(core) - Shorten queries for hashing (#911)

* remove comments and whitespace from our own queries

* add changeset

* add comment after opening bracket in test

* Remove location data from parsed queries

Co-authored-by: Phil Pluckthun <phil@kitten.sh>

.changeset/hip-adults-look.md

@@ -0,0 +1,5 @@
+---
+'@urql/core': patch
+---
+
+Remove whitespace and comments from string-queries

packages/core/src/utils/request.test.ts

@@ -73,3 +73,17 @@ it('should return a valid query object with variables', () => {
     variables: { test: 5 },
   });
 });
+
+it('should remove comments', () => {
+  const doc = `
+    { #query
+      # broken
+      test
+    }
+  `;
+  const val = createRequest(doc);
+  expect(print(val.query)).toBe(`{
+  test
+}
+`);
+});

packages/core/src/utils/request.ts

@@ -7,7 +7,8 @@ interface Documents {
   [key: number]: DocumentNode;
 }
 
-const hashQuery = (q: string): number => hash(q.replace(/[\s,]+/g, ' ').trim());
+const hashQuery = (q: string): number =>
+  hash(q.replace(/([\s,]|#[^\n\r]+)+/g, ' ').trim());
 
 const docs: Documents = Object.create(null);
 
@@ -19,7 +20,8 @@ export const createRequest = (
   let query: DocumentNode;
   if (typeof q === 'string') {
     key = hashQuery(q);
-    query = docs[key] !== undefined ? docs[key] : parse(q);
+    query =
+      docs[key] !== undefined ? docs[key] : parse(q, { noLocation: true });
   } else if ((q as any).__key !== undefined) {
     key = (q as any).__key;
     query = q;