How do I use Access-Control-Allow-Origin? Does it just go in between the html head tags?

There are 3 ways to allow cross domain origin (excluding jsonp): Set the header in the page directly using a templating language like PHP. Keep in mind there can be no HTML before your header or it will fail. Modify the server configuration file (apache.conf) and add this line. Note that “*” represents allow all. … Read more

Three.js and loading a cross-domain image

Update In newer versions of THREE.js cross origin images are handled by default. THREE.ImageUtils.loadTexture is deprecated. It’s common to use TextureLoader const loader = new THREE.TextureLoader(); const mapOverlay = loader.load(‘’); Original Answer This works THREE.ImageUtils.crossOrigin = ”; var mapOverlay = THREE.ImageUtils.loadTexture(‘’); Here’s a sample var canvas = document.getElementById(“c”); var renderer = new THREE.WebGLRenderer({canvas: canvas}); var … Read more

Enable CORS in Golang

I use gorilla/mux package to build Go RESTful API server, and client use JavaScript Request can work, My Go Server runs at localhost:9091, and the Server code: router := mux.NewRouter() //api route is /people, //Methods(“GET”, “OPTIONS”) means it support GET, OPTIONS router.HandleFunc(“/people”, GetPeopleAPI).Methods(“GET”, “OPTIONS”) log.Fatal(http.ListenAndServe(“:9091”, router)) I find giving OPTIONS here is important, otherwise error … Read more

HTTP and HTTPS iframe

It is generally bad practice to embed an iframe with content served over HTTPS within a page served over plain HTTP (or mix content). The reason for this is that there’s no good way for the user to check they’re using the HTTPS site they intend (unless the user really wants to check the source … Read more

Ajax Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource

JSONP or “JSON with padding” is a communication technique used in JavaScript programs running in web browsers to request data from a server in a different domain, something prohibited by typical web browsers because of the same-origin policy. JSONP takes advantage of the fact that browsers do not enforce the same-origin policy on script tags. … Read more