diff --git a/Libraries/Network/RCTNetworking.m b/Libraries/Network/RCTNetworking.m
index 0c5aeaecd..6bbea21b1 100644
--- a/Libraries/Network/RCTNetworking.m
+++ b/Libraries/Network/RCTNetworking.m
@@ -136,6 +136,10 @@ RCT_EXPORT_MODULE()
 
 - (id<RCTURLRequestHandler>)handlerForRequest:(NSURLRequest *)request
 {
+  if (!request.URL) {
+    return nil;
+  }
+
   if (!_handlers) {
 
     // get handlers
diff --git a/Libraries/Network/XMLHttpRequestBase.js b/Libraries/Network/XMLHttpRequestBase.js
index 6c7bb8b48..4cdc42472 100644
--- a/Libraries/Network/XMLHttpRequestBase.js
+++ b/Libraries/Network/XMLHttpRequestBase.js
@@ -179,6 +179,9 @@ class XMLHttpRequestBase {
       // async is default
       throw new Error('Synchronous http requests are not supported');
     }
+    if (!url) {
+      throw new Error('Cannot load an empty url');
+    }
     this._reset();
     this._method = method;
     this._url = url;
diff --git a/React/Base/RCTUtils.m b/React/Base/RCTUtils.m
index 48e1fea08..e6ebdb806 100644
--- a/React/Base/RCTUtils.m
+++ b/React/Base/RCTUtils.m
@@ -494,7 +494,11 @@ NSString *RCTBundlePathForURL(NSURL *URL)
     // Not a bundle-relative file
     return nil;
   }
-  return [path substringFromIndex:bundlePath.length + 1];
+  path = [path substringFromIndex:bundlePath.length];
+  if ([path hasPrefix:@"/"]) {
+    path = [path substringFromIndex:1];
+  }
+  return path;
 }
 
 BOOL RCTIsXCAssetURL(NSURL *imageURL)