This repository was archived by the owner on Jan 28, 2025. It is now read-only.
This repository was archived by the owner on Jan 28, 2025. It is now read-only.
Non-standard JSON format on query timeout #113
Description
I obtain a non-JSON standard response when I send a query that timeout asking for a JSON response.
When querying the following :
PREFIX dcat: <http://www.w3.org/ns/dcat#>
PREFIX void: <http://rdfs.org/ns/void#>
ASK {
SERVICE <http://prod-dekalog.inria.fr/sparql> {
{
BIND(Iri(REPLACE(str(<http://prod-dekalog.inria.fr/sparql>), "http://", "https://")) AS ?endpointUrl)
{ ?res a dcat:Dataset }
UNION { ?res a void:Dataset }
UNION { GRAPH ?g { ?res a dcat:Dataset } }
UNION { GRAPH ?g { ?res a void:Dataset } }
{ ?res ?p <http://prod-dekalog.inria.fr/sparql> }
UNION { GRAPH ?g { ?res ?p ?endpointUrl } } .
}
UNION {
BIND(Iri(REPLACE(str(<http://prod-dekalog.inria.fr/sparql>), "https://", "http://")) AS ?endpointUrl)
{ ?res a dcat:Dataset }
UNION { ?res a void:Dataset }
UNION { GRAPH ?g { ?res a dcat:Dataset } }
UNION { GRAPH ?g { ?res a void:Dataset } }
{ ?res ?p <http://prod-dekalog.inria.fr/sparql> }
UNION { GRAPH ?g { ?res ?p ?endpointUrl } } .
}
}
}
with format=json in the url query, I obtain the following response from the server:
{
<!--
PREFIX dcat: <http://www.w3.org/ns/dcat#>
PREFIX void: <http://rdfs.org/ns/void#>
ASK {
SERVICE <http://prod-dekalog.inria.fr/sparql> {
{
BIND(Iri(REPLACE(str(<http://prod-dekalog.inria.fr/sparql>), "http://", "https://")) AS ?endpointUrl)
{ ?res a dcat:Dataset }
UNION { ?res a void:Dataset }
UNION { GRAPH ?g { ?res a dcat:Dataset } }
UNION { GRAPH ?g { ?res a void:Dataset } }
{ ?res ?p <http://prod-dekalog.inria.fr/sparql> }
UNION { GRAPH ?g { ?res ?p ?endpointUrl } } .
}
UNION {
BIND(Iri(REPLACE(str(<http://prod-dekalog.inria.fr/sparql>), "https://", "http://")) AS ?endpointUrl)
{ ?res a dcat:Dataset }
UNION { ?res a void:Dataset }
UNION { GRAPH ?g { ?res a dcat:Dataset } }
UNION { GRAPH ?g { ?res a void:Dataset } }
{ ?res ?p <http://prod-dekalog.inria.fr/sparql> }
UNION { GRAPH ?g { ?res ?p ?endpointUrl } } .
}
}
}
Service error: http://prod-dekalog.inria.fr/sparql
jakarta.ws.rs.ProcessingException: java.net.SocketTimeoutException: Read timed out
-->
"head": { } ,
"boolean" : false
}
The javascript JSON parser does not recognize this as proper JSON and throws an exception on the first <.
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