I have a simple flex application that I created for testing. I download "flex-iframe-1.4.6.zip" library and using this library I am trying to display a url. But it does not show the web page instead it shows an error: "This content cannot be displayed in a frame".
<flexiframe:IFrame id="mapIFrame" visible="true"
source="http://www.google.com" width="500" height="500" label="Google"/>
How can I solve this problem?
The message "This content cannot be displayed in a frame" is coming from Internet Explorer.
See IE8 Security Part VII: ClickJacking Defenses:
Web developers can send a HTTP response header named X-FRAME-OPTIONS
with HTML pages to restrict how the page may be framed. If the
X-FRAME-OPTIONS value contains the token DENY, IE8 will prevent the
page from rendering if it will be contained within a frame. If the
value contains the token SAMEORIGIN, IE will block rendering only if
the origin of the top level-browsing-context is different than the
origin of the content containing the X-FRAME-OPTIONS directive.
google.com`s current response header contains: X-Frame-Options: SAMEORIGIN
So the answer is: you can't use http://www.google.com in an iframe.
Accordingly, the example in the flex-iframe users guide is outdated (last edit 2 years ago).
Related
I m trying to add amazon site in my website using iframe. But it fails by giving me the message as www.amazon.com refused to connect..
However other websites are working fine for the same iframe code.
iframe code:
<iframe src="https://www.amazon.com" width="800" height="600"></iframe>
Any help on explaining this mystery and possibly helping me add the amazon site as iframe is greatly appreciated.
I tried out your embed code in Chrome and saw the following error:
www.amazon.com refused to connect.
It means that the origin server does not authorize you to show this content inside an iframe.
The amazon product details page request returns the following response header:
X-Frame-Options: SAMEORIGIN
The X-Frame-Options HTTP response header can be used to indicate whether or not a browser should be allowed to render a page in a <frame>, <iframe>, <embed> or <object>. Sites can use this to avoid click-jacking attacks, by ensuring that their content is not embedded into other sites.
The added security is provided only if the user accessing the document is using a browser that supports X-Frame-Options.
I am trying to use a simple iframe on my website. But it is not showing up. Please see the screenshot. This is my code:
<iframe src="https://www.w3schools.com"></iframe>
What am I doing wrong? Thanks
Your code is right, it's w3schools.com that's the problem. Opening up the developer console reveals this:
Refused to display 'https://www.w3schools.com/' in a frame because it set 'X-Frame-Options' to 'sameorigin'.
This means that w3schools.com will only work in a frame when the "origin" (the website your frame is on) is from w3schools.com. Otherwise, you'll just get a blank frame.
Pages from W3Schools are not displayed in iframe elements from different server because the W3Schools site implements an iframe blocking policy. In order to do this, it uses the X-Frame-Options. (See also how to block website from loading in iframe?.)
You can check whether a site implements this policy by inspecting its HTTP headers. For example, in Firefox, press F12 to open the inspection tools, then go to Network, select one of the objects that were sent over HTTP and look at the headers (or filter the headers for e.g. "x-frame"). Below is what this looks like for W3Schools:
Notice x-frame-options: SAMEORIGIN in the lower right part of the screenshot. With x-frame-options: SAMEORIGIN (or on some other sites x-frame-options: DENY) set on the server side, you will not be able to load pages from that site inside an iframe or a frame.
For more background, see X-Frame-Options – How to Combat Clickjacking, which also explains other values that can be used in the x-frame-options header.
If you want to test with a webpage from a server that does not block loading in iframes, try for example https://wiki.archlinux.org/.
I am attempting to embed one site into another site. I control both servers, which I will refer to here as "site1.com" (the site in the browser) and "site2.com" (the site I am trying to embed).
HTML embed code
Attempt 1, using iframe tag:
<iframe height="600" width="600" name="my other site"
src="https://site2.com/foo/bar">
Unable to display--your browser does not support frames.
</iframe>
Attempt 2, using object tag:
<object type="text/html" height="600" width="600" name="my other site"
data="https://site2.com/foo/bar"></object>
Things I know are not the problem
Secure/insecure mismatch
I've read that Firefox will not allow an HTTP embed into an HTTPS page. Both sites are HTTPS, so there is no mismatch. The loaded resources (CSS, etc) are also https, from same origin, so there is no mixed-content problem.
I have tried setting security.mixed_content.block_active_content to false, in case I was mistaken about this, but the iframe was still blank.
Invalid or untrusted certificates
Both sites are using valid certificates, signed by a proper trusted authority, and are not expired. In fact, we are using a subdomain wildcard certificate, so they are both using the same certificate (they both are in the same subdomain).
X-Frame-Options
The site that I am trying to embed has this response header:
X-Frame-Options: ALLOW-FROM SITE1.COM
Content-Security-Policy
The site that I am trying to embed has this response header (wrapped here for readability):
Content-Security-Policy:
frame-ancestors https://site1.com;
default-src 'self';
script-src https://site1.com 'self' 'unsafe-inline';
style-src https://site1.com 'self' 'unsafe-inline'
Extra disclosure, possibly not needed - these headers are being generated by a Django application server, using this config and the "django-csp" module.
X_FRAME_OPTIONS = 'Allow-From site1.com'
CSP_FRAME_ANCESTORS = ('https://site1.com',)
CSP_STYLE_SRC = ('https://site1.com', "'self'", "'unsafe-inline'")
CSP_SCRIPT_SRC = ('https://site1.com', "'self'", "'unsafe-inline'")
CORS
My understanding is that CORS is only in play when the request contains an "Origin" header. That doesn't seem to be happening here. I have also tried addressing CORS by using this header:
Access-Control-Allow-Origin: https://site1.com
But that appears to have no effect.
Ad blocker
I do not have an ad blocker in this Firefox install. I also removed all of my extensions and re-tested after a Firefox restart, the "blank iframe" behavior remains the same with no extensions installed at all.
Observed behavior
I have tested using the following browsers.
Google Chrome 58.0.3029.81 (64-bit) (macOS)
Safari 10.1 (macOS)
Firefox 53.0 (64-bit) (macOS)
Microsoft Edge 38.14393.0.0 (Windows 10)
Using Chrome, Safari, and Edge, the frame is shown like I expect - site2.com appears as a box inside of the site1.com page.
Using Firefox, I am shown an empty space of the size specified (600x600). If I used iframe, then there is a black border around it. If I used object, it's just a blank area with no border.
The most interesting thing is that if I open the developer console and reload the page, I see the requests to fetch site1.com and its CSS and so on, but there are no requests made for site2.com. It isn't that there is a problem showing site2.com, it is never requested at all.
Also, the developer console shows no errors or warnings about this. If there were an error condition or security exception preventing the loading of the second site, I would expect some sort of warning to be logged.
This has been driving me crazy for a few days. Any suggestions appreciated.
I reproduced the issue on my server which serves 2 domains, and then fixed it this way:
X-Frame-Options: ALLOW-FROM https://SITE1.COM
I added https://, as seen in MDN page for X-Frame-Options
You can observe the difference here (only with Firefox of course, as with other browsers both frames are shown): I pushed a php page that inserts the header without or with https://, and created this fiddle that insert 2 iframes: Firefox shows first iframe as empty, and second one with content (which echoes the value in header) on the right.
Since you are forced to put a "serialized origin" (protocol+FQDN), I wondered if you can put multiple entries, or wildcards. My understanding of RFC 7034 says you cannot.
Now about this detail:
The most interesting thing is that if I open the developer console and
reload the page, I see the requests to fetch site1.com and its CSS and
so on, but there are no requests made for site2.com. It isn't that
there is a problem showing site2.com, it is never requested at all.
That's because it was cached. I also saw that, but a force-refresh rightly showed a new request was made.
If you knew the source code (right click and view source of url to embed - but you control it in this case so you can copy and paste) and it was only a reasonably small amount of code (probable because you're using an iframe), then you could use the HTML5 srcdoc attribute to embed the html code, instead of pointing to the url. This would save a lot of hassle regarding unknown factors regarding the site you want to embed (CORS etc..) which you would not usually know if you didn't have control over the second site.
According to caniuse.com the srcdoc property has full support in Firefox since vsn 25 onwards (so since Sept 2013).
Hope this helps (Here's a tested jsfiddle example)
I am trying to load a simple iframe into one of my web pages but it is not displaying. I am getting this error in Chrome:
Refused to display 'https://cw.na1.hgncloud.com/crossmatch/index.do' in a frame because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'self' https://cw.na1.hgncloud.com".
Invalid 'X-Frame-Options' header encountered when loading 'https://cw.na1.hgncloud.com/crossmatch/index.do': 'ALLOW-FROM https://cw.na1.hgncloud.com' is not a recognized directive. The header will be ignored.
This is the code for my iframe:
<p><iframe src="https://cw.na1.hgncloud.com/crossmatch/" width="680" height="500" frameborder="0"></iframe></p>
I am not really sure what that means. I have loaded plenty iframes before and never received such errors.
Any ideas?
It means that the http server at cw.na1.hgncloud.com send some http headers to tell web browsers like Chrome to allow iframe loading of that page (https://cw.na1.hgncloud.com/crossmatch/) only from a page hosted on the same domain (cw.na1.hgncloud.com) :
Content-Security-Policy: frame-ancestors 'self' https://cw.na1.hgncloud.com
X-Frame-Options: ALLOW-FROM https://cw.na1.hgncloud.com
You should read that :
https://developer.mozilla.org/en-US/docs/Web/Security/CSP
https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy
The reason for the error is that the host server for https://cw.na1.hgncloud.com has provided some HTTP headers to protect the document. One of which is that the frame ancestors must be from the same domain as the original content. It seems you are attempting to put the iframe at a domain location that is not the same as the content of the iframe - thus violating the Content Security Policy that the host has set.
Check out this link on Content Security Policy for more details.
For any of you calling back to the same server for your IFRAME, pass this simple header inside the IFRAME page:
Content-Security-Policy: frame-ancestors 'self'
Or, add this to your web server's CSP configuration.
In my case it was that the site i was embedding had a specific url for embedding content and a different url for sharing
the url i had set in the iframe was
https://site/share/2432423232
changing it to
https://site/embed/2432423232
worked for me
The same issue appears to me, don't open the page in a private window.
You can use multiple browsers if you need to log in with different users.
I have a website which is hosted via my providers webhosting.
I have bought another domainname and forwarded my current website to it.
The technique it uses is cloacking, so my old website is a frame in my new domain.
Everything works perfectly but when I click a hyperlink that goes outside the website (e.g. facebook page), the page won't show.
I have the following error in my Google Chrome console:
Refused to display Hyperlink in a frame because it set X-Frame-Options to DENY.
Any link, tutorial help will be appreciated.
The X-Frame-Options is submitted by pages if they don't want to be displayed in frame or iframe (see mdn: The X-Frame-Options response header)
The message tells you that Facebook tells the browser, that it does not want to be displayed in a frame. To solve this problem you need to set the target attribute for these links to _top or _parent. But be award that the user could prevent these options by browser extensions.
If you plan to use the second domain instead of the first one you should think over doing a 301 redirect. What you should avoid is to find a solution that displays the same content (without iframe) on both domains, because of double content.