/
Response.java
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/
Response.java
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//
// ========================================================================
// 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.IOException;
import java.io.PrintWriter;
import java.nio.channels.IllegalSelectorException;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Iterator;
import java.util.ListIterator;
import java.util.Locale;
import java.util.Map;
import java.util.function.Supplier;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;
import javax.servlet.ServletResponseWrapper;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import javax.servlet.http.HttpSession;
import org.eclipse.jetty.http.CookieCompliance;
import org.eclipse.jetty.http.DateGenerator;
import org.eclipse.jetty.http.HttpContent;
import org.eclipse.jetty.http.HttpCookie;
import org.eclipse.jetty.http.HttpCookie.SameSite;
import org.eclipse.jetty.http.HttpCookie.SetCookieHttpField;
import org.eclipse.jetty.http.HttpField;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpGenerator;
import org.eclipse.jetty.http.HttpHeader;
import org.eclipse.jetty.http.HttpHeaderValue;
import org.eclipse.jetty.http.HttpScheme;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.http.HttpURI;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.http.MetaData;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.http.PreEncodedHttpField;
import org.eclipse.jetty.io.RuntimeIOException;
import org.eclipse.jetty.server.handler.ContextHandler.Context;
import org.eclipse.jetty.server.session.SessionHandler;
import org.eclipse.jetty.util.AtomicBiInteger;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.URIUtil;
/**
* <p>{@link Response} provides the implementation for {@link HttpServletResponse}.</p>
*/
public class Response implements HttpServletResponse
{
private static final int __MIN_BUFFER_SIZE = 1;
private static final HttpField __EXPIRES_01JAN1970 = new PreEncodedHttpField(HttpHeader.EXPIRES, DateGenerator.__01Jan1970);
public static final int NO_CONTENT_LENGTH = -1;
public static final int USE_KNOWN_CONTENT_LENGTH = -2;
public enum OutputType
{
NONE, STREAM, WRITER
}
/**
* If a header name starts with this string, the header (stripped of the prefix)
* can be set during include using only {@link #setHeader(String, String)} or
* {@link #addHeader(String, String)}.
*/
public static final String SET_INCLUDE_HEADER_PREFIX = "org.eclipse.jetty.server.include.";
private final HttpChannel _channel;
private final HttpFields.Mutable _fields = HttpFields.build();
private final AtomicBiInteger _errorSentAndIncludes = new AtomicBiInteger(); // hi is errorSent flag, lo is include count
private final HttpOutput _out;
private int _status = HttpStatus.OK_200;
private String _reason;
private Locale _locale;
private MimeTypes.Type _mimeType;
private String _characterEncoding;
private EncodingFrom _encodingFrom = EncodingFrom.NOT_SET;
private String _contentType;
private OutputType _outputType = OutputType.NONE;
private ResponseWriter _writer;
private long _contentLength = -1;
private Supplier<HttpFields> _trailers;
private enum EncodingFrom
{
/**
* Character encoding was not set, or the encoding was cleared with {@code setCharacterEncoding(null)}.
*/
NOT_SET,
/**
* Using the default character encoding from the context otherwise iso-8859-1.
*/
DEFAULT,
/**
* Character encoding was inferred from the Content-Type and will be added as a parameter to the Content-Type.
*/
INFERRED,
/**
* The default character encoding of the locale was used after a call to {@link #setLocale(Locale)}.
*/
SET_LOCALE,
/**
* The character encoding has been explicitly set using the Content-Type charset parameter with {@link #setContentType(String)}.
*/
SET_CONTENT_TYPE,
/**
* The character encoding has been explicitly set using {@link #setCharacterEncoding(String)}.
*/
SET_CHARACTER_ENCODING
}
private static final EnumSet<EncodingFrom> __localeOverride = EnumSet.of(EncodingFrom.NOT_SET, EncodingFrom.DEFAULT, EncodingFrom.INFERRED, EncodingFrom.SET_LOCALE);
private static final EnumSet<EncodingFrom> __explicitCharset = EnumSet.of(EncodingFrom.SET_LOCALE, EncodingFrom.SET_CHARACTER_ENCODING, EncodingFrom.SET_CONTENT_TYPE);
public Response(HttpChannel channel, HttpOutput out)
{
_channel = channel;
_out = out;
}
public HttpChannel getHttpChannel()
{
return _channel;
}
protected void recycle()
{
// _channel need not be recycled
_fields.clear();
_errorSentAndIncludes.set(0);
_out.recycle();
_status = HttpStatus.OK_200;
_reason = null;
_locale = null;
_mimeType = null;
_characterEncoding = null;
_encodingFrom = EncodingFrom.NOT_SET;
_contentType = null;
_outputType = OutputType.NONE;
// _writer does not need to be recycled
_contentLength = -1;
_trailers = null;
}
public HttpOutput getHttpOutput()
{
return _out;
}
public void reopen()
{
// Make the response mutable and reopen output.
setErrorSent(false);
_out.reopen();
}
public void errorClose()
{
// Make the response immutable and soft close the output.
setErrorSent(true);
_out.softClose();
}
/**
* @return true if the response is mutable, ie not errorSent and not included
*/
private boolean isMutable()
{
return _errorSentAndIncludes.get() == 0;
}
private void setErrorSent(boolean errorSent)
{
_errorSentAndIncludes.getAndSetHi(errorSent ? 1 : 0);
}
public boolean isIncluding()
{
return _errorSentAndIncludes.getLo() > 0;
}
public void include()
{
_errorSentAndIncludes.add(0, 1);
}
public void included()
{
_errorSentAndIncludes.add(0, -1);
if (_outputType == OutputType.WRITER)
{
_writer.reopen();
}
_out.reopen();
}
public void addCookie(HttpCookie cookie)
{
if (StringUtil.isBlank(cookie.getName()))
throw new IllegalArgumentException("Cookie.name cannot be blank/null");
// add the set cookie
_fields.add(new SetCookieHttpField(checkSameSite(cookie), getHttpChannel().getHttpConfiguration().getResponseCookieCompliance()));
// Expire responses with set-cookie headers so they do not get cached.
_fields.put(__EXPIRES_01JAN1970);
}
/**
* Check that samesite is set on the cookie. If not, use a
* context default value, if one has been set.
*
* @param cookie the cookie to check
* @return either the original cookie, or a new one that has the samesit default set
*/
private HttpCookie checkSameSite(HttpCookie cookie)
{
if (cookie == null || cookie.getSameSite() != null)
return cookie;
//sameSite is not set, use the default configured for the context, if one exists
SameSite contextDefault = HttpCookie.getSameSiteDefault(_channel.getRequest().getContext());
if (contextDefault == null)
return cookie; //no default set
return new HttpCookie(cookie.getName(),
cookie.getValue(),
cookie.getDomain(),
cookie.getPath(),
cookie.getMaxAge(),
cookie.isHttpOnly(),
cookie.isSecure(),
cookie.getComment(),
cookie.getVersion(),
contextDefault);
}
@Override
public void addCookie(Cookie cookie)
{
//Servlet Spec 9.3 Include method: cannot set a cookie if handling an include
if (isMutable())
{
if (StringUtil.isBlank(cookie.getName()))
throw new IllegalArgumentException("Cookie.name cannot be blank/null");
String comment = cookie.getComment();
// HttpOnly was supported as a comment in cookie flags before the java.net.HttpCookie implementation so need to check that
boolean httpOnly = cookie.isHttpOnly() || HttpCookie.isHttpOnlyInComment(comment);
SameSite sameSite = HttpCookie.getSameSiteFromComment(comment);
comment = HttpCookie.getCommentWithoutAttributes(comment);
addCookie(new HttpCookie(
cookie.getName(),
cookie.getValue(),
cookie.getDomain(),
cookie.getPath(),
cookie.getMaxAge(),
httpOnly,
cookie.getSecure(),
comment,
cookie.getVersion(),
sameSite));
}
}
/**
* Replace (or add) a cookie.
* Using name, path and domain, look for a matching set-cookie header and replace it.
*
* @param cookie The cookie to add/replace
*/
public void replaceCookie(HttpCookie cookie)
{
for (ListIterator<HttpField> i = _fields.listIterator(); i.hasNext(); )
{
HttpField field = i.next();
if (field.getHeader() == HttpHeader.SET_COOKIE)
{
CookieCompliance compliance = getHttpChannel().getHttpConfiguration().getResponseCookieCompliance();
HttpCookie oldCookie;
if (field instanceof SetCookieHttpField)
oldCookie = ((SetCookieHttpField)field).getHttpCookie();
else
oldCookie = new HttpCookie(field.getValue());
if (!cookie.getName().equals(oldCookie.getName()))
continue;
if (cookie.getDomain() == null)
{
if (oldCookie.getDomain() != null)
continue;
}
else if (!cookie.getDomain().equalsIgnoreCase(oldCookie.getDomain()))
continue;
if (cookie.getPath() == null)
{
if (oldCookie.getPath() != null)
continue;
}
else if (!cookie.getPath().equals(oldCookie.getPath()))
continue;
i.set(new SetCookieHttpField(checkSameSite(cookie), compliance));
return;
}
}
// Not replaced, so add normally
addCookie(cookie);
}
public boolean containsHeader(String name)
{
return _fields.contains(name);
}
@Override
public String encodeURL(String url)
{
if (url == null)
return null;
final Request request = _channel.getRequest();
SessionHandler sessionManager = request.getSessionHandler();
if (sessionManager == null)
return url;
HttpURI uri = null;
boolean hasScheme = URIUtil.hasScheme(url);
if (sessionManager.isCheckingRemoteSessionIdEncoding() && hasScheme)
{
uri = HttpURI.from(url);
String path = uri.getPath();
path = (path == null ? "" : path);
int port = uri.getPort();
if (port < 0)
port = HttpScheme.getDefaultPort(uri.getScheme());
// Is it the same server?
if (!request.getServerName().equalsIgnoreCase(uri.getHost()))
return url;
if (request.getServerPort() != port)
return url;
if (request.getContext() != null && !path.startsWith(request.getContextPath()))
return url;
}
String sessionURLPrefix = sessionManager.getSessionIdPathParameterNamePrefix();
if (sessionURLPrefix == null)
return url;
// should not encode if cookies in evidence
if ((sessionManager.isUsingCookies() && request.isRequestedSessionIdFromCookie()) || !sessionManager.isUsingURLs())
{
int prefix = url.indexOf(sessionURLPrefix);
if (prefix != -1)
{
int suffix = url.indexOf("?", prefix);
if (suffix < 0)
suffix = url.indexOf("#", prefix);
if (suffix <= prefix)
return url.substring(0, prefix);
return url.substring(0, prefix) + url.substring(suffix);
}
return url;
}
// get session;
HttpSession session = request.getSession(false);
// no session
if (session == null)
return url;
// invalid session
if (!sessionManager.isValid(session))
return url;
String id = sessionManager.getExtendedId(session);
// Already encoded
int prefix = url.indexOf(sessionURLPrefix);
if (prefix != -1)
{
int suffix = url.indexOf("?", prefix);
if (suffix < 0)
suffix = url.indexOf("#", prefix);
if (suffix <= prefix)
return url.substring(0, prefix + sessionURLPrefix.length()) + id;
return url.substring(0, prefix + sessionURLPrefix.length()) + id +
url.substring(suffix);
}
// check for a null path
String nonNullPath = "";
if (hasScheme)
{
if (uri == null)
uri = HttpURI.from(url);
if (uri.getPath() == null)
nonNullPath = "/";
}
// edit the session
int suffix = url.indexOf('?');
if (suffix < 0)
suffix = url.indexOf('#');
if (suffix < 0)
return url + nonNullPath + sessionURLPrefix + id;
return url.substring(0, suffix) + nonNullPath + sessionURLPrefix + id + url.substring(suffix);
}
@Override
public String encodeRedirectURL(String url)
{
return encodeURL(url);
}
@Override
@Deprecated(since = "Servlet API 2.1")
public String encodeUrl(String url)
{
return encodeURL(url);
}
@Override
@Deprecated(since = "Servlet API 2.1")
public String encodeRedirectUrl(String url)
{
return encodeRedirectURL(url);
}
@Override
public void sendError(int sc) throws IOException
{
sendError(sc, null);
}
/**
* Send an error response.
* <p>In addition to the servlet standard handling, this method supports some additional codes:</p>
* <dl>
* <dt>102</dt><dd>Send a partial PROCESSING response and allow additional responses</dd>
* <dt>103</dt><dd>Send a partial EARLY_HINT response as per <a href="https://datatracker.ietf.org/doc/html/rfc8297">RFC8297</a></dd>
* <dt>-1</dt><dd>Abort the HttpChannel and close the connection/stream</dd>
* </dl>
* @param code The error code
* @param message The message
* @throws IOException If an IO problem occurred sending the error response.
*/
@Override
public void sendError(int code, String message) throws IOException
{
if (isIncluding())
return;
switch (code)
{
case -1:
_channel.abort(new IOException(message));
break;
case HttpStatus.PROCESSING_102:
sendProcessing();
break;
case HttpStatus.EARLY_HINT_103:
sendEarlyHint();
break;
default:
_channel.getState().sendError(code, message);
break;
}
}
/**
* Sends a 102-Processing response.
* If the request had an Expect header starting with 102, then
* a 102 response is sent. This indicates that the request still be processed and real response
* can still be sent. This method is called by sendError if it is passed 102.
*
* @throws IOException if unable to send the 102 response
* @see javax.servlet.http.HttpServletResponse#sendError(int)
*/
public void sendProcessing() throws IOException
{
if (_channel.isExpecting102Processing() && !isCommitted())
{
_channel.sendResponse(HttpGenerator.PROGRESS_102_INFO, null, true);
}
}
/**
* Sends a 103 Early Hint response.
*
* Send a 103 response as per <a href="https://datatracker.ietf.org/doc/html/rfc8297">RFC8297</a>
* This method is called by sendError if it is passed 103.
*
* @throws IOException if unable to send the 103 response
* @see javax.servlet.http.HttpServletResponse#sendError(int)
*/
public void sendEarlyHint() throws IOException
{
if (!isCommitted())
_channel.sendResponse(new MetaData.Response(_channel.getRequest().getHttpVersion(), HttpStatus.EARLY_HINT_103,
_channel.getResponse()._fields.asImmutable()), null, true);
}
/**
* Sends a response with one of the 300 series redirection codes.
*
* @param code the redirect status code
* @param location the location to send in {@code Location} headers
* @throws IOException if unable to send the redirect
*/
public void sendRedirect(int code, String location) throws IOException
{
sendRedirect(code, location, false);
}
/**
* Sends a response with a HTTP version appropriate 30x redirection.
*
* @param location the location to send in {@code Location} headers
* @param consumeAll if True, consume any HTTP/1 request input before doing the redirection. If the input cannot
* be consumed without blocking, then add a `Connection: close` header to the response.
* @throws IOException if unable to send the redirect
*/
public void sendRedirect(String location, boolean consumeAll) throws IOException
{
sendRedirect(getHttpChannel().getRequest().getHttpVersion().getVersion() < HttpVersion.HTTP_1_1.getVersion()
? HttpServletResponse.SC_MOVED_TEMPORARILY : HttpServletResponse.SC_SEE_OTHER, location, consumeAll);
}
/**
* Sends a response with a given redirection code.
*
* @param code the redirect status code
* @param location the location to send in {@code Location} headers
* @param consumeAll if True, consume any HTTP/1 request input before doing the redirection. If the input cannot
* be consumed without blocking, then add a `Connection: close` header to the response.
* @throws IOException if unable to send the redirect
*/
public void sendRedirect(int code, String location, boolean consumeAll) throws IOException
{
if (consumeAll)
getHttpChannel().ensureConsumeAllOrNotPersistent();
if (!HttpStatus.isRedirection(code))
throw new IllegalArgumentException("Not a 3xx redirect code");
if (!isMutable())
return;
if (location == null)
throw new IllegalArgumentException();
if (!URIUtil.hasScheme(location))
{
StringBuilder buf = _channel.getHttpConfiguration().isRelativeRedirectAllowed()
? new StringBuilder()
: _channel.getRequest().getRootURL();
if (location.startsWith("/"))
{
// absolute in context
location = URIUtil.canonicalURI(location);
}
else
{
// relative to request
String path = _channel.getRequest().getRequestURI();
String parent = (path.endsWith("/")) ? path : URIUtil.parentPath(path);
location = URIUtil.canonicalURI(URIUtil.addEncodedPaths(parent, location));
if (location != null && !location.startsWith("/"))
buf.append('/');
}
if (location == null)
throw new IllegalStateException("path cannot be above root");
buf.append(location);
location = buf.toString();
}
resetBuffer();
setHeader(HttpHeader.LOCATION, location);
setStatus(code);
closeOutput();
}
@Override
public void sendRedirect(String location) throws IOException
{
sendRedirect(HttpServletResponse.SC_MOVED_TEMPORARILY, location);
}
@Override
public void setDateHeader(String name, long date)
{
if (isMutable())
{
HttpHeader header = HttpHeader.CACHE.get(name);
if (header == null)
_fields.putDateField(name, date);
else
_fields.putDateField(header, date);
}
}
@Override
public void addDateHeader(String name, long date)
{
if (isMutable())
_fields.addDateField(name, date);
}
public void setHeader(HttpHeader name, String value)
{
if (isMutable())
{
if (HttpHeader.CONTENT_TYPE == name)
setContentType(value);
else
{
_fields.put(name, value);
if (HttpHeader.CONTENT_LENGTH == name)
{
if (value == null)
_contentLength = -1L;
else
_contentLength = Long.parseLong(value);
}
}
}
}
@Override
public void setHeader(String name, String value)
{
long biInt = _errorSentAndIncludes.get();
if (biInt != 0)
{
boolean errorSent = AtomicBiInteger.getHi(biInt) != 0;
boolean including = AtomicBiInteger.getLo(biInt) > 0;
if (!errorSent && including && name.startsWith(SET_INCLUDE_HEADER_PREFIX))
name = name.substring(SET_INCLUDE_HEADER_PREFIX.length());
else
return;
}
if (HttpHeader.CONTENT_TYPE.is(name))
setContentType(value);
else
{
_fields.put(name, value);
if (HttpHeader.CONTENT_LENGTH.is(name))
{
if (value == null)
_contentLength = -1L;
else
_contentLength = Long.parseLong(value);
}
}
}
@Override
public Collection<String> getHeaderNames()
{
return _fields.getFieldNamesCollection();
}
@Override
public String getHeader(String name)
{
return _fields.get(name);
}
@Override
public Collection<String> getHeaders(String name)
{
Collection<String> i = _fields.getValuesList(name);
if (i == null)
return Collections.emptyList();
return i;
}
@Override
public void addHeader(String name, String value)
{
long biInt = _errorSentAndIncludes.get();
if (biInt != 0)
{
boolean errorSent = AtomicBiInteger.getHi(biInt) != 0;
boolean including = AtomicBiInteger.getLo(biInt) > 0;
if (!errorSent && including && name.startsWith(SET_INCLUDE_HEADER_PREFIX))
name = name.substring(SET_INCLUDE_HEADER_PREFIX.length());
else
return;
}
if (HttpHeader.CONTENT_TYPE.is(name))
{
setContentType(value);
return;
}
if (HttpHeader.CONTENT_LENGTH.is(name))
{
setHeader(name, value);
return;
}
_fields.add(name, value);
}
@Override
public void setIntHeader(String name, int value)
{
if (isMutable())
{
_fields.putLongField(name, value);
if (HttpHeader.CONTENT_LENGTH.is(name))
_contentLength = value;
}
}
@Override
public void addIntHeader(String name, int value)
{
if (isMutable())
{
_fields.add(name, Integer.toString(value));
if (HttpHeader.CONTENT_LENGTH.is(name))
_contentLength = value;
}
}
@Override
public void setStatus(int sc)
{
if (sc <= 0)
throw new IllegalArgumentException();
if (isMutable())
{
// Null the reason only if the status is different. This allows
// a specific reason to be sent with setStatusWithReason followed by sendError.
if (_status != sc)
_reason = null;
_status = sc;
}
}
@Override
@Deprecated(since = "Servlet API 2.1")
public void setStatus(int sc, String message)
{
setStatusWithReason(sc, null);
}
public void setStatusWithReason(int sc, String message)
{
if (sc <= 0)
throw new IllegalArgumentException();
if (isMutable())
{
_status = sc;
_reason = message;
}
}
@Override
public String getCharacterEncoding()
{
return getCharacterEncoding(false);
}
/**
* Private utility method to get the character encoding.
* A standard call to {@link #getCharacterEncoding()} should not change the Content-Type header.
* But when {@link #getWriter()} is called we must decide what Content-Type to use, so this will allow an inferred
* charset to be set in in the Content-Type.
* @param setContentType if true allow the Content-Type header to be changed if character encoding was inferred or the default encoding was used.
* @return the character encoding for this response.
*/
private String getCharacterEncoding(boolean setContentType)
{
// First try explicit char encoding.
if (_characterEncoding != null)
return _characterEncoding;
String encoding;
// Try charset from mime type.
if (_mimeType != null && _mimeType.isCharsetAssumed())
return _mimeType.getCharsetString();
// Try charset assumed from content type (assumed charsets are not added to content type header).
encoding = MimeTypes.getCharsetAssumedFromContentType(_contentType);
if (encoding != null)
return encoding;
// Try char set inferred from content type.
encoding = MimeTypes.getCharsetInferredFromContentType(_contentType);
if (encoding != null)
{
if (setContentType)
setCharacterEncoding(encoding, EncodingFrom.INFERRED);
return encoding;
}
// Try any default char encoding for the context.
Context context = _channel.getRequest().getContext();
if (context != null)
{
encoding = context.getResponseCharacterEncoding();
if (encoding != null)
{
if (setContentType)
setCharacterEncoding(encoding, EncodingFrom.DEFAULT);
return encoding;
}
}
// Fallback to last resort iso-8859-1.
encoding = StringUtil.__ISO_8859_1;
if (setContentType)
setCharacterEncoding(encoding, EncodingFrom.DEFAULT);
return encoding;
}
@Override
public String getContentType()
{
return _contentType;
}
@Override
public ServletOutputStream getOutputStream() throws IOException
{
if (_outputType == OutputType.WRITER)
throw new IllegalStateException("WRITER");
_outputType = OutputType.STREAM;
return _out;
}
public boolean isWriting()
{
return _outputType == OutputType.WRITER;
}
public boolean isStreaming()
{
return _outputType == OutputType.STREAM;
}
public boolean isWritingOrStreaming()
{
return isWriting() || isStreaming();
}
@Override
public PrintWriter getWriter() throws IOException
{
if (_outputType == OutputType.STREAM)
throw new IllegalStateException("STREAM");
if (_outputType == OutputType.NONE)
{
String encoding = getCharacterEncoding(true);
Locale locale = getLocale();
if (_writer != null && _writer.isFor(locale, encoding))
_writer.reopen();
else
{
if (StringUtil.__ISO_8859_1.equalsIgnoreCase(encoding))
_writer = new ResponseWriter(new Iso88591HttpWriter(_out), locale, encoding);
else if (StringUtil.__UTF8.equalsIgnoreCase(encoding))
_writer = new ResponseWriter(new Utf8HttpWriter(_out), locale, encoding);
else
_writer = new ResponseWriter(new EncodingHttpWriter(_out, encoding), locale, encoding);
}
// Set the output type at the end, because setCharacterEncoding() checks for it.
_outputType = OutputType.WRITER;
}
return _writer;
}
@Override
public void setContentLength(int len)
{
// Protect from setting after committed as default handling
// of a servlet HEAD request ALWAYS sets _content length, even
// if the getHandling committed the response!
if (isCommitted() || !isMutable())
return;
if (len > 0)
{
long written = _out.getWritten();
if (written > len)
throw new IllegalArgumentException("setContentLength(" + len + ") when already written " + written);
_contentLength = len;
_fields.putLongField(HttpHeader.CONTENT_LENGTH, len);
if (isAllContentWritten(written))
{
try
{
closeOutput();
}
catch (IOException e)
{
throw new RuntimeIOException(e);
}
}
}
else if (len == 0)
{
long written = _out.getWritten();
if (written > 0)
throw new IllegalArgumentException("setContentLength(0) when already written " + written);
_contentLength = len;
_fields.put(HttpHeader.CONTENT_LENGTH, "0");
}
else
{
_contentLength = len;
_fields.remove(HttpHeader.CONTENT_LENGTH);
}
}
public long getContentLength()
{
return _contentLength;
}
public boolean isAllContentWritten(long written)
{
return (_contentLength >= 0 && written >= _contentLength);
}
public boolean isContentComplete(long written)
{
return (_contentLength < 0 || written >= _contentLength);
}
public void closeOutput() throws IOException
{
if (_outputType == OutputType.WRITER)
_writer.close();
else
_out.close();
}
/**
* close the output
*
* @deprecated Use {@link #closeOutput()}
*/
@Deprecated
public void completeOutput() throws IOException
{
closeOutput();
}
public void completeOutput(Callback callback)
{
if (_outputType == OutputType.WRITER)
_writer.complete(callback);
else
_out.complete(callback);
}