org.eclipse.jetty.servlet.DefaultServlet Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.servlet;
import static org.eclipse.jetty.http.GzipHttpContent.ETAG_GZIP_QUOTE;
import static org.eclipse.jetty.http.GzipHttpContent.removeGzipFromETag;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.StringTokenizer;
import javax.servlet.AsyncContext;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.DateParser;
import org.eclipse.jetty.http.HttpContent;
import org.eclipse.jetty.http.HttpField;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpHeader;
import org.eclipse.jetty.http.HttpMethod;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.http.PathMap.MappedEntry;
import org.eclipse.jetty.http.PreEncodedHttpField;
import org.eclipse.jetty.http.QuotedCSV;
import org.eclipse.jetty.io.WriterOutputStream;
import org.eclipse.jetty.server.HttpOutput;
import org.eclipse.jetty.server.InclusiveByteRange;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.ResourceCache;
import org.eclipse.jetty.server.ResourceContentFactory;
import org.eclipse.jetty.server.Response;
import org.eclipse.jetty.server.handler.ContextHandler;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.IO;
import org.eclipse.jetty.util.MultiPartOutputStream;
import org.eclipse.jetty.util.URIUtil;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.util.resource.ResourceCollection;
import org.eclipse.jetty.util.resource.ResourceFactory;
/**
* The default servlet.
*
* This servlet, normally mapped to /, provides the handling for static
* content, OPTION and TRACE methods for the context.
* The following initParameters are supported, these can be set either
* on the servlet itself or as ServletContext initParameters with a prefix
* of org.eclipse.jetty.servlet.Default. :
*
* acceptRanges If true, range requests and responses are
* supported
*
* dirAllowed If true, directory listings are returned if no
* welcome file is found. Else 403 Forbidden.
*
* welcomeServlets If true, attempt to dispatch to welcome files
* that are servlets, but only after no matching static
* resources could be found. If false, then a welcome
* file must exist on disk. If "exact", then exact
* servlet matches are supported without an existing file.
* Default is true.
*
* This must be false if you want directory listings,
* but have index.jsp in your welcome file list.
*
* redirectWelcome If true, welcome files are redirected rather than
* forwarded to.
*
* gzip If set to true, then static content will be served as
* gzip content encoded if a matching resource is
* found ending with ".gz"
*
* resourceBase Set to replace the context resource base
*
* resourceCache If set, this is a context attribute name, which the servlet
* will use to look for a shared ResourceCache instance.
*
* relativeResourceBase
* Set with a pathname relative to the base of the
* servlet context root. Useful for only serving static content out
* of only specific subdirectories.
*
* pathInfoOnly If true, only the path info will be applied to the resourceBase
*
* stylesheet Set with the location of an optional stylesheet that will be used
* to decorate the directory listing html.
*
* etags If True, weak etags will be generated and handled.
*
* maxCacheSize The maximum total size of the cache or 0 for no cache.
* maxCachedFileSize The maximum size of a file to cache
* maxCachedFiles The maximum number of files to cache
*
* useFileMappedBuffer
* If set to true, it will use mapped file buffer to serve static content
* when using NIO connector. Setting this value to false means that
* a direct buffer will be used instead of a mapped file buffer.
* This is set to false by default by this class, but may be overridden
* by eg webdefault.xml
*
* cacheControl If set, all static content will have this value set as the cache-control
* header.
*
* otherGzipFileExtensions
* Other file extensions that signify that a file is gzip compressed. Eg ".svgz"
*
*
*
*
*/
public class DefaultServlet extends HttpServlet implements ResourceFactory
{
private static final Logger LOG = Log.getLogger(DefaultServlet.class);
private static final long serialVersionUID = 4930458713846881193L;
private static final PreEncodedHttpField ACCEPT_RANGES = new PreEncodedHttpField(HttpHeader.ACCEPT_RANGES, "bytes");
private ServletContext _servletContext;
private ContextHandler _contextHandler;
private boolean _acceptRanges=true;
private boolean _dirAllowed=true;
private boolean _welcomeServlets=false;
private boolean _welcomeExactServlets=false;
private boolean _redirectWelcome=false;
private boolean _gzip=false;
private boolean _pathInfoOnly=false;
private boolean _etags=false;
private Resource _resourceBase;
private ResourceCache _cache;
private HttpContent.Factory _contentFactory;
private MimeTypes _mimeTypes;
private String[] _welcomes;
private Resource _stylesheet;
private boolean _useFileMappedBuffer=false;
private HttpField _cacheControl;
private String _relativeResourceBase;
private ServletHandler _servletHandler;
private ServletHolder _defaultHolder;
private List _gzipEquivalentFileExtensions;
/* ------------------------------------------------------------ */
@Override
public void init()
throws UnavailableException
{
_servletContext=getServletContext();
_contextHandler = initContextHandler(_servletContext);
_mimeTypes = _contextHandler.getMimeTypes();
_welcomes = _contextHandler.getWelcomeFiles();
if (_welcomes==null)
_welcomes=new String[] {"index.html","index.jsp"};
_acceptRanges=getInitBoolean("acceptRanges",_acceptRanges);
_dirAllowed=getInitBoolean("dirAllowed",_dirAllowed);
_redirectWelcome=getInitBoolean("redirectWelcome",_redirectWelcome);
_gzip=getInitBoolean("gzip",_gzip);
_pathInfoOnly=getInitBoolean("pathInfoOnly",_pathInfoOnly);
if ("exact".equals(getInitParameter("welcomeServlets")))
{
_welcomeExactServlets=true;
_welcomeServlets=false;
}
else
_welcomeServlets=getInitBoolean("welcomeServlets", _welcomeServlets);
_useFileMappedBuffer=getInitBoolean("useFileMappedBuffer",_useFileMappedBuffer);
_relativeResourceBase = getInitParameter("relativeResourceBase");
String rb=getInitParameter("resourceBase");
if (rb!=null)
{
if (_relativeResourceBase!=null)
throw new UnavailableException("resourceBase & relativeResourceBase");
try{_resourceBase=_contextHandler.newResource(rb);}
catch (Exception e)
{
LOG.warn(Log.EXCEPTION,e);
throw new UnavailableException(e.toString());
}
}
String css=getInitParameter("stylesheet");
try
{
if(css!=null)
{
_stylesheet = Resource.newResource(css);
if(!_stylesheet.exists())
{
LOG.warn("!" + css);
_stylesheet = null;
}
}
if(_stylesheet == null)
{
_stylesheet = Resource.newResource(this.getClass().getResource("/jetty-dir.css"));
}
}
catch(Exception e)
{
LOG.warn(e.toString());
LOG.debug(e);
}
String cc=getInitParameter("cacheControl");
if (cc!=null)
_cacheControl=new PreEncodedHttpField(HttpHeader.CACHE_CONTROL, cc);
String resourceCache = getInitParameter("resourceCache");
int max_cache_size=getInitInt("maxCacheSize", -2);
int max_cached_file_size=getInitInt("maxCachedFileSize", -2);
int max_cached_files=getInitInt("maxCachedFiles", -2);
if (resourceCache!=null)
{
if (max_cache_size!=-1 || max_cached_file_size!= -2 || max_cached_files!=-2)
LOG.debug("ignoring resource cache configuration, using resourceCache attribute");
if (_relativeResourceBase!=null || _resourceBase!=null)
throw new UnavailableException("resourceCache specified with resource bases");
_cache=(ResourceCache)_servletContext.getAttribute(resourceCache);
if (LOG.isDebugEnabled())
LOG.debug("Cache {}={}",resourceCache,_contentFactory);
}
_etags = getInitBoolean("etags",_etags);
try
{
if (_cache==null && (max_cached_files!=-2 || max_cache_size!=-2 || max_cached_file_size!=-2))
{
_cache = new ResourceCache(null,this,_mimeTypes,_useFileMappedBuffer,_etags,_gzip);
if (max_cache_size>=0)
_cache.setMaxCacheSize(max_cache_size);
if (max_cached_file_size>=-1)
_cache.setMaxCachedFileSize(max_cached_file_size);
if (max_cached_files>=-1)
_cache.setMaxCachedFiles(max_cached_files);
_servletContext.setAttribute(resourceCache==null?"resourceCache":resourceCache,_cache);
}
}
catch (Exception e)
{
LOG.warn(Log.EXCEPTION,e);
throw new UnavailableException(e.toString());
}
if (_cache!=null)
_contentFactory=_cache;
else
{
_contentFactory=new ResourceContentFactory(this,_mimeTypes,_gzip);
if (resourceCache!=null)
_servletContext.setAttribute(resourceCache,_contentFactory);
}
_gzipEquivalentFileExtensions = new ArrayList();
String otherGzipExtensions = getInitParameter("otherGzipFileExtensions");
if (otherGzipExtensions != null)
{
//comma separated list
StringTokenizer tok = new StringTokenizer(otherGzipExtensions,",",false);
while (tok.hasMoreTokens())
{
String s = tok.nextToken().trim();
_gzipEquivalentFileExtensions.add((s.charAt(0)=='.'?s:"."+s));
}
}
else
{
//.svgz files are gzipped svg files and must be served with Content-Encoding:gzip
_gzipEquivalentFileExtensions.add(".svgz");
}
_servletHandler= _contextHandler.getChildHandlerByClass(ServletHandler.class);
for (ServletHolder h :_servletHandler.getServlets())
if (h.getServletInstance()==this)
_defaultHolder=h;
if (LOG.isDebugEnabled())
LOG.debug("resource base = "+_resourceBase);
}
/**
* Compute the field _contextHandler.
* In the case where the DefaultServlet is deployed on the HttpService it is likely that
* this method needs to be overwritten to unwrap the ServletContext facade until we reach
* the original jetty's ContextHandler.
* @param servletContext The servletContext of this servlet.
* @return the jetty's ContextHandler for this servletContext.
*/
protected ContextHandler initContextHandler(ServletContext servletContext)
{
ContextHandler.Context scontext=ContextHandler.getCurrentContext();
if (scontext==null)
{
if (servletContext instanceof ContextHandler.Context)
return ((ContextHandler.Context)servletContext).getContextHandler();
else
throw new IllegalArgumentException("The servletContext " + servletContext + " " +
servletContext.getClass().getName() + " is not " + ContextHandler.Context.class.getName());
}
else
return ContextHandler.getCurrentContext().getContextHandler();
}
/* ------------------------------------------------------------ */
@Override
public String getInitParameter(String name)
{
String value=getServletContext().getInitParameter("org.eclipse.jetty.servlet.Default."+name);
if (value==null)
value=super.getInitParameter(name);
return value;
}
/* ------------------------------------------------------------ */
private boolean getInitBoolean(String name, boolean dft)
{
String value=getInitParameter(name);
if (value==null || value.length()==0)
return dft;
return (value.startsWith("t")||
value.startsWith("T")||
value.startsWith("y")||
value.startsWith("Y")||
value.startsWith("1"));
}
/* ------------------------------------------------------------ */
private int getInitInt(String name, int dft)
{
String value=getInitParameter(name);
if (value==null)
value=getInitParameter(name);
if (value!=null && value.length()>0)
return Integer.parseInt(value);
return dft;
}
/* ------------------------------------------------------------ */
/** get Resource to serve.
* Map a path to a resource. The default implementation calls
* HttpContext.getResource but derived servlets may provide
* their own mapping.
* @param pathInContext The path to find a resource for.
* @return The resource to serve.
*/
@Override
public Resource getResource(String pathInContext)
{
Resource r=null;
if (_relativeResourceBase!=null)
pathInContext=URIUtil.addPaths(_relativeResourceBase,pathInContext);
try
{
if (_resourceBase!=null)
{
r = _resourceBase.addPath(pathInContext);
if (!_contextHandler.checkAlias(pathInContext,r))
r=null;
}
else if (_servletContext instanceof ContextHandler.Context)
{
r = _contextHandler.getResource(pathInContext);
}
else
{
URL u = _servletContext.getResource(pathInContext);
r = _contextHandler.newResource(u);
}
if (LOG.isDebugEnabled())
LOG.debug("Resource "+pathInContext+"="+r);
}
catch (IOException e)
{
LOG.ignore(e);
}
if((r==null || !r.exists()) && pathInContext.endsWith("/jetty-dir.css"))
r=_stylesheet;
return r;
}
/* ------------------------------------------------------------ */
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
String servletPath=null;
String pathInfo=null;
Enumeration reqRanges = null;
boolean included =request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI)!=null;
if (included)
{
servletPath=(String)request.getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH);
pathInfo=(String)request.getAttribute(RequestDispatcher.INCLUDE_PATH_INFO);
if (servletPath==null)
{
servletPath=request.getServletPath();
pathInfo=request.getPathInfo();
}
}
else
{
servletPath = _pathInfoOnly?"/":request.getServletPath();
pathInfo = request.getPathInfo();
// Is this a Range request?
reqRanges = request.getHeaders(HttpHeader.RANGE.asString());
if (!hasDefinedRange(reqRanges))
reqRanges = null;
}
String pathInContext=URIUtil.addPaths(servletPath,pathInfo);
boolean endsWithSlash=(pathInfo==null?request.getServletPath():pathInfo).endsWith(URIUtil.SLASH);
boolean gzippable=_gzip && !endsWithSlash && !included && reqRanges==null;
HttpContent content=null;
boolean release_content=true;
try
{
// Find the content
content=_contentFactory.getContent(pathInContext,response.getBufferSize());
if (LOG.isDebugEnabled())
LOG.info("content={}",content);
// Not found?
if (content==null || !content.getResource().exists())
{
if (included)
throw new FileNotFoundException("!" + pathInContext);
response.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
// Directory?
if (content.getResource().isDirectory())
{
sendWelcome(content,pathInContext,endsWithSlash,included,request,response);
return;
}
// Strip slash?
if (endsWithSlash && pathInContext.length()>1)
{
String q=request.getQueryString();
pathInContext=pathInContext.substring(0,pathInContext.length()-1);
if (q!=null&&q.length()!=0)
pathInContext+="?"+q;
response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(_servletContext.getContextPath(),pathInContext)));
return;
}
// Conditional response?
if (!included && !passConditionalHeaders(request,response,content))
return;
// Gzip?
HttpContent gzip_content = gzippable?content.getGzipContent():null;
if (gzip_content!=null)
{
// Tell caches that response may vary by accept-encoding
response.addHeader(HttpHeader.VARY.asString(),HttpHeader.ACCEPT_ENCODING.asString());
// Does the client accept gzip?
String accept=request.getHeader(HttpHeader.ACCEPT_ENCODING.asString());
if (accept!=null && accept.indexOf("gzip")>=0)
{
if (LOG.isDebugEnabled())
LOG.debug("gzip={}",gzip_content);
content=gzip_content;
}
}
// TODO this should be done by HttpContent#getContentEncoding
if (isGzippedContent(pathInContext))
response.setHeader(HttpHeader.CONTENT_ENCODING.asString(),"gzip");
// Send the data
release_content=sendData(request,response,included,content,reqRanges);
}
catch(IllegalArgumentException e)
{
LOG.warn(Log.EXCEPTION,e);
if(!response.isCommitted())
response.sendError(500, e.getMessage());
}
finally
{
if (release_content)
{
if (content!=null)
content.release();
}
}
}
protected void sendWelcome(HttpContent content, String pathInContext, boolean endsWithSlash, boolean included, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
// Redirect to directory
if (!endsWithSlash || (pathInContext.length()==1 && request.getAttribute("org.eclipse.jetty.server.nullPathInfo")!=null))
{
StringBuffer buf=request.getRequestURL();
synchronized(buf)
{
int param=buf.lastIndexOf(";");
if (param<0)
buf.append('/');
else
buf.insert(param,'/');
String q=request.getQueryString();
if (q!=null&&q.length()!=0)
{
buf.append('?');
buf.append(q);
}
response.setContentLength(0);
response.sendRedirect(response.encodeRedirectURL(buf.toString()));
}
return;
}
// look for a welcome file
String welcome=getWelcomeFile(pathInContext);
if (welcome!=null)
{
if (LOG.isDebugEnabled())
LOG.debug("welcome={}",welcome);
if (_redirectWelcome)
{
// Redirect to the index
response.setContentLength(0);
String q=request.getQueryString();
if (q!=null&&q.length()!=0)
response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths( _servletContext.getContextPath(),welcome)+"?"+q));
else
response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths( _servletContext.getContextPath(),welcome)));
}
else
{
// Forward to the index
RequestDispatcher dispatcher=request.getRequestDispatcher(welcome);
if (dispatcher!=null)
{
if (included)
dispatcher.include(request,response);
else
{
request.setAttribute("org.eclipse.jetty.server.welcome",welcome);
dispatcher.forward(request,response);
}
}
}
return;
}
if (included || passConditionalHeaders(request,response, content))
sendDirectory(request,response,content.getResource(),pathInContext);
}
/* ------------------------------------------------------------ */
protected boolean isGzippedContent(String path)
{
if (path == null) return false;
for (String suffix:_gzipEquivalentFileExtensions)
if (path.endsWith(suffix))
return true;
return false;
}
/* ------------------------------------------------------------ */
private boolean hasDefinedRange(Enumeration reqRanges)
{
return (reqRanges!=null && reqRanges.hasMoreElements());
}
/* ------------------------------------------------------------ */
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
doGet(request,response);
}
/* ------------------------------------------------------------ */
/* (non-Javadoc)
* @see javax.servlet.http.HttpServlet#doTrace(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
@Override
protected void doTrace(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
}
/* ------------------------------------------------------------ */
@Override
protected void doOptions(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
resp.setHeader("Allow", "GET,HEAD,POST,OPTIONS");
}
/* ------------------------------------------------------------ */
/**
* Finds a matching welcome file for the supplied {@link Resource}. This will be the first entry in the list of
* configured {@link #_welcomes welcome files} that existing within the directory referenced by the Resource.
* If the resource is not a directory, or no matching file is found, then it may look for a valid servlet mapping.
* If there is none, then null is returned.
* The list of welcome files is read from the {@link ContextHandler} for this servlet, or
* "index.jsp" , "index.html" if that is null.
* @param resource
* @return The path of the matching welcome file in context or null.
* @throws IOException
* @throws MalformedURLException
*/
private String getWelcomeFile(String pathInContext) throws MalformedURLException, IOException
{
if (_welcomes==null)
return null;
String welcome_servlet=null;
for (int i=0;i<_welcomes.length;i++)
{
String welcome_in_context=URIUtil.addPaths(pathInContext,_welcomes[i]);
Resource welcome=getResource(welcome_in_context);
if (welcome!=null && welcome.exists())
return _welcomes[i];
if ((_welcomeServlets || _welcomeExactServlets) && welcome_servlet==null)
{
MappedEntry entry=_servletHandler.getHolderEntry(welcome_in_context);
if (entry!=null && entry.getValue()!=_defaultHolder &&
(_welcomeServlets || (_welcomeExactServlets && entry.getKey().equals(welcome_in_context))))
welcome_servlet=welcome_in_context;
}
}
return welcome_servlet;
}
/* ------------------------------------------------------------ */
/* Check modification date headers.
*/
protected boolean passConditionalHeaders(HttpServletRequest request,HttpServletResponse response, HttpContent content)
throws IOException
{
try
{
String ifm=null;
String ifnm=null;
String ifms=null;
long ifums=-1;
if (request instanceof Request)
{
// Find multiple fields by iteration as an optimization
HttpFields fields = ((Request)request).getHttpFields();
for (int i=fields.size();i-->0;)
{
HttpField field=fields.getField(i);
if (field.getHeader() != null)
{
switch (field.getHeader())
{
case IF_MATCH:
ifm=field.getValue();
break;
case IF_NONE_MATCH:
ifnm=field.getValue();
break;
case IF_MODIFIED_SINCE:
ifms=field.getValue();
break;
case IF_UNMODIFIED_SINCE:
ifums=DateParser.parseDate(field.getValue());
break;
default:
}
}
}
}
else
{
ifm=request.getHeader(HttpHeader.IF_MATCH.asString());
ifnm=request.getHeader(HttpHeader.IF_NONE_MATCH.asString());
ifms=request.getHeader(HttpHeader.IF_MODIFIED_SINCE.asString());
ifums=request.getDateHeader(HttpHeader.IF_UNMODIFIED_SINCE.asString());
}
if (!HttpMethod.HEAD.is(request.getMethod()))
{
if (_etags)
{
String etag=content.getETagValue();
if (ifm!=null)
{
boolean match=false;
if (etag!=null)
{
QuotedCSV quoted = new QuotedCSV(true,ifm);
for (String tag : quoted)
{
if (etag.equals(tag) || tag.endsWith(ETAG_GZIP_QUOTE) && etag.equals(removeGzipFromETag(tag)))
{
match=true;
break;
}
}
}
if (!match)
{
response.setStatus(HttpServletResponse.SC_PRECONDITION_FAILED);
return false;
}
}
if (ifnm!=null && etag!=null)
{
// Handle special case of exact match OR gzip exact match
if (etag.equals(ifnm) || ifnm.endsWith(ETAG_GZIP_QUOTE) && ifnm.indexOf(',')<0 && etag.equals(removeGzipFromETag(etag)))
{
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
response.setHeader(HttpHeader.ETAG.asString(),ifnm);
return false;
}
// Handle list of tags
QuotedCSV quoted = new QuotedCSV(true,ifnm);
for (String tag : quoted)
{
if (etag.equals(tag) || tag.endsWith(ETAG_GZIP_QUOTE) && etag.equals(removeGzipFromETag(tag)))
{
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
response.setHeader(HttpHeader.ETAG.asString(),tag);
return false;
}
}
// If etag requires content to be served, then do not check if-modified-since
return true;
}
}
// Handle if modified since
if (ifms!=null)
{
//Get jetty's Response impl
String mdlm=content.getLastModifiedValue();
if (mdlm!=null && ifms.equals(mdlm))
{
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
if (_etags)
response.setHeader(HttpHeader.ETAG.asString(),content.getETagValue());
response.flushBuffer();
return false;
}
long ifmsl=request.getDateHeader(HttpHeader.IF_MODIFIED_SINCE.asString());
if (ifmsl!=-1 && content.getResource().lastModified()/1000 <= ifmsl/1000)
{
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
if (_etags)
response.setHeader(HttpHeader.ETAG.asString(),content.getETagValue());
response.flushBuffer();
return false;
}
}
// Parse the if[un]modified dates and compare to resource
if (ifums!=-1 && content.getResource().lastModified()/1000 > ifums/1000)
{
response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
return false;
}
}
}
catch(IllegalArgumentException iae)
{
if(!response.isCommitted())
response.sendError(400, iae.getMessage());
throw iae;
}
return true;
}
/* ------------------------------------------------------------------- */
protected void sendDirectory(HttpServletRequest request,
HttpServletResponse response,
Resource resource,
String pathInContext)
throws IOException
{
if (!_dirAllowed)
{
response.sendError(HttpServletResponse.SC_FORBIDDEN);
return;
}
byte[] data=null;
String base = URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH);
//If the DefaultServlet has a resource base set, use it
if (_resourceBase != null)
{
// handle ResourceCollection
if (_resourceBase instanceof ResourceCollection)
resource=_resourceBase.addPath(pathInContext);
}
//Otherwise, try using the resource base of its enclosing context handler
else if (_contextHandler.getBaseResource() instanceof ResourceCollection)
resource=_contextHandler.getBaseResource().addPath(pathInContext);
String dir = resource.getListHTML(base,pathInContext.length()>1);
if (dir==null)
{
response.sendError(HttpServletResponse.SC_FORBIDDEN,
"No directory");
return;
}
data=dir.getBytes("utf-8");
response.setContentType("text/html;charset=utf-8");
response.setContentLength(data.length);
response.getOutputStream().write(data);
}
/* ------------------------------------------------------------ */
protected boolean sendData(HttpServletRequest request,
HttpServletResponse response,
boolean include,
final HttpContent content,
Enumeration reqRanges)
throws IOException
{
final long content_length = content.getContentLengthValue();
// Get the output stream (or writer)
OutputStream out =null;
boolean written;
try
{
out = response.getOutputStream();
// has something already written to the response?
written = out instanceof HttpOutput
? ((HttpOutput)out).isWritten()
: true;
}
catch(IllegalStateException e)
{
out = new WriterOutputStream(response.getWriter());
written=true; // there may be data in writer buffer, so assume written
}
if (LOG.isDebugEnabled())
LOG.debug(String.format("sendData content=%s out=%s async=%b",content,out,request.isAsyncSupported()));
if ( reqRanges == null || !reqRanges.hasMoreElements() || content_length<0)
{
// if there were no ranges, send entire entity
if (include)
{
// write without headers
content.getResource().writeTo(out,0,content_length);
}
// else if we can't do a bypass write because of wrapping
else if (written || !(out instanceof HttpOutput))
{
// write normally
putHeaders(response,content,written?-1:0);
ByteBuffer buffer = content.getIndirectBuffer();
if (buffer!=null)
BufferUtil.writeTo(buffer,out);
else
content.getResource().writeTo(out,0,content_length);
}
// else do a bypass write
else
{
// write the headers
putHeaders(response,content,0);
// write the content asynchronously if supported
if (request.isAsyncSupported())
{
final AsyncContext context = request.startAsync();
context.setTimeout(0);
((HttpOutput)out).sendContent(content,new Callback()
{
@Override
public void succeeded()
{
context.complete();
content.release();
}
@Override
public void failed(Throwable x)
{
if (x instanceof IOException)
LOG.debug(x);
else
LOG.warn(x);
context.complete();
content.release();
}
@Override
public String toString()
{
return String.format("DefaultServlet@%x$CB", DefaultServlet.this.hashCode());
}
});
return false;
}
// otherwise write content blocking
((HttpOutput)out).sendContent(content);
}
}
else
{
// Parse the satisfiable ranges
List ranges =InclusiveByteRange.satisfiableRanges(reqRanges,content_length);
// if there are no satisfiable ranges, send 416 response
if (ranges==null || ranges.size()==0)
{
putHeaders(response,content,0);
response.setStatus(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
response.setHeader(HttpHeader.CONTENT_RANGE.asString(),
InclusiveByteRange.to416HeaderRangeString(content_length));
content.getResource().writeTo(out,0,content_length);
return true;
}
// if there is only a single valid range (must be satisfiable
// since were here now), send that range with a 216 response
if ( ranges.size()== 1)
{
InclusiveByteRange singleSatisfiableRange = ranges.get(0);
long singleLength = singleSatisfiableRange.getSize(content_length);
putHeaders(response,content,singleLength);
response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
if (!response.containsHeader(HttpHeader.DATE.asString()))
response.addDateHeader(HttpHeader.DATE.asString(),System.currentTimeMillis());
response.setHeader(HttpHeader.CONTENT_RANGE.asString(),
singleSatisfiableRange.toHeaderRangeString(content_length));
content.getResource().writeTo(out,singleSatisfiableRange.getFirst(content_length),singleLength);
return true;
}
// multiple non-overlapping valid ranges cause a multipart
// 216 response which does not require an overall
// content-length header
//
putHeaders(response,content,-1);
String mimetype=(content==null?null:content.getContentTypeValue());
if (mimetype==null)
LOG.warn("Unknown mimetype for "+request.getRequestURI());
MultiPartOutputStream multi = new MultiPartOutputStream(out);
response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
if (!response.containsHeader(HttpHeader.DATE.asString()))
response.addDateHeader(HttpHeader.DATE.asString(),System.currentTimeMillis());
// If the request has a "Request-Range" header then we need to
// send an old style multipart/x-byteranges Content-Type. This
// keeps Netscape and acrobat happy. This is what Apache does.
String ctp;
if (request.getHeader(HttpHeader.REQUEST_RANGE.asString())!=null)
ctp = "multipart/x-byteranges; boundary=";
else
ctp = "multipart/byteranges; boundary=";
response.setContentType(ctp+multi.getBoundary());
InputStream in=content.getResource().getInputStream();
long pos=0;
// calculate the content-length
int length=0;
String[] header = new String[ranges.size()];
for (int i=0;i0)?2:0)+
2+multi.getBoundary().length()+2+
(mimetype==null?0:HttpHeader.CONTENT_TYPE.asString().length()+2+mimetype.length())+2+
HttpHeader.CONTENT_RANGE.asString().length()+2+header[i].length()+2+
2+
(ibr.getLast(content_length)-ibr.getFirst(content_length))+1;
}
length+=2+2+multi.getBoundary().length()+2+2;
response.setContentLength(length);
for (int i=0;i © 2015 - 2025 Weber Informatics LLC | Privacy Policy