Fuseki GUI 400 error on all queries

[Mikael Pesonen <mi...@lingsoft.fi>]

I've got strange problem with one Fuseki setup. Web GUI is generating 
somehow incorrect queries resulting error 400. Endpoint in GUI is set to 
/fuseki/ds which works on other setups. Also sparql update works, error 
occurs only on all select etc queries. Looking from browser developer 
tools, query content-type is set to application/x-www-form-urlencoded. 
Could that be the reason? There is no other info on the error, just code 
400. Fuseki is a bit old version 3.16.

Re: Fuseki GUI 400 error on all queries

[Andy Seaborne <an...@apache.org>]

On 09/12/2021 09:44, Mikael Pesonen wrote:
> 
> I've got strange problem with one Fuseki setup. Web GUI is generating 
> somehow incorrect queries resulting error 400. Endpoint in GUI is set to 
> /fuseki/ds which works on other setups. Also sparql update works, error 
> occurs only on all select etc queries. Looking from browser developer 
> tools, query content-type is set to application/x-www-form-urlencoded. 
> Could that be the reason? There is no other info on the error, just code 
> 400. Fuseki is a bit old version 3.16.
> 
> 

What do the server logs say?

Application/x-www-form-urlencoded is normal from yasgui (it's a form 
POST with query= in the body).

400 is likely parse error including update sent to query endpoint.

     Andy