📄 contentcontainer.java
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/**
* Copyright (C) 2003 Manfred Andres
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/**
* The ContentContainer is used for delivering the entry-page, error-page, ...
*/
package freecs.content;
import freecs.*;
import freecs.core.*;
import freecs.interfaces.*;
import freecs.layout.*;
import java.nio.charset.Charset;
import java.nio.charset.CharacterCodingException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
public class ContentContainer implements IResponseHeaders, IContainer {
private CharBuffer cb;
private ByteBuffer buf;
private TemplateSet ts = null;
private String tName;
private Template tpl = null;
private String cookie = null,
contentType="text/html";
private boolean chunkedHdr,
nocache=false,
nostore=false,
keepAlive = false,
isMessages = false,
isRedirect,
isHTTP11=true;
private short resCode = 200;
public ContentContainer () { }
/**
* wraps the cntnt param into a fully http-response with the wanted headerfields
* @param cntnt
*/
public void wrap (String cntnt) {
StringBuffer sb = new StringBuffer ();
sb.append (isHTTP11 ? "HTTP/1.1" : "HTTP/1.0");
switch (resCode) {
case OK_CODE:
sb.append (OK_HDR);
break;
case REDIRECT_CODE:
setRedirectTo (cntnt);
break;
case NOCONTENT_CODE:
sb.append (NOCONTENT_HDR);
cb = CharBuffer.wrap (sb.toString());
return;
case NOTFOUND_CODE:
sb.append (NOTFOUND_HDR);
cb = CharBuffer.wrap (sb.toString());
return;
}
sb.append ("Content-Type: ");
sb.append (contentType);
sb.append ("; charset=");
sb.append (Server.srv.DEFAULT_CHARSET);
if (nocache) {
sb.append ("\r\nPragma: no-cache\r\nCache-Control: no-cache");
} else if (nostore) {
sb.append ("\r\nCache-Control: no-store");
}
sb = appendCookie (sb);
if (!isHTTP11 || !keepAlive || isMessages) {
sb.append ("\r\nConnection: close\r\nProxy-Connection: close");
} else {
sb.append ("\r\nConnection: Keep-Alive\r\nProxy-Connection: Keep-Alive");
if (!chunkedHdr) {
sb.append("\r\nContent-Length: ");
sb.append (cntnt.length ());
}
}
if (chunkedHdr) {
sb.append ("\r\nTransfer-Encoding: chunked\r\n\r\n");
sb.append (Integer.toHexString (cntnt.length ()));
sb.append ("\r\n");
sb.append (cntnt);
sb.append ("\r\n");
cb = CharBuffer.wrap (sb.toString());
return;
}
sb.append ("\r\n\r\n");
sb.append (cntnt);
cb = CharBuffer.wrap (sb.toString());
}
/**
* sets the HTTP-Response-Code
* @param code
*/
public void setResCode (short code) {
resCode=code;
}
/**
* append the cookie-header-field to the given StringBuffer
* @param sb the stringbuffer to append the cookie-header-field
* @return the stringbuffer with the cookie-header-field appended
*/
public StringBuffer appendCookie (StringBuffer sb) {
if (cookie == null) return sb;
sb.append ("\r\n");
sb.append ("Set-Cookie: FreeCSSession=");
sb.append (cookie);
sb.append ("; path=/;");
if (Server.srv.COOKIE_DOMAIN != null) {
sb.append (" Domain=");
sb.append (Server.srv.COOKIE_DOMAIN);
}
return sb;
}
/**
* causes this content-container to use a specific template-set
* @param ts the template-set to use
*/
public void useTemplateSet (TemplateSet ts) {
this.ts = ts;
}
/**
* set the template to be rendered for this content-container
* @param tName the name of the template
*/
public void setTemplate (String tName) {
this.tName = tName;
}
/**
* renders the template and wraps it to a full httpresponse
*/
public void renderTemplate () {
if (tName.equals ("state")) {
renderState ();
return;
}
if (tpl == null) {
if (this.ts == null) ts = Server.srv.templatemanager.getTemplateSet ("default");
tpl = ts.getTemplate (tName);
if (tpl == null) tpl = ts.getTemplate ("not_found");
}
if (tpl.isRedirect ()) {
this.setRedirectTo(tpl.getDestination ());
return;
}
String cntnt = tpl.render ();
if (cntnt.length () < 1) {
Server.log ("ContentContainer.renderTemplate: rendered template has no content", Server.MSG_STATE, Server.LVL_MAJOR);
resCode=NOCONTENT_CODE;
wrap (null);
return;
}
wrap (cntnt);
}
/**
* causes the response to be a chunked response
* the calling method has to care, that the other chunks are sent correctly
*/
public void useChunkedHeader () {
chunkedHdr = true;
keepAlive = true;
}
/**
* set/unset the keep-alive header field
* @param b
*/
public void setKeepAlive (boolean b) {
keepAlive = b;
}
/**
* mark this http-response as http11(true)/http10(false)
* @param b
*/
public void setHTTP11 (boolean b) {
isHTTP11 = b;
keepAlive = true;
}
/**
* check if this response is a HTTP11 response
* @return boolean true if response is a HTTP11 response, false if not
*/
public boolean isHttp11 () {
return isHTTP11;
}
/**
* set the cookievalue to append to the response-header-fields
* @param cookie
*/
public void setCookie (String cookie) {
this.cookie = cookie;
}
/**
* return the bytebuffer which is ready to send
*/
public ByteBuffer getByteBuffer () {
return buf;
}
/**
* prepares the response for sending
* if a template is set, it will be rendered
* if no charbuffer is present, even after rendering the template,
* there is nothing to send and prepareForSending will just return
*/
public boolean prepareForSending () {
if (tName != null || tpl != null) renderTemplate ();
if (cb == null) return false;
try {
buf = Charset.forName (Server.srv.DEFAULT_CHARSET).newEncoder ().encode (cb);
return true;
} catch (CharacterCodingException cce) {
Server.debug ("ContentContainer.prepareForSending: ", cce, Server.MSG_ERROR, Server.LVL_MINOR);
try {
String s = cb.toString ();
buf = ByteBuffer.wrap (s.getBytes ());
return true;
} catch (Exception e) {
Server.debug ("ContentContainer.prepareForSending: ", e, Server.MSG_ERROR, Server.LVL_MAJOR);
return false;
}
}
}
public boolean hasContent () {
return (buf != null);
}
public boolean closeSocket () {
return (!isHTTP11 || !keepAlive) && !isMessages;
}
public void setIsMessages () {
this.isMessages = true;
}
public void setNoCache () {
nocache = true;
}
public void setNoStore () {
nostore = true;
}
/* public void finalize () {
Server.log ("ContentContainer FINALIZED*******************************", Server.MSG_STATE, Server.LVL_VERY_VERBOSE);
} */
private void renderState () {
StringBuffer c = new StringBuffer ();
c.append ("<html><head><title>state query</title><meta http-equiv=\"refresh\" content=\"4\"></head><body bgcolor=ffff99 text=000000><table border=0><tr><td colspan=4 align=center>FreeCS (");
c.append (Server.getVersion ());
c.append (")</td></tr><tr><td width=10></td><td witdh=200 align=right>Anzahl der User:</td><td width=10></td><td width=400>");
UserManager umgr = UserManager.mgr;
c.append (umgr.getActiveUserCount ());
c.append ("(");
c.append (umgr.getHighWaterMark());
c.append (" max)");
c.append ("</td></tr><tr><td colspan=4 bgcolor=000000 height=1></td></tr><tr><td width=10></td><td witdh=200 align=right>Anzahl der R鋟me:</td><td width=10></td><td width=400>");
GroupManager gmgr = GroupManager.mgr;
c.append (gmgr.size ());
c.append ("(");
c.append (gmgr.getHighWaterMark());
c.append (" max)");
c.append ("</td></tr><tr><td colspan=4 bgcolor=000000 height=1></td></tr><tr><td width=10></td><td witdh=200 align=right>Anzahl der Reader-Threads:</td><td width=10></td><td width=400>");
c.append (RequestReader.activeReaders ());
if (!Server.srv.THREAD_PER_READ) {
c.append ("</td></tr><tr><td colspan=4 bgcolor=000000 height=1></td></tr><tr><td width=10></td><td witdh=200 align=right>Reader-Queue-Usage:</td><td width=10></td><td width=400>");
double d[] = RequestReader.getOveralUsage();
for (int i = 0; i < d.length; i++) {
c.append (d[i]);
c.append ("%");
if (i < d.length)
c.append (", ");
}
}
c.append ("</td></tr><tr><td colspan=4 bgcolor=000000 height=1></td></tr><tr><td width=10></td><td witdh=200 align=right>Speicher:</td><td width=10></td><td width=400>");
Runtime r = Runtime.getRuntime ();
long free = r.freeMemory ();
long total = r.totalMemory ();
long max = r.maxMemory ();
long used = total - free;
c.append ("free: ");
c.append (free);
c.append ("<br>used: ");
c.append (used);
c.append ("<br>total/maxTotal: ");
c.append (total);
c.append ("/");
c.append (max);
c.append ("<br>Usagepercentage: ");
c.append (100 - (free / (total / 100)));
c.append ("</td></tr></table></body></html>");
wrap (c.toString());
}
/**
* construct a HTTP-Redirect-Response
* @param dest the destination to redirect to
*/
public void setRedirectTo (String dest) {
StringBuffer cntnt = new StringBuffer();
cntnt.append ("<html><head><title>redirection</title><head><body>Redirected to <a href=\"");
cntnt.append (dest);
cntnt.append ("\">");
cntnt.append (dest);
cntnt.append ("</a>");
cntnt.append ("</body></html>");
int len = cntnt.length ();
StringBuffer sb = new StringBuffer ();
sb.append (isHTTP11 ? "HTTP/1.1" : "HTTP/1.0");
sb.append (REDIRECT_HDR);
sb.append (Server.srv.DEFAULT_CHARSET);
sb.append ("\r\nLocation: ");
sb.append (dest);
sb.append ("\r\nContent-Length: ");
sb.append (len);
sb = appendCookie (sb);
sb.append ("\r\n\r\n");
sb.append (cntnt);
cb = CharBuffer.wrap (sb.toString ());
isRedirect = true;
}
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