You must declare the "downloads" permission in the extension manifest to use this API. Instead of throwing an error when adding duplicate models to a collection, Backbone will now silently skip them instead. Simply create a new Collection with the url of your resource endpoint:. TransferManager can get the progress of a transfer and pause or resume uploads and downloads. Active 3 hr before. Viewed times. Something like:. AmazonServiceException ; import com.
MultipleFileUpload ; import com. TransferManager ; import com. TransferManagerBuilder ; import com. We should fire an event either when the download actually starts, or when it finishes.
This could also be useful to allow the webpage to hide the download link once the user actually starts downloading, rather than when they click the link. The text was updated successfully, but these errors were encountered:. Actually, per the specifications, cloning of the blob should happen once you assign the URL in link.
So you should theoretically be able to revoke it then. Sorry, something went wrong. I thought that cloning happened once loading starts?
Or for a larger set of features? Where is this defined? And parsing happens directly. That's the only deterministic model we could come up with. If this is something browser vendors has agreed is implementable then we can close this request unless we want to keep it open to satisfy the "remove UI when download starts" use case. The above code works perfectly with very large files i. That would be recording the point at which the file has been fully buffered ready to send by the server rather than when it is fully received by the client.
A small file that fits entirely in the buffer therefore can end up in the buffer ready to send before the download is requested while a larger file will only load as much as will fit the buffer and will only reload the buffer once that part of the file content has been sent.
The end of loop will therefore trigger once the portion of the file still to be sent is small enough to fit the buffer rather than when the entire file is received by the client. If you can work out how big the buffer is you could add a delay for that amount of time you assume it would take to send that much data and then you will come very close to getting it right for files bigger than the buffer.
Will it help if I make the size smaller? Will it also have an effect if I change the buffer size of the response?
As in response. I had a real struggle with this exact problem but I found a viable solution using iframes I know, I know. It's terrible but it works for a simple problem that I had. I had an html page that launched a separate php script that generated the file and then downloaded it.
On the html page, i used the following jquery in the html header you'll need to include a jquery library as well :. To break this down, jquery first launches your php script in an iframe. The iframe is loaded once the file is generated. Then jquery launches the script again with a request variable telling the script to download the file. The reason that you can't do the download and file generation all in one go is due to the php header function.
If you use header , you're changing the script to something other than a web page and jquery will never recognize the download script as being 'loaded'. I know this may not necessarily be detecting when a browser receives a file but your issue sounded similar to mine. When the user triggers the generation of the file, you could simply assign a unique ID to that "download", and send the user to a page which refreshes or checks with AJAX every few seconds.
Once the file is finished, save it under that same unique ID and If you don't want to generate and store the file on the server, are you willing to store the status, e. Your "waiting" page could poll the server to know when the file generation is complete. You wouldn't know for sure that the browser started the download but you'd have some confidence. I just had this exact same problem.
My solution was to use temporary files since I was generating a bunch of temporary files already. The form is submitted with:. This will cause the load event on the iframe to be fired. Then the wait message is closed and the file download will then start. Tested on IE7 and Firefox. If you have download a file, which is saved, as opposed to being in the document, there's no way to determine when the download is complete, since it is not in the scope of the current document, but a separate process in the browser.
BUT onload does not fire in IE for file downloads like with the attachment header token. Polling the server works, but I dislike the extra complexity. So here is what I do:. But really, if your sites that busy the long running process will starve you of threads anyways. A quick solution if you only want to display a message or a loader gif until the download dialog is displayed is to put the message in a hidden container and when you click on the button that generate the file to be downloaded you make the container visible.
Then use jquery or javascript to catch the focusout event of the button to hide the container that contain the message. If Xmlhttprequest with blob is not an option then you can open your file in new window and check if eny elements get populated in that window body with interval.
Then the server-side overrides this cookie with an earlier expiration age -- the completion of the server process. As soon as the cookie expiration is detected in the JS polling, "Loading You can rely on the browser's cache and trigger second download of the same file when the file is loaded to the cache.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Detect when browser receives file download Ask Question. Asked 12 years, 4 months ago. Active 3 months ago. Viewed k times. Does anyone have a better idea? Improve this question.
Riyaz Khan 1, 7 7 silver badges 20 20 bronze badges. Thanks Eric -- that's good to know. I won't waste any more time with that approach.
NET folks. Show 2 more comments. Active Oldest Votes. The client algorithm: Generate a random unique token. Show the "waiting" indicator. Start a timer, and every second or so, look for a cookie named "fileDownloadToken" or whatever you decide. If the cookie exists, and its value matches the token, hide the "waiting" indicator. If it has a non-empty value, drop a cookie e. Improve this answer. David Passmore 6, 4 4 gold badges 43 43 silver badges 68 68 bronze badges.
A heads up for others: if document. For some time I thought the issue was the special 'localhost' domain cookie handling stackoverflow. May be that for others though so worth the read.
Do you think that it will, or cookies restrictions will compromise it? Brilliant - it wouldn't have occurred to me in years that you could include cookies as part of a file download. Thank you!! As others have pointed out, this solution only solves part of the problem, the waiting for the server to prepare the file time.
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