com.google.web.bindery.requestfactory.vm.testing.UrlRequestTransport Maven / Gradle / Ivy
/*
* Copyright 2011 Google 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.google.web.bindery.requestfactory.vm.testing;
import com.google.web.bindery.requestfactory.shared.RequestFactory;
import com.google.web.bindery.requestfactory.shared.RequestTransport;
import com.google.web.bindery.requestfactory.shared.ServerFailure;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpCookie;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.GZIPInputStream;
import java.util.zip.InflaterInputStream;
/**
* A trivial implementation of RequestTransport that uses a
* {@link HttpURLConnection}. Details of the connection can be amended by
* overriding {@link #configureConnection(HttpURLConnection)}.
*
* This implementation only supports {@code http} and {@code https} URLs. It has
* primitive support for recording and playing back cookies, but does not
* implement expiration processing.
*
* Developers who wish to build a more production-ready client should consider
* using a RequestTRansport based around Apache HttpClient instead.
*/
public class UrlRequestTransport implements RequestTransport {
private static final int CONNECT_TIMEOUT = 30000;
private static final int READ_TIMEOUT = 60000;
private final Map cookies = new HashMap();
private final URL url;
/**
* Construct a new UrlRequestTransport.
*
* @param url the URL to connect to
* @throws IllegalArgumentException if the url's protocol is not {@code http}
* or {@code https}
*/
public UrlRequestTransport(URL url) {
this.url = url;
String proto = url.getProtocol().toLowerCase();
if (!proto.equals("http") && !proto.equals("https")) {
throw new IllegalArgumentException("Only http and https URLs supported");
}
}
/**
* Provides access to the cookies that will be sent for subsequent requests.
*/
public Map getCookies() {
return cookies;
}
@Override
public void send(String payload, TransportReceiver receiver) {
HttpURLConnection connection = null;
try {
connection = (HttpURLConnection) url.openConnection();
configureConnection(connection);
OutputStream out = connection.getOutputStream();
out.write(payload.getBytes("UTF-8"));
out.close();
int status = connection.getResponseCode();
if (status != HttpURLConnection.HTTP_OK) {
ServerFailure failure = new ServerFailure(status + " " + connection.getResponseMessage());
receiver.onTransportFailure(failure);
return;
}
List cookieHeaders = connection.getHeaderFields().get("Set-Cookie");
if (cookieHeaders != null) {
for (String header : cookieHeaders) {
List headerCookies;
try {
headerCookies = HttpCookie.parse(header);
} catch (IllegalArgumentException e) {
// if we can't parse it, ignore it
continue;
}
for (HttpCookie cookie : headerCookies) {
String domain = cookie.getDomain();
if (domain == null || url.getHost().endsWith(domain)) {
String path = cookie.getPath();
if (path == null || url.getPath().startsWith(path)) {
cookies.put(cookie.getName(), cookie.getValue());
}
}
}
}
}
String encoding = connection.getContentEncoding();
InputStream in = connection.getInputStream();
if ("gzip".equalsIgnoreCase(encoding)) {
in = new GZIPInputStream(in);
} else if ("deflate".equalsIgnoreCase(encoding)) {
in = new InflaterInputStream(in);
} else if (encoding != null) {
receiver.onTransportFailure(new ServerFailure("Unknown server encoding " + encoding));
return;
}
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int read = in.read(buffer);
while (read != -1) {
bytes.write(buffer, 0, read);
read = in.read(buffer);
}
in.close();
String received = new String(bytes.toByteArray(), "UTF-8");
receiver.onTransportSuccess(received);
} catch (IOException e) {
ServerFailure failure = new ServerFailure(e.getMessage(), e.getClass().getName(), null, true);
receiver.onTransportFailure(failure);
} finally {
if (connection != null) {
connection.disconnect();
}
}
}
protected void configureConnection(HttpURLConnection connection) throws IOException {
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setUseCaches(false);
connection.setRequestProperty("Accept-Encoding", "gzip, deflate");
connection.setRequestProperty("Content-Type", RequestFactory.JSON_CONTENT_TYPE_UTF8);
connection.setRequestProperty("Host", url.getHost());
connection.setRequestProperty("User-Agent", UrlRequestTransport.class.getCanonicalName());
connection.setConnectTimeout(CONNECT_TIMEOUT);
connection.setReadTimeout(READ_TIMEOUT);
if (!cookies.isEmpty()) {
StringBuilder sb = new StringBuilder();
boolean needsSemi = false;
for (Map.Entry entry : cookies.entrySet()) {
if (needsSemi) {
sb.append("; ");
} else {
needsSemi = true;
}
sb.append(entry.getKey()).append("=").append(entry.getValue());
}
connection.setRequestProperty("Cookie", sb.toString());
}
}
}