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basic support for sending websocket messages on state changes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| local socket = require'socket' | ||
| local copas = require'copas' | ||
| local tools = require'websocket.tools' | ||
| local frame = require'websocket.frame' | ||
| local handshake = require'websocket.handshake' | ||
| local sync = require'websocket.sync' | ||
| local tconcat = table.concat | ||
| local tinsert = table.insert | ||
|
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| local clients = {} | ||
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| local client = function(sock,protocol) | ||
| local copas = require'copas' | ||
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| local self = {} | ||
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| self.state = 'OPEN' | ||
| self.is_server = true | ||
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| self.sock_send = function(self,...) | ||
| return copas.send(sock,...) | ||
| end | ||
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| self.sock_receive = function(self,...) | ||
| return copas.receive(sock,...) | ||
| end | ||
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| self.sock_close = function(self) | ||
| sock:shutdown() | ||
| sock:close() | ||
| end | ||
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| self = sync.extend(self) | ||
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| self.on_close = function(self) | ||
| clients[protocol][self] = nil | ||
| end | ||
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| self.broadcast = function(self,...) | ||
| for client in pairs(clients[protocol]) do | ||
| if client ~= self then | ||
| client:send(...) | ||
| end | ||
| end | ||
| self:send(...) | ||
| end | ||
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| return self | ||
| end | ||
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| local ws_server_create = function (opts) | ||
| assert(opts and (opts.protocols or opts.default)) | ||
| local on_error = opts.on_error or function(s) print(s) end | ||
| if err then | ||
| print("[XX] error err") | ||
| error(err) | ||
| end | ||
| local protocols = {} | ||
| if opts.protocols then | ||
| for protocol in pairs(opts.protocols) do | ||
| clients[protocol] = {} | ||
| tinsert(protocols,protocol) | ||
| end | ||
| end | ||
| -- true is the 'magic' index for the default handler | ||
| clients[true] = {} | ||
|
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| local self = {} | ||
| self.add_client = function(request, sock, main_handler) | ||
| --local request = {} | ||
| --repeat | ||
| -- -- no timeout used, so should either return with line or err | ||
| -- local line,err = sock:receive('*l') | ||
| -- if line then | ||
| -- request[#request+1] = line | ||
| -- else | ||
| -- sock:close() | ||
| -- if on_error then | ||
| -- on_error('invalid request') | ||
| -- end | ||
| -- return | ||
| -- end | ||
| --until line == '' | ||
| local upgrade_request = tconcat(request,'\r\n') | ||
| print("[XX] REQUEST:") | ||
| print(upgrade_request) | ||
| print("[XX] END OF REQUEST") | ||
| --local status,response,protocol = handshake.accept_upgrade(upgrade_request,protocols) | ||
| local status,response,protocol = pcall(handshake.accept_upgrade, upgrade_request,protocols) | ||
| if not status then | ||
| print("[XX] error: Client request does not appear to be a websocket\n") | ||
| --copas.send(sock,protocol) | ||
| --sock:close() | ||
| return nil, "Client request does not appear to be a websocket" | ||
| end | ||
| copas.send(sock,response) | ||
| local handler | ||
| local new_client | ||
| local protocol_index | ||
| if protocol and opts.protocols[protocol] then | ||
| protocol_index = protocol | ||
| handler = opts.protocols[protocol] | ||
| elseif opts.default then | ||
| -- true is the 'magic' index for the default handler | ||
| protocol_index = true | ||
| handler = opts.default | ||
| else | ||
| sock:close() | ||
| if on_error then | ||
| on_error('bad protocol, and no default set') | ||
| end | ||
| return nil, 'Unknown protocol and no default protocol set' | ||
| end | ||
| new_client = client(sock,protocol_index) | ||
| clients[protocol_index][new_client] = true | ||
| --handler(new_client) | ||
| print("[XX] ADD TO SERVER") | ||
| main_handler:do_add_ws_c(new_client) | ||
| print("[XX] ADDED TO SERVER") | ||
| -- this is a dirty trick for preventing | ||
| -- copas from automatically and prematurely closing | ||
| -- the socket | ||
| while new_client.state ~= 'CLOSED' do | ||
| local dummy = { | ||
| send = function() end, | ||
| close = function() end | ||
| } | ||
| copas.send(dummy) | ||
| end | ||
| return true | ||
| end | ||
|
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| self.close = function(_,keep_clients) | ||
| --copas.removeserver(listener) | ||
| listener = nil | ||
| if not keep_clients then | ||
| for protocol,clients in pairs(clients) do | ||
| for client in pairs(clients) do | ||
| client:close() | ||
| end | ||
| end | ||
| end | ||
| end | ||
| return self | ||
| end | ||
|
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| local _M = {} | ||
| _M.ws_server_create = ws_server_create | ||
| return _M | ||
|
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| --return { | ||
| -- ws_server_create = ws_server_create | ||
| --} |