fix(headers): silently skip empty header names instead of throwing (#10875)

* fix(headers): silently skip empty header names instead of throwing

Signed-off-by: Ravi <13908473+rkdfx@users.noreply.github.com>

* chore: add suggested test headers length assert

Signed-off-by: Ravi <13908473+rkdfx@users.noreply.github.com>

* test(headers): cover whitespace-only header names

---------

Signed-off-by: Ravi <13908473+rkdfx@users.noreply.github.com>
Co-authored-by: Jay <jasonsaayman@gmail.com>

PRE_RELEASE_CHANGELOG.md

@@ -8,6 +8,7 @@
 
 ## Bug Fixes
 
+- **AxiosHeaders:** Silently skip empty response header names emitted by some React Native Android responses instead of throwing. (**#6959**, **#10875**)
 - **Request Data:** Preserve enumerable symbol keys when merging plain request data before `transformRequest`. (**#6392**)
 
 ## Release Documentation TODO

lib/core/AxiosHeaders.js

@@ -89,7 +89,7 @@ class AxiosHeaders {
       const lHeader = normalizeHeader(_header);
 
       if (!lHeader) {
-        throw new Error('header name must be a non-empty string');
+        return;
       }
 
       const key = utils.findKey(self, lHeader);

tests/unit/axiosHeaders.test.js

@@ -146,6 +146,29 @@ describe('AxiosHeaders', () => {
 
       assert.strictEqual(headers.get('x-name'), '请求Injected: true用户');
     });
+
+    // Regression: https://github.com/axios/axios/issues/6959
+    it('should silently skip empty header names', () => {
+      const headers = new AxiosHeaders();
+
+      assert.doesNotThrow(() => headers.set('', 'a'));
+      assert.doesNotThrow(() => headers.set('   ', 'b'));
+      assert.doesNotThrow(() => headers.set({ '': 'c', '   ': 'd', foo: 'bar' }));
+      assert.doesNotThrow(() =>
+        headers.set(
+          new Map([
+            ['', 'e'],
+            ['   ', 'f'],
+            ['x', 'y'],
+          ])
+        )
+      );
+
+      assert.strictEqual(headers.has(''), false);
+      assert.strictEqual(headers.get('foo'), 'bar');
+      assert.strictEqual(headers.get('x'), 'y');
+      assert.strictEqual(Object.keys(headers).length, 2);
+    });
   });
 
   it('should support uppercase name mapping for names overlapped by class methods', () => {