| /* |
| * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.net.http; |
| |
| import java.io.EOFException; |
| import java.lang.System.Logger.Level; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.CompletionStage; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.Flow; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicLong; |
| import java.util.function.Consumer; |
| import java.util.function.Function; |
| import java.net.http.HttpHeaders; |
| import java.net.http.HttpResponse; |
| import jdk.internal.net.http.ResponseContent.BodyParser; |
| import jdk.internal.net.http.ResponseContent.UnknownLengthBodyParser; |
| import jdk.internal.net.http.common.Log; |
| import jdk.internal.net.http.common.Logger; |
| import jdk.internal.net.http.common.MinimalFuture; |
| import jdk.internal.net.http.common.Utils; |
| import static java.net.http.HttpClient.Version.HTTP_1_1; |
| import static java.net.http.HttpResponse.BodySubscribers.discarding; |
| import static jdk.internal.net.http.common.Utils.wrapWithExtraDetail; |
| import static jdk.internal.net.http.RedirectFilter.HTTP_NOT_MODIFIED; |
| |
| /** |
| * Handles a HTTP/1.1 response (headers + body). |
| * There can be more than one of these per Http exchange. |
| */ |
| class Http1Response<T> { |
| |
| private volatile ResponseContent content; |
| private final HttpRequestImpl request; |
| private Response response; |
| private final HttpConnection connection; |
| private HttpHeaders headers; |
| private int responseCode; |
| private final Http1Exchange<T> exchange; |
| private boolean return2Cache; // return connection to cache when finished |
| private final HeadersReader headersReader; // used to read the headers |
| private final BodyReader bodyReader; // used to read the body |
| private final Http1AsyncReceiver asyncReceiver; |
| private volatile EOFException eof; |
| private volatile BodyParser bodyParser; |
| // max number of bytes of (fixed length) body to ignore on redirect |
| private final static int MAX_IGNORE = 1024; |
| |
| // Revisit: can we get rid of this? |
| static enum State {INITIAL, READING_HEADERS, READING_BODY, DONE} |
| private volatile State readProgress = State.INITIAL; |
| |
| final Logger debug = Utils.getDebugLogger(this::dbgString, Utils.DEBUG); |
| final static AtomicLong responseCount = new AtomicLong(); |
| final long id = responseCount.incrementAndGet(); |
| private Http1HeaderParser hd; |
| |
| Http1Response(HttpConnection conn, |
| Http1Exchange<T> exchange, |
| Http1AsyncReceiver asyncReceiver) { |
| this.readProgress = State.INITIAL; |
| this.request = exchange.request(); |
| this.exchange = exchange; |
| this.connection = conn; |
| this.asyncReceiver = asyncReceiver; |
| headersReader = new HeadersReader(this::advance); |
| bodyReader = new BodyReader(this::advance); |
| |
| hd = new Http1HeaderParser(); |
| readProgress = State.READING_HEADERS; |
| headersReader.start(hd); |
| asyncReceiver.subscribe(headersReader); |
| } |
| |
| String dbgTag; |
| private String dbgString() { |
| String dbg = dbgTag; |
| if (dbg == null) { |
| String cdbg = connection.dbgTag; |
| if (cdbg != null) { |
| dbgTag = dbg = "Http1Response(id=" + id + ", " + cdbg + ")"; |
| } else { |
| dbg = "Http1Response(id=" + id + ")"; |
| } |
| } |
| return dbg; |
| } |
| |
| // The ClientRefCountTracker is used to track the state |
| // of a pending operation. Altough there usually is a single |
| // point where the operation starts, it may terminate at |
| // different places. |
| private final class ClientRefCountTracker { |
| final HttpClientImpl client = connection.client(); |
| // state & 0x01 != 0 => acquire called |
| // state & 0x02 != 0 => tryRelease called |
| byte state; |
| |
| public synchronized void acquire() { |
| if (state == 0) { |
| // increment the reference count on the HttpClientImpl |
| // to prevent the SelectorManager thread from exiting |
| // until our operation is complete. |
| if (debug.on()) |
| debug.log("Operation started: incrementing ref count for %s", client); |
| client.reference(); |
| state = 0x01; |
| } else { |
| if (debug.on()) |
| debug.log("Operation ref count for %s is already %s", |
| client, ((state & 0x2) == 0x2) ? "released." : "incremented!" ); |
| assert (state & 0x01) == 0 : "reference count already incremented"; |
| } |
| } |
| |
| public synchronized void tryRelease() { |
| if (state == 0x01) { |
| // decrement the reference count on the HttpClientImpl |
| // to allow the SelectorManager thread to exit if no |
| // other operation is pending and the facade is no |
| // longer referenced. |
| if (debug.on()) |
| debug.log("Operation finished: decrementing ref count for %s", client); |
| client.unreference(); |
| } else if (state == 0) { |
| if (debug.on()) |
| debug.log("Operation finished: releasing ref count for %s", client); |
| } else if ((state & 0x02) == 0x02) { |
| if (debug.on()) |
| debug.log("ref count for %s already released", client); |
| } |
| state |= 0x02; |
| } |
| } |
| |
| private volatile boolean firstTimeAround = true; |
| |
| public CompletableFuture<Response> readHeadersAsync(Executor executor) { |
| if (debug.on()) |
| debug.log("Reading Headers: (remaining: " |
| + asyncReceiver.remaining() +") " + readProgress); |
| |
| if (firstTimeAround) { |
| if (debug.on()) debug.log("First time around"); |
| firstTimeAround = false; |
| } else { |
| // with expect continue we will resume reading headers + body. |
| asyncReceiver.unsubscribe(bodyReader); |
| bodyReader.reset(); |
| |
| hd = new Http1HeaderParser(); |
| readProgress = State.READING_HEADERS; |
| headersReader.reset(); |
| headersReader.start(hd); |
| asyncReceiver.subscribe(headersReader); |
| } |
| |
| CompletableFuture<State> cf = headersReader.completion(); |
| assert cf != null : "parsing not started"; |
| if (debug.on()) { |
| debug.log("headersReader is %s", |
| cf == null ? "not yet started" |
| : cf.isDone() ? "already completed" |
| : "not yet completed"); |
| } |
| |
| Function<State, Response> lambda = (State completed) -> { |
| assert completed == State.READING_HEADERS; |
| if (debug.on()) |
| debug.log("Reading Headers: creating Response object;" |
| + " state is now " + readProgress); |
| asyncReceiver.unsubscribe(headersReader); |
| responseCode = hd.responseCode(); |
| headers = hd.headers(); |
| |
| response = new Response(request, |
| exchange.getExchange(), |
| headers, |
| connection, |
| responseCode, |
| HTTP_1_1); |
| |
| if (Log.headers()) { |
| StringBuilder sb = new StringBuilder("RESPONSE HEADERS:\n"); |
| Log.dumpHeaders(sb, " ", headers); |
| Log.logHeaders(sb.toString()); |
| } |
| |
| return response; |
| }; |
| |
| if (executor != null) { |
| return cf.thenApplyAsync(lambda, executor); |
| } else { |
| return cf.thenApply(lambda); |
| } |
| } |
| |
| private boolean finished; |
| |
| synchronized void completed() { |
| finished = true; |
| } |
| |
| synchronized boolean finished() { |
| return finished; |
| } |
| |
| /** |
| * Return known fixed content length or -1 if chunked, or -2 if no content-length |
| * information in which case, connection termination delimits the response body |
| */ |
| int fixupContentLen(int clen) { |
| if (request.method().equalsIgnoreCase("HEAD") || responseCode == HTTP_NOT_MODIFIED) { |
| return 0; |
| } |
| if (clen == -1) { |
| if (headers.firstValue("Transfer-encoding").orElse("") |
| .equalsIgnoreCase("chunked")) { |
| return -1; |
| } |
| if (responseCode == 101) { |
| // this is a h2c or websocket upgrade, contentlength must be zero |
| return 0; |
| } |
| return -2; |
| } |
| return clen; |
| } |
| |
| /** |
| * Read up to MAX_IGNORE bytes discarding |
| */ |
| public CompletableFuture<Void> ignoreBody(Executor executor) { |
| int clen = (int)headers.firstValueAsLong("Content-Length").orElse(-1); |
| if (clen == -1 || clen > MAX_IGNORE) { |
| connection.close(); |
| return MinimalFuture.completedFuture(null); // not treating as error |
| } else { |
| return readBody(discarding(), true, executor); |
| } |
| } |
| |
| static final Flow.Subscription NOP = new Flow.Subscription() { |
| @Override |
| public void request(long n) { } |
| public void cancel() { } |
| }; |
| |
| /** |
| * The Http1AsyncReceiver ensures that all calls to |
| * the subscriber, including onSubscribe, occur sequentially. |
| * There could however be some race conditions that could happen |
| * in case of unexpected errors thrown at unexpected places, which |
| * may cause onError to be called multiple times. |
| * The Http1BodySubscriber will ensure that the user subscriber |
| * is actually completed only once - and only after it is |
| * subscribed. |
| * @param <U> The type of response. |
| */ |
| final static class Http1BodySubscriber<U> implements HttpResponse.BodySubscriber<U> { |
| final HttpResponse.BodySubscriber<U> userSubscriber; |
| final AtomicBoolean completed = new AtomicBoolean(); |
| volatile Throwable withError; |
| volatile boolean subscribed; |
| Http1BodySubscriber(HttpResponse.BodySubscriber<U> userSubscriber) { |
| this.userSubscriber = userSubscriber; |
| } |
| |
| // propagate the error to the user subscriber, even if not |
| // subscribed yet. |
| private void propagateError(Throwable t) { |
| assert t != null; |
| try { |
| // if unsubscribed at this point, it will not |
| // get subscribed later - so do it now and |
| // propagate the error |
| if (subscribed == false) { |
| subscribed = true; |
| userSubscriber.onSubscribe(NOP); |
| } |
| } finally { |
| // if onError throws then there is nothing to do |
| // here: let the caller deal with it by logging |
| // and closing the connection. |
| userSubscriber.onError(t); |
| } |
| } |
| |
| // complete the subscriber, either normally or exceptionally |
| // ensure that the subscriber is completed only once. |
| private void complete(Throwable t) { |
| if (completed.compareAndSet(false, true)) { |
| t = withError = Utils.getCompletionCause(t); |
| if (t == null) { |
| assert subscribed; |
| try { |
| userSubscriber.onComplete(); |
| } catch (Throwable x) { |
| // Simply propagate the error by calling |
| // onError on the user subscriber, and let the |
| // connection be reused since we should have received |
| // and parsed all the bytes when we reach here. |
| // If onError throws in turn, then we will simply |
| // let that new exception flow up to the caller |
| // and let it deal with it. |
| // (i.e: log and close the connection) |
| // Note that rethrowing here could introduce a |
| // race that might cause the next send() operation to |
| // fail as the connection has already been put back |
| // into the cache when we reach here. |
| propagateError(t = withError = Utils.getCompletionCause(x)); |
| } |
| } else { |
| propagateError(t); |
| } |
| } |
| } |
| |
| @Override |
| public CompletionStage<U> getBody() { |
| return userSubscriber.getBody(); |
| } |
| @Override |
| public void onSubscribe(Flow.Subscription subscription) { |
| if (!subscribed) { |
| subscribed = true; |
| userSubscriber.onSubscribe(subscription); |
| } else { |
| // could be already subscribed and completed |
| // if an unexpected error occurred before the actual |
| // subscription - though that's not supposed |
| // happen. |
| assert completed.get(); |
| } |
| } |
| @Override |
| public void onNext(List<ByteBuffer> item) { |
| assert !completed.get(); |
| userSubscriber.onNext(item); |
| } |
| @Override |
| public void onError(Throwable throwable) { |
| complete(throwable); |
| } |
| @Override |
| public void onComplete() { |
| complete(null); |
| } |
| } |
| |
| public <U> CompletableFuture<U> readBody(HttpResponse.BodySubscriber<U> p, |
| boolean return2Cache, |
| Executor executor) { |
| this.return2Cache = return2Cache; |
| final Http1BodySubscriber<U> subscriber = new Http1BodySubscriber<>(p); |
| |
| final CompletableFuture<U> cf = new MinimalFuture<>(); |
| |
| int clen0 = (int)headers.firstValueAsLong("Content-Length").orElse(-1); |
| |
| final int clen = fixupContentLen(clen0); |
| |
| // expect-continue reads headers and body twice. |
| // if we reach here, we must reset the headersReader state. |
| asyncReceiver.unsubscribe(headersReader); |
| headersReader.reset(); |
| ClientRefCountTracker refCountTracker = new ClientRefCountTracker(); |
| |
| // We need to keep hold on the client facade until the |
| // tracker has been incremented. |
| connection.client().reference(); |
| executor.execute(() -> { |
| try { |
| content = new ResponseContent( |
| connection, clen, headers, subscriber, |
| this::onFinished |
| ); |
| if (cf.isCompletedExceptionally()) { |
| // if an error occurs during subscription |
| connection.close(); |
| return; |
| } |
| // increment the reference count on the HttpClientImpl |
| // to prevent the SelectorManager thread from exiting until |
| // the body is fully read. |
| refCountTracker.acquire(); |
| bodyParser = content.getBodyParser( |
| (t) -> { |
| try { |
| if (t != null) { |
| try { |
| subscriber.onError(t); |
| } finally { |
| cf.completeExceptionally(t); |
| } |
| } |
| } finally { |
| bodyReader.onComplete(t); |
| if (t != null) { |
| connection.close(); |
| } |
| } |
| }); |
| bodyReader.start(bodyParser); |
| CompletableFuture<State> bodyReaderCF = bodyReader.completion(); |
| asyncReceiver.subscribe(bodyReader); |
| assert bodyReaderCF != null : "parsing not started"; |
| // Make sure to keep a reference to asyncReceiver from |
| // within this |
| CompletableFuture<?> trailingOp = bodyReaderCF.whenComplete((s,t) -> { |
| t = Utils.getCompletionCause(t); |
| try { |
| if (t == null) { |
| if (debug.on()) debug.log("Finished reading body: " + s); |
| assert s == State.READING_BODY; |
| } |
| if (t != null) { |
| subscriber.onError(t); |
| cf.completeExceptionally(t); |
| } |
| } catch (Throwable x) { |
| // not supposed to happen |
| asyncReceiver.onReadError(x); |
| } finally { |
| // we're done: release the ref count for |
| // the current operation. |
| refCountTracker.tryRelease(); |
| } |
| }); |
| connection.addTrailingOperation(trailingOp); |
| } catch (Throwable t) { |
| if (debug.on()) debug.log("Failed reading body: " + t); |
| try { |
| subscriber.onError(t); |
| cf.completeExceptionally(t); |
| } finally { |
| asyncReceiver.onReadError(t); |
| } |
| } finally { |
| connection.client().unreference(); |
| } |
| }); |
| try { |
| p.getBody().whenComplete((U u, Throwable t) -> { |
| if (t == null) |
| cf.complete(u); |
| else |
| cf.completeExceptionally(t); |
| }); |
| } catch (Throwable t) { |
| cf.completeExceptionally(t); |
| asyncReceiver.setRetryOnError(false); |
| asyncReceiver.onReadError(t); |
| } |
| |
| return cf.whenComplete((s,t) -> { |
| if (t != null) { |
| // If an exception occurred, release the |
| // ref count for the current operation, as |
| // it may never be triggered otherwise |
| // (BodySubscriber ofInputStream) |
| // If there was no exception then the |
| // ref count will be/have been released when |
| // the last byte of the response is/was received |
| refCountTracker.tryRelease(); |
| } |
| }); |
| } |
| |
| |
| private void onFinished() { |
| asyncReceiver.clear(); |
| if (return2Cache) { |
| Log.logTrace("Attempting to return connection to the pool: {0}", connection); |
| // TODO: need to do something here? |
| // connection.setAsyncCallbacks(null, null, null); |
| |
| // don't return the connection to the cache if EOF happened. |
| if (debug.on()) |
| debug.log(connection.getConnectionFlow() + ": return to HTTP/1.1 pool"); |
| connection.closeOrReturnToCache(eof == null ? headers : null); |
| } |
| } |
| |
| HttpHeaders responseHeaders() { |
| return headers; |
| } |
| |
| int responseCode() { |
| return responseCode; |
| } |
| |
| // ================ Support for plugging into Http1Receiver ================= |
| // ============================================================================ |
| |
| // Callback: Error receiver: Consumer of Throwable. |
| void onReadError(Throwable t) { |
| Log.logError(t); |
| Receiver<?> receiver = receiver(readProgress); |
| if (t instanceof EOFException) { |
| debug.log(Level.DEBUG, "onReadError: received EOF"); |
| eof = (EOFException) t; |
| } |
| CompletableFuture<?> cf = receiver == null ? null : receiver.completion(); |
| debug.log(Level.DEBUG, () -> "onReadError: cf is " |
| + (cf == null ? "null" |
| : (cf.isDone() ? "already completed" |
| : "not yet completed"))); |
| if (cf != null) { |
| cf.completeExceptionally(t); |
| } else { |
| debug.log(Level.DEBUG, "onReadError", t); |
| } |
| debug.log(Level.DEBUG, () -> "closing connection: cause is " + t); |
| connection.close(); |
| } |
| |
| // ======================================================================== |
| |
| private State advance(State previous) { |
| assert readProgress == previous; |
| switch(previous) { |
| case READING_HEADERS: |
| asyncReceiver.unsubscribe(headersReader); |
| return readProgress = State.READING_BODY; |
| case READING_BODY: |
| asyncReceiver.unsubscribe(bodyReader); |
| return readProgress = State.DONE; |
| default: |
| throw new InternalError("can't advance from " + previous); |
| } |
| } |
| |
| Receiver<?> receiver(State state) { |
| switch(state) { |
| case READING_HEADERS: return headersReader; |
| case READING_BODY: return bodyReader; |
| default: return null; |
| } |
| |
| } |
| |
| static abstract class Receiver<T> |
| implements Http1AsyncReceiver.Http1AsyncDelegate { |
| abstract void start(T parser); |
| abstract CompletableFuture<State> completion(); |
| // accepts a buffer from upstream. |
| // this should be implemented as a simple call to |
| // accept(ref, parser, cf) |
| public abstract boolean tryAsyncReceive(ByteBuffer buffer); |
| public abstract void onReadError(Throwable t); |
| // handle a byte buffer received from upstream. |
| // this method should set the value of Http1Response.buffer |
| // to ref.get() before beginning parsing. |
| abstract void handle(ByteBuffer buf, T parser, |
| CompletableFuture<State> cf); |
| // resets this objects state so that it can be reused later on |
| // typically puts the reference to parser and completion to null |
| abstract void reset(); |
| |
| // accepts a byte buffer received from upstream |
| // returns true if the buffer is fully parsed and more data can |
| // be accepted, false otherwise. |
| final boolean accept(ByteBuffer buf, T parser, |
| CompletableFuture<State> cf) { |
| if (cf == null || parser == null || cf.isDone()) return false; |
| handle(buf, parser, cf); |
| return !cf.isDone(); |
| } |
| public abstract void onSubscribe(AbstractSubscription s); |
| public abstract AbstractSubscription subscription(); |
| |
| } |
| |
| // Invoked with each new ByteBuffer when reading headers... |
| final class HeadersReader extends Receiver<Http1HeaderParser> { |
| final Consumer<State> onComplete; |
| volatile Http1HeaderParser parser; |
| volatile CompletableFuture<State> cf; |
| volatile long count; // bytes parsed (for debug) |
| volatile AbstractSubscription subscription; |
| |
| HeadersReader(Consumer<State> onComplete) { |
| this.onComplete = onComplete; |
| } |
| |
| @Override |
| public AbstractSubscription subscription() { |
| return subscription; |
| } |
| |
| @Override |
| public void onSubscribe(AbstractSubscription s) { |
| this.subscription = s; |
| s.request(1); |
| } |
| |
| @Override |
| void reset() { |
| cf = null; |
| parser = null; |
| count = 0; |
| subscription = null; |
| } |
| |
| // Revisit: do we need to support restarting? |
| @Override |
| final void start(Http1HeaderParser hp) { |
| count = 0; |
| cf = new MinimalFuture<>(); |
| parser = hp; |
| } |
| |
| @Override |
| CompletableFuture<State> completion() { |
| return cf; |
| } |
| |
| @Override |
| public final boolean tryAsyncReceive(ByteBuffer ref) { |
| boolean hasDemand = subscription.demand().tryDecrement(); |
| assert hasDemand; |
| boolean needsMore = accept(ref, parser, cf); |
| if (needsMore) subscription.request(1); |
| return needsMore; |
| } |
| |
| @Override |
| public final void onReadError(Throwable t) { |
| t = wrapWithExtraDetail(t, parser::currentStateMessage); |
| Http1Response.this.onReadError(t); |
| } |
| |
| @Override |
| final void handle(ByteBuffer b, |
| Http1HeaderParser parser, |
| CompletableFuture<State> cf) { |
| assert cf != null : "parsing not started"; |
| assert parser != null : "no parser"; |
| try { |
| count += b.remaining(); |
| if (debug.on()) |
| debug.log("Sending " + b.remaining() + "/" + b.capacity() |
| + " bytes to header parser"); |
| if (parser.parse(b)) { |
| count -= b.remaining(); |
| if (debug.on()) |
| debug.log("Parsing headers completed. bytes=" + count); |
| onComplete.accept(State.READING_HEADERS); |
| cf.complete(State.READING_HEADERS); |
| } |
| } catch (Throwable t) { |
| if (debug.on()) |
| debug.log("Header parser failed to handle buffer: " + t); |
| cf.completeExceptionally(t); |
| } |
| } |
| |
| @Override |
| public void close(Throwable error) { |
| // if there's no error nothing to do: the cf should/will |
| // be completed. |
| if (error != null) { |
| CompletableFuture<State> cf = this.cf; |
| if (cf != null) { |
| if (debug.on()) |
| debug.log("close: completing header parser CF with " + error); |
| cf.completeExceptionally(error); |
| } |
| } |
| } |
| } |
| |
| // Invoked with each new ByteBuffer when reading bodies... |
| final class BodyReader extends Receiver<BodyParser> { |
| final Consumer<State> onComplete; |
| volatile BodyParser parser; |
| volatile CompletableFuture<State> cf; |
| volatile AbstractSubscription subscription; |
| BodyReader(Consumer<State> onComplete) { |
| this.onComplete = onComplete; |
| } |
| |
| @Override |
| void reset() { |
| parser = null; |
| cf = null; |
| subscription = null; |
| } |
| |
| // Revisit: do we need to support restarting? |
| @Override |
| final void start(BodyParser parser) { |
| cf = new MinimalFuture<>(); |
| this.parser = parser; |
| } |
| |
| @Override |
| CompletableFuture<State> completion() { |
| return cf; |
| } |
| |
| @Override |
| public final boolean tryAsyncReceive(ByteBuffer b) { |
| return accept(b, parser, cf); |
| } |
| |
| @Override |
| public final void onReadError(Throwable t) { |
| if (t instanceof EOFException && bodyParser != null && |
| bodyParser instanceof UnknownLengthBodyParser) { |
| ((UnknownLengthBodyParser)bodyParser).complete(); |
| return; |
| } |
| t = wrapWithExtraDetail(t, parser::currentStateMessage); |
| Http1Response.this.onReadError(t); |
| } |
| |
| @Override |
| public AbstractSubscription subscription() { |
| return subscription; |
| } |
| |
| @Override |
| public void onSubscribe(AbstractSubscription s) { |
| this.subscription = s; |
| try { |
| parser.onSubscribe(s); |
| } catch (Throwable t) { |
| cf.completeExceptionally(t); |
| throw t; |
| } |
| } |
| |
| @Override |
| final void handle(ByteBuffer b, |
| BodyParser parser, |
| CompletableFuture<State> cf) { |
| assert cf != null : "parsing not started"; |
| assert parser != null : "no parser"; |
| try { |
| if (debug.on()) |
| debug.log("Sending " + b.remaining() + "/" + b.capacity() |
| + " bytes to body parser"); |
| parser.accept(b); |
| } catch (Throwable t) { |
| if (debug.on()) |
| debug.log("Body parser failed to handle buffer: " + t); |
| if (!cf.isDone()) { |
| cf.completeExceptionally(t); |
| } |
| } |
| } |
| |
| final void onComplete(Throwable closedExceptionally) { |
| if (cf.isDone()) return; |
| if (closedExceptionally != null) { |
| cf.completeExceptionally(closedExceptionally); |
| } else { |
| onComplete.accept(State.READING_BODY); |
| cf.complete(State.READING_BODY); |
| } |
| } |
| |
| @Override |
| public final void close(Throwable error) { |
| CompletableFuture<State> cf = this.cf; |
| if (cf != null && !cf.isDone()) { |
| // we want to make sure dependent actions are triggered |
| // in order to make sure the client reference count |
| // is decremented |
| if (error != null) { |
| if (debug.on()) |
| debug.log("close: completing body parser CF with " + error); |
| cf.completeExceptionally(error); |
| } else { |
| if (debug.on()) |
| debug.log("close: completing body parser CF"); |
| cf.complete(State.READING_BODY); |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + "/parser=" + String.valueOf(parser); |
| } |
| } |
| } |
