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The core jetty server artifact.
//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.server;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.nio.file.InvalidPathException;
import java.util.Collection;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Supplier;
import jakarta.servlet.AsyncContext;
import jakarta.servlet.RequestDispatcher;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.CompressedContentFormat;
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.PreEncodedHttpField;
import org.eclipse.jetty.http.QuotedCSV;
import org.eclipse.jetty.http.QuotedQualityCSV;
import org.eclipse.jetty.io.WriterOutputStream;
import org.eclipse.jetty.server.resource.HttpContentRangeWriter;
import org.eclipse.jetty.server.resource.InputStreamRangeWriter;
import org.eclipse.jetty.server.resource.RangeWriter;
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.resource.Resource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static java.util.Arrays.stream;
import static java.util.Collections.emptyList;
import static org.eclipse.jetty.http.HttpHeaderValue.IDENTITY;
/**
* Abstract resource service, used by DefaultServlet and ResourceHandler
*/
public class ResourceService
{
private static final Logger LOG = LoggerFactory.getLogger(ResourceService.class);
private static final PreEncodedHttpField ACCEPT_RANGES = new PreEncodedHttpField(HttpHeader.ACCEPT_RANGES, "bytes");
private HttpContent.ContentFactory _contentFactory;
private WelcomeFactory _welcomeFactory;
private boolean _acceptRanges = true;
private boolean _dirAllowed = true;
private boolean _redirectWelcome = false;
private CompressedContentFormat[] _precompressedFormats = new CompressedContentFormat[0];
private String[] _preferredEncodingOrder = new String[0];
private final Map> _preferredEncodingOrderCache = new ConcurrentHashMap<>();
private int _encodingCacheSize = 100;
private boolean _pathInfoOnly = false;
private boolean _etags = false;
private HttpField _cacheControl;
private List _gzipEquivalentFileExtensions;
public HttpContent.ContentFactory getContentFactory()
{
return _contentFactory;
}
public void setContentFactory(HttpContent.ContentFactory contentFactory)
{
_contentFactory = contentFactory;
}
public WelcomeFactory getWelcomeFactory()
{
return _welcomeFactory;
}
public void setWelcomeFactory(WelcomeFactory welcomeFactory)
{
_welcomeFactory = welcomeFactory;
}
public boolean isAcceptRanges()
{
return _acceptRanges;
}
public void setAcceptRanges(boolean acceptRanges)
{
_acceptRanges = acceptRanges;
}
public boolean isDirAllowed()
{
return _dirAllowed;
}
public void setDirAllowed(boolean dirAllowed)
{
_dirAllowed = dirAllowed;
}
public boolean isRedirectWelcome()
{
return _redirectWelcome;
}
public void setRedirectWelcome(boolean redirectWelcome)
{
_redirectWelcome = redirectWelcome;
}
public CompressedContentFormat[] getPrecompressedFormats()
{
return _precompressedFormats;
}
public void setPrecompressedFormats(CompressedContentFormat[] precompressedFormats)
{
_precompressedFormats = precompressedFormats;
_preferredEncodingOrder = stream(_precompressedFormats).map(f -> f.getEncoding()).toArray(String[]::new);
}
public void setEncodingCacheSize(int encodingCacheSize)
{
_encodingCacheSize = encodingCacheSize;
}
public int getEncodingCacheSize()
{
return _encodingCacheSize;
}
public boolean isPathInfoOnly()
{
return _pathInfoOnly;
}
public void setPathInfoOnly(boolean pathInfoOnly)
{
_pathInfoOnly = pathInfoOnly;
}
public boolean isEtags()
{
return _etags;
}
public void setEtags(boolean etags)
{
_etags = etags;
}
public HttpField getCacheControl()
{
return _cacheControl;
}
public void setCacheControl(HttpField cacheControl)
{
if (cacheControl == null)
_cacheControl = null;
if (cacheControl.getHeader() != HttpHeader.CACHE_CONTROL)
throw new IllegalArgumentException("!Cache-Control");
_cacheControl = cacheControl instanceof PreEncodedHttpField
? cacheControl
: new PreEncodedHttpField(cacheControl.getHeader(), cacheControl.getValue());
}
public List getGzipEquivalentFileExtensions()
{
return _gzipEquivalentFileExtensions;
}
public void setGzipEquivalentFileExtensions(List gzipEquivalentFileExtensions)
{
_gzipEquivalentFileExtensions = gzipEquivalentFileExtensions;
}
public boolean 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 = _pathInfoOnly ? "/" : (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 ? (_pathInfoOnly ? "" : servletPath) : pathInfo).endsWith(URIUtil.SLASH);
boolean checkPrecompressedVariants = _precompressedFormats.length > 0 && !endsWithSlash && !included && reqRanges == null;
HttpContent content = null;
boolean releaseContent = true;
try
{
// Find the content
content = _contentFactory.getContent(pathInContext, response.getBufferSize());
if (LOG.isDebugEnabled())
LOG.debug("content={}", content);
// Not found?
if (content == null || !content.getResource().exists())
{
if (included)
throw new FileNotFoundException("!" + pathInContext);
notFound(request, response);
return response.isCommitted();
}
// Directory?
if (content.getResource().isDirectory())
{
sendWelcome(content, pathInContext, endsWithSlash, included, request, response);
return true;
}
// Strip slash?
if (!included && 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(request.getContextPath(), pathInContext)));
return true;
}
// Conditional response?
if (!included && !passConditionalHeaders(request, response, content))
return true;
// Precompressed variant available?
Map precompressedContents = checkPrecompressedVariants ? content.getPrecompressedContents() : null;
if (precompressedContents != null && precompressedContents.size() > 0)
{
// Tell caches that response may vary by accept-encoding
response.addHeader(HttpHeader.VARY.asString(), HttpHeader.ACCEPT_ENCODING.asString());
List preferredEncodings = getPreferredEncodingOrder(request);
CompressedContentFormat precompressedContentEncoding = getBestPrecompressedContent(preferredEncodings, precompressedContents.keySet());
if (precompressedContentEncoding != null)
{
HttpContent precompressedContent = precompressedContents.get(precompressedContentEncoding);
if (LOG.isDebugEnabled())
LOG.debug("precompressed={}", precompressedContent);
content = precompressedContent;
response.setHeader(HttpHeader.CONTENT_ENCODING.asString(), precompressedContentEncoding.getEncoding());
}
}
// TODO this should be done by HttpContent#getContentEncoding
if (isGzippedContent(pathInContext))
response.setHeader(HttpHeader.CONTENT_ENCODING.asString(), "gzip");
// Send the data
releaseContent = sendData(request, response, included, content, reqRanges);
}
// Can be thrown from contentFactory.getContent() call when using invalid characters
catch (InvalidPathException e)
{
if (LOG.isDebugEnabled())
LOG.debug("InvalidPathException for pathInContext: {}", pathInContext, e);
if (included)
throw new FileNotFoundException("!" + pathInContext);
notFound(request, response);
return response.isCommitted();
}
catch (IllegalArgumentException e)
{
LOG.warn("Failed to serve resource: {}", pathInContext, e);
if (!response.isCommitted())
response.sendError(500, e.getMessage());
}
finally
{
if (releaseContent)
{
if (content != null)
content.release();
}
}
return true;
}
private List getPreferredEncodingOrder(HttpServletRequest request)
{
Enumeration headers = request.getHeaders(HttpHeader.ACCEPT_ENCODING.asString());
if (!headers.hasMoreElements())
return emptyList();
String key = headers.nextElement();
if (headers.hasMoreElements())
{
StringBuilder sb = new StringBuilder(key.length() * 2);
sb.append(key);
do
{
sb.append(',').append(headers.nextElement());
}
while (headers.hasMoreElements());
key = sb.toString();
}
List values = _preferredEncodingOrderCache.get(key);
if (values == null)
{
QuotedQualityCSV encodingQualityCSV = new QuotedQualityCSV(_preferredEncodingOrder);
encodingQualityCSV.addValue(key);
values = encodingQualityCSV.getValues();
// keep cache size in check even if we get strange/malicious input
if (_preferredEncodingOrderCache.size() > _encodingCacheSize)
_preferredEncodingOrderCache.clear();
_preferredEncodingOrderCache.put(key, values);
}
return values;
}
private CompressedContentFormat getBestPrecompressedContent(List preferredEncodings, Collection availableFormats)
{
if (availableFormats.isEmpty())
return null;
for (String encoding : preferredEncodings)
{
for (CompressedContentFormat format : availableFormats)
{
if (format.getEncoding().equals(encoding))
return format;
}
if ("*".equals(encoding))
return availableFormats.iterator().next();
if (IDENTITY.asString().equals(encoding))
return null;
}
return null;
}
protected void sendWelcome(HttpContent content, String pathInContext, boolean endsWithSlash, boolean included, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
// Redirect to directory
if (!endsWithSlash)
{
StringBuilder buf = new StringBuilder(request.getRequestURI());
int param = buf.lastIndexOf(";");
if (param < 0 || buf.lastIndexOf("/", 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 = _welcomeFactory == null ? null : _welcomeFactory.getWelcomeFile(pathInContext);
if (welcome != null)
{
String servletPath = included ? (String)request.getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH)
: request.getServletPath();
if (_pathInfoOnly)
welcome = URIUtil.addPaths(servletPath, welcome);
if (LOG.isDebugEnabled())
LOG.debug("welcome={}", welcome);
ServletContext context = request.getServletContext();
if (_redirectWelcome || context == null)
{
// Redirect to the index
response.setContentLength(0);
String uri = URIUtil.encodePath(URIUtil.addPaths(request.getContextPath(), welcome));
String q = request.getQueryString();
if (q != null && !q.isEmpty())
uri += "?" + q;
response.sendRedirect(response.encodeRedirectURL(uri));
return;
}
RequestDispatcher dispatcher = context.getRequestDispatcher(URIUtil.encodePath(welcome));
if (dispatcher != null)
{
// Forward to the index
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 || _gzipEquivalentFileExtensions == 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());
}
protected void notFound(HttpServletRequest request, HttpServletResponse response) throws IOException
{
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
protected void sendStatus(HttpServletResponse response, int status, Supplier etag) throws IOException
{
response.setStatus(status);
if (_etags && etag != null)
response.setHeader(HttpHeader.ETAG.asString(), etag.get());
response.flushBuffer();
}
/* 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
for (HttpField field : ((Request)request).getHttpFields())
{
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 (_etags)
{
String etag = content.getETagValue();
if (ifm != null)
{
boolean match = false;
if (etag != null)
{
QuotedCSV quoted = new QuotedCSV(true, ifm);
for (String etagWithSuffix : quoted)
{
if (CompressedContentFormat.tagEquals(etag, etagWithSuffix))
{
match = true;
break;
}
}
}
if (!match)
{
sendStatus(response, HttpServletResponse.SC_PRECONDITION_FAILED, null);
return false;
}
}
if (ifnm != null && etag != null)
{
// Handle special case of exact match OR gzip exact match
if (CompressedContentFormat.tagEquals(etag, ifnm) && ifnm.indexOf(',') < 0)
{
sendStatus(response, HttpServletResponse.SC_NOT_MODIFIED, ifnm::toString);
return false;
}
// Handle list of tags
QuotedCSV quoted = new QuotedCSV(true, ifnm);
for (String tag : quoted)
{
if (CompressedContentFormat.tagEquals(etag, tag))
{
sendStatus(response, HttpServletResponse.SC_NOT_MODIFIED, tag::toString);
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 (ifms.equals(mdlm))
{
sendStatus(response, HttpServletResponse.SC_NOT_MODIFIED, content::getETagValue);
return false;
}
long ifmsl = request.getDateHeader(HttpHeader.IF_MODIFIED_SINCE.asString());
if (ifmsl != -1 && content.getResource().lastModified() / 1000 <= ifmsl / 1000)
{
sendStatus(response, HttpServletResponse.SC_NOT_MODIFIED, content::getETagValue);
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.addEncodedPaths(request.getRequestURI(), URIUtil.SLASH);
String dir = resource.getListHTML(base, pathInContext.length() > 1, request.getQueryString());
if (dir == null)
{
response.sendError(HttpServletResponse.SC_FORBIDDEN,
"No directory");
return;
}
data = dir.getBytes(StandardCharsets.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;
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
writeContent(content, out, 0, content_length);
}
// else if we can't do a bypass write because of wrapping
else if (written)
{
// write normally
putHeaders(response, content, Response.NO_CONTENT_LENGTH);
writeContent(content, out, 0, content_length);
}
// else do a bypass write
else
{
// write the headers
putHeaders(response, content, Response.USE_KNOWN_CONTENT_LENGTH);
// 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)
{
String msg = "Failed to send content";
if (x instanceof IOException)
LOG.debug(msg, x);
else
LOG.warn(msg, x);
context.complete();
content.release();
}
@Override
public InvocationType getInvocationType()
{
return InvocationType.NON_BLOCKING;
}
@Override
public String toString()
{
return String.format("ResourceService@%x$CB", ResourceService.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, Response.USE_KNOWN_CONTENT_LENGTH);
response.setHeader(HttpHeader.CONTENT_RANGE.asString(),
InclusiveByteRange.to416HeaderRangeString(content_length));
sendStatus(response, HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE, null);
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.iterator().next();
long singleLength = singleSatisfiableRange.getSize();
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));
writeContent(content, out, singleSatisfiableRange.getFirst(), 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, Response.NO_CONTENT_LENGTH);
String mimetype = content.getContentTypeValue();
if (mimetype == null)
LOG.warn("Unknown mimetype for {}", request.getRequestURI());
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=";
MultiPartOutputStream multi = new MultiPartOutputStream(out);
response.setContentType(ctp + multi.getBoundary());
// calculate the content-length
int length = 0;
String[] header = new String[ranges.size()];
int i = 0;
final int CRLF = "\r\n".length();
final int DASHDASH = "--".length();
final int BOUNDARY = multi.getBoundary().length();
final int FIELD_SEP = ": ".length();
for (InclusiveByteRange ibr : ranges)
{
header[i] = ibr.toHeaderRangeString(content_length);
if (i > 0) // in-part
length += CRLF;
length += DASHDASH + BOUNDARY + CRLF;
if (mimetype != null)
length += HttpHeader.CONTENT_TYPE.asString().length() + FIELD_SEP + mimetype.length() + CRLF;
length += HttpHeader.CONTENT_RANGE.asString().length() + FIELD_SEP + header[i].length() + CRLF;
length += CRLF;
length += ibr.getSize();
i++;
}
length += CRLF + DASHDASH + BOUNDARY + DASHDASH + CRLF;
response.setContentLength(length);
try (RangeWriter rangeWriter = HttpContentRangeWriter.newRangeWriter(content))
{
i = 0;
for (InclusiveByteRange ibr : ranges)
{
multi.startPart(mimetype, new String[]{HttpHeader.CONTENT_RANGE + ": " + header[i]});
rangeWriter.writeTo(multi, ibr.getFirst(), ibr.getSize());
i++;
}
}
multi.close();
}
return true;
}
private static void writeContent(HttpContent content, OutputStream out, long start, long contentLength) throws IOException
{
// Is the write for the whole content?
if (start == 0 && content.getResource().length() == contentLength)
{
// attempt efficient ByteBuffer based write for whole content
ByteBuffer buffer = content.getIndirectBuffer();
if (buffer != null)
{
BufferUtil.writeTo(buffer, out);
return;
}
try (InputStream input = content.getResource().getInputStream())
{
IO.copy(input, out);
return;
}
}
// Use a ranged writer
try (InputStreamRangeWriter rangeWriter = new InputStreamRangeWriter(() -> content.getInputStream()))
{
rangeWriter.writeTo(out, start, contentLength);
}
}
protected void putHeaders(HttpServletResponse response, HttpContent content, long contentLength)
{
if (response instanceof Response)
{
Response r = (Response)response;
r.putHeaders(content, contentLength, _etags);
HttpFields.Mutable fields = r.getHttpFields();
if (_acceptRanges && !fields.contains(HttpHeader.ACCEPT_RANGES))
fields.add(ACCEPT_RANGES);
if (_cacheControl != null && !fields.contains(HttpHeader.CACHE_CONTROL))
fields.add(_cacheControl);
}
else
{
Response.putHeaders(response, content, contentLength, _etags);
if (_acceptRanges && !response.containsHeader(HttpHeader.ACCEPT_RANGES.asString()))
response.setHeader(ACCEPT_RANGES.getName(), ACCEPT_RANGES.getValue());
if (_cacheControl != null && !response.containsHeader(HttpHeader.CACHE_CONTROL.asString()))
response.setHeader(_cacheControl.getName(), _cacheControl.getValue());
}
}
public interface WelcomeFactory
{
/**
* Finds a matching welcome file for the supplied {@link Resource}.
*
* @param pathInContext the path of the request
* @return The path of the matching welcome file in context or null.
*/
String getWelcomeFile(String pathInContext) throws IOException;
}
}