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      <h1 class="title">std/asynchttpserver</h1>
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  <li>
  <a class="reference reference-toplevel" href="#6" id="56">Imports</a>
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  <details open>
    <summary><a class="reference reference-toplevel" href="#7" id="57">Types</a></summary>
    <ul class="simple simple-toc-section">
      <li><a class="reference" href="#AsyncHttpServer" title="AsyncHttpServer = ref object
  ## The maximum content-length that will be read for the body.">AsyncHttpServer</a></li>
<li><a class="reference" href="#Request" title="Request = object
  client*: AsyncSocket
  reqMethod*: HttpMethod
  headers*: HttpHeaders
  protocol*: tuple[orig: string, major, minor: int]
  url*: Uri
  hostname*: string          ## The hostname of the client that made the request.
  body*: string">Request</a></li>

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<li>
  <details open>
    <summary><a class="reference reference-toplevel" href="#10" id="60">Consts</a></summary>
    <ul class="simple simple-toc-section">
      <li><a class="reference" href="#nimMaxDescriptorsFallback" title="nimMaxDescriptorsFallback {.intdefine.} = 16000">nimMaxDescriptorsFallback</a></li>

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  <details open>
    <summary><a class="reference reference-toplevel" href="#12" id="62">Procs</a></summary>
    <ul class="simple simple-toc-section">
      <ul class="simple nested-toc-section">acceptRequest
  <li><a class="reference" href="#acceptRequest%2CAsyncHttpServer%2Cproc%28Request%29" title="acceptRequest(server: AsyncHttpServer; callback: proc (request: Request): Future[
    void] {.closure, gcsafe.}): owned(Future[void])">acceptRequest(server: AsyncHttpServer; callback: proc (request: Request): Future[
    void] {.closure, gcsafe.}): owned(Future[void])</a></li>

</ul>
<ul class="simple nested-toc-section">close
  <li><a class="reference" href="#close%2CAsyncHttpServer" title="close(server: AsyncHttpServer)">close(server: AsyncHttpServer)</a></li>

</ul>
<ul class="simple nested-toc-section">getPort
  <li><a class="reference" href="#getPort%2CAsyncHttpServer" title="getPort(self: AsyncHttpServer): Port">getPort(self: AsyncHttpServer): Port</a></li>

</ul>
<ul class="simple nested-toc-section">listen
  <li><a class="reference" href="#listen%2CAsyncHttpServer%2CPort%2Cstring" title="listen(server: AsyncHttpServer; port: Port; address = &quot;&quot;; domain = AF_INET)">listen(server: AsyncHttpServer; port: Port; address = &quot;&quot;; domain = AF_INET)</a></li>

</ul>
<ul class="simple nested-toc-section">newAsyncHttpServer
  <li><a class="reference" href="#newAsyncHttpServer%2Cint" title="newAsyncHttpServer(reuseAddr = true; reusePort = false; maxBody = 8388608): AsyncHttpServer">newAsyncHttpServer(reuseAddr = true; reusePort = false; maxBody = 8388608): AsyncHttpServer</a></li>

</ul>
<ul class="simple nested-toc-section">respond
  <li><a class="reference" href="#respond%2CRequest%2CHttpCode%2Cstring%2CHttpHeaders" title="respond(req: Request; code: HttpCode; content: string;
        headers: HttpHeaders = nil): Future[void]">respond(req: Request; code: HttpCode; content: string;
        headers: HttpHeaders = nil): Future[void]</a></li>

</ul>
<ul class="simple nested-toc-section">sendHeaders
  <li><a class="reference" href="#sendHeaders%2CRequest%2CHttpHeaders" title="sendHeaders(req: Request; headers: HttpHeaders): Future[void]">sendHeaders(req: Request; headers: HttpHeaders): Future[void]</a></li>

</ul>
<ul class="simple nested-toc-section">serve
  <li><a class="reference" href="#serve%2CAsyncHttpServer%2CPort%2Cproc%28Request%29%2Cstring%2Cint" title="serve(server: AsyncHttpServer; port: Port;
      callback: proc (request: Request): Future[void] {.closure, gcsafe.};
      address = &quot;&quot;; assumedDescriptorsPerRequest = -1; domain = AF_INET): owned(
    Future[void])">serve(server: AsyncHttpServer; port: Port;
      callback: proc (request: Request): Future[void] {.closure, gcsafe.};
      address = &quot;&quot;; assumedDescriptorsPerRequest = -1; domain = AF_INET): owned(
    Future[void])</a></li>

</ul>
<ul class="simple nested-toc-section">shouldAcceptRequest
  <li><a class="reference" href="#shouldAcceptRequest%2CAsyncHttpServer%2Cint" title="shouldAcceptRequest(server: AsyncHttpServer; assumedDescriptorsPerRequest = 5): bool">shouldAcceptRequest(server: AsyncHttpServer; assumedDescriptorsPerRequest = 5): bool</a></li>

</ul>

    </ul>
  </details>
</li>

</ul>

  </div>
  <div class="nine columns" id="content">
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L1" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L1" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

    <div id="tocRoot"></div>
    
    <p class="module-desc"><p>This module implements a high performance asynchronous HTTP server.</p>
<p>This HTTP server has not been designed to be used in production, but for testing applications locally. Because of this, when deploying your application in production you should use a reverse proxy (for example nginx) instead of allowing users to connect directly to this server.</p>

<p><strong class="examples_text">Example: cmd: -r:off</strong></p>
<pre class="listing"><span class="Keyword">import</span> <span class="Identifier">std</span><span class="Operator">/</span><span class="Identifier">asynchttpserver</span>
<span class="Comment"># This example will create an HTTP server on an automatically chosen port.</span>
<span class="Comment"># It will respond to all requests with a `200 OK` response code and &quot;Hello World&quot;</span>
<span class="Comment"># as the response body.</span>
<span class="Keyword">import</span> <span class="Identifier">std</span><span class="Operator">/</span><span class="Identifier">asyncdispatch</span>
<span class="Keyword">proc</span> <span class="Identifier">main</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">async</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span>
  <span class="Keyword">var</span> <span class="Identifier">server</span> <span class="Operator">=</span> <span class="Identifier">newAsyncHttpServer</span><span class="Punctuation">(</span><span class="Punctuation">)</span>
  <span class="Keyword">proc</span> <span class="Identifier">cb</span><span class="Punctuation">(</span><span class="Identifier">req</span><span class="Punctuation">:</span> <span class="Identifier">Request</span><span class="Punctuation">)</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">async</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span>
    <span class="Identifier">echo</span> <span class="Punctuation">(</span><span class="Identifier">req</span><span class="Operator">.</span><span class="Identifier">reqMethod</span><span class="Punctuation">,</span> <span class="Identifier">req</span><span class="Operator">.</span><span class="Identifier">url</span><span class="Punctuation">,</span> <span class="Identifier">req</span><span class="Operator">.</span><span class="Identifier">headers</span><span class="Punctuation">)</span>
    <span class="Keyword">let</span> <span class="Identifier">headers</span> <span class="Operator">=</span> <span class="Punctuation">{</span><span class="StringLit">&quot;Content-type&quot;</span><span class="Punctuation">:</span> <span class="StringLit">&quot;text/plain; charset=utf-8&quot;</span><span class="Punctuation">}</span>
    <span class="Identifier">await</span> <span class="Identifier">req</span><span class="Operator">.</span><span class="Identifier">respond</span><span class="Punctuation">(</span><span class="Identifier">Http200</span><span class="Punctuation">,</span> <span class="StringLit">&quot;Hello World&quot;</span><span class="Punctuation">,</span> <span class="Identifier">headers</span><span class="Operator">.</span><span class="Identifier">newHttpHeaders</span><span class="Punctuation">(</span><span class="Punctuation">)</span><span class="Punctuation">)</span>

  <span class="Identifier">server</span><span class="Operator">.</span><span class="Identifier">listen</span><span class="Punctuation">(</span><span class="Identifier">Port</span><span class="Punctuation">(</span><span class="DecNumber">0</span><span class="Punctuation">)</span><span class="Punctuation">)</span> <span class="Comment"># or Port(8080) to hardcode the standard HTTP port.</span>
  <span class="Keyword">let</span> <span class="Identifier">port</span> <span class="Operator">=</span> <span class="Identifier">server</span><span class="Operator">.</span><span class="Identifier">getPort</span>
  <span class="Identifier">echo</span> <span class="StringLit">&quot;test this with: curl localhost:&quot;</span> <span class="Operator">&amp;</span> <span class="Operator">$</span><span class="Identifier">port</span><span class="Operator">.</span><span class="Identifier">uint16</span> <span class="Operator">&amp;</span> <span class="StringLit">&quot;/&quot;</span>
  <span class="Keyword">while</span> <span class="Identifier">true</span><span class="Punctuation">:</span>
    <span class="Keyword">if</span> <span class="Identifier">server</span><span class="Operator">.</span><span class="Identifier">shouldAcceptRequest</span><span class="Punctuation">(</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
      <span class="Identifier">await</span> <span class="Identifier">server</span><span class="Operator">.</span><span class="Identifier">acceptRequest</span><span class="Punctuation">(</span><span class="Identifier">cb</span><span class="Punctuation">)</span>
    <span class="Keyword">else</span><span class="Punctuation">:</span>
      <span class="Comment"># too many concurrent connections, `maxFDs` exceeded</span>
      <span class="Comment"># wait 500ms for FDs to be closed</span>
      <span class="Identifier">await</span> <span class="Identifier">sleepAsync</span><span class="Punctuation">(</span><span class="DecNumber">500</span><span class="Punctuation">)</span>

<span class="Identifier">waitFor</span> <span class="Identifier">main</span><span class="Punctuation">(</span><span class="Punctuation">)</span></pre></p>
    <div class="section" id="6">
  <h1><a class="toc-backref" href="#6">Imports</a></h1>
  <dl class="item">
    <a class="reference external" href="asyncnet.html">asyncnet</a>, <a class="reference external" href="asyncdispatch.html">asyncdispatch</a>, <a class="reference external" href="parseutils.html">parseutils</a>, <a class="reference external" href="uri.html">uri</a>, <a class="reference external" href="strutils.html">strutils</a>, <a class="reference external" href="httpcore.html">httpcore</a>, <a class="reference external" href="nativesockets.html">nativesockets</a>, <a class="reference external" href="since.html">since</a>, <a class="reference external" href="assertions.html">assertions</a>
  </dl>
</div>
<div class="section" id="7">
  <h1><a class="toc-backref" href="#7">Types</a></h1>
  <dl class="item">
    <div id="AsyncHttpServer">
  <dt><pre><a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a> <span class="Other">=</span> <span class="Keyword">ref</span> <span class="Keyword">object</span>
  <span class="Comment">## The maximum content-length that will be read for the body.</span></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L70" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L70" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>
<div id="Request">
  <dt><pre><a href="asynchttpserver.html#Request"><span class="Identifier">Request</span></a> <span class="Other">=</span> <span class="Keyword">object</span>
  <span class="Identifier">client</span><span class="Operator">*</span><span class="Other">:</span> <a href="asyncnet.html#AsyncSocket"><span class="Identifier">AsyncSocket</span></a>
  <span class="Identifier">reqMethod</span><span class="Operator">*</span><span class="Other">:</span> <a href="httpcore.html#HttpMethod"><span class="Identifier">HttpMethod</span></a>
  <span class="Identifier">headers</span><span class="Operator">*</span><span class="Other">:</span> <a href="httpcore.html#HttpHeaders"><span class="Identifier">HttpHeaders</span></a>
  <span class="Identifier">protocol</span><span class="Operator">*</span><span class="Other">:</span> <span class="Keyword">tuple</span><span class="Other">[</span><span class="Identifier">orig</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a><span class="Other">,</span> <span class="Identifier">major</span><span class="Other">,</span> <span class="Identifier">minor</span><span class="Other">:</span> <a href="system.html#int"><span class="Identifier">int</span></a><span class="Other">]</span>
  <span class="Identifier">url</span><span class="Operator">*</span><span class="Other">:</span> <a href="uri.html#Uri"><span class="Identifier">Uri</span></a>
  <span class="Identifier">hostname</span><span class="Operator">*</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a>          <span class="Comment">## The hostname of the client that made the request.</span>
  <span class="Identifier">body</span><span class="Operator">*</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a></pre></dt>
  <dd>
    
    
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L61" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L61" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

  </dl>
</div>
<div class="section" id="10">
  <h1><a class="toc-backref" href="#10">Consts</a></h1>
  <dl class="item">
    <div id="nimMaxDescriptorsFallback">
  <dt><pre><a href="asynchttpserver.html#nimMaxDescriptorsFallback"><span class="Identifier">nimMaxDescriptorsFallback</span></a> {.<span class="Identifier">intdefine</span>.} <span class="Other">=</span> <span class="DecNumber">16000</span></pre></dt>
  <dd>
    
    fallback value for 
when <tt class="docutils literal"><span class="pre"><span class="Identifier">maxDescriptors</span></span></tt> is not available. This can be set on the command line during compilation via <tt class="docutils literal"><span class="pre"><span class="Operator">-</span><span class="Identifier">d</span><span class="Punctuation">:</span><span class="Identifier">nimMaxDescriptorsFallback</span><span class="Operator">=</span><span class="Identifier">N</span></span></tt>
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L377" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L377" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

  </dl>
</div>
<div class="section" id="12">
  <h1><a class="toc-backref" href="#12">Procs</a></h1>
  <dl class="item">
    <div id="acceptRequest-procs-all">
  <div id="acceptRequest,AsyncHttpServer,proc(Request)">
  <dt><pre><span class="Keyword">proc</span> <a href="#acceptRequest%2CAsyncHttpServer%2Cproc%28Request%29"><span class="Identifier">acceptRequest</span></a><span class="Other">(</span><span class="Identifier">server</span><span class="Other">:</span> <a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a><span class="Other">;</span> <span class="Identifier">callback</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Identifier">request</span><span class="Other">:</span> <a href="asynchttpserver.html#Request"><span class="Identifier">Request</span></a><span class="Other">)</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span>
    <a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span> {.<span class="Identifier">closure</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">)</span><span class="Other">:</span> <a href="system.html#owned"><span class="Identifier">owned</span></a><span class="Other">(</span><a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">stackTrace</span><span class="Other">:</span> <span class="DecNumber">false</span><span class="Other">,</span>
    <span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">,</span> <span class="Identifier">ValueError</span><span class="Other">,</span> <span class="Identifier">OSError</span><span class="Other">,</span> <span class="Identifier">SslError</span><span class="Other">,</span> <span class="Identifier">LibraryError</span><span class="Other">,</span> <span class="Identifier">KeyError</span><span class="Other">]</span><span class="Other">,</span>
    <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Accepts a single request. Write an explicit loop around this proc so that errors can be handled properly.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L406" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L406" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="close-procs-all">
  <div id="close,AsyncHttpServer">
  <dt><pre><span class="Keyword">proc</span> <a href="#close%2CAsyncHttpServer"><span class="Identifier">close</span></a><span class="Other">(</span><span class="Identifier">server</span><span class="Other">:</span> <a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">LibraryError</span><span class="Other">,</span> <span class="Identifier">Exception</span><span class="Other">,</span> <span class="Identifier">SslError</span><span class="Other">]</span><span class="Other">,</span>
                                      <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Terminates the async http server instance.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L439" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L439" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="getPort-procs-all">
  <div id="getPort,AsyncHttpServer">
  <dt><pre><span class="Keyword">proc</span> <a href="#getPort%2CAsyncHttpServer"><span class="Identifier">getPort</span></a><span class="Other">(</span><span class="Identifier">self</span><span class="Other">:</span> <a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a><span class="Other">)</span><span class="Other">:</span> <a href="nativesockets.html#Port"><span class="Identifier">Port</span></a> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">OSError</span><span class="Other">,</span> <span class="Identifier">Exception</span><span class="Other">]</span><span class="Other">,</span>
    <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    <p>Returns the port <tt class="docutils literal"><span class="pre"><span class="Identifier">self</span></span></tt> was bound to.</p>
<p>Useful for identifying what port <tt class="docutils literal"><span class="pre"><span class="Identifier">self</span></span></tt> is bound to, if it was chosen automatically, for example via <tt class="docutils literal"><span class="pre"><span class="Identifier">listen</span><span class="Punctuation">(</span><span class="Identifier">Port</span><span class="Punctuation">(</span><span class="DecNumber">0</span><span class="Punctuation">)</span><span class="Punctuation">)</span></span></tt>.</p>

<p><strong class="examples_text">Example:</strong></p>
<pre class="listing"><span class="Keyword">from</span> <span class="Identifier">std</span><span class="Operator">/</span><span class="Identifier">nativesockets</span> <span class="Keyword">import</span> <span class="Identifier">Port</span>
<span class="Keyword">let</span> <span class="Identifier">server</span> <span class="Operator">=</span> <span class="Identifier">newAsyncHttpServer</span><span class="Punctuation">(</span><span class="Punctuation">)</span>
<span class="Identifier">server</span><span class="Operator">.</span><span class="Identifier">listen</span><span class="Punctuation">(</span><span class="Identifier">Port</span><span class="Punctuation">(</span><span class="DecNumber">0</span><span class="Punctuation">)</span><span class="Punctuation">)</span>
<span class="Identifier">assert</span> <span class="Identifier">server</span><span class="Operator">.</span><span class="Identifier">getPort</span><span class="Operator">.</span><span class="Identifier">uint16</span> <span class="Operator">&gt;</span> <span class="DecNumber">0</span>
<span class="Identifier">server</span><span class="Operator">.</span><span class="Identifier">close</span><span class="Punctuation">(</span><span class="Punctuation">)</span></pre>
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L77" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L77" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="listen-procs-all">
  <div id="listen,AsyncHttpServer,Port,string">
  <dt><pre><span class="Keyword">proc</span> <a href="#listen%2CAsyncHttpServer%2CPort%2Cstring"><span class="Identifier">listen</span></a><span class="Other">(</span><span class="Identifier">server</span><span class="Other">:</span> <a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a><span class="Other">;</span> <span class="Identifier">port</span><span class="Other">:</span> <a href="nativesockets.html#Port"><span class="Identifier">Port</span></a><span class="Other">;</span> <span class="Identifier">address</span> <span class="Other">=</span> <span class="StringLit">&quot;&quot;</span><span class="Other">;</span> <span class="Identifier">domain</span> <span class="Other">=</span> <span class="Identifier">AF_INET</span><span class="Other">)</span> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">OSError</span><span class="Other">,</span> <span class="Identifier">ValueError</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">WriteIOEffect</span><span class="Other">,</span> <span class="Identifier">ReadIOEffect</span><span class="Other">]</span><span class="Other">,</span>
    <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Listen to the given port and address.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L382" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L382" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="newAsyncHttpServer-procs-all">
  <div id="newAsyncHttpServer,int">
  <dt><pre><span class="Keyword">proc</span> <a href="#newAsyncHttpServer%2Cint"><span class="Identifier">newAsyncHttpServer</span></a><span class="Other">(</span><span class="Identifier">reuseAddr</span> <span class="Other">=</span> <span class="Identifier">true</span><span class="Other">;</span> <span class="Identifier">reusePort</span> <span class="Other">=</span> <span class="Identifier">false</span><span class="Other">;</span> <span class="Identifier">maxBody</span> <span class="Other">=</span> <span class="DecNumber">8388608</span><span class="Other">)</span><span class="Other">:</span> <a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Creates a new <tt class="docutils literal"><span class="pre"><span class="Identifier">AsyncHttpServer</span></span></tt> instance.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L90" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L90" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="respond-procs-all">
  <div id="respond,Request,HttpCode,string,HttpHeaders">
  <dt><pre><span class="Keyword">proc</span> <a href="#respond%2CRequest%2CHttpCode%2Cstring%2CHttpHeaders"><span class="Identifier">respond</span></a><span class="Other">(</span><span class="Identifier">req</span><span class="Other">:</span> <a href="asynchttpserver.html#Request"><span class="Identifier">Request</span></a><span class="Other">;</span> <span class="Identifier">code</span><span class="Other">:</span> <a href="httpcore.html#HttpCode"><span class="Identifier">HttpCode</span></a><span class="Other">;</span> <span class="Identifier">content</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a><span class="Other">;</span>
             <span class="Identifier">headers</span><span class="Other">:</span> <a href="httpcore.html#HttpHeaders"><span class="Identifier">HttpHeaders</span></a> <span class="Other">=</span> <span class="Keyword">nil</span><span class="Other">)</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">,</span> <span class="Identifier">SslError</span><span class="Other">,</span> <span class="Identifier">ValueError</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    <p>Responds to the request with the specified <tt class="docutils literal"><span class="pre"><span class="Identifier">HttpCode</span></span></tt>, headers and content.</p>
<p>This procedure will <strong>not</strong> close the client socket.</p>
<p>Example:</p>
<p><pre class="listing"><span class="Keyword">import</span> <span class="Identifier">std</span><span class="Operator">/</span><span class="Identifier">json</span>
<span class="Keyword">proc</span> <span class="Identifier">handler</span><span class="Punctuation">(</span><span class="Identifier">req</span><span class="Punctuation">:</span> <span class="Identifier">Request</span><span class="Punctuation">)</span> <span class="Punctuation">{</span><span class="Operator">.</span><span class="Identifier">async</span><span class="Operator">.</span><span class="Punctuation">}</span> <span class="Operator">=</span>
  <span class="Keyword">if</span> <span class="Identifier">req</span><span class="Operator">.</span><span class="Identifier">url</span><span class="Operator">.</span><span class="Identifier">path</span> <span class="Operator">==</span> <span class="StringLit">&quot;/hello-world&quot;</span><span class="Punctuation">:</span>
    <span class="Keyword">let</span> <span class="Identifier">msg</span> <span class="Operator">=</span> <span class="Operator">%*</span> <span class="Punctuation">{</span><span class="StringLit">&quot;message&quot;</span><span class="Punctuation">:</span> <span class="StringLit">&quot;Hello World&quot;</span><span class="Punctuation">}</span>
    <span class="Keyword">let</span> <span class="Identifier">headers</span> <span class="Operator">=</span> <span class="Identifier">newHttpHeaders</span><span class="Punctuation">(</span><span class="Punctuation">[</span><span class="Punctuation">(</span><span class="StringLit">&quot;Content-Type&quot;</span><span class="Punctuation">,</span><span class="StringLit">&quot;application/json&quot;</span><span class="Punctuation">)</span><span class="Punctuation">]</span><span class="Punctuation">)</span>
    <span class="Identifier">await</span> <span class="Identifier">req</span><span class="Operator">.</span><span class="Identifier">respond</span><span class="Punctuation">(</span><span class="Identifier">Http200</span><span class="Punctuation">,</span> <span class="Operator">$</span><span class="Identifier">msg</span><span class="Punctuation">,</span> <span class="Identifier">headers</span><span class="Punctuation">)</span>
  <span class="Keyword">else</span><span class="Punctuation">:</span>
    <span class="Identifier">await</span> <span class="Identifier">req</span><span class="Operator">.</span><span class="Identifier">respond</span><span class="Punctuation">(</span><span class="Identifier">Http404</span><span class="Punctuation">,</span> <span class="StringLit">&quot;Not Found&quot;</span><span class="Punctuation">)</span></pre></p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L105" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L105" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="sendHeaders-procs-all">
  <div id="sendHeaders,Request,HttpHeaders">
  <dt><pre><span class="Keyword">proc</span> <a href="#sendHeaders%2CRequest%2CHttpHeaders"><span class="Identifier">sendHeaders</span></a><span class="Other">(</span><span class="Identifier">req</span><span class="Other">:</span> <a href="asynchttpserver.html#Request"><span class="Identifier">Request</span></a><span class="Other">;</span> <span class="Identifier">headers</span><span class="Other">:</span> <a href="httpcore.html#HttpHeaders"><span class="Identifier">HttpHeaders</span></a><span class="Other">)</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span> {.
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">,</span> <span class="Identifier">SslError</span><span class="Other">,</span> <span class="Identifier">ValueError</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Sends the specified headers to the requesting client.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L99" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L99" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="serve-procs-all">
  <div id="serve,AsyncHttpServer,Port,proc(Request),string,int">
  <dt><pre><span class="Keyword">proc</span> <a href="#serve%2CAsyncHttpServer%2CPort%2Cproc%28Request%29%2Cstring%2Cint"><span class="Identifier">serve</span></a><span class="Other">(</span><span class="Identifier">server</span><span class="Other">:</span> <a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a><span class="Other">;</span> <span class="Identifier">port</span><span class="Other">:</span> <a href="nativesockets.html#Port"><span class="Identifier">Port</span></a><span class="Other">;</span>
           <span class="Identifier">callback</span><span class="Other">:</span> <span class="Keyword">proc</span> <span class="Other">(</span><span class="Identifier">request</span><span class="Other">:</span> <a href="asynchttpserver.html#Request"><span class="Identifier">Request</span></a><span class="Other">)</span><span class="Other">:</span> <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span> {.<span class="Identifier">closure</span><span class="Other">,</span> <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">gcsafe</span></span>.}<span class="Other">;</span>
           <span class="Identifier">address</span> <span class="Other">=</span> <span class="StringLit">&quot;&quot;</span><span class="Other">;</span> <span class="Identifier">assumedDescriptorsPerRequest</span> <span class="Other">=</span> <span class="DecNumber">-1</span><span class="Other">;</span> <span class="Identifier">domain</span> <span class="Other">=</span> <span class="Identifier">AF_INET</span><span class="Other">)</span><span class="Other">:</span> <a href="system.html#owned"><span class="Identifier">owned</span></a><span class="Other">(</span>
    <a href="asyncfutures.html#Future"><span class="Identifier">Future</span></a><span class="Other">[</span><a href="system.html#void"><span class="Identifier">void</span></a><span class="Other">]</span><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">stackTrace</span><span class="Other">:</span> <span class="DecNumber">false</span><span class="Other">,</span> <span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">Exception</span><span class="Other">,</span> <span class="Identifier">OSError</span><span class="Other">,</span> <span class="Identifier">ValueError</span><span class="Other">,</span>
    <span class="Identifier">SslError</span><span class="Other">,</span> <span class="Identifier">LibraryError</span><span class="Other">,</span> <span class="Identifier">KeyError</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">RootEffect</span><span class="Other">,</span> <span class="Identifier">WriteIOEffect</span><span class="Other">,</span>
    <span class="Identifier">ReadIOEffect</span><span class="Other">,</span> <span class="Identifier">TimeEffect</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    <p>Starts the process of listening for incoming HTTP connections on the specified address and port.</p>
<p>When a request is made by a client the specified callback will be called.</p>
<p>If <tt class="docutils literal"><span class="pre"><span class="Identifier">assumedDescriptorsPerRequest</span></span></tt> is 0 or greater the server cares about the process's maximum file descriptor limit. It then ensures that the process still has the resources for <tt class="docutils literal"><span class="pre"><span class="Identifier">assumedDescriptorsPerRequest</span></span></tt> file descriptors before accepting a connection.</p>
<p>You should prefer to call <tt class="docutils literal"><span class="pre"><span class="Identifier">acceptRequest</span></span></tt> instead with a custom server loop so that you're in control over the error handling and logging.</p>

    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L416" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L416" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>
<div id="shouldAcceptRequest-procs-all">
  <div id="shouldAcceptRequest,AsyncHttpServer,int">
  <dt><pre><span class="Keyword">proc</span> <a href="#shouldAcceptRequest%2CAsyncHttpServer%2Cint"><span class="Identifier">shouldAcceptRequest</span></a><span class="Other">(</span><span class="Identifier">server</span><span class="Other">:</span> <a href="asynchttpserver.html#AsyncHttpServer"><span class="Identifier">AsyncHttpServer</span></a><span class="Other">;</span>
                         <span class="Identifier">assumedDescriptorsPerRequest</span> <span class="Other">=</span> <span class="DecNumber">5</span><span class="Other">)</span><span class="Other">:</span> <a href="system.html#bool"><span class="Identifier">bool</span></a> {.<span class="Identifier">inline</span><span class="Other">,</span>
    <span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
  <dd>
    
    Returns true if the process's current number of opened file descriptors is still within the maximum limit and so it's reasonable to accept yet another request.
    <a href="https://github.com/nim-lang/Nim/tree/devel/lib/pure/asynchttpserver.nim#L397" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/nim-lang/Nim/edit/devel/lib/pure/asynchttpserver.nim#L397" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

</div>

  </dl>
</div>

  </div>
</div>

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        <small style="color: var(--hint);">Made with Nim. Generated: 2025-04-03 14:18:24 UTC</small>
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