Example for querying the SPARQL-WebID? endpoint using Virtuoso function http_client

The following example demonstrates how to query the SPARQL-WebID? endpoint (listening on default HTTPS 443 port) using Virtuoso function http_client:

  1. Make sure the steps from the WebID Protocol cURL Usage Guide are done.
  2. Log in at Virtuoso ISQL with your user credentials: 

    C:\>isql localhost:1111 johndoe ****
Connected to OpenLink Virtuoso
Driver: 06.01.3127 OpenLink Virtuoso ODBC Driver
OpenLink Interactive SQL (Virtuoso), version 0.9849b.
Type HELP; for help and EXIT; to exit.
SQL>

  3. Execute: 

    SQL>select http_client ('https://localhost/sparql-webid?query=select+*+where+{+%3Fx+%3Fy+%3Fz+.+}+limit+10&format=text%2Fn3', cert_file=>'d
b:cli_key', insecure=>1);
callret
VARCHAR
_______________________________________________________________________________


@prefix res: <http://www.w3.org/2005/sparql-results#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
_:_ a res:ResultSet .
_:_ res:resultVariable "x" , "y" , "z" .
@prefix ns0:    <https://localhost/tutorial/> .
@prefix rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:hosting ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:xml ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:repl ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:rdfview ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:services ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:wap ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:bpeldemo ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [
      res:binding [ res:variable "x" ; res:value ns0:web ] ;
      res:binding [ res:variable "y" ; res:value rdf:type ] ;
      res:binding [ res:variable "z" ; res:value "Tutorial" ] ] .
_:_ res:solution [


1 Rows. -- 281 msec.
SQL>

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