Top "Preflight" questions

A preflight is an HTTP OPTIONS request that browsers (automatically on their own) send to servers before trying certain kinds of cross-origin requests — in order to determine if a server has opted-in to receiving those kinds of requests.

axios preflight fail error 301 using vue.js

I've got a Laravel 5.4 API, that works fine in Postman and the Browser. Localhost works fine- Laravel 5.4 is running on …

vue.js cors laravel-5.4 axios preflight
Response to preflight: “No 'Access-Control-Allowed-Origin'” despite CORS-enabled

I am having trouble figuring out an issue with an angular 4 preflight request not passing a CORS access-control check: “No …

asp.net-web-api cors angular2-forms angular2-observables preflight
angular.js $resources setting Authorization header

js what I'm trying to do is making REST API REQUEST to server. A request should be 'GET' method and …

angularjs http-headers preflight
Convert CMYK PDF into spot colors (colours)

Is it possible to pre-process (in batch) PDFs that are in CMYK format to separate out into spot colours? I …

pdf printing cmyk preflight