local res, id, data1, data2 = true, 0, nil, nil
  47         local headers = {}
  48         local status = 200
  49
  50         local x = coroutine.create(luci.dispatcher.httpdispatch)
  51         while not id or id < 3 do
  52                 coroutine.yield()
  53
  54                 res, id, data1, data2 = coroutine.resume(x, r)
  55
  56                 if not res then
  57                         status = 500
  58                         headers["Content-Type"] = "text/plain"
  59                         local err = {id}
  60                         return Response( status, headers ), function() return table.remove(err) end
  61                 end
  62
  63                 if id == 1 then
  64                         status = data1
  65                 elseif id == 2 then
  66                         headers[data1] = data2
  67                 end
  68         end
  69
  70         local function iter()
  71                 local res, id, data = coroutine.resume(x)
  72                 if not res then
  73                         return nil, id
  74                 elseif not id then
  75                         return true
  76                 elseif id == 5 then
  77                         return nil
  78                 else
  79                         return data
  80                 end
  81         end
  82
  83         headers["Expires"] = luci.http.protocol.date.to_http( os.time() )
  84         headers["Date"]    = headers["Expires"]
  85         headers["Cache-Control"] = "no-cache"
  86
  87         return Response(status, headers), iter
  88 end