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diff --git a/server/runtime/org.argeo.server.jcr/src/main/java/org/argeo/jcr/proxy/AbstractUrlProxy.java b/server/runtime/org.argeo.server.jcr/src/main/java/org/argeo/jcr/proxy/AbstractUrlProxy.java
new file mode 100644
index 000000000..7bec5ee7a
--- /dev/null
+++ b/server/runtime/org.argeo.server.jcr/src/main/java/org/argeo/jcr/proxy/AbstractUrlProxy.java
@@ -0,0 +1,133 @@
+package org.argeo.jcr.proxy;
+
+import java.io.InputStream;
+import java.net.URL;
+
+import javax.jcr.Binary;
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.Repository;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.nodetype.NodeType;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.ArgeoException;
+import org.argeo.jcr.JcrUtils;
+
+/** Base class for URL based proxys. */
+public abstract class AbstractUrlProxy implements ResourceProxy {
+	private final static Log log = LogFactory.getLog(AbstractUrlProxy.class);
+
+	private Repository jcrRepository;
+	private Session jcrAdminSession;
+
+	protected abstract String retrieve(String relativePath);
+
+	void init() {
+		try {
+			jcrAdminSession = jcrRepository.login();
+			beforeInitSessionSave();
+			if (jcrAdminSession.hasPendingChanges())
+				jcrAdminSession.save();
+		} catch (RepositoryException e) {
+			JcrUtils.discardQuietly(jcrAdminSession);
+			throw new ArgeoException("Cannot initialize Maven proxy", e);
+		}
+	}
+
+	/**
+	 * Called before the (admin) session is saved at the end of the
+	 * initialization. Does nothing by default, to be overridden.
+	 */
+	protected void beforeInitSessionSave() throws RepositoryException {
+	}
+
+	void destroy() {
+		JcrUtils.logoutQuietly(jcrAdminSession);
+	}
+
+	/**
+	 * Called before the (admin) session is logged out when resources are
+	 * released. Does nothing by default, to be overridden.
+	 */
+	protected void beforeDestroySessionLogout() throws RepositoryException {
+	}
+
+	public Node proxy(Session jcrSession, String path) {
+		Node node;
+		try {
+			String nodePath = getNodePath(path);
+			if (!jcrSession.itemExists(nodePath)) {
+				String nodeIdentifier = retrieve(path);
+				if (nodeIdentifier == null) {
+					// log.warn("Could not proxy " + path);
+					return null;
+				} else {
+					node = jcrSession.getNodeByIdentifier(nodeIdentifier);
+				}
+			} else {
+				node = jcrSession.getNode(nodePath);
+			}
+		} catch (RepositoryException e) {
+			throw new ArgeoException("Cannot proxy " + path, e);
+		}
+		return node;
+	}
+
+	protected Node proxyUrl(String baseUrl, String path) {
+		Node node = null;
+		String remoteUrl = baseUrl + path;
+		if (log.isTraceEnabled())
+			log.trace("baseUrl=" + remoteUrl);
+		InputStream in = null;
+		try {
+			URL u = new URL(remoteUrl);
+			in = u.openStream();
+			node = importFile(getNodePath(path), in);
+			if (log.isDebugEnabled())
+				log.debug("Imported " + remoteUrl + " to " + node);
+		} catch (Exception e) {
+			if (log.isTraceEnabled())
+				log.trace("Cannot read " + remoteUrl + ", skipping... "
+						+ e.getMessage());
+			if (log.isTraceEnabled()) {
+				log.trace("Cannot read because of ", e);
+			}
+		} finally {
+			IOUtils.closeQuietly(in);
+		}
+
+		return node;
+	}
+
+	protected synchronized Node importFile(String nodePath, InputStream in) {
+		// FIXME allow parallel proxying
+		Binary binary = null;
+		try {
+			Node node = JcrUtils.mkdirs(jcrAdminSession, nodePath,
+					NodeType.NT_FILE, NodeType.NT_FOLDER, false);
+			Node content = node.addNode(Node.JCR_CONTENT, NodeType.NT_RESOURCE);
+			binary = jcrAdminSession.getValueFactory().createBinary(in);
+			content.setProperty(Property.JCR_DATA, binary);
+			jcrAdminSession.save();
+			return node;
+		} catch (RepositoryException e) {
+			JcrUtils.discardQuietly(jcrAdminSession);
+			throw new ArgeoException("Cannot initialize Maven proxy", e);
+		} finally {
+			JcrUtils.closeQuietly(binary);
+		}
+	}
+
+	protected Session getJcrAdminSession() {
+		return jcrAdminSession;
+	}
+
+	public void setJcrRepository(Repository jcrRepository) {
+		this.jcrRepository = jcrRepository;
+	}
+
+}