MozRepl

Posted October 19th, 2007 by bard

MozRepl documentation has moved. Go to the new home »

Connect to Firefox and other Mozilla apps, explore and modify them from the inside, while they're running.

Execute Javascript, play with browser GUI, sneak into HTML pages, examine functions and variables, redefine them on the fly, hot-fix bugs, ... MozRepl itself is programmable from within MozRepl.

MozRepl is part of MozLab.

Watch the video: Exploring the browser, online docs, entering web pages, modifying the REPL

On October 29th, 2007 she (not verified) said:

Not bad. But still, aside from all the niceties which will surely come, I still still still hope that one day I can use a language such as ruby instead of Javascript to control the aspects ... even if i use it only locally ;)

On October 29th, 2007 Anonymous (not verified) said:

Well why don't you get on that then.

On October 31st, 2007 mishoo (not verified) said:

Dude, that's absolute coolness. Thanks for this great piece of work.

On November 1st, 2007 bard said:

Woah. Thanks! :-)

On December 13th, 2007 Anonymous (not verified) said:

this rocks, reload current page from inside emacs with one keystroke, you have saved me a million <ctrl> <x> <s> , <alt> <tab>, <ctrl> <r>, <alt> <tab>

On December 27th, 2007 Jordan Kanter (not verified) said:

Awesome, I love this. I use it all the time! Great work!

On February 29th, 2008 ME (not verified) said:

I am looking for a MoxRepl - Python module. Does it exist?

On March 20th, 2008 Steveorevo (not verified) said:

I would have loved to have used this, but on XP after I telnet in, it just attempts to process every keystroke I type in the telnet session vs waiting for a cr/lf, is there something I'm doing wrong? Seems like I can't type a single word, as each keystroke gets processed, i.e. if I try to type quit

repl> q @data:application/x-javascript,q:1 !!! ReferenceError: d is not defined

repl> u @data:application/x-javascript,u:1 !!! ReferenceError: d is not defined

repl> i @data:application/x-javascript,i:1 !!! ReferenceError: d is not defined

repl> t @data:application/x-javascript,t:1 !!! ReferenceError: d is not defined

On March 20th, 2008 bard said:

Hi,

check out the first item on the page about troubleshooting.

On April 10th, 2008 Anonymous (not verified) said:

I am also experiencing the problem described by Steveorevo, every key stroke is getting the Reference error despite entering a ; as the first character or last or anywhere in between, what can solve this?

On April 13th, 2008 bard said:

Quoting from the troubleshooting page:

On Windows, telnet will probably start in character-at-a-time mode. To put it into line-at-a-time mode, press the escape combination (usually Control+]) and enter the command:
set mode console
Windows 2000 telnet has been reported to have no such option. If that is the case, try putty instead.

On May 2nd, 2008 dejavu-cat (not verified) said:

If I want to get the entire page html dump (including those in IFrame, Frame & those that is generated by the javascript), is it possible with REPL?

On May 8th, 2008 bard said:

You can get a document dump using something like:

var dump = (new XMLSerializer()).serializeToString(document);

For iframes, the containing document only has the tag, so you'd have to get and dump the frame documents separately.

On May 13th, 2008 dejavu-cat (not verified) said:

Thks bard, it do provide a good pointer.

however, i am still abit lost, Probably this is due to the dom object modeling inside firefox get me confused.

using javascript, if we wanted to get reference to the frames, we can do it just by typing:
document.FRAME_NAME.etc.etc

I tried to do it using repl, but it can't dump the frame documents. am I doing the right way?

thks in advance.

On May 14th, 2008 dejavucat (not verified) said:

I found the way to do it, via the frames arrays to access the frames documents.

Here is another question, can we possible to control an event for a particular dom element? e.g. I would like to click on a button, or click on a link etc. etc.

Do we need to write the custom function (I believed jquery is doing it) for repl? or it is supported by itself?

thanks in advance.

On May 15th, 2008 dejavucat (not verified) said:

I managed to get the click event handler on the dom using custom script (basically the custom script is only used to shorten the typing in repl.

Soon after finishing it, I finally managed to run tru my application entirely via repl. But I encounter issue with page loading.

Currently when there is javascript/links that we click/execute that changes the documents of a certain pages (e.g. from www.google.com going to www.yahoo.com), the call return directly even though the latter pages is not yet displayed.

Not sure this is the right place to ask, it more sounded like the mozilla things, but just to keep everything in one place, how do we listen to the page load? how do repl console get notify when pages are finish loading?

For information, I am scripting using telnet as interface, connected tru repl to control pages in my application.

On May 15th, 2008 bard said:

Yes, it's not MozRepl-specific, but to listen for web page loads when you are in chrome (like you are when you're using MozRepl) one way might be:


getBrowser().addEventListener('load', function(event) {
    myOnLoadHandler(event); 
}, true);

Keep in mind that myOnLoadHandler will be invoked on every page load, not just the next one.

You can probably find useful snippets on http://developer.mozilla.org and perhaps something in the archive of http://groups.google.com/group/mozlab.

On July 3rd, 2008 Anonymous (not verified) said:

I'm trying to update a project that was working with MozLab 0.18 to 0.19. I was having some problems, so I tried accessing manually.

I found that if I open a telnet session and paste in more than 1024 characters of javascript code into the telnet window the connection is dropped with no errors being given. Is this a problem with MozRepl?

On August 27th, 2008 Ryszard Szopa (not verified) said:

Hey, MozRepl looks like THE tool that will allow me to enjoy JS hacking. However, my Firefox 3 says I cannot install it. Is it something important, or just the matter of changing versions the add-on is supposed to work with? Please, make my life suck less! :-)

On August 29th, 2008 bard said:

I don't see that problem here. Does it happen consistently with >1024 characters, regardless of the content? Does it happen across clients too (netcat, telnet, putty...)?

On August 29th, 2008 bard said:

@ryszard: Try 0.2 from this site, should fix it. :-)

On August 31st, 2008 Ryszard Szopa (not verified) said:

@bard: You are my hero. MozRepl has just made my life less miserable by an order of magnitude. BTW do you know Slime, the Common Lisp emacs uebermode? It's given me the best programming experience ever, and MozRepl looks like a step in that direction.

On September 20th, 2008 bard said:

@ryszard, I know Slime, it's for a large part the work of one of my heroes. :) Saying that MozRepl is a step in that direction is possibly the best compliment you could give it, thanks. :)

On October 29th, 2008 Anonymous (not verified) said:

Can someone point me to the install instructions. I'm testing with w3af and it requires mozrepl, so I downloaded and don't see instructions. All links point to git, but don't see how to install. thx

On November 7th, 2008 bard said:

Just click on http://repo.hyperstruct.net/mozrepl/devel/mozrepl.xpi from Firefox, it will get installed.

hyperstruct

MozRepl

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