Fix API parameters signature

Author: adimiz1

src/api/upload/config/api-config.tsx

@@ -4,6 +4,7 @@ export const defaultResourceType = 'image';
 export const defaultChunckSize = 20 * 1024 * 1024;
 export const defaultTimeout = 60;
 export const defaultUploadPrefix = 'https://api.cloudinary.com';
+export const defaultSignatureVersion = 2;
 
 export
 
@@ -25,6 +26,7 @@ class APIConfig {
     cloudName:      string  = '';
     apiKey:         string | null = '';
     apiSecret:      string | null = '';
+    signatureVersion: number = defaultSignatureVersion;
 }
 
 export { APIConfig }

src/api/upload/utils/index.js

@@ -12,14 +12,34 @@ export function present(value) {
 }
 
 async function sign_request(apiConfig, params, options = {}) {
-    let apiKey = apiConfig.apiKey
-    let apiSecret = apiConfig.apiSecret
-    params = clear_blank(params);
-    params.signature = await api_sign_request(params, apiSecret);
-    params.api_key = apiKey;
-    return params;
+  const apiKey = apiConfig.apiKey;
+  const apiSecret = apiConfig.apiSecret;
+  const signatureVersion = apiConfig.signatureVersion;
+
+  params = clear_blank(params);
+
+  if (signatureVersion === 2) {
+    for (let key in params) {
+      const value = params[key];
+
+      if (Array.isArray(value)) {
+        params[key] = value.map(v =>
+          typeof v === 'string' ? v.replace(/&/g, '%26') : v
+        );
+      } else if (typeof value === 'string') {
+        params[key] = value.replace(/&/g, '%26');
+      }
+    }
   }
 
+  params.signature = await api_sign_request(params, apiSecret);
+  params.api_key = apiKey;
+  return params;
+}
+
+
+
+
   async function api_sign_request(params_to_sign, api_secret) {
     let to_sign = entries(params_to_sign).filter(
       ([k, v]) => present(v)