diff options
Diffstat (limited to 'utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencer.java')
-rw-r--r-- | utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencer.java | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencer.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencer.java new file mode 100644 index 00000000..7361ec26 --- /dev/null +++ b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencer.java @@ -0,0 +1,108 @@ +/* +* Copyright 2008 Federal Chancellery Austria and +* Graz University of Technology +* +* 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 at.gv.egiz.bku.utils.urldereferencer;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.util.HashMap;
+import java.util.Map;
+ +import javax.net.ssl.HostnameVerifier; +import javax.net.ssl.SSLSocketFactory; +
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * Class used to dereference (external URLs).
+ *
+ * @author wbauer
+ *
+ */
+public class URLDereferencer {
+
+ private static Log log = LogFactory.getLog(URLDereferencer.class);
+
+ private static URLDereferencer instance = new URLDereferencer();
+
+ private Map<String, URLProtocolHandler> handlerMap = new HashMap<String, URLProtocolHandler>();
+ + private HostnameVerifier hostnameVerifier; + private SSLSocketFactory sslSocketFactory; +
+ private URLDereferencer() {
+ registerHandlers();
+ }
+
+ /**
+ *
+ * @param aUrl
+ * must not be null
+ * @param aContext
+ * @throws MalformedURLException
+ * if the protocol is not supported + * @throws IOException if the url cannot be dereferenced (e.g. formdata not provided) + *
+ */
+ public StreamData dereference(String aUrl, URLDereferencerContext aContext)
+ throws IOException {
+ log.debug("Looking for handler for URL: " + aUrl);
+ int i = aUrl.indexOf(":");
+ if (i == -1) {
+ throw new MalformedURLException("Invalid url: " + aUrl);
+ }
+ String protocol = aUrl.substring(0, i).toLowerCase().trim();
+ URLProtocolHandler handler = handlerMap.get(protocol);
+ if (handler == null) {
+ throw new MalformedURLException("No handler for protocol: " + protocol
+ + " found");
+ } + handler.setHostnameVerifier(hostnameVerifier); + handler.setSSLSocketFactory(sslSocketFactory);
+ return handler.dereference(aUrl, aContext);
+ }
+
+ /**
+ * Registers a handler for a protocol.
+ *
+ * @param aProtocol
+ * @param aHandler
+ * may be set to null to disable this protocol
+ */
+ public void registerHandler(String aProtocol, URLProtocolHandler aHandler) {
+ handlerMap.put(aProtocol.toLowerCase(), aHandler);
+ }
+
+ public static URLDereferencer getInstance() {
+ return instance;
+ }
+
+ protected void registerHandlers() {
+ URLProtocolHandler handler = new HTTPURLProtocolHandlerImpl();
+ for (String proto : HTTPURLProtocolHandlerImpl.PROTOCOLS) {
+ handlerMap.put(proto, handler);
+ }
+ } + + public void setHostnameVerifier(HostnameVerifier hostnameVerifier) { + this.hostnameVerifier = hostnameVerifier; + } + + public void setSSLSocketFactory(SSLSocketFactory socketFactory) { + this.sslSocketFactory = socketFactory; + }
+}
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