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--[[
LuCI - HTTP-Interaction
Description:
HTTP-Header manipulator and form variable preprocessor
FileId:
$Id$
ToDo:
- Cookie handling
License:
Copyright 2008 Steven Barth <steven@midlink.org>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
]]--
module("luci.http", package.seeall)
require("luci.http.protocol")
require("luci.util")
context = luci.util.threadlocal()
Request = luci.util.class()
function Request.__init__(self, env, instream, errstream)
self.input = instream
self.error = errstream
-- Provide readline function
self.inputreader = self.input.readline
or self.input.read and function() return self.input:read() end
or self.input.receive and function() return self.input:receive() end
or function() return nil end
-- File handler
self.filehandler = function() end
-- HTTP-Message table
self.message = {
env = env,
headers = {},
params = luci.http.protocol.urldecode_params("?"..(env.QUERY_STRING or "")),
}
setmetatable(self.message.params, {__index =
function(tbl, key)
luci.http.protocol.parse_message_body(
self.inputreader,
self.message,
self.filehandler
)
setmetatable(tbl, nil)
return rawget(tbl, key)
end
})
end
function Request.formvalue(self, name, default)
if name then
return self.message.params[name] and tostring(self.message.params[name]) or default
else
return self.message.params
end
end
function Request.formvaluetable(self, prefix)
local vals = {}
prefix = prefix and prefix .. "." or "."
local void = self.message.params[nil]
for k, v in pairs(self.message.params) do
if k:find(prefix, 1, true) == 1 then
vals[k:sub(#prefix + 1)] = tostring(v)
end
end
return vals
end
function Request.getenv(self, name)
return name and self.message.env[name] or self.message.env
end
function Request.setfilehandler(self, callback)
self.filehandler = callback
end
function close()
if not context.eoh then
context.eoh = true
coroutine.yield(3)
end
if not context.closed then
context.closed = true
coroutine.yield(5)
end
end
function formvalue(...)
return context.request:formvalue(...)
end
function formvaluetable(...)
return context.request:formvaluetable(...)
end
function getvalue(...)
return context.request:getvalue(...)
end
function postvalue(...)
return context.request:postvalue(...)
end
function getenv(...)
return context.request:getenv(...)
end
function setfilehandler(...)
return context.request:setfilehandler(...)
end
function header(key, value)
if not context.status then
status()
end
if not context.headers then
context.headers = {}
end
context.headers[key:lower()] = value
coroutine.yield(2, key, value)
end
function prepare_content(mime)
header("Content-Type", mime)
end
function status(code, message)
code = code or 200
message = message or "OK"
context.status = code
coroutine.yield(1, code, message)
end
function write(content)
if not content or #content == 0 then
return
end
if not context.eoh then
if not context.status then
status()
end
if not context.headers or not context.headers["content-type"] then
header("Content-Type", "text/html; charset=utf-8")
end
context.eoh = true
coroutine.yield(3)
end
coroutine.yield(4, content)
end
function basic_auth(realm, errorpage)
header("Status", "401 Unauthorized")
header("WWW-Authenticate", string.format('Basic realm="%s"', realm or ""))
if errorpage then
errorpage()
end
close()
end
function redirect(url)
header("Status", "302 Found")
header("Location", url)
close()
end
function build_querystring(table)
local s="?"
for k, v in pairs(table) do
s = s .. urlencode(k) .. "=" .. urlencode(v) .. "&"
end
return s
end
urldecode = luci.http.protocol.urldecode
urlencode = luci.http.protocol.urlencode
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