CORS Overview

Cross-origin resource sharing (CORS) is a mechanism defined by the World Wide Web Consortium (W3C) that allows a web application program in one domain to access resources located in another one.

For normal web page requests, website scripts and contents in one domain cannot interact with those in another because of Same Origin Policies (SOPs).

OBS supports CORS rules that allow the resources in OBS to be requested by other domains.

You can call the API to configure CORS for a bucket to allow cross-origin requests from client browsers. The configured CORS rules follow the principle of new ones overwriting old ones.

For more information, see CORS.