add ws/wss server and client support

examples/simplewebsocket.lua

@@ -0,0 +1,90 @@
+local skynet = require "skynet"
+local socket = require "skynet.socket"
+local service = require "skynet.service"
+local websocket = require "http.websocket"
+
+local handle = {}
+local MODE = ...
+
+if MODE == "agent" then
+    function handle.connect(id)
+        print("ws connect from: " .. tostring(id))
+    end
+
+    function handle.handshake(id, header)
+        print("ws handshake from: " .. tostring(id))
+        print("----header-----")
+        for k,v in pairs(header) do
+            print(k,v)
+        end
+        print("--------------")
+    end
+
+    function handle.message(id, msg)
+        websocket.write(id, msg)
+    end
+
+    function handle.ping(id)
+        print("ws ping from: " .. tostring(id) .. "\n")
+    end
+
+    function handle.pong(id)
+        print("ws pong from: " .. tostring(id))
+    end
+
+    function handle.close(id, code, reason)
+        print("ws close from: " .. tostring(id), code, reason)
+    end
+
+    function handle.error(id)
+        print("ws error from: " .. tostring(id))
+    end
+
+    skynet.start(function ()
+        skynet.dispatch("lua", function (_,_, id, protocol)
+            websocket.accept(id, handle, protocol)
+        end)
+    end)
+
+else
+    local function simple_echo_client_service(protocol)
+        local skynet = require "skynet"
+        local websocket = require "http.websocket"
+        local url = string.format("%s://127.0.0.1:9948/", protocol)
+        local ws_id = websocket.connect(url)
+        while true do
+            local msg = "hello world!"
+            websocket.write(ws_id, msg)
+            print(">: " .. msg)
+            local resp, close_reason = websocket.read(ws_id)
+            print("<: " .. (resp and resp or "[Close] " .. close_reason))
+            if not resp then
+                print("echo server close.")
+                break
+            end
+            websocket.ping(ws_id)
+            skynet.sleep(100)
+        end
+    end
+
+    skynet.start(function ()
+        local agent = {}
+        for i= 1, 20 do
+            agent[i] = skynet.newservice(SERVICE_NAME, "agent")
+        end
+        local balance = 1
+        local protocol = "ws"
+        local id = socket.listen("0.0.0.0", 9948)
+        skynet.error(string.format("Listen websocket port 9948 protocol:%s", protocol))
+        socket.start(id, function(id, addr)
+            print(string.format("accept client socket_id: %s addr:%s", id, addr))
+            skynet.send(agent[balance], "lua", id, protocol)
+            balance = balance + 1
+            if balance > #agent then
+                balance = 1
+            end
+        end)
+        -- test echo client
+        service.new("websocket_echo_client", simple_echo_client_service, protocol)
+    end)
+end