Connection.java (unquote): New method.

2005-07-13  Andrew Haley  <aph@redhat.com>

        * gnu/java/net/protocol/file/Connection.java (unquote): New
        method.
        (connect): Unquote filename.
        gnu/java/net/protocol/jar/Connection.java (getInputStream):
        Likewise.
        (getJarFile): Likewise.

        * java/net/URLConnection.java (getContentHandler): Guard cast with
        instaceof.

        * java/net/URL.java (URL): If the file part of a spec is absolute,
        ignore the file part of its context.

From-SVN: r102029

libjava/gnu/java/net/protocol/file/Connection.java

@@ -59,6 +59,7 @@ import java.security.Permission;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Locale;
+import java.net.MalformedURLException;
 
 /**
  * This subclass of java.net.URLConnection models a URLConnection via
@@ -124,6 +125,54 @@ public class Connection extends URLConnection
     permission = new FilePermission(getURL().getFile(), DEFAULT_PERMISSION);
   }
   
+  /**
+   * Unquote "%" + hex quotes characters
+   *
+   * @param str The string to unquote or null.
+   *
+   * @return The unquoted string or null if str was null.
+   *
+   * @exception MalformedURLException If the given string contains invalid
+   * escape sequences.
+   *
+   * Sadly the same as URI.unquote, but there's nothing we can do to
+   * make it accessible.
+   *
+   */
+  public static String unquote(String str) throws MalformedURLException
+  {
+    if (str == null)
+      return null;
+    byte[] buf = new byte[str.length()];
+    int pos = 0;
+    for (int i = 0; i < str.length(); i++)
+      {
+	char c = str.charAt(i);
+	if (c > 127)
+	  throw new MalformedURLException(str + " : Invalid character");
+	if (c == '%')
+	  {
+	    if (i + 2 >= str.length())
+	      throw new MalformedURLException(str + " : Invalid quoted character");
+	    int hi = Character.digit(str.charAt(++i), 16);
+	    int lo = Character.digit(str.charAt(++i), 16);
+	    if (lo < 0 || hi < 0)
+	      throw new MalformedURLException(str + " : Invalid quoted character");
+	    buf[pos++] = (byte) (hi * 16 + lo);
+	  }
+	else
+	  buf[pos++] = (byte) c;
+      }
+    try
+      {
+	return new String(buf, 0, pos, "utf-8");
+      }
+    catch (java.io.UnsupportedEncodingException x2)
+      {
+	throw (Error) new InternalError().initCause(x2);
+      }
+  }
+
   /**
    * "Connects" to the file by opening it.
    */
@@ -134,7 +183,7 @@ public class Connection extends URLConnection
       return;
     
     // If not connected, then file needs to be openned.
-    file = new File (getURL().getFile());
+    file = new File (unquote(getURL().getFile()));
 
     if (! file.isDirectory())
       {