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Garry's Mod client-side websockets.
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| local function init_listener_type(obj, browser, name) | |
| local listeners_key = ("%sListeners"):format(name) | |
| local callback_key = ("On%s"):format(name) | |
| local add_listener_key = ("Add%sListener"):format(name) | |
| obj[listeners_key] = {} | |
| obj[callback_key] = function(...) | |
| for _, listener in ipairs(obj[listeners_key]) do | |
| listener(...) | |
| end | |
| end | |
| obj[add_listener_key] = function(self,f) | |
| table.insert(obj[listeners_key], f) | |
| end | |
| browser:AddFunction("LuaWS", callback_key, obj[callback_key]) | |
| browser:QueueJavascript(("WEBSOCKET.on%s = LuaWS.%s;"):format(name:lower(), callback_key)) | |
| end | |
| -- AddMessageListener etc... :V | |
| local console_overrides = { | |
| log = print, | |
| info = print, | |
| error = error, | |
| warn = ErrorNoHalt, | |
| } | |
| return function (adr) | |
| local obj = {} | |
| obj.Address = adr | |
| local browser = vgui.Create("DHTML") | |
| browser.IsChatBackup = true | |
| -- for the sake of having something opened to allow us to use js | |
| browser:SetHTML("<html><body></body></html>") | |
| browser:SetAllowLua(true) | |
| -- bring back muh errors on the lua stack | |
| browser:AddFunction("LuaWS", "Error", function(err) | |
| error(err.message) | |
| end) | |
| browser:QueueJavascript(([[ | |
| try { | |
| var WEBSOCKET = new WebSocket(%q); | |
| } catch (err) { | |
| LuaWS.Error(err); | |
| } | |
| ]]):format(adr:JavascriptSafe())) | |
| for func_name, override in pairs(console_overrides) do | |
| browser:AddFunction("console", func_name, override) | |
| end | |
| init_listener_type(obj, browser, "Open") | |
| init_listener_type(obj, browser, "Close") | |
| init_listener_type(obj, browser, "Message") | |
| init_listener_type(obj, browser, "Error") | |
| function obj:Send(data) | |
| local t = type(data) | |
| if t == "table" then | |
| data = util.TableToJSON(data) | |
| else | |
| data = tostring(data) | |
| end | |
| browser:QueueJavascript(([[ | |
| try { | |
| WEBSOCKET.send(%q); | |
| } catch (err) { | |
| LuaWS.Error(err); | |
| } | |
| ]]):format(data)) | |
| end | |
| function obj:Close() | |
| browser:QueueJavascript([[ | |
| try { | |
| WEBSOCKET.close(); | |
| } catch (err) { | |
| LuaWS.Error(err); | |
| } | |
| ]]) | |
| end | |
| function obj:IsValid() | |
| return browser:IsValid() | |
| end | |
| obj.Browser = browser | |
| return obj | |
| end |
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