Opera Developer News

lovely stuff

So shiny http://files.myopera.com/Tamil/Smilies/Drool.gif -

Opera 12 Announced and now Available to Download! http://online-ako.blogspot.com/2012/06/opera-12-announced-and-now-available-to.html

Nice! Core changes are always the brightest part of new releases

Now for the async script loading...

What about WebSockets? Has support been enabled by default? Every other browser vendor now has WebSocket support enabled by default in their latest releases.

Love it, love it & absolutely well done. As it blends with a new generation of apps this should come over as a Chrome beater.
Superb.
Will start splashing over Facebook and Twitter to try to get many friends and acquaintances to try and use

Originally posted by buskanaka:

What about WebSockets? Has support been enabled by default? Every other browser vendor now has WebSocket support enabled by default in their latest releases.

Updated websockets will be in Opera soon: http://www.opera.com/docs/specs/presto2.11/#m211-337

Nice makeover. Too sad that you still did not fix the bug (DSK-351034) I reported almost seven months ago.

First thing i do when i see "Opera 12 Launched". I regularly use Google Chrome, but memory problems lure to me Opera. I went on Opera.com, and downloaded it in no time.

It would be really good if you can improvement on your update and improvement speed, as Opera 12 remained Beta for almost a year. It would be nice to have Opera 12 be like Chrome and Firefox, making updates and new versions every 1-2 months.

Also the Extension list. I'll be the best browser if it had more extensions.

Overall, Opera 12 is more like Opera 13. Ultimate revolutionary, but improvement speed and a better extension list would help a lot.

Originally posted by operaproductions:

Also the Extension list. I'll be the best browser if it had more extensions.

What extensions do you miss?

Great news, Opera 12 is a monster collection of new features!

One thing though, with IE10 dropping prefixes for css animations, transforms, transitions and gradients - are there any similar plans from Opera ?

Originally posted by buskanaka:

What about WebSockets? Has support been enabled by default? Every other browser vendor now has WebSocket support enabled by default in their latest releases.

Wait for autumn. By the time IE10 will be about to get released with WebSockets support, i expect Opera to enable them by default in some minor version.

Originally posted by operaproductions:

It would be really good if you can improvement on your update and improvement speed, as Opera 12 remained Beta for almost a year.

I think, 11.60 was a nice move with lots of features from 12.0 delivered half-a-year ahead. So, if we will be getting updates on frequent basis, i don't mind staying on version 12 for some time.

minor nuisance: opera:config help is broken ("No information could be found for this item.")

I just auto-upgraded to version 12 (on windows), and decided to check out new webgl the demos.

I am greatly disappointed, what is this crap?

The Odin demo doesn't work at all (plays sound, but just gives script errors), the flight trip demo doesn't show anything beyond a list of airlines, and the realtime 3d histogram doesn't show any histograms, just a blank grey box and a meaningless media control

Some of the other demos, like the emberwind demo and the pointless "dog running over shoes on a bike" demo work just fine, so I know I have webgl set up and working

What is the point in showcasing something that doesn't actually work?

Originally posted by c69:

minor nuisance: opera:config help is broken ("No information could be found for this item.")

Same for me..

Originally posted by adavis159:

I just auto-upgraded to version 12 (on windows), and decided to check out new webgl the demos.

I am greatly disappointed, what is this crap?

The Odin demo doesn't work at all (plays sound, but just gives script errors), the flight trip demo doesn't show anything beyond a list of airlines, and the realtime 3d histogram doesn't show any histograms, just a blank grey box and a meaningless media control

Some of the other demos, like the emberwind demo and the pointless "dog running over shoes on a bike" demo work just fine, so I know I have webgl set up and working

What is the point in showcasing something that doesn't actually work?

I guess Opera 12's webGL and hardware acceleration is still in experimenting. Like- Opera 12 is beta and alpha for like a year and they still can't perfect their webGL !?

Opera still needs to take some drastic measures to core changes. Opera 12 has good core changes, but it still isn't perfect.

When will the goodness of Opera 12 like getusermedia and other html5 features come to opera mini/mobile?

Why does the "allow file xmlhttprequest" does not work anymore in Opera 12???
I need to load a local file, until 11.64 version I was able but now it's impossible: how can I do???

Originally posted by srappose:

Why does the "allow file xmlhttprequest" does not work anymore in Opera 12???I need to load a local file, until 11.64 version I was able but now it's impossible: how can I do???

Did you make sure the file you're trying to load is in the same directory as the web page or a sub-directory of that directory?

I don't think you can have a page on your desktop and use XMLHttpRequest() to load a file at or even as that'd be a higher directory level. Think Opera was changed be restrictive like that a while ago. I think Firefox does it too.

Originally posted by burnout426:

Originally posted by srappose:

Why does the "allow file xmlhttprequest" does not work anymore in Opera 12???I need to load a local file, until 11.64 version I was able but now it's impossible: how can I do???

Did you make sure the file you're trying to load is in the same directory as the web page or a sub-directory of that directory?

I don't think you can have a page on your desktop and use XMLHttpRequest() to load a file at file:///c:/file.xml or even file:///c:/Users/user/file.xml as that'd be a higher directory level. Think Opera was changed be restrictive like that a while ago. I think Firefox does it too.

I didn't changed my code. Moreover, I uninstalled Opera 12 and installed an 11.64 version and all work perfectly!So it is not a directory issue but rather a further restriction to local file management and I don't yet understand why only Chrome and Opera go on to this security policy.

Originally posted by srappose:

I didn't changed my code.

O.K. But does your code meet those path restrictions I mentioned?

The web page and files to be loaded have always been in the same directory

Originally posted by srappose:

The web page and files to be loaded have always been in the same directory

O.K.

This works fine on my on my Win7 x64 desktop in Opera 12 x64 with Allow File XMLHttpRequest checked.

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title></title>
        <style>
            body {
                white-space: pre
            }
        </style>
        <script>
            window.addEventListener("DOMContentLoaded", function() {
                var req = new XMLHttpRequest();
                req.addEventListener("load", function(e) {
                    var doc = e.target.responseXML;
                    var srlz = new XMLSerializer();
                    document.body.textContent = srlz.serializeToString(doc);
                }, false);
                req.open("GET", "file.xml", true);
                req.send();
            }, false);
        </script>
    </head>
    <body>
    
    </body>
</html>

file.xml

<?xml version="1.0" encoding="utf-8"?>
<root>
    <test>d</test>
</root>

Thank you for your example but I need to load an xsl file which would parse an xml file, both in synchronous way as the following code snippet:

...

// load the xslt file
var myXMLHTTPRequest = new XMLHttpRequest();

myXMLHTTPRequest.open("GET", xslfile, false);

myXMLHTTPRequest.send(null);

xslStylesheet = myXMLHTTPRequest.responseXML;
xsltProcessor.importStylesheet(xslStylesheet);

try{
// load the xml file
myXMLHTTPRequest = new XMLHttpRequest();
myXMLHTTPRequest.open("GET", xmlfile, false);
myXMLHTTPRequest.send(null);
xmlDoc = myXMLHTTPRequest.responseXML;
}
catch(err){
xmlDoc = document.implementation.createDocument("", "", null);
}

...
The problem is in "xslStylesheet = myXMLHTTPRequest.responseXML;" where I get an "Unhandled Error: WRONG_ARGUMENTS_ERR" and a responseXML null.
This worked well in previous Opera versions

To follow specs (or fix some issue), I think Opera fixed it so responseXML is null if the file isn't served with an xml mime type.

xslt files in "Ctrl + F12 -> advanced -> downloads" are served with an xml type. But, if your file just has an "xsl" extension, you might have to add xsl to the application/xslt+xml type extension list.

Originally posted by burnout426:

To follow specs (or fix some issue), I think Opera fixed it so responseXML is null if the file isn't served with an xml mime type.

xslt files in "Ctrl + F12 -> advanced -> downloads" are served with an xml type. But, if your file just has an "xsl" extension, you might have to add xsl to the application/xslt+xml type extension list.

You are a genius!!!It works but I have another question: is it possible to add the mime type association dinamically, for example via Javascript?

is it possible to add the mime type association dinamically, for example via Javascript?

The mime type should already be in Opera by default. Not sure how to get Opera to add the xsl extension to the mime type list with JS or some trick.

If you request an xsl file served as application/xslt+xml on some server, Opera might (didn't check, long shot) add the xsl type to the list.

It's not possible for you to just rename the xsl file to xslt? If not, perhaps Opera can just add xsl to the application/xslt+xml type in the future so you don't have to worry about this.

The other option you have is to get it as responseText and then parse it with DOMParser. Do you know how to do that or do you need an example?

Originally posted by burnout426:

The other option you have is to get it as responseText and then parse it with DOMParser. Do you know how to do that or do you need an example?

window.addEventListener("DOMContentLoaded", function() {
    var req = new XMLHttpRequest();
    req.addEventListener("load", function(e) {
        var parser = new DOMParser()
        var doc = parser.parseFromString(e.target.responseText, "application/xml");
        alert((new XMLSerializer()).serializeToString(doc));
    }, false);
    req.open("GET", "file.xml", false);
    req.send();
}, false);

That's an *example*. I think that'll work even if you don't have "xsl" in file types.

Originally posted by burnout426:

Originally posted by burnout426:

The other option you have is to get it as responseText and then parse it with DOMParser. Do you know how to do that or do you need an example?

window.addEventListener("DOMContentLoaded", function() {
    var req = new XMLHttpRequest();
    req.addEventListener("load", function(e) {
        var parser = new DOMParser()
        var doc = parser.parseFromString(e.target.responseText, "application/xml");
        alert((new XMLSerializer()).serializeToString(doc));
    }, false);
    req.open("GET", "file.xml", false);
    req.send();
}, false);

That's an *example*. I think that'll work even if you don't have "xsl" in file types.

I found the solution via javascript by simply adding:


myXMLHTTPRequest.overrideMimeType('text/xml');


Thank you again for your precious support, I would never thought about mime type association!

Originally posted by srappose:

myXMLHTTPRequest.overrideMimeType('text/xml');

Ooops. Duh on me. Glad you got it . (Try it with application/xml or application/xslt+xml just to see what happens. application/xml if it works would probably be best for compat)

See <http://annevankesteren.nl/2004/08/mime-types> about text/xml issue.

Just as always Opera is a complete headache!

- Older sites get broken layout (yeah, a few old-school css tricks, but damn, they still work fine in all other standards compliant browsers!) Think about standards? You should have been earlier! Now think about users – online stores get lost clients due to opera updates.

- Everything loads soooooooo sloooooow. Why the heck? My network settings, proxies or what else? Why do I have to bother if all other browsers work fine right after install.

- Oh, and 'Refined Powerful Dragonfly' – whats the sense if it returns 'Could not connect to remote server'!? Damn what server!? Just give me DOM inspector of the loaded page.

Complete headache... Couldn't you just try copy webkit?