io.micrometer.core.ipc.http.HttpUrlConnectionSender Maven / Gradle / Ivy
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/**
* Copyright 2018 VMware, Inc.
*
* 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
*
* https://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 io.micrometer.core.ipc.http;
import io.micrometer.core.instrument.util.IOUtils;
import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.Proxy;
import java.time.Duration;
import java.util.Map;
/**
* {@link HttpURLConnection}-based {@link HttpSender}.
*
* @author Jon Schneider
* @author Johnny Lim
* @since 1.1.0
*/
public class HttpUrlConnectionSender implements HttpSender {
private static final int DEFAULT_CONNECT_TIMEOUT_MS = 1000;
private static final int DEFAULT_READ_TIMEOUT_MS = 10000;
private final int connectTimeoutMs;
private final int readTimeoutMs;
private final Proxy proxy;
/**
* Creates a sender with the specified timeouts but uses the default proxy settings.
*
* @param connectTimeout connect timeout when establishing a connection
* @param readTimeout read timeout when receiving a response
*/
public HttpUrlConnectionSender(Duration connectTimeout, Duration readTimeout) {
this(connectTimeout, readTimeout, null);
}
/**
* Creates a sender with the specified timeouts and proxy settings.
*
* @param connectTimeout connect timeout when establishing a connection
* @param readTimeout read timeout when receiving a response
* @param proxy proxy to use when establishing a connection
* @since 1.2.0
*/
public HttpUrlConnectionSender(Duration connectTimeout, Duration readTimeout, Proxy proxy) {
this.connectTimeoutMs = (int) connectTimeout.toMillis();
this.readTimeoutMs = (int) readTimeout.toMillis();
this.proxy = proxy;
}
/**
* Use the default timeouts and proxy settings for the sender.
*/
public HttpUrlConnectionSender() {
this.connectTimeoutMs = DEFAULT_CONNECT_TIMEOUT_MS;
this.readTimeoutMs = DEFAULT_READ_TIMEOUT_MS;
this.proxy = null;
}
@Override
public Response send(Request request) throws IOException {
HttpURLConnection con = null;
try {
if (proxy != null ) {
con = (HttpURLConnection) request.getUrl().openConnection(proxy);
} else {
con = (HttpURLConnection) request.getUrl().openConnection();
}
con.setConnectTimeout(connectTimeoutMs);
con.setReadTimeout(readTimeoutMs);
Method method = request.getMethod();
con.setRequestMethod(method.name());
for (Map.Entry header : request.getRequestHeaders().entrySet()) {
con.setRequestProperty(header.getKey(), header.getValue());
}
if (method != Method.GET) {
con.setDoOutput(true);
try (OutputStream os = con.getOutputStream()) {
os.write(request.getEntity());
os.flush();
}
}
int status = con.getResponseCode();
String body = null;
try {
if (con.getErrorStream() != null) {
body = IOUtils.toString(con.getErrorStream());
} else if (con.getInputStream() != null) {
body = IOUtils.toString(con.getInputStream());
}
} catch (IOException ignored) {
}
return new Response(status, body);
} finally {
try {
if (con != null) {
con.disconnect();
}
} catch (Exception ignore) {
}
}
}
}