Remove Buffer (#330)

package-lock.json

@@ -466,10 +466,9 @@
       "dev": true
     },
     "atob": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.1.tgz",
-      "integrity": "sha1-ri1acpR38onWDdf5amMUoi3Wwio=",
-      "dev": true
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
+      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg=="
     },
     "babel-runtime": {
       "version": "6.26.0",

package.json

@@ -79,6 +79,7 @@
   },
   "dependencies": {
     "@azure/cosmos-sign": "1.0.2",
+    "atob": "2.1.2",
     "binary-search-bounds": "2.0.3",
     "crypto-hash": "1.1.0",
     "fast-json-stable-stringify": "2.0.0",

src/session/sessionContainer.ts

@@ -1,3 +1,4 @@
+import atob from "atob";
 import { Constants, getContainerLink, OperationType, ResourceType, trimSlashes } from "../common";
 import { CosmosHeaders } from "../queryExecutionContext";
 import { SessionContext } from "./SessionContext";
@@ -71,13 +72,9 @@ export class SessionContainer {
   }
 
   private validateOwnerID(ownerId: string) {
-    const ownerIdBuffer = Buffer.from(ownerId, "base64");
     // If ownerId contains exactly 8 bytes it represents a unique database+collection identifier. Otherwise it represents another resource
     // The first 4 bytes are the database. The last 4 bytes are the collection.
-    if (ownerIdBuffer.length === 8) {
-      return true;
-    }
-    return false;
+    return atob(ownerId).length === 8;
   }
 
   private getPartitionKeyRangeIdToTokenMap(collectionName: string): Map<string, VectorSessionToken> {

src/typings/atob.d.ts

@@ -0,0 +1,4 @@
+declare module "atob" {
+  const _atob: typeof atob;
+  export = _atob;
+}

src/typings/binary-search-bounds.d.ts

@@ -1,5 +1,4 @@
 declare module "binary-search-bounds" {
-  // tslint:disable-next-line:variable-name
   const _bs: any;
   export = _bs;
 }