I have a rather tricky problem. I work with a client who are restricted to only use HTML, CSS and JavaScript. We have build a form using PHP and Javascript - and currently we only find it possible to embed the form using an iFrame. We have no FTP-access, so the iFrame is loaded from a different domain.
While the form use JavaScript to load new questions and results, this makes it difficult for the height to fit the screen. If the frame fits some of the screens, it will cut off some elements on other screens.
While I am unable to upload any files to the FTP that contains the iFrame, it is not possible to use the helper-file solution, as described here.
So, my question is: is it possible to add a JavaScript action that change the css of the iFrame height, when a specific div id is loaded / action executed?
Thanks in advance! :)
EDIT: I decided to solve this differently. But in case anyone else will stumble across this post, I think the solution offered here might work (if the code is updated to fit the latest jQuery). The main problem in my case seemed to be the limited access to the client domain.
You can't control the parent window document property if the iframe is from different domain. How ever you can try busting out of the iframe.
https://css-tricks.com/snippets/javascript/break-out-of-iframe/
Related
I'm trying to create a web page able to change a site visualization (.css or / and .js) in order to recreate the same live change capability offred by Firebug for Firefox or the Inspector of Chrome.
Here an image to better explain my task:
I have been able to visualize the other site inside my page using the iframe, but unfortunately it is not possible to change its visualization and access its elements due to the "same origin policy".
Is there a way to do this using the iframe or loading the external site inside another element?
Update:
Considering the answers the options should be:
create a php proxy page to load the target site and change visualization on it.
create a browser extention.
I've tried the first, even if it requires to install a web server (xampp), with a simple page calling the function file_get_contents('http://www.site.com');
The page is loaded but unfortunately missed some elements (like images) and it is only a static copy; it is not possible to go further in the site navigation.
Update 2:
Load the entire page via javascript could be the better solution (I don't konw how) if it is possible to live change the code but what about the possibility to interact with this "page copy" and transfer the interaction to the original one?
Scheme:
Explanation:
I've noticed Firebug extention can select and live edit any page element, even if they belong to the iframe which loads an external domain page.
What I'm looking for is a way to act like Firebug, get an element and change its style.
I'm trying to load the site into the iframe beacuse I wanted to create a toolbar above it to select my "visualization styles"; for example a button to makes titles bigger and red.
Anyway I'm open to any other methods suggestions.
Update 3:
I have found an extention for both FireFox and Chrome which is really close to my aim: "Stylish"
This add on allows to live change any site css proprerty and save it in order to reload them every time you'll visit the page.
Now my question is: How can I do the same creating a dedicated page to load and change visualization of a specific site?
FINAL EDIT:
In order to continue this question with a more relevant arguments I decided to ask a new one: create a php proxy page
No. Your solutions may be
to let your own site act as proxy so the same origin policy isn't triggered
to build an extension, which will be browser dependent (Firefox or Chrome) and which will require authorization and installation
I'm not sure if I understand what you want very well, but my feeling to ''trick'' this easier would probably to give very specific height and width to your first site (the iframe) and do a jQuery condition
If ($('body').width() == 500 && $('body').height() == 400 {
$('body').addClass('isiFrame');
}
Then, you only have to do your css .isiFrame .myCoolDivs {....}
You might have to use it on a document ready also, but that could be one way to trick it and since you're not doing it on resize (exepect if somebody's having his screen at this exact width and height at start)
The safer way would probably to create a master session using PHP but I cannot give you an example since it've been to long and echo the body class if the master_session or variable is equal to true
Hope it helped!
If you try to fight Same_origin_policy and try to fight it I am sure you won't get much success their.
Server Side
I would suggest you Handle this on server-side, grab the web-page and apply whatever styling and scripts you want, should be very easy!!
If you use Ruby on rails - Nokogiri gem can help you to parse html. And you can use standard library to 'get' a webpage.
Client Side
If you want to do this on client side, you need to write some jquery/javascript code, you can take following steps:
Get the webpage you want to display.
Grab the element's which include js/css files, remove them and your own.
Display the page in new Iframe present in your page.
Here is the problem! I have an iframe that loads an external website. I want the iframe to resize to 100% based on the content height, so that I don't get a scrollbar. Setting iframe height to 100% does not work.
I came up with two solutions:
Set the document.domain property at both ends to the same domain,
which gives the iframe content access to the parent window. The the
resize method can be initiated from within the iframe.
Use HTML5 postMessage API to take appropriate action. I use to communicate between the two iframes.
Both these approaches are complex. Is there a simpler approach to this problem?
You could embed another iframe into your iframe. If the source of that iframe is from the same domain,protocol and port as the top level iframe then it can access it through parent.parent
I encountered the same problem last year and found a solution that worked for me on this blog:
http://solidgone.org/Set-IFRAME-height-based-on-size-of-remotely-loaded-content
An updated version of that method can be found in his follow-up article: http://solidgone.org/Redux-Set-IFRAME-height-based-on-size-of-remotely-loaded-content
Like jack describes, the implementation requires an embedded iframe into your page with a source of the same parent domain.
I did have a small issue in FF. The solution can be found in the comments of the follow-up article.
Hope this helps!
A simpler solution would be to use this little project on github.
https://github.com/davidjbradshaw/iframe-resizer
I think this option is not avaiable, but maybe you know some strategies for doing it!
I'm on http://www.mydomain.com, and I put an iframe with jquery of another domain :
<div id="myContent"></div>
$('#myContent').html('<iframe id="myFrame" src="www.anotherdomain.com"></iframe>');
Well, the page that I load, www.anotherdomain.com, it's mine, so I can add any kind of code!
What I'd like to do is set the height of myFrame regard the real size of the loaded page (which I can't know, it can changes during the time).
Is there a method where I can comunicate to the parent DOM (mydomain.com) the size of the inserted page (anotherdomain.com)?
I don't know it, I dubt so, but why don't ask.
You can send messages (such as the height of the frame) between iframes on different domains using postMessage: https://developer.mozilla.org/en/DOM/window.postMessage
The only solution I found for that was to pass iframe height via url. You can find my test here :
http://jsfiddle.net/Grsmto/nBWrJ/2/ (updated)
This solution works cross browsers (chrome, ff, ie all versions, mobile etc.) and cross domain.
You MUST have access to the iframe code itself AND the iframe host.
You can refresh the iframe height when you want (even if content change) just by calling the publishHeight() function inside your iframe.
This should work without jquery (mostly writen in pure javascript...).
The only inconvenient is that you will have the height in the url like :
http://www.yourdomain.com/index.html#1458px
But you should easily remove it or change it to something less ugly.
EDIT : It seems that Disqus and Twitter use this library to do that : http://easyxdm.net/wp/
EDIT 2 : On your page you put the code on the first jsfiddle page. In your iframe you put the code of the iframe (the red div "myiframe" in bottom right). Hope it's clear...
But check my link below it should be a better and easier solution.
Cross-domain communications are very limited, and impossible depending on the on the remote host. http://www.ibm.com/developerworks/library/wa-aj-jsonp1/ You can use JSONP to try and retrieve information from the remote site, but its very trying and not for beginners.
The work around that I found that worked for me was I used a server side language instead to include the remote file. so instead of < iframe >
I did a PHP server-side include like:
<?php include 'http://www.example.com/file.txt?foo=1&bar=2'; ?>
This of course only applies if you are using PHP. Once I included it that way I was able to manipulate the DOM elements.
Hiho,
There's an existing website that i need to include into another site which goes like this:
a.mysite.com
and i need to fetch content from this site in my
www.mysite.com
website...
As i need to access the content of the iframe the Same origin policy produces a problem here.
What i did was to configure mod_proxy on Apache to proxy pass all requests from
www.mysite.com/a
to
a.mysite.com
This will work fine...but my problem is that im not sure what the best way would be to include those pages.
1. Idea
As the content of the iframe is a full featured site with a top navigation...left navigation etc....i would need to change the page template to only show the content box to be able to integrate that page in the iframe.
2. Idea
I could just load the DIV where the content lies through JQuery.load() and integrate it into my site.
What is the best way to accomplish such a task? How bad is both ideas from the SEO point of view?
Unless it involves significant rework, the best solution is to combine the two into a single HTML page on the server side (using server-side includes).
Advantages:
No problems with SEO as it's delivered as a single page. Content in iFrames and content loaded via AJAX (with an associated link in the HTML) are traversed, but only the link, not the content itself is associated with the main page. See: http://www.straightupsearch.com/search-marketing/best-practices/seo_iframes_a_g/
Faster page load - either of your suggestions will cause the main page to be loaded first before the other content is loaded.
No reliance on Javascript - your second method will fail completely if javascript is not supported / turned on.
Include all JS and CSS only once - your first method will require these to be duplicated in the <head> of each page. This is more of a long term advantage if you wish to achieve full integration of site "a". However, it can be a disadvantage initially, see below.
Disadvantage:
May cause conflicts with scripts and CSS between the two pages. However, this same problem exists with your second method.
If you must choose between either of the two options you proposed, I would not select the second as others have suggested. Significant amounts of static content should never be loaded via Ajax, and in this scenario gives you no additional benefits. At least iFrames guarantee no JS and CSS conflicts.
Use the 2nd approach (jQuery.load) and if you're working with HTML5, for browsers that support the History API you can change the URL to whatever the content is for that div.
Check out https://github.com/blog/760-the-tree-slider for an example of how github did it for their tree slider.
EDIT:
I am not sure how using an iFrame whose src points to your own domain affects search rankings but at best it's a grey area. I would assume that possibly some pagerank would trickle from the parent to the child but I have no clue how it would work for instance if a blogger linked to your page with the iframe that pointed to another page. This would be a pretty good question to ask at the Webmaster Help Forum
Always say no to iframes. jQuery+Ajax all the way.
I use javascript to expand an Iframe to the size of the document it loads to remove any vertical scrollbar, like so:
function resizeIframes() {
$('iframe').load(function()
{
this.style.height = (this.contentWindow.document.body.offsetHeight + 40) + 'px';
}
);
}
Which works well enough for my uses. But now I need to load the Iframe with a website from another server (actually another subdomain, instead of "www.mydomain.com" it's "services.mydomain.com") and according to Firebug I'm not allowed to read properties from other domains via Javascript. I'm guessing some kind of sandbox problem?!
Is there any way to circumvent this or at least get some kind of info about the size of the content? I even would be willing to check if there is a scrollbar and continually grow the iframe until it's gone, but unlike the window object an iframe object does not seem to have a .scrollbars property.
I am sorry if you find this reply to be incomplete (it is). I just don't have code samples with me. I'll sketch the main concept and you will have to fill out the details yourself.
You have to use some tricks to do that since XSS security does not allow frames from one site to access frames from another site:
site1:page1: call iframe (site2:page1) on site two. Let's assume the iframe ID property is "myframe".
site2:page1: run JavaScript (in body.onload) to calculate the size of the current view (I think you should use document.scrollTop etc.). Also run an iframe (site1:page2) passing the needed width in the query string.
site1:page2: read the query string and find out the requested height, update parent.parent.document.getElementById("myframe").style.height
If it's just another subdomain, document.domain should give you the needed access between frames.