Cordova download local file

Temporary storage may be deleted by the operating system if the device runs low on memory. When you are using temporary storage, you can create or get the file by calling getFile.

As in the persistent storage example, this will give you a FileEntry object that you can use for read or write operations. Once you have a FileEntry object, you can write to the file by calling createWriter , which returns a FileWriter object in the success callback.

Call the write method of FileWriter to write to the file. You also need a FileEntry object to read an existing file. Use the file property of FileEntry to get the file reference, and then create a new FileReader object. You can use methods like readAsText to start the read operation. When the read operation is complete, this. Of course, you will often want to append existing files instead of creating new ones. Here is an example of that. This example shows another way that you can access the file system using window.

In this example, pass the cross-platform Cordova file URL, cordova. The success callback receives a DirectoryEntry object, which you can use to do things like create a file. In addition to this usage, you can use resolveLocalFileSystemURL to get access to some file system locations that are not part of the sandboxed storage system.

See Where to store Files for more information; many of these storage locations are platform-specific. For the append operation, there is nothing new in the createFile function that is called in the preceding code see the preceding examples for the actual code. In writeFile , you check whether an append operation is requested. Once you have a FileWriter object, call the seek method, and pass in the index value for the position where you want to write.

In this example, you also test whether the file exists. After calling seek, then call the write method of FileWriter. We already showed how to write to a file that you just created in the sandboxed file system. What if you need to get access to an existing file and convert that to something you can store on your device? In this example, you obtain a file using an xhr request, and then save it to the cache in the sandboxed file system.

Before you get the file, get a FileSystem reference using requestFileSystem. By passing window. For completeness, here is the xhr request to get a Blob image. There is nothing Cordova-specific in this code, except that you forward the DirectoryEntry reference that you already obtained as an argument to the saveFile function. You will save the blob image and display it later after reading the file to validate the operation.

After getting the file, copy the contents to a new file. The current DirectoryEntry object is already associated with the app cache.

After writing to the file, read it and display it. You saved the image as binary data, so you can read it using FileReader. After reading the data, you can display the image using code like this. Use window. For example, on Windows 10, you can include ms-appdata: in your element. Here is an example. To be able to access the root folder you need to provide superuser access to your folders.

At the moment this folder is empty. Let us now add a function that will create the log. We will write this code in index. The size that will be required for storage is valued in bytes 5MB in our case.

In this step, we will write some text to our file. We will again send a request to the file system, and then create the file writer to be able to write Lorem Ipsum text that we assigned to the blob variable. For backwards compatibility, this can also be the full path of the file on the device. See Backwards Compatibility Notes below. Invoked with a FileTransferError object. A FileUploadResult object is passed to the success callback of the FileTransfer object's upload method.

If set to true , it accepts all security certificates. This is useful because Android rejects self-signed security certificates. Not recommended for production use. Supported on Android and iOS.

Aborts an in-progress transfer. This attribute is only available when a response code is received from the HTTP connection. This attribute is only available when a response is received from the HTTP connection. Previous versions of this plugin would only accept device-absolute-file-paths as the source for uploads, or as the target for downloads. These paths would typically be of the form:.