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 -- Gets form value from key
  58 function formvalue(key, default)
  59         local c = formvalues()
  60
  61         for match in key:gmatch("%w+") do
  62                 c = c[match]
  63                 if c == nil then
  64                         return default
  65                 end
  66         end
  67
  68         return c
  69 end
  70
  71
  72 -- Returns a table of all COOKIE, GET and POST Parameters
  73 function formvalues()
  74         return FORM
  75 end
  76
  77
  78 -- Prints plaintext content-type header
  79 function textheader()
  80         print("Content-Type: text/plain\n")
  81 end
  82
  83
  84 -- Prints html content-type header
  85 function htmlheader()
  86         print("Content-Type: text/html\n")
  87 end
  88
  89
  90 -- Prints xml content-type header
  91 function xmlheader()
  92         print("Content-Type: text/xml\n")
  93 end