[英]How to get SAS URL after file upload in azure blob privately using Java
[英]Failed file upload for Azure Blob with SAS URL
I would like to upload a file to Azure Blob using a generated SAS URL for the blob but it is failed when I executed the URL. 我收到 HTTP 错误 400 和消息
未指定此请求所必需的 HTTP header。
这是我的代码:
BlobServiceClient blobServiceClient = initBlobStorageClient();
BlobContainerClient testprovenanceContainer = getContainerClient(blobServiceClient, "testcontainer");
BlobClient blobClient = testprovenanceContainer.getBlobClient("hello.png");
OffsetDateTime expiryTime = OffsetDateTime.now().plusMinutes(5);
BlobContainerSasPermission permission = new BlobContainerSasPermission().setAddPermission(true).setWritePermission(true);
BlobServiceSasSignatureValues values = new BlobServiceSasSignatureValues(expiryTime, permission)
.setStartTime(OffsetDateTime.now());
String s = "https://testazure.blob.core.windows.net/testcontainer/hello.png?"+blobClient.generateSas(values);
uploadFileWithUrl(new File("hello.png"), new URL(a));
public static void uploadFileWithUrl(File file, URL url) throws IOException {
String contentType = Files.probeContentType(file.toPath());
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("PUT");
connection.setRequestProperty("Content-type", contentType);
connection.setRequestProperty("User-Agent", "Multi-Cloud Management 006b8507-b815-47b9-bce0-08b91981f17a");
DataOutputStream out = new DataOutputStream (connection.getOutputStream());
out.write(Files.readAllBytes(Paths.get(file.toURI())));
out.close();
// Check the HTTP response code. To complete the upload and make the object available,
// you must interact with the connection object in some way.
connection.getResponseCode();
System.out.println("HTTP response code: " + connection.getResponseCode());
connection.disconnect();
}
When we use Azure Blob rest api to upload something to Azure blob storage with sas token, We need to specify x-ms-blob-type
in request headers. 更多详细信息,请参阅文档。 现在您将图像上传到 Azure blob,我们可以使用BlockBlob
作为其值。
例如1.安装SDK
<dependency>
<groupId>com.azure</groupId>
<artifactId>azure-storage-blob</artifactId>
<version>12.6.0</version>
</dependency>
String accountName="blobstorage0516";
String accountKey ="";
StorageSharedKeyCredential creds = new StorageSharedKeyCredential(accountName,accountKey);
String endpoint = String.format(Locale.ROOT, "https://%s.blob.core.windows.net", accountName);
BlobServiceClient blobServiceClient =new BlobServiceClientBuilder()
.endpoint(endpoint)
.credential(creds)
.buildClient();
BlobContainerClient blobContainerClient =blobServiceClient.getBlobContainerClient("test");
BlobClient blobClient= blobContainerClient.getBlobClient("Hello.png");
// set sas permissions
BlobSasPermission permission = new BlobSasPermission().setCreatePermission(true).setWritePermission(true).setReadPermission(true);
BlobServiceSasSignatureValues values = new BlobServiceSasSignatureValues(OffsetDateTime.now().plusDays(1), permission)
.setStartTime(OffsetDateTime.now().minusMinutes(5));
// create sas token for the blob
String sas = blobClient.generateSas(values);
//get the blob url
String uri =blobClient.getBlobUrl() +"?" +sas;
URL url = null;
File file = new File("D:\\download\\test.png");
String contentType= null;
DataOutputStream out=null;
HttpURLConnection connection = null;
try {
contentType= Files.probeContentType(file.toPath());
url =new URL (uri);
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("PUT");
connection.setRequestProperty("Content-type", contentType);
connection.setRequestProperty("x-ms-blob-type","BlockBlob");
out = new DataOutputStream (connection.getOutputStream());
out.write(Files.readAllBytes(Paths.get(file.toURI())));
System.out.println(connection.getResponseCode());
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
out.close();
connection.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
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