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1 package com.openinventions.webappfilter;
2
3 import org.apache.commons.logging.*;
4 import com.openinventions.metaframework.*;
5 import java.io.*;
6 import java.util.*;
7 import javax.servlet.*;
8 import javax.servlet.http.*;
9
10 public class ServletFilter extends DefaultFilter implements javax.servlet.Filter  {
11 private static final Log log = LogFactory.getLog(ServletFilter.class);
12 private static String rootDir = "";
13
14 public void init(FilterConfig filterConfig) throws ServletException {
15 try {
16 String file = filterConfig.getInitParameter("file");
17 this.rootDir = filterConfig.getServletContext().getRealPath("/");
18 if (this.rootDir.endsWith("/") || this.rootDir.endsWith("\\")) {
19 this.rootDir = this.rootDir.substring(0, this.rootDir.length() - 1);
20 }
21 if (log.isDebugEnabled()) {
22 log.debug("file = " + file);
23 }
24 ElementFactory factory = new JXPathElementFileFactory();
25 Element context = factory.createElement("context");
26 context.setValue("file", file);
27 context.setValue("rootDir", rootDir);
28 super.init(null, context);
29 } catch (Exception e) {
30 log.error(e);
31 throw new ServletException(e);
32 }
33 }
34
35 public void destroy() {
36 try {
37 ElementFactory factory = new JXPathElementFileFactory();
38 Element context = factory.createElement("context");
39 context.setValue("rootDir", rootDir);
40 super.destroy(null, context);
41 } catch (Exception e) {
42 log.error(e);
43 }
44 }
45
46 public void doFilter (ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException {
47 try {
48 State state = new DefaultState();
49 initState(state);
50 Element req = (Element) request.getAttribute("com.openinventions.webappsecurity.Request");
51 Element res = (Element) request.getAttribute("com.openinventions.webappsecurity.Response");
52 String direction = (String ) request.getAttribute("com.openinventions.webappsecurity.Direction");
53 if (log.isDebugEnabled()) {
54 log.debug("req = " + req);
55 log.debug("res = " + res);
56 log.debug("direction = " + direction);
57 }
58 state.set("nextCommand", "");
59 state.set("direction", direction);
60 state.set("req", req);
61 state.set("res", res);
62 state.set("rootDir", this.rootDir);
63 super.process(state, null);
64 request.setAttribute("com.openinventions.webappsecurity.Request", state.get("req"));
65 request.setAttribute("com.openinventions.webappsecurity.Response", state.get("res"));
66 request.setAttribute("com.openinventions.webappsecurity.Direction", state.get("direction"));
67
68 direction = (String ) state.get("direction");
69
70 if (log.isDebugEnabled()) {
71 log.debug("filterDirection = " + (String ) state.get("filterDirection"));
72 log.debug("direction = " + (String ) state.get("direction"));
73 log.debug("nextCommand = " + (String ) state.get("nextCommand"));
74 }
75
76 if (direction.equals("forward")) {
77 chain.doFilter(request, response);
78 }
79
80 direction = (String ) request.getAttribute("com.openinventions.webappsecurity.Direction");
81 state.set("direction", direction);
82
83 if (direction.equals("backward")) {
84 super.process(state, null);
85 request.setAttribute("com.openinventions.webappsecurity.Request", state.get("req"));
86 request.setAttribute("com.openinventions.webappsecurity.Response", state.get("res"));
87 request.setAttribute("com.openinventions.webappsecurity.Direction", direction);
88 }
89 } catch (Exception e) {
90 log.error(e);
91 throw new ServletException(e);
92 }
93 }
94 }
95
146
147
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