Trifid plugin for sparql-proxy

Quick start

Install this Trifid plugin using:

``sh
npm install @zazuko/trifid-plugin-sparql-proxy
`

And then add in the config.yaml file the following part:

`yaml
plugins:
# […] your other plugins
sparql-proxy:
module: "@zazuko/trifid-plugin-sparql-proxy"
paths: /query
config:
# The endpoint URL is the only required field
endpointUrl: https://example.com/query

# In case your endpoint requires authentication:
username: admin
password: secret
# headers: # Optional headers to be sent with each request
# X-Custom-Header: "CustomValue"

# # In case you want to add support for multiple endpoints
# # Define the endpoints in the following way (the "default" endpoint is required)
# # The default endpoint value will override the endpointUrl, username, password and headers values
# endpoints:
# default:
# endpointUrl: https://example.com/query
# username: admin1
# password: secret1
# headers:
# X-Custom-Header: "CustomValueDefault"
# other:
# endpointUrl: https://example.com/other-query
# username: admin2
# password: secret2
# headers:
# X-Custom-Header: "CustomValueOther"

# Rewriting configuration
allowRewriteToggle: true # Allow the user to toggle the rewrite configuration using the rewrite query parameter, even if rewrite is set to false
rewrite: false # Rewrite by default
rewriteQuery: true # Allow rewriting the query (in case of rewriting)
rewriteResults: true # Allow rewriting the results (in case of rewriting)

# Configure formats, that can be used as format query parameter
formats:
ttl: "text/turtle"
jsonld: "application/ld+json"
xml: "application/rdf+xml"
nt: "application/n-triples"
trig: "application/trig"
csv: "text/csv"

# Configure the log level for the queries
queryLogLevel: debug # Log level for the queries
``