1 files changed, 60 insertions, 0 deletions
diff --git a/common/src/at/gv/egovernment/moa/util/URLDecoder.java b/common/src/at/gv/egovernment/moa/util/URLDecoder.java
new file mode 100644
index 000000000..a20820f7e
--- /dev/null
+++ b/common/src/at/gv/egovernment/moa/util/URLDecoder.java
@@ -0,0 +1,60 @@
+package at.gv.egovernment.moa.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.StringReader;
+import java.io.UnsupportedEncodingException;
+
+/**
+ * Decodes an URL encoded String using a specified character encoding.
+ * Provides a function missing in JDK 1.3. 
+ * @author Paul Ivancsics
+ * @version $Id$
+ */
+public class URLDecoder {
+
+  /**
+   * Decodes an <code>application/x-www-form-urlencoded</code> string using a specific encoding scheme.
+   * @param s the string to decode
+   * @param encoding name of character encoding
+   * @return the newly decoded string
+   * @throws UnsupportedEncodingException if the encoding is not supported
+   */
+  public static String decode(String s, String encoding) throws UnsupportedEncodingException {
+    StringReader in = new StringReader(s);
+    ByteArrayOutputStream bout = new ByteArrayOutputStream();
+    for (int b = read(in); b >= 0; b = read(in))
+      bout.write(b);
+    return bout.toString(encoding);
+  }
+  /**
+   * Decodes the next byte from the string reader.
+   * @param in string reader
+   * @return the next byte decoded; 
+   *          -1 upon end of string, on erroneous data, and on any exception caught
+   * @todo syntax check on string
+   */
+  private static int read(StringReader in) {
+    try { 
+      int b = in.read();
+      if (b == '+')
+        return ' ';
+      if (b == '%') {
+        char[] hex = new char[2];
+        if (in.read(hex, 0, 2) >= 0) {
+          String hexString = new String(hex);
+          return Integer.valueOf(hexString, 16).intValue();
+        }
+        else
+          return -1;
+      }
+      return b;
+    } 
+    catch (IOException ex) { 
+      return -1; 
+    }
+    catch (NumberFormatException ex) { 
+      return -1; 
+    }
+  }
+}