1 files changed, 157 insertions, 0 deletions
diff --git a/common/src/main/java/org/openecomp/mso/client/policy/LoggingFilter.java b/common/src/main/java/org/openecomp/mso/client/policy/LoggingFilter.java
new file mode 100644
index 0000000000..b04069697e
--- /dev/null
+++ b/common/src/main/java/org/openecomp/mso/client/policy/LoggingFilter.java
@@ -0,0 +1,157 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.mso.client.policy;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.FilterOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+
+import javax.annotation.Priority;
+import javax.ws.rs.WebApplicationException;
+import javax.ws.rs.client.ClientRequestContext;
+import javax.ws.rs.client.ClientRequestFilter;
+import javax.ws.rs.client.ClientResponseContext;
+import javax.ws.rs.client.ClientResponseFilter;
+import javax.ws.rs.ext.Provider;
+import javax.ws.rs.ext.WriterInterceptor;
+import javax.ws.rs.ext.WriterInterceptorContext;
+
+import org.openecomp.mso.logger.MsoLogger;
+
+
+@Provider
+@Priority(0)
+public class LoggingFilter implements ClientRequestFilter, ClientResponseFilter, WriterInterceptor {
+
+	private static final MsoLogger logger = MsoLogger.getMsoLogger(MsoLogger.Catalog.BPEL);
+	private static final String ENTITY_STREAM_PROPERTY = "LoggingFilter.entityStream";
+	private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;
+	private final int maxEntitySize;
+
+	public LoggingFilter() {
+		maxEntitySize = 1024 * 1024;
+	}
+
+	public LoggingFilter(int maxPayloadSize) {
+		this.maxEntitySize = Integer.min(maxPayloadSize, 1024 * 1024);
+	}
+
+	private void log(StringBuilder sb) {
+		logger.debug(sb.toString());
+	}
+
+	protected InputStream logInboundEntity(final StringBuilder b, InputStream stream, final Charset charset)
+			throws IOException {
+		if (!stream.markSupported()) {
+			stream = new BufferedInputStream(stream);
+		}
+		stream.mark(maxEntitySize + 1);
+		final byte[] entity = new byte[maxEntitySize + 1];
+		final int entitySize = stream.read(entity);
+		if (entitySize != -1) {
+			b.append(new String(entity, 0, Math.min(entitySize, maxEntitySize), charset));
+		}
+		if (entitySize > maxEntitySize) {
+			b.append("...more...");
+		}
+		b.append('\n');
+		stream.reset();
+		return stream;
+	}
+
+	@Override
+	public void filter(ClientRequestContext requestContext) throws IOException {
+		if (requestContext.hasEntity()) {
+			final OutputStream stream = new LoggingStream(requestContext.getEntityStream());
+			requestContext.setEntityStream(stream);
+			requestContext.setProperty(ENTITY_STREAM_PROPERTY, stream);
+		}
+		String method = formatMethod(requestContext);
+		log(new StringBuilder("Making " + method + " request to: " + requestContext.getUri() + "\nRequest Headers: " + requestContext.getHeaders().toString()));
+
+	}
+
+	@Override
+	public void filter(ClientRequestContext requestContext, ClientResponseContext responseContext) throws IOException {
+		final StringBuilder sb = new StringBuilder();
+		if (responseContext.hasEntity()) {
+			responseContext.setEntityStream(logInboundEntity(sb, responseContext.getEntityStream(), DEFAULT_CHARSET));
+			String method = formatMethod(requestContext);
+			log(sb.insert(0, "Response from " + method + ": " + requestContext.getUri() + "\nResponse Headers: " + responseContext.getHeaders().toString()));
+		}
+	}
+
+	@Override
+	public void aroundWriteTo(WriterInterceptorContext context) throws IOException, WebApplicationException {
+		final LoggingStream stream = (LoggingStream) context.getProperty(ENTITY_STREAM_PROPERTY);
+		context.proceed();
+		if (stream != null) {
+			log(stream.getStringBuilder(DEFAULT_CHARSET));
+		}
+	}
+
+	private class LoggingStream extends FilterOutputStream {
+
+		private final StringBuilder sb = new StringBuilder();
+		private final ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+		LoggingStream(OutputStream out) {
+			super(out);
+		}
+
+		StringBuilder getStringBuilder(Charset charset) {
+			// write entity to the builder
+			final byte[] entity = baos.toByteArray();
+
+			sb.append(new String(entity, 0, entity.length, charset));
+			if (entity.length > maxEntitySize) {
+				sb.append("...more...");
+			}
+			sb.append('\n');
+
+			return sb;
+		}
+
+		@Override
+		public void write(final int i) throws IOException {
+			if (baos.size() <= maxEntitySize) {
+				baos.write(i);
+			}
+			out.write(i);
+		}
+	}
+	
+	private String formatMethod(ClientRequestContext requestContext) {
+		String method = requestContext.getHeaderString("X-HTTP-Method-Override");
+		if (method == null) {
+			method = requestContext.getMethod();
+		} else {
+			method = requestContext.getMethod() + " (overridden to " + method + ")";
+		}
+		
+		return method;
+	}
+}
+\ No newline at end of file