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exponential backoff, part 2

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Jakob Ketterl 2019-07-13 21:44:48 +02:00
parent 9f2b715d9f
commit 420b0c60d7
1 changed files with 11 additions and 1 deletions
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12
htdocs/map.js
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@ -115,10 +115,13 @@
rectangles = {}; rectangles = {};
}; };
var reconnect_timeout = false;
var connect = function(){ var connect = function(){
var ws = new WebSocket(ws_url); var ws = new WebSocket(ws_url);
ws.onopen = function(){ ws.onopen = function(){
ws.send("SERVER DE CLIENT client=map.js type=map"); ws.send("SERVER DE CLIENT client=map.js type=map");
reconnect_timeout = false
}; };
ws.onmessage = function(e){ ws.onmessage = function(e){
@ -163,7 +166,14 @@
}; };
ws.onclose = function(){ ws.onclose = function(){
clearMap(); clearMap();
setTimeout(connect, 5000); if (reconnect_timeout) {
// max value: roundabout 8 and a half minutes
reconnect_timeout = Math.min(reconnect_timeout * 2, 512000);
} else {
// initial value: 1s
reconnect_timeout = 1000;
}
setTimeout(connect, reconnect_timeout);
}; };
window.onbeforeunload = function() { //http://stackoverflow.com/questions/4812686/closing-websocket-correctly-html5-javascript window.onbeforeunload = function() { //http://stackoverflow.com/questions/4812686/closing-websocket-correctly-html5-javascript