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 = os.getenv("SCRIPT_NAME") .. "/%s/%s/%s"
  58         redirect(pattern:format(category, module, action), ...)
  59 end
  60
  61
  62 -- Gets form value from key
  63 function formvalue(key, default)
  64         local c = formvalues()
  65
  66         for match in key:gmatch("[%w-_]+") do
  67                 c = c[match]
  68                 if c == nil then
  69                         return default
  70                 end
  71         end
  72
  73         return c
  74 end
  75
  76
  77 -- Returns a table of all COOKIE, GET and POST Parameters
  78 function formvalues()
  79         return FORM
  80 end
  81
  82
  83 -- Prints plaintext content-type header
  84 function textheader()
  85         print("Content-Type: text/plain\n")
  86 end
  87
  88
  89 -- Prints html content-type header
  90 function htmlheader()
  91         print("Content-Type: text/html\n")
  92 end
  93
  94
  95 -- Prints xml content-type header
  96 function xmlheader()
  97         print("Content-Type: text/xml\n")
  98 end