5 import javax.servlet.*;
6 import javax.servlet.http.*;
10 import ibex.util.Collections;
13 import org.prevayler.*;
14 import org.prevayler.implementation.snapshot.*;
16 public class Servlet extends HttpServlet {
19 private Prevayler prevayler;
21 private ServletContext cx = null;
23 public void destroy() { try {
24 synchronized(this.getClass()) {
25 Prevayler privatePrevayler = prevayler;
26 if (prevayler == null) return;
28 Prevalence.destroy(cx, prevayler);
30 } catch (Exception e) { e.printStackTrace(); } }
32 public void init(ServletConfig sc) throws ServletException {
33 cx = sc.getServletContext();
34 prevayler = Prevalence.getPrevayler(cx);
35 prevalent = (JS)prevayler.prevalentSystem();
38 public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { doGet(request, response); }
39 public void doGet(HttpServletRequest rq, HttpServletResponse rs) throws IOException {
40 String path = cx.getRealPath(rq.getServletPath());
41 Servlet.Scope scope = new Servlet.Scope(cx, rq, rs, prevayler);
42 try { Template.wrap(Template.parse(path, scope), scope).toXML(rs.getWriter()); }
43 catch (Exception e) { e.printStackTrace(); System.out.println("e = "+e); }
46 public static class Scope extends Template.Scope {
47 private final ServletContext cx;
48 private final HttpServletRequest request;
49 private final HttpServletResponse response;
50 private final Prevayler prevayler;
52 public Scope(ServletContext cx, HttpServletRequest rq, HttpServletResponse rs, Prevayler p) {
53 super(null); this.cx = cx; request = rq; response = rs; prevayler = p;
56 public String getLocalPath() { return cx.getRealPath("/") + "/WEB-INF/"; }
57 public void transaction(JS t) {
58 try { prevayler.execute(new Prevalence.JSTransaction(t)); }
59 catch (Exception e) { e.printStackTrace(); throw new RuntimeException(e); }
62 private JS params = new JS() {
63 private List keys = null;
64 public Object get(Object key) { return request.getParameter(JS.toString(key)); }
65 public Collection keys() {
66 return keys == null ? keys = Collections.list(request.getParameterNames()) : keys; }
68 private JS cookies = new JS() {
70 public Object get(Object key) { return request.getCookie(JS.toString(key)); }
71 public Enumeration keys() { return request.getCookieNames(); }
74 private JS sessionAttributes = new JS() {
75 private List keys = null;
76 public Object get(Object key) {
77 return request.getSession(true).getAttribute(JS.toString(key)); }
78 public void put(Object key, Object val) {
79 if (val == null) request.getSession(true).removeAttribute(JS.toString(key));
80 else request.setAttribute(JS.toString(key), val); }
81 public Collection keys() {
82 return keys == null ? keys = Collections.list(request.getSession(true).getAttributeNames()) : keys; }
84 private JS requestHeader = new JS() {
85 private List keys = null;
86 public Object get(Object key) { return request.getHeader(JS.toString(key)); }
87 public Collection keys() {
88 return keys == null ? keys = Collections.list(request.getHeaderNames()) : keys; }
90 private JS responseHeader = new JS() {
91 public void put(Object key, Object val) {
92 response.setHeader(JS.toString(key), JS.toString(val)); }
96 /** lets us put multi-level get/put/call keys all in the same method */
97 private class Sub extends JS {
99 Sub(Object key) { this.key = key; }
100 public void put(Object key, Object val) throws JSExn {
101 Scope.this.put(JS.toString(this.key) + "." + JS.toString(key), val); }
102 public Object get(Object key) throws JSExn {
103 return Scope.this.get(JS.toString(this.key) + "." + JS.toString(key)); }
104 public Object call(Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
105 return Scope.this.callMethod(this.key, a0, a1, a2, rest, nargs);
107 public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
108 return Scope.this.callMethod(JS.toString(this.key) + "."
109 + JS.toString(method), a0, a1, a2, rest, nargs);
112 private Sub getSub(String key) { return new Sub(key); }
114 public Object callMethod(Object method, final Object a, final Object b, Object c, Object[] rest, int nargs) throws JSExn {
116 case "session.invalidate": request.getSession(true).invalidate(); return null;
118 String path = JS.toString(a);
119 if (path.indexOf("..") != -1) throw new JSExn("cannot use .. in paths");
120 File f = new File(cx.getRealPath("/") + File.separatorChar + path);
121 if (!f.isDirectory()) return null;
122 String[] contents = f.list();
123 JSArray ret = new JSArray(contents.length);
124 for(int i=0; i<contents.length; i++) ret.add(contents[i]);
129 public Object get(Object key) throws JSExn {
132 case "arg": return null;
133 case "prevalent": return prevayler.prevalentSystem();
134 case "request": return getSub("request");
135 case "request.user": return request.getRemoteUser();
136 case "request.header": return requestHeader;
137 case "request.method": return request.getMethod();
138 case "request.remote": return getSub("request.remote");
139 case "request.remote.ip": return request.getRemoteAddr();
140 case "request.remote.host": return request.getRemoteHost();
141 case "request.ssl": return new Boolean(request.isSecure());
142 case "request.path": return request.getPathInfo();
143 case "response": return getSub("response");
144 case "response.header": return responseHeader;
145 case "session": return getSub("session");
146 case "session.attr": return sessionAttributes;
147 case "session.created": return new JSDate(request.getSession(true).getCreationTime());
148 case "session.accessed": return new JSDate(request.getSession(true).getLastAccessedTime());
149 case "session.invalidate": return METHOD;
150 case "page": return getSub("page");
151 //case "page.lastmodified": return new JSDate(new File(path).lastModified()); FIXME
152 case "context": return getSub("context");
153 case "context.list": return METHOD;
154 case "params": return params;
155 case "cookie": return cookies;
156 case "xt.date": return new JSDate(); // TODO: discuss
160 public void put(Object key, Object val) throws JSExn {
162 //#switch(JS.toString(key))
163 case "transaction": transaction((JS)val);
164 case "response.code": response.setStatus(JS.toInt(val));
165 case "response.redirect": response.sendRedirect(JS.toString(val));
166 case "response.contentType": response.setContentType(JS.toString(val));
168 } catch (IOException e) {