core/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, qs)
  42         if qs then
  43                 url = url .. "?" .. qs
  44         end
  45
  46         status(302, "Found")
  47         print("Location: " .. url .. "\n")
  48 end
  49
  50
  51 -- Same as redirect but accepts category, module and action for internal use
  52 function request_redirect(category, module, action, ...)
  53         category = category or "public"
  54         module   = module   or "index"
  55         action   = action   or "index"
  56
  57         local pattern = script_name() .. "/%s/%s/%s"
  58         redirect(pattern:format(category, module, action), ...)
  59 end
  60
  61
  62 -- Returns the script name
  63 function script_name()
  64         return ENV.SCRIPT_NAME
  65 end
  66
  67
  68 -- Gets form value from key
  69 function formvalue(key, default)
  70         local c = formvalues()
  71
  72         for match in key:gmatch("[%w-_]+") do
  73                 c = c[match]
  74                 if c == nil then
  75                         return default
  76                 end
  77         end
  78
  79         return c
  80 end
  81
  82
  83 -- Returns a table of all COOKIE, GET and POST Parameters
  84 function formvalues()
  85         return FORM
  86 end
  87
  88
  89 -- Prints plaintext content-type header
  90 function textheader()
  91         print("Content-Type: text/plain\n")
  92 end
  93
  94
  95 -- Prints html content-type header
  96 function htmlheader()
  97         print("Content-Type: text/html\n")
  98 end
  99
 100
 101 -- Prints xml content-type header
 102 function xmlheader()
 103         print("Content-Type: text/xml\n")
 104 end