Cowboy 2.12, Cowlib 2.13, Gun 2.1

author: Loïc Hoguin <[email protected]> 2024-03-14 16:23:56 +0100
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+<h1 class="lined-header"><span>gun:await(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>gun:await - Wait for a response</p>
+<h2 id="_description">Description</h2>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><b><font color="#000000">await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>)
+    <font color="#990000">-&gt;</font> <b><font color="#000000">await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>, <font color="#993399">5000</font>, <font color="#009900">MonitorRef</font>)
+
+<b><font color="#000000">await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>, <font color="#009900">MonitorRef</font>)
+    <font color="#990000">-&gt;</font> <b><font color="#000000">await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>, <font color="#993399">5000</font>, <font color="#009900">MonitorRef</font>)
+
+<b><font color="#000000">await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>, <font color="#009900">Timeout</font>)
+    <font color="#990000">-&gt;</font> <b><font color="#000000">await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>, <font color="#009900">Timeout</font>, <font color="#009900">MonitorRef</font>)
+
+<b><font color="#000000">await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>, <font color="#009900">Timeout</font>, <font color="#009900">MonitorRef</font>)
+    <font color="#990000">-&gt;</font> <font color="#009900">Result</font>
+
+<font color="#009900">ConnPid</font>    <font color="#990000">::</font> <b><font color="#000080">pid</font></b>()
+<font color="#009900">StreamRef</font>  <font color="#990000">::</font> <b><font color="#000000">gun:stream_ref</font></b>()
+<font color="#009900">MonitorRef</font> <font color="#990000">::</font> <b><font color="#000080">reference</font></b>()
+<font color="#009900">Timeout</font>    <font color="#990000">::</font> <b><font color="#000000">timeout</font></b>()
+<font color="#009900">Result</font>     <font color="#990000">::</font> <b><font color="#000000">tuple</font></b>() <font color="#990000">-</font> <font color="#FF6600">see</font> <font color="#FF6600">below</font></tt></pre>
+</div></div>
+<p>Wait for a response.</p>
+<p>This function waits for a message from the given stream and returns it as a tuple. An error will be returned should the process fail or a relevant message is not received within the specified duration.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>ConnPid</dt>
+<dd><p>The pid of the Gun connection process.</p>
+</dd>
+<dt>StreamRef</dt>
+<dd><p>Identifier of the stream for the original request.</p>
+</dd>
+<dt>Timeout</dt>
+<dd><p>How long to wait for a message, in milliseconds.</p>
+</dd>
+<dt>MonitorRef</dt>
+<dd><p>Monitor for the Gun connection process.</p>
+<p>A monitor is automatically created for the duration of this call when one is not provided.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A number of different tuples can be returned. They correspond to the message of the same name and they contain the same elements minus the pid and stream reference. Error tuples may also be returned when a timeout or an error occur.</p>
+<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">Result</font> <font color="#990000">::</font> {<font color="#FF6600">inform</font>, <font color="#009900">Status</font>, <font color="#009900">Headers</font>}
+        | {<font color="#FF6600">response</font>, <font color="#009900">IsFin</font>, <font color="#009900">Status</font>, <font color="#009900">Headers</font>}
+        | {<font color="#FF6600">data</font>, <font color="#009900">IsFin</font>, <font color="#009900">Data</font>}
+        | {<font color="#FF6600">trailers</font>, <font color="#009900">Trailers</font>}
+        | {<font color="#FF6600">push</font>, <font color="#009900">NewStreamRef</font>, <font color="#009900">Method</font>, <font color="#009900">URI</font>, <font color="#009900">Headers</font>}
+        | {<font color="#FF6600">upgrade</font>, <font color="#009900">Protocols</font>, <font color="#009900">Headers</font>}
+        | {<font color="#FF6600">ws</font>, <font color="#009900">Frame</font>}
+        | {<font color="#FF6600">error</font>, <font color="#009900">Reason</font>}
+
+<font color="#009900">Reason</font> <font color="#990000">::</font> {<font color="#FF6600">stream_error</font> | <font color="#FF6600">connection_error</font> | <font color="#FF6600">down</font>, <b><font color="#000000">any</font></b>()}
+        | <font color="#FF6600">timeout</font></tt></pre>
+</div></div>
+<p>Because the messages and returned tuples are equivalent, please refer to the manual pages for each message for further information:</p>
+<ul><li><a href="../gun_inform">gun_inform(3)</a> - Informational response
+</li>
+<li><a href="../gun_response">gun_response(3)</a> - Response
+</li>
+<li><a href="../gun_data">gun_data(3)</a> - Response body
+</li>
+<li><a href="../gun_trailers">gun_trailers(3)</a> - Response trailers
+</li>
+<li><a href="../gun_push">gun_push(3)</a> - Server-initiated push
+</li>
+<li><a href="../gun_upgrade">gun_upgrade(3)</a> - Successful protocol upgrade
+</li>
+<li><a href="../gun_ws">gun_ws(3)</a> - Websocket frame
+</li>
+</ul>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>2.0</strong>: <code>upgrade</code> and <code>ws</code> tuples can now be returned.
+</li>
+<li><strong>2.0</strong>: The error tuple type now includes the type of error.
+</li>
+<li><strong>1.0</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Wait for a response</div>
+<div class="content"><!-- Generator: GNU source-highlight 3.1.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><font color="#009900">StreamRef</font> <font color="#990000">=</font> <b><font color="#000000">gun:get</font></b>(<font color="#009900">ConnPid</font>, <font color="#FF0000">"/articles"</font>, [
+    {<font color="#990000">&lt;&lt;</font><font color="#FF0000">"accept"</font><font color="#990000">&gt;&gt;</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"text/html;q=1.0, application/xml;q=0.1"</font><font color="#990000">&gt;&gt;</font>}
+])<font color="#990000">.</font>
+{<font color="#FF6600">response</font>, <font color="#FF6600">nofin</font>, <font color="#993399">200</font>, <font color="#009900">_Headers</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>)<font color="#990000">.</font>
+{<font color="#FF6600">data</font>, <font color="#FF6600">fin</font>, <font color="#990000">&lt;&lt;</font><font color="#FF0000">"Hello world!"</font><font color="#990000">&gt;&gt;</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>)<font color="#990000">.</font></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../gun">gun(3)</a>, <a href="../gun.get">gun:get(3)</a>, <a href="../gun.head">gun:head(3)</a>, <a href="../gun.options">gun:options(3)</a>, <a href="../gun.patch">gun:patch(3)</a>, <a href="../gun.post">gun:post(3)</a>, <a href="../gun.put">gun:put(3)</a>, <a href="../gun.delete">gun:delete(3)</a>, <a href="../gun.headers">gun:headers(3)</a>, <a href="../gun.request">gun:request(3)</a>, <a href="../gun.await_body">gun:await_body(3)</a></p>
+
+
+
+
+
+
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+
+<h3>
+	Gun
+	2.1
+	Function Reference
+	
+</h3>
+
+<ul>
+	
+		<li><a href="/docs/en/gun/2.1/guide">User Guide</a></li>
+	
+	
+		<li><a href="/docs/en/gun/2.1/manual">Function Reference</a></li>
+	
+	
+</ul>
+
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+	
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+	
+		<li><a href="/docs/en/gun/1.2/manual">1.2</a></li>
+	
+		<li><a href="/docs/en/gun/1.1/manual">1.1</a></li>
+	
+		<li><a href="/docs/en/gun/1.0/manual">1.0</a></li>
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author	Loïc Hoguin <[email protected]>	2024-03-14 16:23:56 +0100
committer	Loïc Hoguin <[email protected]>	2024-03-14 16:23:56 +0100
commit	5e05fe8e7877ffd6bc473b77b8ca0a12ad26bd67 (patch)
tree	cdfd7f160ae7cb2943b1e422140c25a2e8f00c4e /docs/en/gun/2.1/manual/gun.await/index.html
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