Created a jsp tag for helping the usage of jgravatar

README.md

@@ -11,6 +11,13 @@ jgravatar is a tiny Java library for accessing avatar images from gravatar.com
 	String url = gravatar.getUrl("[email protected]");
 	byte[] jpg = gravatar.download("[email protected]");
 
+        <%@ taglib uri="http://kindelbit.com/jgravatar" prefix="g" %>
+        <g:gravatar email="[email protected]" size="50" />
+        <g:gravatar email="[email protected]" size="200" defaultImage="mm" rating="g" />
+        <g:gravatar email="[email protected]" size="50" />
+        <g:gravatar email="[email protected]" defaultImage="mm" size="50" />
+
+
 ## License
 
 Copyright (c) 2010, Ralf Ebert

jgravatar/.classpath

@@ -3,5 +3,10 @@
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="lib" path="lib/commons-codec-1.5.jar"/>
+	<classpathentry kind="lib" path="lib/commons-fileupload-1.2.2.jar"/>
+	<classpathentry kind="lib" path="lib/commons-io-2.0.1.jar"/>
+	<classpathentry kind="lib" path="lib/commons-lang-2.6.jar"/>
+	<classpathentry kind="lib" path="lib/javax.servlet.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

jgravatar/src/META-INF/jgravatar.tld

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="iso-8859-1" ?> 
+<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" 
+" http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
+<taglib>
+	<tlibversion>1.0</tlibversion>
+	<jspversion>1.2</jspversion>
+	<shortname>Gravatar</shortname>
+	<uri>http://kindelbit.com/jgravatar</uri>
+
+	<tag>
+		<name>gravatar</name>
+		<tagclass>jgravatar.jsp.GravatarTag</tagclass>
+		<bodycontent>empty</bodycontent>
+		<info>Get an avatar from gravatar.com for the given email</info>
+		<attribute>
+			<name>email</name>
+			<required>true</required>
+			<rtexprvalue>true</rtexprvalue>
+		</attribute>
+		<attribute>
+			<name>alt</name>
+			<required>false</required>
+			<rtexprvalue>true</rtexprvalue>
+		</attribute>
+		<attribute>
+			<name>size</name>
+			<required>false</required>
+			<rtexprvalue>true</rtexprvalue>
+		</attribute>
+		<attribute>
+			<name>defaultImage</name>
+			<required>false</required>
+			<rtexprvalue>true</rtexprvalue>
+		</attribute>
+		<attribute>
+			<name>rating</name>
+			<required>false</required>
+			<rtexprvalue>true</rtexprvalue>
+		</attribute>
+	</tag>
+</taglib>

jgravatar/src/jgravatar/jsp/GravatarTag.java

@@ -0,0 +1,69 @@
+package jgravatar.jsp;
+
+import java.io.IOException;
+
+import javax.servlet.jsp.JspException;
+import javax.servlet.jsp.tagext.TagSupport;
+
+/**
+ * 
+ * @author Josemar da Costa Magalhaes
+ * @since 09/06/2011
+ */
+public class GravatarTag extends TagSupport {
+
+	private static final long serialVersionUID = 2766493961169800616L;
+	private static final String GRAVATAR_URL = "http://www.gravatar.com/avatar/";
+	private String email;
+	private String size = "80";
+	private String rating = "g";
+	private String defaultImage = "";
+	private String alt = "";
+
+	public void setEmail(Object email) {
+		this.email = (String) email;
+	}
+
+	public void setSize(Object size) {
+		this.size = (String) size;
+	}
+
+	public void setRating(Object rating) {
+		this.rating = (String) rating;
+	}
+
+	public void setDefaultImage(String defaultImage) {
+		this.defaultImage = defaultImage;
+	}
+
+	public void setAlt(Object alt) {
+		this.alt = (String) alt;
+	}
+
+	/**
+	 * create the img html tag
+	 */
+	@Override
+	public int doStartTag() throws JspException {
+		try {
+			String hash = MD5Util.md5Hex(email.toLowerCase().trim());
+			String avatar_url = GRAVATAR_URL + "" + hash;
+			StringBuilder img = new StringBuilder("<img src=\"");
+			img.append(avatar_url);
+
+			img.append("?size=" + size);
+
+			img.append("&d=" + defaultImage);
+
+			img.append("&r=" + rating + "\"");
+
+			img.append(" alt=\"" + alt + "\"");
+			img.append("/>");
+			pageContext.getOut().print(img.toString());
+		} catch (IOException e) {
+			throw new JspException(e.getMessage());
+		}
+
+		return SKIP_BODY;
+	}
+}

jgravatar/src/jgravatar/jsp/MD5Util.java

@@ -0,0 +1,24 @@
+package jgravatar.jsp;
+import java.io.UnsupportedEncodingException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+public class MD5Util {
+  public static String hex(byte[] array) {
+      StringBuffer sb = new StringBuffer();
+      for (int i = 0; i < array.length; ++i) {
+	  sb.append(Integer.toHexString((array[i]
+	      & 0xFF) | 0x100).substring(1,3));        
+      }
+      return sb.toString();
+  }
+  public static String md5Hex (String message) {
+      try {
+	  MessageDigest md = 
+	      MessageDigest.getInstance("MD5");
+	  return hex (md.digest(message.getBytes("CP1252")));
+      } catch (NoSuchAlgorithmException e) {
+      } catch (UnsupportedEncodingException e) {
+      }
+      return null;
+  }
+}