Attempt to not throw exception on server socket error

[vchess.git] / sockets.js

diff --git a/sockets.js b/sockets.js
index 820a88c..452cb6e 100644 (file)
--- a/sockets.js
+++ b/sockets.js
@@ -8,6 +8,19 @@ module.exports = function(wss) {
        for (const v of Variants)
                clients[v.name] = {};
 
+//     // Safety counter (TODO: is it necessary ?)
+//     setInterval(() => {
+//             Object.keys(clients).forEach(k => {
+//                     Object.keys(clients[k]).forEach(ck => {
+//                             if (!clients[k][ck] || clients[k][ck].readyState != 1)
+//                                     delete clients[k][ck];
+//                     });
+//             });
+//     }, 60000); //every minute (will be lowered if a lot of users...)
+
+       // No-op function as a callback when sending messages
+       const noop = () => { };
+
        wss.on("connection", (socket, req) => {
                const params = new URL("http://localhost" + req.url).searchParams;
                const sid = params.get("sid");
@@ -25,11 +38,11 @@ module.exports = function(wss) {
                {
                        // Send to every client connected on index an update message for counts
                        Object.keys(clients["index"]).forEach( k => {
-                               clients["index"][k].send(JSON.stringify({code:"increase",vname:page}));
+                               clients["index"][k].send(JSON.stringify({code:"increase",vname:page}), noop);
                        });
                        // Also notify potential opponents: hit all clients which check if sid corresponds
                        Object.keys(clients[page]).forEach( k => {
-                               clients[page][k].send(JSON.stringify({code:"connect",id:sid}));
+                               clients[page][k].send(JSON.stringify({code:"connect",id:sid}), noop);
                        });
                        socket.on("message", objtxt => {
                                let obj = JSON.parse(objtxt);
@@ -37,7 +50,10 @@ module.exports = function(wss) {
                                {
                                        case "newmove":
                                                if (!!clients[page][obj.oppid])
-                                                       clients[page][obj.oppid].send(JSON.stringify({code:"newmove",move:obj.move}));
+                                               {
+                                                       clients[page][obj.oppid].send(
+                                                               JSON.stringify({code:"newmove",move:obj.move}), noop);
+                                               }
                                                break;
                                        case "ping":
                                                if (!!clients[page][obj.oppid])
@@ -48,7 +64,7 @@ module.exports = function(wss) {
                                                {
                                                        const oppId = obj.oppid;
                                                        obj.oppid = sid; //I'm oppid for my opponent
-                                                       clients[page][oppId].send(JSON.stringify(obj));
+                                                       clients[page][oppId].send(JSON.stringify(obj), noop);
                                                }
                                                break;
                                        case "newgame":
@@ -59,16 +75,22 @@ module.exports = function(wss) {
                                                        const fen = games[page]["fen"];
                                                        delete games[page];
                                                        const mycolor = Math.random() < 0.5 ? 'w' : 'b';
-                                                       socket.send(JSON.stringify({code:"newgame",fen:fen,oppid:oppId,color:mycolor}));
+                                                       socket.send(
+                                                               JSON.stringify({code:"newgame",fen:fen,oppid:oppId,color:mycolor}));
                                                        if (!!clients[page][oppId])
-                                                               clients[page][oppId].send(JSON.stringify({code:"newgame",fen:fen,oppid:sid,color:mycolor=="w"?"b":"w"}));
+                                                       {
+                                                               clients[page][oppId].send(
+                                                                       JSON.stringify(
+                                                                               {code:"newgame",fen:fen,oppid:sid,color:mycolor=="w"?"b":"w"}),
+                                                                       noop);
+                                                       }
                                                }
                                                else
                                                        games[page] = {id:sid, fen:obj.fen}; //wait for opponent
                                                break;
                                        case "resign":
                                                if (!!clients[page][obj.oppid])
-                                                       clients[page][obj.oppid].send(JSON.stringify({code:"resign"}));
+                                                       clients[page][obj.oppid].send(JSON.stringify({code:"resign"}), noop);
                                                break;
                                }
                        });
@@ -82,12 +104,12 @@ module.exports = function(wss) {
                        {
                                // Send to every client connected on index an update message for counts
                                Object.keys(clients["index"]).forEach( k => {
-                                       clients["index"][k].send(JSON.stringify({code:"decrease",vname:page}));
+                                       clients["index"][k].send(JSON.stringify({code:"decrease",vname:page}), noop);
                                });
                        }
                        // Also notify potential opponents: hit all clients which check if sid corresponds
                        Object.keys(clients[page]).forEach( k => {
-                               clients[page][k].send(JSON.stringify({code:"disconnect",id:sid}));
+                               clients[page][k].send(JSON.stringify({code:"disconnect",id:sid}), noop);
                        });
                });
        });