I was recently tasked with loading a portion of my Rails application within an iframe on another website. The relevant pages should be using a different layout file, but only if they're being rendered inside of the iframe. There was a solution proposed here Detect iframe request in a rails app that involved passing a query string parameter.
For example the requesting website could call my application through an iframe with the src of http://foo.com/bar?iframe=true. Then in our controller we could simply check:
def bar
render :template => "iframe" if params[:iframe]
end
This seems like a good solution, but sadly that only works for the initial request as the original query string is completely static. Assuming we have accessible links to other routes within the iframe is there any way of easily relaying the iframe=true request parameter to maintain the correct iframe layout without having to repeat code? Basically I would like to take the DRYest approach possible without breaking any existing functionality. I considered creating another link_to helper which included the logic to relay this parameter if it exists and replacing all of my link_to calls throughout my application; I was wondering if anybody had a better approach though.
I decided to tackle this problem using JavaScript and added the following to my haml layout file:
:javascript
for(i = 0; i< $('a').length; i++)
{
if($('a')[i].href.match(document.domain))
{
$('a')[i].href = $('a')[i].href + "?iframe=true";
}
}
This coupled with my server-side checks for the iframe param will ensure that the appropriate layout is loaded. I decided to only cater this functionality to users who enable JavaScript so it might not be the best solution. The only other problem with this approach lies in controller redirects and forms where I have to manually check for the iframe param and then forward it accordingly - not DRY at all, but I was at least able to put the logic into a controller method. If somebody knowns of a better solution please feel free to leave an answer.
Related
How to redirect to http://google.com in the code .vm file? (I mean within
#if <redirect to Google here> #else ... #end statement)
Doing
setRequestURI('http://google.com')
or similar doesn't work and I'm not sure if it is possible at all.
Thank you.
Can anybody explain please?
IMHO a template is the wrong place to implement logic like this. You should determine upfront (in whatever you do - you don't mention your environment other than velocity), before you determine that the velocity template in question should render the output.
Once you're in the template, you can't assume that you're within a web browser (it might render an email message) or that you have access to the response headers (the template might be rendered as part of a page when the response has already been "committed", e.g. the headers are already sent to the browser.
Do yourself a favor and move the logic further up the chain, out of your velocity template. If you need a quick fix: render Javascript that triggers the redirect. But pay back this technical debt sooner rather than later.
I found this tool(https://code.google.com/p/svg-edit/) very useful, but there is any reference for this project allow to integrate properly in your applicatione instead of simply add it to an iframe?
For example i want to retrieve the svg code for save it in a variables or something like this
It's possible but might be a little tricky to strip out the required resources and load them in your own application while making sure that there aren't any conflicts. This is actually something I plan on doing for one of my own projects.
Do you need to do this though? You can talk to the iframe from your application pretty easily. For example, to get the SVG content you would use this (assuming you only have 1 iframe on the page) ->
var svgedit = window.frames[0];
svgedit.svgCanvas.svgCanvasToString();
I'm new to web development and ASP.NET MVC 4
My question is: Is it possible to replace the content of div tag without needing to refresh the whole page?
If so, what is the best practice of it (best use of MVC 4)?
In order to refresh partial content of a page, you have to use AJAX. There are plenty of resources available online describing how to implement this in ASP.NET MVC. One of the possibilities is using partial views, on which you can find a good tutorial here. However, if you're comfortable with javascript/jQuery a partial view might be overkill if you're just looking to update one div.
Use javascript and make an ajax call. MVC has a JsonResult for the controller you can use if you like.
Not 100% sure but if I remember right, jQuery is bundled with MVC4. Correct me if I'm wrong.
// Javascript code
$('#mydiv').load('/Content/html/mySnippet.html');
Would replace the contents of a <div id="mydiv"></div> with the contents of the /Content/html/mySnippet.html.
You can also call an action and return a partial view if you wish to have dynamic content instead of a static html template.
Situation: I needed to add form with POST method to CMS page. I created custom hook and a module displaying the form successfully. Then I need to react to user input errors eg. when user doesn't enter email address I need to detect it, display the whole page again together with the form and with "errors" in user input clearly stated.
Problem: The problem is to display the WHOLE page again with connected information (eg. about errors etc.). In the module PHP file when I add this kind of code,
return $this->display(__FILE__, 'modulename.tpl');
it (naturally) displays ONLY the form, not the whole CMS page with the form.
In case of this code,
Tools::redirectLink('cms.php?id_cms=7');
I can't get to transfer any information by GET neither POST method.
$_POST['test'] = 1;
Tools::redirectLink('cms.php?id_cms=7&test');
I tried to assign to smarty variables too
$smarty->assign('test', '1');
(I need to use it in .tpl file where the form itself is created) but no way to get it work.
{if isset($test)}...,
{if isset($smarty.post.test)}...,
{if isset($_POST['test'])}... {* neither of these conditionals end up as true *}
Even assigning a GET parameter to url has no impact, because there is link rewriting to some kind of friendly url I guess, no matter I included other argument or not. ([SHOPNAME]/cms.php?id_cms=7&test -> [SHOPNAME]/content/7-cmspage-name)
My question is: is there a way to "redirect" or "reload" current page (or possibly any page generally) in prestashop together with my own data included?
I kind of explained the whole case so I'm open to hear a better overall solution than my (maybe I'm thinking about the case in a wrong way at all). This would be other possible answer.
The simplest method would be to use javascript to validate the form - you can use jQuery to highlight the fields that are in error; providing visual feedback on how the submission failed. In effect you don't allow the user to submit the form (and thus leave the page) until you're happy that the action will succeed. I assume that you will then redirect to another page once a successful submission has been received.
There's lots of articles and how-tos available for using javascript, and indeed jQuery for form validation. If you want to keep the site lean and mean, then you can provide an override for the CMS controller and only enqueue the script for the specific page(s) you want to use form validation on.
If the validation is complex, then you might be best using AJAX and just reloading the form section of your page via a call to your module. Hooks aren't great for this kind of thing, so you might want to consider using an alternative mnethod to inject your code onto the cms page. I've written a few articles on this alternative approach which can be found on my prestashop blog
I have a problem and I dont know how to solve it.
I have a user that log in a web site, and I identify them by session[:user_id] and user has a status page that is defined in user_controller and in status view.
So, I would like to make one page for admin, to see all the statuses from all users on one page, using already written controller and view.
Is that possible?
I could rewrite some of the code, so that I could call with params, like ?user_id=70 and then set session[:user_id]=params[:user_id], but it would be painful if I will have to rewrite whole statuses, beside i would have to maintain same code on 2 different places.
Thank you.
Dorijan
If you need more functionality in your controller, you can add more actions to it. You can also do that in a resourcefull way.
On the other hand it usually is best practice to keep controllers thin.
See: ActionController
In order to make your views reusable, you should use partials.
You could make a _user_status partial.html.erb and render a single partial for a user render all of them for an admin.
Checkout: Layouts and Rendering in Rails