fix: Error Redactor Case-Insensitive Matching (#613)

Author: danielbankhead

core/packages/gaxios/src/common.ts

@@ -369,17 +369,17 @@ export function defaultErrorRedactor<T = any>(data: {
 
     for (const key of Object.keys(headers)) {
       // any casing of `Authentication`
-      if (/^authentication$/.test(key)) {
+      if (/^authentication$/i.test(key)) {
         headers[key] = REDACT;
       }
 
       // any casing of `Authorization`
-      if (/^authorization$/.test(key)) {
+      if (/^authorization$/i.test(key)) {
         headers[key] = REDACT;
       }
 
       // anything containing secret, such as 'client secret'
-      if (/secret/.test(key)) {
+      if (/secret/i.test(key)) {
         headers[key] = REDACT;
       }
     }
@@ -394,9 +394,9 @@ export function defaultErrorRedactor<T = any>(data: {
       const text = obj[key];
 
       if (
-        /grant_type=/.test(text) ||
-        /assertion=/.test(text) ||
-        /secret/.test(text)
+        /grant_type=/i.test(text) ||
+        /assertion=/i.test(text) ||
+        /secret/i.test(text)
       ) {
         obj[key] = REDACT;
       }

core/packages/gaxios/test/test.getch.ts

@@ -26,7 +26,7 @@ import {
   GaxiosResponse,
   GaxiosPromise,
 } from '../src';
-import {GAXIOS_ERROR_SYMBOL} from '../src/common';
+import {GAXIOS_ERROR_SYMBOL, Headers} from '../src/common';
 import {pkg} from '../src/util';
 import qs from 'querystring';
 import fs from 'fs';
@@ -772,8 +772,11 @@ describe('🎏 data handling', () => {
 
     const config: GaxiosOptions = {
       headers: {
-        authentication: 'My Auth',
-        authorization: 'My Auth',
+        Authentication: 'My Auth',
+        /**
+         * Ensure casing is properly handled
+         */
+        AUTHORIZATION: 'My Auth',
         'content-type': 'application/x-www-form-urlencoded',
         random: 'data',
       },
@@ -821,8 +824,8 @@ describe('🎏 data handling', () => {
       assert(e.config.headers);
       assert.deepStrictEqual(e.config.headers, {
         ...config.headers, // non-redactables should be present
-        authentication: REDACT,
-        authorization: REDACT,
+        Authentication: REDACT,
+        AUTHORIZATION: REDACT,
       });
 
       // config redactions - data
@@ -847,11 +850,17 @@ describe('🎏 data handling', () => {
       // response redactions
       assert(e.response);
       assert.deepStrictEqual(e.response.config, e.config);
-      assert.deepStrictEqual(e.response.headers, {
+
+      const expectedHeaders: Headers = {
         ...responseHeaders, // non-redactables should be present
         authentication: REDACT,
         authorization: REDACT,
-      });
+      };
+
+      delete expectedHeaders['AUTHORIZATION'];
+      delete expectedHeaders['Authentication'];
+
+      assert.deepStrictEqual(e.response.headers, expectedHeaders);
       assert.deepStrictEqual(e.response.data, {
         ...response, // non-redactables should be present
         assertion: REDACT,