1 --[==========================================================================[
2 host.lua: VLC Lua interface command line host module
3 --[==========================================================================[
4 Copyright (C) 2007 the VideoLAN team
7 Authors: Antoine Cellerier <dionoea at videolan dot org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 --]==========================================================================]
24 --[==========================================================================[
30 -- Bypass any authentification
31 function on_password( client )
32 client:switch_status( host.status.read )
34 h.status_callbacks[host.status.password] = on_password
36 h:listen( "localhost:4212" )
37 h:listen( "*console" )
38 --or h:listen( { "localhost:4212", "*console" } )
41 while not vlc.misc.should_die() do
42 -- accept new connections and select active clients
43 local write, read = h:accept_and_select()
45 -- handle clients in write mode
46 for _, client in pairs(write) do
49 client:switch_status( host.status.read )
52 -- handle clients in read mode
53 for _, client in pairs(read) do
54 local str = client:recv(1000)
55 str = string.gsub(str,"\r?\n$","")
56 client.buffer = "Got `"..str.."'.\r\n"
57 client:switch_status( host.status.write )
61 For complete examples see existing VLC Lua interface modules (ie telnet.lua)
62 --]==========================================================================]
64 module("host",package.seeall)
66 status = { init = 0, read = 1, write = 2, password = 3 }
67 client_type = { net = 1, stdio = 2, fifo = 3 }
73 local status_callbacks = {}
76 local fds_read = vlc.net.fd_set_new()
77 local fds_write = vlc.net.fd_set_new()
80 --[[local function client_accept( clients, listen )
87 return listen:accept( wait )
90 local function fd_client( client )
91 if client.status == status.read then
98 local function send( client, data, len )
100 return vlc.net.send( client.wfd, data, len )
102 return vlc.net.send( client.wfd, data or client.buffer )
106 local function recv( client, len )
108 return vlc.net.recv( client.rfd, len )
110 return vlc.net.recv( client.rfd )
114 local function write( client, data )
115 return vlc.net.write( client.wfd, data or client.buffer )
118 local function read( client, len )
120 return vlc.net.read( client.rfd, len )
122 return vlc.net.read( client.rfd )
126 local function del_client( client )
127 if client.type == client_type.stdio then
128 client:send( "Cannot delete stdin/stdout client.\n" )
131 for i, c in pairs(clients) do
133 if client.type == client_type.net then
134 if client.wfd ~= client.rfd then
135 vlc.net.close( client.rfd )
137 vlc.net.close( client.wfd )
143 vlc.msg.err("couldn't find client to remove.")
146 local function switch_status( client, s )
147 if client.status == s then return end
149 if status_callbacks[s] then
150 status_callbacks[s]( client )
154 -- append a line to a client's (output) buffer
155 local function append( client, string )
156 client.buffer = client.buffer .. string .. "\r\n"
159 local function new_client( h, fd, wfd, t )
160 if fd < 0 then return end
162 if t == client_type.net then
165 else if t == client_type.stdio or t == client_type.fifo then
169 error("Unknown client type", t )
171 local client = { -- data
174 status = status.init,
182 switch_status = switch_status,
185 client:send( "VLC media player "..vlc.misc.version().."\n" )
186 table.insert(clients, client)
187 client:switch_status(status.password)
190 function filter_client( fd, status, status2 )
193 for _, client in pairs(clients) do
194 if client.status == status or client.status == status2 then
195 fd:set( client:fd() )
196 l = math.max( l, client:fd() )
203 local function _listen_tcp( h, host, port )
204 if listeners.tcp and listeners.tcp[host]
205 and listeners.tcp[host][port] then
206 error("Already listening on tcp host `"..host..":"..tostring(port).."'")
208 if not listeners.tcp then
211 if not listeners.tcp[host] then
212 listeners.tcp[host] = {}
214 local listener = vlc.net.listen_tcp( host, port )
215 listeners.tcp[host][port] = listener
216 if not listeners.tcp.list then
217 -- FIXME: if host == "list" we'll have a problem
218 listeners.tcp.list = {}
219 local m = { __mode = "v" } -- week values
220 setmetatable( listeners.tcp.list, m )
222 table.insert( listeners.tcp.list, listener )
225 local function _listen_stdio( h )
227 if listeners.stdio then
228 error("Already listening on stdio")
230 new_client( h, 0, 1, client_type.stdio )
231 listeners.stdio = true
234 local function _listen( h, url )
235 if type(url)==type({}) then
236 for _,u in pairs(url) do
240 vlc.msg.info( "Listening on host \""..url.."\"." )
241 if url == "*console" then
244 u = vlc.net.url_parse( url )
245 h:listen_tcp( u.host, u.port )
250 local function _accept_and_select( h, timeout )
251 local nfds = math.max( filter_client( fds_read, status.read, status.password ),
252 filter_client( fds_write, status.write ) ) + 1
253 if listeners.tcp then
254 for _, listener in pairs(listeners.tcp.list) do
255 for _, fd in pairs({listener:fds()}) do
264 local ret = vlc.net.select( nfds, fds_read, fds_write,
269 for _, client in pairs(clients) do
270 if fds_write:isset( client:fd() ) then
271 table.insert(wclients,client)
273 if fds_read:isset( client:fd() ) then
274 table.insert(rclients,client)
277 if listeners.tcp then
278 for _, listener in pairs(listeners.tcp.list) do
279 for _, fd in pairs({listener:fds()}) do
280 if fds_read:isset(fd) then
281 local afd = listener:accept(0)
282 new_client( h, afd, afd, client_type.net )
289 return wclients, rclients
292 local function destructor( h )
294 for _,client in pairs(clients) do
295 client:send("Shutting down.")
296 if client.type == client_type.tcp then
297 if client.wfd ~= client.rfd then
298 vlc.net.close(client.rfd)
300 vlc.net.close(client.wfd)
305 local function _broadcast( h, msg )
306 for _,client in pairs(clients) do
313 status_callbacks = status_callbacks,
316 listen_tcp = _listen_tcp,
317 listen_stdio = _listen_stdio,
318 accept_and_select = _accept_and_select,
319 broadcast = _broadcast,
324 __metatable = "Nothing to see here. Move along.",