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89 lines
3.1 KiB
89 lines
3.1 KiB
/*
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This file is part of Libresonic.
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Libresonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Libresonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Libresonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2016 (C) Libresonic Authors
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Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
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*/
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package org.libresonic.player.filter;
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import org.libresonic.player.Logger;
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import org.libresonic.player.controller.JAXBWriter;
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import org.libresonic.player.controller.RESTController;
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import org.springframework.web.bind.ServletRequestBindingException;
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import org.springframework.web.util.NestedServletException;
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import javax.servlet.*;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import static org.libresonic.player.controller.RESTController.ErrorCode.GENERIC;
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import static org.libresonic.player.controller.RESTController.ErrorCode.MISSING_PARAMETER;
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/**
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* Intercepts exceptions thrown by RESTController.
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*
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* Also adds the CORS response header (http://enable-cors.org)
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*
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* @author Sindre Mehus
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* @version $Revision: 1.1 $ $Date: 2006/03/01 16:58:08 $
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*/
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public class RESTFilter implements Filter {
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private static final Logger LOG = Logger.getLogger(RESTFilter.class);
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private final JAXBWriter jaxbWriter = new JAXBWriter();
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public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
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try {
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HttpServletResponse response = (HttpServletResponse) res;
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response.setHeader("Access-Control-Allow-Origin", "*");
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chain.doFilter(req, res);
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} catch (Throwable x) {
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handleException(x, (HttpServletRequest) req, (HttpServletResponse) res);
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}
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}
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private void handleException(Throwable x, HttpServletRequest request, HttpServletResponse response) {
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if (x instanceof NestedServletException && x.getCause() != null) {
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x = x.getCause();
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}
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RESTController.ErrorCode code = (x instanceof ServletRequestBindingException) ? MISSING_PARAMETER : GENERIC;
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String msg = getErrorMessage(x);
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LOG.warn("Error in REST API: " + msg, x);
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try {
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jaxbWriter.writeErrorResponse(request, response, code, msg);
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} catch (Exception e) {
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LOG.error("Failed to write error response.", e);
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}
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}
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private String getErrorMessage(Throwable x) {
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if (x.getMessage() != null) {
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return x.getMessage();
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}
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return x.getClass().getSimpleName();
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}
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public void init(FilterConfig filterConfig) {
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}
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public void destroy() {
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}
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}
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