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mirror of https://git.shadowkat.net/izaya/OC-PsychOS2.git synced 2024-12-25 12:15:26 -05:00
OC-PsychOS2/lib/rpc.lua

80 lines
2.1 KiB
Lua

local serial = require "serialization"
local minitel = require "minitel"
local event = require "event"
local rpc = {}
_G.rpcf = {}
rpc.port = 111
local function rpcexec(_, from, port, data)
if port == rpc.port then
local rpcrq = serial.unserialize(data)
local rpcn, rpcid = table.remove(rpcrq,1), table.remove(rpcrq,1)
if rpcf[rpcn] then
local rt = {pcall(rpcf[rpcn],table.unpack(rpcrq))}
if rt[1] == true then
table.remove(rt,1)
end
minitel.send(from,port,serial.serialize({rpcid,table.unpack(rt)}))
else
end
end
end
function rpcf.list()
local rt = {}
for k,v in pairs(rpcf) do
rt[#rt+1] = k
end
return rt
end
function rpc.call(hostname,fn,...) -- string string -- boolean -- Calls exported function *fn* on host *hostname*, with parameters *...*, returning whatever the function returns, or false.
if hostname == "localhost" then
return rpcf[fn](...)
end
local rv = minitel.genPacketID()
minitel.rsend(hostname,rpc.port,serial.serialize({fn,rv,...}),true)
local st = computer.uptime()
local rt = {}
repeat
local _, from, port, data = event.pull(30, "net_msg", hostname, rpc.port)
rt = serial.unserialize(tostring(data)) or {}
until (type(rt) == "table" and rt[1] == rv) or computer.uptime() > st + 30
if table.remove(rt,1) == rv then
return table.unpack(rt)
end
return false
end
function rpc.proxy(hostname,filter) -- string string -- table -- Returns a component.proxy()-like table from the functions on *hostname* with names matching *filter*.
filter=(filter or "").."(.+)"
local fnames = rpc.call(hostname,"list")
if not fnames then return false end
local rt = {}
for k,v in pairs(fnames) do
fv = v:match(filter)
if fv then
rt[fv] = function(...)
return rpc.call(hostname,v,...)
end
end
end
return rt
end
function rpc.register(name,fn) -- string function -- -- Registers a function to be exported by the RPC library.
local rpcrunning = false
for k,v in pairs(os.tasks()) do
if os.taskInfo(v).name == "rpc daemon" then
rpcrunning = true
end
end
if not rpcrunning then
os.spawn(function()
while true do
rpcexec(event.pull("net_msg"))
end
end,"rpc daemon")
end
rpcf[name] = fn
end
return rpc