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Represents a file on a file system, as defined in the W3C Directories and Systems specification.
FileEntry
, excluding the path leading to it. (DOMString)FileEntry
. (DOMString)NOTE: The following attribute is defined by the W3C specification, but is not supported:
FileEntry
resides. (FileSystem)FileWriter
object that can be used to write to a file.File
object containing file properties.Look up metadata about a file.
Parameters:
Metadata
object. (Function)Metadata
. Invoked with a FileError
object. (Function)Quick Example
function success(metadata) { console.log("Last Modified: " + metadata.modificationTime); } function fail(error) { alert(error.code); } // Request the metadata object for this entry entry.getMetadata(success, fail);
Set metadata on a file.
Currently works only on iOS.
Parameters:
Quick Example
function success() { console.log("The metadata was successfully set."); } function fail() { alert("There was an error in setting the metadata"); } // Set the metadata entry.setMetadata(success, fail, { "com.apple.MobileBackup": 1});
iOS Quirk
com.apple.MobileBackup
extended attribute is supported. Set the value to 1
to prevent the file from being backed up to iCloud. Set the value to 0
to re-enable the file to be backed up to iCloud.Quick Example
function setFileMetadata(localFileSystem, filePath, metadataKey, metadataValue) { var onSetMetadataWin = function() { console.log("success setting metadata") } var onSetMetadataFail = function() { console.log("error setting metadata") } var onGetFileWin = function(parent) { var data = {}; data[metadataKey] = metadataValue; parent.setMetadata(onSetMetadataWin, onSetMetadataFail, data); } var onGetFileFail = function() { console.log("error getting file") } var onFSWin = function(fileSystem) { fileSystem.root.getFile(filePath, {create: true, exclusive: false}, onGetFileWin, onGetFileFail); } var onFSFail = function(evt) { console.log(evt.target.error.code); } window.requestFileSystem(localFileSystem, 0, onFSWin, onFSFail); } setFileMetadata(LocalFileSystem.PERSISTENT, "Backups/sqlite.db", "com.apple.MobileBackup", 1);
Move a file to a different location on the file system. An error results if the app attempts to:
In addition, moving a file on top of an existing file attempts to delete and replace that file.
Parameters:
FileEntry
object. (Function)FileError
object. (Function)Quick Example
function success(entry) { console.log("New Path: " + entry.fullPath); } function fail(error) { alert(error.code); } function moveFile(entry) { var parent = document.getElementById('parent').value, parentName = parent.substring(parent.lastIndexOf('/')+1), parentEntry = new DirectoryEntry(parentName, parent); // move the file to a new directory and rename it entry.moveTo(parentEntry, "newFile.txt", success, fail); }
Copy a file to a new location on the file system. An error results if the app attempts to:
Parameters:
FileEntry
object. (Function)FileError
object. (Function)Quick Example
function win(entry) { console.log("New Path: " + entry.fullPath); } function fail(error) { alert(error.code); } function copyFile(entry) { var parent = document.getElementById('parent').value, parentName = parent.substring(parent.lastIndexOf('/')+1), parentEntry = new DirectoryEntry(parentName, parent); // copy the file to a new directory and rename it entry.copyTo(parentEntry, "file.copy", success, fail); }
Returns a URL that can be used to locate the file.
Quick Example
// Request the URL for this entry var fileURL = entry.toURL(); console.log(fileURL);
Deletes a file.
Parameters:
FileError
object. (Function)Quick Example
function success(entry) { console.log("Removal succeeded"); } function fail(error) { alert('Error removing file: ' + error.code); } // remove the file entry.remove(success, fail);
Look up the parent DirectoryEntry
containing the file.
Parameters:
DirectoryEntry
. (Function)DirectoryEntry
. Invoked with a FileError
object. (Function)Quick Example
function success(parent) { console.log("Parent Name: " + parent.name); } function fail(error) { alert(error.code); } // Get the parent DirectoryEntry entry.getParent(success, fail);
Create a FileWriter
object associated with the file represented by the FileEntry
.
Parameters:
FileWriter
object. (Function)FileError
object. (Function)Quick Example
function success(writer) { writer.write("Some text to the file"); } function fail(error) { alert(error.code); } // create a FileWriter to write to the file entry.createWriter(success, fail);
Return a File
object that represents the current state of the file that this FileEntry
represents.
Parameters:
File
object. (Function)File
object, such as when the file no longer exists. Invoked with a FileError
object. (Function)Quick Example
function success(file) { console.log("File size: " + file.size); } function fail(error) { alert("Unable to retrieve file properties: " + error.code); } // obtain properties of a file entry.file(success, fail);