org.argeo.enterprise/src/org/argeo/naming/LdifParser.java

   1 package org.argeo.naming;
   2
   3 import java.io.BufferedReader;
   4 import java.io.IOException;
   5 import java.io.InputStream;
   6 import java.io.InputStreamReader;
   7 import java.util.ArrayList;
   8 import java.util.Base64;
   9 import java.util.List;
  10 import java.util.SortedMap;
  11 import java.util.TreeMap;
  12
  13 import javax.naming.InvalidNameException;
  14 import javax.naming.NamingException;
  15 import javax.naming.directory.Attribute;
  16 import javax.naming.directory.Attributes;
  17 import javax.naming.directory.BasicAttribute;
  18 import javax.naming.directory.BasicAttributes;
  19 import javax.naming.ldap.LdapName;
  20 import javax.naming.ldap.Rdn;
  21
  22 import org.apache.commons.logging.Log;
  23 import org.apache.commons.logging.LogFactory;
  24 import org.argeo.osgi.useradmin.UserDirectoryException;
  25
  26 /** Basic LDIF parser. */
  27 public class LdifParser {
  28         private final static Log log = LogFactory.getLog(LdifParser.class);
  29
  30         protected Attributes addAttributes(SortedMap<LdapName, Attributes> res, int lineNumber, LdapName currentDn,
  31                         Attributes currentAttributes) {
  32                 try {
  33                         Rdn nameRdn = currentDn.getRdn(currentDn.size() - 1);
  34                         Attribute nameAttr = currentAttributes.get(nameRdn.getType());
  35                         if (nameAttr == null)
  36                                 currentAttributes.put(nameRdn.getType(), nameRdn.getValue());
  37                         else if (!nameAttr.get().equals(nameRdn.getValue()))
  38                                 throw new UserDirectoryException(
  39                                                 "Attribute " + nameAttr.getID() + "=" + nameAttr.get() + " not consistent with DN " + currentDn
  40                                                                 + " (shortly before line " + lineNumber + " in LDIF file)");
  41                         Attributes previous = res.put(currentDn, currentAttributes);
  42                         if (log.isTraceEnabled())
  43                                 log.trace("Added " + currentDn);
  44                         return previous;
  45                 } catch (NamingException e) {
  46                         throw new UserDirectoryException("Cannot add " + currentDn, e);
  47                 }
  48         }
  49
  50         public SortedMap<LdapName, Attributes> read(InputStream in) throws IOException {
  51                 SortedMap<LdapName, Attributes> res = new TreeMap<LdapName, Attributes>();
  52                 try {
  53                         List<String> lines = new ArrayList<>();
  54                         try (BufferedReader br = new BufferedReader(new InputStreamReader(in))) {
  55                                 String line;
  56                                 while ((line = br.readLine()) != null) {
  57                                         lines.add(line);
  58                                 }
  59                         }
  60                         if (lines.size() == 0)
  61                                 return res;
  62                         // add an empty new line since the last line is not checked
  63                         if (!lines.get(lines.size() - 1).equals(""))
  64                                 lines.add("");
  65
  66                         LdapName currentDn = null;
  67                         Attributes currentAttributes = null;
  68                         StringBuilder currentEntry = new StringBuilder();
  69
  70                         readLines: for (int lineNumber = 0; lineNumber < lines.size(); lineNumber++) {
  71                                 String line = lines.get(lineNumber);
  72                                 boolean isLastLine = false;
  73                                 if (lineNumber == lines.size() - 1)
  74                                         isLastLine = true;
  75                                 if (line.startsWith(" ")) {
  76                                         currentEntry.append(line.substring(1));
  77                                         if (!isLastLine)
  78                                                 continue readLines;
  79                                 }
  80
  81                                 if (currentEntry.length() != 0 || isLastLine) {
  82                                         // read previous attribute
  83                                         StringBuilder attrId = new StringBuilder(8);
  84                                         boolean isBase64 = false;
  85                                         readAttrId: for (int i = 0; i < currentEntry.length(); i++) {
  86                                                 char c = currentEntry.charAt(i);
  87                                                 if (c == ':') {
  88                                                         if (i + 1 < currentEntry.length() && currentEntry.charAt(i + 1) == ':')
  89                                                                 isBase64 = true;
  90                                                         currentEntry.delete(0, i + (isBase64 ? 2 : 1));
  91                                                         break readAttrId;
  92                                                 } else {
  93                                                         attrId.append(c);
  94                                                 }
  95                                         }
  96
  97                                         String attributeId = attrId.toString();
  98                                         String cleanValueStr = currentEntry.toString().trim();
  99                                         Object attributeValue = isBase64 ? Base64.getDecoder().decode(cleanValueStr) : cleanValueStr;
 100
 101                                         // manage DN attributes
 102                                         if (attributeId.equals(LdapAttrs.DN) || isLastLine) {
 103                                                 if (currentDn != null) {
 104                                                         //
 105                                                         // ADD
 106                                                         //
 107                                                         Attributes previous = addAttributes(res, lineNumber, currentDn, currentAttributes);
 108                                                         if (previous != null) {
 109                                                                 log.warn("There was already an entry with DN " + currentDn
 110                                                                                 + ", which has been discarded by a subsequent one.");
 111                                                         }
 112                                                 }
 113
 114                                                 if (attributeId.equals(LdapAttrs.DN))
 115                                                         try {
 116                                                                 currentDn = new LdapName(attributeValue.toString());
 117                                                                 currentAttributes = new BasicAttributes(true);
 118                                                         } catch (InvalidNameException e) {
 119                                                                 log.error(attributeValue + " not a valid DN, skipping the entry.");
 120                                                                 currentDn = null;
 121                                                                 currentAttributes = null;
 122                                                         }
 123                                         }
 124
 125                                         // store attribute
 126                                         if (currentAttributes != null) {
 127                                                 Attribute attribute = currentAttributes.get(attributeId);
 128                                                 if (attribute == null) {
 129                                                         attribute = new BasicAttribute(attributeId);
 130                                                         currentAttributes.put(attribute);
 131                                                 }
 132                                                 attribute.add(attributeValue);
 133                                         }
 134                                         currentEntry = new StringBuilder();
 135                                 }
 136                                 currentEntry.append(line);
 137                         }
 138                 } finally {
 139                         in.close();
 140                 }
 141                 return res;
 142         }
 143 }