| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. 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. |
| */ |
| |
| package org.apache.jena.util; |
| |
| import java.io.BufferedInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.util.Locale ; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** Location files named by a URL |
| * @deprecated Use {@code StreamManager} and {@code LocatorHTTP} from {@code org.apache.jena.riot.system.stream}. |
| */ |
| @Deprecated |
| public class LocatorURL implements Locator |
| { |
| static Logger log = LoggerFactory.getLogger(LocatorURL.class) ; |
| static final String acceptHeader = "application/rdf+xml,application/xml;q=0.9,*/*;q=0.5" ; |
| |
| static final String[] schemeNames = { "http:" , "https:" } ; // Must be lower case and include the ":" |
| |
| @Override |
| public TypedStream open(String filenameOrURI) |
| { |
| if ( ! acceptByScheme(filenameOrURI) ) |
| { |
| if ( FileManager.logAllLookups && log.isTraceEnabled() ) |
| log.trace("Not found : "+filenameOrURI) ; |
| return null; |
| } |
| |
| try |
| { |
| URL url = new URL(filenameOrURI); |
| URLConnection conn = url.openConnection(); |
| conn.setRequestProperty("Accept", acceptHeader) ; |
| conn.setRequestProperty("Accept-Charset", "utf-8,*") ; |
| conn.setDoInput(true) ; |
| conn.setDoOutput(false) ; |
| // Default is true. See javadoc for HttpURLConnection |
| //((HttpURLConnection)conn).setInstanceFollowRedirects(true) ; |
| conn.connect() ; |
| InputStream in = new BufferedInputStream(conn.getInputStream()); |
| |
| if ( FileManager.logAllLookups && log.isTraceEnabled() ) |
| log.trace("Found: "+filenameOrURI) ; |
| return new TypedStream(in, conn.getContentType()) ; |
| } |
| catch (java.io.FileNotFoundException ex) |
| { |
| if ( FileManager.logAllLookups && log.isTraceEnabled() ) |
| log.trace("LocatorURL: not found: "+filenameOrURI) ; |
| return null ; |
| } |
| catch (MalformedURLException ex) |
| { |
| log.warn("Malformed URL: " + filenameOrURI); |
| return null; |
| } |
| // IOExceptions that occur sometimes. |
| catch (java.net.UnknownHostException ex) |
| { |
| if ( FileManager.logAllLookups && log.isTraceEnabled() ) |
| log.trace("LocatorURL: not found (UnknownHostException): "+filenameOrURI) ; |
| return null ; |
| } |
| catch (java.net.ConnectException ex) |
| { |
| if ( FileManager.logAllLookups && log.isTraceEnabled() ) |
| log.trace("LocatorURL: not found (ConnectException): "+filenameOrURI) ; |
| return null ; |
| } |
| catch (java.net.SocketException ex) |
| { |
| if ( FileManager.logAllLookups && log.isTraceEnabled() ) |
| log.trace("LocatorURL: not found (SocketException): "+filenameOrURI) ; |
| return null ; |
| } |
| // And IOExceptions we don't expect |
| catch (IOException ex) |
| { |
| log.warn("I/O Exception opening URL: " + filenameOrURI+" "+ex.getMessage(), ex); |
| return null; |
| } |
| } |
| |
| @Override |
| public boolean equals( Object other ) |
| { |
| return other instanceof LocatorURL; |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return LocatorURL.class.hashCode(); |
| } |
| |
| @Override |
| public String getName() { return "LocatorURL" ; } |
| |
| private boolean acceptByScheme(String filenameOrURI) |
| { |
| String uriSchemeName = getScheme(filenameOrURI) ; |
| if ( uriSchemeName == null ) |
| return false ; |
| uriSchemeName = uriSchemeName.toLowerCase(Locale.ENGLISH) ; |
| for ( String schemeName : schemeNames ) |
| { |
| if ( uriSchemeName.equals( schemeName ) ) |
| { |
| return true; |
| } |
| } |
| return false ; |
| } |
| |
| private boolean hasScheme(String uri, String scheme) |
| { |
| String actualScheme = getScheme(uri) ; |
| if ( actualScheme == null ) |
| return false ; |
| return actualScheme.equalsIgnoreCase(scheme) ; |
| } |
| |
| // Not perfect - but we support Java 1.3 (as of August 2004) |
| private String getScheme(String uri) |
| { |
| int ch = uri.indexOf(':') ; |
| if ( ch < 0 ) |
| return null ; |
| |
| // Includes the : |
| return uri.substring(0,ch+1) ; |
| } |
| |
| } |