The function returns the number of bytes copied. If the value of the variable i is -1, then it indicates that the contents of the file are over 2GB. When the returned value is -1, you can use the function copyLarge inputStream, fileOS in place of the copy inputstream, fileOS function to handle this load. Both of these functions buffer the inputstream internally. The internal buffer means we do not have to use the BufferedInputStream class to enhance our code performance and helps us avoid writing boilerplate code.
Another library managed by the Apache organization is the HttpComponents package. This library uses the request-response mechanism to download the file from a given URL. The first step to downloading a file is to create an HTTP client object that would issue the request to the server. For this, we will be using the CloseableHttpClient class.
The code snippet that creates a new HTTP client is as follows:. We then need to create an HttpGet or HttpPost object to send the request to the server. The request is created by the following line of code:. The execute request function is applied to the client object and returns with a response from the server. Once the request is sent to the server we need a response object to receive the data sent from the server.
To catch the response from the server we use the HttpResponse class object. The data sent by the server in the form of a message is obtained through the getEntity function.
You can also obtain the response code sent by the server through the response object and use it to your specific need. The data to be downloaded is encapsulated within the entity object and can be extracted using the getContent function. The getContent function returns an InputStream object that can be further used with a BufferedInputStreamReader to enhance performance.
Now all you need to do is read from the stream byte by byte and write the contents into a file using the FileOutputStream class. The last thing required to be done is closing all the open resources in order to ensure that the system resources are not overutilized and that there are no memory leaks. So there you have it - these are the simplest ways to download a file using the basic Java code and other third party libraries.
Now that we are done with the basics, you can be as creative as you want and utilize the knowledge to suit your needs.
Backup and Sync app seamlessly replicates the folders on your computer to your Google Drive, and vice versa. The method's problem is that the folders that you sync with the Backup and Sync app stay offline on the device. Meaning, it will consume the storage on your PC or Mac. Drive File Stream aims to tackle the issue. Drive File Stream does things differently by letting you access your computer's file browser instead of locally downloading your content.
In a way, it functions like a NAS, partially if not completely. Drive Stream used to be limited to only G Suite accounts.
Google wants to extend these features to regular Drive accounts as well. Follow the steps to set up Drive File Stream. Let me warn you with some of the disadvantages of using Drive File Stream. You can change it to X or some other alphabetical letter from the Settings app. Tap on Settings at the upper right corner and go to Preferences. Viewed 4k times. I'm doing a project which is similar to the Download Manager. Thank you. WynixToo WynixToo 4 4 silver badges 15 15 bronze badges.
Add a comment. Active Oldest Votes. You can refer my answer to this question here It talks about partial download and resuming downloads. Hope it helps. Community Bot 1 1 1 silver badge. Hi naikus, thanks for reply. You can name the file that is "being" downloaded as "name. When your application starts, check for any ". To resume a download, get the length of the.
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