/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* 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.keycloak.broker.provider.util;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSocketFactory;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.StringWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.GZIPInputStream;
/**
* @author <a href="mailto:sthorger@redhat.com">Stian Thorgersen</a>
* @author Vlastimil Elias (velias at redhat dot com)
*/
public class SimpleHttp {
private String url;
private String method;
private Map<String, String> headers;
private Map<String, String> params;
private SSLSocketFactory sslFactory;
private HostnameVerifier hostnameVerifier;
protected SimpleHttp(String url, String method) {
this.url = url;
this.method = method;
}
public static SimpleHttp doGet(String url) {
return new SimpleHttp(url, "GET");
}
public static SimpleHttp doPost(String url) {
return new SimpleHttp(url, "POST");
}
public SimpleHttp header(String name, String value) {
if (headers == null) {
headers = new HashMap<String, String>();
}
headers.put(name, value);
return this;
}
public SimpleHttp param(String name, String value) {
if (params == null) {
params = new HashMap<String, String>();
}
params.put(name, value);
return this;
}
public SimpleHttp sslFactory(SSLSocketFactory factory) {
sslFactory = factory;
return this;
}
public SimpleHttp hostnameVerifier(HostnameVerifier verifier) {
hostnameVerifier = verifier;
return this;
}
public String asString() throws IOException {
boolean get = method.equals("GET");
boolean post = method.equals("POST");
StringBuilder sb = new StringBuilder();
if (get) {
sb.append(url);
}
if (params != null) {
boolean f = true;
for (Map.Entry<String, String> p : params.entrySet()) {
if (f) {
f = false;
if (get) {
sb.append("?");
}
} else {
sb.append("&");
}
sb.append(URLEncoder.encode(p.getKey(), "UTF-8"));
sb.append("=");
sb.append(URLEncoder.encode(p.getValue(), "UTF-8"));
}
}
if (get) {
url = sb.toString();
}
HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
setupTruststoreIfApplicable(connection);
OutputStream os = null;
InputStream is = null;
try {
connection.setRequestMethod(method);
if (headers != null) {
for (Map.Entry<String, String> h : headers.entrySet()) {
connection.setRequestProperty(h.getKey(), h.getValue());
}
}
if (post) {
String data = sb.toString();
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", String.valueOf(data.length()));
os = connection.getOutputStream();
os.write(data.getBytes());
} else {
connection.setDoOutput(false);
}
String ce = connection.getHeaderField("Content-Encoding");
is = connection.getInputStream();
if ("gzip".equals(ce)) {
is = new GZIPInputStream(is);
}
return toString(is);
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
}
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
}
}
if (connection != null) {
try {
connection.disconnect();
} catch (Exception e) {
}
}
}
}
public int asStatus() throws IOException {
boolean get = method.equals("GET");
boolean post = method.equals("POST");
StringBuilder sb = new StringBuilder();
if (get) {
sb.append(url);
}
if (params != null) {
boolean f = true;
for (Map.Entry<String, String> p : params.entrySet()) {
if (f) {
f = false;
if (get) {
sb.append("?");
}
} else {
sb.append("&");
}
sb.append(URLEncoder.encode(p.getKey(), "UTF-8"));
sb.append("=");
sb.append(URLEncoder.encode(p.getValue(), "UTF-8"));
}
}
if (get) {
url = sb.toString();
}
HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
setupTruststoreIfApplicable(connection);
OutputStream os = null;
InputStream is = null;
try {
connection.setRequestMethod(method);
if (headers != null) {
for (Map.Entry<String, String> h : headers.entrySet()) {
connection.setRequestProperty(h.getKey(), h.getValue());
}
}
if (post) {
String data = sb.toString();
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", String.valueOf(data.length()));
os = connection.getOutputStream();
os.write(data.getBytes());
} else {
connection.setDoOutput(false);
}
is = connection.getInputStream();
return connection.getResponseCode();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
}
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
}
}
if (connection != null) {
try {
connection.disconnect();
} catch (Exception e) {
}
}
}
}
private String toString(InputStream is) throws IOException {
InputStreamReader reader = new InputStreamReader(is);
StringWriter writer = new StringWriter();
char[] buffer = new char[1024 * 4];
for (int n = reader.read(buffer); n != -1; n = reader.read(buffer)) {
writer.write(buffer, 0, n);
}
return writer.toString();
}
private void setupTruststoreIfApplicable(HttpURLConnection connection) {
if (connection instanceof HttpsURLConnection && sslFactory != null) {
HttpsURLConnection con = (HttpsURLConnection) connection;
con.setSSLSocketFactory(sslFactory);
if (hostnameVerifier != null) {
con.setHostnameVerifier(hostnameVerifier);
}
}
}
}