The introductory draft.

Seems to work, but no formal testing (not even on examples from RFC)
were done.

1 files changed, 242 insertions, 0 deletions

diff --git a/parseLDIF.js b/parseLDIF.js
new file mode 100644
index 0000000..286c573
--- /dev/null
+++ b/parseLDIF.js
@@ -0,0 +1,242 @@
+// Two compatibility shims
+if (!String.prototype.trim) {
+  String.prototype.trim = function () {
+      return this.replace(/^\s+|\s+$/g,'');
+    };
+}
+
+if (!String.prototype.trimRight) {
+  String.prototype.trimRight = function () {
+      return this.replace(/\s+$/,'');
+    };
+}
+
+/**
+*
+*  Base64 encode / decode
+*  http://www.webtoolkit.info/
+*  From http://stackoverflow.com/questions/246801\
+*    /how-can-you-encode-to-base64-using-javascript
+*
+**/
+var Base64 = {
+
+  // private property
+  _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
+
+  // public method for encoding
+  encode : function (input) {
+    var output = "";
+    var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
+    var i = 0;
+
+    input = Base64._utf8_encode(input);
+
+    while (i < input.length) {
+
+      chr1 = input.charCodeAt(i++);
+      chr2 = input.charCodeAt(i++);
+      chr3 = input.charCodeAt(i++);
+
+      enc1 = chr1 >> 2;
+      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
+      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
+      enc4 = chr3 & 63;
+
+      if (isNaN(chr2)) {
+        enc3 = enc4 = 64;
+      } else if (isNaN(chr3)) {
+        enc4 = 64;
+      }
+
+      output = output +
+        this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
+        this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
+
+    }
+
+    return output;
+  },
+
+  // public method for decoding
+  decode : function (input) {
+    var output = "";
+    var chr1, chr2, chr3;
+    var enc1, enc2, enc3, enc4;
+    var i = 0;
+
+    input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
+
+    while (i < input.length) {
+
+      enc1 = this._keyStr.indexOf(input.charAt(i++));
+      enc2 = this._keyStr.indexOf(input.charAt(i++));
+      enc3 = this._keyStr.indexOf(input.charAt(i++));
+      enc4 = this._keyStr.indexOf(input.charAt(i++));
+
+      chr1 = (enc1 << 2) | (enc2 >> 4);
+      chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+      chr3 = ((enc3 & 3) << 6) | enc4;
+
+      output = output + String.fromCharCode(chr1);
+
+      if (enc3 != 64) {
+        output = output + String.fromCharCode(chr2);
+      }
+      if (enc4 != 64) {
+        output = output + String.fromCharCode(chr3);
+      }
+
+    }
+
+    output = Base64._utf8_decode(output);
+
+    return output;
+
+  },
+
+  // private method for UTF-8 encoding
+  _utf8_encode : function (string) {
+    string = string.replace(/\r\n/g,"\n");
+    var utftext = "";
+
+    for (var n = 0; n < string.length; n++) {
+
+      var c = string.charCodeAt(n);
+
+      if (c < 128) {
+        utftext += String.fromCharCode(c);
+      }
+      else if((c > 127) && (c < 2048)) {
+        utftext += String.fromCharCode((c >> 6) | 192);
+        utftext += String.fromCharCode((c & 63) | 128);
+      }
+      else {
+        utftext += String.fromCharCode((c >> 12) | 224);
+        utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+        utftext += String.fromCharCode((c & 63) | 128);
+      }
+
+    }
+
+    return utftext;
+  },
+
+  // private method for UTF-8 decoding
+  _utf8_decode : function (utftext) {
+    var string = "";
+    var i = 0;
+    var c = c1 = c2 = 0;
+
+    while ( i < utftext.length ) {
+
+      c = utftext.charCodeAt(i);
+
+      if (c < 128) {
+        string += String.fromCharCode(c);
+        i++;
+      }
+      else if((c > 191) && (c < 224)) {
+        c2 = utftext.charCodeAt(i+1);
+        string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
+        i += 2;
+      }
+      else {
+        c2 = utftext.charCodeAt(i+1);
+        c3 = utftext.charCodeAt(i+2);
+        string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
+        i += 3;
+      }
+
+    }
+
+    return string;
+  }
+
+}
+
+const usefulFields = ["birthyear", "c", "cn", "description",
+    "facsimiletelephonenumber", "givenName", "homePhone", "l", "mail",
+    "mobile", "mozillaHomeCountryName", "mozillaHomeLocalityName",
+    "mozillaHomePostalCode", "mozillaHomeState", "mozillaHomeStreet",
+    "mozillaHomeUrl", "mozillaNickname", "o", "sn", "st", "street",
+    "telephoneNumber", "title"
+    ];
+
+/**
+ * parse LDIF string into JavaScript Object
+ *
+ * @inStr String
+ * @returns Object
+ *
+ * @todo
+ * Tries to follow RFC2849, but
+ *   - doesn’t even consider change requests, only complete values
+ *   - doesn’t include version: field (seems to be ignored by
+ *     Thunderbird as well).
+ *   - ignores multi-value attributes completely
+ *   - ignores < links
+ */
+function parseLDIF(inStr) {
+  var record = {}, key, value, splitLine, colon_idx,
+      out_records = [];
+
+  inStr.forEach(function (line) {
+      if (line != undefined) {
+        line = line.trim();
+
+        if (line.length === 0) {
+          if (Object.keys(record).length > 0) {
+            out_records.push(record);
+            record = {};
+          }
+        }
+        else {
+          // comment line
+          if (line[0] === "#") {
+            return ;
+          }
+          else {
+            colon_idx = line.indexOf(":");
+            line = line.trim();
+
+            // Line continuation
+            // This is how it works in THunderbird exported LDIF
+            // files, but not what RFC describes ... the first character
+            // of continuing entry should be space, and the first line
+            // of value should never be empty. Hopefully, this solution
+            // should be at least compatible for reading of RFC LDIF
+            // files (so it doesn’t hurt)
+            if (colon_idx == -1) {
+              // TODO
+              // The question is whether we shouldn't trim
+              // the result of .decode() function as well.
+              record[key] += Base64.decode(line).trim();
+              return;
+            }
+            else {
+              key = line.slice(0, colon_idx);
+              value = line.slice(colon_idx + 1);
+
+              // base64 encoded value
+              if (value[0] === ":") {
+                value = Base64.decode(value.slice(1));
+              }
+            }
+
+            if ((usefulFields.indexOf(key) != -1) &&
+                 value.length > 0) {
+              record[key] = value.trim();
+            }
+          }
+        }
+      }
+  });
+
+  return out_records;
+}
+
+if (arguments.length == 1) {
+  var lines = readFile(arguments[0]).replace(/\r\n/g,"\n");
+  print(parseLDIF(lines.split("\n")).toSource());
+}