| /* |
| * Copyright (c) 2015, 2016, 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.incubator.http; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.Executor; |
| import jdk.incubator.http.internal.common.Log; |
| import static jdk.incubator.http.HttpClient.Version.HTTP_1_1; |
| |
| /** |
| * Handles a HTTP/1.1 response in two blocking calls. readHeaders() and |
| * readBody(). 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 ResponseHeaders headers; |
| private int responseCode; |
| private final ByteBuffer buffer; // same buffer used for reading status line and headers |
| private final Http1Exchange<T> exchange; |
| private final boolean redirecting; // redirecting |
| private boolean return2Cache; // return connection to cache when finished |
| |
| Http1Response(HttpConnection conn, Http1Exchange<T> exchange) { |
| this.request = exchange.request(); |
| this.exchange = exchange; |
| this.connection = conn; |
| this.redirecting = false; |
| buffer = exchange.getBuffer(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void readHeaders() throws IOException { |
| String statusline = readStatusLine(); |
| if (statusline == null) { |
| if (Log.errors()) { |
| Log.logError("Connection closed. Retry"); |
| } |
| connection.close(); |
| // connection was closed |
| throw new IOException("Connection closed"); |
| } |
| if (!statusline.startsWith("HTTP/1.")) { |
| throw new IOException("Invalid status line: " + statusline); |
| } |
| if (Log.trace()) { |
| Log.logTrace("Statusline: {0}", statusline); |
| } |
| char c = statusline.charAt(7); |
| responseCode = Integer.parseInt(statusline.substring(9, 12)); |
| |
| headers = new ResponseHeaders(connection, buffer); |
| if (Log.headers()) { |
| logHeaders(headers); |
| } |
| response = new Response( |
| request, exchange.getExchange(), |
| headers, responseCode, HTTP_1_1); |
| } |
| |
| private boolean finished; |
| |
| synchronized void completed() { |
| finished = true; |
| } |
| |
| synchronized boolean finished() { |
| return finished; |
| } |
| |
| int fixupContentLen(int clen) { |
| if (request.method().equalsIgnoreCase("HEAD")) { |
| return 0; |
| } |
| if (clen == -1) { |
| if (headers.firstValue("Transfer-encoding").orElse("") |
| .equalsIgnoreCase("chunked")) { |
| return -1; |
| } |
| return 0; |
| } |
| return clen; |
| } |
| |
| public CompletableFuture<T> readBody( |
| HttpResponse.BodyProcessor<T> p, |
| boolean return2Cache, |
| Executor executor) { |
| final BlockingPushPublisher<ByteBuffer> publisher = new BlockingPushPublisher<>(); |
| return readBody(p, return2Cache, publisher, executor); |
| } |
| |
| private CompletableFuture<T> readBody( |
| HttpResponse.BodyProcessor<T> p, |
| boolean return2Cache, |
| AbstractPushPublisher<ByteBuffer> publisher, |
| Executor executor) { |
| this.return2Cache = return2Cache; |
| final jdk.incubator.http.HttpResponse.BodyProcessor<T> pusher = p; |
| final CompletableFuture<T> cf = p.getBody().toCompletableFuture(); |
| |
| int clen0; |
| try { |
| clen0 = headers.getContentLength(); |
| } catch (IOException ex) { |
| cf.completeExceptionally(ex); |
| return cf; |
| } |
| final int clen = fixupContentLen(clen0); |
| |
| executor.execute(() -> { |
| try { |
| content = new ResponseContent( |
| connection, clen, headers, pusher, |
| publisher.asDataConsumer(), |
| (t -> { |
| publisher.acceptError(t); |
| connection.close(); |
| cf.completeExceptionally(t); |
| }), |
| () -> onFinished() |
| ); |
| publisher.subscribe(p); |
| if (cf.isCompletedExceptionally()) { |
| // if an error occurs during subscription |
| connection.close(); |
| return; |
| } |
| content.pushBody(buffer); |
| } catch (Throwable t) { |
| cf.completeExceptionally(t); |
| } |
| }); |
| return cf; |
| } |
| |
| private void onFinished() { |
| if (return2Cache) { |
| connection.returnToCache(headers); |
| } |
| } |
| |
| private void logHeaders(ResponseHeaders headers) { |
| StringBuilder sb = new StringBuilder("RESPONSE HEADERS:\n"); |
| Log.dumpHeaders(sb, " ", headers); |
| Log.logHeaders(sb.toString()); |
| } |
| |
| Response response() { |
| return response; |
| } |
| |
| boolean redirecting() { |
| return redirecting; |
| } |
| |
| HttpHeaders responseHeaders() { |
| return headers; |
| } |
| |
| int responseCode() { |
| return responseCode; |
| } |
| |
| static final char CR = '\r'; |
| static final char LF = '\n'; |
| |
| private int getBuffer() throws IOException { |
| int n = buffer.remaining(); |
| |
| if (n == 0) { |
| buffer.clear(); |
| return connection.read(buffer); |
| } |
| return n; |
| } |
| |
| String readStatusLine() throws IOException { |
| boolean cr = false; |
| StringBuilder statusLine = new StringBuilder(128); |
| ByteBuffer b = buffer; |
| while (getBuffer() != -1) { |
| byte[] buf = b.array(); |
| int offset = b.position(); |
| int len = b.limit() - offset; |
| |
| for (int i = 0; i < len; i++) { |
| char c = (char) buf[i+offset]; |
| |
| if (cr) { |
| if (c == LF) { |
| b.position(i + 1 + offset); |
| return statusLine.toString(); |
| } else { |
| throw new IOException("invalid status line"); |
| } |
| } |
| if (c == CR) { |
| cr = true; |
| } else { |
| statusLine.append(c); |
| } |
| } |
| // unlikely, but possible, that multiple reads required |
| b.position(b.limit()); |
| } |
| return null; |
| } |
| } |