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Comments 1. Facebook Tweet. One comment Drew. The time when the download ended in ISO format. May be passed directly to the Date constructor: chrome. Why the download was interrupted. Estimated time when the download will complete in ISO format. Whether the downloaded file still exists. This information may be out of date because Chrome does not automatically watch for file removal. Call search in order to trigger the check for file existence. When the existence check completes, if the file has been deleted, then an onChanged event will fire.
Note that search does not wait for the existence check to finish before returning, so results from search may not accurately reflect the file system. Also, search may be called as often as necessary, but will not check for file existence any more frequently than once every 10 seconds. The time when the download began in ISO format. A file path relative to the Downloads directory to contain the downloaded file, possibly containing subdirectories.
Absolute paths, empty paths, and paths containing back-references ".. Each header is represented as a dictionary containing the keys name and either value or binaryValue , restricted to those allowed by XMLHttpRequest. Use a file-chooser to allow the user to select a filename regardless of whether filename is set or already exists.
Limits results to DownloadItem that ended after the given ms since the epoch. Limits results to DownloadItem that ended before the given ms since the epoch. Limits results to DownloadItem whose filename matches the given regular expression. Limits results to DownloadItem whose finalUrl matches the given regular expression.
The maximum number of matching DownloadItem returned. Defaults to Set to 0 in order to return all matching DownloadItem. See search for how to page through results. Set elements of this array to DownloadItem properties in order to sort search results. To specify descending order, prefix with a hyphen: '-startTime'. This array of search terms limits results to DownloadItem whose filename or url or finalUrl contain all of the search terms that do not begin with a dash '-' and none of the search terms that do begin with a dash.
Limits results to DownloadItem that started after the given ms since the epoch. Limits results to DownloadItem that started before the given ms since the epoch. Limits results to DownloadItem whose totalBytes is greater than the given integer. Limits results to DownloadItem whose totalBytes is less than the given integer.
Limits results to DownloadItem whose url matches the given regular expression. To avoid duplication, the filename is changed to include a counter before the filename extension.
The DownloadItem 's new target DownloadItem. The size of the returned icon. The default and largest size for the icon is 32x32 pixels. The only supported sizes are 16 and It is an error to specify any other size. Prompt the user to accept a dangerous download. Does not automatically accept dangerous downloads. If the download is accepted, then an onChanged event will fire, otherwise nothing will happen.
When all the data is fetched into a temporary file and either the download is not dangerous or the danger has been accepted, then the temporary file is renamed to the target filename, the state changes to 'complete', and onChanged fires. The type inside the Promise is the same as the 1st argument to callback.
Cancel a download. When callback is run, the download is cancelled, completed, interrupted or doesn't exist anymore. Download a URL. If both filename and saveAs are specified, then the Save As dialog will be displayed, pre-populated with the specified filename. If the download started successfully, callback will be called with the new DownloadItem 's downloadId. The error strings are not guaranteed to remain backwards compatible between releases. Extensions must not parse it.
One thing you need to bare in mind is that this code needs to execute on the page and not your extension - otherwise the user won't see the download action that chrome does. The download will still happen and you will be able to see it in the download tab, but they won't see the actual download happen.
The way you make an action occur on the content page rather than your extension is to use Chrome "message passing". Basically, you pass a message from your extension which is almost like a separate page to the content page that the extension is working with.
You then have a listener that your extension has injected into the content page that reacts to the message and does the download. Something like this:. This is a slightly modified version of Steve Mc's answer that just makes it into a generalized function that can easily be copied and used as is:. Here's a concise way to download a file using "downloads" permission in Chrome manifest using Xan and AmanicA's solution. I did it as follows in Appmator code on Github.
The basic approach is to build your Blob, however you want Chrome has a responseBlob on XmlHttpRequest so you can use that , create an iframe hidden, display:none then assign the src of the iframe to be the Blob.
This will initiate a download and save it to the filesystem. The only problem is, you can't set the filename yet. 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. Making a Chrome Extension download a file Ask Question. Asked 10 years, 10 months ago. Active 2 years, 1 month ago. Viewed 71k times. Improve this question. Franz Payer. Franz Payer Franz Payer 3, 12 12 gold badges 51 51 silver badges 75 75 bronze badges. Add a comment. Active Oldest Votes. After declaring "downloads" permission in the manifest, one can initiate a download with this call: chrome.
Improve this answer. Xan Xan 69k 13 13 gold badges silver badges bronze badges. Is it possible to have Chrome append a file to an existing file? I want to do download a file made of fragments, resulting in one complete file instead of multiple fragtments.
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