修复空消息问题

Author: flaribbit

Readme.md

@@ -28,7 +28,7 @@ end
 * `client.onopen = function()`
 * `client.onmessage = function(message: string)`
 * `client.onerror = function(error: string)`
-* `client.onclose = function()`
+* `client.onclose = function(code: int, reason: string)`
 * `client.status -> int`
 * `client:send(message: string)`
 * `client:close()`

main.lua

@@ -6,8 +6,8 @@ client.onopen = function()
     client:send("hello from love2d")
     client:close()
 end
-client.onclose = function(code, message)
-    print("closecode: "..code..", reason: "..message)
+client.onclose = function(code, reason)
+    print("closecode: "..code..", reason: "..reason)
 end
 
 function love.update()

websocket.lua

@@ -137,6 +137,7 @@ local function read(ws)
         local b = {res:byte(1, 8)}
         length = shl(b[5], 24) + shl(b[6], 16) + shl(b[7], 8) + b[8]
     end
+    if length==0 then return "", head, nil end
     res, err, part = sock:receive(length)
     if part then
         -- incomplete frame
@@ -201,7 +202,7 @@ function _M:update()
             local opcode = band(head, 0x0f)
             local fin = band(head, 0x80)==0x80
             if opcode==OPCODE.CLOSE then
-                if res then
+                if res~="" then
                     local code = shl(res:byte(1), 8) + res:byte(2)
                     self.onclose(code, res:sub(3))
                 else