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/*
* Copyright 2008 Netflix, 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 net.oauth.client;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import net.oauth.http.HttpClient;
import net.oauth.http.HttpMessage;
import net.oauth.http.HttpResponseMessage;
/**
* An HttpClient based on HttpURLConnection.
* <p>
* HttpClient3 or HttpClient4 perform better than this class, as a rule; since
* they do things like connection pooling. They also support reading the body
* of an HTTP response whose status code isn't 200 (OK), which can enable your
* application to handle problems better.
*
* @author John Kristian
* @hide
*/
public class URLConnectionClient implements HttpClient {
/** Send a message to the service provider and get the response. */
public HttpResponseMessage execute(HttpMessage request) throws IOException {
final String httpMethod = request.method;
final Collection<Map.Entry<String, String>> addHeaders = request.headers;
final URL url = request.url;
final URLConnection connection = url.openConnection();
connection.setDoInput(true);
if (connection instanceof HttpURLConnection) {
HttpURLConnection http = (HttpURLConnection) connection;
http.setRequestMethod(httpMethod);
http.setInstanceFollowRedirects(false);
}
StringBuilder headers = new StringBuilder(httpMethod);
{
headers.append(" ").append(url.getPath());
String query = url.getQuery();
if (query != null && query.length() > 0) {
headers.append("?").append(query);
}
headers.append(EOL);
for (Map.Entry<String, List<String>> header : connection
.getRequestProperties().entrySet()) {
String key = header.getKey();
for (String value : header.getValue()) {
headers.append(key).append(": ").append(value).append(EOL);
}
}
}
String contentLength = null;
for (Map.Entry<String, String> header : addHeaders) {
String key = header.getKey();
if (HttpMessage.CONTENT_LENGTH.equalsIgnoreCase(key)
&& connection instanceof HttpURLConnection) {
contentLength = header.getValue();
} else {
connection.setRequestProperty(key, header.getValue());
}
headers.append(key).append(": ").append(header.getValue()).append(EOL);
}
byte[] excerpt = null;
final InputStream body = request.getBody();
if (body != null) {
try {
if (contentLength != null) {
((HttpURLConnection) connection)
.setFixedLengthStreamingMode(Integer.parseInt(contentLength));
}
connection.setDoOutput(true);
OutputStream output = connection.getOutputStream();
try {
final ExcerptInputStream ex = new ExcerptInputStream(body);
byte[] b = new byte[1024];
for (int n; 0 < (n = ex.read(b));) {
output.write(b, 0, n);
}
excerpt = ex.getExcerpt();
} finally {
output.close();
}
} finally {
body.close();
}
}
return new URLConnectionResponse(request, headers.toString(), excerpt, connection);
}
private static final String EOL = HttpResponseMessage.EOL;
}
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