New CLI command for PATCH requests

Author: namedgraph

bin/patch.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+
+print_usage()
+{
+    printf "Patches an RDF document using SPARQL update.\n"
+    printf "\n"
+    printf "Usage:  cat update.rq | %s options TARGET_URI\n" "$0"
+    printf "\n"
+    printf "Options:\n"
+    printf "  -f, --cert-pem-file CERT_FILE        .pem file with the WebID certificate of the agent\n"
+    printf "  -p, --cert-password CERT_PASSWORD    Password of the WebID certificate\n"
+    printf "  --proxy PROXY_URL                    The host this request will be proxied through (optional)\n"
+}
+
+hash turtle 2>/dev/null || { echo >&2 "turtle not on \$PATH.  Aborting."; exit 1; }
+hash curl 2>/dev/null || { echo >&2 "curl not on \$PATH. Aborting."; exit 1; }
+
+unknown=()
+while [[ $# -gt 0 ]]
+do
+    key="$1"
+
+    case $key in
+        -f|--cert-pem-file)
+        cert_pem_file="$2"
+        shift # past argument
+        shift # past value
+        ;;
+        -p|--cert-password)
+        cert_password="$2"
+        shift # past argument
+        shift # past value
+        ;;
+        --proxy)
+        proxy="$2"
+        shift # past argument
+        shift # past value
+        ;;
+        *)    # unknown option
+        unknown+=("$1") # save it in an array for later
+        shift # past argument
+        ;;
+    esac
+done
+set -- "${unknown[@]}" # restore args
+
+if [ -z "$cert_pem_file" ] ; then
+    print_usage
+    exit 1
+fi
+if [ -z "$cert_password" ] ; then
+    print_usage
+    exit 1
+fi
+if [ "$#" -ne 1 ]; then
+    print_usage
+    exit 1
+fi
+
+url="$1"
+
+if [ -n "$proxy" ]; then
+    # rewrite target hostname to proxy hostname
+    url_host=$(echo "$url" | cut -d '/' -f 1,2,3)
+    proxy_host=$(echo "$proxy" | cut -d '/' -f 1,2,3)
+    final_url="${url/$url_host/$proxy_host}"
+else
+    final_url="$url"
+fi
+
+# resolve SPARQL update from stdin against base URL and PATCH it to the server
+# uparse currently does not support --base: https://github.com/apache/jena/issues/3296
+cat - | curl -v -k -E "$cert_pem_file":"$cert_password" --data-binary @- -H "Content-Type: application/sparql-update" -X PATCH -o /dev/null "$final_url"

src/main/java/com/atomgraph/linkeddatahub/resource/Graph.java

@@ -318,7 +318,7 @@ public Response patch(UpdateRequest updateRequest, @QueryParam("graph") URI grap
         if (log.isDebugEnabled()) log.debug("PATCH request on named graph with URI: {}", getURI());
         if (log.isDebugEnabled()) log.debug("PATCH update string: {}", updateRequest.toString());
 
-        if (updateRequest.getOperations().size() > 1)
+        if (updateRequest.getOperations().size() != 1)
             throw new WebApplicationException("Only a single SPARQL Update is supported by PATCH", UNPROCESSABLE_ENTITY.getStatusCode()); // 422 Unprocessable Entity
 
         Update update = updateRequest.getOperations().get(0);