src/ffluci/http.lua

   1 --[[
   2 FFLuCI - HTTP-Interaction
   3
   4 Description:
   5 HTTP-Header manipulator and form variable preprocessor
   6
   7 FileId:
   8 $Id$
   9
  10 ToDo:
  11 - Cookie handling
  12
  13 License:
  14 Copyright 2008 Steven Barth <steven@midlink.org>
  15
  16 Licensed under the Apache License, Version 2.0 (the "License");
  17 you may not use this file except in compliance with the License.
  18 You may obtain a copy of the License at
  19
  20         http://www.apache.org/licenses/LICENSE-2.0
  21
  22 Unless required by applicable law or agreed to in writing, software
  23 distributed under the License is distributed on an "AS IS" BASIS,
  24 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  25 See the License for the specific language governing permissions and
  26 limitations under the License.
  27
  28 ]]--
  29
  30 module("ffluci.http", package.seeall)
  31
  32 require("ffluci.util")
  33
  34 -- Sets HTTP-Status-Header
  35 function status(code, message)
  36         print("Status: " .. tostring(code) .. " " .. message)
  37 end
  38
  39
  40 -- Asks the browser to redirect to "url"
  41 function redirect(url)
  42         status(302, "Found")
  43         print("Location: " .. url .. "\n")
  44 end
  45
  46
  47 -- Same as redirect but accepts category, module and action for internal use
  48 function request_redirect(category, module, action)
  49         category = category or "public"
  50         module   = module   or "index"
  51         action   = action   or "index"
  52
  53         local pattern = os.getenv("SCRIPT_NAME") .. "/%s/%s/%s"
  54         redirect(pattern:format(category, module, action))
  55 end
  56
  57
  58 -- Gets form value from key
  59 function formvalue(key, default)
  60         local c = formvalues()
  61
  62         for match in key:gmatch("%w+") do
  63                 c = c[match]
  64                 if c == nil then
  65                         return default
  66                 end
  67         end
  68
  69         return c
  70 end
  71
  72
  73 -- Returns a table of all COOKIE, GET and POST Parameters
  74 function formvalues()
  75         return FORM
  76 end
  77
  78
  79 -- Prints plaintext content-type header
  80 function textheader()
  81         print("Content-Type: text/plain\n")
  82 end
  83
  84
  85 -- Prints html content-type header
  86 function htmlheader()
  87         print("Content-Type: text/html\n")
  88 end
  89
  90
  91 -- Prints xml content-type header
  92 function xmlheader()
  93         print("Content-Type: text/xml\n")
  94 end