I have created an issue [1] and will take a look this evening. I suspect it is my problem rather than BaseX. I have never been happy with that parsing code :-) <br><br>I see there are now 3 Node BaseX clients [2] I think Hans simple-basex has a lot of good ideas regarding the parsing.<br>
<br>/Andy<br><br>[1] <a href="https://github.com/apb2006/basex-node/issues/10">https://github.com/apb2006/basex-node/issues/10</a> <br>[2] <a href="https://npmjs.org/search?q=basex">https://npmjs.org/search?q=basex</a><br>
<br><div class="gmail_quote">On Tue, Jul 23, 2013 at 3:13 PM, Gerald de Jong <span dir="ltr">&lt;<a href="mailto:gerald@delving.eu" target="_blank">gerald@delving.eu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">The state machine starts in &quot;type&quot; state.<div><br></div><div><div><span style="white-space:pre-wrap">			</span>case &quot;type&quot;:</div><div><span style="white-space:pre-wrap">				</span>var r = self.popByte();</div>

<div><span style="white-space:pre-wrap">				</span>if (r) {</div><div><span style="white-space:pre-wrap">					</span>self.state = (r.data == &quot;\0&quot;) ? &quot;status&quot; : &quot;item&quot;;</div><div><span style="white-space:pre-wrap">					</span>progress = true;</div>

<div><span style="white-space:pre-wrap">				</span>}</div><div><span style="white-space:pre-wrap">				</span>break</div></div><div><br></div><div>But the first time it gets in here popByte returns an empty object for r.  I would have expected it to get that they &quot;type&quot; is \000b.  Maybe there&#39;s something wrong at the deeper interpretation level.  This does look like a proper response from BaseX:</div>
<div class="im">
<div><br></div><div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">S1&lt;&lt;</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">&#39;\u000b&lt;person&gt;Gumby\nman&lt;/person&gt;\u0000\u000b&lt;person&gt;Pokey\nhorse&lt;/person&gt;\u0000\u0000\u0000&#39;</div>

</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><br></div></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">Does it not?</div></div><div class="HOEnZb"><div class="h5">
<div class="gmail_extra"><br><br><div class="gmail_quote">
On Tue, Jul 23, 2013 at 4:09 PM, Gerald de Jong <span dir="ltr">&lt;<a href="mailto:gerald@delving.eu" target="_blank">gerald@delving.eu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<div dir="ltr"><div>Hi Andy!  Thanks for getting back to me so quickly.  I&#39;m indeed using:</div><div><br></div><div>package.json:    &quot;basex&quot;: &quot;~0.6.1&quot;<br></div><div><br></div>I thought as well that it might be an old reply, but all I do is create a database, insert a document, and then query for something that is not there.<div>


<br></div><div>I am using BaseX 7.6 if that makes any difference.<br><div><br></div><div>Maybe you can see it.  Here&#39;s the debug of what goes back and forth during the whole session:</div><div><br></div><div><div>S1&lt;&lt;</div>


<div>&#39;1374588092554420000\u0000&#39;</div><div>S1&gt;&gt;</div><div>&#39;admin\u0000&#39;</div><div>S1&gt;&gt;</div><div>&#39;713de454606e785a0666bd57e6554891\u0000&#39;</div><div>S1&lt;&lt;</div><div>&#39;\u0000&#39;</div>


<div>S1: authorized</div><div>S1&gt;&gt;</div><div>&#39;create db gumby\u0000&#39;</div><div>S1&lt;&lt;</div><div>&#39;\u0000Database \&#39;gumby\&#39; created in 5.01 ms.\n\u0000\u0000&#39;</div><div>response:  { result: &#39;&#39;,</div>


<div>  info: &#39;Database \&#39;gumby\&#39; created in 5.01 ms.\n&#39;,</div><div>  ok: true }</div><div>.S1&gt;&gt;</div><div>&#39;\t/people.xml\u0000&lt;people&gt;&lt;person&gt;Gumby\nman&lt;/person&gt;&lt;something&gt;else&lt;/something&gt;&lt;person&gt;Pokey\nhorse&lt;/person&gt;&lt;/people&gt;\u0000&#39;</div>


<div>S1&lt;&lt;</div><div>&#39;Path &quot;people.xml&quot; added in 1.88 ms.\n\u0000\u0000&#39;</div><div>response:  { ok: true, result: &#39;Path &quot;people.xml&quot; added in 1.88 ms.\n&#39; }</div><div>.S1&gt;&gt;</div>


<div>&#39;\u0000//somethingNotThere\u0000&#39;</div><div>S1&lt;&lt;</div><div>&#39;0\u0000\u0000&#39;</div><div>response:  { ok: true, result: &#39;0&#39; }</div><div>S1&gt;&gt;</div><div>&#39;\u00040\u0000&#39;</div><div>


S1&lt;&lt;</div><div>&#39;\u0000\u0000&#39;</div></div><div><br></div><div>And then it hangs, since the callback isn&#39;t called.  </div><div><br></div><div>If, instead, I do a query that does give results back I get the first value prefixed with \000b, which I believe is intended to indicate that the result is an &quot;element&quot;.</div>


<div><br></div><div><div>S1&lt;&lt;</div><div>&#39;\u000b&lt;person&gt;Gumby\nman&lt;/person&gt;\u0000\u000b&lt;person&gt;Pokey\nhorse&lt;/person&gt;\u0000\u0000\u0000&#39;</div><div>response:  { ok: true,</div><div>  result:</div>


<div>   [ &#39;\u000b&lt;person&gt;Gumby\nman&lt;/person&gt;&#39;,</div><div>     &#39;&lt;person&gt;Pokey\nhorse&lt;/person&gt;&#39; ] }</div><div>{&quot;ok&quot;:true,&quot;result&quot;:[&quot;\u000b&lt;person&gt;Gumby\nman&lt;/person&gt;&quot;,&quot;&lt;person&gt;Pokey\nhorse&lt;/person&gt;&quot;]}</div>


</div><div><br></div></div><div>See what I mean?</div><span><font color="#888888"><div><br></div><div>-Gerald</div></font></span></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Tue, Jul 23, 2013 at 3:54 PM, Andy Bunce <span dir="ltr">&lt;<a href="mailto:bunce.andy@gmail.com" target="_blank">bunce.andy@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Gerald,<br><br>Could that &#39;\u0000\u0000&#39; be part of an asynchronous  response to some previous command? <br>


<br>Otherwise it looks fine:<br><span style="font-family:courier new,monospace">-&gt; &#39;\u0000 () \u0000&#39;   // create query returning empty sequence<br>
&lt;- &#39;1\u0000 \u0000&#39;     //The 1 is the query handle.<br>-&gt; &#39;\u0004 1 \u0000&#39;    //Execute the query with handle 1<br>&lt;- &#39;\u0000 \u0000&#39;      // no result no error</span><br><br>Are you using <a href="https://npmjs.org/package/basex" target="_blank">https://npmjs.org/package/basex</a>? If you can raise any problems or questions on github and I will take a look.<br>



<br>/Andy <br><br><div class="gmail_quote"><div><div>On Tue, Jul 23, 2013 at 12:43 PM, Gerald de Jong <span dir="ltr">&lt;<a href="mailto:gerald@delving.eu" target="_blank">gerald@delving.eu</a>&gt;</span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>
<div dir="ltr"><div>So the driver sends a query for something that should give no results:</div><div><br></div>&#39;\u0000/somethingNotThere\u0000&#39;<br><div><br></div><div>It then receives, to my surprise:</div><div><br>




</div><div>&#39;\u0000\u0000&#39;<br></div><div><br></div><div>followed by:</div><div><br></div><div>&#39;1\u0000\u0000&#39;<br></div><div><br></div><div>then sends:</div><div><br></div><div>&#39;\u00041\u0000&#39;<br></div>




<div><br></div><div>and receives again:</div><div><br></div><div>&#39;\u0000\u0000&#39;<br></div><div><br></div><div>Are these proper responses.. is the driver misunderstanding them?</div><div><div><br></div><div class="gmail_extra">




<br><br><div class="gmail_quote">On Tue, Jul 23, 2013 at 1:41 PM, Gerald de Jong <span dir="ltr">&lt;<a href="mailto:gerald@delving.eu" target="_blank">gerald@delving.eu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">




<div dir="ltr">Woops, somehow sent before I intended.  Just a sec.</div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jul 23, 2013 at 1:40 PM, Gerald de Jong <span dir="ltr">&lt;<a href="mailto:gerald@delving.eu" target="_blank">gerald@delving.eu</a>&gt;</span> wrote:<br>





<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I&#39;m trying to quickly prototype a REST server which uses BaseX for persistence using NodeJS.<div><br>





</div><div>I&#39;m able to create a session, add a document, query that document, and then close the session.  Fine.</div>
<div><br></div><div>But when I create a query that should return no results, it seems the NodeJS module for BaseX I&#39;m using seems to completely misunderstand the result and never execute the callback.</div><div><br></div>






<div>I looked at the protocol spec <a href="http://docs.basex.org/wiki/Server_Protocol" target="_blank">http://docs.basex.org/wiki/Server_Protocol</a> but it doesn&#39;t seem to give back what is specified here.  I need a sanity check.</div>






<div><br></div><div>The driver sends this:<span><font color="#888888"><br clear="all"><div><br></div></font></span></div></div></blockquote></div></div></div></div></blockquote></div>-- <br>Delving BV, Vasteland 8, Rotterdam<br>




<a href="http://www.delving.eu" target="_blank">http://www.delving.eu</a><br><a href="http://twitter.com/fluxe" target="_blank">http://twitter.com/fluxe</a><br>skype: beautifulcode<br><a href="tel:%2B31629339805" value="+31629339805" target="_blank">+31629339805</a><br>




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