mirror of https://gitee.com/zhang_1334717033/kiftd
170 lines
13 KiB
HTML
170 lines
13 KiB
HTML
|
<!DOCTYPE html SYSTEM "about:legacy-compat">
|
||
|
|
<html lang="en"><head><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><link href="../images/docs-stylesheet.css" rel="stylesheet" type="text/css"><title>Apache Tomcat 9 Configuration Reference (9.0.0.M17) - The HTTP2 Upgrade Protocol</title><script type="application/javascript" data-comments-identifier="tomcat-9.0-doc/config/http2">
|
||
|
|
"use strict"; // Enable strict mode
|
||
|
|
|
||
|
|
(function() {
|
||
|
|
var thisScript = document.currentScript;
|
||
|
|
if (!thisScript) { // Workaround for IE <= 11
|
||
|
|
var scripts = document.getElementsByTagName("script");
|
||
|
|
thisScript = scripts[scripts.length - 1];
|
||
|
|
}
|
||
|
|
document.addEventListener("DOMContentLoaded", (function() {
|
||
|
|
var commentsDiv = document.getElementById("comments_thread");
|
||
|
|
var commentsShortname = "tomcat";
|
||
|
|
var commentsIdentifier = "http://tomcat.apache.org/" +
|
||
|
|
thisScript.getAttribute("data-comments-identifier") + ".html";
|
||
|
|
|
||
|
|
(function(w, d) {
|
||
|
|
if (w.location.hostname.toLowerCase() == "tomcat.apache.org") {
|
||
|
|
var s = d.createElement("script");
|
||
|
|
s.type = "application/javascript";
|
||
|
|
s.async = true;
|
||
|
|
s.src = "https://comments.apache.org/show_comments.lua?site=" +
|
||
|
|
encodeURIComponent(commentsShortname) +
|
||
|
|
"&page=" + encodeURIComponent(commentsIdentifier);
|
||
|
|
d.head.appendChild(s);
|
||
|
|
} else {
|
||
|
|
commentsDiv.appendChild(d.createTextNode("Comments are disabled for this page at the moment."));
|
||
|
|
}
|
||
|
|
})(window, document);
|
||
|
|
}), false);
|
||
|
|
})();
|
||
|
|
</script></head><body><div id="wrapper"><header><div id="header"><div><div><div class="logo noPrint"><a href="http://tomcat.apache.org/"><img alt="Tomcat Home" src="../images/tomcat.png"></a></div><div style="height: 1px;"></div><div class="asfLogo noPrint"><a href="http://www.apache.org/" target="_blank"><img src="../images/asf-logo.svg" alt="The Apache Software Foundation" style="width: 266px; height: 83px;"></a></div><h1>Apache Tomcat 9 Configuration Reference</h1><div class="versionInfo">
|
||
|
|
Version 9.0.0.M17,
|
||
|
|
<time datetime="2017-01-10">Jan 10 2017</time></div><div style="height: 1px;"></div><div style="clear: left;"></div></div></div></div></header><div id="middle"><div><div id="mainLeft" class="noprint"><div><nav><div><h2>Links</h2><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul></div><div><h2>Top Level Elements</h2><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul></div><div><h2>Executors</h2><ul><li><a href="executor.html">Executor</a></li></ul></div><div><h2>Connectors</h2><ul><li><a href="http.html">HTTP/1.1</a></li><li><a href="http2.html">HTTP/2</a></li><li><a href="ajp.html">AJP</a></li></ul></div><div><h2>Containers</h2><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul></div><div><h2>Nested Components</h2><ul><li><a href="cookie-processor.html">CookieProcessor</a></li><li><a href="credentialhandler.html">CredentialHandler</a></li><li><a href="globalresources.html">Global Resources</a></li><li><a href="jar-scanner.html">JarScanner</a></li><li><a href="jar-scan-filter.html">JarScanFilter</a></li><li><a href="listeners.html">Listeners</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="sessionidgenerator.html">SessionIdGenerator</a></li><li><a href="valve.html">Valve</a></li></ul></div><div><h2>Cluster Elements</h2><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul></div><div><h2>web.xml</h2><ul><li><a href="filter.html">Filter</a></li></ul></div><div><h2>Other</h2><ul><li><a href="systemprops.html">System properties</a></li><li><a href="jaspic.html">JASPIC</a></li></ul></div></nav></div></div><div id="mainRight"><div id="content"><h2>The HTTP2 Upgrade Protocol</h2><h3 id="Table_of_Contents">Table of Contents</h3><div class="text">
|
||
|
|
<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#Standard_Implementation">Standard Implementation</a></li></ol></li><li><a href="#Nested_Components">Nested Components</a></li><li><a href="#Special_Features">Special Features</a></li></ul>
|
||
|
|
</div><h3 id="Introduction">Introduction</h3><div class="text">
|
||
|
|
|
||
|
|
<p>The <strong>HTTP Upgrade Protocol</strong> element represents an
|
||
|
|
<strong>Upgrade Protocol</strong> component that supports the HTTP/2 protocol.
|
||
|
|
An instance of this component must be associated with an existing
|
||
|
|
<a href="http.html">HTTP/1.1 Connector</a>.</p>
|
||
|
|
|
||
|
|
<p>HTTP/2 connectors use non-blocking I/O, only utilising a container thread
|
||
|
|
from the thread pool when there is data to read and write. However, because
|
||
|
|
the Servlet API is fundamentally blocking, each HTTP/2 stream requires a
|
||
|
|
dedicated container thread for the duration of that stream.</p>
|
||
|
|
|
||
|
|
</div><h3 id="Attributes">Attributes</h3><div class="text">
|
||
|
|
|
||
|
|
<div class="subsection"><h4 id="Common_Attributes">Common Attributes</h4><div class="text">
|
||
|
|
|
||
|
|
<p>All implementations of <strong>Upgrade Protocol</strong> support the
|
||
|
|
following attributes:</p>
|
||
|
|
|
||
|
|
<table class="defaultTable"><tr><th style="width: 15%;">
|
||
|
|
Attribute
|
||
|
|
</th><th style="width: 85%;">
|
||
|
|
Description
|
||
|
|
</th></tr><tr><td><strong><code class="attributeName">className</code></strong></td><td>
|
||
|
|
<p>This must be <code>org.apache.coyote.http2.Http2Protocol</code>.</p>
|
||
|
|
</td></tr></table>
|
||
|
|
|
||
|
|
</div></div>
|
||
|
|
|
||
|
|
<div class="subsection"><h4 id="Standard_Implementation">Standard Implementation</h4><div class="text">
|
||
|
|
|
||
|
|
<p>The HTTP/2 <strong>Upgrade Protocol</strong> implementation supports the
|
||
|
|
following attributes in addition to the common attributes listed above.</p>
|
||
|
|
|
||
|
|
<table class="defaultTable"><tr><th style="width: 15%;">
|
||
|
|
Attribute
|
||
|
|
</th><th style="width: 85%;">
|
||
|
|
Description
|
||
|
|
</th></tr><tr><td><code class="attributeName">allowedTrailerHeaders</code></td><td>
|
||
|
|
<p>By default Tomcat will ignore all trailer headers when processing
|
||
|
|
HTTP/2 connections. For a header to be processed, it must be added to this
|
||
|
|
comma-separated list of header names.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">initialWindowSize</code></td><td>
|
||
|
|
<p>Controls the initial size of the flow control window for streams that
|
||
|
|
Tomcat advertises to clients. If not specified, the default value of
|
||
|
|
<code>65535</code> is used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">keepAliveTimeout</code></td><td>
|
||
|
|
<p>The time, in milliseconds, that Tomcat will wait between HTTP/2 frames
|
||
|
|
before closing the connection. Negative values will be treated as an
|
||
|
|
infinite timeout. If not specified, a default value of <code>-1</code>
|
||
|
|
will be used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">maxConcurrentStreamExecution</code></td><td>
|
||
|
|
<p>The controls the maximum number of streams for any one connection that
|
||
|
|
can be allocated threads from the container thread pool. If more streams
|
||
|
|
are active than threads are available, those streams will have to wait
|
||
|
|
for a stream to become available. If not specified, the default value of
|
||
|
|
<code>200</code> will be used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">maxConcurrentStreams</code></td><td>
|
||
|
|
<p>The controls the maximum number of active streams permitted for any one
|
||
|
|
connection. If a client attempts to open more active streams than this
|
||
|
|
limit, the stream will be reset with a <code>STREAM_REFUSED</code> error.
|
||
|
|
If not specified, the default value of <code>200</code> will be used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">maxHeaderCount</code></td><td>
|
||
|
|
<p>The maximum number of headers in a request that is allowed by the
|
||
|
|
container. A request that contains more headers than the specified limit
|
||
|
|
will be rejected. A value of less than 0 means no limit.
|
||
|
|
If not specified, a default of 100 is used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">maxHeaderSize</code></td><td>
|
||
|
|
<p>The maximum total size for all headers in a request that is allowed by
|
||
|
|
the container. Total size for a header is calculated as the uncompressed
|
||
|
|
size of the header name in bytes, plus the uncompressed size of the header
|
||
|
|
value in bytes plus an HTTP/2 overhead of 3 bytes per header. A request
|
||
|
|
that contains a set of headers that requires more than the specified limit
|
||
|
|
will be rejected. A value of less than 0 means no limit. If not specified,
|
||
|
|
a default of 8192 is used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">maxTrailerCount</code></td><td>
|
||
|
|
<p>The maximum number of trailer headers in a request that is allowed by
|
||
|
|
the container. A request that contains more trailer headers than the
|
||
|
|
specified limit will be rejected. A value of less than 0 means no limit.
|
||
|
|
If not specified, a default of 100 is used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">maxTrailerSize</code></td><td>
|
||
|
|
<p>The maximum total size for all trailer headers in a request that is
|
||
|
|
allowed by the container. Total size for a header is calculated as the
|
||
|
|
uncompressed size of the header name in bytes, plus the uncompressed size
|
||
|
|
of the header value in bytes plus an HTTP/2 overhead of 3 bytes per
|
||
|
|
header. A request that contains a set of trailer headers that requires
|
||
|
|
more than the specified limit will be rejected. A value of less than 0
|
||
|
|
means no limit. If not specified, a default of 8192 is used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">readTimeout</code></td><td>
|
||
|
|
<p>The time, in milliseconds, that Tomcat will wait for additional data
|
||
|
|
when a partial HTTP/2 frame has been received. Negative values will be
|
||
|
|
treated as an infinite timeout. If not specified, a default value of
|
||
|
|
<code>10000</code> will be used.</p>
|
||
|
|
</td></tr><tr><td><code class="attributeName">writeTimeout</code></td><td>
|
||
|
|
<p>The time, in milliseconds, that Tomcat will wait to write additional
|
||
|
|
data when an HTTP/2 frame has been partially written. Negative values will
|
||
|
|
be treated as an infinite timeout. If not specified, a default value of
|
||
|
|
<code>10000</code> will be used.</p>
|
||
|
|
</td></tr></table>
|
||
|
|
|
||
|
|
<p>The HTTP/2 upgrade protocol will also inherit the following limits from the
|
||
|
|
<a href="http.html">HTTP Connector</a> it is nested with:</p>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li>maxCookieCount</li>
|
||
|
|
<li>maxParameterCount</li>
|
||
|
|
<li>maxPostSize</li>
|
||
|
|
<li>maxSavePostSize</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</div></div>
|
||
|
|
|
||
|
|
</div><h3 id="Nested_Components">Nested Components</h3><div class="text">
|
||
|
|
|
||
|
|
<p>This component does not support any nested components.</p>
|
||
|
|
|
||
|
|
</div><h3 id="Special_Features">Special Features</h3><div class="text">
|
||
|
|
|
||
|
|
<p>This component does not support any special features.</p>
|
||
|
|
|
||
|
|
</div><div class="noprint"><h3 id="comments_section">
|
||
|
|
Comments
|
||
|
|
</h3><div class="text"><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
|
||
|
|
on improving documentation for Apache Tomcat.<br><br>
|
||
|
|
If you have trouble and need help, read
|
||
|
|
<a href="http://tomcat.apache.org/findhelp.html">Find Help</a> page
|
||
|
|
and ask your question on the tomcat-users
|
||
|
|
<a href="http://tomcat.apache.org/lists.html">mailing list</a>.
|
||
|
|
Do not ask such questions here. This is not a Q&A section.<br><br>
|
||
|
|
The Apache Comments System is explained <a href="../comments.html">here</a>.
|
||
|
|
Comments may be removed by our moderators if they are either
|
||
|
|
implemented or considered invalid/off-topic.
|
||
|
|
</p><div id="comments_thread"></div></div></div></div></div></div></div><footer><div id="footer">
|
||
|
|
Copyright © 1999-2017, The Apache Software Foundation
|
||
|
|
</div></footer></div></body></html>
|