Michael Stapelberg
59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
function newLogrotate(elt) {
|
|
const maxLines = 101;
|
|
var lines = 0;
|
|
return function (e) {
|
|
const line = e.data;
|
|
const txt = elt.innerText + line + "\n";
|
|
lines += line.split("\n").length;
|
|
|
|
var toRemove = lines - maxLines;
|
|
var i = 0;
|
|
while (toRemove-- > 0) {
|
|
i = txt.indexOf("\n", i) + 1;
|
|
lines--;
|
|
}
|
|
elt.innerText = txt.slice(i);
|
|
};
|
|
}
|
|
|
|
var stdout = document.getElementById("stdout");
|
|
var stderr = document.getElementById("stderr");
|
|
var stream = undefined;
|
|
function watch() {
|
|
if (stream !== undefined) {
|
|
console.log('stream still alive');
|
|
return;
|
|
}
|
|
stream = new EventSource("/log?path=" + ServiceName + "&stream=both", {
|
|
withCredentials: true,
|
|
});
|
|
stream.addEventListener('open', (event) => {
|
|
stdout.innerText = '';
|
|
stderr.innerText = '';
|
|
});
|
|
stream.addEventListener('stdout', newLogrotate(stdout));
|
|
stream.addEventListener('stderr', newLogrotate(stderr));
|
|
}
|
|
|
|
function unwatch() {
|
|
if (stream === undefined) {
|
|
return;
|
|
}
|
|
console.log('closing stream');
|
|
stream.close();
|
|
stream = undefined;
|
|
}
|
|
|
|
// Only watch stdout+stderr while the tab is visible.
|
|
document.addEventListener("visibilitychange", () => {
|
|
if (document.hidden) {
|
|
unwatch();
|
|
} else {
|
|
watch();
|
|
}
|
|
});
|
|
|
|
window.addEventListener("unload", unwatch);
|
|
window.addEventListener("pagehide", unwatch);
|
|
window.addEventListener("pageshow", watch);
|