问题 I want to add custom headers (Bearer token) to each http call in a ASP.Net Web Form application. Using the recommendations in the following links, I added the code to send added headers to the server to no avail. How to intercept all http requests including form submits and How to alter the headers of a Request? <script> (function() { (function (open) { XMLHttpRequest.prototype.open = function (method, url, async, user, password) { console.log("Adding header"); open.call(this, method, url,