Source Code Cross Referenced for Generator.java in  » Web-Framework » jpublish » uk » ltd » getahead » dwrdemo » asmg » Java Source Code / Java DocumentationJava Source Code and Java Documentation

01:        /*
02:         *
03:         * Copyright 2005 Joe Walker
04:         *
05:         * Licensed under the Apache License, Version 2.0 (the "License");
06:         * you may not use this file except in compliance with the License.
07:         * You may obtain a copy of the License at
08:         *
09:         *     http://www.apache.org/licenses/LICENSE-2.0
10:         *
11:         * Unless required by applicable law or agreed to in writing, software
12:         * distributed under the License is distributed on an "AS IS" BASIS,
13:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14:         * See the License for the specific language governing permissions and
15:         * limitations under the License.
16:         *
17:         */
18:        package uk.ltd.getahead.dwrdemo.asmg;
19:
20:        import java.util.StringTokenizer;
21:
22:        import org.directwebremoting.Security;
23:
24:        /**
25:         * Generate an anti-spam mailto link from an email address.
26:         * The output link looks something like this (where $1 is the username part of
27:         * the address and $2 is the hostname part:
28:         * <pre>
29:         * Contact us using:
30:         * &lt;script type="text/javascript"&gt;
31:         * var a = $1 + "@" + $2;
32:         * document.write("&lt;a href='mail" + "to:" + a + "'&gt;" + a + "&lt;/a&gt;");
33:         * &lt;/script&gt;
34:         * &lt;noscript&gt;[$1 at $2]&lt;/noscript&gt;
35:         * </pre>
36:         * @author Joe Walker [joe at getahead dot ltd dot uk]
37:         */
38:        public class Generator {
39:            /**
40:             * Generate an anti-spam mailto link from an email address
41:             * @param name The person to contact
42:             * @param email The address to generate a link from
43:             * @return The HTML snippet
44:             */
45:            public String generateAntiSpamMailto(String name, String email) {
46:                StringTokenizer st = new StringTokenizer(email, "@");
47:                if (Security.containsXssRiskyCharacters(email)
48:                        || st.countTokens() != 2) {
49:                    throw new IllegalArgumentException(
50:                            "Invalid email address: " + email);
51:                }
52:
53:                String before = st.nextToken();
54:                String after = st.nextToken();
55:
56:                StringBuffer buffer = new StringBuffer();
57:
58:                buffer.append("Contact ");
59:                buffer.append(Security.replaceXmlCharacters(name));
60:                buffer.append(" using: <span id=\"asmgLink\"></span>\n");
61:                buffer.append("<script type='text/javascript'>\n");
62:
63:                buffer.append("var before = '");
64:                buffer.append(before);
65:                buffer.append("';\n");
66:
67:                buffer.append("var after = '");
68:                buffer.append(after);
69:                buffer.append("';\n");
70:
71:                buffer
72:                        .append("var link = \"<a href='mail\" + \"to:\" + before + '@' + after + \"'>\" + before + '@' + after + \"</a>\";\n");
73:
74:                buffer
75:                        .append("document.getElementById(\"asmgLink\").innerHTML = link;\n");
76:                buffer.append("</script>\n");
77:                buffer.append("<noscript>[");
78:                buffer.append(before);
79:                buffer.append(" at ");
80:                buffer.append(after);
81:                buffer.append("]</noscript>\n");
82:
83:                return buffer.toString();
84:            }
85:        }