I'm talking about something like GreaseMonkey but that would accept the script just as it would be on the website. Adding external scripts to Greasemonkey has been a pain for me so far.
So, I have a client who wanted me to write a specific script for him. Because the script reads the URL of the page visited by a user I can only test it on the website but i don't have access to the source code of the website. I'd like to make sure I deliver to the client a 100% working script so I would love to test it first.
How can I do that? Any plugins that would just allow me to copy the script and would run it every time I load a page of the website?
Obviously, if you can, you want to set up a copy of the page on which the script operates, on a local web server where you can play around with things.
If that isn't possible for whatever reason, you can inject your script directly into their site when you're looking at it with your browser using a bookmarklet. The code to do it is roughly:
var script = document.createElement('script');
script.src = "...the path to your script file, ideally on a local web server rather than a file:// path...";
document.body.appendChild(script);
Once you've tweaked the above (pretty much just supplying the src value), you can turn it into a bookmark via the Crunchinator. Once you have your bookmarket, just visit the site you're developing this for and click your bookmarklet, and your script will be added to the page (just for you, obviously, and just for that visit to the page).
Then your develop/test cycle becomes:
Modify the script file (for instance, to fix a bug)
Open their site
Click your bookmarklet to add your script file to the page
Using something like GreaseMonkey can lead to unexpected results since GM runs outside of the Browsers Sandbox and GM scripts always run after everything else has loaded.
My solution for this would probably be:
Setup a local WebServer
Use "Save page..." to get the page contents, then put them on your localhost
Now add your script to the page etc. and make it work
That gives you A) A flexible development environment and B) more "realworld" results, hell you can even edit you hosts file to use the same URL that your client's page has (of course you need to re-edit the file if you want to visit the original page) and C) you can test in IE etc. too.
Related
I'm working with node-webkit. I want to do something when node-webkit visits some specific URL, but I don't know how to execute a script when node-webkit visits the other URL.
For example http://www.google.com. I can only execute native scripts, but how can I execute a script when I visit another URL like a chrome plugin?
<script type="text/javascript" src="">
document.getElementById('id').click();
</script>
Script like this can only execute when visit my native script. How can I get it to execute when visiting http://www.google.com?
You can always know what the current url is: window.location
For your specific example it seems you misunderstood the point of node-webkit. Nw does not use http protocol; it does use file protocol. You do not navigate from one external web page to another external web page as your application is local (desktop).
Be more specific if you want additional help.
It's better not to include or write scripts directly in the HTML. The disadvantage of this technique is that the script (from which you might want to do some background tasks) will reload (or vanish) every time you reload (or navigate to another page).
'node-main' in package.json is what you need. Here:
https://github.com/rogerwang/node-webkit/wiki/node-main. The scripts stays there even if you visit another page.
Here is my current setup:
I have a script on our Sharepoint.
Each user adds this in a bookmarklet to use it.
If I make an update, they have to go and set up the bookmark all over again.
What I want to do:
User adds script loader to bookmark toolbar
They click it, and it loads the script from our Sharepoint.
This way, if I need to make any changes, they don't have to do anything and changes will be reflected automatically.
My bookmarklets/scripts depend on jQuery to make ajax quests and just for general ease of use.
I am currently using this: http://benalman.com/projects/run-jquery-code-bookmarklet/
Is there a framework that I can use for this kind of thing? I know Visual Event uses a loader, but since it was compressed with Closure, I can't really tell what it's doing. I understand that since things are loaded asynchronously in Javascript, I would have to wrap all my code inside of jquery being loaded, which is fine.. I just need a way to do it.
all you need to do is move your bookmarklet code to an external js file, and then inject that file using a bookmarklet. That way, the bookmarklet injects the latest logic, and you don't have to ever re-bookmark again.
in that external script, you can paste the jQuery.js file's contents above your JS code to make sure it runs as expected.
modify the url to point to your script:
javascript:(function (){document.getElementsByTagName('head')[0].appendChild(document.createElement('script')).src='http://domain.com/scripts/external.js?'+Math.random();}());
if your intranet has decent caching setup, you can remove the "+Math.random()" part, but on an intranet, performance is rarely a problem for on-demand single-url asset loading, the the random url ensure everyone always gets the latest copy.
I have a web service that works through giving users javascript to embed in their code. Users can also place that code on other sites to make it work there. However I also need to allow users to create a blacklist of sites that the JS should not function on. For example, a competitor or an inappropriate site.
Is there a way to check where our JS files are being loaded from, and block loading or break functionality on a per account basis?
Edit: The javascript loads an iframe on the site, so another solution would be to somehow block certain domains from loading an iframe from our server, or serve different content to that iframe
Edit 2: We're also trying to avoid doing this from with the JS because it could be downloaded and modified to get pass the block
Inspecting the url of the page
Yes, the javascript file, when it starts executing, can inspect window.url and see if the url of the main document is ok.
To see where the script was loaded from
It can also go through the dom, looking for the script node which brought in the javascript file itself and see from where the JS was loaded.
However
Anyone can load the javascript into a text editor, then change it to eliminate the tests, then host the modified JS on their own server. Obfuscating or minimizing the JS can slow someone down but obscurity is not security.
One thing you could do is have the javascript load another javascript file. That you serve from the server at a given url. The trick here is that that url will not go to a file but to a server end point that will return a javascript file. The you have that endpoint check for the routes for that user and decide if it will return the javascript you want to work or an error javascript of some kind.
This blog shows how to do it in php.dynamic-javascript-with-php
I'm trying to build a sample bookmarklet to grab current webpage source code and pass it to a validator. Validator is not a an online website, but a folder with bunch of javascript and html files. I'm trying to open file:///C:/Users/Electrifyings/Desktop/Validator/Main.html file with the help of javascript bookmarklet code and put the source code in the textarea in the newly opened window, but it is not working for some reasons that I'm not aware of.
Here is the sample code with algorithm:
javascript:(function(){var t = document.body.innerHTML;window.open('file:///C:/Users/RandomHero/Desktop/test.html',_self);document.getElementById("validator_textarea")=t;})()
Here are the steps:
Grab current web page source code in a variable.
Open locally stored HTML web page in current or new window or new tab (either way is fine with me, but no luck)
Put the source code from the variable into the validator textarea of the newly opened HTML file.
I have tried above code with a lot of variations, but got stuck on the part where it opens the new window. Either it's not opening the new window at all or it is opening blank window without loading the file.
Would love to get some help with this issue, thanks a lot.
Oh and btw,
Windows 7 x64, Tried IE, Firefox and Chrome. All latest and stable builds. I guess it's not a browser side issues, but something related to javascript code not opening the URI with file:/// protocol. Let me know if any more details are needed. :)
You wouldn't want a webpage you visit to be able to open up file://c:/Program Files/Quicken/YourSensitiveTaxInfo right? Because then if you make a mistake and go to a "bad" website (either a sleazy one or a good one that's been compromised by hackers), evil people on the intarweb would suddenly have access to your private info. That would suck.
Browser makers know this, and for that reason they put VERY strict limits to prevent Javascript code from accessing files on a user's local computer. This is what is getting in the way of your plan.
Solutions?
build the whole validator in to the bookmarklet (not likely to work unless it's really small)
put your validator code up on the web somewhere
write a plug-in (because the user has to choose to install a plug-in, they get much more freedom than webpages ... even though for Firefox, Chrome, etc. plug-ins are basically just Javascript)
* * Edit * *
Extra bonus solution, if you don't limit yourself to a purely-client-side implementation:
Have your bookmarklet add a normal (HTML) form to the page.
Also add an iframe to the page (it's ok if you hide it with CSS styling)
Set the form's target attribute to point to the iframe. This will make it so that, when the user submits the form and the server replies back to that submission, the server's reply will go to the (hidden) iframe, instead of replacing the page as it normally would.
Add a file input to your form - you won't be able to access the file within that input using Javascript, but that's ok because your server will be doing the accessing, not your bookmarklet.
Write a server-side script which takes the form submissions, reads the file that came with it, and then parrots that file back as the response. In other words, you'll have a URL that you can POST to, and when it sees a file in the POST's contents, it will respond back with the contents of that file.
Now that you've got all that the user can pick their validator file using the file input, upload it to your server, your server will respond back with the file it just got, and that file will appear as the contents of the iframe.
And now that you finally have the file that you worked so hard to get (inside your iframe) you can do $('#thatIframe').html() and viola, you have access to your file. You can save the current page's source and then replace the whole page with that uploaded file (and then pass the saved page source back to the new validator page), or you can do whatever else you want with the contents of the uploaded validator file.
Of course, if the file doesn't vary from computer to computer, you can make all of that much simpler by just having a server that sends the validator file back; this could be a pure Apache server with no logic whatsoever, as all it would have to do is serve a static file.
Either way though, if you go with this approach and your new file upload script is not on the same server as your starting webpage, you will have a new security problem: cross-domain script limitations. However, these limitations are much less strict than local file access ones, so there are ways to work around them (JSONP, cross-site policy files, etc.). There are already tons of great Stack Overflow posts explaining these techniques, so I won't bother repeating them here.
Hope that helps.
I would like a javascript to run after a page is loaded , like on the example below with a delay of 6seconds. Right after the page loads the rest of JS is lost (obvious)...
Got any ideea how change content after page is loaded without clicking a button?
javascript:window.location = "http://example.com";
setTimeout(function() {
document.getElementById('lightbox').style.display = 'none';
}, 6000);
Once you set window.location the original page will be unloaded before the new page is loaded by the browser. This means your script will be gone before the new page start loading and thus can't modify the new HTML anymore.
This behavior is inherent to the security model of the browser. Without it you could inject any JavaScript into any web site of your choosing, which would be a huge security risk. What you are asking for is so-called XSS (for cross site scripting), which is prevented by the browser applying a so-called SOP (for same-original policy).
There are some common ways to work around this limitation in a safe way:
Set up a proxy to serve both your JavaScript and the original site. This way both your script and the original site come from the same domain and satisfy the browser's same-original policy (SOP). You could run the original site in an iframe with your custom script occupying the top-level window. Alternatively you could inject your script into the HTML as it is being retrieved through your proxy.
Run your script as a browser add-on or user-script. If you choose to do this, the user will have to specifically grant your script the rights to run locally with elevated rights. Greasemonkey popularized client-side scripts for Firefox a few years ago, but recently they seem to have lost momentum.
Ask the site owner to include your script. I doubt this is a valid option for your situation. But if it is a valid option it is definitely the simplest one.
Ask the user to run your script after the site has loaded. This one is probably also not valid for you, but if valid it would once again be a very simple solution.
Your example shows that you are first redirecting and then attempting to hide #lightbox. This script would not work, because you are redirecting the browser to another site before #lightbox gets hidden.
In short, you cannot have Javascript of a previous page manipulate DOM of the next page if you redirect the user to another URL (or even the same URL). Only Javascript that is 'on currently open page' can manipulate currently open page and no other pages.
I have not understood what you are saying. JS is lost? Please be more clear.
I think what you are talking about is the jquery ready function which runs after the DOM is ready. Or in the other case, try using window.onload() function.
This should do the job:
$(window).bind('load', function() {
// your code here
});
Then simply add the delay to your added code with .delay("6000");
The inserted code will only run when your page is completely loaded.