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PONodeJS receiving data from PHP server
 

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    <p>I'm currently working on a simple NodeJS client that connects to a PHP server using the net classes. In addition, the NodeJS client is working as a Socket.IO server that sends data received from the PHP server to the browsers connected with Socket.IO.</p> <p>So far, everything is working fine. Yet if I connect with another client to Socket.IO, the PHP server has to send a notification to every connected client. Thus, it sends a JSON-encoded array to the NodeJS client which processes the JSON data (decoding and modifying it a bit).</p> <p>Now the problem is that sometimes two separate messages sent by the PHP server are concatenated in NodeJS' onData event handling function:</p> <pre><code>client.on("data", function(data) { var msgData = JSON.parse(data.toString("utf8")); [...] } </code></pre> <p>The variable <em>data</em> now <strong>sometimes</strong> (not every time!) contains two JSON-strings, such as:</p> <pre><code> { "todo":"message", [...] } { "todo":"message", [...] } </code></pre> <p>This of course results in an exception thrown by the <em>JSON.parse</em> function. I expected two calls of the onData-function with the variable <em>data</em> being:</p> <pre><code>{ "todo":"message", [...] } </code></pre> <p>On the PHP server side I have to iterate over an array containing all Socket.IO-connections that are currently served:</p> <pre><code>foreach($sockets as $id =&gt; $client) { $nodeJS-&gt;sendData($client, array("todo" =&gt; "message", [...]); } </code></pre> <p>The <em>$nodeJS->sendData</em>-function json-encodes the array and sends it to the NodeJS client:</p> <pre><code>socket_write($nodeClient, json_encode($dataToSend)); </code></pre> <p>The <em>$nodeJS->sendData</em> function is definitively called two times, as socket_write is.</p> <p>I now have no idea whether PHP or NodeJS concatenates those two strings. What I want, is that NodeJS calls the onData-handler once for each time the <em>$nodeJS->sendData</em> function is called (e.g. sendData is called twice → the onData-event is fired twice). I could of course add some flag at the end of each json-encoded string and later split them into an array in the onData function. However, I don't like that solution much.</p> <p>Is there an easier way to accomplish this?</p>
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