com.formkiq.lambda.runtime.graalvm.HttpClient Maven / Gradle / Ivy
/**
* Copyright [2020] FormKiQ 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
*
* 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 com.formkiq.lambda.runtime.graalvm;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
/** Http Service using the build in Java {@link HttpURLConnection} library. */
public class HttpClient {
/**
* Send 'Get' request.
*
* @param url {@link String}
* @return {@link HttpResponse}
* @throws IOException IOException
*/
public static HttpResponse get(final String url) throws IOException {
URL u = new URL(url);
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
conn.setRequestMethod("GET");
return buildResponse(conn);
}
/**
* Build {@link HttpResponse} from {@link HttpURLConnection}.
*
* @param conn {@link HttpURLConnection}
* @return {@link HttpResponse}
* @throws IOException IOException
*/
private static HttpResponse buildResponse(final HttpURLConnection conn) throws IOException {
HttpResponse response = new HttpResponse(conn.getResponseCode());
conn.getHeaderFields()
.entrySet()
.forEach(
e -> {
if (e.getKey() != null && e.getValue() != null) {
response.addHeader(e.getKey(), e.getValue());
}
});
StringBuilder sb = new StringBuilder();
BufferedReader br =
new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
String line = null;
while ((line = br.readLine()) != null) {
sb.append(line);
}
br.close();
response.setBody(sb.toString());
return response;
}
/**
* Send Http POST.
*
* @param url {@link String}
* @param body {@link String}
* @return {@link HttpResponse}
* @throws IOException IOException
*/
public static HttpResponse post(final String url, final String body) throws IOException {
URL u = new URL(url);
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
OutputStreamWriter response =
new OutputStreamWriter(conn.getOutputStream(), StandardCharsets.UTF_8);
response.write(body);
response.flush();
response.close();
conn.connect();
return new HttpResponse(conn.getResponseCode());
}
}