FileId:
$Id$
-ToDo:
-- Cookie handling
-
License:
Copyright 2008 Steven Barth <steven@midlink.org>
]]--
+--- LuCI Web Framework high-level HTTP functions.
module("luci.http", package.seeall)
-require("ltn12")
+local ltn12 = require("luci.ltn12")
require("luci.http.protocol")
require("luci.util")
context = luci.util.threadlocal()
-
Request = luci.util.class()
function Request.__init__(self, env, sourcein, sinkerr)
self.input = sourcein
params = luci.http.protocol.urldecode_params(env.QUERY_STRING or ""),
}
- setmetatable(self.message.params, {__index =
- function(tbl, key)
- setmetatable(tbl, nil)
-
- luci.http.protocol.parse_message_body(
- self.input,
- self.message,
- self.filehandler
- )
-
- return rawget(tbl, key)
- end
- })
+ self.parsed_input = false
end
-function Request.formvalue(self, name, default)
+function Request.formvalue(self, name, noparse)
+ if not noparse and not self.parsed_input then
+ self:_parse_input()
+ end
+
if name then
- return self.message.params[name] and tostring(self.message.params[name]) or default
+ return self.message.params[name]
else
return self.message.params
end
local vals = {}
prefix = prefix and prefix .. "." or "."
+ if not self.parsed_input then
+ self:_parse_input()
+ end
+
local void = self.message.params[nil]
for k, v in pairs(self.message.params) do
if k:find(prefix, 1, true) == 1 then
return vals
end
+function Request.content(self)
+ if not self.parsed_input then
+ self:_parse_input()
+ end
+
+ return self.message.content, self.message.content_length
+end
+
+function Request.getcookie(self, name)
+ local c = string.gsub(";" .. (self:getenv("HTTP_COOKIE") or "") .. ";", "%s*;%s*", ";")
+ local p = ";" .. name .. "=(.-);"
+ local i, j, value = c:find(p)
+ return value and urldecode(value)
+end
+
function Request.getenv(self, name)
if name then
return self.message.env[name]
self.filehandler = callback
end
+function Request._parse_input(self)
+ luci.http.protocol.parse_message_body(
+ self.input,
+ self.message,
+ self.filehandler
+ )
+ self.parsed_input = true
+end
+--- Close the HTTP-Connection.
function close()
if not context.eoh then
context.eoh = true
end
end
-function formvalue(...)
- return context.request:formvalue(...)
+--- Return the request content if the request was of unknown type.
+-- @return HTTP request body
+-- @return HTTP request body length
+function content()
+ return context.request:content()
end
-function formvaluetable(...)
- return context.request:formvaluetable(...)
+--- Get a certain HTTP input value or a table of all input values.
+-- @param name Name of the GET or POST variable to fetch
+-- @param noparse Don't parse POST data before getting the value
+-- @return HTTP input value or table of all input value
+function formvalue(name, noparse)
+ return context.request:formvalue(name, noparse)
end
-function getvalue(...)
- return context.request:getvalue(...)
+--- Get a table of all HTTP input values with a certain prefix.
+-- @param prefix Prefix
+-- @return Table of all HTTP input values with given prefix
+function formvaluetable(prefix)
+ return context.request:formvaluetable(prefix)
end
-function postvalue(...)
- return context.request:postvalue(...)
+--- Get the value of a certain HTTP-Cookie.
+-- @param name Cookie Name
+-- @return String containing cookie data
+function getcookie(name)
+ return context.request:getcookie(name)
end
-function getenv(...)
- return context.request:getenv(...)
+--- Get the value of a certain HTTP environment variable
+-- or the environment table itself.
+-- @param name Environment variable
+-- @return HTTP environment value or environment table
+function getenv(name)
+ return context.request:getenv(name)
end
-function setfilehandler(...)
- return context.request:setfilehandler(...)
+--- Set a handler function for incoming user file uploads.
+-- @param callback Handler function
+function setfilehandler(callback)
+ return context.request:setfilehandler(callback)
end
+--- Send a HTTP-Header.
+-- @param key Header key
+-- @param value Header value
function header(key, value)
- if not context.status then
- status()
- end
if not context.headers then
context.headers = {}
end
coroutine.yield(2, key, value)
end
+--- Set the mime type of following content data.
+-- @param mime Mimetype of following content
function prepare_content(mime)
+ if mime == "application/xhtml+xml" then
+ if not getenv("HTTP_ACCEPT") or
+ not getenv("HTTP_ACCEPT"):find("application/xhtml+xml", nil, true) then
+ mime = "text/html; charset=UTF-8"
+ end
+ header("Vary", "Accept")
+ end
header("Content-Type", mime)
end
+--- Get the RAW HTTP input source
+-- @return HTTP LTN12 source
+function source()
+ return context.request.input
+end
+
+--- Set the HTTP status code and status message.
+-- @param code Status code
+-- @param message Status message
function status(code, message)
code = code or 200
message = message or "OK"
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()
+--- Send a chunk of content data to the client.
+-- This function is as a valid LTN12 sink.
+-- If the content chunk is nil this function will automatically invoke close.
+-- @param content Content chunk
+-- @param src_err Error object from source (optional)
+-- @see close
+function write(content, src_err)
+ if not content then
+ if src_err then
+ error(src_err)
+ else
+ close()
end
- if not context.headers or not context.headers["content-type"] then
- header("Content-Type", "text/html; charset=utf-8")
+ return true
+ elseif #content == 0 then
+ return true
+ else
+ 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
+ if not context.headers["cache-control"] then
+ header("Cache-Control", "no-cache")
+ header("Expires", "0")
+ end
+
+
+ context.eoh = true
+ coroutine.yield(3)
end
-
- context.eoh = true
- coroutine.yield(3)
+ coroutine.yield(4, content)
+ return true
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
+--- Redirects the client to a new URL and closes the connection.
+-- @param url Target URL
function redirect(url)
- header("Status", "302 Found")
+ status(302, "Found")
header("Location", url)
close()
end
+--- Create a querystring out of a table of key - value pairs.
+-- @param table Query string source table
+-- @return Encoded HTTP query string
function build_querystring(table)
local s="?"
return s
end
+--- Return the URL-decoded equivalent of a string.
+-- @param str URL-encoded string
+-- @param no_plus Don't decode + to " "
+-- @return URL-decoded string
+-- @see urlencode
urldecode = luci.http.protocol.urldecode
+
+--- Return the URL-encoded equivalent of a string.
+-- @param str Source string
+-- @return URL-encoded string
+-- @see urldecode
urlencode = luci.http.protocol.urlencode
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