I've a ashx handler which outputs the file, when pinged.
As of now, I have it working by
window.open('url to ping');
I'm happy with the result. But however I'm interested in a better solution, since a user might have turned on popup blocker, which might result in file not downloading.
I can also use jquery ( if that helps )
You can simply use window.location = "http://pathtoyourhandler.ashx" instead.
With appropriate Content-Type the browser will stay on the current page and begin downloading the requested file.
If you do not want a window to open, you could always create a hidden <iframe> that has it's src property set to your link.
We used that work around when simply setting the location did not give the expected result (at least in IE8).
DEMO
Related
so i have this problem with hyperlink attribute download. basically i have link that download a certain file. however it doesnt work..
download file
With this format, it will download the file but it will give me an failed file says 'no file'.
On the other hand if i have link that has a complete uri format:
download file
It redirects me to the page and it will just show the file. The weird
thing is when I tried it on mozilla and brave browser. it works. but
in safari, and my default is google chrome. its not working..
Am I missing something? maybe in my header? really appreciate if you can help.. thanks!
EDITED
also, i've read this stuff about content disposition, so how do i know that my webpage set as inline for that matter.
it turns out, my problem is conflicted by same origin urls. Apprently, I am rquesting from different hosts/site, for further explanation see : https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy
If you look at here https://www.w3schools.com/TagS/tag_a.asp
Scroll down to attributes, and you will see that the DOWNLOAD attribute is only supported by HTML5, which, as it seems, your friend's version of Safari does not support. I recommend updating the program.
Alternatively, you can right-click on the download link, then click Save As..., then download it that way.
This may also be caused js intercepting navigation and redirecting. If so, you may be able to work around it by adding a target attribute.
download file.txt
We have a DotNetNuke module running in an instance of DotNetNuke 5.4.4, installed on "Server A", a Windows Server 2008 R2 Standard machine with IIS 6.1 and Internet Explorer 11.
We're accessing our DotNetNuke module from "Server B", running Windows Server 2008 Standard, with Internet Explorer 9.
The issue happens when we click an anchor html element that has an onclick attribute, while accessing our module on Server B.
The anchor with the onclick is like:
<a onclick='OpenWindow("/DotNetNuke/DesktopModules/Module/View.aspx?dt=%c2%b2%c2");return false;'
href="http://000.00.0.0/DotNetNuke/DesktopModules/Module/View.aspx?dt=%c2%b2%c2"
target='_blank'
jQuery1431968126278="42">Doc name (SSN-SS-SSNN)</a>
And the OpenWindow function is like this
function OpenWindow(url) {
window.open(url, '', 'top=15,scrollbars=yes,menubar=no,height=800,width=800,resizable=yes,toolbar=no,location=no,status=no');
}
As you can see we have an anchor element, with an onclick attribute, where it is supposed to call the OpenWindow javascript function, then return false, so the default action for clicking an anchor (browse to the href) does not happen.
When we click this link though (ONLY on server B), we get no popup window, no breakpoints in the OpenWindow function are hit, and the browser navigates to the href by opening a new tab (View.aspx). This suggests to me that the OpenWindow function referenced by the onclick attribute is not even running for some reason, even though it is on the anchor element, and works on any other server.
What I've tried
I compared the security settings, web.config files, and DotNetNuke settings between the Server A DotNetNuke and my local developer DotNetNuke instances, and found no differences in setup.
I compared the Server B Internet Explorer security settings to my security settings, and found no differences in setup.
On the advice of comments on this question, I tried changing the anchor tag to a span tag instead (removed href and target attributes), and I am seeing the same behavior. It works on Server A and Dev, but doesn't do anything on Server B now. I think the core issue is that either the onclick attribute is not being recognized, or is being blocked somehow.
I've now gone further and changed most of the <a>...</a> tags into <span>...</span> tags, with specific classes, that I then attach jQuery(...).live('click', ...) handlers to (using jQuery 1.4.2). That is allowing the clicks to work, but I still haven't resolved why the onclick attribute is being ignored.
What's weird..
If I open the developer tools (IE9), then click the "Edit" button to turn edit mode on and off again, all of the onclick attributes on anchor tags and img tags start working correctly, until I reload the page.
If I edit the onclick handler in any way manually through the developer tools, like say removing the return false; from the onclick handler, it will work, but if I put the return false; back to make it like I never changed anything, it stops working again.
What I'm trying to figure out
I am hitting a wall with what to check to figure out this issue. I can't reproduce it on my developer machine, and it works on Server A as well, so the code is working perfectly fine.
I'm thinking there must be a setting that I am overlooking somewhere, but where? I have no idea what else to check at this point, and I'm looking for ideas.
I don't have an exact answer, but I can give you the general idea of what is happening and why.
The two servers are not getting identical content -- perhaps they are pointed at different CDNs, perhaps one has an old file of a JavaScript file somewhere -- you'll have to walk through them one by one.
Something, somewhere, is applying an onclick handler to all of your anchor tags.
At first I thought it was something attached to the body element and targeting your links, but I ruled that out. The fact you can edit the HTML and save it and then the link works means you are detaching whatever was attached to that link element.
I would:
Save the entire web page from Site A
Save the entire web page from Site B
Run a diff tool against the two directories.
Have you tried to call window.open directly from the onclick attribute? It could be that the function is not loaded at the time the link is clicked, so it produce an error, so return false is not called, and the link proceed with its default behaviour (in this case open a tab).
If this is the case, look at the loading order of that function, or try placing it in a different part of your code (maybe within the onload event).
Check if you're showing JS errors in your Internet Options.
It might be a bit childish, but since you are opening a window as a Pop Up there can be issue that the URL from the site might be blocked from the browser. It should work at all times if you just replace
window.open(url, '', 'top=15,scrollbars=yes,menubar=no,height=800,width=800,resizable=yes,toolbar=no,location=no,status=no');
with
window.open(url);
Have you tried modifying your tag to:
<a href='javascript:MyFunction(this);' data-url='YourUrl'>Name</a>
MyFunction: function(obj) {
var element = $(obj);
window.open(element.data("YourUrl"));
}
Note that if the user's browser is configured to open Windows as tabs, there is not a workaround. target="_blank" is the best way that I know of to achieve this and enforcing browser behavior via GP.
Sounds like it's something not in the scope of the code you have provided. You mentioned opening the IE9 dev-tools makes it work, I suggest try adding console -polyfill, something like:
if(typeof(console)=="undefined") {
var console = {
log : function() {},
error : function() {},
debug : function() {}
};
}
Just in case some of your code is outputting things into the console and the JS code stops working after that event. Could be some external library, which after loading starts outputting things to the console - that might work differently on different servers because of caching settings and/or network latency.
NOTE: to test this properly, remember to add this into a SCRIPT tag before you load any JS code or import any external library.
This code below runs with jaavascript error in IE 8 browser after window.open('','','width=200,height=100') line of code gets executed. New window gets open but it runs with error "jQuery is undefined". Here I do not use jQuery at all, but sure, I use it all across the site.
var newWindow = window.open('','','width=200,height=100')
newWindow.document.write(someHmtlAsString);
newWindow.document.close();
newWindow.focus();
Does anyone have suggestion why is this so, or is there some bug in IE (hack for IE) which would eliminate javascript error while page renders?
Thanks
It looks like someHmtlAsString that you insert contains some <script> tag that tries to use jQuery. Inspect its content and if that's the case, add tag to load jQuery to it or change code not to use it.
You should set the source of new windows and iframes to about:blank if you want control over them.
You also want to use newWindow.contentDocument || newWindow.contentWindow.document
And it might be a good idea to open() the document before you write() to it.
Update: forgot this:
If you open the window about:blank, it needs time to load..
So you cannot write to it at once!!
So either check if it is loaded (onload), then have it write the source (I prefer this).
OR set timeout of about 50ms (usually) and then write to the new window/iframe.
also note that xhtml does not support document.write!!
Good luck!
I have an external JavaScript file and whether in FireFox or Chrome, whether all browsing data is cleared, it will NOT update no matter what. I believe something happened when I made a backup of my file, which I simply added "_thedate" to the end of the name. Then Save As back to the original name.
Now I cannot seem to get rid of the old JS no matter what unless I change the name of the file, which I really don't want to do, or add the script to the PHP page, which crowds it.
Anyone know the solution to this?
You are sure you are linking to the same file and then editing that same file?
On some browser, you can use CTRL F5 to force a refresh (on the PC). On the Mac, it is Cmd Shift R
Firebug also has a net tab with "Disable Browser Cache".
But I want to give a warning here: even if you can hard refresh, how do you know your customers are getting the latest version? So you need to check, rather than just making sure you and your program manager can do a hard refresh and just go home and take the paycheck next month. If you want to do a job that change the world for the better, or leave the world a little bit better than you found it, you need to investigate more to make sure it works for your customers too (or else, sometimes the customer may call tech support, and tech support may read the script of "clear out the cookies and it will work", which is what happens to me sometimes). Some methods down at the bottom of this post can ensure the customers get the latest version.
Update 2020:
If you are using Chrome and the DevTools is open, you can click and hold the Refresh icon in front of the address bar, and a box will pop up, and you can choose to "Hard Reload" or even "Empty Cache and Hard Reload":
Update 2017:
If you use the Google Chrome debugger, it is the same, you can go to the Network section and make sure the "Disable cache (while DevTools is open)" is checked, in the Settings of the debugger panel.
Also, when you link the JavaScript file, use
<script src="my-js-file.js?v=1"></script>
or v=2, and so forth, when you definitely want to refresh the file. Or you can go to the console and do a Date.now() and get a timestamp, such as 1491313943549, and use
<script src="my-js-file.js?t=1491313943549"></script>
Some building tools will do that automatically for you, or can be configured to do that, making it something like:
<script src="main.742a4952.js"></script>
which essentially will bust the cache.
Note that when you use the v=2 or t=1491313943549, or main.742a4952.js, you also have the advantage that for your users, they definitely will get the newer version as well.
How about adding a '?2' to the tag?
<script src="a.js?2"></script>
The server should return the same file with or without the '?2', but the browser should see it as a different file and redownload. You can just change this query string whenever the file is changed.
adapted from: http://blog.httpwatch.com/2007/12/10/two-simple-rules-for-http-caching/
I've had this problem before, it's very frustrating but I found a work around. Type in the full address of the js file (i.e. yourhost.com/javascript.js) and load it. You will probably see the old version load. Then hit f5 to refresh that page and you should see the new version load. The js file will now be updated in your cache and the code should run as you expect.
The solution I use is.
Using firefox
1. using web developer --> Web Console
2. open the java-script file in new tab.
3. Refresh the new tab you should see your new code.
4. Refresh the original page
5. You should see your changes.
I had this problem and solved in Chrome by just disabling Cache:
- Click F12;
- Go at Network tab;
- Click on "Disable Cache".
A little late to the party, but if you put this in your html, it will keep your website from updating the cache. It takes the website a little longer to load, but for debugging purposes i like it. Taken from this answer: How to programmatically empty browser cache?
<meta http-equiv='cache-control' content='no-cache'>
<meta http-equiv='expires' content='0'>
<meta http-equiv='pragma' content='no-cache'>
Rename your js file to something else temporarily. This is the only thing that worked for me.
The best way around browsercaches is to append a random number to the path of the js file.
Example in pseudo code:
// generate a random number
int i = Random.Next();
echo "<script src='a.js?'" + i + "></script>";
This will make sure your browser always reloads the file, because it thinks it's a different file because of the random number in the url.
The server will always return the file and ignore what comes after the '?'.
In both Firefox and Chrome, that is really annoying, but because of their default settings which can be changed the following way and then they work. I tried in Chrome and Firefox both with same order of steps.
Press F12 (Open Inspector)
Click Network, and then click Disable Cache
Now click Clear icon. In Firefox, it shows as a trash bin icon on left corner, in Chrome it is the second left icon, in between 'stop recording' and 'Filter'.
Now press F5 or refresh the page
They do update the resources with their fresh copy as they re-download them.
In Asp.netcore we can use asp-append-version taghelper
<script src="~/js/site.js" asp-append-version="true"></script>
Are you 100% sure your browser is even loading the script? Go to your page in Firefox and use the console in Firebug to check if the script has been loaded or not.
I have the same problem for awhile, and manage to figure out... And my case was because I have 2 javascript with the same function name.
1.Clear browser cache in browser developer tools
2.Under Network tab – select Disable cache option
3.Restarted browser
4.Force reload Js file command+shift+R in mac
Make sure the fresh war is deployed properly on the Server side
I was going insane trying to get my js files to refresh and I tried everything. Then I did a header check and remembered I was using Cloudflare!
In Cloudflare you can use dev mode to disable proxy.
Don't forget to check any errors in webpack compilation. Sometimes the application.js in app/javascript/packs/ doesn't reload due to webpack compilation error.
When I run into this issue I try this sequence of steps:
Hard refresh the page.
Clear cache + cookies.
Add a static version to my script.
src="my-script-name.js?v=1"
If the above does not help, add a dynamic version to my script:
src="my-script-name.js?v=" + Date.now() + Math.random()
UPDATED
I have a page where i upload an image to crop which opens a window with the required functionality, it works absolutely fine as per below given script, but it doesn't work with IE
<script>
window.open('http://mymachine/mysite/crop.php?bgimagecode1=1281439586.jpg&x=728&y=364&id=30&bannersize=1x2&osCsid=','mywindow','fullscreen=yes,scrollbars=yes');
</script>
please help
Maybe you have IE set to block popups? You have to whiteflag the domain or it won't open. I would check your preferences.
If you are using PHP to generate this string, you should be using urlencode to make sure the URL's querystring is valid.
Don't set the second parameter. It doesn't work in IE... just leave it empty.
window.open('". HTTP_SERVER . "/crop.php?bgimagecode1=".$realname."&x=".$w."&y=".$h."& id=".$_POST['categoryId']."&bannersize=".$_POST['size']."&osCsid=".$_POST['sid']."','','fullscreen=yes,scrollbars=yes');
More info in a previous thread...