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A Java library for the Twitter API
/*
* Copyright 2007 Yusuke Yamamoto
*
* 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 twitter4j;
import twitter4j.conf.ConfigurationContext;
import java.io.*;
import java.net.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @author Yusuke Yamamoto - yusuke at mac.com
* @since Twitter4J 2.1.2
*/
class HttpClientImpl extends HttpClientBase implements HttpResponseCode, java.io.Serializable {
private static final Logger logger = Logger.getLogger(HttpClientImpl.class);
static {
// disable keepAlive (Android 2.1 or earlier)
// quick and dirty workaround for TFJ-296
// @see http://stackoverflow.com/questions/1440957/
try {
// Integer.parseInt(Build.VERSION.SDK) < Build.VERSION_CODES.FROYO
if (Integer.parseInt((String) Class.forName("android.os.Build$VERSION").getField("SDK").get(null)) < 8) {
System.setProperty("http.keepAlive", "false");
}
} catch (Exception ignore) {
}
}
private static final long serialVersionUID = -403500272719330534L;
public HttpClientImpl() {
super(ConfigurationContext.getInstance().getHttpClientConfiguration());
}
public HttpClientImpl(HttpClientConfiguration conf) {
super(conf);
}
private static final Map instanceMap = new HashMap(1);
public static HttpClient getInstance(HttpClientConfiguration conf) {
HttpClient client = instanceMap.get(conf);
if (null == client) {
client = new HttpClientImpl(conf);
instanceMap.put(conf, client);
}
return client;
}
@Override
public HttpResponse get(String url) throws TwitterException {
return request(new HttpRequest(RequestMethod.GET, url, null, null, null));
}
public HttpResponse post(String url, HttpParameter[] params) throws TwitterException {
return request(new HttpRequest(RequestMethod.POST, url, params, null, null));
}
@Override
public HttpResponse handleRequest(HttpRequest req) throws TwitterException {
int retriedCount;
int retry = CONF.getHttpRetryCount() + 1;
HttpResponse res = null;
for (retriedCount = 0; retriedCount < retry; retriedCount++) {
int responseCode = -1;
try {
HttpURLConnection con;
OutputStream os = null;
try {
con = getConnection(req.getURL());
con.setDoInput(true);
setHeaders(req, con);
con.setRequestMethod(req.getMethod().name());
if (req.getMethod() == RequestMethod.POST) {
if (HttpParameter.containsFile(req.getParameters())) {
String boundary = "----Twitter4J-upload" + System.currentTimeMillis();
con.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
boundary = "--" + boundary;
con.setDoOutput(true);
os = con.getOutputStream();
DataOutputStream out = new DataOutputStream(os);
for (HttpParameter param : req.getParameters()) {
if (param.isFile()) {
write(out, boundary + "\r\n");
write(out, "Content-Disposition: form-data; name=\"" + param.getName() + "\"; filename=\"" + param.getFile().getName() + "\"\r\n");
write(out, "Content-Type: " + param.getContentType() + "\r\n\r\n");
BufferedInputStream in = new BufferedInputStream(
param.hasFileBody() ? param.getFileBody() : new FileInputStream(param.getFile())
);
byte[] buff = new byte[1024];
int length;
while ((length = in.read(buff)) != -1) {
out.write(buff, 0, length);
}
write(out, "\r\n");
in.close();
} else {
write(out, boundary + "\r\n");
write(out, "Content-Disposition: form-data; name=\"" + param.getName() + "\"\r\n");
write(out, "Content-Type: text/plain; charset=UTF-8\r\n\r\n");
logger.debug(param.getValue());
out.write(param.getValue().getBytes("UTF-8"));
write(out, "\r\n");
}
}
write(out, boundary + "--\r\n");
write(out, "\r\n");
} else {
con.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
String postParam = HttpParameter.encodeParameters(req.getParameters());
logger.debug("Post Params: ", postParam);
byte[] bytes = postParam.getBytes("UTF-8");
con.setRequestProperty("Content-Length",
Integer.toString(bytes.length));
con.setDoOutput(true);
os = con.getOutputStream();
os.write(bytes);
}
os.flush();
os.close();
}
res = new HttpResponseImpl(con, CONF);
responseCode = con.getResponseCode();
if (logger.isDebugEnabled()) {
logger.debug("Response: ");
Map> responseHeaders = con.getHeaderFields();
for (String key : responseHeaders.keySet()) {
List values = responseHeaders.get(key);
for (String value : values) {
if (key != null) {
logger.debug(key + ": " + value);
} else {
logger.debug(value);
}
}
}
}
if (responseCode < OK || (responseCode != FOUND && MULTIPLE_CHOICES <= responseCode)) {
if (responseCode == ENHANCE_YOUR_CLAIM ||
responseCode == BAD_REQUEST ||
responseCode < INTERNAL_SERVER_ERROR ||
retriedCount == CONF.getHttpRetryCount()) {
throw new TwitterException(res.asString(), res);
}
// will retry if the status code is INTERNAL_SERVER_ERROR
} else {
break;
}
} finally {
try {
os.close();
} catch (Exception ignore) {
}
}
} catch (IOException ioe) {
// connection timeout or read timeout
if (retriedCount == CONF.getHttpRetryCount()) {
throw new TwitterException(ioe.getMessage(), ioe, responseCode);
}
}
try {
if (logger.isDebugEnabled() && res != null) {
res.asString();
}
logger.debug("Sleeping " + CONF.getHttpRetryIntervalSeconds() + " seconds until the next retry.");
Thread.sleep(CONF.getHttpRetryIntervalSeconds() * 1000);
} catch (InterruptedException ignore) {
//nothing to do
}
}
return res;
}
/**
* sets HTTP headers
*
* @param req The request
* @param connection HttpURLConnection
*/
private void setHeaders(HttpRequest req, HttpURLConnection connection) {
if (logger.isDebugEnabled()) {
logger.debug("Request: ");
logger.debug(req.getMethod().name() + " ", req.getURL());
}
String authorizationHeader;
if (req.getAuthorization() != null && (authorizationHeader = req.getAuthorization().getAuthorizationHeader(req)) != null) {
if (logger.isDebugEnabled()) {
logger.debug("Authorization: ", authorizationHeader.replaceAll(".", "*"));
}
connection.addRequestProperty("Authorization", authorizationHeader);
}
if (req.getRequestHeaders() != null) {
for (String key : req.getRequestHeaders().keySet()) {
connection.addRequestProperty(key, req.getRequestHeaders().get(key));
logger.debug(key + ": " + req.getRequestHeaders().get(key));
}
}
}
HttpURLConnection getConnection(String url) throws IOException {
HttpURLConnection con;
if (isProxyConfigured()) {
if (CONF.getHttpProxyUser() != null && !CONF.getHttpProxyUser().equals("")) {
if (logger.isDebugEnabled()) {
logger.debug("Proxy AuthUser: " + CONF.getHttpProxyUser());
logger.debug("Proxy AuthPassword: " + CONF.getHttpProxyPassword().replaceAll(".", "*"));
}
Authenticator.setDefault(new Authenticator() {
@Override
protected PasswordAuthentication
getPasswordAuthentication() {
//respond only to proxy auth requests
if (getRequestorType().equals(RequestorType.PROXY)) {
return new PasswordAuthentication(CONF.getHttpProxyUser(),
CONF.getHttpProxyPassword().toCharArray());
} else {
return null;
}
}
});
}
final Proxy proxy = new Proxy(Proxy.Type.HTTP, InetSocketAddress
.createUnresolved(CONF.getHttpProxyHost(), CONF.getHttpProxyPort()));
if (logger.isDebugEnabled()) {
logger.debug("Opening proxied connection(" + CONF.getHttpProxyHost() + ":" + CONF.getHttpProxyPort() + ")");
}
con = (HttpURLConnection) new URL(url).openConnection(proxy);
} else {
con = (HttpURLConnection) new URL(url).openConnection();
}
if (CONF.getHttpConnectionTimeout() > 0) {
con.setConnectTimeout(CONF.getHttpConnectionTimeout());
}
if (CONF.getHttpReadTimeout() > 0) {
con.setReadTimeout(CONF.getHttpReadTimeout());
}
con.setInstanceFollowRedirects(false);
return con;
}
}