It&#39;s for Google&#39;s [Chrome Frame][1] browser add-on.

ChromeFrame can be installed on various versions of IE (especially handy for older versions that don&#39;t play nicely with modern web features). It essentially runs the chrome browser *inside* of IE.

In the case of the meta tag, IE should run in standards mode (most current edition &quot;Edge&quot;) - and activate chrome frames if it exists. 

I usually do some conditional browser stuff for older versions of IE, allowing the user to install the add-on as an option. 

More here :
[chrome frame API][2]

(Keep in mind that Google Chrome Frame is no longer supported)

  [1]: http://www.google.com/chromeframe
  [2]: https://developers.google.com/chrome/chrome-frame/

Also, starting in IE11 &quot;edge&quot; mode, which used to be experimental, is now the &quot;preferred&quot; mode - see [Compatibility changes in IE11 Preview][1]

Additionally, &quot;document modes&quot; are generally being deprecated in IE11 all together, so you should probably try to stop depending on them.


  [1]: http://msdn.microsoft.com/en-us/library/ie/bg182625%28v=vs.85%29.aspx

I am using django-celery for my django project. Last day I have changed my computer&#39;s hostname (I am using Ubuntu 12.04, edited file &#39;/etc/hostname&#39;), and after next restart django-celery was failing with error 

    Consumer: Connection Error: [Errno 111] Connection refused. Trying again in 4 seconds...

After some research on this error I could find that, changing my host name caused this error from [here][1]. My rabbitmq startup log shows

file: /var/log/rabbitmq/startup_log

    Activating RabbitMQ plugins ...

    ********************************************************************************
    ********************************************************************************

    0 plugins activated:

    ERROR: epmd error for host &quot;jinesh&quot;: nxdomain (non-existing domain)

My startup_err file is empty. 

when I run 

    root@jinesh:/home/jinesh# rabbitmqctl list_users
    Listing users ...
    Error: unable to connect to node rabbit@jinesh: nodedown

    DIAGNOSTICS
    ===========

    nodes in question: [rabbit@jinesh]

    hosts, their running nodes and ports:
    - unable to connect to epmd on jinesh: nxdomain

    current node details:
    - node name: rabbitmqctl4956@jinesh
    - home dir: /var/lib/rabbitmq
    - cookie hash: RGhmB2JR1LbZ57j7xWWTxg==


I hope changing the nodename may fix this issue. But I couldn&#39;t found a way to do this. Anyone have idea about how solve this issue?

**update**

while changing hostname you have to change both `/etc/hostname` and `/etc/hosts` files.

I reinstalled rabbitmq and solved this issue, Will answer this question.


[1]: https://bugs.launchpad.net/ubuntu/+source/rabbitmq-server/+bug/653405

rabbitmq-server fails to start after hostname has changed for first time

I&#39;m looking for modules that should be added to a Node/Express app that address the general security concerns listed below:

* Injection Vulnerabilities (JavaScript, SQL, Mongo, HTML)
* Session fixation and hijacking
* Cross-Site Vulnerabilities (Scripting, Request Forgery)
* Mass Assignment
* *insert relevant concern here*

Thanks for your help!
    
----------
----------
Some resources I&#39;ve found:

&gt;Excellent talk (11/2012): http://lanyrd.com/2012/asfws/sxzbm/ (see slides)

&gt;ServerFault question (2011-2012): https://serverfault.com/questions/285123/is-node-js-mature-for-enterprise-security

&gt;Blog post on topic (9/2012): http://codefol.io/posts/29-Why-Rails-and-not-Sinatra-or-Node-js- 

&gt;Exploit tester: https://code.google.com/p/skipfish/

&gt;Passport Module: https://github.com/jaredhanson/passport

&gt;EveryAuth Module: https://github.com/bnoguchi/everyauth

Node.js Express Framework Security Issues

I just saw this meta tag in the wild and was wondering it does and why it&#39;s used?

    &lt;meta http-equiv=&quot;X-UA-Compatible&quot; content=&quot;IE=edge,chrome=1&quot; /&gt;

Reading the [documentation][1] on About.com, it says:

&gt;&quot;IE=edge&quot; tells Internet Explorer to use the highest mode available to that version of IE. Internet Explorer 8 can support up to IE8 modes, IE9 can support IE9 modes and so on.

But what about the `chrome=1` tag?


  [1]: http://webdesign.about.com/od/metataglibraries/p/x-ua-compatible-meta-tag.htm

What is X-UA-Compatible when it references IE=edge,chrome=1?

I just saw this meta tag in the wild and was wondering it does and why it's used?
<pre><code class="hljs language-ini">&#x3C;meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
</code></pre>
Reading the <a href="http://webdesign.about.com/od/metataglibraries/p/x-ua-compatible-meta-tag.htm" target="_blank" rel="noopener noreferrer">documentation</a> on About.com, it says:
>"IE=edge" tells Internet Explorer to use the highest mode available to that version of IE. Internet Explorer 8 can support up to IE8 modes, IE9 can support IE9 modes and so on.
But what about the <code>chrome=1</code> tag?

I have a html page where I am appending html at dynamically through a javascript like below

    &lt;script type=&quot;text/javascript&quot; src=&quot;/myapp/htmlCode&quot;&gt;&lt;/script&gt;

I want to call a js function e.g. loadedContent(); once the above script adds dynamic html.

Can someone help me how I can do that?

Call javascript function after script is loaded

I just upgraded an ASP.Net MVC application to MVC-4. The field editor for inputs based on DateTime values now include&#39;s the HTML-5 `type=&quot;date&quot;` attribute/value declaration.

Now, when viewing in Chrome, my date inputs show up with &quot;mm/dd/yyyy&quot; in the input field:


![date field with &#39;mm/dd/yyyy&#39; in box][1]


Even when I pass in a correctly-formatted date with the value attribute: 

    &lt;input value=&quot;2012/10/02&quot; type=&quot;date&quot;/&gt;

I&#39;m still getting &quot;mm/dd/yyyy&quot; in the input box, which is there until the user manually  changes the value.

The problem appears to be with Chrome, and is independent of my back-end framework. See this problem in action: [jsFiddle][2]

...big problem for editing records, of course. If the user pulls up a record that already has a valid date, it won&#39;t  pass  validation on submit, unless s/he clicked into the field and reset the value  manually.


No problems with the other browsers.

**Is this a Chrome bug? Or have I missed something about the way the HTML-5 date field is supposed to work?**

**UPDATE**    
See this revise fiddle: http://jsfiddle.net/HudMe/5/  It has both an HTML-4 and an HTML-5 date input, each with &quot;10/01/2012&quot; set as the value on page-load.

Click into either date field.
The Javascript should pup up an alert with the value of the field for that element. 

Because a valid date has been passed in with the value attribute, this should show &quot;10/01/2012&quot;, but in Chrome, for the HTML-5 date field, nothing shows. Reset this value by hand, then click again, and it will now show. 

The value from the HTML5 field shows and alerts as expected without adjustment after pageload in Safari, Firefox, IE and Opera.

**Note on accepted answer:**    
For other users of Asp.net mvc-4, you can adjust the display format with the `[DisplayFormat]` attribute on the DateTime field declaration in your view-model. (found at https://stackoverflow.com/a/12634470/613004 )

  [1]: http://i.stack.imgur.com/Ea0zc.jpg
  [2]: http://jsfiddle.net/HudMe/1/

HTML-5 date field shows as &quot;mm/dd/yyyy&quot; in Chrome, even when valid date is set

I am trying to format a number input by the user into currency using javascript. This works fine on `&lt;input type=&quot;text&quot; /&gt;`. However, on `&lt;input type=&quot;number&quot; /&gt;` I cannot seem to be able to set the value to anything that contains non-numeric values. The following fiddle shows my problem

http://jsfiddle.net/2wEe6/72/

Is there anyway for me to set the value to something like `$125.00`? 

I want to use `&lt;input type=&quot;number&quot; /&gt;` so mobile devices know to bring up a keyboard for number input.

Set value to currency in &lt;input type=&quot;number&quot; /&gt;

I am working with node.js and I streamed my Audio to my node.js server.
Now I noticed during the process of building the audio blob:

    var audioBlob = new Blob([dataview], { type: &#39;audio/wav&#39; });

That I get a ReferenceError at new Blob.
It seems that Blob is not supported.
How can I create a blob which I would like to save with node.js fs module.

Thanks guys!

Node.js can&#39;t create Blobs?

&gt; **Possible Duplicate:**  
&gt; [printing “&amp;lt;html&amp;gt;” using html](https://stackoverflow.com/questions/3505047/printing-html-using-html)  

&lt;!-- End of automatically inserted text --&gt;

How can I put the &lt; symbol literally into html text without invoking html stuffs.

Angle bracket (&lt;) without triggering html code

I would like my webpage&#39;s *viewport width* to equal *device-width* as long as *device-width* &gt; 450px, or 450px otherwise (my layout dynamically scales, but doesn&#39;t look good below 450px wide).

The following two meta tags work well on tablets, where the device-width &gt; 450px:

    &lt;!-- uses device width --&gt;
    &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width&quot; /&gt;

    &lt;!-- use of initial-scale means width param is treated as min-width --&gt;
    &lt;meta name=&quot;viewport&quot; content=&quot;width=450, initial-scale=1.0&quot; /&gt;
		
however, on phones (where e.g. device-width=320px) the former is too thin for the content; and the latter causes the browser to zoom in, so the user has to manually zoom out to see the content.

Alternatively, this meta tag works well on phones

    &lt;meta name=&quot;viewport&quot; content=&quot;width=450&quot; /&gt;
	
but doesn&#39;t take advantage of the extra width available on tablets.

Any help/ideas would be really appreciated (and if it makes a difference, I&#39;m using GWT).

Achieving min-width with viewport meta tag

I am doing some penetration testing on my localhost with OWASP ZAP, and it keeps reporting this message:

&gt; The Anti-MIME-Sniffing header X-Content-Type-Options was not set to
&gt; &#39;nosniff&#39;
&gt; 
&gt; This check is specific to Internet Explorer 8 and Google Chrome.
&gt; Ensure each page sets a Content-Type header and the
&gt; X-CONTENT-TYPE-OPTIONS if the Content-Type header is unknown

I have no idea what this means, and I couldn&#39;t find anything online. I have tried adding:

    &lt;meta content=&quot;text/html; charset=UTF-8; X-Content-Type-Options=nosniff&quot; http-equiv=&quot;Content-Type&quot; /&gt;

but the I still get the alert.

What is the correct way of setting the parameter?

What is &quot;X-Content-Type-Options=nosniff&quot;?

Please clarify what is the difference between `&lt;meta name=&quot;title&quot;&gt;` tag and `&lt;title&gt;&lt;/title&gt;` tag.

    &lt;title&gt;Page title&lt;/title&gt;
    &lt;meta name=&quot;title&quot; content=&quot;Page title&quot;&gt;

If both are used which is most prioritised?

I observed some sites both meta tag title and `&lt;title&gt;&lt;/title&gt;` tags both are same,which is expected, please confirm?

If we didn&#39;t use `&lt;meta&gt;` tag title would I have any problem regarding SEO?

    &lt;head&gt;
    &lt;title&gt;Stackoverflow&lt;/title&gt;
    &lt;meta name=&quot;description&quot; content=&quot;free source&quot;&gt;
    &lt;meta name=&quot;keywords&quot; content=&quot;HTML,CSS,XML,JavaScript&quot;&gt;    
    &lt;/head&gt;


Difference between &lt;meta name=&quot;title&quot;&gt; tag and &lt;title&gt;&lt;/title&gt; tag

Two common &lt;code&gt;meta&lt;/code&gt; element attributes are: 

    &lt;meta name=&quot;&quot; content=&quot;&quot;&gt;

and

    &lt;meta property=&quot;&quot; content=&quot;&quot;&gt;

what is the difference between meta name and meta property?



What&#39;s the difference between meta name and meta property?

I read Chrome Frame closed last month, I thus tried to understand what it&#39;d mean for the X-UA tag and after 3 hours of research I still didn&#39;t find the answer I&#39;m looking for, my question is the following :

Is it still valid nowdays to use IE=edge,chrome=1 or should I stop at IE-edge from now on ? Or what would be the best pratice to do regarding X-UA, should it be avoided ? 

Is it still valid to use IE=edge,chrome=1?

I&#39;ve taken several online courses lately and I still see some instructors add the following meta tag to the top of their documents by default:

    &lt;meta http-equiv=&quot;X-UA-Compatible&quot; content=&quot;IE=edge&quot;&gt;

The thinking appears to be that this is just as important and useful as `&lt;meta charset=&quot;UTF-8&quot;&gt;`.

But why?

According to [Microsoft&#39;s Modern.ie documentation][1] it&#39;s &quot;best practice&quot; which &quot;ensures Internet Explorer uses the latest engine&quot;. Ok, fair enough.

However, if you follow [the flow diagram on MSDN][2] it clearly shows that a document without `X-UA-Compatible` information is forwarded to the user&#39;s &quot;Compatibility View&quot; preferences, and [if *that&#39;s* not set then just follow the !DOCTYPE declaration][3].

In other words, unless the user has some Compatibility View settings in place, [IE will just follow your !DOCTYPE and use the latest standards mode of your browser for rendering anyway][4]... No need for a `X-UA-Compatible IE=Edge` statement at all.

As MSDN says: &quot;[Use the HTML5 document type declaration to enable edge mode][5]&quot;.

So in what circumstances is `X-UA-Compatible IE=Edge` needed?


  [1]: https://www.modern.ie/en-us/performance/how-to-use-x-ua-compatible
  [2]: http://msdn.microsoft.com/en-us/library/ff955275%28v=vs.85%29.aspx
  [3]: http://msdn.microsoft.com/en-us/library/ff955410(v=vs.85).aspx
  [4]: http://msdn.microsoft.com/en-us/library/ff405803%28v=vs.85%29.aspx
  [5]: http://msdn.microsoft.com/en-us/library/ie/bg182625.aspx#docmode

Content Type	Original Author	Original Content on Stackoverflow
Question	sergserg	View Question on Stackoverflow
Solution 1 - Html	Bosworth99	View Answer on Stackoverflow
Solution 2 - Html	Doug Rohrer	View Answer on Stackoverflow

What is X-UA-Compatible when it references IE=edge,chrome=1?

Html Problem Overview

Html Solutions

Solution 1 - Html

Solution 2 - Html

Node.js Express Framework Security Issues

rabbitmq-server fails to start after hostname has changed for first time

Attributions