/**
 * Yobi, Project Hosting SW
 *
 * Copyright 2013 NAVER Corp.
 * http://yobi.io
 *
 * @author Suwon Chae
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package utils;

import org.apache.commons.lang3.StringUtils;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class GravatarUtil {

    public static final String DEFAULT_GRAVATAR_URL = "http://ko.gravatar.com/userimage/53495145/0eaeeb47c620542ad089f17377298af6.png";
    public static final int DEFAULT_SIZE = 80;

    public static String getAvatar(String email) {
        return getAvatar(email, DEFAULT_SIZE);
    }

    public static String getAvatar(String email, int size) {
        return getAvatar(email, size, DEFAULT_GRAVATAR_URL);
    }

    public static String getAvatar(String email, int size, String defaultImageUrl) {
        try {
            String url = "http://www.gravatar.com/avatar/" + MD5Util.md5Hex(email) + "?s=" + size;
            if(StringUtils.isNotEmpty(defaultImageUrl)) {
                url += "&d=" + URLEncoder.encode(defaultImageUrl, "UTF-8");
            }
            return url;
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

}

/**
 * Yobi, Project Hosting SW
 *
 * Copyright 2013 NAVER Corp.
 * http://yobi.io
 *
 * @author Suwon Chae
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package utils;

import org.apache.commons.lang3.StringUtils;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class GravatarUtil {

    public static final String DEFAULT_GRAVATAR_URL = "https://ko.gravatar.com/userimage/53495145/0eaeeb47c620542ad089f17377298af6.png";
    public static final int DEFAULT_SIZE = 80;

    public static String getAvatar(String email) {
        return getAvatar(email, DEFAULT_SIZE);
    }

    public static String getAvatar(String email, int size) {
        return getAvatar(email, size, DEFAULT_GRAVATAR_URL);
    }

    public static String getAvatar(String email, int size, String defaultImageUrl) {
        try {
            String url = "https://www.gravatar.com/avatar/" + MD5Util.md5Hex(email) + "?s=" + size;
            if(StringUtils.isNotEmpty(defaultImageUrl)) {
                url += "&d=" + URLEncoder.encode(defaultImageUrl, "UTF-8");
            }
            return url;
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

}

Fix Mixed-Contents warnings