Prevent querying image limits in background tabs

Chrome's background optimization may lets all background tabs request at the same time, which may makes your IP blocked if you opened too many tabs.
dereksx · Jun 11, 2021 · 3802022 · 3802022
1 parent 0a0647e
commit 3802022
Showing 1 changed file with 54 additions and 34 deletions.
diff --git a/src/main.js b/src/main.js
@@ -24,6 +24,7 @@ var getAllPagesURLFin = false;
 var pretitle = document.title;
 var needTitleStatus = false;
 var delayTime = 0;
+var visibleState = true;
 var fetchPagesXHR = new XMLHttpRequest();
 var emptyAudio;
 var emptyAudioFile = 'data:audio/mp3;base64,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';
@@ -312,6 +313,8 @@ function initSetting() {
 			catch (e) { }
 		}
 
+		initVisibilityListener();
+
 		// Forced request File System to check if have temp archive
 		if (setting['store-in-fs'] && requestFileSystem) {
 			requestFileSystem(window.TEMPORARY, 1024 * 1024 * 1024, ehDownloadFS.initCheckerHandler, ehDownloadFS.errorHandler);
@@ -1914,50 +1917,57 @@ function initEHDownload() {
 	getAllPagesURL();
 
 	// init playing music
-	if (setting['play-silent-music']) {
+	if (setting['play-silent-music'] && !emptyAudio) {
 		emptyAudio = new Audio(emptyAudioFile);
 		emptyAudio.loop = true;
+	}
+}
+
+function initVisibilityListener() {
+	var hidden, visibilityChange;
+	if (typeof document.hidden !== 'undefined') { // Opera 12.10 and Firefox 18 and later support 
+		hidden = 'hidden';
+		visibilityChange = 'visibilitychange';
+	}
+	else if (typeof document.mozHidden !== 'undefined') {
+		hidden = 'mozHidden';
+		visibilityChange = 'mozvisibilitychange';
+	}
+	else if (typeof document.webkitHidden !== 'undefined') {
+		hidden = 'webkitHidden';
+		visibilityChange = 'webkitvisibilitychange';
+	}
 
-		var hidden, visibilityChange;
-		if (typeof document.hidden !== 'undefined') { // Opera 12.10 and Firefox 18 and later support 
-			hidden = 'hidden';
-			visibilityChange = 'visibilitychange';
+	var visibilityChangeHandler = function (isHidden) {
+		if (typeof isHidden !== 'boolean') {
+			isHidden = document[hidden];
 		}
-		else if (typeof document.mozHidden !== 'undefined') {
-			hidden = 'mozHidden';
-			visibilityChange = 'mozvisibilitychange';
+		visibleState = !isHidden;
+		if (!emptyAudio) {
+			return;
 		}
-		else if (typeof document.webkitHidden !== 'undefined') {
-			hidden = 'webkitHidden';
-			visibilityChange = 'webkitvisibilitychange';
-		}
-
-		var visibilityChangeHandler = function(isHidden) {
-			if (typeof isHidden !== 'boolean') {
-				isHidden = document[hidden];
-			}
-			if (isHidden && ((isDownloading && !isPausing) || isSaving)) {
-				emptyAudio.play();
-			}
-			else {
-				emptyAudio.pause();
-			}
-		};
-
-		if (visibilityChange) {
-			window.addEventListener(visibilityChange, visibilityChangeHandler);
+		if (isHidden && ((isDownloading && !isPausing) || isSaving)) {
+			emptyAudio.play();
 		}
 		else {
-			window.addEventListener('focus', function() {
-				visibilityChangeHandler(false);
-			});
-			window.addEventListener('blur', function() {
-				visibilityChangeHandler(true);
-			});
+			emptyAudio.pause();
+			getImageLimits();
 		}
+	};
 
-		visibilityChangeHandler();
+	if (visibilityChange) {
+		window.addEventListener(visibilityChange, visibilityChangeHandler);
+	}
+	else {
+		window.addEventListener('focus', function () {
+			visibilityChangeHandler(false);
+		});
+		window.addEventListener('blur', function () {
+			visibilityChangeHandler(true);
+		});
 	}
+
+	visibilityChangeHandler();
 }
 
 function initProgressTable(){
@@ -2416,6 +2426,9 @@ function showSettings() {
 }
 
 function getImageLimits(forced, host){
+	if (!visibleState) {
+		return;
+	}
 	var host = host || location.hostname;
 	if (host === 'exhentai.org') {
 		host = 'e-hentai.org';
@@ -2440,12 +2453,16 @@ function getImageLimits(forced, host){
 			if (responseText.indexOf('as your account has been suspended') >= 0) {
 				preData.suspended = true;
 			}
+			else if (responseText.indexOf('Your IP address has been temporarily banned') >= 0) {
+				preData.ipBanned = true;
+			}
 			else {
 				var data = responseText.match(ehDownloadRegex.imageLimits);
 				if (!data || data.length < 3) return;
 				preData.cur = data[1];
 				preData.total = data[2];
 				delete preData.suspended;
+				delete preData.ipBanned;
 			}
 			localStorage.setItem('ehd-image-limits-' + host, JSON.stringify(preData));
 			showImageLimits();
@@ -2461,6 +2478,9 @@ function showImageLimits(){
 		if (curData.suspended) {
 			return '<a href="https://forums.e-hentai.org/" target="_blank" style="color: #f00">! Account Suspended !</span>';
 		}
+		if (curData.ipBanned) {
+			return '<a href="https://e-hentai.org/home.php" target="_blank" style="color: #f00">! IP Banned !</span>';
+		}
 		return curData.cur + '/' + curData.total;
 	});