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25 package org.snipsnap.net;
26
27 import org.snipsnap.app.Application;
28 import org.snipsnap.config.Configuration;
29 import org.snipsnap.container.Components;
30 import org.snipsnap.snip.Snip;
31 import org.snipsnap.snip.SnipSpace;
32 import org.snipsnap.util.ApplicationAwareMap;
33
34 import javax.servlet.ServletException  ;
35 import javax.servlet.http.HttpServlet ;
36 import javax.servlet.http.HttpServletRequest ;
37 import javax.servlet.http.HttpServletResponse ;
38 import javax.servlet.http.HttpSession ;
39 import java.io.BufferedWriter ;
40 import java.io.IOException ;
41 import java.io.OutputStreamWriter ;
42 import java.sql.Timestamp ;
43 import java.util.HashMap ;
44
45
51 public class CssHandlerServlet extends HttpServlet {
52 private final static String THEME_NAME = "snipsnap.theme.name";
53
54 ApplicationAwareMap styleSheets = new ApplicationAwareMap(HashMap .class, HashMap .class);
55 ApplicationAwareMap timeStamps = new ApplicationAwareMap(HashMap .class, HashMap .class);
56
57 private String getStyleSheet(HttpServletRequest request) {
58 String theme = getTheme(request);
59 String id = request.getPathInfo();
60 String themeId = theme + id;
61 Snip cssSnip = (Snip) styleSheets.getMap().get(themeId);
63 Timestamp cssTimestamp = (Timestamp ) timeStamps.getMap().get(themeId);
64 if (null == cssSnip || null == cssTimestamp || cssSnip.getMTime().after(cssTimestamp)) {
65 SnipSpace space = (SnipSpace) Components.getComponent(SnipSpace.class);
66 String snipName = Configuration.SNIPSNAP_THEMES + "/" + theme + ("/default.css".equals(id) ? "/css" : id);
67 cssSnip = space.load(snipName);
68 styleSheets.getMap().put(themeId, cssSnip);
69 timeStamps.getMap().put(themeId, cssSnip.getMTime().clone());
70 }
71
72 return cssSnip.getContent();
73 }
74
75 protected long getLastModified(HttpServletRequest request) {
76 Timestamp ts = (Timestamp ) timeStamps.getMap().get(getTheme(request) + request.getPathInfo());
77 return (ts != null ? ts.getTime() / 1000 * 1000 : super.getLastModified(request));
78 }
79
80 private String getTheme(HttpServletRequest request) {
81 HttpSession session = request.getSession();
82 String sessionTheme = (String ) session.getAttribute(THEME_NAME);
83 Configuration config = Application.get().getConfiguration();
84 return sessionTheme == null ? config.getTheme() : sessionTheme;
85 }
86
87 public void doGet(HttpServletRequest request, HttpServletResponse response)
88 throws ServletException , IOException {
89 if (request.getParameter("theme") != null) {
90 HttpSession session = request.getSession();
91 session.setAttribute(THEME_NAME, request.getParameter("theme"));
92 timeStamps.getMap().clear();
93 String referer = request.getHeader("REFERER");
94 if (referer == null || referer.length() == 0) {
95 Configuration config = Application.get().getConfiguration();
96 referer = config.getSnipUrl(config.getStartSnip());
97 }
98 response.sendRedirect(referer);
99 return;
100 }
101 try {
102 String content = getStyleSheet(request);
103 response.setContentType("text/css");
104 response.setContentLength(content.length());
105 BufferedWriter writer = new BufferedWriter (new OutputStreamWriter (response.getOutputStream()));
106 writer.write(content);
107 writer.flush();
108 } catch (Exception e) {
109 response.sendError(HttpServletResponse.SC_NOT_FOUND);
110 return;
111 }
112 }
113 }
114 |
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