io.opentelemetry.javaagent.instrumentation.netty.v3_8.client.NettyHttpClientAttributesGetter Maven / Gradle / Ivy

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/*
 * Copyright The OpenTelemetry Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package io.opentelemetry.javaagent.instrumentation.netty.v3_8.client;

import static io.opentelemetry.javaagent.instrumentation.netty.v3_8.util.HttpSchemeUtil.getScheme;

import io.opentelemetry.instrumentation.api.instrumenter.http.HttpClientAttributesGetter;
import io.opentelemetry.javaagent.instrumentation.netty.v3_8.HttpRequestAndChannel;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import javax.annotation.Nullable;
import org.jboss.netty.handler.codec.http.HttpResponse;

final class NettyHttpClientAttributesGetter
    implements HttpClientAttributesGetter {

  @Override
  @Nullable
  public String url(HttpRequestAndChannel requestAndChannel) {
    try {
      String hostHeader = getHost(requestAndChannel);
      String target = requestAndChannel.request().getUri();
      URI uri = new URI(target);
      if ((uri.getHost() == null || uri.getHost().equals("")) && hostHeader != null) {
        return getScheme(requestAndChannel) + "://" + hostHeader + target;
      }
      return uri.toString();
    } catch (URISyntaxException e) {
      return null;
    }
  }

  private String getHost(HttpRequestAndChannel requestAndChannel) {
    List values = requestHeader(requestAndChannel, "host");
    return values.isEmpty() ? null : values.get(0);
  }

  @Override
  public String flavor(HttpRequestAndChannel requestAndChannel, @Nullable HttpResponse response) {
    String flavor = requestAndChannel.request().getProtocolVersion().toString();
    if (flavor.startsWith("HTTP/")) {
      flavor = flavor.substring("HTTP/".length());
    }
    return flavor;
  }

  @Override
  public String method(HttpRequestAndChannel requestAndChannel) {
    return requestAndChannel.request().getMethod().getName();
  }

  @Override
  public List requestHeader(HttpRequestAndChannel requestAndChannel, String name) {
    return requestAndChannel.request().headers().getAll(name);
  }

  @Override
  public Integer statusCode(
      HttpRequestAndChannel requestAndChannel, HttpResponse response, @Nullable Throwable error) {
    return response.getStatus().getCode();
  }

  @Override
  public List responseHeader(
      HttpRequestAndChannel requestAndChannel, HttpResponse response, String name) {
    return response.headers().getAll(name);
  }
}