Android Breakpoint Upload: Implementation Guide

1 year ago
Emily Johnson
2 minutes

There are two ways to achieve breakpoint upload in Android:

  1. Range requests using HttpClient or OkHttp: When uploading a file, include the Range field in the request header to specify the starting position of the file, and send the request to the server. Upon receiving the request, the server will continue writing the file from the specified position, achieving the effect of resumable upload. This method requires server support for resumable uploads.

Example code (using OkHttp):

OkHttpClient client = new OkHttpClient();

File file = new File("path/to/file");
long fileSize = file.length();

Request request = new Request.Builder()
    .url("http://example.com/upload")
    .addHeader("Content-Range", "bytes " + uploadedBytes + "-" + (fileSize - 1) + "/" + fileSize)
    .post(RequestBody.create(MediaType.parse("application/octet-stream"), file))
    .build();

Response response = client.newCall(request).execute();
  1. Utilizing FTP or SFTP protocols: Implementing breakpoint upload through FTP or SFTP protocols. This approach requires incorporating the appropriate FTP or SFTP library in the Android application to connect to the server and enable the functionality of resuming uploads from breakpoints.

Example code (implementing FTP breakpoint upload using Apache Commons Net library):

FTPClient ftpClient = new FTPClient();
ftpClient.connect("ftp.example.com");
ftpClient.login("username", "password");

File file = new File("path/to/file");
long uploadedBytes = ftpClient.mlistFile("remote/file").getSize();
ftpClient.setRestartOffset(uploadedBytes);

InputStream inputStream = new FileInputStream(file);
ftpClient.storeFile("remote/file", inputStream);
inputStream.close();

ftpClient.logout();
ftpClient.disconnect();

It is important to note that the breakpoint upload feature requires server support for resuming uploads, as well as the necessary permissions and configuration.

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