#!/bin/bash # Deploys a stub SPARQL endpoint that serves canned SPARQL XML results. # # The triplestores deployed by the other scripts in this directory all answer # correctly, which is exactly why they cannot cover what rdf_fdw does with a # malformed or hostile response. A real endpoint never repeats a variable # inside a single , for instance, so the only way to test that the # extension survives one is to serve the response ourselves. # # The responses are static, so nginx serves them straight from disk. rdf_fdw # sends SPARQL SELECT queries as POST, which a static file server answers with # 405, hence the error_page directive below that serves the file anyway. NETWORK_NAME=pgnet CONTAINER_NAME=stub-endpoint CONTAINER_IP=172.19.42.102 echo -e "\n== Deploying stub SPARQL endpoint ==\n" podman stop $CONTAINER_NAME 2>/dev/null || true podman rm $CONTAINER_NAME 2>/dev/null || true cat > /tmp/stub-endpoint.conf < carrying 400 bindings for the same variable. A response like # this used to make InsertRetrievedData() advance its column index once per # binding rather than once per column, writing past the end of the three # arrays it sizes by the number of foreign table columns. BINDING='x' DUPLICATES="" for _ in $(seq 1 400); do DUPLICATES="$DUPLICATES$BINDING" done printf '%s%s' \ "$XML_HEAD" "$DUPLICATES" > /tmp/stub-repeated-binding.xml # The same shape, but well formed: one binding for the one variable. printf '%s%s' \ "$XML_HEAD" "$BINDING" > /tmp/stub-single-binding.xml # A whose text is broken into several XML child nodes. A CDATA # section or a comment inside the element splits the character data around it, # so reading only the first child returns the text up to the split and drops # the rest. Endpoints in the wild answer with a single text node, which is why # no test against a real triplestore can produce this. SPLIT_TEXT='' SPLIT_TEXT=$SPLIT_TEXT'abcghi' SPLIT_TEXT=$SPLIT_TEXT'abcdef' SPLIT_TEXT=$SPLIT_TEXT'' SPLIT_TEXT=$SPLIT_TEXT'one' SPLIT_TEXT=$SPLIT_TEXT'' printf '%s%s' "$XML_HEAD" "$SPLIT_TEXT" > /tmp/stub-split-text.xml # One row exercising each RDF node type, to check that a clone preserves them. printf '%shttp://example.org/thingb1hello' \ "$XML_HEAD" > /tmp/stub-node-types.xml # Literals holding a backslash and quotes. The XML carries the value itself -- # a backslash in it is a character, not the start of an escape -- which a store # that holds C:\temp answers with exactly as written here. BACKSLASH='' BACKSLASH=$BACKSLASH'C:\temp' BACKSLASH=$BACKSLASH'a\nb' BACKSLASH=$BACKSLASH'back\\slash' BACKSLASH=$BACKSLASH'"said" \ done' BACKSLASH=$BACKSLASH'' printf '%s%s' "$XML_HEAD" "$BACKSLASH" > /tmp/stub-backslash.xml # The same values in a DESCRIBE answer. cat > /tmp/stub-describe-backslash.xml <<'XMLEOF' C:\temp a\nb "said" \ done XMLEOF # A DESCRIBE answer, which is RDF/XML rather than SPARQL results XML. The # subject of an rdf:Description is an IRI when it carries rdf:about and a blank # node when it carries rdf:nodeID; a store only emits the second when the # described resource actually reaches a blank node, and the labels it picks are # its own, so a stable test needs the answer written out here. cat > /tmp/stub-describe-bnode.xml <<'XMLEOF' a blank node a description of nothing named Alice 42 XMLEOF podman run -d --name $CONTAINER_NAME \ --network $NETWORK_NAME \ --ip $CONTAINER_IP \ --no-hosts \ -v /tmp/stub-endpoint.conf:/etc/nginx/conf.d/default.conf:ro,z \ -v /tmp/stub-repeated-binding.xml:/usr/share/nginx/html/repeated-binding.xml:ro,z \ -v /tmp/stub-single-binding.xml:/usr/share/nginx/html/single-binding.xml:ro,z \ -v /tmp/stub-node-types.xml:/usr/share/nginx/html/node-types.xml:ro,z \ -v /tmp/stub-split-text.xml:/usr/share/nginx/html/split-text.xml:ro,z \ -v /tmp/stub-describe-bnode.xml:/usr/share/nginx/html/describe-bnode.xml:ro,z \ -v /tmp/stub-backslash.xml:/usr/share/nginx/html/backslash.xml:ro,z \ -v /tmp/stub-describe-backslash.xml:/usr/share/nginx/html/describe-backslash.xml:ro,z \ docker.io/library/nginx:alpine echo "Waiting for the stub endpoint to start..." sleep 1 if podman exec $CONTAINER_NAME wget -qO- http://127.0.0.1/single-binding.xml >/dev/null 2>&1; then echo "Stub SPARQL endpoint is ready!" else echo "ERROR: stub SPARQL endpoint failed to start" podman logs $CONTAINER_NAME exit 1 fi