fixed processing of pages stored on filesystem

lib/single-file/single-file-core.js

@@ -1169,20 +1169,16 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 						if (DomUtil.testValidPath(resourceURL)) {
 							resourceURL = new URL(resourceURL, baseURI).href;
 							if (DomUtil.testValidURL(resourceURL, baseURI)) {
-								try {
-									const { content } = await batchRequest.addURL(resourceURL);
-									if (!content.startsWith(prefixDataURI) && !content.startsWith(PREFIX_DATA_URI_NO_MIMETYPE) && !content.startsWith(PREFIX_DATA_URI_OCTET_STREAM)) {
-										resourceElement.setAttribute(attributeName, EMPTY_IMAGE);
-									}
-									return content + (srcsetValue.w ? " " + srcsetValue.w + "w" : srcsetValue.d ? " " + srcsetValue.d + "x" : "");
-								} catch (error) {
+								const { content } = await batchRequest.addURL(resourceURL);
+								if (!content.startsWith(prefixDataURI) && !content.startsWith(PREFIX_DATA_URI_NO_MIMETYPE) && !content.startsWith(PREFIX_DATA_URI_OCTET_STREAM)) {
 									resourceElement.setAttribute(attributeName, EMPTY_IMAGE);
 								}
+								return content + (srcsetValue.w ? " " + srcsetValue.w + "w" : srcsetValue.d ? " " + srcsetValue.d + "x" : "");
 							} else {
-								resourceElement.setAttribute(attributeName, EMPTY_IMAGE);
+								return "";
 							}
 						} else {
-							resourceElement.setAttribute(attributeName, EMPTY_IMAGE);
+							return "";
 						}
 					}
 				}));
@@ -1198,9 +1194,10 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 	const DATA_URI_PREFIX = "data:";
 	const BLOB_URI_PREFIX = "blob:";
 	const HTTP_URI_PREFIX = /^https?:\/\//;
+	const FILE_URI_PREFIX = /^file:\/\//;
 	const EMPTY_URL = /^https?:\/\/+\s*$/;
 	const ABOUT_BLANK_URI = "about:blank";
-	const NOT_EMPTY_URL = /^https?:\/\/.+/;
+	const NOT_EMPTY_URL = /^(https|file)?:\/\/.+/;
 	const REGEXP_URL_FN = /(url\s*\(\s*'(.*?)'\s*\))|(url\s*\(\s*"(.*?)"\s*\))|(url\s*\(\s*(.*?)\s*\))/gi;
 	const REGEXP_URL_SIMPLE_QUOTES_FN = /^url\s*\(\s*'(.*?)'\s*\)$/i;
 	const REGEXP_URL_DOUBLE_QUOTES_FN = /^url\s*\(\s*"(.*?)"\s*\)$/i;
@@ -1280,7 +1277,7 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 		}
 
 		static testValidURL(resourceURL, baseURI) {
-			return DomUtil.testValidPath(resourceURL, baseURI) && resourceURL.match(HTTP_URI_PREFIX) && resourceURL.match(NOT_EMPTY_URL);
+			return DomUtil.testValidPath(resourceURL, baseURI) && (resourceURL.match(HTTP_URI_PREFIX) || resourceURL.match(FILE_URI_PREFIX)) && resourceURL.match(NOT_EMPTY_URL);
 		}
 
 		static matchImport(stylesheetContent) {