Use urlreaders for http refs

Signed-off-by: Kiss Miklos <miklos@roadie.io>

plugins/catalog-backend-module-openapi/src/lib/bundle.test.ts

@@ -88,6 +88,33 @@ describe('bundleOpenApiSpecification', () => {
       resolveUrl,
     );
 
+    expect(result).toEqual(expectedResult.trimStart());
+  });
+  it('should use the urlreaders to fetch $refs', async () => {
+    const spec = `
+    openapi: "3.0.0"
+    info:
+      version: 1.0.0
+      title: Swagger Petstore
+      license:
+        name: MIT
+    servers:
+      - url: http://petstore.swagger.io/v1
+    paths:
+      /pets:
+        get:
+          $ref: "https://foo.com/paths/pets/list.yaml"
+    `;
+
+    read.mockResolvedValue(list);
+
+    const result = await bundleOpenApiSpecification(
+      spec,
+      'https://github.com/owner/repo/blob/main/catalog-info.yaml',
+      read,
+      resolveUrl,
+    );
+
     expect(result).toEqual(expectedResult.trimStart());
   });
 });

plugins/catalog-backend-module-openapi/src/lib/bundle.ts

@@ -47,11 +47,21 @@ export async function bundleOpenApiSpecification(
       return await read(url);
     },
   };
+  const httpUrlReaderResolver: SwaggerParser.ResolverOptions = {
+    canRead: ref => {
+      const protocol = getProtocol(ref.url);
+      return protocol === 'http' || protocol === 'https';
+    },
+    read: async ref => {
+      const url = resolveUrl(ref.url, baseUrl);
+      return await read(url);
+    },
+  };
 
   const options: SwaggerParser.Options = {
     resolve: {
       file: fileUrlReaderResolver,
-      http: true,
+      http: httpUrlReaderResolver,
     },
   };
   const specObject = parse(specification);