@Override
public HttpServerExchange sendOutOfBandResponse(HttpServerExchange exchange) {
if (exchange == null || !HttpContinue.requiresContinueResponse(exchange)) {
throw UndertowMessages.MESSAGES.outOfBandResponseOnlyAllowedFor100Continue();
}
final ConduitState state = resetChannel();
HttpServerExchange newExchange = new HttpServerExchange(this);
for (HttpString header : exchange.getRequestHeaders().getHeaderNames()) {
newExchange.getRequestHeaders().putAll(header, exchange.getRequestHeaders().get(header));
}
newExchange.setProtocol(exchange.getProtocol());
newExchange.setRequestMethod(exchange.getRequestMethod());
newExchange.setRequestPath(exchange.getRequestPath());
newExchange.getRequestHeaders().put(Headers.CONNECTION, Headers.KEEP_ALIVE.toString());
newExchange.getRequestHeaders().put(Headers.CONTENT_LENGTH, 0);
newExchange.addExchangeCompleteListener(
new ExchangeCompletionListener() {
@Override
public void exchangeEvent(HttpServerExchange exchange, NextListener nextListener) {
restoreChannel(state);
}
});
return newExchange;
}
@Override
public void handleRequest(final HttpServerExchange exchange) {
final HeaderMap requestHeaders = exchange.getRequestHeaders();
boolean persistentConnection;
final boolean hasConnectionHeader = requestHeaders.contains(Headers.CONNECTION);
final boolean hasTransferEncoding = requestHeaders.contains(Headers.TRANSFER_ENCODING);
final boolean hasContentLength = requestHeaders.contains(Headers.CONTENT_LENGTH);
if (exchange.isHttp11()) {
persistentConnection =
!(hasConnectionHeader
&& new HttpString(requestHeaders.getFirst(Headers.CONNECTION)).equals(Headers.CLOSE));
} else if (exchange.isHttp10()) {
persistentConnection = false;
if (hasConnectionHeader) {
for (String value : requestHeaders.get(Headers.CONNECTION)) {
if (Headers.KEEP_ALIVE.equals(new HttpString(value))) {
persistentConnection = true;
break;
}
}
}
} else {
log.trace("Connection not persistent");
persistentConnection = false;
}
HttpString transferEncoding = Headers.IDENTITY;
if (hasTransferEncoding) {
transferEncoding = new HttpString(requestHeaders.getLast(Headers.TRANSFER_ENCODING));
}
if (hasTransferEncoding && !transferEncoding.equals(Headers.IDENTITY)) {
exchange.addRequestWrapper(chunkedStreamSourceChannelWrapper());
} else if (hasContentLength) {
final long contentLength;
try {
contentLength = Long.parseLong(requestHeaders.get(Headers.CONTENT_LENGTH).getFirst());
} catch (NumberFormatException e) {
log.trace("Invalid request due to unparsable content length");
// content length is bad; invalid request
exchange.setResponseCode(400);
exchange.endExchange();
return;
}
if (contentLength == 0L) {
log.trace("No content, starting next request");
// no content - immediately start the next request, returning an empty stream for this one
exchange.addRequestWrapper(emptyStreamSourceChannelWrapper());
exchange.terminateRequest();
} else {
// fixed-length content - add a wrapper for a fixed-length stream
exchange.addRequestWrapper(fixedLengthStreamSourceChannelWrapper(contentLength));
}
} else if (hasTransferEncoding) {
if (transferEncoding.equals(Headers.IDENTITY)) {
log.trace("Connection not persistent (no content length and identity transfer encoding)");
// make it not persistent
persistentConnection = false;
}
} else if (persistentConnection) {
// no content - immediately start the next request, returning an empty stream for this one
exchange.terminateRequest();
exchange.addRequestWrapper(emptyStreamSourceChannelWrapper());
}
exchange.setPersistent(persistentConnection);
// now the response wrapper, to add in the appropriate connection control headers
exchange.addResponseWrapper(responseWrapper(persistentConnection));
HttpHandlers.executeHandler(next, exchange);
}