HttpServerExchange.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.server;
import io.undertow.UndertowLogger;
import io.undertow.UndertowMessages;
import io.undertow.UndertowOptions;
import io.undertow.channels.DetachableStreamSinkChannel;
import io.undertow.channels.DetachableStreamSourceChannel;
import io.undertow.conduits.EmptyStreamSourceConduit;
import io.undertow.connector.PooledByteBuffer;
import io.undertow.io.AsyncReceiverImpl;
import io.undertow.io.AsyncSenderImpl;
import io.undertow.io.BlockingReceiverImpl;
import io.undertow.io.BlockingSenderImpl;
import io.undertow.io.Receiver;
import io.undertow.io.Sender;
import io.undertow.io.UndertowInputStream;
import io.undertow.io.UndertowOutputStream;
import io.undertow.security.api.SecurityContext;
import io.undertow.server.handlers.Cookie;
import io.undertow.util.AbstractAttachable;
import io.undertow.util.AttachmentKey;
import io.undertow.util.ConduitFactory;
import io.undertow.util.Cookies;
import io.undertow.util.HeaderMap;
import io.undertow.util.HeaderValues;
import io.undertow.util.Headers;
import io.undertow.util.HttpString;
import io.undertow.util.Methods;
import io.undertow.util.NetworkUtils;
import io.undertow.util.Protocols;
import io.undertow.util.Rfc6265CookieSupport;
import io.undertow.util.StatusCodes;
import org.jboss.logging.Logger;
import org.xnio.Buffers;
import org.xnio.ChannelExceptionHandler;
import org.xnio.ChannelListener;
import org.xnio.ChannelListeners;
import org.xnio.IoUtils;
import org.xnio.XnioIoThread;
import org.xnio.channels.Channels;
import org.xnio.channels.Configurable;
import org.xnio.channels.StreamSinkChannel;
import org.xnio.channels.StreamSourceChannel;
import org.xnio.conduits.Conduit;
import org.xnio.conduits.ConduitStreamSinkChannel;
import org.xnio.conduits.ConduitStreamSourceChannel;
import org.xnio.conduits.StreamSinkConduit;
import org.xnio.conduits.StreamSourceConduit;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.Channel;
import java.nio.channels.FileChannel;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
import static org.xnio.Bits.allAreSet;
import static org.xnio.Bits.anyAreClear;
import static org.xnio.Bits.anyAreSet;
import static org.xnio.Bits.intBitMask;
/**
* An HTTP server request/response exchange. An instance of this class is constructed as soon as the request headers are
* fully parsed.
*
* @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
* @author <a href="mailto:ropalka@redhat.com">Richard Opalka</a>
*/
public final class HttpServerExchange extends AbstractAttachable {
// immutable state
private static final Logger log = Logger.getLogger(HttpServerExchange.class);
private static final RuntimePermission SET_SECURITY_CONTEXT = new RuntimePermission("io.undertow.SET_SECURITY_CONTEXT");
private static final String ISO_8859_1 = "ISO-8859-1";
private static final String HTTPS = "https";
/**
* The HTTP reason phrase to send. This is an attachment rather than a field as it is rarely used. If this is not set
* a generic description from the RFC is used instead.
*/
private static final AttachmentKey<String> REASON_PHRASE = AttachmentKey.create(String.class);
/**
* The attachment key that buffered request data is attached under.
*/
static final AttachmentKey<PooledByteBuffer[]> BUFFERED_REQUEST_DATA = AttachmentKey.create(PooledByteBuffer[].class);
/**
* Attachment key that can be used to hold additional request attributes
*/
public static final AttachmentKey<Map<String, String>> REQUEST_ATTRIBUTES = AttachmentKey.create(Map.class);
/**
* Attachment key that can be used to hold a remotely authenticated user
*/
public static final AttachmentKey<String> REMOTE_USER = AttachmentKey.create(String.class);
/**
* Attachment key that can be used as a flag of secure attribute
*/
public static final AttachmentKey<Boolean> SECURE_REQUEST = AttachmentKey.create(Boolean.class);
private final ServerConnection connection;
private final HeaderMap requestHeaders;
private final HeaderMap responseHeaders;
private int exchangeCompletionListenersCount = 0;
private ExchangeCompletionListener[] exchangeCompleteListeners;
private DefaultResponseListener[] defaultResponseListeners;
private Map<String, Deque<String>> queryParameters;
private Map<String, Deque<String>> pathParameters;
private DelegatingIterable<Cookie> requestCookies;
private DelegatingIterable<Cookie> responseCookies;
private Map<String, Cookie> deprecatedRequestCookies;
private Map<String, Cookie> deprecatedResponseCookies;
/**
* The actual response channel. May be null if it has not been created yet.
*/
private WriteDispatchChannel responseChannel;
/**
* The actual request channel. May be null if it has not been created yet.
*/
protected ReadDispatchChannel requestChannel;
private BlockingHttpExchange blockingHttpExchange;
private HttpString protocol;
/**
* The security context
*/
private SecurityContext securityContext;
// mutable state
private volatile int state = 200;
private static final AtomicIntegerFieldUpdater<HttpServerExchange> stateUpdater = AtomicIntegerFieldUpdater.newUpdater(HttpServerExchange.class, "state");
private HttpString requestMethod = HttpString.EMPTY;
private String requestScheme;
/**
* The original request URI. This will include the host name if it was specified by the client.
* <p>
* This is not decoded in any way, and does not include the query string.
* <p>
* Examples:
* GET http://localhost:8080/myFile.jsf?foo=bar HTTP/1.1 -> 'http://localhost:8080/myFile.jsf'
* POST /my+File.jsf?foo=bar HTTP/1.1 -> '/my+File.jsf'
*/
private String requestURI;
/**
* The request path. This will be decoded by the server, and does not include the query string.
* <p>
* This path is not canonicalised, so care must be taken to ensure that escape attacks are not possible.
* <p>
* Examples:
* GET http://localhost:8080/b/../my+File.jsf?foo=bar HTTP/1.1 -> '/b/../my+File.jsf'
* POST /my+File.jsf?foo=bar HTTP/1.1 -> '/my File.jsf'
*/
private String requestPath;
/**
* The remaining unresolved portion of request path. If a {@link io.undertow.server.handlers.CanonicalPathHandler} is
* installed this will be canonicalised.
* <p>
* Initially this will be equal to {@link #requestPath}, however it will be modified as handlers resolve the path.
*/
private String relativePath;
/**
* The resolved part of the canonical path.
*/
private String resolvedPath = "";
/**
* the query string
*/
private String queryString = "";
/**
* the non-decoded query string. Set only when query string goes through decoding
*/
private String nonDecodedQueryString = null;
private int requestWrapperCount = 0;
private ConduitWrapper<StreamSourceConduit>[] requestWrappers; //we don't allocate these by default, as for get requests they are not used
private int responseWrapperCount = 0;
private ConduitWrapper<StreamSinkConduit>[] responseWrappers;
private Sender sender;
private Receiver receiver;
private long requestStartTime = -1;
/**
* The maximum entity size. This can be modified before the request stream is obtained, however once the request
* stream is obtained this cannot be modified further.
* <p>
* The default value for this is determined by the {@link io.undertow.UndertowOptions#MAX_ENTITY_SIZE} option. A value
* of 0 indicates that this is unbounded.
* <p>
* In case of multipart handling, this will default to {@link io.undertow.UndertowOptions#MULTIPART_MAX_ENTITY_SIZE}
* <p>
* If this entity size is exceeded the request channel will be forcibly closed.
* <p>
* TODO: integrate this with HTTP 100-continue responses, to make it possible to send a 417 rather than just forcibly
* closing the channel.
*
* @see io.undertow.UndertowOptions#MAX_ENTITY_SIZE
* @see io.undertow.UndertowOptions#MULTIPART_MAX_ENTITY_SIZE
*/
private long maxEntitySize;
/**
* When the call stack return this task will be executed by the executor specified in {@link #dispatchExecutor}.
* If the executor is null then it will be executed by the XNIO worker.
*/
private Runnable dispatchTask;
/**
* The executor that is to be used to dispatch the {@link #dispatchTask}. Note that this is not cleared
* between dispatches, so once a request has been dispatched once then all subsequent dispatches will use
* the same executor.
*/
private Executor dispatchExecutor;
/**
* The number of bytes that have been sent to the remote client. This does not include headers,
* only the entity body, and does not take any transfer or content encoding into account.
*/
private long responseBytesSent = 0;
private static final int MASK_RESPONSE_CODE = intBitMask(0, 9);
/**
* Flag that is set when the response sending begins
*/
private static final int FLAG_RESPONSE_SENT = 1 << 10;
/**
* Flag that is sent when the response has been fully written and flushed.
*/
private static final int FLAG_RESPONSE_TERMINATED = 1 << 11;
/**
* Flag that is set once the request has been fully read. For zero
* length requests this is set immediately.
*/
private static final int FLAG_REQUEST_TERMINATED = 1 << 12;
/**
* Flag that is set if this is a persistent connection, and the
* connection should be re-used.
*/
private static final int FLAG_PERSISTENT = 1 << 14;
/**
* If this flag is set it means that the request has been dispatched,
* and will not be ending when the call stack returns.
* <p>
* This could be because it is being dispatched to a worker thread from
* an IO thread, or because resume(Reads/Writes) has been called.
*/
private static final int FLAG_DISPATCHED = 1 << 15;
/**
* Flag that is set if the {@link #requestURI} field contains the hostname.
*/
private static final int FLAG_URI_CONTAINS_HOST = 1 << 16;
/**
* If this flag is set then the request is current running through a
* handler chain.
* <p>
* This will be true most of the time, this only time this will return
* false is when performing async operations outside the scope of a call to
* {@link Connectors#executeRootHandler(HttpHandler, HttpServerExchange)},
* such as when performing async IO.
* <p>
* If this is true then when the call stack returns the exchange will either be dispatched,
* or the exchange will be ended.
*/
private static final int FLAG_IN_CALL = 1 << 17;
/**
* Flag that indicates that reads should be resumed when the call stack returns.
*/
private static final int FLAG_SHOULD_RESUME_READS = 1 << 18;
/**
* Flag that indicates that writes should be resumed when the call stack returns
*/
private static final int FLAG_SHOULD_RESUME_WRITES = 1 << 19;
/**
* Flag that indicates that the request channel has been reset, and {@link #getRequestChannel()} can be called again
*/
private static final int FLAG_REQUEST_RESET= 1 << 20;
/**
* The source address for the request. If this is null then the actual source address from the channel is used
*/
private InetSocketAddress sourceAddress;
/**
* The destination address for the request. If this is null then the actual source address from the channel is used
*/
private InetSocketAddress destinationAddress;
private static final AtomicLong REQUEST_ID_GENERATOR = new AtomicLong(0);
private final String requestId = Long.toString(REQUEST_ID_GENERATOR.incrementAndGet());
public HttpServerExchange(final ServerConnection connection, long maxEntitySize) {
this(connection, new HeaderMap(), new HeaderMap(), maxEntitySize);
}
public HttpServerExchange(final ServerConnection connection) {
this(connection, 0);
}
public HttpServerExchange(final ServerConnection connection, final HeaderMap requestHeaders, final HeaderMap responseHeaders, long maxEntitySize) {
this.connection = connection;
this.maxEntitySize = maxEntitySize;
this.requestHeaders = requestHeaders;
this.responseHeaders = responseHeaders;
}
/**
* Get the request protocol string. Normally this is one of the strings listed in {@link Protocols}.
*
* @return the request protocol string
*/
public HttpString getProtocol() {
return protocol;
}
/**
* Sets the http protocol
*
* @param protocol
*/
public HttpServerExchange setProtocol(final HttpString protocol) {
this.protocol = protocol;
return this;
}
/**
* Determine whether this request conforms to HTTP 0.9.
*
* @return {@code true} if the request protocol is equal to {@link Protocols#HTTP_0_9}, {@code false} otherwise
*/
public boolean isHttp09() {
return protocol.equals(Protocols.HTTP_0_9);
}
/**
* Determine whether this request conforms to HTTP 1.0.
*
* @return {@code true} if the request protocol is equal to {@link Protocols#HTTP_1_0}, {@code false} otherwise
*/
public boolean isHttp10() {
return protocol.equals(Protocols.HTTP_1_0);
}
/**
* Determine whether this request conforms to HTTP 1.1.
*
* @return {@code true} if the request protocol is equal to {@link Protocols#HTTP_1_1}, {@code false} otherwise
*/
public boolean isHttp11() {
return protocol.equals(Protocols.HTTP_1_1);
}
public boolean isSecure() {
Boolean secure = getAttachment(SECURE_REQUEST);
if(secure != null && secure) {
return true;
}
String scheme = getRequestScheme();
if (scheme != null && scheme.equalsIgnoreCase(HTTPS)) {
return true;
}
return false;
}
/**
* Get the HTTP request method. Normally this is one of the strings listed in {@link io.undertow.util.Methods}.
*
* @return the HTTP request method
*/
public HttpString getRequestMethod() {
return requestMethod;
}
/**
* Set the HTTP request method.
*
* @param requestMethod the HTTP request method
*/
public HttpServerExchange setRequestMethod(final HttpString requestMethod) {
this.requestMethod = requestMethod;
return this;
}
/**
* Get the request URI scheme. Normally this is one of {@code http} or {@code https}.
*
* @return the request URI scheme
*/
public String getRequestScheme() {
return requestScheme;
}
/**
* Set the request URI scheme.
*
* @param requestScheme the request URI scheme
*/
public HttpServerExchange setRequestScheme(final String requestScheme) {
this.requestScheme = requestScheme;
return this;
}
public String getRequestId() {
return requestId;
}
/**
* The original request URI. This will include the host name, protocol etc
* if it was specified by the client.
* <p>
* This is not decoded in any way, and does not include the query string.
* <p>
* Examples:
* GET http://localhost:8080/myFile.jsf?foo=bar HTTP/1.1 -> 'http://localhost:8080/myFile.jsf'
* POST /my+File.jsf?foo=bar HTTP/1.1 -> '/my+File.jsf'
* For the query string, see {@link #getQueryString} and {@link #getNonDecodedQueryString} .
*/
public String getRequestURI() {
return requestURI;
}
/**
* Sets the request URI
*
* @param requestURI The new request URI
*/
public HttpServerExchange setRequestURI(final String requestURI) {
this.requestURI = requestURI;
return this;
}
/**
* Sets the request URI
*
* @param requestURI The new request URI
* @param containsHost If this is true the request URI contains the host part
*/
public HttpServerExchange setRequestURI(final String requestURI, boolean containsHost) {
this.requestURI = requestURI;
if (containsHost) {
setFlags(FLAG_URI_CONTAINS_HOST);
} else {
clearFlags(FLAG_URI_CONTAINS_HOST);
}
return this;
}
/**
* If a request was submitted to the server with a full URI instead of just a path this
* will return true. For example:
* <p>
* GET http://localhost:8080/b/../my+File.jsf?foo=bar HTTP/1.1 -> true
* POST /my+File.jsf?foo=bar HTTP/1.1 -> false
*
* @return <code>true</code> If the request URI contains the host part of the URI
*/
public boolean isHostIncludedInRequestURI() {
return anyAreSet(state, FLAG_URI_CONTAINS_HOST);
}
/**
* The request path. This will be decoded by the server, and does not include the query string.
* <p>
* This path is not canonicalised, so care must be taken to ensure that escape attacks are not possible.
* <p>
* Examples:
* GET http://localhost:8080/b/../my+File.jsf?foo=bar HTTP/1.1 -> '/b/../my+File.jsf'
* POST /my+File.jsf?foo=bar HTTP/1.1 -> '/my File.jsf'
*/
public String getRequestPath() {
return requestPath;
}
/**
* Set the request URI path.
*
* @param requestPath the request URI path
*/
public HttpServerExchange setRequestPath(final String requestPath) {
this.requestPath = requestPath;
return this;
}
/**
* Get the request relative path. This is the path which should be evaluated by the current handler.
* <p>
* If the {@link io.undertow.server.handlers.CanonicalPathHandler} is installed in the current chain
* then this path with be canonicalized
*
* @return the request relative path
*/
public String getRelativePath() {
return relativePath;
}
/**
* Set the request relative path.
*
* @param relativePath the request relative path
*/
public HttpServerExchange setRelativePath(final String relativePath) {
this.relativePath = relativePath;
return this;
}
/**
* Get the resolved path.
*
* @return the resolved path
*/
public String getResolvedPath() {
return resolvedPath;
}
/**
* Set the resolved path.
*
* @param resolvedPath the resolved path
*/
public HttpServerExchange setResolvedPath(final String resolvedPath) {
this.resolvedPath = resolvedPath;
return this;
}
/**
*
* @return The query string, without the leading ?
*/
public String getQueryString() {
return queryString;
}
/**
* Set query string. Leading {@code '?'} char will be removed automatically.
*
* @return this http server exchange
*/
public HttpServerExchange setQueryString(final String queryString) {
// Clean leading ?
if( queryString.length() > 0 && queryString.charAt(0) == '?' ) {
this.queryString = queryString.substring(1);
} else {
this.queryString = queryString;
}
return this;
}
/**
* Returns the query string as originally contained in the request, without any decoding.
* The returned string does not contain the leading {@code '?'} char.
*
* @return The request query string, without the leading {@code '?'}, non-decoded.
*/
public String getNonDecodedQueryString() {
return this.nonDecodedQueryString == null? this.queryString: this.nonDecodedQueryString;
}
/**
* Sets the non-decoded query string. Leading {@code '?'} char will be removed automatically.<p>
* Must be invoked only if the {@link #getQueryString() query string} has gone through decoding. In such case, we expect
* that both forms of the query string will be set in the exchange: {@link #setQueryString decoded} and non-decoded.
*
* @param nonDecodedQueryString the query string as originally contained in the request, without any decoding
* @return this http server exchange
*/
public HttpServerExchange setNonDecodedQueryString(String nonDecodedQueryString) {
// Clean leading ?
if( nonDecodedQueryString.length() > 0 && nonDecodedQueryString.charAt(0) == '?' ) {
this.nonDecodedQueryString = nonDecodedQueryString.substring(1);
} else {
this.nonDecodedQueryString = nonDecodedQueryString;
}
return this;
}
/**
* Reconstructs the complete URL as seen by the user. This includes scheme, host name etc,
* but does not include query string.
* <p>
* This is not decoded.
*/
public String getRequestURL() {
if (isHostIncludedInRequestURI()) {
return getRequestURI();
} else {
return getRequestScheme() + "://" + getHostAndPort() + getRequestURI();
}
}
/**
* Returns the request charset. If none was explicitly specified it will return
* "ISO-8859-1", which is the default charset for HTTP requests.
*
* @return The character encoding
*/
public String getRequestCharset() {
return extractCharset(requestHeaders);
}
/**
* Returns the response charset. If none was explicitly specified it will return
* "ISO-8859-1", which is the default charset for HTTP requests.
*
* @return The character encoding
*/
public String getResponseCharset() {
HeaderMap headers = responseHeaders;
return extractCharset(headers);
}
private String extractCharset(HeaderMap headers) {
String contentType = headers.getFirst(Headers.CONTENT_TYPE);
if (contentType != null) {
String value = Headers.extractQuotedValueFromHeader(contentType, "charset");
if (value != null) {
return value;
}
}
return ISO_8859_1;
}
/**
* Return the host that this request was sent to, in general this will be the
* value of the Host header, minus the port specifier.
* <p>
* If this resolves to an IPv6 address it will not be enclosed by square brackets.
* Care must be taken when constructing URLs based on this method to ensure IPv6 URLs
* are handled correctly.
*
* @return The host part of the destination address
*/
public String getHostName() {
String host = requestHeaders.getFirst(Headers.HOST);
if (host == null || "".equals(host.trim())) {
host = getDestinationAddress().getHostString();
} else {
if (host.startsWith("[")) {
host = host.substring(1, host.indexOf(']'));
} else if (host.indexOf(':') != -1) {
host = host.substring(0, host.indexOf(':'));
}
}
return host;
}
/**
* Return the host, and also the port if this request was sent to a non-standard port. In general
* this will just be the value of the Host header.
* <p>
* If this resolves to an IPv6 address it *will* be enclosed by square brackets. The return
* value of this method is suitable for inclusion in a URL.
*
* @return The host and port part of the destination address
*/
public String getHostAndPort() {
String host = requestHeaders.getFirst(Headers.HOST);
if (host == null || "".equals(host.trim())) {
InetSocketAddress address = getDestinationAddress();
host = NetworkUtils.formatPossibleIpv6Address(address.getHostString());
int port = address.getPort();
if (!((getRequestScheme().equals("http") && port == 80)
|| (getRequestScheme().equals("https") && port == 443))) {
host = host + ":" + port;
}
}
return host;
}
/**
* Return the port that this request was sent to. In general this will be the value of the Host
* header, minus the host name.
*
* @return The port part of the destination address
*/
public int getHostPort() {
String host = requestHeaders.getFirst(Headers.HOST);
if (host != null) {
//for ipv6 addresses we make sure we take out the first part, which can have multiple occurrences of :
final int colonIndex;
if (host.startsWith("[")) {
colonIndex = host.indexOf(':', host.indexOf(']'));
} else {
colonIndex = host.indexOf(':');
}
if (colonIndex != -1) {
try {
return Integer.parseInt(host.substring(colonIndex + 1));
} catch (NumberFormatException ignore) {}
}
if (getRequestScheme().equals("https")) {
return 443;
} else if (getRequestScheme().equals("http")) {
return 80;
}
}
return getDestinationAddress().getPort();
}
/**
* Get the underlying HTTP connection.
*
* @return the underlying HTTP connection
*/
public ServerConnection getConnection() {
return connection;
}
public boolean isPersistent() {
return anyAreSet(state, FLAG_PERSISTENT);
}
/**
*
* @return <code>true</code> If the current thread in the IO thread for the exchange
*/
public boolean isInIoThread() {
return getIoThread() == Thread.currentThread();
}
/**
*
* @return True if this exchange represents an upgrade response
*/
public boolean isUpgrade() {
return getStatusCode() == StatusCodes.SWITCHING_PROTOCOLS;
}
/**
*
* @return The number of bytes sent in the entity body
*/
public long getResponseBytesSent() {
if(Connectors.isEntityBodyAllowed(this) && !getRequestMethod().equals(Methods.HEAD)) {
return responseBytesSent;
} else {
return 0; //body is not allowed, even if we attempt to write it will be ignored
}
}
/**
* Updates the number of response bytes sent. Used when compression is in use
* @param bytes The number of bytes to increase the response size by. May be negative
*/
void updateBytesSent(long bytes) {
if(Connectors.isEntityBodyAllowed(this) && !getRequestMethod().equals(Methods.HEAD)) {
responseBytesSent += bytes;
}
}
public HttpServerExchange setPersistent(final boolean persistent) {
if (persistent) {
setFlags(FLAG_PERSISTENT);
} else {
clearFlags(FLAG_PERSISTENT);
}
return this;
}
public boolean isDispatched() {
return anyAreSet(state, FLAG_DISPATCHED);
}
public HttpServerExchange unDispatch() {
clearFlags(FLAG_DISPATCHED);
dispatchTask = null;
return this;
}
/**
* {@link #dispatch(Executor, Runnable)} should be used instead of this method, as it is hard to use safely.
*
* Use {@link io.undertow.util.SameThreadExecutor#INSTANCE} if you do not want to dispatch to another thread.
*
* @return this exchange
*/
@Deprecated
public HttpServerExchange dispatch() {
setFlags(FLAG_DISPATCHED);
return this;
}
/**
* Dispatches this request to the XNIO worker thread pool. Once the call stack returns
* the given runnable will be submitted to the executor.
* <p>
* In general handlers should first check the value of {@link #isInIoThread()} before
* calling this method, and only dispatch if the request is actually running in the IO
* thread.
*
* @param runnable The task to run
* @throws IllegalStateException If this exchange has already been dispatched
*/
public HttpServerExchange dispatch(final Runnable runnable) {
dispatch(null, runnable);
return this;
}
/**
* Dispatches this request to the given executor. Once the call stack returns
* the given runnable will be submitted to the executor.
* <p>
* In general handlers should first check the value of {@link #isInIoThread()} before
* calling this method, and only dispatch if the request is actually running in the IO
* thread.
*
* @param runnable The task to run
* @throws IllegalStateException If this exchange has already been dispatched
*/
public HttpServerExchange dispatch(final Executor executor, final Runnable runnable) {
if (isInCall()) {
if (executor != null) {
this.dispatchExecutor = executor;
}
setFlags(FLAG_DISPATCHED);
if(anyAreSet(state, FLAG_SHOULD_RESUME_READS | FLAG_SHOULD_RESUME_WRITES)) {
throw UndertowMessages.MESSAGES.resumedAndDispatched();
}
this.dispatchTask = runnable;
} else {
if (executor == null) {
getConnection().getWorker().execute(runnable);
} else {
executor.execute(runnable);
}
}
return this;
}
public HttpServerExchange dispatch(final HttpHandler handler) {
dispatch(null, handler);
return this;
}
public HttpServerExchange dispatch(final Executor executor, final HttpHandler handler) {
final Runnable runnable = new Runnable() {
@Override
public void run() {
Connectors.executeRootHandler(handler, HttpServerExchange.this);
}
};
dispatch(executor, runnable);
return this;
}
/**
* Sets the executor that is used for dispatch operations where no executor is specified.
*
* @param executor The executor to use
*/
public HttpServerExchange setDispatchExecutor(final Executor executor) {
if (executor == null) {
dispatchExecutor = null;
} else {
dispatchExecutor = executor;
}
return this;
}
/**
* Gets the current executor that is used for dispatch operations. This may be null
*
* @return The current dispatch executor
*/
public Executor getDispatchExecutor() {
return dispatchExecutor;
}
/**
* @return The current dispatch task
*/
Runnable getDispatchTask() {
return dispatchTask;
}
boolean isInCall() {
return anyAreSet(state, FLAG_IN_CALL);
}
HttpServerExchange setInCall(boolean value) {
if (value) {
setFlags(FLAG_IN_CALL);
} else {
clearFlags(FLAG_IN_CALL);
}
return this;
}
/**
* Upgrade the channel to a raw socket. This method set the response code to 101, and then marks both the
* request and response as terminated, which means that once the current request is completed the raw channel
* can be obtained from {@link io.undertow.server.protocol.http.HttpServerConnection#getChannel()}
*
* @throws IllegalStateException if a response or upgrade was already sent, or if the request body is already being
* read
*/
public HttpServerExchange upgradeChannel(final HttpUpgradeListener listener) {
if (!connection.isUpgradeSupported()) {
throw UndertowMessages.MESSAGES.upgradeNotSupported();
}
if(!getRequestHeaders().contains(Headers.UPGRADE)) {
throw UndertowMessages.MESSAGES.notAnUpgradeRequest();
}
UndertowLogger.REQUEST_LOGGER.debugf("Upgrading request %s", this);
connection.setUpgradeListener(listener);
setStatusCode(StatusCodes.SWITCHING_PROTOCOLS);
getResponseHeaders().put(Headers.CONNECTION, Headers.UPGRADE_STRING);
return this;
}
/**
* Upgrade the channel to a raw socket. This method set the response code to 101, and then marks both the
* request and response as terminated, which means that once the current request is completed the raw channel
* can be obtained from {@link io.undertow.server.protocol.http.HttpServerConnection#getChannel()}
*
* @param productName the product name to report to the client
* @throws IllegalStateException if a response or upgrade was already sent, or if the request body is already being
* read
*/
public HttpServerExchange upgradeChannel(String productName, final HttpUpgradeListener listener) {
if (!connection.isUpgradeSupported()) {
throw UndertowMessages.MESSAGES.upgradeNotSupported();
}
UndertowLogger.REQUEST_LOGGER.debugf("Upgrading request %s", this);
connection.setUpgradeListener(listener);
setStatusCode(StatusCodes.SWITCHING_PROTOCOLS);
final HeaderMap headers = getResponseHeaders();
headers.put(Headers.UPGRADE, productName);
headers.put(Headers.CONNECTION, Headers.UPGRADE_STRING);
return this;
}
/**
*
* @param connectListener
* @return
*/
public HttpServerExchange acceptConnectRequest(HttpUpgradeListener connectListener) {
if(!getRequestMethod().equals(Methods.CONNECT)) {
throw UndertowMessages.MESSAGES.notAConnectRequest();
}
connection.setConnectListener(connectListener);
return this;
}
public HttpServerExchange addExchangeCompleteListener(final ExchangeCompletionListener listener) {
if(isComplete() || this.exchangeCompletionListenersCount == -1) {
throw UndertowMessages.MESSAGES.exchangeAlreadyComplete();
}
final int exchangeCompletionListenersCount = this.exchangeCompletionListenersCount++;
ExchangeCompletionListener[] exchangeCompleteListeners = this.exchangeCompleteListeners;
if (exchangeCompleteListeners == null || exchangeCompleteListeners.length == exchangeCompletionListenersCount) {
ExchangeCompletionListener[] old = exchangeCompleteListeners;
this.exchangeCompleteListeners = exchangeCompleteListeners = new ExchangeCompletionListener[exchangeCompletionListenersCount + 2];
if(old != null) {
System.arraycopy(old, 0, exchangeCompleteListeners, 0, exchangeCompletionListenersCount);
}
}
exchangeCompleteListeners[exchangeCompletionListenersCount] = listener;
return this;
}
public HttpServerExchange addDefaultResponseListener(final DefaultResponseListener listener) {
int i = 0;
if(defaultResponseListeners == null) {
defaultResponseListeners = new DefaultResponseListener[2];
} else {
while (i != defaultResponseListeners.length && defaultResponseListeners[i] != null) {
++i;
}
if (i == defaultResponseListeners.length) {
DefaultResponseListener[] old = defaultResponseListeners;
defaultResponseListeners = new DefaultResponseListener[defaultResponseListeners.length + 2];
System.arraycopy(old, 0, defaultResponseListeners, 0, old.length);
}
}
defaultResponseListeners[i] = listener;
return this;
}
/**
* Get the source address of the HTTP request.
*
* @return the source address of the HTTP request
*/
public InetSocketAddress getSourceAddress() {
if (sourceAddress != null) {
return sourceAddress;
}
return connection.getPeerAddress(InetSocketAddress.class);
}
/**
* Sets the source address of the HTTP request. If this is not explicitly set
* the actual source address of the channel is used.
*
* @param sourceAddress The address
*/
public HttpServerExchange setSourceAddress(InetSocketAddress sourceAddress) {
this.sourceAddress = sourceAddress;
return this;
}
/**
* Get the destination address of the HTTP request.
*
* @return the destination address of the HTTP request
*/
public InetSocketAddress getDestinationAddress() {
if (destinationAddress != null) {
return destinationAddress;
}
return connection.getLocalAddress(InetSocketAddress.class);
}
/**
* Sets the destination address of the HTTP request. If this is not explicitly set
* the actual destination address of the channel is used.
*
* @param destinationAddress The address
*/
public HttpServerExchange setDestinationAddress(InetSocketAddress destinationAddress) {
this.destinationAddress = destinationAddress;
return this;
}
/**
* Get the request headers.
*
* @return the request headers
*/
public HeaderMap getRequestHeaders() {
return requestHeaders;
}
/**
* @return The content length of the request, or <code>-1</code> if it has not been set
*/
public long getRequestContentLength() {
String contentLengthString = requestHeaders.getFirst(Headers.CONTENT_LENGTH);
if (contentLengthString == null) {
return -1;
}
return Long.parseLong(contentLengthString);
}
/**
* Get the response headers.
*
* @return the response headers
*/
public HeaderMap getResponseHeaders() {
return responseHeaders;
}
/**
* @return The content length of the response, or <code>-1</code> if it has not been set
*/
public long getResponseContentLength() {
String contentLengthString = responseHeaders.getFirst(Headers.CONTENT_LENGTH);
if (contentLengthString == null) {
return -1;
}
return Long.parseLong(contentLengthString);
}
/**
* Sets the response content length
*
* @param length The content length
*/
public HttpServerExchange setResponseContentLength(long length) {
if (length == -1) {
responseHeaders.remove(Headers.CONTENT_LENGTH);
} else {
responseHeaders.put(Headers.CONTENT_LENGTH, Long.toString(length));
}
return this;
}
/**
* Returns a mutable map of query parameters.
*
* @return The query parameters
*/
public Map<String, Deque<String>> getQueryParameters() {
if (queryParameters == null) {
queryParameters = new TreeMap<>();
}
return queryParameters;
}
public HttpServerExchange addQueryParam(final String name, final String param) {
if (queryParameters == null) {
queryParameters = new TreeMap<>();
}
Deque<String> list = queryParameters.get(name);
if (list == null) {
queryParameters.put(name, list = new ArrayDeque<>(2));
}
list.add(param);
return this;
}
/**
* Returns a mutable map of path parameters
*
* @return The path parameters
*/
public Map<String, Deque<String>> getPathParameters() {
if (pathParameters == null) {
pathParameters = new TreeMap<>();
}
return pathParameters;
}
public HttpServerExchange addPathParam(final String name, final String param) {
if (pathParameters == null) {
pathParameters = new TreeMap<>();
}
Deque<String> list = pathParameters.get(name);
if (list == null) {
pathParameters.put(name, list = new ArrayDeque<>(2));
}
list.add(param);
return this;
}
/**
* @return A mutable map of request cookies
* @deprecated use either {@link #requestCookies()} or {@link #getRequestCookie(String)} or {@link #setRequestCookie(Cookie)} methods instead
*/
@Deprecated(since="2.2.0", forRemoval=true)
public Map<String, Cookie> getRequestCookies() {
if (deprecatedRequestCookies == null) {
deprecatedRequestCookies = new MapDelegatingToSet((Set<Cookie>)((DelegatingIterable<Cookie>)requestCookies()).getDelegate());
}
return deprecatedRequestCookies;
}
/**
* Sets a request cookie
*
* @param cookie The cookie
*/
public HttpServerExchange setRequestCookie(final Cookie cookie) {
if (cookie == null) return this;
if (getConnection().getUndertowOptions().get(UndertowOptions.ENABLE_RFC6265_COOKIE_VALIDATION, UndertowOptions.DEFAULT_ENABLE_RFC6265_COOKIE_VALIDATION)) {
if (cookie.getValue() != null && !cookie.getValue().isEmpty()) {
Rfc6265CookieSupport.validateCookieValue(cookie.getValue());
}
if (cookie.getPath() != null && !cookie.getPath().isEmpty()) {
Rfc6265CookieSupport.validatePath(cookie.getPath());
}
if (cookie.getDomain() != null && !cookie.getDomain().isEmpty()) {
Rfc6265CookieSupport.validateDomain(cookie.getDomain());
}
}
((Set<Cookie>)((DelegatingIterable<Cookie>)requestCookies()).getDelegate()).add(cookie);
return this;
}
public Cookie getRequestCookie(final String name) {
if (name == null) return null;
for (Cookie cookie : requestCookies()) {
if (name.equals(cookie.getName())) {
// TODO: QUESTION: Shouldn't we check instead of just name also
// TODO requestPath (stored in this exchange request path) and
// TODO: domain (stored in Host HTTP header).
return cookie;
}
}
return null;
}
/**
* Returns unmodifiable enumeration of request cookies.
* @return A read-only enumeration of request cookies
*/
public Iterable<Cookie> requestCookies() {
if (requestCookies == null) {
Set<Cookie> requestCookiesParam = new OverridableTreeSet<>();
requestCookies = new DelegatingIterable<>(requestCookiesParam);
Cookies.parseRequestCookies(
getConnection().getUndertowOptions().get(UndertowOptions.MAX_COOKIES, UndertowOptions.DEFAULT_MAX_COOKIES),
getConnection().getUndertowOptions().get(UndertowOptions.ALLOW_EQUALS_IN_COOKIE_VALUE, false),
requestHeaders.get(Headers.COOKIE), requestCookiesParam, getConnection().getUndertowOptions().get(UndertowOptions.DISABLE_RFC6265_COOKIE_PARSING, UndertowOptions.DEFAULT_DISABLE_RFC6265_COOKIE_PARSING));
}
return requestCookies;
}
/**
* Sets a response cookie
*
* @param cookie The cookie
*/
public HttpServerExchange setResponseCookie(final Cookie cookie) {
if (cookie == null) return this;
if (getConnection().getUndertowOptions().get(UndertowOptions.ENABLE_RFC6265_COOKIE_VALIDATION, UndertowOptions.DEFAULT_ENABLE_RFC6265_COOKIE_VALIDATION)) {
if (cookie.getValue() != null && !cookie.getValue().isEmpty()) {
Rfc6265CookieSupport.validateCookieValue(cookie.getValue());
}
if (cookie.getPath() != null && !cookie.getPath().isEmpty()) {
Rfc6265CookieSupport.validatePath(cookie.getPath());
}
if (cookie.getDomain() != null && !cookie.getDomain().isEmpty()) {
Rfc6265CookieSupport.validateDomain(cookie.getDomain());
}
}
((Set<Cookie>)((DelegatingIterable<Cookie>)responseCookies()).getDelegate()).add(cookie);
return this;
}
/**
* @return A mutable map of response cookies
* @deprecated use either {@link #responseCookies()} or {@link #setResponseCookie(Cookie)} methods instead
*/
@Deprecated(since="2.2.0", forRemoval=true)
public Map<String, Cookie> getResponseCookies() {
if (deprecatedResponseCookies == null) {
deprecatedResponseCookies = new MapDelegatingToSet((Set<Cookie>)((DelegatingIterable<Cookie>)responseCookies()).getDelegate());
}
return deprecatedResponseCookies;
}
/**
* Returns unmodifiable enumeration of response cookies.
* @return A read-only enumeration of response cookies
*/
public Iterable<Cookie> responseCookies() {
if (responseCookies == null) {
responseCookies = new DelegatingIterable<>(new OverridableTreeSet<>());
}
return responseCookies;
}
/**
* @return <code>true</code> If the response has already been started
*/
public boolean isResponseStarted() {
return allAreSet(state, FLAG_RESPONSE_SENT);
}
/**
* Get the inbound request. If there is no request body, calling this method
* may cause the next request to immediately be processed. The {@link StreamSourceChannel#close()} or {@link StreamSourceChannel#shutdownReads()}
* method must be called at some point after the request is processed to prevent resource leakage and to allow
* the next request to proceed. Any unread content will be discarded.
*
* @return the channel for the inbound request, or {@code null} if another party already acquired the channel
*/
public StreamSourceChannel getRequestChannel() {
if (requestChannel != null) {
if(anyAreSet(state, FLAG_REQUEST_RESET)) {
clearFlags(FLAG_REQUEST_RESET);
return requestChannel;
}
return null;
}
if (anyAreSet(state, FLAG_REQUEST_TERMINATED)) {
return requestChannel = new ReadDispatchChannel(new ConduitStreamSourceChannel(Configurable.EMPTY, new EmptyStreamSourceConduit(getIoThread())));
}
final ConduitWrapper<StreamSourceConduit>[] wrappers = this.requestWrappers;
final ConduitStreamSourceChannel sourceChannel = connection.getSourceChannel();
if (wrappers != null) {
this.requestWrappers = null;
final WrapperConduitFactory<StreamSourceConduit> factory = new WrapperConduitFactory<>(wrappers, requestWrapperCount, sourceChannel.getConduit(), this);
sourceChannel.setConduit(factory.create());
}
return requestChannel = new ReadDispatchChannel(sourceChannel);
}
void resetRequestChannel() {
setFlags(FLAG_REQUEST_RESET);
}
public boolean isRequestChannelAvailable() {
return requestChannel == null || anyAreSet(state, FLAG_REQUEST_RESET);
}
/**
* Returns true if the completion handler for this exchange has been invoked, and the request is considered
* finished.
*/
public boolean isComplete() {
return allAreSet(state, FLAG_REQUEST_TERMINATED | FLAG_RESPONSE_TERMINATED);
}
/**
* Returns true if all data has been read from the request, or if there
* was not data.
*
* @return true if the request is complete
*/
public boolean isRequestComplete() {
PooledByteBuffer[] data = getAttachment(BUFFERED_REQUEST_DATA);
if(data != null) {
return false;
}
return allAreSet(state, FLAG_REQUEST_TERMINATED);
}
/**
* @return true if the responses is complete
*/
public boolean isResponseComplete() {
return allAreSet(state, FLAG_RESPONSE_TERMINATED);
}
/**
* Force the codec to treat the request as fully read. Should only be invoked by handlers which downgrade
* the socket or implement a transfer coding.
*/
void terminateRequest() {
if (allAreSet(state, FLAG_REQUEST_TERMINATED)) {
// idempotent
return;
}
if (requestChannel != null) {
requestChannel.suspendReads();
requestChannel.requestDone();
}
setFlags(FLAG_REQUEST_TERMINATED);
if (anyAreSet(state, FLAG_RESPONSE_TERMINATED)) {
invokeExchangeCompleteListeners();
}
}
private void invokeExchangeCompleteListeners() {
if (exchangeCompletionListenersCount > 0) {
int i = exchangeCompletionListenersCount - 1;
ExchangeCompletionListener next = exchangeCompleteListeners[i];
exchangeCompletionListenersCount = -1;
next.exchangeEvent(this, new ExchangeCompleteNextListener(exchangeCompleteListeners, this, i));
} else if (exchangeCompletionListenersCount == 0) {
exchangeCompletionListenersCount = -1;
connection.exchangeComplete(this);
}
}
/**
* Get the response channel. The channel must be closed and fully flushed before the next response can be started.
* In order to close the channel you must first call {@link org.xnio.channels.StreamSinkChannel#shutdownWrites()},
* and then call {@link org.xnio.channels.StreamSinkChannel#flush()} until it returns true. Alternatively you can
* call {@link #endExchange()}, which will close the channel as part of its cleanup.
* <p>
* Closing a fixed-length response before the corresponding number of bytes has been written will cause the connection
* to be reset and subsequent requests to fail; thus it is important to ensure that the proper content length is
* delivered when one is specified. The response channel may not be writable until after the response headers have
* been sent.
* <p>
* If this method is not called then an empty or default response body will be used, depending on the response code set.
* <p>
* The returned channel will begin to write out headers when the first write request is initiated, or when
* {@link org.xnio.channels.StreamSinkChannel#shutdownWrites()} is called on the channel with no content being written.
* Once the channel is acquired, however, the response code and headers may not be modified.
* <p>
*
* @return the response channel, or {@code null} if another party already acquired the channel
*/
public StreamSinkChannel getResponseChannel() {
if (responseChannel != null) {
return null;
}
final ConduitWrapper<StreamSinkConduit>[] wrappers = responseWrappers;
this.responseWrappers = null;
final ConduitStreamSinkChannel sinkChannel = connection.getSinkChannel();
if (sinkChannel == null) {
return null;
}
if(wrappers != null) {
final WrapperStreamSinkConduitFactory factory = new WrapperStreamSinkConduitFactory(wrappers, responseWrapperCount, this, sinkChannel.getConduit());
sinkChannel.setConduit(factory.create());
} else {
sinkChannel.setConduit(connection.getSinkConduit(this, sinkChannel.getConduit()));
}
this.responseChannel = new WriteDispatchChannel(sinkChannel);
this.startResponse();
return responseChannel;
}
/**
* Get the response sender.
* <p>
* For blocking exchanges this will return a sender that uses the underlying output stream.
*
* @return the response sender, or {@code null} if another party already acquired the channel or the sender
* @see #getResponseChannel()
*/
public Sender getResponseSender() {
if (blockingHttpExchange != null) {
return blockingHttpExchange.getSender();
}
if (sender != null) {
return sender;
}
return sender = new AsyncSenderImpl(this);
}
public Receiver getRequestReceiver() {
if(blockingHttpExchange != null) {
return blockingHttpExchange.getReceiver();
}
if(receiver != null) {
return receiver;
}
return receiver = new AsyncReceiverImpl(this);
}
/**
* @return <code>true</code> if {@link #getResponseChannel()} has not been called
*/
public boolean isResponseChannelAvailable() {
return responseChannel == null;
}
/**
* Get the status code.
*
* @see #getStatusCode()
* @return the status code
*/
@Deprecated
public int getResponseCode() {
return state & MASK_RESPONSE_CODE;
}
/**
* Change the status code for this response. If not specified, the code will be a {@code 200}. Setting
* the status code after the response headers have been transmitted has no effect.
*
* @see #setStatusCode(int)
* @param statusCode the new code
* @throws IllegalStateException if a response or upgrade was already sent
*/
@Deprecated
public HttpServerExchange setResponseCode(final int statusCode) {
return setStatusCode(statusCode);
}
/**
* Get the status code.
*
* @return the status code
*/
public int getStatusCode() {
return state & MASK_RESPONSE_CODE;
}
/**
* Change the status code for this response. If not specified, the code will be a {@code 200}. Setting
* the status code after the response headers have been transmitted has no effect.
*
* @param statusCode the new code
* @throws IllegalStateException if a response or upgrade was already sent
*/
public HttpServerExchange setStatusCode(final int statusCode) {
if (statusCode < 0 || statusCode > 999) {
throw new IllegalArgumentException("Invalid response code");
}
if (allAreSet(state, FLAG_RESPONSE_SENT)) {
throw UndertowMessages.MESSAGES.responseAlreadyStarted();
}
if(statusCode >= 500) {
if(UndertowLogger.ERROR_RESPONSE.isDebugEnabled()) {
UndertowLogger.ERROR_RESPONSE.debugf(new RuntimeException(), "Setting error code %s for exchange %s", statusCode, this);
}
}
clearFlags(MASK_RESPONSE_CODE);
setFlags(statusCode & MASK_RESPONSE_CODE);
return this;
}
/**
* Sets the HTTP reason phrase. Depending on the protocol this may or may not be honoured. In particular HTTP2
* has removed support for the reason phrase.
*
* This method should only be used to interact with legacy frameworks that give special meaning to the reason phrase.
*
* @param message The status message
* @return this exchange
*/
public HttpServerExchange setReasonPhrase(String message) {
putAttachment(REASON_PHRASE, message);
return this;
}
/**
*
* @return The current reason phrase
*/
public String getReasonPhrase() {
return getAttachment(REASON_PHRASE);
}
/**
* Adds a {@link ConduitWrapper} to the request wrapper chain.
*
* @param wrapper the wrapper
*/
public HttpServerExchange addRequestWrapper(final ConduitWrapper<StreamSourceConduit> wrapper) {
ConduitWrapper<StreamSourceConduit>[] wrappers = requestWrappers;
if (requestChannel != null) {
throw UndertowMessages.MESSAGES.requestChannelAlreadyProvided();
}
if (wrappers == null) {
wrappers = requestWrappers = new ConduitWrapper[2];
} else if (wrappers.length == requestWrapperCount) {
requestWrappers = new ConduitWrapper[wrappers.length + 2];
System.arraycopy(wrappers, 0, requestWrappers, 0, wrappers.length);
wrappers = requestWrappers;
}
wrappers[requestWrapperCount++] = wrapper;
return this;
}
/**
* Adds a {@link ConduitWrapper} to the response wrapper chain.
*
* @param wrapper the wrapper
*/
public HttpServerExchange addResponseWrapper(final ConduitWrapper<StreamSinkConduit> wrapper) {
ConduitWrapper<StreamSinkConduit>[] wrappers = responseWrappers;
if (responseChannel != null) {
throw UndertowMessages.MESSAGES.responseChannelAlreadyProvided();
}
if(wrappers == null) {
this.responseWrappers = wrappers = new ConduitWrapper[2];
} else if (wrappers.length == responseWrapperCount) {
responseWrappers = new ConduitWrapper[wrappers.length + 2];
System.arraycopy(wrappers, 0, responseWrappers, 0, wrappers.length);
wrappers = responseWrappers;
}
wrappers[responseWrapperCount++] = wrapper;
return this;
}
/**
* Calling this method puts the exchange in blocking mode, and creates a
* {@link BlockingHttpExchange} object to store the streams.
* <p>
* When an exchange is in blocking mode the input stream methods become
* available, other than that there is presently no major difference
* between blocking an non-blocking modes.
*
* @return The existing blocking exchange, if any
*/
public BlockingHttpExchange startBlocking() {
final BlockingHttpExchange old = this.blockingHttpExchange;
blockingHttpExchange = new DefaultBlockingHttpExchange(this);
return old;
}
/**
* Calling this method puts the exchange in blocking mode, using the given
* blocking exchange as the source of the streams.
* <p>
* When an exchange is in blocking mode the input stream methods become
* available, other than that there is presently no major difference
* between blocking an non-blocking modes.
* <p>
* Note that this method may be called multiple times with different
* exchange objects, to allow handlers to modify the streams
* that are being used.
*
* @return The existing blocking exchange, if any
*/
public BlockingHttpExchange startBlocking(final BlockingHttpExchange httpExchange) {
final BlockingHttpExchange old = this.blockingHttpExchange;
blockingHttpExchange = httpExchange;
return old;
}
/**
* Returns true if {@link #startBlocking()} or {@link #startBlocking(BlockingHttpExchange)} has been called.
*
* @return <code>true</code> If this is a blocking HTTP server exchange
*/
public boolean isBlocking() {
return blockingHttpExchange != null;
}
/**
* @return The input stream
* @throws IllegalStateException if {@link #startBlocking()} has not been called
*/
public InputStream getInputStream() {
if (blockingHttpExchange == null) {
throw UndertowMessages.MESSAGES.startBlockingHasNotBeenCalled();
}
return blockingHttpExchange.getInputStream();
}
/**
* @return The output stream
* @throws IllegalStateException if {@link #startBlocking()} has not been called
*/
public OutputStream getOutputStream() {
if (blockingHttpExchange == null) {
throw UndertowMessages.MESSAGES.startBlockingHasNotBeenCalled();
}
return blockingHttpExchange.getOutputStream();
}
/**
* Force the codec to treat the response as fully written. Should only be invoked by handlers which downgrade
* the socket or implement a transfer coding.
*/
HttpServerExchange terminateResponse() {
if (allAreSet(state, FLAG_RESPONSE_TERMINATED)) {
// idempotent
return this;
}
if(responseChannel != null) {
responseChannel.suspendWrites();
responseChannel.responseDone();
}
setFlags(FLAG_RESPONSE_TERMINATED);
if (anyAreSet(state, FLAG_REQUEST_TERMINATED)) {
invokeExchangeCompleteListeners();
}
return this;
}
/**
* @return The request start time using the JVM's high-resolution time source,
* in nanoseconds, or -1 if this was not recorded
* @see UndertowOptions#RECORD_REQUEST_START_TIME
* @see Connectors#setRequestStartTime(HttpServerExchange)
*/
public long getRequestStartTime() {
return requestStartTime;
}
HttpServerExchange setRequestStartTime(long requestStartTime) {
this.requestStartTime = requestStartTime;
return this;
}
/**
* Ends the exchange by fully draining the request channel, and flushing the response channel.
* <p>
* This can result in handoff to an XNIO worker, so after this method is called the exchange should
* not be modified by the caller.
* <p>
* If the exchange is already complete this method is a noop
*/
public HttpServerExchange endExchange() {
final int state = this.state;
if (allAreSet(state, FLAG_REQUEST_TERMINATED | FLAG_RESPONSE_TERMINATED)) {
if(blockingHttpExchange != null) {
//we still have to close the blocking exchange in this case,
IoUtils.safeClose(blockingHttpExchange);
}
return this;
}
if(defaultResponseListeners != null) {
int i = defaultResponseListeners.length - 1;
while (i >= 0) {
DefaultResponseListener listener = defaultResponseListeners[i];
if (listener != null) {
defaultResponseListeners[i] = null;
try {
if (listener.handleDefaultResponse(this)) {
return this;
}
} catch (Throwable e) {
UndertowLogger.REQUEST_LOGGER.debug("Exception running default response listener", e);
}
}
i--;
}
}
if (anyAreClear(state, FLAG_REQUEST_TERMINATED)) {
connection.terminateRequestChannel(this);
}
if (blockingHttpExchange != null) {
try {
//TODO: can we end up in this situation in a IO thread?
blockingHttpExchange.close();
} catch (IOException e) {
UndertowLogger.REQUEST_IO_LOGGER.ioException(e);
IoUtils.safeClose(connection);
} catch (Throwable t) {
UndertowLogger.REQUEST_IO_LOGGER.handleUnexpectedFailure(t);
IoUtils.safeClose(connection);
}
}
//417 means that we are rejecting the request
//so the client should not actually send any data
if (anyAreClear(state, FLAG_REQUEST_TERMINATED)) {
//not really sure what the best thing to do here is
//for now we are just going to drain the channel
if (requestChannel == null) {
getRequestChannel();
}
int totalRead = 0;
for (; ; ) {
try {
long read = Channels.drain(requestChannel, Long.MAX_VALUE);
totalRead += read;
if (read == 0) {
//if the response code is 417 this is a rejected continuation request.
//however there is a chance the client could have sent the data anyway
//so we attempt to drain, and if we have not drained anything then we
//assume the server has not sent any data
if (getStatusCode() != StatusCodes.EXPECTATION_FAILED || totalRead > 0) {
requestChannel.getReadSetter().set(ChannelListeners.drainListener(Long.MAX_VALUE,
new ChannelListener<StreamSourceChannel>() {
@Override
public void handleEvent(final StreamSourceChannel channel) {
if (anyAreClear(state, FLAG_RESPONSE_TERMINATED)) {
closeAndFlushResponse();
}
}
}, new ChannelExceptionHandler<StreamSourceChannel>() {
@Override
public void handleException(final StreamSourceChannel channel, final IOException e) {
//make sure the listeners have been invoked
//unless the connection has been killed this is a no-op
terminateRequest();
terminateResponse();
UndertowLogger.REQUEST_LOGGER.debug("Exception draining request stream", e);
IoUtils.safeClose(connection);
}
}
));
requestChannel.resumeReads();
return this;
} else {
break;
}
} else if (read == -1) {
break;
}
} catch (Throwable t) {
if (t instanceof IOException) {
UndertowLogger.REQUEST_IO_LOGGER.ioException((IOException) t);
} else {
UndertowLogger.REQUEST_IO_LOGGER.handleUnexpectedFailure(t);
}
invokeExchangeCompleteListeners();
IoUtils.safeClose(connection);
return this;
}
}
}
if (anyAreClear(state, FLAG_RESPONSE_TERMINATED)) {
closeAndFlushResponse();
}
return this;
}
private void closeAndFlushResponse() {
if(!connection.isOpen()) {
//not much point trying to flush
//make sure the listeners have been invoked
terminateRequest();
terminateResponse();
return;
}
try {
if (isResponseChannelAvailable()) {
if(!getRequestMethod().equals(Methods.CONNECT) && !(getRequestMethod().equals(Methods.HEAD) && getResponseHeaders().contains(Headers.CONTENT_LENGTH)) && Connectors.isEntityBodyAllowed(this)) {
//according to
getResponseHeaders().put(Headers.CONTENT_LENGTH, "0");
}
getResponseChannel();
} else if (anyAreClear(state, FLAG_RESPONSE_TERMINATED) && !responseChannel.isOpen()) {
// UNDERTOW-1664: Http/2 response channels may be closed prior to the connection. There's
// no reason to attempt to flush a response for a closed channel but we must ensure
// the listeners have been invoked.
invokeExchangeCompleteListeners();
IoUtils.safeClose(connection);
return;
}
responseChannel.shutdownWrites();
if (!responseChannel.flush()) {
responseChannel.getWriteSetter().set(ChannelListeners.flushingChannelListener(
new ChannelListener<StreamSinkChannel>() {
@Override
public void handleEvent(final StreamSinkChannel channel) {
channel.suspendWrites();
channel.getWriteSetter().set(null);
//defensive programming, should never happen
if (anyAreClear(state, FLAG_RESPONSE_TERMINATED)) {
//make sure the listeners have been invoked
invokeExchangeCompleteListeners();
UndertowLogger.ROOT_LOGGER.responseWasNotTerminated(connection, HttpServerExchange.this);
IoUtils.safeClose(connection);
}
}
}, new ChannelExceptionHandler<Channel>() {
@Override
public void handleException(final Channel channel, final IOException exception) {
//make sure the listeners have been invoked
invokeExchangeCompleteListeners();
UndertowLogger.REQUEST_LOGGER.debug("Exception ending request", exception);
IoUtils.safeClose(connection);
}
}
));
responseChannel.resumeWrites();
} else {
//defensive programming, should never happen
if (anyAreClear(state, FLAG_RESPONSE_TERMINATED)) {
//make sure the listeners have been invoked
invokeExchangeCompleteListeners();
UndertowLogger.ROOT_LOGGER.responseWasNotTerminated(connection, this);
IoUtils.safeClose(connection);
}
}
} catch (Throwable t) {
if (t instanceof IOException) {
UndertowLogger.REQUEST_IO_LOGGER.ioException((IOException) t);
} else {
UndertowLogger.REQUEST_IO_LOGGER.handleUnexpectedFailure(t);
}
invokeExchangeCompleteListeners();
IoUtils.safeClose(connection);
}
}
/**
* Transmit the response headers. After this method successfully returns,
* the response channel may become writable.
* <p>
* If this method fails the request and response channels will be closed.
* <p>
* This method runs asynchronously. If the channel is writable it will
* attempt to write as much of the response header as possible, and then
* queue the rest in a listener and return.
* <p>
* If future handlers in the chain attempt to write before this is finished
* XNIO will just magically sort it out so it works. This is not actually
* implemented yet, so we just terminate the connection straight away at
* the moment.
* <p>
* TODO: make this work properly
*
* @throws IllegalStateException if the response headers were already sent
*/
HttpServerExchange startResponse() throws IllegalStateException {
if (allAreSet(state, FLAG_RESPONSE_SENT)) {
throw UndertowMessages.MESSAGES.responseAlreadyStarted();
}
setFlags(FLAG_RESPONSE_SENT);
log.tracef("Starting to write response for %s", this);
return this;
}
public XnioIoThread getIoThread() {
return connection.getIoThread();
}
public boolean isMultiPartExchange() {
//NOTE: should this include Range response?
final HeaderValues contentTypeHeaders = getRequestHeaders().get("Content-Type");
if(contentTypeHeaders != null && contentTypeHeaders.size() >0) {
return contentTypeHeaders.getFirst().startsWith("multipart");
} else {
return false;
}
}
/**
* @return The maximum entity size for this exchange
*/
public long getMaxEntitySize() {
return maxEntitySize;
}
/**
* Sets the max entity size for this exchange. This cannot be modified after the request channel has been obtained.
*
* @param maxEntitySize The max entity size
*/
public HttpServerExchange setMaxEntitySize(final long maxEntitySize) {
if (!isRequestChannelAvailable()) {
throw UndertowMessages.MESSAGES.requestChannelAlreadyProvided();
}
this.maxEntitySize = maxEntitySize;
connection.maxEntitySizeUpdated(this);
return this;
}
public SecurityContext getSecurityContext() {
return securityContext;
}
@SuppressWarnings("removal")
public void setSecurityContext(SecurityContext securityContext) {
SecurityManager sm = System.getSecurityManager();
if(sm != null) {
sm.checkPermission(SET_SECURITY_CONTEXT);
}
this.securityContext = securityContext;
}
/**
* Adds a listener that will be invoked on response commit
*
* @param listener The response listener
*/
public void addResponseCommitListener(final ResponseCommitListener listener) {
//technically it is possible to modify the exchange after the response conduit has been created
//as the response channel should not be retrieved until it is about to be written to
//if we get complaints about this we can add support for it, however it makes the exchange bigger and the connectors more complex
addResponseWrapper(new ConduitWrapper<StreamSinkConduit>() {
@Override
public StreamSinkConduit wrap(ConduitFactory<StreamSinkConduit> factory, HttpServerExchange exchange) {
listener.beforeCommit(exchange);
return factory.create();
}
});
}
/**
* Actually resumes reads or writes, if the relevant method has been called.
*
* @return <code>true</code> if reads or writes were resumed
*/
boolean runResumeReadWrite() {
boolean ret = false;
if(anyAreSet(state, FLAG_SHOULD_RESUME_WRITES)) {
responseChannel.runResume();
ret = true;
}
if(anyAreSet(state, FLAG_SHOULD_RESUME_READS)) {
requestChannel.runResume();
ret = true;
}
return ret;
}
boolean isResumed() {
return anyAreSet(state, FLAG_SHOULD_RESUME_WRITES | FLAG_SHOULD_RESUME_READS);
}
private static class ExchangeCompleteNextListener implements ExchangeCompletionListener.NextListener {
private final ExchangeCompletionListener[] list;
private final HttpServerExchange exchange;
private int i;
ExchangeCompleteNextListener(final ExchangeCompletionListener[] list, final HttpServerExchange exchange, int i) {
this.list = list;
this.exchange = exchange;
this.i = i;
}
@Override
public void proceed() {
if (--i >= 0) {
final ExchangeCompletionListener next = list[i];
next.exchangeEvent(exchange, this);
} else if(i == -1) {
exchange.connection.exchangeComplete(exchange);
}
}
}
private static class DefaultBlockingHttpExchange implements BlockingHttpExchange {
private InputStream inputStream;
private UndertowOutputStream outputStream;
private Sender sender;
private final HttpServerExchange exchange;
DefaultBlockingHttpExchange(final HttpServerExchange exchange) {
this.exchange = exchange;
}
public InputStream getInputStream() {
if (inputStream == null) {
inputStream = new UndertowInputStream(exchange);
}
return inputStream;
}
public UndertowOutputStream getOutputStream() {
if (outputStream == null) {
outputStream = new UndertowOutputStream(exchange);
}
return outputStream;
}
@Override
public Sender getSender() {
if (sender == null) {
sender = new BlockingSenderImpl(exchange, getOutputStream());
}
return sender;
}
@Override
public void close() throws IOException {
try {
// close the input stream if open or force closing if the request is incomplete
if (inputStream != null || !exchange.isRequestComplete()) {
getInputStream().close();
}
} finally {
// same for the output stream
if (outputStream != null || !exchange.isResponseComplete()) {
getOutputStream().close();
}
}
}
@Override
public Receiver getReceiver() {
return new BlockingReceiverImpl(exchange, getInputStream());
}
}
/**
* Channel implementation that is actually provided to clients of the exchange.
* <p>
* We do not provide the underlying conduit channel, as this is shared between requests, so we need to make sure that after this request
* is done the the channel cannot affect the next request.
* <p>
* It also delays a wakeup/resumesWrites calls until the current call stack has returned, thus ensuring that only 1 thread is
* active in the exchange at any one time.
*/
private class WriteDispatchChannel extends DetachableStreamSinkChannel implements StreamSinkChannel {
private boolean wakeup;
WriteDispatchChannel(final ConduitStreamSinkChannel delegate) {
super(delegate);
}
@Override
protected boolean isFinished() {
return allAreSet(state, FLAG_RESPONSE_TERMINATED);
}
@Override
public void resumeWrites() {
if (isInCall()) {
setFlags(FLAG_SHOULD_RESUME_WRITES);
if(anyAreSet(state, FLAG_DISPATCHED)) {
throw UndertowMessages.MESSAGES.resumedAndDispatched();
}
} else if(!isFinished()){
delegate.resumeWrites();
}
}
@Override
public void suspendWrites() {
clearFlags(FLAG_SHOULD_RESUME_WRITES);
super.suspendWrites();
}
@Override
public void wakeupWrites() {
if (isFinished()) {
return;
}
if (isInCall()) {
wakeup = true;
setFlags(FLAG_SHOULD_RESUME_WRITES);
if(anyAreSet(state, FLAG_DISPATCHED)) {
throw UndertowMessages.MESSAGES.resumedAndDispatched();
}
} else {
delegate.wakeupWrites();
}
}
@Override
public boolean isWriteResumed() {
return anyAreSet(state, FLAG_SHOULD_RESUME_WRITES) || super.isWriteResumed();
}
public void runResume() {
if (isWriteResumed()) {
if(isFinished()) {
invokeListener();
} else {
if (wakeup) {
wakeup = false;
clearFlags(FLAG_SHOULD_RESUME_WRITES);
delegate.wakeupWrites();
} else {
clearFlags(FLAG_SHOULD_RESUME_WRITES);
delegate.resumeWrites();
}
}
} else if(wakeup) {
wakeup = false;
invokeListener();
}
}
private void invokeListener() {
if(writeSetter != null) {
super.getIoThread().execute(new Runnable() {
@Override
public void run() {
ChannelListeners.invokeChannelListener(WriteDispatchChannel.this, writeSetter.get());
}
});
}
}
@Override
public void awaitWritable() throws IOException {
if(Thread.currentThread() == super.getIoThread()) {
throw UndertowMessages.MESSAGES.awaitCalledFromIoThread();
}
super.awaitWritable();
}
@Override
public void awaitWritable(long time, TimeUnit timeUnit) throws IOException {
if(Thread.currentThread() == super.getIoThread()) {
throw UndertowMessages.MESSAGES.awaitCalledFromIoThread();
}
super.awaitWritable(time, timeUnit);
}
@Override
public long transferFrom(FileChannel src, long position, long count) throws IOException {
long l = super.transferFrom(src, position, count);
if(l > 0) {
responseBytesSent += l;
}
return l;
}
@Override
public long transferFrom(StreamSourceChannel source, long count, ByteBuffer throughBuffer) throws IOException {
long l = super.transferFrom(source, count, throughBuffer);
if(l > 0) {
responseBytesSent += l;
}
return l;
}
@Override
public long write(ByteBuffer[] srcs, int offset, int length) throws IOException {
long l = super.write(srcs, offset, length);
responseBytesSent += l;
return l;
}
@Override
public long write(ByteBuffer[] srcs) throws IOException {
long l = super.write(srcs);
responseBytesSent += l;
return l;
}
@Override
public int writeFinal(ByteBuffer src) throws IOException {
int l = super.writeFinal(src);
responseBytesSent += l;
return l;
}
@Override
public long writeFinal(ByteBuffer[] srcs, int offset, int length) throws IOException {
long l = super.writeFinal(srcs, offset, length);
responseBytesSent += l;
return l;
}
@Override
public long writeFinal(ByteBuffer[] srcs) throws IOException {
long l = super.writeFinal(srcs);
responseBytesSent += l;
return l;
}
@Override
public int write(ByteBuffer src) throws IOException {
int l = super.write(src);
responseBytesSent += l;
return l;
}
}
/**
* Channel implementation that is actually provided to clients of the exchange. We do not provide the underlying
* conduit channel, as this will become the next requests conduit channel, so if a thread is still hanging onto this
* exchange it can result in problems.
* <p>
* It also delays a readResume call until the current call stack has returned, thus ensuring that only 1 thread is
* active in the exchange at any one time.
* <p>
* It also handles buffered request data.
*/
private final class ReadDispatchChannel extends DetachableStreamSourceChannel implements StreamSourceChannel {
private boolean wakeup = true;
private boolean readsResumed = false;
ReadDispatchChannel(final ConduitStreamSourceChannel delegate) {
super(delegate);
}
@Override
protected boolean isFinished() {
return allAreSet(state, FLAG_REQUEST_TERMINATED);
}
@Override
public void resumeReads() {
readsResumed = true;
if (isInCall()) {
setFlags(FLAG_SHOULD_RESUME_READS);
if(anyAreSet(state, FLAG_DISPATCHED)) {
throw UndertowMessages.MESSAGES.resumedAndDispatched();
}
} else if (!isFinished()) {
delegate.resumeReads();
}
}
public void wakeupReads() {
if (isInCall()) {
wakeup = true;
setFlags(FLAG_SHOULD_RESUME_READS);
if(anyAreSet(state, FLAG_DISPATCHED)) {
throw UndertowMessages.MESSAGES.resumedAndDispatched();
}
} else {
if(isFinished()) {
invokeListener();
} else {
delegate.wakeupReads();
}
}
}
private void invokeListener() {
if(readSetter != null) {
super.getIoThread().execute(new Runnable() {
@Override
public void run() {
ChannelListeners.invokeChannelListener(ReadDispatchChannel.this, readSetter.get());
}
});
}
}
public void requestDone() {
if(delegate instanceof ConduitStreamSourceChannel) {
((ConduitStreamSourceChannel)delegate).setReadListener(null);
((ConduitStreamSourceChannel)delegate).setCloseListener(null);
} else {
delegate.getReadSetter().set(null);
delegate.getCloseSetter().set(null);
}
}
@Override
public long transferTo(long position, long count, FileChannel target) throws IOException {
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered == null) {
return super.transferTo(position, count, target);
}
return target.transferFrom(this, position, count);
}
@Override
public void awaitReadable() throws IOException {
if(Thread.currentThread() == super.getIoThread()) {
throw UndertowMessages.MESSAGES.awaitCalledFromIoThread();
}
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered == null) {
super.awaitReadable();
}
}
@Override
public void suspendReads() {
readsResumed = false;
clearFlags(FLAG_SHOULD_RESUME_READS);
super.suspendReads();
}
@Override
public long transferTo(long count, ByteBuffer throughBuffer, StreamSinkChannel target) throws IOException {
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered == null) {
return super.transferTo(count, throughBuffer, target);
}
//make sure there is no garbage in throughBuffer
throughBuffer.position(0);
throughBuffer.limit(0);
long copied = 0;
for (int i = 0; i < buffered.length; ++i) {
PooledByteBuffer pooled = buffered[i];
if (pooled != null) {
final ByteBuffer buf = pooled.getBuffer();
if (buf.hasRemaining()) {
int res = target.write(buf);
if (!buf.hasRemaining()) {
pooled.close();
buffered[i] = null;
}
if (res == 0) {
return copied;
} else {
copied += res;
}
} else {
pooled.close();
buffered[i] = null;
}
}
}
removeAttachment(BUFFERED_REQUEST_DATA);
if (copied == 0) {
return super.transferTo(count, throughBuffer, target);
} else {
return copied;
}
}
@Override
public void awaitReadable(long time, TimeUnit timeUnit) throws IOException {
if(Thread.currentThread() == super.getIoThread()) {
throw UndertowMessages.MESSAGES.awaitCalledFromIoThread();
}
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered == null) {
super.awaitReadable(time, timeUnit);
}
}
@Override
public long read(ByteBuffer[] dsts, int offset, int length) throws IOException {
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered == null) {
return super.read(dsts, offset, length);
}
long copied = 0;
for (int i = 0; i < buffered.length; ++i) {
PooledByteBuffer pooled = buffered[i];
if (pooled != null) {
final ByteBuffer buf = pooled.getBuffer();
if (buf.hasRemaining()) {
copied += Buffers.copy(dsts, offset, length, buf);
if (!buf.hasRemaining()) {
pooled.close();
buffered[i] = null;
}
if (!Buffers.hasRemaining(dsts, offset, length)) {
return copied;
}
} else {
pooled.close();
buffered[i] = null;
}
}
}
removeAttachment(BUFFERED_REQUEST_DATA);
if (copied == 0) {
return super.read(dsts, offset, length);
} else {
return copied;
}
}
@Override
public long read(ByteBuffer[] dsts) throws IOException {
return read(dsts, 0, dsts.length);
}
@Override
public boolean isOpen() {
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered != null) {
return true;
}
return super.isOpen();
}
@Override
public void close() throws IOException {
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered != null) {
for (PooledByteBuffer pooled : buffered) {
if (pooled != null) {
pooled.close();
}
}
}
removeAttachment(BUFFERED_REQUEST_DATA);
super.close();
}
@Override
public boolean isReadResumed() {
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered != null) {
return readsResumed;
}
if(isFinished()) {
return false;
}
return anyAreSet(state, FLAG_SHOULD_RESUME_READS) || super.isReadResumed();
}
@Override
public int read(ByteBuffer dst) throws IOException {
PooledByteBuffer[] buffered = getAttachment(BUFFERED_REQUEST_DATA);
if (buffered == null) {
return super.read(dst);
}
int copied = 0;
for (int i = 0; i < buffered.length; ++i) {
PooledByteBuffer pooled = buffered[i];
if (pooled != null) {
final ByteBuffer buf = pooled.getBuffer();
if (buf.hasRemaining()) {
copied += Buffers.copy(dst, buf);
if (!buf.hasRemaining()) {
pooled.close();
buffered[i] = null;
}
if (!dst.hasRemaining()) {
return copied;
}
} else {
pooled.close();
buffered[i] = null;
}
}
}
removeAttachment(BUFFERED_REQUEST_DATA);
if (copied == 0) {
return super.read(dst);
} else {
return copied;
}
}
public void runResume() {
if (isReadResumed()) {
if(isFinished()) {
invokeListener();
} else {
if (wakeup) {
wakeup = false;
clearFlags(FLAG_SHOULD_RESUME_READS);
delegate.wakeupReads();
} else {
clearFlags(FLAG_SHOULD_RESUME_READS);
delegate.resumeReads();
}
}
} else if(wakeup) {
wakeup = false;
invokeListener();
}
}
}
public static class WrapperStreamSinkConduitFactory implements ConduitFactory<StreamSinkConduit> {
private final HttpServerExchange exchange;
private final ConduitWrapper<StreamSinkConduit>[] wrappers;
private int position;
private final StreamSinkConduit first;
public WrapperStreamSinkConduitFactory(ConduitWrapper<StreamSinkConduit>[] wrappers, int wrapperCount, HttpServerExchange exchange, StreamSinkConduit first) {
this.wrappers = wrappers;
this.exchange = exchange;
this.first = first;
this.position = wrapperCount - 1;
}
@Override
public StreamSinkConduit create() {
if (position == -1) {
return exchange.getConnection().getSinkConduit(exchange, first);
} else {
return wrappers[position--].wrap(this, exchange);
}
}
}
public static class WrapperConduitFactory<T extends Conduit> implements ConduitFactory<T> {
private final HttpServerExchange exchange;
private final ConduitWrapper<T>[] wrappers;
private int position;
private T first;
public WrapperConduitFactory(ConduitWrapper<T>[] wrappers, int wrapperCount, T first, HttpServerExchange exchange) {
this.wrappers = wrappers;
this.exchange = exchange;
this.position = wrapperCount - 1;
this.first = first;
}
@Override
public T create() {
if (position == -1) {
return first;
} else {
return wrappers[position--].wrap(this, exchange);
}
}
}
@Override
public String toString() {
return "HttpServerExchange{ " + getRequestMethod().toString() + " " + getRequestURI() + '}';
}
private void setFlags(int flags) {
int old;
do {
old = state;
} while (!stateUpdater.compareAndSet(this, old, old | flags));
}
private void clearFlags(int flags) {
int old;
do {
old = state;
} while (!stateUpdater.compareAndSet(this, old, old & ~flags));
}
}