XMLHttpRequest corrupts headers named after Object prototype properties

Description

React Native XMLHttpRequest stores request headers and normalized response headers in ordinary objects. Valid header names that collide with Object.prototype are therefore corrupted or hidden: repeated Constructor values begin with inherited function text, __proto__ cannot be stored normally, and an absent toString response header is returned as an inherited function instead of null.

Expected behavior

All valid case-insensitive header names should be stored, combined, and retrieved as their own values without interacting with JavaScript object prototypes.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript networking - All

Inizia dall'implementazione di XMLHttpRequest di React Native e verifica come vengono memorizzati e recuperati gli header delle richieste e gli header normalizzati delle risposte. Trova o aggiungi test mirati per Constructor, proto e un header toString assente; il lavoro è completo quando i nomi validi senza distinzione tra maiuscole e minuscole mantengono i propri valori senza interagire con Object.prototype.