I have developed a small component which can be put in to any website. Now, I want to develop a code that could demonstrate how would my component look like on any website.
So, the person would come to my page and put in his URL and then my code should embed my custom JS/CSS in to the downloaded HTML and display it. Something like this.
Here, like the feedback tab, I want to show my component any where on that page.
Try a bookmarklet.
Create a piece of javascript that adds your code into the page such as the following:
javascript:(function(){var%20script=document.createElement('script');script.src='http://www.example.org/js/example.js';document.getElementsByTagName('head')[0].appendChild(script);})()
Add it as the href of a link like so:
Link Text Here
Tell your users to drag the link to their bookmark toolbar and click on it on different websites to try your code out.
Some examples: http://www.reclaimprivacy.org/, http://www.readability.com/bookmarklets
In the example you linked, they are requesting the page specified in the url querystring parameter on the server, and then doing more or less the following steps:
In the <head> tag they are adding a <base href="url" /> tag to the document. The base tag will make any relative links in the document treat the value in the href attribute as their root. This is how they are getting around broken css / images. (The base tag is supported by all browsers)
At the end of the document (IE the </body> tag) they are injecting the javascript that runs their demos.
They serve the modified HTML requested to the browser.
All of this is pretty straight forward in implementation. You could use regular expressions to match the <head> and </body> tags for steps 1 and 2 respectively. Depending on the server platform how you actually request the page will vary, but here are some links to get you started:
C# - HttpWebRequest object documentation
PHP - HttpRequest::send
Nathan's answer is the closest to how we have done the demo feature at WebEngage. To make such a demo functional, you'll need to create a Javascript widget that can be embedded on third party sites. syserr0r's answer on creating a bookmarklet is the simplest approach to do so. Our's is a JAVA backend and we use HttpClient to fetch the responses. As Nathan suggested, we parse the response, sanitize it and add our widget Javascript to the response. The widget JS code takes it on from there to render the Feedback tab and load a demo short survey.
Disclosure: I am a co-founder and ceo at WebEngage.
You can not do this with JQuery due to cross site scripting restrictions.
I suggest you write a PHP script that downloads the URL specified by the user and includes your widget code and then echo it back to the user.
I recommend using bookmarklets. I've made a bookmarklet generator for adding jQuery-enabled bookmarklets to a page to make development easier.
There's a caliper bookmarklet on the page that you can mess around with just to show an example of it working.
Full disclosure, this is something I've made, I'm not trying to be spammy as I think it's relevant: zbooks
You could make an iframe page, which loads their page in the iframe, and uses javascript to inject your code into the iframe.
Here is my approach...
http://jsfiddle.net/L2kEf/
html
<iframe src="http://www.bing.com"></iframe>
<div>I am div</div>
css
div { background: red; position: absolute; top: 20px; width: 100px; left:20px;}
iframe{width: 100%; height: 500px;}
you can add javascript/jquery too, so you could do something like,
jQuery //not 100% sure it would work coz of cross browser thingy, but you know, worth a try.
$('div').click(function (){
$('iframe').contents().html('changed');///
});
if this can't change any of the contents, you can display a dialog, to say it would normally work if it was in your website, then use #syserr0r approach for bookmarked users, for better results, since you are offering this kinda services, to developers, im sure they would know about bookmarking, my approach would be rarely used :) so hope it helps.
I had a problem of a similiar nature, and the main obstacle is the cross-domain policy.
You have to ask the user to put your code in a <script src="..."> or create a proxy solution that would add your code for them.
I went for the proxy and here are my observations:
it's easy to create a basic proxy in php - there are some php proxies on sourceforge and Ben Alman has created a simple php proxy for AJAX. Based on those I was able to create a php proxy altering the content properly in one day.
after that I spent a lot of time making it work with more and more sites with issues. You can never create a perfect proxy.
As an alternative (sa long as you are non-commercial) you can use http://www.jmarshall.com/tools/cgiproxy/ and put the site in an iframe and then do whatever you want to do with the iframes document, as it's in your domain thanks to the proxy. You can access iframeDOMnode.contentWindow.document then, etc.
You can create a Crossrider extension which your users can download.
Then simply add this to your App/Extension code:
appAPI.dom.addRemoteJS("http://yourdomain.com/file.js")
Your users can then download the extension (it works cross-browser for Internet Explorer, Chrome and Firefox) and it will load your JS code on every page load.
You can get an approximation of what it will look like using a iframe. Take a look at that link for an example.
http://jsfiddle.net/jzaun/5PjRy/
The issue with this appoch is that you can't move your DIV(s) when the page scrolls, they are in effect just floating over the iframe. There is no way around this as cross-domain scripting wont let you access the iframe's document to monitor scroll events.
The only other option you have for a better fitting example would be to load the page from the server side in whatever scripting language you are using and load that into the iframe (or into a div, etc.) and you can use javascript all you want as the page is coming from your domain.
For your example of what will your widget look like I imagine floating your DIV(s) over an iframe would give enough of an idea.
Please note the example you gave is using the server side method, not the iframe method.
I agree with the bookmarklet strategy.
I'm a fan of http://bookmarklets.heroku.com/, which lets you generate bookmarklets easily, inject jQuery, etc.
Related
In short , I'm developing a google chrome extension , when I add any url starting with http:// to source attribute to an iframe, I get a message like :
[blocked] The page at 'https://www.facebook.com/' was loaded over
HTTPS, but ran insecure content from 'http://youtu.be/m0QxDjRdIq4':
this content should also be loaded over HTTPS.
and I don't see the content in the iframe !
so how can I overcome this ?
what I want to achieve is that : I hide facebook adds , and in its place I added an iframe instead, I detect when the mouse is hovering over a link contained in a post, then I want to show the link's content in an iframe.
What are my possible alternatives? I don't need to enable showing insecure content in chrome because it is a chrome extension that I will publish!
It seems that the security limit is strict, so we need a way to work around that.
What if you could load the page using other means than an <iframe> and insert it into the page afterwards? There are multiple ways to do that, ranging from more practical to less realistic.
You can use the Chrome captureVisibleTab API to generate a screenshot of a website as an image, exactly what you need. It sounds like you need a visible tab to use this API, but you can actually specify any Chrome window as a target and you can create Chrome windows unfocused and hidden behind the edge of the screen.
If captureVisibleTab provides trouble in step 2, there is also pageCapture API to get an entire page as a single content object.
You can also use a server to create screenshots. Serve a simple application over HTTPS that uses PhantomJS to create a screenshot. An advantage of this approach is your server is likely to be much faster at screenshot generation. The disadvantage is you need to pay for the server.
You could also use xhr in your extension background process (which is not limited by the security limitation) to get the HTML. This wouldn't get any resources, but that could be a beneficial thing if you want a very quick if inaccurate screenshot. Just load HTML, parse and detect links to stylesheets, download them and inject those stylesheets into the HTML as <style> tags.
The resulting HTML can be injected to the <iframe> manually. You could even inject scripts and images this way, but that would be harder and less useful, since you need a quick screenshot of how the page looks like.
I think using built-in Chrome functionality for screenshots is the best bet, if only you can make the user experience good enough.
First and stupid way: change http in link on https. But youtube and I think many other sites don't allow to show their content in iframes. try it and you get Refused to display 'link' in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'.
Second and at least stupid way: remove protocol from link, like //youtu.be/m0QxDjRdIq4 and you get protocol, that on this page. But a situation similar to the previous.
Third way for youtube only: you can generate iframe with src like //www.youtube.com/embed/m0QxDjRdIq4 and user can see the video.
Fourth way, not for all sites: use site API's - not a best solution, but like a option.
Fifth way, but impossible (I think): try to get page's content with javascript and regenerate it in way, that you need.
Sixth way, needs powerfull server: create an service on your server, which will download pages and resend it to users. One problem - linear dependence server's power of requests.
Seventh way, I forgot that it's extension: you can open link in another tab/window, get it content, close tab/window and show content in tab that you need.
Eigth way, the best, I think: use YAHOO yql like this:
$.getJSON("https://query.yahooapis.com/v1/public/yql?q=select"
+"* from html where url='youtube.com/watch?v=m0QxDjRdIq4'"
+"&format=json&diagnostics=true&callback=?"
, function (data, textStatus, jqxhr) {
// process data
}
}
Demo on jsFiddle
I am trying to create a small frame on my site that will show the home page of another site similar to what google is doing with your most viewed pages. I know how to create this with frames but I am really against frames in general for many reasons not worth mentioning. Is there a jQuery plugin somewhere that can do that for me?
For a more visual explanation go here and navigate to 'portfolio'. The current developer is using simple images for what he is doing. I would like those icons to be frames of other sites instead
You want an actual image of a webpage? You'd need something like html2canvas, but that'll be html5 only. There's some methods for doing this in PHP as well, but it's tricky, and I've only heard of this in theory, never actually practiced it myself.
How about this link?
Website screenshots using PHP
To embed an external page within your page, you should check out the <iframe> tag.
As pointed out in the other answer absolutely the best solution to embedding an external site into yours is usually an <iframe>.
You could, in theory, avoid using <iframe>s by pulling in the HTML from the external sites via ajax requests and injecting it into your page, as appropriate, using javascript. This is a much more heavyweight solution however and I wouldn't recommend it to solve your particular problem, but just to point it out.
What I would recommend however is just linking to the sites, potentially with target="_blank" so that the links don't send the browser away from your portfolio.
<iframe>s have their place for certain solutions, but for browsing the different sites you've worked on? No - I'd say the user would benefit from the full browser window experience for that.
The reason I don't want to use ajax to do this is because the part I want to refresh is actually a commenting plugin implemented by other. I just put a snippet of script they provided in my html code and it shows a commenting part under my articles. As it's not a live commenting one, I want to add a refresh button next to it to enable users to just refresh the commenting part to get the latest comments without need for reloading the whole page.
Therefore, I think maybe iframe is an option for me. But the problem is I need to specify the src attribute of iframe. I don't know what value I should use because all I have is just a snippet of script. Can someone give me any idea on this?
By the way, the code snippet is as follows:
<div id="uyan_frame"></div>
<script type="text/javascript" id="UYScript" src="http://v1.uyan.cc/js/iframe.js?UYUserId=1674366" async=""></script>
Just create a html page with the script you talked inside about and use this file in the iframe src attribute.
You can put the snippet above in an html file like this
<!DOCTYPE html>
<html>
<body>
<div id="uyan_frame"></div>
<script type="text/javascript" id="UYScript" src="http://v1.uyan.cc/js/iframe.js?UYUserId=1674366" async=""></script>
</body>
</html>
And then use that file as the src of your iFrame, which you can refresh using javascript.
That said, just because you can do something doesn't mean you should do something. This is a really hacky way of doing what you're trying to do. A few alternative options:
Understand what the script you're using is doing, and work with it. Judging by the name of the script and div in the snippet, it may be creating an iframe to begin with. If thats the case, why not just figure out what that iFrame is called using your browsers debug it and refresh it manually, or modify the script to do so?
Use a live updating framework- This may not be possible for you, I don't know your constraints, but there are plenty of great commenting frameworks out there that do live updates. For instance Disqus comes to mind. Other examples are facebook comments or you could embed a reference to an external site like branch
Use Ajax - I'm a bit unclear on whether this is your script that you're writing, or a 3rd party script. If it is your script, then use the generally accepted methods for doing this type of work, unless you have a really great reason not too. You'll get better support from others, you'll gain more generally applicable experience, and for the most part, best practices gain that name for a reason. People use "ajax" methods for live updating pages because its effective and useful. Frames have become much less common on the web because they're clunky and make it difficult for different parts of the page to interact. If you don't have a great reason not to use the common practice, its usually your best bet.
You could do this :
var iframe = document.getElementById('your_frame_id');
iframe.src = iframe.src;
set the iframe src to its value again, this will cause the frame to refresh, and will work with cross domain frames
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.
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.