| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. The ASF licenses this file to You |
| * 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. For additional information regarding |
| * copyright in this work, please see the NOTICE file in the top level |
| * directory of this distribution. |
| */ |
| |
| package org.apache.roller.weblogger.util; |
| |
| import java.net.HttpURLConnection; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| |
| /** |
| * Utility for deailing with mediacast files. |
| */ |
| public final class MediacastUtil { |
| |
| private static final Log LOG = LogFactory.getLog(MediacastUtil.class); |
| |
| public static final int BAD_URL = 1; |
| public static final int CHECK_FAILED = 2; |
| public static final int BAD_RESPONSE = 3; |
| public static final int INCOMPLETE = 4; |
| |
| |
| // non-instantiable |
| private MediacastUtil() {} |
| |
| |
| /** |
| * Validate a Mediacast resource. |
| */ |
| public static MediacastResource lookupResource(String url) |
| throws MediacastException { |
| |
| if(url == null || url.trim().length() ==0) { |
| return null; |
| } |
| |
| MediacastResource resource = null; |
| try { |
| HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection(); |
| con.setRequestMethod("HEAD"); |
| int response = con.getResponseCode(); |
| String message = con.getResponseMessage(); |
| |
| if(response != 200) { |
| LOG.debug("Mediacast error " + response + ":" + message + " from url " + url); |
| throw new MediacastException(BAD_RESPONSE, "weblogEdit.mediaCastResponseError"); |
| } else { |
| String contentType = con.getContentType(); |
| long length = con.getContentLength(); |
| |
| if(contentType == null || length == -1) { |
| LOG.debug("Response valid, but contentType or length is invalid"); |
| throw new MediacastException(INCOMPLETE, "weblogEdit.mediaCastLacksContentTypeOrLength"); |
| } |
| |
| resource = new MediacastResource(url, contentType, length); |
| LOG.debug("Valid mediacast resource = " + resource.toString()); |
| |
| } |
| } catch (MalformedURLException mfue) { |
| LOG.debug("Malformed MediaCast url: " + url); |
| throw new MediacastException(BAD_URL, "weblogEdit.mediaCastUrlMalformed", mfue); |
| } catch (Exception e) { |
| LOG.error("ERROR while checking MediaCast URL: " + url + ": " + e.getMessage()); |
| throw new MediacastException(CHECK_FAILED, "weblogEdit.mediaCastFailedFetchingInfo", e); |
| } |
| return resource; |
| } |
| |
| } |