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---+ Enabling Cross-Origin Resource Sharing (CORS) on a Virtuoso SPARQL Endpoint

---++ What is CORS?

CORS enables conventional client-server interactions over a Web of data sources, with embedded elements from multiple sources presented by a single page. Basically, CORS helps traverse the Web from a single original data source.

---++ Why enable CORS?

Enabling a Virtuoso SPARQL Endpoint to serve the Data Access needs of user agents (e.g., Javascript clients) that are programmed to leverage CORS.

---++ How can I enable CORS?

You CORS enable a Virtuoso SPARQL endpoint via the following steps:

   1 Go to the HTML-based Instance Admin UI (Conductor) at <code><nowiki>http://{your-instance-hostname}:[port]/conductor</nowiki></code>.
   1 Enter dba credentials.
   1 Go to <b>Web Application Server &#8594; Virtual Domains & Directories</b>:
%BR%%BR%<a href="%ATTACHURLPATH%/cors1.png" target="_blank"><img src="%ATTACHURLPATH%/cors1.png" width="600px" /></a>%BR%%BR%
   1 Expand <b>Interface</b> for the <b>Default Web Site</b>:
%BR%%BR%<a href="%ATTACHURLPATH%/cors2.png" target="_blank"><img src="%ATTACHURLPATH%/cors2.png" width="600px" /></a>%BR%%BR%
   1 Locate the <code>/sparql</code> <b>Logical Path</b>:
%BR%%BR%<a href="%ATTACHURLPATH%/cors3.png" target="_blank"><img src="%ATTACHURLPATH%/cors3.png" width="600px" /></a>%BR%%BR%
   1 Click <b>Edit</b>:
%BR%%BR%<a href="%ATTACHURLPATH%/cors4.png" target="_blank"><img src="%ATTACHURLPATH%/cors4.png" width="600px" /></a>
%BR%<a href="%ATTACHURLPATH%/cors5.png" target="_blank"><img src="%ATTACHURLPATH%/cors5.png" width="600px" /></a>%BR%%BR%
   1 Enter, for example, <b><code>*</code></b> in the <b>Cross-Origin Resource Sharing</b> input field. Optionally you can check the <b>Reject Unintended CORS</b> check-box:
%BR%%BR%<a href="%ATTACHURLPATH%/cors6.png" target="_blank"><img src="%ATTACHURLPATH%/cors6.png" width="600px" /></a>%BR%%BR%
   1 Click <b>Save Changes</b>.


---++Related

   * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]]
   * [[VirtTipsAndTricksGuideCORSSetup][Setting up server-side Cross-Origin Resource Sharing (CORS) with Virtuoso]]
   * [[http://enable-cors.org/][Third-party guide to enabling Cross-Origin Resource Sharing with various servers]]