beenull/speedtest
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Improved JS formatting

Browse source
This commit is contained in:
adolfintel 2019-01-25 09:20:13 +01:00
parent 58970adcb8
commit 697b4c85a6
2 changed files with 756 additions and 590 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

147
Frontend/server_selector.js
View file

@ -6,57 +6,66 @@
*/
//pings the specified URL, then calls the function result. Result will receive a parameter which is either the time it took to ping the URL, or -1 if something went wrong.
var PING_TIMEOUT=1000;
var USE_PING_TIMEOUT=true; //will be disabled on unsupported browsers
if(/MSIE.(\d+\.\d+)/i.test(navigator.userAgent)){ //IE11 doesn't support XHR timeout
USE_PING_TIMEOUT=false;
var PING_TIMEOUT = 1000;
var USE_PING_TIMEOUT = true; //will be disabled on unsupported browsers
if (/MSIE.(\d+\.\d+)/i.test(navigator.userAgent)) {
//IE11 doesn't support XHR timeout
USE_PING_TIMEOUT = false;
}
function ping(url,result){
var xhr=new XMLHttpRequest();
var t=new Date().getTime();
xhr.onload=function(){
if(xhr.responseText.length==0){ //we expect an empty response
var instspd=new Date().getTime()-t; //rough timing estimate
try{
function ping(url, result) {
var xhr = new XMLHttpRequest();
var t = new Date().getTime();
xhr.onload = function() {
if (xhr.responseText.length == 0) {
//we expect an empty response
var instspd = new Date().getTime() - t; //rough timing estimate
try {
//try to get more accurate timing using performance API
var p=performance.getEntries();
p=p[p.length-1];
var d=p.responseStart-p.requestStart;
if(d<=0) d=p.duration;
if(d>0&&d<instspd) instspd=d;
}catch(e){
}
var p = performance.getEntries();
p = p[p.length - 1];
var d = p.responseStart - p.requestStart;
if (d <= 0) d = p.duration;
if (d > 0 && d < instspd) instspd = d;
} catch (e) {}
result(instspd);
}else result(-1);
} else result(-1);
}.bind(this);
xhr.onerror=function(){
xhr.onerror = function() {
result(-1);
}.bind(this);
xhr.open("GET",url);
if(USE_PING_TIMEOUT){
try{
xhr.timeout=PING_TIMEOUT;
xhr.ontimeout=xhr.onerror;
}catch(e){}
xhr.open("GET", url);
if (USE_PING_TIMEOUT) {
try {
xhr.timeout = PING_TIMEOUT;
xhr.ontimeout = xhr.onerror;
} catch (e) {}
}
xhr.send();
}
//this function repeatedly pings a server to get a good estimate of the ping. When it's done, it calls the done function without parameters. At the end of the execution, the server will have a new parameter called pingT, which is either the best ping we got from the server or -1 if something went wrong.
var PINGS=3, //up to 3 pings are performed, unless the server is down...
SLOW_THRESHOLD=500; //...or one of the pings is above this threshold
function checkServer(server,done){
var i=0;
server.pingT=-1;
if(server.server.indexOf(location.protocol)==-1) done(); else{
var nextPing=function(){
if(i++==PINGS){done(); return;}
ping(server.server+server.pingURL,function(t){
if(t>=0){
if(t<server.pingT||server.pingT==-1) server.pingT=t;
if(t<SLOW_THRESHOLD) nextPing(); else done();
}else done();
}.bind(this));
var PINGS = 3, //up to 3 pings are performed, unless the server is down...
SLOW_THRESHOLD = 500; //...or one of the pings is above this threshold
function checkServer(server, done) {
var i = 0;
server.pingT = -1;
if (server.server.indexOf(location.protocol) == -1) done();
else {
var nextPing = function() {
if (i++ == PINGS) {
done();
return;
}
ping(
server.server + server.pingURL,
function(t) {
if (t >= 0) {
if (t < server.pingT || server.pingT == -1) server.pingT = t;
if (t < SLOW_THRESHOLD) nextPing();
else done();
} else done();
}.bind(this)
);
}.bind(this);
nextPing();
}
@ -73,18 +82,21 @@ function checkServer(server,done){
}
For each server, the ping is measured, then the server with the function result is called with the best server, or null if all the servers were down.
*/
function selectServer(serverList,result){
var i=0;
var done=function(){
var bestServer=null;
for(var i=0;i<serverList.length;i++){
if(serverList[i].pingT!=-1&&(bestServer==null||serverList[i].pingT<bestServer.pingT)) bestServer=serverList[i];
function selectServer(serverList, result) {
var i = 0;
var done = function() {
var bestServer = null;
for (var i = 0; i < serverList.length; i++) {
if (serverList[i].pingT != -1 && (bestServer == null || serverList[i].pingT < bestServer.pingT)) bestServer = serverList[i];
}
result(bestServer);
}.bind(this);
var nextServer=function(){
if(i==serverList.length){done(); return;}
checkServer(serverList[i++],nextServer);
var nextServer = function() {
if (i == serverList.length) {
done();
return;
}
checkServer(serverList[i++], nextServer);
}.bind(this);
nextServer();
}
@ -92,24 +104,27 @@ function selectServer(serverList,result){
/*
this function is a faster version of selectServer that tests multiple servers concurrently. Useful for large server lists
*/
var CONCURRENCY=4; //4 seems to be the safest value
function fastSelectServer(serverList,result){
var serverLists=[];
for(var i=0;i<CONCURRENCY;i++){
serverLists[i]=[];
var CONCURRENCY = 4; //4 seems to be the safest value
function fastSelectServer(serverList, result) {
var serverLists = [];
for (var i = 0; i < CONCURRENCY; i++) {
serverLists[i] = [];
}
for(var i=0;i<serverList.length;i++){
serverLists[i%CONCURRENCY].push(serverList[i]);
for (var i = 0; i < serverList.length; i++) {
serverLists[i % CONCURRENCY].push(serverList[i]);
}
var completed=0;
var bestServer=null;
for(var i=0;i<CONCURRENCY;i++){
selectServer(serverLists[i],function(server){
if(server!=null){
if(bestServer==null||server.pingT<bestServer.pingT) bestServer=server;
}
completed++;
if(completed==CONCURRENCY) result(bestServer);
}.bind(this));
var completed = 0;
var bestServer = null;
for (var i = 0; i < CONCURRENCY; i++) {
selectServer(
serverLists[i],
function(server) {
if (server != null) {
if (bestServer == null || server.pingT < bestServer.pingT) bestServer = server;
}
completed++;
if (completed == CONCURRENCY) result(bestServer);
}.bind(this)
);
}
}

1199
Frontend/speedtest_worker.js
View file

File diff suppressed because it is too large Load diff