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vaimee / SEPA

Get notifications about changes in your SPARQL endpoint.
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404 WebSocket Upgrade Failure #56

Closed yasirhm closed 4 years ago

yasirhm commented 4 years ago

404 WebSocket Upgrade Failure I have built the maven project successfully, However after running the engine, and trying to subscribe, I get the error that 404 WebSocket Upgrade Failure.

To Reproduce Steps to reproduce the behavior:

  1. SEPA/json-ld
  2. mvn clean install
  3. Run engine
  4. go to http://127.0.0.1:9000/
  5. See the error

System information(please complete the following information):

Additional context If there is something that I'm missing, please let me know.

lroffia commented 4 years ago

These are the endpoints provided by SEPA:

SPARQL 1.1 Protocol (https://www.w3.org/TR/sparql11-protocol/)
----------------------
SPARQL 1.1 Query     | http://localhost:8000/query
SPARQL 1.1 Update    | http://localhost:8000/update
----------------------

SPARQL 1.1 SE Protocol (http://mml.arces.unibo.it/TR/sparql11-se-protocol.html)
----------------------
SPARQL 1.1 Subscribe | ws://localhost:9000/subscribe
----------------------

So to use subscriptions you should go to the following: ws://localhost:9000/subscribe

Also you need a websocket client like the following: https://github.com/hakobera/Simple-WebSocket-Client

yasirhm commented 4 years ago

Thank you. Issue was in WebSocket.