libs/sgi-luci/luasrc/ttpd/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 local dsp = require "luci.dispatcher"
  16 local util = require "luci.util"
  17 local http = require "luci.http"
  18 local ltn12 = require "luci.ltn12"
  19 local mod = require "luci.ttpd.module"
  20 local table = require "table"
  21 local coroutine = require "coroutine"
  22
  23 module "luci.ttpd.handler.luci"
  24
  25 Luci = util.class(mod.Handler)
  26 Response = mod.Response
  27
  28 function Luci.__init__(self, limit)
  29         mod.Handler.__init__(self)
  30 end
  31
  32 function Luci.handle_head(self, ...)
  33         return (self:handle_get(...))
  34 end
  35
  36 function Luci.handle_post(self, ...)
  37         return self:handle_get(...)
  38 end
  39
  40 function Luci.handle_get(self, request, sourcein, sinkerr)
  41         local r = http.Request(
  42                 request.env,
  43                 sourcein,
  44                 sinkerr
  45         )
  46
  47         local res, id, data1, data2 = true, 0, nil, nil
  48         local headers = {}
  49         local status = 200
  50         local active = true
  51
  52         local x = coroutine.create(dsp.httpdispatch)
  53         while not id or id < 3 do
  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 or not active then
  75                         return true
  76                 elseif id == 5 then
  77                         active = false
  78
  79                         while (coroutine.resume(x)) do
  80                         end
  81
  82                         return nil
  83                 elseif id == 4 then
  84                         return data
  85                 end
  86                 if coroutine.status(x) == "dead" then
  87                         return nil
  88                 end
  89         end
  90
  91         return Response(status, headers), iter
  92 end