SpringBoot可恢复文件上传tus-java-client库的使用

本文主要是介绍SpringBoot可恢复文件上传tus-java-client库的使用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1、说明

tus是一种基于HTTP的可恢复文件上传协议。可恢复意味着上传可以随时中断，并且可以恢复，而无需再次重新上传以前的数据。如果用户想要暂停，中断可能会自动发生，或者在网络问题或服务器中断的情况下意外发生。

tus-java-client是一个库，用于使用tus协议将文件上载到支持它的任何远程服务器。

该库还与Android平台兼容，使用API时无需任何修改即可使用。tus android客户端提供了额外的类，这些类可以在Java库之外使用。
源码地址: https://github.com/tus/tus-java-client

2、Maven依赖

<dependency><groupId>io.tus.java.client</groupId><artifactId>tus-java-client</artifactId><version>0.4.3</version>
</dependency>

3、示例代码

// Create a new TusClient instance
TusClient client = new TusClient();// Configure tus HTTP endpoint. This URL will be used for creating new uploads
// using the Creation extension
client.setUploadCreationURL(new URL("https://tusd.tusdemo.net/files"));// Enable resumable uploads by storing the upload URL in memory
client.enableResuming(new TusURLMemoryStore());// Open a file using which we will then create a TusUpload. If you do not have
// a File object, you can manually construct a TusUpload using an InputStream.
// See the documentation for more information.
File file = new File("./cute_kitten.png");
final TusUpload upload = new TusUpload(file);System.out.println("Starting upload...");// We wrap our uploading code in the TusExecutor class which will automatically catch
// exceptions and issue retries with small delays between them and take fully
// advantage of tus' resumability to offer more reliability.
// This step is optional but highly recommended.
TusExecutor executor = new TusExecutor() {@Overrideprotected void makeAttempt() throws ProtocolException, IOException {// First try to resume an upload. If that's not possible we will create a new// upload and get a TusUploader in return. This class is responsible for opening// a connection to the remote server and doing the uploading.TusUploader uploader = client.resumeOrCreateUpload(upload);// Alternatively, if your tus server does not support the Creation extension// and you obtained an upload URL from another service, you can instruct// tus-java-client to upload to a specific URL. Please note that this is usually// _not_ necessary and only if the tus server does not support the Creation// extension. The Vimeo API would be an example where this method is needed.// TusUploader uploader = client.beginOrResumeUploadFromURL(upload, new URL("https://tus.server.net/files/my_file"));// Upload the file in chunks of 1KB sizes.uploader.setChunkSize(1024);// Upload the file as long as data is available. Once the// file has been fully uploaded the method will return -1do {// Calculate the progress using the total size of the uploading file and// the current offset.long totalBytes = upload.getSize();long bytesUploaded = uploader.getOffset();double progress = (double) bytesUploaded / totalBytes * 100;System.out.printf("Upload at %06.2f%%.\n", progress);} while(uploader.uploadChunk() > -1);// Allow the HTTP connection to be closed and cleaned upuploader.finish();System.out.println("Upload finished.");System.out.format("Upload available at: %s", uploader.getUploadURL().toString());}
};
executor.makeAttempts();