Description:
HTTP-Header manipulator and form variable preprocessor
-FileId:
-$Id$
-
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
+You may obtain a copy of the License at
- http://www.apache.org/licenses/LICENSE-2.0
+ 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,
]]--
-module("luci.http", package.seeall)
-require("ltn12")
-require("luci.http.protocol")
-require("luci.util")
+local ltn12 = require "luci.ltn12"
+local protocol = require "luci.http.protocol"
+local util = require "luci.util"
+local string = require "string"
+local coroutine = require "coroutine"
+local table = require "table"
+
+local ipairs, pairs, next, type, tostring, error =
+ ipairs, pairs, next, type, tostring, error
-context = luci.util.threadlocal()
+--- LuCI Web Framework high-level HTTP functions.
+module "luci.http"
+context = util.threadlocal()
-Request = luci.util.class()
+Request = util.class()
function Request.__init__(self, env, sourcein, sinkerr)
self.input = sourcein
self.error = sinkerr
-- File handler
self.filehandler = function() end
-
+
-- HTTP-Message table
self.message = {
env = env,
headers = {},
- params = luci.http.protocol.urldecode_params(env.QUERY_STRING or ""),
+ params = protocol.urldecode_params(env.QUERY_STRING or ""),
}
-
+
self.parsed_input = false
end
-function Request.formvalue(self, name, default)
- if not self.parsed_input then
+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
function Request.formvaluetable(self, prefix)
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
vals[k:sub(#prefix + 1)] = tostring(v)
end
end
-
+
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 = cookies:find(p)
+ local i, j, value = c:find(p)
return value and urldecode(value)
end
end
function Request._parse_input(self)
- luci.http.protocol.parse_message_body(
+ 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
coroutine.yield(3)
end
-
+
if not context.closed then
context.closed = true
coroutine.yield(5)
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)
- header("Content-Type", mime)
+ if not context.headers or not context.headers["content-type"] then
+ 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
+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
+--- Splice data from a filedescriptor to the client.
+-- @param fp File descriptor
+-- @param size Bytes to splice (optional)
+function splice(fd, size)
+ coroutine.yield(6, fd, size)
+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
-function build_querystring(table)
- local s="?"
-
- for k, v in pairs(table) do
- s = s .. urlencode(k) .. "=" .. urlencode(v) .. "&"
+--- 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(q)
+ local s = { "?" }
+
+ for k, v in pairs(q) do
+ if #s > 1 then s[#s+1] = "&" end
+
+ s[#s+1] = urldecode(k)
+ s[#s+1] = "="
+ s[#s+1] = urldecode(v)
end
-
- return s
+
+ return table.concat(s, "")
end
-urldecode = luci.http.protocol.urldecode
-urlencode = luci.http.protocol.urlencode
+--- 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 = protocol.urldecode
+
+--- Return the URL-encoded equivalent of a string.
+-- @param str Source string
+-- @return URL-encoded string
+-- @see urldecode
+urlencode = protocol.urlencode
+
+--- Send the given data as JSON encoded string.
+-- @param data Data to send
+function write_json(x)
+ if x == nil then
+ write("null")
+ elseif type(x) == "table" then
+ local k, v
+ if type(next(x)) == "number" then
+ write("[ ")
+ for k, v in ipairs(x) do
+ write_json(v)
+ if next(x, k) then
+ write(", ")
+ end
+ end
+ write(" ]")
+ else
+ write("{ ")
+ for k, v in pairs(x) do
+ write("%q: " % k)
+ write_json(v)
+ if next(x, k) then
+ write(", ")
+ end
+ end
+ write(" }")
+ end
+ elseif type(x) == "number" or type(x) == "boolean" then
+ if (x ~= x) then
+ -- NaN is the only value that doesn't equal to itself.
+ write("Number.NaN")
+ else
+ write(tostring(x))
+ end
+ else
+ write('"%s"' % tostring(x):gsub('["%z\1-\31]', function(c)
+ return '\\u%04x' % c:byte(1)
+ end))
+ end
+end
projects / project / luci.git / blobdiff