ensure all of + and / are replaced to - and _ not only the first occu…

…rances; closes issue #2

__tests__/utils.test.ts

@@ -5,4 +5,7 @@ describe('urlsafe_b64encode', () => {
     it('should encode a string to base64', () => {
         expect(urlsafe_b64encode('hello+foo/bar=====')).toBe('aGVsbG8rZm9vL2Jhcj09PT09');
     });
+    it('multiple characters should be encoded correctly', () => {
+        // XXX: investigate how to produce a string that contains + or / when b64 encoded.
+    });
 });

package.json

@@ -1,6 +1,6 @@
 {
     "name": "scrapfly-sdk",
-    "version": "0.5.0",
+    "version": "0.5.1",
     "description": "SDK for Scrapfly.io web scraping service",
     "type": "module",
     "types": "build/src/main.d.ts",

src/utils.ts

@@ -1,3 +1,6 @@
 export function urlsafe_b64encode(data: string): string {
-    return Buffer.from(data, 'utf-8').toString('base64').replace('+', '-').replace('/', '_').replace(/=+$/, '');
+    return Buffer.from(data, 'utf-8').toString('base64')
+        .replace(/\+/g, '-')  // Replace all instances of '+' with '-'
+        .replace(/\//g, '_')  // Replace all instances of '/' with '_'
+        .replace(/=+$/, '');  // Remove trailing '=' characters
 }