DavexFsProvider.java

   1 package org.argeo.jackrabbit.fs;
   2
   3 import java.io.IOException;
   4 import java.net.URI;
   5 import java.net.URISyntaxException;
   6 import java.nio.file.DirectoryStream;
   7 import java.nio.file.FileSystem;
   8 import java.nio.file.FileSystemAlreadyExistsException;
   9 import java.nio.file.Files;
  10 import java.nio.file.Path;
  11 import java.util.HashMap;
  12 import java.util.Map;
  13
  14 import javax.jcr.Repository;
  15 import javax.jcr.RepositoryFactory;
  16 import javax.jcr.Session;
  17
  18 import org.apache.jackrabbit.core.security.authentication.LocalAuthContext;
  19 import org.argeo.jackrabbit.client.ClientDavexRepositoryFactory;
  20 import org.argeo.jcr.ArgeoJcrException;
  21 import org.argeo.jcr.fs.JcrFileSystem;
  22 import org.argeo.jcr.fs.JcrFsException;
  23
  24 /**
  25  * A file system provider based on a JCR repository remotely accessed via the
  26  * DAVEX protocol.
  27  */
  28 public class DavexFsProvider extends AbstractJackrabbitFsProvider {
  29 //      final static String JACKRABBIT_REPOSITORY_URI = "org.apache.jackrabbit.repository.uri";
  30 //      final static String JACKRABBIT_REMOTE_DEFAULT_WORKSPACE = "org.apache.jackrabbit.spi2davex.WorkspaceNameDefault";
  31
  32         private Map<String, JcrFileSystem> fileSystems = new HashMap<>();
  33
  34         @Override
  35         public String getScheme() {
  36                 return "davex";
  37         }
  38
  39         @Override
  40         public FileSystem newFileSystem(URI uri, Map<String, ?> env) throws IOException {
  41                 if (uri.getHost() == null)
  42                         throw new ArgeoJcrException("An host should be provided");
  43                 try {
  44                         URI repoUri = new URI("http", uri.getUserInfo(), uri.getHost(), uri.getPort(), uri.getPath(), null, null);
  45                         String repoKey = repoUri.toString();
  46                         if (fileSystems.containsKey(repoKey))
  47                                 throw new FileSystemAlreadyExistsException("CMS file system already exists for " + repoKey);
  48                         RepositoryFactory repositoryFactory = new ClientDavexRepositoryFactory();
  49                         return tryGetRepo(repositoryFactory, repoUri, "home");
  50                 } catch (Exception e) {
  51                         throw new ArgeoJcrException("Cannot open file system " + uri, e);
  52                 }
  53         }
  54
  55         private JcrFileSystem tryGetRepo(RepositoryFactory repositoryFactory, URI repoUri, String workspace)
  56                         throws IOException {
  57                 Map<String, String> params = new HashMap<String, String>();
  58                 params.put(ClientDavexRepositoryFactory.JACKRABBIT_DAVEX_URI, repoUri.toString());
  59                 params.put(ClientDavexRepositoryFactory.JACKRABBIT_REMOTE_DEFAULT_WORKSPACE, "main");
  60                 Repository repository = null;
  61                 Session session = null;
  62                 try {
  63                         repository = repositoryFactory.getRepository(params);
  64                         if (repository != null)
  65                                 session = repository.login(workspace);
  66                 } catch (Exception e) {
  67                         // silent
  68                 }
  69
  70                 if (session == null) {
  71                         if (repoUri.getPath() == null || repoUri.getPath().equals("/"))
  72                                 return null;
  73                         String repoUriStr = repoUri.toString();
  74                         if (repoUriStr.endsWith("/"))
  75                                 repoUriStr = repoUriStr.substring(0, repoUriStr.length() - 1);
  76                         String nextRepoUriStr = repoUriStr.substring(0, repoUriStr.lastIndexOf('/'));
  77                         String nextWorkspace = repoUriStr.substring(repoUriStr.lastIndexOf('/') + 1);
  78                         URI nextUri;
  79                         try {
  80                                 nextUri = new URI(nextRepoUriStr);
  81                         } catch (URISyntaxException e) {
  82                                 throw new ArgeoJcrException("Badly formatted URI", e);
  83                         }
  84                         return tryGetRepo(repositoryFactory, nextUri, nextWorkspace);
  85                 } else {
  86                         JcrFileSystem fileSystem = new JcrFileSystem(this, repository);
  87                         fileSystems.put(repoUri.toString() + "/" + workspace, fileSystem);
  88                         return fileSystem;
  89                 }
  90         }
  91
  92         @Override
  93         public FileSystem getFileSystem(URI uri) {
  94                 return currentUserFileSystem(uri);
  95         }
  96
  97         @Override
  98         public Path getPath(URI uri) {
  99                 JcrFileSystem fileSystem = currentUserFileSystem(uri);
 100                 if (fileSystem == null)
 101                         try {
 102                                 fileSystem = (JcrFileSystem) newFileSystem(uri, new HashMap<String, Object>());
 103                         } catch (IOException e) {
 104                                 throw new JcrFsException("Could not autocreate file system", e);
 105                         }
 106                 URI repoUri = null;
 107                 try {
 108                         repoUri = new URI("http", uri.getUserInfo(), uri.getHost(), uri.getPort(), uri.getPath(), null, null);
 109                 } catch (URISyntaxException e) {
 110                         throw new IllegalArgumentException(e);
 111                 }
 112                 String uriStr = repoUri.toString();
 113                 String localPath = null;
 114                 for (String key : fileSystems.keySet()) {
 115                         if (uriStr.startsWith(key)) {
 116                                 localPath = uriStr.toString().substring(key.length());
 117                         }
 118                 }
 119                 if ("".equals(localPath))
 120                         localPath = "/";
 121                 return fileSystem.getPath(localPath);
 122         }
 123
 124         private JcrFileSystem currentUserFileSystem(URI uri) {
 125                 for (String key : fileSystems.keySet()) {
 126                         if (uri.toString().startsWith(key))
 127                                 return fileSystems.get(key);
 128                 }
 129                 return null;
 130         }
 131
 132         public static void main(String args[]) {
 133                 try {
 134                         DavexFsProvider fsProvider = new DavexFsProvider();
 135                         Path path = fsProvider.getPath(new URI("davex://root:demo@localhost:7070/jcr/ego/"));
 136                         System.out.println(path);
 137                         DirectoryStream<Path> ds = Files.newDirectoryStream(path);
 138                         for (Path p : ds) {
 139                                 System.out.println("- " + p);
 140                         }
 141                 } catch (Exception e) {
 142                         e.printStackTrace();
 143                 }
 144         }
 145 }