libs/lucid-http/luasrc/lucid/http/handler/luci.lua

   1 --[[
   2 LuCId HTTP-Slave
   3 (c) 2009 Steven Barth <steven@midlink.org>
   4
   5 Licensed under the Apache License, Version 2.0 (the "License");
   6 you may not use this file except in compliance with the License.
   7 You may obtain a copy of the License at
   8
   9         http://www.apache.org/licenses/LICENSE-2.0
  10
  11 $Id$
  12 ]]--
  13
  14 local dsp = require "luci.dispatcher"
  15 local util = require "luci.util"
  16 local http = require "luci.http"
  17 local ltn12 = require "luci.ltn12"
  18 local srv = require "luci.lucid.http.server"
  19 local coroutine = require "coroutine"
  20 local type = type
  21
  22 --- LuCI web handler
  23 -- @cstyle instance
  24 module "luci.lucid.http.handler.luci"
  25
  26 --- Create a LuCI web handler.
  27 -- @class function
  28 -- @param name Name
  29 -- @param prefix Dispatching prefix
  30 -- @return LuCI web handler object
  31 Luci = util.class(srv.Handler)
  32
  33 function Luci.__init__(self, name, prefix)
  34         srv.Handler.__init__(self, name)
  35         self.prefix = prefix
  36         dsp.indexcache = "/tmp/luci-indexcache"
  37 end
  38
  39 --- Handle a HEAD request.
  40 -- @param request Request object
  41 -- @return status code, header table, response source
  42 function Luci.handle_HEAD(self, ...)
  43         local stat, head = self:handle_GET(...)
  44         return stat, head
  45 end
  46
  47 --- Handle a POST request.
  48 -- @param request Request object
  49 -- @return status code, header table, response source
  50 function Luci.handle_POST(self, ...)
  51         return self:handle_GET(...)
  52 end
  53
  54 --- Handle a GET request.
  55 -- @param request Request object
  56 -- @return status code, header table, response source
  57 function Luci.handle_GET(self, request, sourcein)
  58         local r = http.Request(
  59                 request.env,
  60                 sourcein
  61         )
  62
  63         local res, id, data1, data2 = true, 0, nil, nil
  64         local headers = {}
  65         local status = 200
  66         local active = true
  67
  68         local x = coroutine.create(dsp.httpdispatch)
  69         while not id or id < 3 do
  70                 res, id, data1, data2 = coroutine.resume(x, r, self.prefix)
  71
  72                 if not res then
  73                         status = 500
  74                         headers["Content-Type"] = "text/plain"
  75                         return status, headers, ltn12.source.string(id)
  76                 end
  77
  78                 if id == 1 then
  79                         status = data1
  80                 elseif id == 2 then
  81                         if not headers[data1] then
  82                                 headers[data1] = data2
  83                         elseif type(headers[data1]) ~= "table" then
  84                                 headers[data1] = {headers[data1], data2}
  85                         else
  86                                 headers[data1][#headers[data1]+1] = data2
  87                         end
  88                 end
  89         end
  90
  91         if id == 6 then
  92                 while (coroutine.resume(x)) do end
  93                 return status, headers, srv.IOResource(data1, data2)
  94         end
  95
  96         local function iter()
  97                 local res, id, data = coroutine.resume(x)
  98                 if not res then
  99                         return nil, id
 100                 elseif not id or not active then
 101                         return true
 102                 elseif id == 5 then
 103                         active = false
 104                         while (coroutine.resume(x)) do end
 105                         return nil
 106                 elseif id == 4 then
 107                         return data
 108                 end
 109         end
 110
 111         return status, headers, iter
 112 end
 113