* guix/scripts/publish.scm (render-content-addressed-file): New procedure. (http-write): Add 'application/octet-stream' case. (make-request-handler): Add /file/NAME/sha256/HASH URLs. * tests/publish.scm ("/file/NAME/sha256/HASH") ("/file/NAME/sha256/INVALID-NIX-BASE32-STRING") ("/file/NAME/sha256/INVALID-HASH"): New tests. * doc/guix.texi (Invoking guix publish): Mention the /file URLs.