Sparql Endpoint Proxy Servlet - Helps for bypassing CORS issues.
Simple proxy that redirects all elements in the request to a configured SPARQL endpoint. Headers in the request are also redirected.
The only setting required to configure the SPARQL Endpoint proxy is proxy.host which refers to the host:port info in which the Stardog HTTP service is running, for example:
<init-param>
<param-name>proxy.host</param-name>
<param-value>http://localhost:5822</param-value>
</init-param>
The previous indicats the a Stardog DB is running the HTTP protocol in http://localhost:5822, which can be modified to any other information, either a local reference or remote.
To build the proxy war, just execute:
ant clean web-dist
This will generate the sparql-proxy.war file that you just need to copy to your app container webapps directory.
To use the proxy, simple send the request to it, following the same pattern as you would do with a Stardog DB directly. For instance, to query the DB gov directly to Stardog HTTP endpoint you'll do:
curl -X GET "http://localhost:5822/gov/query?query=select%20*%20where%20%7B%20%3Fs%20%3Fp%20%3Fo%20%7D%20limit%2010"
Using the proxy (with CORS support), the same can be done:
curl -X GET "http://localhost:8181/sparql-proxy/gov/query?query=select%20*%20where%20%7B%20%3Fs%20%3Fp%20%3Fo%20%7D%20limit%2010"
where:
http://localhost:8181/sparql-proxyis the path for the sparql-proxy (with servlet containter running in port 8181)govis the Stardog DBquery?query=points to the encoded query.