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org.tsugi.http.HttpClientUtil Maven / Gradle / Ivy
/*
* Copyright (c) 2020- Charles R. Severance
*
* 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 org.tsugi.http;
import java.lang.StringBuffer;
import java.io.InputStream;
import java.net.URI;
import java.net.URLEncoder;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;
import java.util.Enumeration;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.Cookie;
import org.tsugi.http.HttpUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
/*
*
* A Java-11 HTTP utility based on
*
* https://mkyong.com/java/how-to-send-http-request-getpost-in-java/
* https://docs.oracle.com/en/java/javase/11/docs/api/java.net.http/java/net/http/HttpResponse.BodyHandlers.html
*/
@SuppressWarnings("deprecation")
@Slf4j
public class HttpClientUtil {
public static HttpRequest setupGet(String url, Map parameters, Map headers, StringBuffer dbs) throws Exception {
String getUrl = HttpUtil.augmentGetURL(url, parameters);
if ( dbs != null ) {
dbs.append("setupGet url ");
dbs.append(getUrl);
dbs.append("\n");
}
HttpRequest.Builder builder = HttpRequest.newBuilder()
.GET()
.uri(URI.create(getUrl))
// .timeout(10)
.header("User-Agent", "org.tsugi.http.HttpClientUtil web service request");
if ( headers != null ) {
if ( dbs != null && headers.size() > 0 ) {
dbs.append("headers\n");
dbs.append(headers.toString());
dbs.append("\n");
}
for (Map.Entry entry : headers.entrySet()) {
builder.setHeader(entry.getKey().toString(), entry.getValue().toString());
}
}
HttpRequest request = builder.build();
return request;
}
public static HttpClient getClient() {
HttpClient httpClient = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_1_1)
.build();
return httpClient;
}
public static HttpResponse sendGet(String url, Map parameters, Map headers, StringBuffer dbs) throws Exception {
HttpRequest request = setupGet(url, parameters, headers, dbs);
HttpResponse response = getClient().send(request, HttpResponse.BodyHandlers.ofString());
if ( dbs != null ) {
dbs.append("http status=");
dbs.append(response.statusCode());
dbs.append("\n");
}
return response;
}
public static HttpResponse sendGetStream(String url, Map parameters, Map headers, StringBuffer dbs) throws Exception {
HttpRequest request = setupGet(url, parameters, headers, dbs);
HttpResponse response = getClient().send(request, HttpResponse.BodyHandlers.ofInputStream());
if ( dbs != null ) {
dbs.append("http status=");
dbs.append(response.statusCode());
dbs.append("\n");
}
return response;
}
// Convenience method
public static HttpResponse sendPost(String url, Map data, Map headers, StringBuffer dbs) throws Exception {
return sendBody("POST", url, data, headers, dbs);
}
// Convenience method
public static HttpResponse sendPost(String url, String data, Map headers, StringBuffer dbs) throws Exception {
return sendBody("POST", url, data, headers, dbs);
}
// Key/value body
public static HttpResponse sendBody(String method, String url, Map data, Map headers, StringBuffer dbs) throws Exception {
HttpRequest.BodyPublisher body = buildFormDataFromMap(data, dbs);
if ( headers == null ) headers = new HashMap();
if ( headers.get("Content-Type") == null ) headers.put("Content-Type", "application/x-www-form-urlencoded");
return sendBody(method, url, body, headers, dbs);
}
// Straight up text body
public static HttpResponse sendBody(String method, String url, String data, Map headers, StringBuffer dbs) throws Exception {
if ( dbs != null && data != null && data.length() > 0 ) {
dbs.append("sendPost data\n");
dbs.append(StringUtils.truncate(data, 1000));
dbs.append("\n");
}
HttpRequest.BodyPublisher body = HttpRequest.BodyPublishers.ofString(data);
if ( headers == null ) headers = new HashMap();
return sendBody(method, url, body, headers, dbs);
}
public static HttpResponse sendBody(String method, String url, HttpRequest.BodyPublisher body, Map headers, StringBuffer dbs) throws Exception {
HttpRequest.Builder builder = HttpRequest.newBuilder()
.method(method, body)
// .timeout(10)
.uri(URI.create(url))
.header("User-Agent", "org.tsugi.http.HttpClientUtil web service request");
if ( dbs != null ) {
dbs.append("send");
dbs.append(method);
dbs.append(" url ");
dbs.append(url);
dbs.append("\n");
}
if ( headers != null ) {
if ( dbs != null && headers.size() > 0 ) {
dbs.append("headers\n");
dbs.append(headers.toString());
dbs.append("\n");
}
for (Map.Entry entry : headers.entrySet()) {
builder.setHeader(entry.getKey().toString(), entry.getValue().toString());
}
}
HttpRequest request = builder.build();
HttpClient httpClient = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_1_1)
.build();
HttpResponse response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
if ( dbs != null ) {
dbs.append("http status=");
dbs.append(response.statusCode());
dbs.append("\n");
}
return response;
}
private static HttpRequest.BodyPublisher buildFormDataFromMap(Map data, StringBuffer dbs) {
if ( data == null || data.size() < 1 ) return null;
var builder = new StringBuilder();
for (Map.Entry entry : data.entrySet()) {
if (builder.length() > 0) {
builder.append("&");
}
builder.append(URLEncoder.encode(entry.getKey().toString(), StandardCharsets.UTF_8));
builder.append("=");
builder.append(URLEncoder.encode(entry.getValue().toString(), StandardCharsets.UTF_8));
}
if ( dbs != null ) {
dbs.append("request builder: ");
dbs.append(builder.toString());
dbs.append("\n");
}
return HttpRequest.BodyPublishers.ofString(builder.toString());
}
}
