This is very straightforward : the`readyState` property of the websocket contains the connection of the websocket at all times as specified in the [WebSocket API][1]

It will be one of the following values : `CONNECTING` `OPEN` `CLOSING` or `CLOSED`

A way to work around the error would be something like this :

&lt;!-- language:lang-js --&gt;

    if (yourWsObject.readyState === WebSocket.CLOSED) {
       // Do your stuff...
    }

  [1]: https://developer.mozilla.org/en-US/docs/Web/API/WebSocket#Ready_state_constants

So I have tabs that I want to hide when the Navigation Drawer **starts** opening. The code I have hides them when it finished opening, but it&#39;s not what I want.

    mDrawerToggle = new ActionBarDrawerToggle(
            this,                 
            mDrawerLayout,        
            R.drawable.ic_drawer,  
            R.string.drawer_open,  
            R.string.drawer_close  
    ) {
        @Override
        public void onDrawerClosed(View view) {
            invalidateOptionsMenu(); 
            setActionBarMode(ActionBar.NAVIGATION_MODE_TABS);
        }

        @Override
        public void onDrawerOpened(View drawerView) {
            invalidateOptionsMenu(); 
            setActionBarMode(ActionBar.NAVIGATION_MODE_STANDARD);
        }

    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);


Here&#39;s what I tried:

 - Setting an `onClickListener` to `mDrawerLayout`. `onClick` never gets called
 - Setting an `onTouchListener` to `mDrawerLayout`. `onTouch` never gets called
 - Researched `ActionBarDrawerToggle` and `DrawerLayout` classes. Could not find anything like `onDrawerStartedOpening`.

How to detect that the DrawerLayout started opening?

In laravel, after using attach() or detach() to add or remove something from a relation, the collection has not changed. So if I have a model whose realation contains `[1, 2]`, after this:

    $model-&gt;relation()-&gt;detach(1);
    $model-&gt;relation()-&gt;attach(3);

it will still contain `[1, 2]`! How do I refresh it?

How do I reload a relation collection in laravel?

Sometimes when I restart the server or there is a network failure the websocket gets closed and I would like to be able to get the current connection status at all time.

I am basically getting the following error and I want to be able to predict it :

&lt;!-- language:lang-js --&gt;

    WebSocket is already in CLOSING or CLOSED state. 
        (anonymous function) 
        InjectedScript._evaluateOn 
        InjectedScript._evaluateAndWrap 
        InjectedScript.evaluate



How to get the current status of a javascript websocket connection

Sometimes when I restart the server or there is a network failure the websocket gets closed and I would like to be able to get the current connection status at all time.
I am basically getting the following error and I want to be able to predict it :

<pre><code class="hljs language-swift">WebSocket is already in CLOSING or CLOSED state. 
 (anonymous function) 
 InjectedScript._evaluateOn 
 InjectedScript._evaluateAndWrap 
 InjectedScript.evaluate
</code></pre>

Recently, I started using `reactjs` along with a `backbonejs` router to build an application.

I usually use use `requirejs` for dependency and code management. But, problem arises when I try to include files that contain `jsx` syntax.

This is what I have so far as my `router.js`:

    define([&quot;backbone&quot;, &quot;react&quot;], function(Backbone, React) {
    
      var IndexComponent = React.createClass({
        render : function() {
          return (
            &lt;div&gt;
            Some Stuff goes here
            &lt;/div&gt;
            );
        }
      });
    
    
    
      return Backbone.Router.extend({
        routes : {
          &quot;&quot;: &quot;index&quot;
        },
        index : function() {
          React.renderComponent(&lt;IndexComponent /&gt;, document.getElementById(&#39;index&#39;));
        }
      });
    });

How do I put IndexComponent in its own file and call it in this file ? I have tried the usual method (the same that I have used with backbone and react) but got an error due to `jsx` syntax.

Using reactjs with requirejs

I am currently reading [Async Javascript][1] by Trevor Burnham.  This has been a great book so far.

He talks about this snippet and console.log being &#39;async&#39; in the Safari and Chrome console. Unfortunately I can&#39;t replicate this. Here is the code:

    var obj = {}; 
    console.log(obj); 
    obj.foo = &#39;bar&#39;;
    // my outcome: Object{}; &#39;bar&#39;;
    // The book outcome: {foo:bar};
If this was async, I would anticipate the outcome to be the books outcome. console.log() is put in the event queue until all code is executed, then it is ran and it would have the bar property.

It appears though it is running synchronously.

Am I running this code wrong? Is console.log actually async?



  [1]: http://pragprog.com/book/tbajs/async-javascript

console.log() async or sync?

I am having an issue with Javascript. I&#39;m getting this error message:

&gt; Uncaught NotFoundError: Failed to execute &#39;insertBefore&#39; on &#39;Node&#39;: The node before which the new node is to be inserted is not a child of this node.

Javascript:

    var vidCounter = 0;
	    vidCounter++;
	var originalDiv;
	var newVideo = document.createElement(&quot;video&quot;);
        newVideo.setAttribute(&quot;name&quot;, vidCounter);
		newVideo.setAttribute(&quot;autoplay&quot;, &quot;true&quot;);
		originalDiv = document.getElementById(&quot;othersarea&quot;);
	    document.body.insertBefore(newVideo, originalDiv); 

It is trying to add a `&lt;video&gt;` tag below a div called `othersarea`.

    &lt;div id=&quot;remoteVideos&quot;&gt;
       	&lt;div class=&quot;title&quot;&gt;
		    &lt;h2&gt;Others&lt;/h2&gt;
        &lt;/div&gt;
        &lt;div id=&quot;othersarea&quot;&gt;
		&lt;/div&gt;
    &lt;/div&gt;


How do I fix this? 

I also want to run `attachMediaStream([VIDEO TAG HERE HOW?], event.stream);` on my new video tag.


Uncaught NotFoundError: Failed to execute &#39;insertBefore&#39; on &#39;Node&#39;: The node before which the new node is to be inserted is not a child of this node

Is is possible to embed SVG markup into a ReactJS component? 

    render: function() {
      return (
        &lt;span&gt;
          &lt;svg version=&quot;1.1&quot; id=&quot;Layer_1&quot; xmlns=&quot;http://www.w3.org/2000/svg&quot; xmln ...
        &lt;/span&gt;
      );
    }

Results in the error: 

&gt; Namespace attributes are not supported. ReactJSX is not XML.

What is the lightest way of doing this. Using something like [React ART][1] is way overkill for what I&#39;m trying to do.


  [1]: https://github.com/facebook/react-art

Embedding SVG into ReactJS

How do I hide the x-axis label/text that is displayed in chart.js ?

Setting `scaleShowLabels:false` only removes the y-axis labels.

    &lt;script&gt;
		var options = {
			scaleFontColor: &quot;#fa0&quot;,
			datasetStrokeWidth: 1,
			scaleShowLabels : false,
			animation : false,
			bezierCurve : true,
			scaleStartValue: 0,
		};
		var lineChartData = {
			labels : [&quot;1&quot;,&quot;2&quot;,&quot;3&quot;,&quot;4&quot;,&quot;5&quot;,&quot;6&quot;,&quot;7&quot;],
			datasets : [
				{
					fillColor : &quot;rgba(151,187,205,0.5)&quot;,
					strokeColor : &quot;rgba(151,187,205,1)&quot;,
					pointColor : &quot;rgba(151,187,205,1)&quot;,
					pointStrokeColor : &quot;#fff&quot;,
					data : [1,3,0,0,6,2,10]
				}
			]
			
		}

	var myLine = new Chart(document.getElementById(&quot;canvas&quot;).getContext(&quot;2d&quot;)).Line(lineChartData,options);
	
	&lt;/script&gt;

Remove x-axis label/text in chart.js

I&#39;d like to use WebSockets for inter-process communication for my application (Daemon&lt;-&gt;WebGUI and Daemon&lt;-&gt;FatClient, etc.). During testing, I tried connecting to my locally running web socket server (ws://localhost:1234) via the JavaScript WebSocket client on websocket.org (http://www.websocket.org/echo.html).

My question now is:   
**Why is this possible?** Is there no cross-origin policy implemented in the browsers (here: FF29 on Linux)? 

I am asking because if websocket.org was evil, it could try to communicate with my local WS server and redirect every message it receives from localhost to any other server:

&lt;pre&gt;
Local WebSocket Server            Browser            Evil Web Server
at ws://localhost:1234                               at http://evil.tld
        |                            |                       |
        |                            |------[GET /]---------&amp;gt;|
        |                            |&amp;lt;-----[HTML+EvilJS]----|
        |&amp;lt;------[connect ws://..]----|                       |
        |&amp;lt;----[some communication]--&amp;gt;|                       |
        |                            |----[evil forward]----&amp;gt;|
        |                            |                       |
&lt;/pre&gt;

I have not tested the entire use case, but the connect to ws://localhost from the JS delivered by websocket.org definitely works.

Why is there no same-origin policy for WebSockets? Why can I connect to ws://localhost?

I have the follow situation:

     var options = {
    	    protocols_whitelist : [ &quot;websocket&quot;, &quot;xhr-streaming&quot;, &quot;xdr-streaming&quot;, &quot;xhr-polling&quot;, &quot;xdr-polling&quot;, &quot;iframe-htmlfile&quot;, &quot;iframe-eventsource&quot;, &quot;iframe-xhr-polling&quot; ],
    	    debug : false
    	};
    
    	var socket = new SockJS(&quot;/mmyurl/&quot;,undefined,options);
    	var stompClient = Stomp.over(socket);
    	stompClient.connect({
    	    company : &quot;XXXXX&quot;
    	}, function(frame) {
    	    stompClient.subscribe(&#39;/topic/mytopic&#39;, function(message){ 
    	    	var myitem = JSON.parse(message.body);
    	    	
    	    });

all works fine, the problem is that on the javascript console is full of debug messages like this:

    &lt;&lt;&lt; MESSAGE
    content-type:application/json;charset=UTF-8
    subscription:sub-1
    message-id:o6g660dt-113
    destination:/topic/mytopic
    content-length:411

And I want to disable the messages.

I tried to change some option and also tried to register simply:

    var socket = new SockJS(&quot;/mmyurl/&quot;);

but it doesn&#39;t work.

Is there a way to disable the debug messages?

Any help is appreciated


How to disable debug messages on sockjs- STOMP

Let&#39;s say I have a node server started with port `nn`, and there is not any WebSocket service on it.

And the problem is that my client trys to connect a WebSocket service to this server.

Obviously, it should fail to connect to the server.

But I couldn&#39;t catch this error, my client code is the following:

    try {
        this.ws = new WebSocket(&#39;ws://xxx:nn&#39;);
    } catch ( e ) {
        fallback();
        console.warn(e);
    }

My expectation is that the `fallback` method gets called while connecting fails, but actually the error is not caught by the above `try...catch`

Does anyone know how to catch the error in my usecase?

How to catch `WebSocket connection to &#39;ws://xxx:nn&#39; failed: Connection closed before receiving a handshake response` error?

Can someone please provide me very simple example of websocket client using `javax.websocket`?

I want to connect to websocket (ws://socket.example.com:1234), send message (add channel) and listen to messages. All messages (sent &amp; listened) are in JSON format.

And btw is this library the best for simple websocket communication?

javax.websocket client simple example

I&#39;m about to develop a website that has near real time chat. I know that it can be implemented using xmpp or websocket protocols. I know also that the xmpp protocol has been developed in 1999 , and I guess it should be mature nowadays .On the other hand , the websocket protocol has been developed in 2011. 

 1. What was the need for websocket if xmpp was good in handling real time conversations?
 2.  What are the major differences between the 2 protocols? 
 3. And when should I choose one of them over the other?


Xmpp Vs Websocket

I don&#39;t understand the responses that others have provided to similar questions except for the most obvious ones, such as the one below:

    mysql&gt; SET GLOBAL local_infile=1;
    Query OK, 0 rows affected (0.00 sec)

    mysql&gt; SHOW GLOBAL VARIABLES LIKE &#39;local_infile&#39;;

    +---------------+-------+
    | Variable_name | Value |
    +---------------+-------+
    | local_infile  | ON    |
    +---------------+-------+
    1 row in set (0.01 sec)

By this I mean the exact code was provided. I&#39;d greatly appreciate if someone could walk me through, step by step, what I need to do to enable local data on the &quot;client&quot; side and &quot;server&quot; side. It seems like I&#39;ve enabled local data on the client side, but I don&#39;t know what instructions I need to give my computer to enable the &quot;server side&quot;. I&#39;m not tech savvy at all, and I just want to be able to get to the point where the data has been uploaded into MySQL workbench.

    ERROR 3948 (42000): Loading local data is disabled; this must be enabled on both the client and server sides

&lt;!-- --&gt;

    CREATE TABLE toys (
    uniq_id VARCHAR(1000),
    product_name VARCHAR(1000),
    manufacturer VARCHAR(1000),
    price VARCHAR(1000),
    number_available_in_stock VARCHAR (1000),
    number_of_reviews INT,
    number_of_answered_questions INT,
    average_review_rating VARCHAR(1000),
    amazon_category_and_sub_category VARCHAR(1000),
    customers_who_bought_this_item_also_bought VARCHAR(1000),
    description VARCHAR(1000),
    product_information VARCHAR(1000),
    product_description VARCHAR(1000),
    items_customers_buy_after_viewing_this_item VARCHAR(1000),
    customer_questions_and_answers VARCHAR(1000),
    customer_reviews VARCHAR(1000),
    sellers VARCHAR(1000)
    );

    LOAD DATA LOCAL INFILE ‘/Users/BruddaDave/Desktop/amazonsample.csv’ INTO TABLE toys
    FIELDS TERMINATED BY ‘,’
    LINES TERMINATED BY ‘\n’
    IGNORE 1 LINES
    (uniq_id, product_name, manufacturer, price, number_available_in_stock, number_of_reviews, number_of_answered_questions, average_review_rating, amazon_category_and_sub_category, customers_who_bought_this_item_also_bought, description, product_information, product_description, items_customers_buy_after_viewing_this_item, customer_questions_and_answers, customer_reviews, sellers)
    ;

I just want to be able to import a .csv file into MySQL using the command line shell.

Content Type	Original Author	Original Content on Stackoverflow
Question	Johnride	View Question on Stackoverflow
Solution 1 - Javascript	Johnride	View Answer on Stackoverflow

How to get the current status of a javascript websocket connection

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

How do I reload a relation collection in laravel?

How to detect that the DrawerLayout started opening?

Attributions