【Azure 儲存服務】Java Storage SDK 呼叫 uploadWithResponse 程式碼示例(詢問ChatGTP得程式碼原型後人力驗證)

路邊兩盞燈發表於2023-05-08

問題描述

檢視Java Storage SDK，想找一個 uploadWithResponse 的示例程式碼，但是透過全網搜尋，結果沒有任何有幫助的程式碼。使用最近ChatGPT來尋求答案，得到非常有格式的內容：

問：java azure storage account to use uploadWithResponse

答：To use the uploadWithResponse method with the Azure Blob Storage client library for Java, follow these steps:

Add the Azure Storage Blob dependency to your project's build file. For Maven, add the following to your pom.xml:

<dependency>
  <groupId>com.azure</groupId>
  <artifactId>azure-storage-blob</artifactId>
  <version>12.14.2</version>
</dependency>

Import the necessary classes:

import com.azure.storage.blob.BlobClient;
import com.azure.storage.blob.BlobContainerClient;
import com.azure.storage.blob.BlobServiceClient;
import com.azure.storage.blob.BlobServiceClientBuilder;

Create a BlobServiceClient instance using your storage account connection string:

String connectionString = "your_connection_string";
BlobServiceClient blobServiceClient = new BlobServiceClientBuilder().connectionString(connectionString).buildClient();

Get a reference to the container and the blob you want to upload:

String containerName = "your_container_name";
String blobName = "your_blob_name";
BlobContainerClient containerClient = blobServiceClient.getBlobContainerClient(containerName);
BlobClient blobClient = containerClient.getBlobClient(blobName);

Upload a file using the uploadWithResponse method:

import com.azure.storage.blob.models.BlobUploadFromFileOptions;
import java.nio.file.Path;
import java.nio.file.Paths;

Path filePath = Paths.get("path/to/your/file");
BlobUploadFromFileOptions options = new BlobUploadFromFileOptions(filePath);
blobClient.uploadWithResponse(options, null, null);

This will upload the file to the specified blob in the Azure Blob Storage container. Remember to replace the placeholders with your actual connection string, container name, blob name, and file path.

繼續追問：BlobParallelUploadOptions with string content

答：(前面4步的答案一樣，第五步的內容為)

Convert the string content to an InputStream and set up BlobParallelUploadOptions:

String content = "your_string_content";
InputStream inputStream = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
long blockSize = 100 * 1024L; // 100 KB
int maxConcurrency = 5;
ParallelTransferOptions parallelTransferOptions = new ParallelTransferOptions(blockSize, maxConcurrency);
BlobParallelUploadOptions options = new BlobParallelUploadOptions(inputStream).setParallelTra

在繼續問：如何使用 “To avoid overwriting, pass "*" to setIfNoneMatch(String ifNoneMatch). how to use the setifnonematch”

答：(前面4步的答案一樣，第五步的內容為)

Set up BlobUploadOptions with setIfNoneMatch:

BlobUploadOptions options = new BlobUploadOptions()
    .setInputStream(inputStream)
    .setLength((long) content.length())
    .setHttpHeaders(new BlobHttpHeaders().setContentType("text/plain"))
    .setRequestConditions(new BlobRequestConditions().setIfNoneMatch("*"));

Upload the string content using the uploadWithResponse method with BlobUploadOptions:

blobClient.uploadWithResponse(options, null, null);

This will upload the string content to the specified blob in the Azure Blob Storage container only if the blob does not already exist. If the blob exists, the upload will fail with a BlobStorageException due to the setIfNoneMatch("*") condition. Remember to replace the placeholders with your actual connection string, container name, blob name, and string content.

問題解答

根據ChatGPT提供的三部分資訊，透過人力拼接和測試。得到了成功執行的uploadWithResponse程式碼：

uploadWithResponse示例程式碼

                String storageConnectionString = "DefaultEndpointsProtocol=https;AccountName=***************";
      　　　　　　String containerName = "******************";
　　　　　　      String fileName  = "******************";

                BlobServiceClient blobServiceClient = new BlobServiceClientBuilder()
                                .connectionString(storageConnectionString)
                                .buildClient();
                BlobContainerClient containerClient = blobServiceClient.createBlobContainer(containerName);
                BlobClient blobClient = containerClient.getBlobClient(fileName);

                //準備content並且初始化blob parallel upload options物件
 　             String content = "Test to append new content into exists blob! by blogs lu bian liang zhan deng ";
                InputStream inputStream = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
                BlobParallelUploadOptions options = new BlobParallelUploadOptions(inputStream, content.getBytes().length);
                options.setRequestConditions(new BlobRequestConditions().setIfNoneMatch("*"));
                Response<BlockBlobItem> rsp = blobClient.uploadWithResponse(options, null, null);

                if(rsp.getStatusCode()==201)
                {
                        System.out.println("append content successful........");                        
                }