Java tutorial
/* * Copyright (C) 2013 Christian Halstrick <christian.halstrick@sap.com> * and other copyright owners as documented in the project's IP log. * * This program and the accompanying materials are made available * under the terms of the Eclipse Distribution License v1.0 which * accompanies this distribution, is reproduced below, and is * available at http://www.eclipse.org/org/documents/edl-v10.php * * All rights reserved. * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * - Neither the name of the Eclipse Foundation, Inc. nor the * names of its contributors may be used to endorse or promote * products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.eclipse.jgit.transport.http.apache; import static org.eclipse.jgit.util.HttpSupport.METHOD_GET; import static org.eclipse.jgit.util.HttpSupport.METHOD_HEAD; import static org.eclipse.jgit.util.HttpSupport.METHOD_POST; import static org.eclipse.jgit.util.HttpSupport.METHOD_PUT; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.InetSocketAddress; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.Proxy; import java.net.URL; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; import java.security.cert.X509Certificate; import java.util.HashMap; import java.util.LinkedList; import java.util.List; import java.util.Map; import javax.net.ssl.HostnameVerifier; import javax.net.ssl.KeyManager; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLException; import javax.net.ssl.SSLSession; import javax.net.ssl.SSLSocket; import javax.net.ssl.TrustManager; import org.apache.http.Header; import org.apache.http.HeaderElement; import org.apache.http.HttpEntity; import org.apache.http.HttpEntityEnclosingRequest; import org.apache.http.HttpHost; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.config.RequestConfig; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpHead; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpPut; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.config.Registry; import org.apache.http.config.RegistryBuilder; import org.apache.http.conn.socket.ConnectionSocketFactory; import org.apache.http.conn.socket.PlainConnectionSocketFactory; import org.apache.http.conn.ssl.SSLConnectionSocketFactory; import org.apache.http.conn.ssl.X509HostnameVerifier; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.conn.BasicHttpClientConnectionManager; import org.eclipse.jgit.transport.http.HttpConnection; import org.eclipse.jgit.transport.http.apache.internal.HttpApacheText; import org.eclipse.jgit.util.TemporaryBuffer; import org.eclipse.jgit.util.TemporaryBuffer.LocalFile; /** * A {@link HttpConnection} which uses {@link HttpClient} * * @since 3.3 */ public class HttpClientConnection implements HttpConnection { HttpClient client; URL url; HttpUriRequest req; HttpResponse resp = null; String method = "GET"; //$NON-NLS-1$ private TemporaryBufferEntity entity; private boolean isUsingProxy = false; private Proxy proxy; private Integer timeout = null; private Integer readTimeout; private Boolean followRedirects; private X509HostnameVerifier hostnameverifier; SSLContext ctx; private HttpClient getClient() { if (client == null) { HttpClientBuilder clientBuilder = HttpClients.custom(); RequestConfig.Builder configBuilder = RequestConfig.custom(); if (proxy != null && !Proxy.NO_PROXY.equals(proxy)) { isUsingProxy = true; InetSocketAddress adr = (InetSocketAddress) proxy.address(); clientBuilder.setProxy(new HttpHost(adr.getHostName(), adr.getPort())); } if (timeout != null) { configBuilder.setConnectTimeout(timeout.intValue()); } if (readTimeout != null) { configBuilder.setSocketTimeout(readTimeout.intValue()); } if (followRedirects != null) { configBuilder.setRedirectsEnabled(followRedirects.booleanValue()); } if (hostnameverifier != null) { SSLConnectionSocketFactory sslConnectionFactory = new SSLConnectionSocketFactory(getSSLContext(), hostnameverifier); clientBuilder.setSSLSocketFactory(sslConnectionFactory); Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create() .register("https", sslConnectionFactory) .register("http", PlainConnectionSocketFactory.INSTANCE).build(); clientBuilder.setConnectionManager(new BasicHttpClientConnectionManager(registry)); } clientBuilder.setDefaultRequestConfig(configBuilder.build()); client = clientBuilder.build(); } return client; } private SSLContext getSSLContext() { if (ctx == null) { try { ctx = SSLContext.getInstance("TLS"); //$NON-NLS-1$ } catch (NoSuchAlgorithmException e) { throw new IllegalStateException(HttpApacheText.get().unexpectedSSLContextException, e); } } return ctx; } /** * Sets the buffer from which to take the request body * * @param buffer */ public void setBuffer(TemporaryBuffer buffer) { this.entity = new TemporaryBufferEntity(buffer); } /** * @param urlStr * @throws MalformedURLException */ public HttpClientConnection(String urlStr) throws MalformedURLException { this(urlStr, null); } /** * @param urlStr * @param proxy * @throws MalformedURLException */ public HttpClientConnection(String urlStr, Proxy proxy) throws MalformedURLException { this(urlStr, proxy, null); } /** * @param urlStr * @param proxy * @param cl * @throws MalformedURLException */ public HttpClientConnection(String urlStr, Proxy proxy, HttpClient cl) throws MalformedURLException { this.client = cl; this.url = new URL(urlStr); this.proxy = proxy; } public int getResponseCode() throws IOException { execute(); return resp.getStatusLine().getStatusCode(); } public URL getURL() { return url; } public String getResponseMessage() throws IOException { execute(); return resp.getStatusLine().getReasonPhrase(); } private void execute() throws IOException, ClientProtocolException { if (resp != null) { return; } if (entity == null) { resp = getClient().execute(req); return; } try { if (req instanceof HttpEntityEnclosingRequest) { HttpEntityEnclosingRequest eReq = (HttpEntityEnclosingRequest) req; eReq.setEntity(entity); } resp = getClient().execute(req); } finally { entity.close(); entity = null; } } public Map<String, List<String>> getHeaderFields() { Map<String, List<String>> ret = new HashMap<String, List<String>>(); for (Header hdr : resp.getAllHeaders()) { List<String> list = new LinkedList<String>(); for (HeaderElement hdrElem : hdr.getElements()) list.add(hdrElem.toString()); ret.put(hdr.getName(), list); } return ret; } public void setRequestProperty(String name, String value) { req.addHeader(name, value); } public void setRequestMethod(String method) throws ProtocolException { this.method = method; if (METHOD_GET.equalsIgnoreCase(method)) { req = new HttpGet(url.toString()); } else if (METHOD_HEAD.equalsIgnoreCase(method)) { req = new HttpHead(url.toString()); } else if (METHOD_PUT.equalsIgnoreCase(method)) { req = new HttpPut(url.toString()); } else if (METHOD_POST.equalsIgnoreCase(method)) { req = new HttpPost(url.toString()); } else { this.method = null; throw new UnsupportedOperationException(); } } public void setUseCaches(boolean usecaches) { // not needed } public void setConnectTimeout(int timeout) { this.timeout = Integer.valueOf(timeout); } public void setReadTimeout(int readTimeout) { this.readTimeout = Integer.valueOf(readTimeout); } public String getContentType() { HttpEntity responseEntity = resp.getEntity(); if (responseEntity != null) { Header contentType = responseEntity.getContentType(); if (contentType != null) return contentType.getValue(); } return null; } public InputStream getInputStream() throws IOException { return resp.getEntity().getContent(); } // will return only the first field public String getHeaderField(String name) { Header header = resp.getFirstHeader(name); return (header == null) ? null : header.getValue(); } public int getContentLength() { Header contentLength = resp.getFirstHeader("content-length"); //$NON-NLS-1$ if (contentLength == null) { return -1; } try { int l = Integer.parseInt(contentLength.getValue()); return l < 0 ? -1 : l; } catch (NumberFormatException e) { return -1; } } public void setInstanceFollowRedirects(boolean followRedirects) { this.followRedirects = Boolean.valueOf(followRedirects); } public void setDoOutput(boolean dooutput) { // TODO: check whether we can really ignore this. } public void setFixedLengthStreamingMode(int contentLength) { if (entity != null) throw new IllegalArgumentException(); entity = new TemporaryBufferEntity(new LocalFile(null)); entity.setContentLength(contentLength); } public OutputStream getOutputStream() throws IOException { if (entity == null) entity = new TemporaryBufferEntity(new LocalFile(null)); return entity.getBuffer(); } public void setChunkedStreamingMode(int chunklen) { if (entity == null) entity = new TemporaryBufferEntity(new LocalFile(null)); entity.setChunked(true); } public String getRequestMethod() { return method; } public boolean usingProxy() { return isUsingProxy; } public void connect() throws IOException { execute(); } public void setHostnameVerifier(final HostnameVerifier hostnameverifier) { this.hostnameverifier = new X509HostnameVerifier() { public boolean verify(String hostname, SSLSession session) { return hostnameverifier.verify(hostname, session); } public void verify(String host, String[] cns, String[] subjectAlts) throws SSLException { throw new UnsupportedOperationException(); // TODO message } public void verify(String host, X509Certificate cert) throws SSLException { throw new UnsupportedOperationException(); // TODO message } public void verify(String host, SSLSocket ssl) throws IOException { hostnameverifier.verify(host, ssl.getSession()); } }; } public void configure(KeyManager[] km, TrustManager[] tm, SecureRandom random) throws KeyManagementException { getSSLContext().init(km, tm, random); } }