From eb288fb885b0bb8a56e17b0e9396414df6713032 Mon Sep 17 00:00:00 2001
From: Thibaut Girka <thib@sitedethib.com>
Date: Mon, 19 Aug 2019 18:00:10 +0200
Subject: [PATCH 1/2] Add option not to use a blob: URL for the worker source

---
 src/browser/index.js          | 5 +++--
 src/common/TesseractWorker.js | 1 +
 src/common/options.js         | 1 +
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/browser/index.js b/src/browser/index.js
index c9fd31b66..06e62ab5d 100644
--- a/src/browser/index.js
+++ b/src/browser/index.js
@@ -124,10 +124,11 @@ exports.defaultOptions = {
  * @param {object} instance - TesseractWorker instance
  * @param {object} options
  * @param {string} options.workerPath - worker script path
+ * @param {boolean} options.preventBlobURL - do not use a blob: URL for the worker script
  */
-exports.spawnWorker = (instance, { workerPath }) => {
+exports.spawnWorker = (instance, { workerPath, preventBlobURL }) => {
   let worker;
-  if (Blob && URL) {
+  if (Blob && URL && !preventBlobURL) {
     const blob = new Blob([`importScripts("${workerPath}");`], {
       type: 'application/javascript',
     });
diff --git a/src/common/TesseractWorker.js b/src/common/TesseractWorker.js
index 01d50900c..af2d082bb 100644
--- a/src/common/TesseractWorker.js
+++ b/src/common/TesseractWorker.js
@@ -43,6 +43,7 @@ class TesseractWorker {
    * @param {string} [options.cachePath=.] - @see {@link https://github.com/jeromewu/tesseract.js-utils/blob/master/src/loadLang.js}
    * @param {string} [options.cacheMethod=write] - @see {@link https://github.com/jeromewu/tesseract.js-utils/blob/master/src/loadLang.js}
    * @param {string} [options.dataPath=.] - @see {@link https://github.com/jeromewu/tesseract.js-utils/blob/master/src/loadLang.js}
+   * @param {boolean} [options.preventBlobURL=false] - do not use a blob: URL for the worker script
    *
    */
   constructor(options = {}) {
diff --git a/src/common/options.js b/src/common/options.js
index 36a923919..df55425d1 100644
--- a/src/common/options.js
+++ b/src/common/options.js
@@ -8,6 +8,7 @@ module.exports = {
      * of 20 MB.
      */
     langPath: 'https://tessdata.projectnaptha.com/4.0.0',
+    preventBlobURL: false,
   },
   /*
    * default params for recognize()

From 6fb2195b75c67600cf7e0d1fb42edfcf28e5a796 Mon Sep 17 00:00:00 2001
From: Jerome Wu <jeromewus@gmail.com>
Date: Sun, 25 Aug 2019 17:41:59 +0800
Subject: [PATCH 2/2] Rename variable to workerBlobURL

---
 src/browser/index.js          | 6 +++---
 src/common/TesseractWorker.js | 2 +-
 src/common/options.js         | 5 ++++-
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/browser/index.js b/src/browser/index.js
index 06e62ab5d..880515093 100644
--- a/src/browser/index.js
+++ b/src/browser/index.js
@@ -124,11 +124,11 @@ exports.defaultOptions = {
  * @param {object} instance - TesseractWorker instance
  * @param {object} options
  * @param {string} options.workerPath - worker script path
- * @param {boolean} options.preventBlobURL - do not use a blob: URL for the worker script
+ * @param {boolean} options.workerBlobURL - Use a blob:// URL for the worker script
  */
-exports.spawnWorker = (instance, { workerPath, preventBlobURL }) => {
+exports.spawnWorker = (instance, { workerPath, workerBlobURL }) => {
   let worker;
-  if (Blob && URL && !preventBlobURL) {
+  if (Blob && URL && workerBlobURL) {
     const blob = new Blob([`importScripts("${workerPath}");`], {
       type: 'application/javascript',
     });
diff --git a/src/common/TesseractWorker.js b/src/common/TesseractWorker.js
index af2d082bb..5b66287c3 100644
--- a/src/common/TesseractWorker.js
+++ b/src/common/TesseractWorker.js
@@ -32,6 +32,7 @@ class TesseractWorker {
    *     In browser-like environment, it is downloaded from a CDN service.
    *     Please update this option if you self-host the worker script.
    *     In Node.js environment, this option is not used as the worker script is in local.
+   * @param {boolean} [options.workerBlobURL=true] - Use a blob: URL for the worker script
    * @param {string} options.corePath -
    *     A remote path to load tesseract.js-core script.
    *     In browser-like environment, it is downloaded from a CDN service.
@@ -43,7 +44,6 @@ class TesseractWorker {
    * @param {string} [options.cachePath=.] - @see {@link https://github.com/jeromewu/tesseract.js-utils/blob/master/src/loadLang.js}
    * @param {string} [options.cacheMethod=write] - @see {@link https://github.com/jeromewu/tesseract.js-utils/blob/master/src/loadLang.js}
    * @param {string} [options.dataPath=.] - @see {@link https://github.com/jeromewu/tesseract.js-utils/blob/master/src/loadLang.js}
-   * @param {boolean} [options.preventBlobURL=false] - do not use a blob: URL for the worker script
    *
    */
   constructor(options = {}) {
diff --git a/src/common/options.js b/src/common/options.js
index df55425d1..a86a263de 100644
--- a/src/common/options.js
+++ b/src/common/options.js
@@ -8,7 +8,10 @@ module.exports = {
      * of 20 MB.
      */
     langPath: 'https://tessdata.projectnaptha.com/4.0.0',
-    preventBlobURL: false,
+    /*
+     * Use BlobURL for worker script by default
+     */
+    workerBlobURL: true,
   },
   /*
    * default params for recognize()