10 files changed, 288 insertions, 304 deletions
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/FormDataURLSupplier.java b/utils/src/main/java/at/gv/egiz/bku/utils/ClasspathURLStreamHandler.java
index 7272f1bb..1cd46fb5 100644
--- a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/FormDataURLSupplier.java
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/ClasspathURLStreamHandler.java
@@ -1,5 +1,5 @@
 /*
-* Copyright 2008 Federal Chancellery Austria and
+* Copyright 2009 Federal Chancellery Austria and
 * Graz University of Technology
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,13 +14,21 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-package at.gv.egiz.bku.utils.urldereferencer;
-
-import java.io.InputStream;
-
-public interface FormDataURLSupplier {
-  public static final String PROPERTY_KEY_NAME = "at.gv.egiz.bku.util.urldereferencer.FormDataURLSupplier";
-
-  public InputStream getFormData(String aParameterName);
-  public String getFormDataContentType(String aParameterName);
-}
-\ No newline at end of file
+
+package at.gv.egiz.bku.utils;
+
+import java.io.IOException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+
+public class ClasspathURLStreamHandler extends URLStreamHandler {
+
+  @Override
+  protected URLConnection openConnection(URL u) throws IOException {
+    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+    URL resource = classLoader.getResource(u.getPath());
+    return resource.openConnection();
+  }
+
+}
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/DebugInputStream.java b/utils/src/main/java/at/gv/egiz/bku/utils/DebugInputStream.java
new file mode 100644
index 00000000..b65baf5b
--- /dev/null
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/DebugInputStream.java
@@ -0,0 +1,59 @@
+/*
+* Copyright 2009 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;
+
+import java.io.ByteArrayOutputStream;
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class DebugInputStream extends FilterInputStream {
+
+  private ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+  
+  public DebugInputStream(InputStream in) {
+    super(in);
+  }
+
+  /* (non-Javadoc)
+   * @see java.io.FilterInputStream#read()
+   */
+  @Override
+  public int read() throws IOException {
+    int b = super.read();
+    buffer.write(b);
+    return b;
+  }
+
+  /* (non-Javadoc)
+   * @see java.io.FilterInputStream#read(byte[], int, int)
+   */
+  @Override
+  public int read(byte[] b, int off, int len) throws IOException {
+    int l = super.read(b, off, len);
+    if (l > 0) {
+      buffer.write(b, off, l);
+    }
+    return l;
+  }
+
+  public byte[] getBufferedBytes() {
+    return buffer.toByteArray();
+  }
+
+}
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/binding/Protocol.java b/utils/src/main/java/at/gv/egiz/bku/utils/binding/Protocol.java
index f0504697..574d17a9 100644
--- a/utils/src/main/java/at/gv/egiz/bku/utils/binding/Protocol.java
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/binding/Protocol.java
@@ -17,7 +17,7 @@
 package at.gv.egiz.bku.utils.binding;
 
 public enum Protocol {
-  HTTP("http"), HTTPS("https");
+  HTTP("http"), HTTPS("https"), SAML("saml");
   
   private String name;
   
@@ -35,6 +35,9 @@ public enum Protocol {
     }
     if (HTTPS.toString().equalsIgnoreCase(protocol)) {
       return HTTPS;
+    }
+    if (SAML.toString().equalsIgnoreCase(protocol)) {
+      return SAML;
     }
     return null;
   }
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/HTTPURLProtocolHandlerImpl.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/HTTPURLProtocolHandlerImpl.java
index dfe7d5e6..51288a9f 100644
--- a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/HTTPURLProtocolHandlerImpl.java
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/HTTPURLProtocolHandlerImpl.java
@@ -17,7 +17,6 @@
 package at.gv.egiz.bku.utils.urldereferencer;
 
 import java.io.IOException;
-import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.security.InvalidParameterException;
@@ -26,86 +25,55 @@ import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.HttpsURLConnection;
 import javax.net.ssl.SSLSocketFactory;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class HTTPURLProtocolHandlerImpl implements URLProtocolHandler {
 
-  private static Log log = LogFactory.getLog(HTTPURLProtocolHandlerImpl.class);
+  private final Logger log = LoggerFactory.getLogger(HTTPURLProtocolHandlerImpl.class);
 
   public final static String HTTP = "http";
   public final static String HTTPS = "https";
-  public final static String FORMDATA = "formdata";
-  public final static String[] PROTOCOLS = { HTTP, HTTPS, FORMDATA };
+
+  public final static String[] PROTOCOLS = { HTTP, HTTPS };
 
   private HostnameVerifier hostnameVerifier;
   private SSLSocketFactory sslSocketFactory;
 
-  public StreamData dereference(String aUrl, URLDereferencerContext aContext)
+  public StreamData dereference(String url)
       throws IOException {
-    String urlString = aUrl.toLowerCase().trim();
-    if (urlString.startsWith(FORMDATA)) {
-      log.debug("Requested to dereference a formdata url");
-      return dereferenceFormData(aUrl, aContext);
-    }
-
-    URL url = new URL(aUrl);
-    if ((!HTTP.equalsIgnoreCase(url.getProtocol()) && (!HTTPS
-        .equalsIgnoreCase(url.getProtocol())))) {
-      throw new InvalidParameterException("Url " + aUrl + " not supported");
+    URL u = new URL(url);
+    if ((!HTTP.equalsIgnoreCase(u.getProtocol()) && (!HTTPS
+        .equalsIgnoreCase(u.getProtocol())))) {
+      throw new InvalidParameterException("Url " + url + " not supported");
     }
-    return dereferenceHTTP(url);
+    return dereferenceHTTP(u);
   }
 
   protected StreamData dereferenceHTTP(URL url) throws IOException {
-    log.debug("Dereferencing url: " + url);
+    log.info("Dereferencing URL: '{}'.", url);
     HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
     if (httpConn instanceof HttpsURLConnection) {
-      log.trace("Detected ssl connection");
+      log.trace("Detected ssl connection.");
       HttpsURLConnection https = (HttpsURLConnection) httpConn;
       if (sslSocketFactory != null) {
-        log.debug("Setting custom ssl socket factory for ssl connection");
+        log.debug("Setting custom ssl socket factory for ssl connection.");
         https.setSSLSocketFactory(sslSocketFactory);
       } else {
-        log.trace("No custom socket factory set");
+        log.trace("No custom socket factory set.");
       }
       if (hostnameVerifier != null) {
-        log.debug("Setting custom hostname verifier");
+        log.debug("Setting custom hostname verifier.");
         https.setHostnameVerifier(hostnameVerifier);
       }
     } else {
-      log.trace("No secure connection with: "+url+ " class="+httpConn.getClass());
+      log.trace("No secure connection with: {} class={}.", url, httpConn.getClass());
     }
-    log.trace("Successfully opened connection");
+    log.trace("Successfully opened connection.");
     return new StreamData(url.toString(), httpConn.getContentType(), httpConn
         .getInputStream());
   }
 
-  /**
-   * 
-   * @param aUrl
-   * @param aContext
-   * @return
-   * @throws IOException if the data cannot be found or reading the stream failed.
-   */
-  protected StreamData dereferenceFormData(String aUrl,
-      URLDereferencerContext aContext) throws IOException {
-    log.debug("Dereferencing formdata url: " + aUrl);
-    String[] parts = aUrl.split(":", 2);
-    FormDataURLSupplier supplier = (FormDataURLSupplier) aContext
-        .getProperty(FormDataURLSupplier.PROPERTY_KEY_NAME);
-    if (supplier == null) {
-      throw new NullPointerException(
-          "No FormdataUrlSupplier found in provided context");
-    }
-    String contentType = supplier.getFormDataContentType(parts[1]);
-    InputStream is = supplier.getFormData(parts[1]);
-    if (is != null) {
-      return new StreamData(aUrl, contentType, is);
-    }
-     throw new IOException("Cannot dereference url: formdata not found");
-  }
-
   @Override
   public void setHostnameVerifier(HostnameVerifier hostnameVerifier) {
     this.hostnameVerifier = hostnameVerifier;
@@ -116,4 +84,4 @@ public class HTTPURLProtocolHandlerImpl implements URLProtocolHandler {
     this.sslSocketFactory = socketFactory;
   }
 
-}
-\ No newline at end of file
+}
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/SimpleFormDataContextImpl.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/SimpleFormDataContextImpl.java
deleted file mode 100644
index e9da9c81..00000000
--- a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/SimpleFormDataContextImpl.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
-* 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;
-
-public class SimpleFormDataContextImpl implements URLDereferencerContext {
-  protected FormDataURLSupplier formdata;
-  
-  /**
-   * 
-   * @param formdata must not be null
-   */
-  public SimpleFormDataContextImpl(FormDataURLSupplier formdata) {
-    if (formdata == null) {
-      throw new NullPointerException("FormdataURLSupplier must not be null");
-    }
-    this.formdata = formdata;
-  }
-
-  @Override
-  public Object getProperty(Object key) {
-    if (key.equals(FormDataURLSupplier.PROPERTY_KEY_NAME)) {
-      return formdata;
-    }   
-    return null;
-  }
-
-}
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URIResolverAdapter.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URIResolverAdapter.java
index 2d11010e..0dccbe8f 100644
--- a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URIResolverAdapter.java
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URIResolverAdapter.java
@@ -14,83 +14,73 @@
 * 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.URI;
-import java.net.URISyntaxException;
-
-import javax.xml.transform.Source;
-import javax.xml.transform.TransformerException;
-import javax.xml.transform.URIResolver;
-import javax.xml.transform.stream.StreamSource;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
-/**
- * Adapter to make the Urldereferencer work as URIResolver for
- * Stylesheettransforms.
- * 
- * @author wbauer
- * 
- */
-public class URIResolverAdapter implements URIResolver {
-  
-  private static Log log = LogFactory.getLog(URIResolverAdapter.class);
-
-  private URLDereferencer urlDereferencer;
-  private URLDereferencerContext ctx;
-
-  /**
-   * 
-   * @param deferecencer
-   *          must not be null
-   * @param ctx may be null
-   */
-  public URIResolverAdapter(URLDereferencer deferecencer,
-      URLDereferencerContext ctx) {
-    if (deferecencer == null) {
-      throw new NullPointerException("Urlderefencer must not be set to null");
-    }
-    this.urlDereferencer = deferecencer;
-    this.ctx = ctx;
-  }
-
-  @Override
-  public Source resolve(String href, String base) throws TransformerException {
-    log.debug("Resolving href: "+href+" base: "+base);
-    try {
-      URI baseUri = null;
-      URI hrefUri = new URI(href);
-      if (base != null) {
-        baseUri = new URI(base);
-      }
-      URI abs;
-      if (baseUri != null) {
-        abs = baseUri.resolve(hrefUri);
-      } else {
-        abs = hrefUri;
-      }
-      if (!abs.isAbsolute()) {
-        throw new TransformerException("Only absolute URLs are supported");
-      }
-      return new StreamSource(urlDereferencer.dereference(abs.toString(), ctx)
-          .getStream());
-    } catch (URISyntaxException e) {
-      throw new TransformerException("Cannot resolve URI: base:" + base
-          + " href:" + href, e);
-    } catch (IOException iox) {
-      throw new TransformerException("Cannot resolve URI: base:" + base
-          + " href:" + href, iox);
-    }
-  }
-
-  public URLDereferencerContext getCtx() {
-    return ctx;
-  }
-
-  public void setCtx(URLDereferencerContext ctx) {
-    this.ctx = ctx;
-  }
-}
+package at.gv.egiz.bku.utils.urldereferencer;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import javax.xml.transform.Source;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.URIResolver;
+import javax.xml.transform.stream.StreamSource;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Adapter to make the Urldereferencer work as URIResolver for
+ * Stylesheettransforms.
+ * 
+ * @author wbauer
+ * 
+ */
+public class URIResolverAdapter implements URIResolver {
+  
+  private final Logger log = LoggerFactory.getLogger(URIResolverAdapter.class);
+
+  private URLDereferencer urlDereferencer;
+
+  /**
+   * 
+   * @param deferecencer
+   *          must not be null
+   * @param ctx may be null
+   */
+  public URIResolverAdapter(URLDereferencer deferecencer) {
+    if (deferecencer == null) {
+      throw new NullPointerException("Urlderefencer must not be set to null");
+    }
+    this.urlDereferencer = deferecencer;
+  }
+
+  @Override
+  public Source resolve(String href, String base) throws TransformerException {
+    log.debug("Resolving href: {} base: {}", href, base);
+    try {
+      URI baseUri = null;
+      URI hrefUri = new URI(href);
+      if (base != null) {
+        baseUri = new URI(base);
+      }
+      URI abs;
+      if (baseUri != null) {
+        abs = baseUri.resolve(hrefUri);
+      } else {
+        abs = hrefUri;
+      }
+      if (!abs.isAbsolute()) {
+        throw new TransformerException("Only absolute URLs are supported");
+      }
+      return new StreamSource(urlDereferencer.dereference(abs.toString())
+          .getStream());
+    } catch (URISyntaxException e) {
+      throw new TransformerException("Cannot resolve URI: base:" + base
+          + " href:" + href, e);
+    } catch (IOException iox) {
+      throw new TransformerException("Cannot resolve URI: base:" + base
+          + " href:" + href, iox);
+    }
+  }
+
+}
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
index 7361ec26..468610e4 100644
--- 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
@@ -1,5 +1,5 @@
 /*
-* Copyright 2008 Federal Chancellery Austria and
+* Copyright 2009 Federal Chancellery Austria and
 * Graz University of Technology
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,95 +14,13 @@
 * 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>();
+package at.gv.egiz.bku.utils.urldereferencer;
 
-  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);
-    }
-  }
+import java.io.IOException;
+
+public interface URLDereferencer {
   
-  public void setHostnameVerifier(HostnameVerifier hostnameVerifier) {
-    this.hostnameVerifier = hostnameVerifier;
-  }
+  public StreamData dereference(String aUrl) throws IOException;
 
-  public void setSSLSocketFactory(SSLSocketFactory socketFactory) {
-    this.sslSocketFactory = socketFactory;
-  }
-}
-\ No newline at end of file
+}
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencerContext.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencerContext.java
deleted file mode 100644
index 6befd5b3..00000000
--- a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencerContext.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
-* 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;
-
-public interface URLDereferencerContext {
-
-  /**
-   * 
-   * @param key
-   * @return may return null
-   */
-  public Object getProperty(Object key);
-}
-\ No newline at end of file
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencerImpl.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencerImpl.java
new file mode 100644
index 00000000..d1a68c46
--- /dev/null
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLDereferencerImpl.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.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class used to dereference (external URLs).
+ * 
+ * @author wbauer
+ * 
+ */
+public class URLDereferencerImpl implements URLDereferencer {
+
+  private final Logger log = LoggerFactory.getLogger(URLDereferencerImpl.class);
+
+  private static URLDereferencerImpl instance = new URLDereferencerImpl();
+
+  private Map<String, URLProtocolHandler> handlerMap = new HashMap<String, URLProtocolHandler>();
+
+  private HostnameVerifier hostnameVerifier;
+  private SSLSocketFactory sslSocketFactory;
+  
+  private URLDereferencerImpl() {
+    registerHandlers();
+  }
+
+  /**
+   * 
+   * @param aUrl
+   *          must not be null
+   * @throws MalformedURLException
+   *           if the protocol is not supported
+   * @throws IOException if the url cannot be dereferenced (e.g. formdata not provided)
+   *           
+   */
+  @Override
+  public StreamData dereference(String aUrl)
+      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);
+  }
+
+  /**
+   * 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 URLDereferencerImpl 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;
+  }
+}
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLProtocolHandler.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLProtocolHandler.java
index f886bd4e..1da1ad71 100644
--- a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLProtocolHandler.java
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URLProtocolHandler.java
@@ -17,7 +17,6 @@
 package at.gv.egiz.bku.utils.urldereferencer;
 
 import java.io.IOException;
-import java.net.MalformedURLException;
 
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLSocketFactory;
@@ -26,12 +25,11 @@ import javax.net.ssl.SSLSocketFactory;
 public interface URLProtocolHandler {
   /**
    * 
-   * @param aUrl
-   * @param aContext
+   * @param url
    * @return the streamdata of this url or null if the url cannot be resolved.
    * @throws IOException
    */
-  public StreamData dereference(String aUrl, URLDereferencerContext aContext) throws IOException;
+  public StreamData dereference(String url) throws IOException;
   
   public void setSSLSocketFactory(SSLSocketFactory socketFactory);