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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.eclipse.jetty.client</a></div>
<h2 title="Class HttpSender" class="title">Class HttpSender</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.eclipse.jetty.client.HttpSender</li>
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<dt>All Implemented Interfaces:</dt>
<dd><code>java.util.EventListener</code>, <code><a href="AsyncContentProvider.Listener.html" title="interface in org.eclipse.jetty.client">AsyncContentProvider.Listener</a></code></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="../fcgi/client/http/HttpSenderOverFCGI.html" title="class in org.eclipse.jetty.fcgi.client.http">HttpSenderOverFCGI</a></code>, <code><a href="http/HttpSenderOverHTTP.html" title="class in org.eclipse.jetty.client.http">HttpSenderOverHTTP</a></code>, <code><a href="../http2/client/http/HttpSenderOverHTTP2.html" title="class in org.eclipse.jetty.http2.client.http">HttpSenderOverHTTP2</a></code></dd>
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<pre>public abstract class <span class="typeNameLabel">HttpSender</span>
extends java.lang.Object
implements <a href="AsyncContentProvider.Listener.html" title="interface in org.eclipse.jetty.client">AsyncContentProvider.Listener</a></pre>
<div class="block"><a href="HttpSender.html" title="class in org.eclipse.jetty.client"><code>HttpSender</code></a> abstracts the algorithm to send HTTP requests, so that subclasses only implement
the transport-specific code to send requests over the wire, implementing
<a href="#sendHeaders(org.eclipse.jetty.client.HttpExchange,org.eclipse.jetty.client.HttpContent,org.eclipse.jetty.util.Callback)"><code>sendHeaders(HttpExchange, HttpContent, Callback)</code></a> and
<a href="#sendContent(org.eclipse.jetty.client.HttpExchange,org.eclipse.jetty.client.HttpContent,org.eclipse.jetty.util.Callback)"><code>sendContent(HttpExchange, HttpContent, Callback)</code></a>.
<p>
<a href="HttpSender.html" title="class in org.eclipse.jetty.client"><code>HttpSender</code></a> governs two state machines.
<p>
The request state machine is updated by <a href="HttpSender.html" title="class in org.eclipse.jetty.client"><code>HttpSender</code></a> as the various steps of sending a request
are executed, see <code>RequestState</code>.
At any point in time, a user thread may abort the request, which may (if the request has not been
completely sent yet) move the request state machine to <code>RequestState#FAILURE</code>.
The request state machine guarantees that the request steps are executed (by I/O threads) only if
the request has not been failed already.
<p>
The sender state machine is updated by <a href="HttpSender.html" title="class in org.eclipse.jetty.client"><code>HttpSender</code></a> from three sources: deferred content notifications
(via <a href="#onContent()"><code>onContent()</code></a>), 100-continue notifications (via <a href="#proceed(org.eclipse.jetty.client.HttpExchange,java.lang.Throwable)"><code>proceed(HttpExchange, Throwable)</code></a>)
and normal request send (via <a href="#sendContent(org.eclipse.jetty.client.HttpExchange,org.eclipse.jetty.client.HttpContent,org.eclipse.jetty.util.Callback)"><code>sendContent(HttpExchange, HttpContent, Callback)</code></a>).
This state machine must guarantee that the request sending is never executed concurrently: only one of
those sources may trigger the call to <a href="#sendContent(org.eclipse.jetty.client.HttpExchange,org.eclipse.jetty.client.HttpContent,org.eclipse.jetty.util.Callback)"><code>sendContent(HttpExchange, HttpContent, Callback)</code></a>.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="HttpReceiver.html" title="class in org.eclipse.jetty.client"><code>HttpReceiver</code></a></dd>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
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<td class="colFirst"><code>protected static <a href="../util/log/Logger.html" title="interface in org.eclipse.jetty.util.log">Logger</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#LOG">LOG</a></span></code></th>
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<th class="colFirst" scope="col">Modifier</th>
<th class="colSecond" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.eclipse.jetty.client.HttpChannel)">HttpSender</a></span>&#8203;(<a href="HttpChannel.html" title="class in org.eclipse.jetty.client">HttpChannel</a>&nbsp;channel)</code></th>
<td class="colLast">&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#abort(org.eclipse.jetty.client.HttpExchange,java.lang.Throwable)">abort</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
java.lang.Throwable&nbsp;failure)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#beginToHeaders(org.eclipse.jetty.client.HttpExchange)">beginToHeaders</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#dispose()">dispose</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#expects100Continue(org.eclipse.jetty.client.api.Request)">expects100Continue</a></span>&#8203;(<a href="api/Request.html" title="interface in org.eclipse.jetty.client.api">Request</a>&nbsp;request)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>protected <a href="HttpChannel.html" title="class in org.eclipse.jetty.client">HttpChannel</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHttpChannel()">getHttpChannel</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>protected <a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHttpExchange()">getHttpExchange</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#headersToCommit(org.eclipse.jetty.client.HttpExchange)">headersToCommit</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isFailed()">isFailed</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onContent()">onContent</a></span>()</code></th>
<td class="colLast">
<div class="block">Callback method invoked when content is available</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#proceed(org.eclipse.jetty.client.HttpExchange,java.lang.Throwable)">proceed</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
java.lang.Throwable&nbsp;failure)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#queuedToBegin(org.eclipse.jetty.client.HttpExchange)">queuedToBegin</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset()">reset</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#send(org.eclipse.jetty.client.HttpExchange)">send</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>protected abstract void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sendContent(org.eclipse.jetty.client.HttpExchange,org.eclipse.jetty.client.HttpContent,org.eclipse.jetty.util.Callback)">sendContent</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
<a href="HttpContent.html" title="class in org.eclipse.jetty.client">HttpContent</a>&nbsp;content,
<a href="../util/Callback.html" title="interface in org.eclipse.jetty.util">Callback</a>&nbsp;callback)</code></th>
<td class="colLast">
<div class="block">Implementations should send the content at the <a href="HttpContent.html" title="class in org.eclipse.jetty.client"><code>HttpContent</code></a> cursor position over the wire.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>protected abstract void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sendHeaders(org.eclipse.jetty.client.HttpExchange,org.eclipse.jetty.client.HttpContent,org.eclipse.jetty.util.Callback)">sendHeaders</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
<a href="HttpContent.html" title="class in org.eclipse.jetty.client">HttpContent</a>&nbsp;content,
<a href="../util/Callback.html" title="interface in org.eclipse.jetty.util">Callback</a>&nbsp;callback)</code></th>
<td class="colLast">
<div class="block">Implementations should send the HTTP headers over the wire, possibly with some content,
in a single write, and notify the given <code>callback</code> of the result of this operation.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#someToContent(org.eclipse.jetty.client.HttpExchange,java.nio.ByteBuffer)">someToContent</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
java.nio.ByteBuffer&nbsp;content)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#someToSuccess(org.eclipse.jetty.client.HttpExchange)">someToSuccess</a></span>&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString()">toString</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<pre>protected static final&nbsp;<a href="../util/log/Logger.html" title="interface in org.eclipse.jetty.util.log">Logger</a> LOG</pre>
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<h4>HttpSender</h4>
<pre>protected&nbsp;HttpSender&#8203;(<a href="HttpChannel.html" title="class in org.eclipse.jetty.client">HttpChannel</a>&nbsp;channel)</pre>
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<pre class="methodSignature">protected&nbsp;<a href="HttpChannel.html" title="class in org.eclipse.jetty.client">HttpChannel</a>&nbsp;getHttpChannel()</pre>
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<pre class="methodSignature">protected&nbsp;<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;getHttpExchange()</pre>
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<pre class="methodSignature">public&nbsp;boolean&nbsp;isFailed()</pre>
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<pre class="methodSignature">public&nbsp;void&nbsp;onContent()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AsyncContentProvider.Listener.html#onContent()">AsyncContentProvider.Listener</a></code></span></div>
<div class="block">Callback method invoked when content is available</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AsyncContentProvider.Listener.html#onContent()">onContent</a></code>&nbsp;in interface&nbsp;<code><a href="AsyncContentProvider.Listener.html" title="interface in org.eclipse.jetty.client">AsyncContentProvider.Listener</a></code></dd>
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<h4>send</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;send&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</pre>
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<pre class="methodSignature">protected&nbsp;boolean&nbsp;expects100Continue&#8203;(<a href="api/Request.html" title="interface in org.eclipse.jetty.client.api">Request</a>&nbsp;request)</pre>
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<pre class="methodSignature">protected&nbsp;boolean&nbsp;queuedToBegin&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</pre>
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<pre class="methodSignature">protected&nbsp;boolean&nbsp;beginToHeaders&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</pre>
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<pre class="methodSignature">protected&nbsp;boolean&nbsp;headersToCommit&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</pre>
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<h4>someToContent</h4>
<pre class="methodSignature">protected&nbsp;boolean&nbsp;someToContent&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
java.nio.ByteBuffer&nbsp;content)</pre>
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<pre class="methodSignature">protected&nbsp;boolean&nbsp;someToSuccess&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange)</pre>
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<h4>sendHeaders</h4>
<pre class="methodSignature">protected abstract&nbsp;void&nbsp;sendHeaders&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
<a href="HttpContent.html" title="class in org.eclipse.jetty.client">HttpContent</a>&nbsp;content,
<a href="../util/Callback.html" title="interface in org.eclipse.jetty.util">Callback</a>&nbsp;callback)</pre>
<div class="block">Implementations should send the HTTP headers over the wire, possibly with some content,
in a single write, and notify the given <code>callback</code> of the result of this operation.
<p>
If there is more content to send, then <a href="#sendContent(org.eclipse.jetty.client.HttpExchange,org.eclipse.jetty.client.HttpContent,org.eclipse.jetty.util.Callback)"><code>sendContent(HttpExchange, HttpContent, Callback)</code></a>
will be invoked.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>exchange</code> - the exchange to send</dd>
<dd><code>content</code> - the content to send</dd>
<dd><code>callback</code> - the callback to notify</dd>
</dl>
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<pre class="methodSignature">protected abstract&nbsp;void&nbsp;sendContent&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
<a href="HttpContent.html" title="class in org.eclipse.jetty.client">HttpContent</a>&nbsp;content,
<a href="../util/Callback.html" title="interface in org.eclipse.jetty.util">Callback</a>&nbsp;callback)</pre>
<div class="block">Implementations should send the content at the <a href="HttpContent.html" title="class in org.eclipse.jetty.client"><code>HttpContent</code></a> cursor position over the wire.
<p>
The <a href="HttpContent.html" title="class in org.eclipse.jetty.client"><code>HttpContent</code></a> cursor is advanced by HttpSender at the right time, and if more
content needs to be sent, this method is invoked again; subclasses need only to send the content
at the <a href="HttpContent.html" title="class in org.eclipse.jetty.client"><code>HttpContent</code></a> cursor position.
<p>
This method is invoked one last time when <a href="HttpContent.html#isConsumed()"><code>HttpContent.isConsumed()</code></a> is true and therefore
there is no actual content to send.
This is done to allow subclasses to write "terminal" bytes (such as the terminal chunk when the
transfer encoding is chunked) if their protocol needs to.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>exchange</code> - the exchange to send</dd>
<dd><code>content</code> - the content to send</dd>
<dd><code>callback</code> - the callback to notify</dd>
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<pre class="methodSignature">protected&nbsp;void&nbsp;reset()</pre>
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<pre class="methodSignature">protected&nbsp;void&nbsp;dispose()</pre>
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<pre class="methodSignature">public&nbsp;void&nbsp;proceed&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
java.lang.Throwable&nbsp;failure)</pre>
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<pre class="methodSignature">public&nbsp;boolean&nbsp;abort&#8203;(<a href="HttpExchange.html" title="class in org.eclipse.jetty.client">HttpExchange</a>&nbsp;exchange,
java.lang.Throwable&nbsp;failure)</pre>
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<pre class="methodSignature">public&nbsp;java.lang.String&nbsp;toString()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>toString</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
</dl>
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