src/java.net.http/share/classes/module-info.java - master - githubmirror/riscv-port

src/java.net.http/share/classes/module-info.java
298 строк17 KB
Daniel Fuchs
8371950: The jdk.httpclient.keepalive.timeout system networking property does not specify the behaviour for values <= 0
16 фев 2026, 13:56
16 фев 2026, 13:561a16c0d
/*
 * Copyright (c) 2015, 2026, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 * 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,
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 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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/**
 * Defines the {@linkplain java.net.http HTTP Client and WebSocket APIs}.
 * <p>
 * <b id="httpclientprops">System properties used by the java.net.http API</b>
 * <p>
 * The following is a list of system networking properties used by the java.net.http
 * client implementation in the JDK. Any properties below that take a numeric value
 * assume the default value if given a string that does not parse as a number.
 * Unless otherwise specified below, all values can be set in the {@code conf/net.properties}
 * file. In all cases, values can be specified as system properties on the command line,
 * in which case, any value in {@code conf/net.properties} is overridden. No guarantee is
 * provided that property values can be set programatically with {@code System.setProperty()}.
 * Other implementations of this API may choose not to support these properties.
 * <ul>
 * <li><p><b>{@systemProperty jdk.httpclient.allowRestrictedHeaders}</b> (default: see below)<br>
 * A comma-separated list of normally restricted HTTP header names that users may set in HTTP
 * requests or by user code in HttpRequest instances. By default, the following request
 * headers are not allowed to be set by user code: connection, content-length, expect, host,
 * and upgrade. You can override this behavior with this property. The names are case-insensitive
 * and whitespace is ignored. Note that this property is intended for testing and not for
 * real-world deployments. Protocol errors or other undefined behavior are likely to occur
 * when using this property. There may be other headers that are restricted from being set
 * depending on the context. These restrictions cannot be overridden by this property.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.bufsize}</b> (default: 16384 bytes or 16 kB)<br>
 * The capacity of internal ephemeral buffers allocated to pass data to and from the
 * client, in bytes. Valid values are in the range [1, 2^14 (16384)].
 * If an invalid value is provided, the default value is used.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.connectionPoolSize}</b> (default: 0)<br>
 * The maximum number of connections to keep in the HTTP/1.1 keep alive cache. A value of 0
 * means that the cache is unbounded.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.connectionWindowSize}</b> (default: 2^26)<br>
 * The HTTP/2 client connection window size in bytes. Valid values are in the range
 * [2^16-1, 2^31-1]. If an invalid value is provided, the default value is used.
 * The implementation guarantees that the actual value will be no smaller than the stream
 * window size, which can be configured through the {@code jdk.httpclient.windowsize}
 * system property.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.disableRetryConnect}</b> (default: false)<br>
 * Whether automatic retry of connection failures is disabled. If false, then retries are
 * attempted (subject to the retry limit).
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.enableAllMethodRetry}</b> (default: false)<br>
 * Whether it is permitted to automatically retry non-idempotent HTTP requests.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.enablepush}</b> (default: 1)<br>
 * Whether HTTP/2 push promise is enabled. A value of 1 enables push promise; a value of 0
 * disables it.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.hpack.maxheadertablesize}</b> (default: 16384 or
 * 16 kB)<br> The HTTP/2 client maximum HPACK header table size in bytes.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.qpack.decoderMaxTableCapacity}</b> (default: 0)
 * <br> The HTTP/3 client maximum QPACK decoder dynamic header table size in bytes.
 * <br> Setting this value to a positive number will allow HTTP/3 servers to add entries
 * to the QPack decoder's dynamic table. When set to 0, servers are not permitted to add
 * entries to the client's QPack encoder's dynamic table.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.qpack.encoderTableCapacityLimit}</b> (default: 4096,
 * or 4 kB)
 * <br> The HTTP/3 client maximum QPACK encoder dynamic header table size in bytes.
 * <br> Setting this value to a positive number allows the HTTP/3 client's QPack encoder to
 * add entries to the server's QPack decoder's dynamic table, if the server permits it.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.HttpClient.log}</b> (default: none)<br>
 * Enables high-level logging of various events through the {@linkplain java.lang.System.Logger
 * Platform Logging API}. The value contains a comma-separated list of any of the
 * following items:
 * <ul>
 *   <li>errors</li>
 *   <li>requests</li>
 *   <li>headers</li>
 *   <li>content</li>
 *   <li>frames</li>
 *   <li>ssl</li>
 *   <li>trace</li>
 *   <li>channel</li>
 *   <li>http3</li>
 *   <li>quic</li>
 * </ul><br>
 * You can append the frames item with a colon-separated list of any of the following items:
 * <ul>
 *   <li>control</li>
 *   <li>data</li>
 *   <li>window</li>
 *   <li>all</li>
 * </ul><br>
 * You can append the quic item with a colon-separated list of any of the following items;
 * packets are logged in an abridged form that only shows frames offset and length,
 * but not content:
 * <ul>
 *   <li>ack: packets containing ack frames will be logged</li>
 *   <li>cc: information on congestion control will be logged</li>
 *   <li>control: packets containing quic controls (such as frames affecting
 *                flow control, or frames opening or closing streams)
 *                will be logged</li>
 *   <li>crypto: packets containing crypto frames will be logged</li>
 *   <li>data: packets containing stream frames will be logged</li>
 *   <li>dbb: information on direct byte buffer usage will be logged</li>
 *   <li>ping: packets containing ping frames will be logged</li>
 *   <li>processed: information on flow control (processed bytes) will be logged</li>
 *   <li>retransmit: information on packet loss and recovery will be logged</li>
 *   <li>timer: information on send task scheduling will be logged</li>
 *   <li>all</li>
 * </ul><br>
 * Specifying an item adds it to the HTTP client's log. For example, if you specify the
 * following value, then the Platform Logging API logs all possible HTTP Client events:<br>
 * "errors,requests,headers,frames:control:data:window,ssl,trace,channel"<br>
 * Note that you can replace control:data:window with all. The name of the logger is
 * "jdk.httpclient.HttpClient", and all logging is at level INFO.
 * To debug issues with the quic protocol a good starting point is to specify
 * {@code quic:control:retransmit}.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.keepalive.timeout}</b> (default: 30)<br>
 * The number of seconds to keep idle HTTP connections alive in the keep alive cache.
 * By default this property applies to HTTP/1.1, HTTP/2 and HTTP/3.
 * The value for HTTP/2 and HTTP/3 can be overridden with the
 * {@code jdk.httpclient.keepalive.timeout.h2} and {@code jdk.httpclient.keepalive.timeout.h3}
 * properties respectively. The value specified for HTTP/2 acts as default value for HTTP/3.
 * If the provided value is negative, the default value is used.
 * A value of 0 is valid and has no special meaning other than the connection is closed
 * when it becomes idle.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.keepalive.timeout.h2}</b> (default: see
 * below)<br>The number of seconds to keep idle HTTP/2 connections alive. If not set, or negative,
 * then the {@code jdk.httpclient.keepalive.timeout} setting is used.
 * A value of 0 is valid and has no special meaning other than the connection is closed
 * when it becomes idle.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.keepalive.timeout.h3}</b> (default: see
 * below)<br>The number of seconds to keep idle HTTP/3 connections alive. If not set,
 * or negative, then the {@code jdk.httpclient.keepalive.timeout.h2} setting is used.
 * A value of 0 is valid and has no special meaning other than the connection is closed
 * when it becomes idle.
 * <li><p><b>{@systemProperty jdk.httpclient.maxframesize}</b> (default: 16384 or 16kB)<br>
 * The HTTP/2 client maximum frame size in bytes. The server is not permitted to send a frame
 * larger than this.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.maxLiteralWithIndexing}</b> (default: 512)<br>
 * The maximum number of header field lines (header name and value pairs) that a
 * client is willing to add to the HPack or QPACK Decoder dynamic table during the decoding
 * of an entire header field section.
 * This is purely an implementation limit.
 * If a peer sends a field section or a set of QPACK instructions with encoding that
 * exceeds this limit a {@link java.net.ProtocolException ProtocolException} will be raised.
 * A value of zero or a negative value means no limit.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.maxNonFinalResponses}</b> (default: 8)<br>
 * The maximum number of interim (non-final) responses that a client is prepared
 * to accept on a request-response stream before the final response is received.
 * Interim responses are responses with a status in the range [100, 199] inclusive.
 * This is purely an implementation limit.
 * If a peer sends a number of interim response that exceeds this limit before
 * sending the final response, a {@link java.net.ProtocolException ProtocolException}
 * will be raised.
 * A value of zero or a negative value means no limit.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.maxstreams}</b> (default: 100)<br>
 * The maximum number of HTTP/2 or HTTP/3 push streams that the client will permit servers to open
 * simultaneously.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.receiveBufferSize}</b> (default: operating system
 * default)<br>The HTTP client {@linkplain java.nio.channels.SocketChannel socket}
 * {@linkplain java.net.StandardSocketOptions#SO_RCVBUF receive buffer size} in bytes.
 * Values less than or equal to zero are ignored.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.redirects.retrylimit}</b> (default: 5)<br>
 * The maximum number of attempts to send a HTTP request when redirected or any failure occurs
 * for any reason.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.websocket.writeBufferSize}</b> (default: 16384
 * or 16kB)<br>The buffer size used by the web socket implementation for socket writes.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.windowsize}</b> (default: 16777216 or 16 MB)<br>
 * The HTTP/2 client stream window size in bytes. Valid values are in the range [2^14, 2^31-1].
 * If an invalid value is provided, the default value is used.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.auth.retrylimit}</b> (default: 3)<br>
 * The number of attempts the Basic authentication filter will attempt to retry a failed
 * authentication. The number of authentication attempts is always one greater than the
 * retry limit, as the initial request does not count toward the retries.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.sendBufferSize}</b> (default: operating system
 * default)<br>The HTTP client {@linkplain java.nio.channels.SocketChannel socket}
 * {@linkplain java.net.StandardSocketOptions#SO_SNDBUF send buffer size} in bytes.
 * Values less than or equal to zero are ignored.
 * </li>
 * <li><p><b>{@systemProperty jdk.internal.httpclient.disableHostnameVerification}</b> (default:
 * false)<br>If true (or set to an empty string), hostname verification in SSL certificates
 * is disabled. This is a system property only and not available in {@code conf/net.properties}.
 * It is provided for testing purposes only.
 * </li>
 * <li><p><b>{@systemProperty jdk.http.auth.proxying.disabledSchemes}</b> (default: see
 * conf/net.properties)<br>A comma separated list of HTTP authentication scheme names,
 * that are disallowed for use by the HTTP client implementation, for HTTP proxying.
 * </li>
 * <li><p><b>{@systemProperty jdk.http.auth.tunneling.disabledSchemes}</b> (default: see
 * conf/net.properties)<br>A comma separated list of HTTP authentication scheme names, that
 * are disallowed for use by the HTTP client implementation, for HTTP CONNECT tunneling.
 * </li>
 * <li><p><b>{@systemProperty jdk.http.maxHeaderSize}</b> (default: 393216 or 384kB)
 * <br>The maximum header field section size that the client is prepared to accept.
 * This is computed as the sum of the size of the uncompressed header name, plus
 * the size of the uncompressed header value, plus an overhead of 32 bytes for
 * each field section line. If a peer sends a field section that exceeds this
 * size a {@link java.net.ProtocolException ProtocolException} will be raised.
 * This applies to all versions of the protocol. A value of zero or a negative
 * value means no limit.
 * </li>
 * </ul>
 * <p>
 * The following system properties can be used to configure some aspects of the
 * <a href="https://www.rfc-editor.org/info/rfc9000">QUIC Protocol</a>
 * implementation used for HTTP/3:
 * <ul>
 * <li><p><b>{@systemProperty jdk.httpclient.quic.receiveBufferSize}</b> (default: operating system
 * default)<br>The QUIC {@linkplain java.nio.channels.DatagramChannel UDP client socket}
 * {@linkplain java.net.StandardSocketOptions#SO_RCVBUF receive buffer size} in bytes.
 * Values less than or equal to zero are ignored.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.quic.sendBufferSize}</b> (default: operating system
 * default)<br>The QUIC {@linkplain java.nio.channels.DatagramChannel UDP client socket}
 * {@linkplain java.net.StandardSocketOptions#SO_SNDBUF send buffer size} in bytes.
 * Values less than or equal to zero are ignored.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.quic.defaultMTU}</b> (default: 1200 bytes)<br>
 * The default Maximum Transmission Unit (MTU) size that will be used on quic connections.
 * The default implementation of the HTTP/3 client does not implement Path MTU Detection,
 * but will attempt to send 1-RTT packets up to the size defined by this property.
 * Specifying a higher value may give better upload performance when the client and
 * servers are located on the same machine, but is likely to result in irrecoverable
 * packet loss if used over the network. Allowed values are in the range [1200, 65527].
 * If an out-of-range value is specified, the minimum default value will be used.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.quic.maxBytesInFlight}</b> (default:
 * 16777216 bytes or 16MB)<br>
 * This is the maximum number of unacknowledged bytes that the quic congestion
 * controller allows to be in flight. When this amount is reached, no new
 * data is sent until some of the packets in flight are acknowledged.
 * <br>
 * Allowed values are in the range [2^14, 2^24] (or [16kB, 16MB]).
 * If an out-of-range value is specified, it will be clamped to the closest
 * value in range.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.quic.maxInitialData}</b> (default: 15728640
 * bytes, or 15MB)<br>
 * The initial flow control limit for quic connections in bytes. Valid values are in
 * the range [0, 2^60]. The initial limit is also used to initialize the receive window
 * size. If less than 16kB, the window size will be set to 16kB.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.quic.maxStreamInitialData}</b> (default: 6291456
 * bytes, or 6MB)<br>
 * The initial flow control limit for quic streams in bytes. Valid values are in
 * the range [0, 2^60]. The initial limit is also used to initialize the receive window
 * size. If less than 16kB, the window size will be set to 16kB.
 * </li>
 * <li><p><b>{@systemProperty jdk.httpclient.quic.maxInitialTimeout}</b> (default: 30
 * seconds)<br>
 * This is the maximum time, in seconds, during which the client will wait for a
 * response from the server, and continue retransmitting the first Quic INITIAL packet,
 * before raising a {@link java.net.ConnectException}. The first INITIAL packet received
 * from the target server will disarm this timeout.
 * </li>
 *
 * </ul>
 * @moduleGraph
 * @since 11
 */
module java.net.http {
    exports java.net.http;
}