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https://issues.apache.org/jira/browse/NIFI-5214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16509921#comment-16509921
]
ASF GitHub Bot commented on NIFI-5214:
--------------------------------------
Github user markap14 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2723#discussion_r194821972
--- Diff:
nifi-nar-bundles/nifi-standard-services/nifi-lookup-services-bundle/nifi-lookup-services/src/main/java/org/apache/nifi/lookup/RestLookupService.java
---
@@ -0,0 +1,467 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.nifi.lookup;
+
+import com.burgstaller.okhttp.AuthenticationCacheInterceptor;
+import com.burgstaller.okhttp.CachingAuthenticatorDecorator;
+import com.burgstaller.okhttp.digest.CachingAuthenticator;
+import com.burgstaller.okhttp.digest.DigestAuthenticator;
+import okhttp3.Credentials;
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+import okhttp3.ResponseBody;
+import org.apache.nifi.annotation.behavior.DynamicProperties;
+import org.apache.nifi.annotation.behavior.DynamicProperty;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnDisabled;
+import org.apache.nifi.annotation.lifecycle.OnEnabled;
+import org.apache.nifi.attribute.expression.language.PreparedQuery;
+import org.apache.nifi.attribute.expression.language.Query;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.Validator;
+import org.apache.nifi.controller.AbstractControllerService;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.expression.ExpressionLanguageScope;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.proxy.ProxyConfiguration;
+import org.apache.nifi.proxy.ProxyConfigurationService;
+import org.apache.nifi.proxy.ProxySpec;
+import org.apache.nifi.record.path.FieldValue;
+import org.apache.nifi.record.path.RecordPath;
+import org.apache.nifi.record.path.validation.RecordPathValidator;
+import org.apache.nifi.schema.access.SchemaNotFoundException;
+import org.apache.nifi.serialization.MalformedRecordException;
+import org.apache.nifi.serialization.RecordReader;
+import org.apache.nifi.serialization.RecordReaderFactory;
+import org.apache.nifi.serialization.SimpleRecordSchema;
+import org.apache.nifi.serialization.record.MapRecord;
+import org.apache.nifi.serialization.record.Record;
+import org.apache.nifi.serialization.record.RecordSchema;
+import org.apache.nifi.ssl.SSLContextService;
+import org.apache.nifi.util.StringUtils;
+
+import javax.net.ssl.SSLContext;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.Proxy;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import static org.apache.commons.lang3.StringUtils.trimToEmpty;
+
+@Tags({ "rest", "lookup", "json", "xml", "http" })
+@CapabilityDescription("Use a REST service to enrich records.")
+@DynamicProperties({
+ @DynamicProperty(name = "*", value = "*", description = "All dynamic
properties are added as HTTP headers with the name " +
+ "as the header name and the value as the header value.")
+})
+public class RestLookupService extends AbstractControllerService
implements RecordLookupService {
+ static final PropertyDescriptor BASE_URL = new
PropertyDescriptor.Builder()
+ .name("rest-lookup-base-url")
+ .displayName("Base URL")
+ .description("The base URL for the REST endpoint. Expression
language is evaluated against variable registry." +
+ " This property can be used to resolve environment
specific part of the URL." +
+ " The result string is prepended to the 'URL'." +
+ " See 'Additional Details' to see an example.")
+
.expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .required(false)
+ .addValidator(StandardValidators.NON_BLANK_VALIDATOR)
+ .build();
+
+ static final PropertyDescriptor URL = new PropertyDescriptor.Builder()
+ .name("rest-lookup-url")
+ .displayName("URL")
+ .description("The URL for the REST endpoint. Expression language
is evaluated against the lookup key/value pairs, " +
+ "not flowfile attributes or variable registry.")
+ .expressionLanguageSupported(ExpressionLanguageScope.NONE)
+ .required(true)
+ .addValidator(StandardValidators.NON_BLANK_VALIDATOR)
+ .build();
+
+ static final PropertyDescriptor RECORD_READER = new
PropertyDescriptor.Builder()
+ .name("rest-lookup-record-reader")
+ .displayName("Record Reader")
+ .description("The record reader to use for loading the payload and
handling it as a record set.")
+ .expressionLanguageSupported(ExpressionLanguageScope.NONE)
+ .identifiesControllerService(RecordReaderFactory.class)
+ .required(true)
+ .build();
+
+ static final PropertyDescriptor RECORD_PATH = new
PropertyDescriptor.Builder()
+ .name("rest-lookup-record-path")
+ .displayName("Record Path")
+ .description("An optional record path that can be used to define
where in a record to get the real data to merge " +
+ "into the record set to be enriched. See documentation for
examples of when this might be useful.")
+
.expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+ .addValidator(new RecordPathValidator())
+ .required(false)
+ .build();
+
+ static final PropertyDescriptor SSL_CONTEXT_SERVICE = new
PropertyDescriptor.Builder()
+ .name("rest-lookup-ssl-context-service")
+ .displayName("SSL Context Service")
+ .description("The SSL Context Service used to provide client
certificate information for TLS/SSL "
+ + "connections.")
+ .required(false)
+ .identifiesControllerService(SSLContextService.class)
+ .build();
+ public static final PropertyDescriptor PROP_BASIC_AUTH_USERNAME = new
PropertyDescriptor.Builder()
+ .name("rest-lookup-basic-auth-username")
+ .displayName("Basic Authentication Username")
+ .description("The username to be used by the client to
authenticate against the Remote URL. Cannot include control characters (0-31),
':', or DEL (127).")
+ .required(false)
+
.expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+
.addValidator(StandardValidators.createRegexMatchingValidator(Pattern.compile("^[\\x20-\\x39\\x3b-\\x7e\\x80-\\xff]+$")))
+ .build();
+
+ public static final PropertyDescriptor PROP_BASIC_AUTH_PASSWORD = new
PropertyDescriptor.Builder()
+ .name("rest-lookup-basic-auth-password")
+ .displayName("Basic Authentication Password")
+ .description("The password to be used by the client to
authenticate against the Remote URL.")
+ .required(false)
+ .sensitive(true)
+
.expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY)
+
.addValidator(StandardValidators.createRegexMatchingValidator(Pattern.compile("^[\\x20-\\x7e\\x80-\\xff]+$")))
+ .build();
+ public static final PropertyDescriptor PROP_DIGEST_AUTH = new
PropertyDescriptor.Builder()
+ .name("rest-lookup-digest-auth")
+ .displayName("Use Digest Authentication")
+ .description("Whether to communicate with the website using Digest
Authentication. 'Basic Authentication Username' and 'Basic Authentication
Password' are used "
+ + "for authentication.")
+ .required(false)
+ .defaultValue("false")
+ .allowableValues("true", "false")
+ .build();
+
+ private static final ProxySpec[] PROXY_SPECS = {ProxySpec.HTTP_AUTH,
ProxySpec.SOCKS};
+ public static final PropertyDescriptor PROXY_CONFIGURATION_SERVICE
+ = ProxyConfiguration.createProxyConfigPropertyDescriptor(true,
PROXY_SPECS);
+
+ static final String MIME_TYPE_KEY = "mime.type";
+ static final String BODY_KEY = "request.body";
+ static final String METHOD_KEY = "request.method";
+
+ static final List<PropertyDescriptor> DESCRIPTORS;
+ static final Set<String> KEYS;
+
+ static final List VALID_VERBS = Arrays.asList("delete", "get", "post",
"put");
+
+ static {
+ DESCRIPTORS = Collections.unmodifiableList(Arrays.asList(
+ BASE_URL,
+ URL,
+ RECORD_READER,
+ RECORD_PATH,
+ SSL_CONTEXT_SERVICE,
+ PROXY_CONFIGURATION_SERVICE,
+ PROP_BASIC_AUTH_USERNAME,
+ PROP_BASIC_AUTH_PASSWORD,
+ PROP_DIGEST_AUTH
+ ));
+ KEYS = Collections.emptySet();
+ }
+
+ protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
+ return DESCRIPTORS;
+ }
+
+ private ProxyConfigurationService proxyConfigurationService;
+ private RecordReaderFactory readerFactory;
+ private RecordPath recordPath;
+ private OkHttpClient client;
+ private Map<String, String> headers;
+ private volatile PreparedQuery compiledQuery;
+ private volatile String basicUser;
+ private volatile String basicPass;
+ private volatile boolean isDigest;
+
+ @OnEnabled
+ public void onEnabled(final ConfigurationContext context) {
+ readerFactory =
context.getProperty(RECORD_READER).asControllerService(RecordReaderFactory.class);
+ proxyConfigurationService =
context.getProperty(PROXY_CONFIGURATION_SERVICE)
+ .asControllerService(ProxyConfigurationService.class);
+
+ OkHttpClient.Builder builder = new OkHttpClient.Builder();
+
+ setAuthenticator(builder, context);
+
+ if (proxyConfigurationService != null) {
+ setProxy(builder);
+ }
+
+ final SSLContextService sslService =
context.getProperty(SSL_CONTEXT_SERVICE).asControllerService(SSLContextService.class);
+ final SSLContext sslContext = sslService == null ? null :
sslService.createSSLContext(SSLContextService.ClientAuth.WANT);
+ if (sslService != null) {
+ builder.sslSocketFactory(sslContext.getSocketFactory());
+ }
+
+ client = builder.build();
+
+ String path = context.getProperty(RECORD_PATH).isSet() ?
context.getProperty(RECORD_PATH).getValue() : null;
+ if (!StringUtils.isBlank(path)) {
--- End diff --
If the user sets a RecordPath, enables the service, then disables the
service, and removes the RecordPath, then this is going to keep evaluating the
RecordPath. Believe we need an `} else { recordPath = null; }` clause in there
> Add a REST lookup service
> -------------------------
>
> Key: NIFI-5214
> URL: https://issues.apache.org/jira/browse/NIFI-5214
> Project: Apache NiFi
> Issue Type: New Feature
> Reporter: Mike Thomsen
> Assignee: Mike Thomsen
> Priority: Major
>
> * Should have reader API support
> * Should be able to drill down through complex XML and JSON responses to a
> nested record.
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