I want to check if an application is running on another server and the only way I can do this is by displaying an image that it provides.
If it doesn't provide the image, I use the alt attribute to inform that the app is down.
I cannot modify what's in the image, so I need a way to show something else that says that the app is up instead of saying "if you see this image it means that the app is up".
I'd like a CSS/HTML solution, if not, a JS or PHP one.
I'm thinking of hiding the image itself with the "the app is up" message but I don't know how. It doesn't work like image replacement usually do.
You can choose a custom message to display when the image is down using pure HTML and CSS, but for the image loading successfully, I think you're out of luck. Use a JavaScript Ajax request and check the returned status header, and you won't even have to create an image.
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I have made an web page. There are two iframes
In it. First is of index and second one is description page. I want that when I click on the any index hyperlink, then it is displayed on main description page.
How it will be possible? please give me the HTML code
You can use a button and when clicking it, change the url of the iFrame using Javascript like this:
document.getElementById('iframe-id').src = newLink;
You can use the data-attribute to store the wanted link in your html.
In case you want to do that: It is not possible to react to things outside of an iFrame through an iFrame. So you cannot put a link in iFrame1 and have it reload iFrame2, because those are two different websites and don't see each other.
Now, idk what exactly you are planing to do, but I really hope, that you don't want to make your entire site like that. Using iFrames is really only useful for things like inserting widgets (like Codepen etc.), but should never be used to display information from your own site. If you don't want to copy your html for every site then use PHP. If you don't want to reload your entire webpage (which is pretty much never a problem) you can use AJAX-requests to load parts of your website. (Frameworks like React.js, Angular.js and Vue.js do that for you)
I am wondering if someone can help me with a problem I am encountering with iPhone/iPad. I have an email the generates a report as an HTML attachment. In that HTML attachment, there are two images. One is a static image that pulls down a logo using a normal HTML img tag.
The other is dynamic. It also uses the normal HTML img tag, however it calls out to a web api with some information identifying the user.
<img src="http://MyApiServerName.com/api/User/{id}/{OtherParm}" >
The Web API uses information on the user to return appropriate images to them. For some reason the dynamic image does not show up with the attachment is opened on an iPad/iPhone.
The image works just fine when the attachment is opened from a computer. I thought maybe something might be blocking images, however then I would expect the static image not to display as well. I verified that the "Load Remote Images" setting is turned on.
I am at a loss here. Is there something with iOS that prevents dynamically generated images from showing in HTML attachments?
Thanks
Ok, I can't explain why the above is not working, but I did find something that does. Instead of using the following URL
<img src="http://MyApiServerName.com/api/User/{id}/{OtherParm}" >
use
<img src="http://MyApiServerName.com/api/User/{id}/{OtherParm.jpg}/" >
The final param needs to end with ".jpg/". If the slash is not there, you will get a 404 error.
Then in the API method, you simply strip off the .jpg part of "OtherParm" to get the intended value for "OtherParm".
Suppose there is a html page containing some images.
we want to disable the downloading of the images from user side.
Is that possible?
Should I need to use any javascript or add some attributes in <img> tag?
My current code is
<td><img src="images/handmade (1).jpg" class="img-responsive" alt="" /></td>
</tr>
</table>
Is there any technique to prevent image from downloading?
No, it cannot be done. Explanation here: https://graphicdesign.stackexchange.com/a/39464/24086
For all intents and purposes, this is downright impossible.
You can disable right click, but people can still view the source code of your page (by adding view-source: to the URL in Chrome, or just using a browser menu) and find the URL.
You can use a CSS background-image instead of HTML , but people can still use their browser's inspector (F12 for most browsers) and find that element's CSS properties.
You can engineer some crazy thing that you think will work, but at the end of the day, the user has to download the image in some way to see it. If the user is completely unable to download the image, he/she won't even be able to see it in the first place! No matter what you do, nothing will prevent a simple glance at a network traffic monitor or the "Network" tab of your favorite browser's developer tools.
Depends what you mean by downloading, really.
The user has to be able to download the image (i.e. retrieve the image onto their computer) in order to display the image in their browser. I suspect what you mean is that you want to stop them saving that specific image onto their computer. Any attempt to try and stop them doing this is pretty pointless, as they can always take a screenshot, or just access the image directly using the URL.
I've seen various attempts using javascript to try and stop users from saving images, but they are all easily worked around.
Cut up the image server-side and store them that way, then assemble them as one image in javascript client-side. The user could download each segment via URL and assemble them manually, but that is much more work than most users are willing to do.
This is weird!
I have set up a form using RapidMailer, and on an external site it works fine. (Just to complicate matters, the form is within a <div> as I display a background image, and then use the <div> to position the signup box halfway down the page)
But ...
Put it within an Facebook (Thunderpenny) StaticHTML page, (which I think is <iframe>?) and whilst I can enter name/email, and the submit button shows mouse up/mouse down events, it just won't submit.
I tried adding "pointer-event:auto" to the div so that it was to the fore, but no go. And no good asking the app creator as I doubt I'll get a response. Anyone any ideas? (** I could include page code, but it's 90% links to external js files Rapidmailer sets up)
Is it 'cos I got a <div> within an <iframe>? Do I need to add an <object> to the code somewhere???
It turns out that for some reason, the HTML code cannot find / use the javascripts even with direct URL's. I strongly suspect it's to do with "cross browser" limitations. In otherwords, the StaticHTML <iframe> is on one server, and the HTML code is trying to access javascript on a second server. And as the RapidMailer script is using three scripts direct from jquery.com, it's difficult to know what can be eliminated as they all contain error trapping routines.
In the end, I had to add a direct link to a status update on the Facebook page, and redirect it to the signup form on my blog. I then pinned the post the top. Alas, now for some reason it won't display a graphic with the link, and instead insists on showing the URL itself! Oh well!
I am wondering if there's a way I can embed a webclip into a webpage, as in, I can have a portion of a webpage embedded as a widget into another page. I was thinking it might be possible someway though Mac OS X's Dashboard widgets, one can take a webclip and make a dashboard widget, as I hear that they are HTML based, and thus one could reverse-engineer one into simple HTML code. Kind of the reverse of what google does for gadgets. Any ideas? I'm open to any solutions.
Thanks.
The easy, html-based way is with an iframe. What this does is put an entire webpage within a box on your page. You don't have much flexibility with it.
You can also do it with javascript. JQuery makes it easy with their .load() method. Going this route, you can load a webpage with javascript, load specific tags within that page, or even modify the incoming code before displaying it.
Most basically:
$("#xxxx").load("url.html");
Where xxxx is the id of the html tag where you want the content to be loaded on your page (e.g. if you have <div id="xxxx">content will go here</div> in your HTML). See more details at: http://docs.jquery.com/Ajax/load.
If these don't suffice, the next step would be PHP (I doubt you'd need it, but if you'd like to, you car search for file_get_contents on php.net).