// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Use the <code>chrome.downloads</code> API to programmatically initiate,
// monitor, manipulate, and search for downloads.
[permissions=downloads]
namespace downloads {
[inline_doc] dictionary HeaderNameValuePair {
// Name of the HTTP header.
DOMString name;
// Value of the HTTP header.
DOMString value;
};
// <dl><dt>uniquify</dt>
// <dd>To avoid duplication, the <code>filename</code> is changed to
// include a counter before the filename extension.</dd>
// <dt>overwrite</dt>
// <dd>The existing file will be overwritten with the new file.</dd>
// <dt>prompt</dt>
// <dd>The user will be prompted with a file chooser dialog.</dd>
// </dl>
enum FilenameConflictAction {uniquify, overwrite, prompt};
[inline_doc] dictionary FilenameSuggestion {
// The $(ref:DownloadItem)'s new target $(ref:DownloadItem.filename), as a path
// relative to the user's default Downloads directory, possibly containing
// subdirectories. Absolute paths, empty paths, and paths containing
// back-references ".." will be ignored. <code>filename</code> is ignored if
// there are any $(ref:onDeterminingFilename) listeners registered by any
// extensions.
DOMString filename;
// The action to take if <code>filename</code> already exists.
FilenameConflictAction? conflictAction;
};
[inline_doc] enum HttpMethod {GET, POST};
enum InterruptReason {
FILE_FAILED,
FILE_ACCESS_DENIED,
FILE_NO_SPACE,
FILE_NAME_TOO_LONG,
FILE_TOO_LARGE,
FILE_VIRUS_INFECTED,
FILE_TRANSIENT_ERROR,
FILE_BLOCKED,
FILE_SECURITY_CHECK_FAILED,
FILE_TOO_SHORT,
FILE_HASH_MISMATCH,
FILE_SAME_AS_SOURCE,
NETWORK_FAILED,
NETWORK_TIMEOUT,
NETWORK_DISCONNECTED,
NETWORK_SERVER_DOWN,
NETWORK_INVALID_REQUEST,
SERVER_FAILED,
SERVER_NO_RANGE,
SERVER_BAD_CONTENT,
SERVER_UNAUTHORIZED,
SERVER_CERT_PROBLEM,
SERVER_FORBIDDEN,
SERVER_UNREACHABLE,
SERVER_CONTENT_LENGTH_MISMATCH,
SERVER_CROSS_ORIGIN_REDIRECT,
USER_CANCELED,
USER_SHUTDOWN,
CRASH};
[inline_doc] dictionary DownloadOptions {
// The URL to download.
DOMString url;
// 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 ".." will cause an error.
// $(ref:onDeterminingFilename) allows suggesting a filename after the file's
// MIME type and a tentative filename have been determined.
DOMString? filename;
// The action to take if <code>filename</code> already exists.
FilenameConflictAction? conflictAction;
// Use a file-chooser to allow the user to select a filename regardless of
// whether <code>filename</code> is set or already exists.
boolean? saveAs;
// The HTTP method to use if the URL uses the HTTP[S] protocol.
HttpMethod? method;
// Extra HTTP headers to send with the request if the URL uses the HTTP[s]
// protocol. Each header is represented as a dictionary containing the keys
// <code>name</code> and either <code>value</code> or
// <code>binaryValue</code>, restricted to those allowed by XMLHttpRequest.
HeaderNameValuePair[]? headers;
// Post body.
DOMString? body;
};
// <dl><dt>file</dt>
// <dd>The download's filename is suspicious.</dd>
// <dt>url</dt>
// <dd>The download's URL is known to be malicious.</dd>
// <dt>content</dt>
// <dd>The downloaded file is known to be malicious.</dd>
// <dt>uncommon</dt>
// <dd>The download's URL is not commonly downloaded and could be
// dangerous.</dd>
// <dt>host</dt>
// <dd>The download came from a host known to distribute malicious
// binaries and is likely dangerous.</dd>
// <dt>unwanted</dt>
// <dd>The download is potentially unwanted or unsafe. E.g. it could make
// changes to browser or computer settings.</dd>
// <dt>safe</dt>
// <dd>The download presents no known danger to the user's computer.</dd>
// <dt>accepted</dt>
// <dd>The user has accepted the dangerous download.</dd>
// </dl>
enum DangerType {
file,
url,
content,
uncommon,
host,
unwanted,
safe,
accepted,
allowlistedByPolicy,
asyncScanning,
asyncLocalPasswordScanning,
passwordProtected,
blockedTooLarge,
sensitiveContentWarning,
sensitiveContentBlock,
deepScannedFailed,
deepScannedSafe,
deepScannedOpenedDangerous,
promptForScanning,
promptForLocalPasswordScanning,
accountCompromise,
blockedScanFailed
};
// <dl><dt>in_progress</dt>
// <dd>The download is currently receiving data from the server.</dd>
// <dt>interrupted</dt>
// <dd>An error broke the connection with the file host.</dd>
// <dt>complete</dt>
// <dd>The download completed successfully.</dd>
// </dl>
enum State {in_progress, interrupted, complete};
// The state of the process of downloading a file.
dictionary DownloadItem {
// An identifier that is persistent across browser sessions.
long id;
// The absolute URL that this download initiated from, before any
// redirects.
DOMString url;
// The absolute URL that this download is being made from, after all
// redirects.
DOMString finalUrl;
// Absolute URL.
DOMString referrer;
// Absolute local path.
DOMString filename;
// False if this download is recorded in the history, true if it is not
// recorded.
boolean incognito;
// Indication of whether this download is thought to be safe or known to be
// suspicious.
DangerType danger;
// The file's MIME type.
DOMString mime;
// The time when the download began in ISO 8601 format. May be passed
// directly to the Date constructor: <code>chrome.downloads.search({},
// function(items){items.forEach(function(item){console.log(new
// Date(item.startTime))})})</code>
DOMString startTime;
// The time when the download ended in ISO 8601 format. May be passed
// directly to the Date constructor: <code>chrome.downloads.search({},
// function(items){items.forEach(function(item){if (item.endTime)
// console.log(new Date(item.endTime))})})</code>
DOMString? endTime;
// Estimated time when the download will complete in ISO 8601 format. May be
// passed directly to the Date constructor:
// <code>chrome.downloads.search({},
// function(items){items.forEach(function(item){if (item.estimatedEndTime)
// console.log(new Date(item.estimatedEndTime))})})</code>
DOMString? estimatedEndTime;
// Indicates whether the download is progressing, interrupted, or complete.
State state;
// True if the download has stopped reading data from the host, but kept the
// connection open.
boolean paused;
// True if the download is in progress and paused, or else if it is
// interrupted and can be resumed starting from where it was interrupted.
boolean canResume;
// Why the download was interrupted. Several kinds of HTTP errors may be
// grouped under one of the errors beginning with <code>SERVER_</code>.
// Errors relating to the network begin with <code>NETWORK_</code>, errors
// relating to the process of writing the file to the file system begin with
// <code>FILE_</code>, and interruptions initiated by the user begin with
// <code>USER_</code>.
InterruptReason? error;
// Number of bytes received so far from the host, without considering file
// compression.
double bytesReceived;
// Number of bytes in the whole file, without considering file compression,
// or -1 if unknown.
double totalBytes;
// Number of bytes in the whole file post-decompression, or -1 if unknown.
double fileSize;
// Whether the downloaded file still exists. This information may be out of
// date because Chrome does not automatically watch for file removal. Call
// $(ref:search)() in order to trigger the check for file existence. When the
// existence check completes, if the file has been deleted, then an
// $(ref:onChanged) event will fire. Note that $(ref:search)() does not wait
// for the existence check to finish before returning, so results from
// $(ref:search)() may not accurately reflect the file system. Also,
// $(ref:search)() may be called as often as necessary, but will not check for
// file existence any more frequently than once every 10 seconds.
boolean exists;
// The identifier for the extension that initiated this download if this
// download was initiated by an extension. Does not change once it is set.
DOMString? byExtensionId;
// The localized name of the extension that initiated this download if this
// download was initiated by an extension. May change if the extension
// changes its name or if the user changes their locale.
DOMString? byExtensionName;
};
[inline_doc] dictionary DownloadQuery {
// This array of search terms limits results to $(ref:DownloadItem) whose
// <code>filename</code> or <code>url</code> or <code>finalUrl</code>
// 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.
DOMString[]? query;
// Limits results to $(ref:DownloadItem) that
// started before the given ms in ISO 8601 format.
DOMString? startedBefore;
// Limits results to $(ref:DownloadItem) that
// started after the given ms in ISO 8601 format.
DOMString? startedAfter;
// Limits results to $(ref:DownloadItem) that ended before the given ms in
// ISO 8601 format.
DOMString? endedBefore;
// Limits results to $(ref:DownloadItem) that ended after the given ms in
// ISO 8601 format
DOMString? endedAfter;
// Limits results to $(ref:DownloadItem) whose
// <code>totalBytes</code> is greater than the given integer.
double? totalBytesGreater;
// Limits results to $(ref:DownloadItem) whose
// <code>totalBytes</code> is less than the given integer.
double? totalBytesLess;
// Limits results to $(ref:DownloadItem) whose
// <code>filename</code> matches the given regular expression.
DOMString? filenameRegex;
// Limits results to $(ref:DownloadItem) whose
// <code>url</code> matches the given regular expression.
DOMString? urlRegex;
// Limits results to $(ref:DownloadItem) whose
// <code>finalUrl</code> matches the given regular expression.
DOMString? finalUrlRegex;
// The maximum number of matching $(ref:DownloadItem) returned. Defaults to
// 1000. Set to 0 in order to return all matching $(ref:DownloadItem). See
// $(ref:search) for how to page through results.
long? limit;
// Set elements of this array to $(ref:DownloadItem) properties in order to
// sort search results. For example, setting
// <code>orderBy=['startTime']</code> sorts the $(ref:DownloadItem) by their
// start time in ascending order. To specify descending order, prefix with a
// hyphen: '-startTime'.
DOMString[]? orderBy;
// The <code>id</code> of the $(ref:DownloadItem) to query.
long? id;
// The absolute URL that this download initiated from, before any
// redirects.
DOMString? url;
// The absolute URL that this download is being made from, after all
// redirects.
DOMString? finalUrl;
// Absolute local path.
DOMString? filename;
// Indication of whether this download is thought to be safe or known to be
// suspicious.
DangerType? danger;
// The file's MIME type.
DOMString? mime;
// The time when the download began in ISO 8601 format.
DOMString? startTime;
// The time when the download ended in ISO 8601 format.
DOMString? endTime;
// Indicates whether the download is progressing, interrupted, or complete.
State? state;
// True if the download has stopped reading data from the host, but kept the
// connection open.
boolean? paused;
// Why a download was interrupted.
InterruptReason? error;
// Number of bytes received so far from the host, without considering file
// compression.
double? bytesReceived;
// Number of bytes in the whole file, without considering file compression,
// or -1 if unknown.
double? totalBytes;
// Number of bytes in the whole file post-decompression, or -1 if unknown.
double? fileSize;
// Whether the downloaded file exists;
boolean? exists;
};
dictionary StringDelta {
DOMString? previous;
DOMString? current;
};
dictionary DoubleDelta {
double? previous;
double? current;
};
dictionary BooleanDelta {
boolean? previous;
boolean? current;
};
// Encapsulates a change in a DownloadItem.
[inline_doc] dictionary DownloadDelta {
// The <code>id</code> of the $(ref:DownloadItem)
// that changed.
long id;
// The change in <code>url</code>, if any.
StringDelta? url;
// The change in <code>finalUrl</code>, if any.
StringDelta? finalUrl;
// The change in <code>filename</code>, if any.
StringDelta? filename;
// The change in <code>danger</code>, if any.
StringDelta? danger;
// The change in <code>mime</code>, if any.
StringDelta? mime;
// The change in <code>startTime</code>, if any.
StringDelta? startTime;
// The change in <code>endTime</code>, if any.
StringDelta? endTime;
// The change in <code>state</code>, if any.
StringDelta? state;
// The change in <code>canResume</code>, if any.
BooleanDelta? canResume;
// The change in <code>paused</code>, if any.
BooleanDelta? paused;
// The change in <code>error</code>, if any.
StringDelta? error;
// The change in <code>totalBytes</code>, if any.
DoubleDelta? totalBytes;
// The change in <code>fileSize</code>, if any.
DoubleDelta? fileSize;
// The change in <code>exists</code>, if any.
BooleanDelta? exists;
};
[inline_doc] dictionary GetFileIconOptions {
// The size of the returned icon. The icon will be square with dimensions
// size * size pixels. The default and largest size for the icon is 32x32
// pixels. The only supported sizes are 16 and 32. It is an error to specify
// any other size.
long? size;
};
// Encapsulates a change in the download UI.
[inline_doc] dictionary UiOptions {
// Enable or disable the download UI.
boolean enabled;
};
callback DownloadCallback = void(long downloadId);
callback SearchCallback = void(DownloadItem[] results);
callback EraseCallback = void(long[] erasedIds);
callback NullCallback = void();
callback GetFileIconCallback = void(optional DOMString iconURL);
callback SuggestFilenameCallback = void(
optional FilenameSuggestion suggestion);
interface Functions {
// Download a URL. If the URL uses the HTTP[S] protocol, then the request
// will include all cookies currently set for its hostname. If both
// <code>filename</code> and <code>saveAs</code> are specified, then the
// Save As dialog will be displayed, pre-populated with the specified
// <code>filename</code>. If the download started successfully,
// <code>callback</code> will be called with the new $(ref:DownloadItem)'s
// <code>downloadId</code>. If there was an error starting the download,
// then <code>callback</code> will be called with
// <code>downloadId=undefined</code> and $(ref:runtime.lastError) will contain
// a descriptive string. The error strings are not guaranteed to remain
// backwards compatible between releases. Extensions must not parse it.
// |options|: What to download and how.
// |callback|: Called with the id of the new $(ref:DownloadItem).
static void download(
DownloadOptions options,
optional DownloadCallback callback);
// Find $(ref:DownloadItem). Set <code>query</code> to the empty object to get
// all $(ref:DownloadItem). To get a specific $(ref:DownloadItem), set only the
// <code>id</code> field. To page through a large number of items, set
// <code>orderBy: ['-startTime']</code>, set <code>limit</code> to the
// number of items per page, and set <code>startedAfter</code> to the
// <code>startTime</code> of the last item from the last page.
static void search(
DownloadQuery query,
SearchCallback callback);
// Pause the download. If the request was successful the download is in a
// paused state. Otherwise $(ref:runtime.lastError) contains an error message.
// The request will fail if the download is not active.
// |downloadId|: The id of the download to pause.
// |callback|: Called when the pause request is completed.
static void pause(
long downloadId,
optional NullCallback callback);
// Resume a paused download. If the request was successful the download is
// in progress and unpaused. Otherwise $(ref:runtime.lastError) contains an
// error message. The request will fail if the download is not active.
// |downloadId|: The id of the download to resume.
// |callback|: Called when the resume request is completed.
static void resume(
long downloadId,
optional NullCallback callback);
// Cancel a download. When <code>callback</code> is run, the download is
// cancelled, completed, interrupted or doesn't exist anymore.
// |downloadId|: The id of the download to cancel.
// |callback|: Called when the cancel request is completed.
static void cancel(
long downloadId,
optional NullCallback callback);
// Retrieve an icon for the specified download. For new downloads, file
// icons are available after the $(ref:onCreated) event has been received. The
// image returned by this function while a download is in progress may be
// different from the image returned after the download is complete. Icon
// retrieval is done by querying the underlying operating system or toolkit
// depending on the platform. The icon that is returned will therefore
// depend on a number of factors including state of the download, platform,
// registered file types and visual theme. If a file icon cannot be
// determined, $(ref:runtime.lastError) will contain an error message.
// |downloadId|: The identifier for the download.
// |callback|: A URL to an image that represents the download.
static void getFileIcon(
long downloadId,
optional GetFileIconOptions options,
GetFileIconCallback callback);
// Opens the downloaded file now if the $(ref:DownloadItem) is complete;
// otherwise returns an error through $(ref:runtime.lastError). This method
// requires the <code>"downloads.open"</code> permission in addition to the
// <code>"downloads"</code> permission. An $(ref:onChanged) event fires
// when the item is opened for the first time. This method can only be called
// in response to a user gesture.
// |downloadId|: The identifier for the downloaded file.
static void open(long downloadId,
optional NullCallback callback);
// Show the downloaded file in its folder in a file manager.
// |downloadId|: The identifier for the downloaded file.
static void show(long downloadId);
// Show the default Downloads folder in a file manager.
static void showDefaultFolder();
// Erase matching $(ref:DownloadItem) from history without deleting the
// downloaded file. An $(ref:onErased) event will fire for each
// $(ref:DownloadItem) that matches <code>query</code>, then
// <code>callback</code> will be called.
static void erase(
DownloadQuery query,
optional EraseCallback callback);
// Remove the downloaded file if it exists and the $(ref:DownloadItem) is
// complete; otherwise return an error through $(ref:runtime.lastError).
static void removeFile(
long downloadId,
optional NullCallback callback);
// Prompt the user to accept a dangerous download. Can only be called from a
// visible context (tab, window, or page/browser action popup). Does not
// automatically accept dangerous downloads. If the download is accepted,
// then an $(ref: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 $(ref:onChanged) fires.
// |downloadId|: The identifier for the $(ref:DownloadItem).
// |callback|: Called when the danger prompt dialog closes.
static void acceptDanger(
long downloadId,
optional NullCallback callback);
// Enable or disable the gray shelf at the bottom of every window associated
// with the current browser profile. The shelf will be disabled as long as
// at least one extension has disabled it. Enabling the shelf while at least
// one other extension has disabled it will return an error through
// $(ref:runtime.lastError). Requires the <code>"downloads.shelf"</code>
// permission in addition to the <code>"downloads"</code> permission.
[deprecated="Use $(ref:setUiOptions) instead."]
static void setShelfEnabled(boolean enabled);
// Change the download UI of every window associated with the current
// browser profile. As long as at least one extension has set
// $(ref:UiOptions.enabled) to false, the download UI will be hidden.
// Setting $(ref:UiOptions.enabled) to true while at least one other
// extension has disabled it will return an error through
// $(ref:runtime.lastError). Requires the <code>"downloads.ui"</code>
// permission in addition to the <code>"downloads"</code> permission.
// |options|: Encapsulate a change to the download UI.
// |callback|: Called when the UI update is completed.
static void setUiOptions(
UiOptions options,
optional NullCallback callback);
};
interface Events {
// This event fires with the $(ref:DownloadItem) object when a download
// begins.
static void onCreated(DownloadItem downloadItem);
// Fires with the <code>downloadId</code> when a download is erased from
// history.
// |downloadId|: The <code>id</code> of the $(ref:DownloadItem) that was
// erased.
static void onErased(long downloadId);
// When any of a $(ref:DownloadItem)'s properties except
// <code>bytesReceived</code> and <code>estimatedEndTime</code> changes,
// this event fires with the <code>downloadId</code> and an object
// containing the properties that changed.
static void onChanged(DownloadDelta downloadDelta);
// During the filename determination process, extensions will be given the
// opportunity to override the target $(ref:DownloadItem.filename). Each
// extension may not register more than one listener for this event. Each
// listener must call <code>suggest</code> exactly once, either
// synchronously or asynchronously. If the listener calls
// <code>suggest</code> asynchronously, then it must return
// <code>true</code>. If the listener neither calls <code>suggest</code>
// synchronously nor returns <code>true</code>, then <code>suggest</code>
// will be called automatically. The $(ref:DownloadItem) will not complete
// until all listeners have called <code>suggest</code>. Listeners may call
// <code>suggest</code> without any arguments in order to allow the download
// to use <code>downloadItem.filename</code> for its filename, or pass a
// <code>suggestion</code> object to <code>suggest</code> in order to
// override the target filename. If more than one extension overrides the
// filename, then the last extension installed whose listener passes a
// <code>suggestion</code> object to <code>suggest</code> wins. In order to
// avoid confusion regarding which extension will win, users should not
// install extensions that may conflict. If the download is initiated by
// $(ref:download) and the target filename is known before the MIME type and
// tentative filename have been determined, pass <code>filename</code> to
// $(ref:download) instead.
[maxListeners=1] static void onDeterminingFilename(
DownloadItem downloadItem, SuggestFilenameCallback suggest);
};
};