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/*
* 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.skywalking.apm.plugin.httpclient.v3;
import java.lang.reflect.Method;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.URI;
import org.apache.commons.httpclient.URIException;
import org.apache.skywalking.apm.agent.core.context.CarrierItem;
import org.apache.skywalking.apm.agent.core.context.ContextCarrier;
import org.apache.skywalking.apm.agent.core.context.ContextManager;
import org.apache.skywalking.apm.agent.core.context.tag.Tags;
import org.apache.skywalking.apm.agent.core.context.trace.AbstractSpan;
import org.apache.skywalking.apm.agent.core.context.trace.SpanLayer;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
import org.apache.skywalking.apm.network.trace.component.ComponentsDefine;
import org.apache.skywalking.apm.plugin.httpclient.HttpClientPluginConfig;
import org.apache.skywalking.apm.util.StringUtil;
public class HttpClientExecuteInterceptor implements InstanceMethodsAroundInterceptor {
@Override
public void beforeMethod(final EnhancedInstance objInst, final Method method, final Object[] allArguments,
final Class<?>[] argumentsTypes, final MethodInterceptResult result) throws Throwable {
final HttpMethod httpMethod = (HttpMethod) allArguments[1];
if (httpMethod == null) {
return;
}
final String remotePeer = httpMethod.getURI().getHost() + ":" + httpMethod.getURI().getPort();
final URI uri = httpMethod.getURI();
final String requestURI = getRequestURI(uri);
final ContextCarrier contextCarrier = new ContextCarrier();
final AbstractSpan span = ContextManager.createExitSpan(requestURI, contextCarrier, remotePeer);
span.setComponent(ComponentsDefine.HTTPCLIENT);
Tags.URL.set(span, uri.toString());
Tags.HTTP.METHOD.set(span, httpMethod.getName());
SpanLayer.asHttp(span);
for (CarrierItem next = contextCarrier.items(); next.hasNext(); ) {
next = next.next();
httpMethod.setRequestHeader(next.getHeadKey(), next.getHeadValue());
}
if (HttpClientPluginConfig.Plugin.HttpClient.COLLECT_HTTP_PARAMS) {
collectHttpParam(httpMethod, span);
}
}
@Override
public Object afterMethod(final EnhancedInstance objInst, final Method method, final Object[] allArguments,
final Class<?>[] argumentsTypes, final Object ret) {
if (ret != null) {
final int statusCode = (Integer) ret;
final AbstractSpan span = ContextManager.activeSpan();
if (statusCode >= 400) {
span.errorOccurred();
Tags.STATUS_CODE.set(span, Integer.toString(statusCode));
}
final HttpMethod httpMethod = (HttpMethod) allArguments[1];
if (httpMethod == null) {
return ret;
}
// Active HTTP parameter collection automatically in the profiling context.
if (!HttpClientPluginConfig.Plugin.HttpClient.COLLECT_HTTP_PARAMS && span.isProfiling()) {
collectHttpParam(httpMethod, span);
}
}
ContextManager.stopSpan();
return ret;
}
@Override
public void handleMethodException(final EnhancedInstance objInst, final Method method, final Object[] allArguments,
final Class<?>[] argumentsTypes, final Throwable t) {
ContextManager.activeSpan().log(t);
}
private String getRequestURI(URI uri) throws URIException {
String requestPath = uri.getPath();
return requestPath != null && requestPath.length() > 0 ? requestPath : "/";
}
private void collectHttpParam(HttpMethod httpMethod, AbstractSpan span) {
String tagValue = httpMethod.getQueryString();
if (StringUtil.isNotEmpty(tagValue)) {
tagValue = HttpClientPluginConfig.Plugin.Http.HTTP_PARAMS_LENGTH_THRESHOLD > 0 ?
StringUtil.cut(tagValue, HttpClientPluginConfig.Plugin.Http.HTTP_PARAMS_LENGTH_THRESHOLD) :
tagValue;
Tags.HTTP.PARAMS.set(span, tagValue);
}
}
}