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Built from 1defab0d2fb4457fafda0f645de24e5e7c28a95f
2014-12-02 18:34:48 +01:00
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Servant.API.Post</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[
window.onload = function () {pageLoad();setSynopsis("mini_Servant-API-Post.html");};
//]]>
Built from 55eb020d10e9134ea26bbf72c649d5079f7e7283
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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Servant-API-Post.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">servant-0.2: A family of combinators for defining webservices APIs and serving them</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Safe Haskell</th><td>None</td></tr><tr><th>Language</th><td>Haskell2010</td></tr></table><p class="caption">Servant.API.Post</p></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><span class="keyword">data</span> <a href="#t:Post">Post</a> a</li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><span class="keyword">data</span> <a name="t:Post" class="def">Post</a> a <a href="src/Servant-API-Post.html#Post" class="link">Source</a></p><div class="doc"><p>Endpoint for POST requests. The type variable represents the type of the
Built from 1defab0d2fb4457fafda0f645de24e5e7c28a95f
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response body (not the request body, use <code><a href="Servant-API-RQBody.html#t:RQBody">RQBody</a></code> for
that).</p><p>Example:</p><pre> -- POST /books
-- with a JSON encoded Book as the request body
-- returning the just-created Book
type MyApi = &quot;books&quot; :&gt; ReqBody Book :&gt; Post Book</pre></div><div class="subs instances"><p id="control.i:Post" class="caption collapser" onclick="toggleSection('i:Post')">Instances</p><div id="section.i:Post" class="show"><table><tr><td class="src"><a href="Servant-Utils-Links.html#t:VLinkHelper">VLinkHelper</a> * (<a href="Servant-API-Post.html#t:Post">Post</a> x)</td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a href="https://hackage.haskell.org/package/aeson-0.8.0.2/docs/Data-Aeson-Types.html#t:ToJSON">ToJSON</a> a =&gt; <a href="Servant-Server.html#t:HasServer">HasServer</a> (<a href="Servant-API-Post.html#t:Post">Post</a> a)</td><td class="doc"><p>When implementing the handler for a <code><a href="Servant-API-Post.html#t:Post">Post</a></code> endpoint,
just like for <code><a href="Servant-API-Delete.html#t:Delete">Delete</a></code>, <code><a href="Servant-API-Get.html#t:Get">Get</a></code>
and <code><a href="Servant-API-Put.html#t:Put">Put</a></code>, the handler code runs in the
<code>EitherT (Int, String) IO</code> monad, where the <code><a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Int.html#t:Int">Int</a></code> represents
the status code and the <code><a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-String.html#t:String">String</a></code> a message, returned in case of
failure. You can quite handily use <code><a href="Control-Monad-Trans-EitherT.html#v:left">left</a></code>
to quickly fail if some conditions are not met.</p><p>If successfully returning a value, we just require that its type has
a <code><a href="https://hackage.haskell.org/package/aeson-0.8.0.2/docs/Data-Aeson-Types.html#t:ToJSON">ToJSON</a></code> instance and servant takes care of encoding it for you,
yielding status code 201 along the way.</p></td></tr><tr><td class="src"><a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Typeable-Internal.html#t:Typeable">Typeable</a> (* -&gt; *) <a href="Servant-API-Post.html#t:Post">Post</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><span class="keyword">type</span> <a href="Servant-Server.html#t:Server">Server</a> (<a href="Servant-API-Post.html#t:Post">Post</a> a) = <a href="https://hackage.haskell.org/package/either-4.3.2/docs/Control-Monad-Trans-Either.html#t:EitherT">EitherT</a> (<a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-Int.html#t:Int">Int</a>, <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/Data-String.html#t:String">String</a>) <a href="https://hackage.haskell.org/package/base-4.7.0.1/docs/System-IO.html#t:IO">IO</a> a</td><td class="doc empty">&nbsp;</td></tr></table></div></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.15.0</p></div></body></html>
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