[jira] [Created] (JENA-1263) Configure HTTP client to follow 303 redirects

["Aaron Coburn (JIRA)" <ji...@apache.org>]

Aaron Coburn created JENA-1263:
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             Summary: Configure HTTP client to follow 303 redirects 
                 Key: JENA-1263
                 URL: https://issues.apache.org/jira/browse/JENA-1263
             Project: Apache Jena
          Issue Type: Improvement
          Components: ARQ
    Affects Versions: Jena 3.1.1
            Reporter: Aaron Coburn
            Priority: Minor
             Fix For: Jena 3.2.0


When calling RDFDataMgr.read(Model model, String uri), the underlying HTTP client does not appear to follow 303 redirects. For example:

Model m = createDefaultModel();
RDFDataMgr.read(m, "http://purl.org/dc/terms/");

org.apache.jena.riot.RiotException: Failed to determine the content type: (URI=http://purl.org/dc/terms/ : stream=text/html)

A work-around is to add a static block with a custom HTTP client like so:

static {
    HttpOp.setDefaultHttpClient(HttpClientBuilder.create().setRedirectStrategy(new LaxRedirectStrategy()).build());
}

By default the Apache HTTP client follows 301 and 302 redirects (but not 303 redirects), but the W3C recommends using 303 redirects for publishing RDF vocabularies (https://www.w3.org/TR/swbp-vocab-pub/), which is what the Dublin Core vocabularies use.

This sort of redirect handling worked previously, e.g. Jena 3.1.0.



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