dlr 01/05/14 19:17:41
Modified: src/java/org/apache/turbine/util ServletUtils.java
Log:
A bunch of useful constants and the functionality for extracting the
host part of a URL as a buffer for use in URL generation.
Revision Changes Path
1.9 +64 -1
jakarta-turbine/src/java/org/apache/turbine/util/ServletUtils.java
Index: ServletUtils.java
===================================================================
RCS file:
/home/cvs/jakarta-turbine/src/java/org/apache/turbine/util/ServletUtils.java,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9
--- ServletUtils.java 2001/05/05 03:19:18 1.8
+++ ServletUtils.java 2001/05/15 02:17:39 1.9
@@ -57,17 +57,40 @@
import java.util.StringTokenizer;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
+import javax.servlet.http.HttpServletRequest;
+
import org.apache.turbine.Turbine;
/**
* This is where common Servlet manipulation routines should go.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Gonzalo Diethelm</a>
- * @version $Id: ServletUtils.java,v 1.8 2001/05/05 03:19:18 jvanzyl Exp $
+ * @version $Id: ServletUtils.java,v 1.9 2001/05/15 02:17:39 dlr Exp $
*/
public class ServletUtils
{
/**
+ * The default HTTP port number.
+ */
+ public static final int HTTP_PORT = 80;
+
+ /**
+ * The default HTTPS port number.
+ */
+ public static final int HTTPS_PORT = 443;
+
+ /**
+ * The default FTP port number.
+ */
+ public static final int FTP_PORT = 20;
+
+ /**
+ * The part of the URI which separates the protocal indicator (i.e. the
+ * scheme) from the rest of the URI.
+ */
+ public static final String URI_SCHEME_SEPARATOR = "://";
+
+ /**
* Expands a string that points to a relative path or path list,
* leaving it as an absolute path based on the servlet context.
* It will return null if the text is empty or the config object
@@ -124,5 +147,45 @@
}
}
return buffer.toString();
+ }
+
+ /**
+ * Defaults to the scheme used in the supplied request.
+ *
+ * @see #hostURL(HttpServletRequest req, String proto)
+ */
+ public static StringBuffer hostURL(HttpServletRequest req)
+ {
+ return hostURL(req, null);
+ }
+
+ /**
+ * Returns a URL fragment derived from the provided HTTP request,
+ * including the protocol used to address the server (if non-standard
+ * for HTTP/HTTPS). Returns the fragment as a buffer
+ *
+ * @param req The request to extract information from.
+ * @param scheme The protocal indicator to prefix the host name with, or
+ * the protocal used to address the server with if <code>null</code>.
+ * @return The desired URL fragment.
+ */
+ public static StringBuffer hostURL(HttpServletRequest req, String scheme)
+ {
+ if (scheme == null)
+ {
+ scheme = req.getScheme();
+ }
+ StringBuffer url = new StringBuffer()
+ .append(scheme)
+ .append(URI_SCHEME_SEPARATOR)
+ .append(req.getServerName());
+ int port = req.getServerPort();
+ if (! (("http".equalsIgnoreCase(scheme) && port == HTTP_PORT) ||
+ ("https".equalsIgnoreCase(scheme) && port == HTTPS_PORT) ||
+ ("ftp".equalsIgnoreCase(scheme) && port == FTP_PORT)) )
+ {
+ url.append(':').append(port);
+ }
+ return url;
}
}
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