/* Exception reporting policy method.
* @param e the Throwable to report.
*/
private void exception(Throwable e) {
try {
_persistent = false;
int error_code = HttpResponse.__500_Internal_Server_Error;
if (e instanceof HttpException) {
error_code = ((HttpException) e).getCode();
if (_request == null) log.warn(e.toString());
else log.warn(_request.getRequestLine() + " " + e.toString());
log.debug(LogSupport.EXCEPTION, e);
} else if (e instanceof EOFException) {
LogSupport.ignore(log, e);
return;
} else {
_request.setAttribute("javax.servlet.error.exception_type", e.getClass());
_request.setAttribute("javax.servlet.error.exception", e);
if (_request == null) log.warn(LogSupport.EXCEPTION, e);
else log.warn(_request.getRequestLine(), e);
}
if (_response != null && !_response.isCommitted()) {
_response.reset();
_response.removeField(HttpFields.__TransferEncoding);
_response.setField(HttpFields.__Connection, HttpFields.__Close);
_response.sendError(error_code);
}
} catch (Exception ex) {
LogSupport.ignore(log, ex);
}
}
/** Destroy the connection. called by handle when handleNext returns false. */
protected void destroy() {
try {
close();
} catch (IOException e) {
LogSupport.ignore(log, e);
} catch (Exception e) {
log.warn(LogSupport.EXCEPTION, e);
}
// Destroy request and response
if (_request != null) _request.destroy();
if (_response != null) _response.destroy();
if (_inputStream != null) _inputStream.destroy();
if (_outputStream != null) _outputStream.destroy();
_inputStream = null;
_outputStream = null;
_request = null;
_response = null;
_handlingThread = null;
if (_statsOn) {
_tmpTime = System.currentTimeMillis();
if (_reqTime > 0) _httpServer.statsEndRequest(_tmpTime - _reqTime, false);
_httpServer.statsCloseConnection(_tmpTime - _openTime, _requests);
}
}
/**
* Output Notifications. Trigger header and/or filters from output stream observations. Also
* finalizes method of indicating response content length. Called as a result of the connection
* subscribing for notifications to the HttpOutputStream.
*
* @see HttpOutputStream
* @param out The output stream observed.
* @param action The action.
*/
public void outputNotify(OutputStream out, int action, Object ignoredData) throws IOException {
if (_response == null) return;
switch (action) {
case OutputObserver.__FIRST_WRITE:
if (!_firstWrite) {
firstWrite();
_firstWrite = true;
}
break;
case OutputObserver.__RESET_BUFFER:
resetBuffer();
break;
case OutputObserver.__COMMITING:
commit();
break;
case OutputObserver.__CLOSING:
if (_response != null) {
completing();
if (!_response.isCommitted() && _request.getState() == HttpMessage.__MSG_RECEIVED)
commit();
}
break;
case OutputObserver.__CLOSED:
break;
}
}
/* ------------------------------------------------------------ */
protected void statsRequestStart() {
if (_statsOn) {
if (_reqTime > 0) statsRequestEnd();
_requests++;
_tmpTime = _request.getTimeStamp();
_reqTime = _tmpTime;
_httpServer.statsGotRequest();
}
}
/**
* Setup the reponse output stream. Use the current state of the request and response, to set
* tranfer parameters such as chunking and content length.
*/
protected void firstWrite() throws IOException {
if (_response.isCommitted()) return;
// Nobble the OutputStream for HEAD requests
if (HttpRequest.__HEAD.equals(_request.getMethod())) _outputStream.nullOutput();
int length = _response.getIntField(HttpFields.__ContentLength);
if (length >= 0) _outputStream.setContentLength(length);
}
/* Verify HTTP/1.1 request
* @exception HttpException problem with the request.
* @exception IOException problem with the connection.
*/
private void verifyHTTP_1_1() throws HttpException, IOException {
// Check Host Field exists
String host = _request.getField(HttpFields.__Host);
if (host == null) throw new HttpException(HttpResponse.__400_Bad_Request);
// check and enable requests transfer encodings.
String transfer_coding = _request.getField(HttpFields.__TransferEncoding);
if (transfer_coding != null && transfer_coding.length() > 0) {
// Handling of codings other than chunking is now
// the responsibility of handlers, filters or servlets.
// Thanks to the compression filter, we now don't know if
// what we can handle here.
if (transfer_coding.equalsIgnoreCase(HttpFields.__Chunked)
|| StringUtil.endsWithIgnoreCase(transfer_coding, HttpFields.__Chunked))
_inputStream.setChunking();
else if (StringUtil.asciiToLowerCase(transfer_coding).indexOf(HttpFields.__Chunked) >= 0)
throw new HttpException(HttpResponse.__400_Bad_Request);
}
// Check input content length can be determined
int content_length = _request.getIntField(HttpFields.__ContentLength);
String content_type = _request.getField(HttpFields.__ContentType);
if (!_inputStream.isChunking()) {
// If we have a content length, use it
if (content_length >= 0) _inputStream.setContentLength(content_length);
// else if we have no content
else if (content_type == null || content_type.length() == 0) _inputStream.setContentLength(0);
// else we need a content length
else {
// TODO - can't do this check as IE stuff up on
// a redirect.
// throw new HttpException(HttpResponse.__411_Length_Required);
_inputStream.setContentLength(0);
}
}
// Handle Continue Expectations
String expect = _request.getField(HttpFields.__Expect);
if (expect != null && expect.length() > 0) {
if (StringUtil.asciiToLowerCase(expect).equals(HttpFields.__ExpectContinue)) {
_inputStream.setExpectContinues(_outputStream.getOutputStream());
} else throw new HttpException(HttpResponse.__417_Expectation_Failed);
} else if (__2068_Continues
&& _inputStream.available() <= 0
&& (HttpRequest.__PUT.equals(_request.getMethod())
|| HttpRequest.__POST.equals(_request.getMethod()))) {
// Send continue for RFC 2068 exception
OutputStream real_out = _outputStream.getOutputStream();
real_out.write(HttpResponse.__Continue);
real_out.flush();
}
// Persistent unless requested otherwise
_persistent = !_close;
}
/* Verify HTTP/1.0 request
* @exception HttpException problem with the request.
* @exception IOException problem with the connection.
*/
private void verifyHTTP_1_0() {
// Set content length
int content_length = _request.getIntField(HttpFields.__ContentLength);
if (content_length >= 0) _inputStream.setContentLength(content_length);
else if (content_length < 0) {
// TODO - can't do this check because IE does this after
// a redirect.
// Can't have content without a content length
// String content_type=_request.getField(HttpFields.__ContentType);
// if (content_type!=null && content_type.length()>0)
// throw new HttpException(_HttpResponse.__411_Length_Required);
_inputStream.setContentLength(0);
}
// Check netscape proxy connection - this is not strictly correct.
if (!_keepAlive
&& HttpFields.__KeepAlive.equalsIgnoreCase(_request.getField(HttpFields.__ProxyConnection)))
_keepAlive = true;
// persistent connections in HTTP/1.0 only if requested.
_persistent = _keepAlive;
}
/** Recycle the connection. called by handle when handleNext returns true. */
protected void recycle() {
_listener.persistConnection(this);
if (_request != null) _request.recycle(this);
if (_response != null) _response.recycle(this);
}
/**
* Handle next request off the connection. The service(request,response) method is called by
* handle to service each request received on the connection. If the thread is a PoolThread, the
* thread is set as inactive when waiting for a request.
*
* <p>If a HttpTunnel has been set on this connection, it's handle method is called and when that
* completes, false is return from this method.
*
* <p>The Connection is set as a ThreadLocal of the calling thread and is available via the
* getHttpConnection() method.
*
* @return true if the connection is still open and may provide more requests.
*/
public boolean handleNext() {
// Handle a HTTP tunnel
if (_tunnel != null) {
if (log.isDebugEnabled()) log.debug("Tunnel: " + _tunnel);
_outputStream.resetObservers();
_tunnel.handle(_inputStream.getInputStream(), _outputStream.getOutputStream());
return false;
}
// Normal handling.
HttpContext context = null;
boolean stats = false;
try {
// Assume the connection is not persistent,
// unless told otherwise.
_persistent = false;
_close = false;
_keepAlive = false;
_firstWrite = false;
_completing = false;
_dotVersion = 0;
// Read requests
readRequest();
if (_listener == null || !_listener.isStarted()) {
// dead connection
_response.destroy();
_response = null;
_persistent = false;
return false;
}
_listener.customizeRequest(this, _request);
if (_request.getState() != HttpMessage.__MSG_RECEIVED)
throw new HttpException(HttpResponse.__400_Bad_Request);
// We have a valid request!
statsRequestStart();
stats = true;
// Pick response version, we assume that _request.getVersion() == 1
_dotVersion = _request.getDotVersion();
if (_dotVersion > 1) {
_dotVersion = 1;
}
// Common fields on the response
_response.setVersion(HttpMessage.__HTTP_1_1);
_response.setField(HttpFields.__Date, _request.getTimeStampStr());
if (!Version.isParanoid()) _response.setField(HttpFields.__Server, Version.getDetail());
// Handle Connection header field
Enumeration connectionValues =
_request.getFieldValues(HttpFields.__Connection, HttpFields.__separators);
if (connectionValues != null) {
while (connectionValues.hasMoreElements()) {
String token = connectionValues.nextElement().toString();
// handle close token
if (token.equalsIgnoreCase(HttpFields.__Close)) {
_close = true;
_response.setField(HttpFields.__Connection, HttpFields.__Close);
} else if (token.equalsIgnoreCase(HttpFields.__KeepAlive) && _dotVersion == 0)
_keepAlive = true;
// Remove headers for HTTP/1.0 requests
if (_dotVersion == 0) _request.forceRemoveField(token);
}
}
// Handle version specifics
if (_dotVersion == 1) verifyHTTP_1_1();
else if (_dotVersion == 0) verifyHTTP_1_0();
else if (_dotVersion != -1)
throw new HttpException(HttpResponse.__505_HTTP_Version_Not_Supported);
if (log.isDebugEnabled()) log.debug("REQUEST from " + _listener + ":\n" + _request);
// handle HttpListener handlers
if (!_request.isHandled() && _listener.getHttpHandler() != null)
_listener.getHttpHandler().handle("", null, _request, _response);
// service the request
if (!_request.isHandled()) context = service(_request, _response);
} catch (HttpException e) {
exception(e);
} catch (IOException e) {
if (_request.getState() != HttpMessage.__MSG_RECEIVED) {
if (log.isDebugEnabled()) {
if (log.isTraceEnabled()) log.trace(LogSupport.EXCEPTION, e);
else if (log.isDebugEnabled()) log.debug(e.toString());
}
_response.destroy();
_response = null;
} else exception(e);
} catch (Exception e) {
exception(e);
} catch (Error e) {
exception(e);
} finally {
int bytes_written = 0;
int content_length =
_response == null ? -1 : _response.getIntField(HttpFields.__ContentLength);
// Complete the request
if (_persistent) {
boolean no_continue_sent = false;
try {
if (_inputStream.getExpectContinues() != null) {
_inputStream.setExpectContinues(null);
no_continue_sent = true;
} else {
int remaining = _inputStream.getContentLength();
if (remaining != 0)
// Read remaining input
while (_inputStream.skip(4096) > 0 || _inputStream.read() >= 0) ;
}
} catch (IOException e) {
if (_inputStream.getContentLength() > 0) _inputStream.setContentLength(0);
_persistent = false;
LogSupport.ignore(log, e);
exception(new HttpException(HttpResponse.__400_Bad_Request, "Missing Content"));
}
// Check for no more content
if (!no_continue_sent && _inputStream.getContentLength() > 0) {
_inputStream.setContentLength(0);
_persistent = false;
exception(new HttpException(HttpResponse.__400_Bad_Request, "Missing Content"));
}
// Commit the response
try {
_outputStream.close();
bytes_written = _outputStream.getBytesWritten();
_outputStream.resetStream();
_outputStream.addObserver(this);
_inputStream.resetStream();
} catch (IOException e) {
exception(e);
}
} else if (_response != null) // There was a request
{
// half hearted attempt to eat any remaining input
try {
if (_inputStream.getContentLength() > 0)
while (_inputStream.skip(4096) > 0 || _inputStream.read() >= 0) ;
_inputStream.resetStream();
} catch (IOException e) {
LogSupport.ignore(log, e);
}
// commit non persistent
try {
_outputStream.flush();
_response.commit();
bytes_written = _outputStream.getBytesWritten();
_outputStream.close();
_outputStream.resetStream();
} catch (IOException e) {
exception(e);
}
}
// Check response length
if (_response != null) {
if (log.isDebugEnabled()) log.debug("RESPONSE:\n" + _response);
if (_persistent
&& content_length >= 0
&& bytes_written > 0
&& content_length != bytes_written) {
log.warn(
"Invalid length: Content-Length="
+ content_length
+ " written="
+ bytes_written
+ " for "
+ _request.getRequestURL());
_persistent = false;
try {
_outputStream.close();
} catch (IOException e) {
log.warn(LogSupport.EXCEPTION, e);
}
}
}
// stats & logging
if (stats) statsRequestEnd();
if (context != null) context.log(_request, _response, bytes_written);
}
return (_tunnel != null) || _persistent;
}
/* ------------------------------------------------------------ */
protected void readRequest() throws IOException {
_request.readHeader((LineInput) (_inputStream).getInputStream());
}
/* ------------------------------------------------------------ */
protected void commit() throws IOException {
if (_response.isCommitted()) return;
int status = _response.getStatus();
int length = -1;
// Check if there is missing content expectations
if (_inputStream.getExpectContinues() != null) {
// No input read yet - so assume it never will be
_inputStream.setExpectContinues(null);
_inputStream.unsafeSetContentLength(0);
}
// Handler forced close, listener stopped or no idle threads left.
boolean has_close = HttpFields.__Close.equals(_response.getField(HttpFields.__Connection));
if (!_persistent
|| _close
|| _listener != null && (!_listener.isStarted() || _listener.isOutOfResources())) {
_close = true;
if (!has_close) _response.setField(HttpFields.__Connection, HttpFields.__Close);
has_close = true;
}
if (_close) _persistent = false;
// Determine how to limit content length
if (_persistent) {
switch (_dotVersion) {
case 1:
{
String transfer_coding = _response.getField(HttpFields.__TransferEncoding);
if (transfer_coding == null
|| transfer_coding.length() == 0
|| HttpFields.__Identity.equalsIgnoreCase(transfer_coding)) {
// if (can have content and no content length)
if (status != HttpResponse.__304_Not_Modified
&& status != HttpResponse.__204_No_Content
&& _response.getField(HttpFields.__ContentLength) == null) {
if (_completing) {
length = _outputStream.getBytesWritten();
_response.setContentLength(length);
} else {
// Chunk it!
_response.setField(HttpFields.__TransferEncoding, HttpFields.__Chunked);
_outputStream.setChunking();
}
}
} else {
// Use transfer encodings to determine length
_response.removeField(HttpFields.__ContentLength);
_outputStream.setChunking();
if (!HttpFields.__Chunked.equalsIgnoreCase(transfer_coding)) {
// Check against any TE field
List te = _request.getAcceptableTransferCodings();
Enumeration enm =
_response.getFieldValues(
HttpFields.__TransferEncoding, HttpFields.__separators);
while (enm.hasMoreElements()) {
String coding = (String) enm.nextElement();
if (HttpFields.__Identity.equalsIgnoreCase(coding)
|| HttpFields.__Chunked.equalsIgnoreCase(coding)) continue;
if (te == null || !te.contains(coding))
throw new HttpException(HttpResponse.__501_Not_Implemented, coding);
}
}
}
}
break;
case 0:
{
// if (can have content and no content length)
_response.removeField(HttpFields.__TransferEncoding);
if (_keepAlive) {
if (status != HttpResponse.__304_Not_Modified
&& status != HttpResponse.__204_No_Content
&& _response.getField(HttpFields.__ContentLength) == null) {
if (_completing) {
length = _outputStream.getBytesWritten();
_response.setContentLength(length);
_response.setField(HttpFields.__Connection, HttpFields.__KeepAlive);
} else {
_response.setField(HttpFields.__Connection, HttpFields.__Close);
has_close = _close = true;
_persistent = false;
}
} else _response.setField(HttpFields.__Connection, HttpFields.__KeepAlive);
} else if (!has_close) _response.setField(HttpFields.__Connection, HttpFields.__Close);
break;
}
default:
{
_close = true;
_persistent = false;
_keepAlive = false;
}
}
}
// Mark request as handled.
_request.setHandled(true);
_outputStream.writeHeader(_response);
_outputStream.flush();
}
