@Override
public void handleRequest(
final HttpServerExchange exchange, final HttpCompletionHandler completionHandler) {
final Deque<String> res = exchange.getRequestHeaders().get(Headers.ACCEPT_ENCODING);
HttpHandler identityHandler = this.identityHandler;
if (res == null || res.isEmpty()) {
if (identityHandler != null) {
HttpHandlers.executeHandler(identityHandler, exchange, completionHandler);
} else {
// we don't have an identity handler
HttpHandlers.executeHandler(noEncodingHandler, exchange, completionHandler);
}
return;
}
boolean identityProhibited = false;
final List<ParsedEncoding> found = new ArrayList<ParsedEncoding>();
ParsedEncoding current = null;
for (final String header : res) {
final int l = header.length();
// we do not use a string builder
// we just keep track of where the current string starts and call substring()
int stringStart = 0;
for (int i = 0; i < l; ++i) {
char c = header.charAt(i);
switch (c) {
case ',':
{
if (current != null
&& (i - stringStart > 2
&& header.charAt(stringStart) == 'q'
&& header.charAt(stringStart + 1) == '=')) {
// if this is a valid qvalue
current.qvalue = header.substring(stringStart + 2, i);
if (current.encoding.equals("*")) {
if (handleDefault(found, current)) {
identityProhibited = true;
}
}
current = null;
} else if (stringStart != i) {
current = handleNewEncoding(found, header, stringStart, i);
}
stringStart = i + 1;
break;
}
case ';':
{
if (stringStart != i) {
current = handleNewEncoding(found, header, stringStart, i);
stringStart = i + 1;
}
break;
}
case ' ':
{
if (stringStart != i) {
if (current != null
&& (i - stringStart > 2
&& header.charAt(stringStart) == 'q'
&& header.charAt(stringStart + 1) == '=')) {
// if this is a valid qvalue
current.qvalue = header.substring(stringStart + 2, i);
if (current.encoding.equals("*")) {
if (handleDefault(found, current)) {
identityProhibited = true;
}
}
} else {
current = handleNewEncoding(found, header, stringStart, i);
}
}
stringStart = i + 1;
}
}
}
if (stringStart != l) {
if (current != null
&& (l - stringStart > 2
&& header.charAt(stringStart) == 'q'
&& header.charAt(stringStart + 1) == '=')) {
// if this is a valid qvalue
current.qvalue = header.substring(stringStart + 2, l);
if (current.encoding.equals("*")) {
if (handleDefault(found, current)) {
identityProhibited = true;
}
}
} else {
current = handleNewEncoding(found, header, stringStart, l);
}
}
}
int size = found.size();
if (size == 0) {
if (identityProhibited || identityHandler == null) {
HttpHandlers.executeHandler(noEncodingHandler, exchange, completionHandler);
return;
}
HttpHandlers.executeHandler(identityHandler, exchange, completionHandler);
} else if (size == 1) {
HttpHandlers.executeHandler(found.get(0).handler.handler, exchange, completionHandler);
} else {
ParsedEncoding max = found.get(0);
for (int i = 1; i < size; ++i) {
ParsedEncoding o = found.get(i);
if (o.compareTo(max) > 0) {
max = o;
}
}
HttpHandlers.executeHandler(max.handler.handler, exchange, completionHandler);
}
}
public void setNoEncodingHandler(HttpHandler noEncodingHandler) {
HttpHandlers.handlerNotNull(noEncodingHandler);
this.noEncodingHandler = noEncodingHandler;
}
public synchronized void addEncodingHandler(
final String encoding, final HttpHandler handler, int priority) {
HttpHandlers.handlerNotNull(handler);
this.encodingMap.put(encoding, new Encoding(handler, priority));
}
public void setIdentityHandler(final HttpHandler identityHandler) {
HttpHandlers.handlerNotNull(identityHandler);
this.identityHandler = identityHandler;
addEncodingHandler(IDENTITY, identityHandler, 0);
}
@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);
}
/**
* Set the next http handler.
*
* @param next the next http handler
*/
public void setNext(final HttpHandler next) {
HttpHandlers.handlerNotNull(next);
this.next = next;
}