Origin
Web content's origin is defined by the scheme (protocol), hostname (domain), and port of the URL used to access it. Two objects have the same origin only when the scheme, hostname, and port all match.
Some operations are restricted to same-origin content, and this restriction can be lifted using CORS.
Examples
These are same origin because they have the same scheme (http) and hostname (example.com), and the different file path does not matter:
http://example.com/app1/index.htmlhttp://example.com/app2/index.html
These are same origin because a server delivers HTTP content through port 80 by default:
http://example.com:80http://example.com
These are not same origin because they use different schemes:
http://example.com/app1https://example.com/app2
These are not same origin because they use different hostnames:
http://example.comhttp://www.example.comhttp://myapp.example.com
These are not same origin because they use different ports:
http://example.comhttp://example.com:8080
See also
- Same-origin policy
- Related glossary terms:
- HTML specification: origin