Java tutorial
/* * Copyright 2011-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. * A copy of the License is located at * * http://aws.amazon.com/apache2.0 * * or in the "license" file accompanying this file. This file 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.sinacloud.scs.http; import java.io.IOException; import java.net.InetSocketAddress; import java.net.Socket; import java.net.UnknownHostException; import java.security.NoSuchAlgorithmException; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocket; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; import org.apache.http.Header; import org.apache.http.HttpHost; import org.apache.http.HttpRequest; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.ProtocolException; import org.apache.http.auth.AuthScope; import org.apache.http.auth.NTCredentials; import org.apache.http.client.HttpClient; import org.apache.http.conn.ConnectTimeoutException; import org.apache.http.conn.params.ConnRoutePNames; import org.apache.http.conn.scheme.PlainSocketFactory; import org.apache.http.conn.scheme.Scheme; import org.apache.http.conn.scheme.SchemeLayeredSocketFactory; import org.apache.http.conn.scheme.SchemeRegistry; import org.apache.http.conn.scheme.SchemeSocketFactory; import org.apache.http.conn.ssl.SSLSocketFactory; import org.apache.http.impl.client.DefaultRedirectStrategy; import org.apache.http.impl.conn.PoolingClientConnectionManager; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams; import org.apache.http.protocol.HttpContext; import com.sinacloud.scs.ClientConfiguration; import com.sinacloud.scs.SCSClientException; import com.sinacloud.scs.http.impl.client.SdkHttpClient; import com.sinacloud.scs.http.impl.client.SdkHttpRequestRetryHandler; /** Responsible for creating and configuring instances of Apache HttpClient4. */ class HttpClientFactory { /** * Creates a new HttpClient object using the specified AWS * ClientConfiguration to configure the client. * * @param config * Client configuration options (ex: proxy settings, connection * limits, etc). * * @return The new, configured HttpClient. */ @SuppressWarnings("deprecation") public HttpClient createHttpClient(ClientConfiguration config) { /* Set HTTP client parameters */ HttpParams httpClientParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpClientParams, config.getConnectionTimeout()); HttpConnectionParams.setSoTimeout(httpClientParams, config.getSocketTimeout()); HttpConnectionParams.setStaleCheckingEnabled(httpClientParams, true); HttpConnectionParams.setTcpNoDelay(httpClientParams, true); int socketSendBufferSizeHint = config.getSocketBufferSizeHints()[0]; int socketReceiveBufferSizeHint = config.getSocketBufferSizeHints()[1]; if (socketSendBufferSizeHint > 0 || socketReceiveBufferSizeHint > 0) { HttpConnectionParams.setSocketBufferSize(httpClientParams, Math.max(socketSendBufferSizeHint, socketReceiveBufferSizeHint)); } PoolingClientConnectionManager connectionManager = ConnectionManagerFactory .createPoolingClientConnManager(config, httpClientParams); SdkHttpClient httpClient = new SdkHttpClient(connectionManager, httpClientParams); if (config.getMaxErrorRetry() > 0) httpClient.setHttpRequestRetryHandler(SdkHttpRequestRetryHandler.Singleton); // httpClient.setRedirectStrategy(new LocationHeaderNotRequiredRedirectStrategy()); try { Scheme http = new Scheme("http", PlainSocketFactory.getSocketFactory(), 80); SSLSocketFactory sf = new SSLSocketFactory(SSLContext.getDefault(), SSLSocketFactory.STRICT_HOSTNAME_VERIFIER); Scheme https = new Scheme("https", sf, 443); SchemeRegistry sr = connectionManager.getSchemeRegistry(); sr.register(http); sr.register(https); } catch (NoSuchAlgorithmException e) { throw new SCSClientException("Unable to access default SSL context", e); } // /* // * If SSL cert checking for endpoints has been explicitly disabled, // * register a new scheme for HTTPS that won't cause self-signed certs to // * error out. // */ // if (System.getProperty(DISABLE_CERT_CHECKING_SYSTEM_PROPERTY) != null) { Scheme sch = new Scheme("https", 443, new TrustingSocketFactory()); httpClient.getConnectionManager().getSchemeRegistry().register(sch); // } /* Set proxy if configured */ String proxyHost = config.getProxyHost(); int proxyPort = config.getProxyPort(); if (proxyHost != null && proxyPort > 0) { // AmazonHttpClient.log.info("Configuring Proxy. Proxy Host: " + proxyHost + " " + "Proxy Port: " + proxyPort); HttpHost proxyHttpHost = new HttpHost(proxyHost, proxyPort); httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxyHttpHost); String proxyUsername = config.getProxyUsername(); String proxyPassword = config.getProxyPassword(); String proxyDomain = config.getProxyDomain(); String proxyWorkstation = config.getProxyWorkstation(); if (proxyUsername != null && proxyPassword != null) { httpClient.getCredentialsProvider().setCredentials(new AuthScope(proxyHost, proxyPort), new NTCredentials(proxyUsername, proxyPassword, proxyWorkstation, proxyDomain)); } } return httpClient; } /** * Customization of the default redirect strategy provided by HttpClient to be a little * less strict about the Location header to account for S3 not sending the Location * header with 301 responses. */ private static final class LocationHeaderNotRequiredRedirectStrategy extends DefaultRedirectStrategy { @Override public boolean isRedirected(HttpRequest request, HttpResponse response, HttpContext context) throws ProtocolException { int statusCode = response.getStatusLine().getStatusCode(); Header locationHeader = response.getFirstHeader("location"); // Instead of throwing a ProtocolException in this case, just // return false to indicate that this is not redirected if (locationHeader == null && statusCode == HttpStatus.SC_MOVED_PERMANENTLY) return false; return super.isRedirected(request, response, context); } } /** * Simple implementation of SchemeSocketFactory (and * LayeredSchemeSocketFactory) that bypasses SSL certificate checks. This * class is only intended to be used for testing purposes. */ private static class TrustingSocketFactory implements SchemeSocketFactory, SchemeLayeredSocketFactory { private SSLContext sslcontext = null; private static SSLContext createSSLContext() throws IOException { try { SSLContext context = SSLContext.getInstance("TLS"); context.init(null, new TrustManager[] { new TrustingX509TrustManager() }, null); return context; } catch (Exception e) { throw new IOException(e.getMessage(), e); } } private SSLContext getSSLContext() throws IOException { if (this.sslcontext == null) this.sslcontext = createSSLContext(); return this.sslcontext; } public Socket createSocket(HttpParams params) throws IOException { return getSSLContext().getSocketFactory().createSocket(); } public Socket connectSocket(Socket sock, InetSocketAddress remoteAddress, InetSocketAddress localAddress, HttpParams params) throws IOException, UnknownHostException, ConnectTimeoutException { int connTimeout = HttpConnectionParams.getConnectionTimeout(params); int soTimeout = HttpConnectionParams.getSoTimeout(params); SSLSocket sslsock = (SSLSocket) ((sock != null) ? sock : createSocket(params)); if (localAddress != null) sslsock.bind(localAddress); sslsock.connect(remoteAddress, connTimeout); sslsock.setSoTimeout(soTimeout); return sslsock; } public boolean isSecure(Socket sock) throws IllegalArgumentException { return true; } public Socket createLayeredSocket(Socket arg0, String arg1, int arg2, HttpParams arg3) throws IOException, UnknownHostException { return getSSLContext().getSocketFactory().createSocket(arg0, arg1, arg2, true); } } /** * Simple implementation of X509TrustManager that trusts all certificates. * This class is only intended to be used for testing purposes. */ private static class TrustingX509TrustManager implements X509TrustManager { private static final X509Certificate[] X509_CERTIFICATES = new X509Certificate[0]; public X509Certificate[] getAcceptedIssuers() { return X509_CERTIFICATES; } public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException { // No-op, to trust all certs } public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException { // No-op, to trust all certs } }; }