Update pytorch.js

source/pytorch.js

@@ -2042,14 +2042,13 @@ pytorch.Container = class {
         if (zip) {
             return zip;
         }
-        const stream = context.stream;
-        const signature = [ 0x80, undefined, 0x8a, 0x0a, 0x6c, 0xfc, 0x9c, 0x46, 0xf9, 0x20, 0x6a, 0xa8, 0x50, 0x19 ];
-        if (signature.length <= stream.length && stream.peek(signature.length).every((value, index) => signature[index] === undefined || signature[index] === value)) {
-            return new pytorch.Container.Pickle(stream);
+        const pickle = pytorch.Container.Pickle.open(context.stream);
+        if (pickle) {
+            return pickle;
         }
-        const entries = context.entries('tar');
-        if (entries.has('pickle')) {
-            return new pytorch.Container.Tar(entries);
+        const tar = pytorch.Container.Tar.open(context.entries('tar'));
+        if (tar) {
+            return tar;
         }
         return null;
     }
@@ -2057,6 +2056,13 @@ pytorch.Container = class {
 
 pytorch.Container.Tar = class {
 
+    static open(entries) {
+        if (entries.has('pickle')) {
+            return new pytorch.Container.Tar(entries);
+        }
+        return null;
+    }
+
     constructor(entries) {
         this._entries = entries;
     }
@@ -2183,6 +2189,14 @@ pytorch.Container.Tar = class {
 
 pytorch.Container.Pickle = class {
 
+    static open(stream) {
+        const signature = [ 0x80, undefined, 0x8a, 0x0a, 0x6c, 0xfc, 0x9c, 0x46, 0xf9, 0x20, 0x6a, 0xa8, 0x50, 0x19 ];
+        if (signature.length <= stream.length && stream.peek(signature.length).every((value, index) => signature[index] === undefined || signature[index] === value)) {
+            return new pytorch.Container.Pickle(stream);
+        }
+        return null;
+    }
+
     constructor(stream) {
         this._stream = stream;
     }