/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.fs.azure;
import static org.apache.hadoop.fs.azure.AzureNativeFileSystemStore.KEY_CHECK_BLOCK_MD5;
import static org.apache.hadoop.fs.azure.AzureNativeFileSystemStore.KEY_STORE_BLOB_MD5;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.junit.Assume.assumeNotNull;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.util.Arrays;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.azure.AzureNativeFileSystemStore.TestHookOperationContext;
import org.junit.After;
import org.junit.Test;
import com.microsoft.azure.storage.Constants;
import com.microsoft.azure.storage.OperationContext;
import com.microsoft.azure.storage.ResponseReceivedEvent;
import com.microsoft.azure.storage.StorageErrorCodeStrings;
import com.microsoft.azure.storage.StorageEvent;
import com.microsoft.azure.storage.StorageException;
import com.microsoft.azure.storage.blob.BlockEntry;
import com.microsoft.azure.storage.blob.BlockSearchMode;
import com.microsoft.azure.storage.blob.CloudBlockBlob;
import com.microsoft.azure.storage.core.Base64;
/**
* Test that we do proper data integrity validation with MD5 checks as
* configured.
*/
public class TestBlobDataValidation {
private AzureBlobStorageTestAccount testAccount;
@After
public void tearDown() throws Exception {
if (testAccount != null) {
testAccount.cleanup();
testAccount = null;
}
}
/**
* Test that by default we don't store the blob-level MD5.
*/
@Test
public void testBlobMd5StoreOffByDefault() throws Exception {
testAccount = AzureBlobStorageTestAccount.create();
testStoreBlobMd5(false);
}
/**
* Test that we get blob-level MD5 storage and validation if we specify that
* in the configuration.
*/
@Test
public void testStoreBlobMd5() throws Exception {
Configuration conf = new Configuration();
conf.setBoolean(KEY_STORE_BLOB_MD5, true);
testAccount = AzureBlobStorageTestAccount.create(conf);
testStoreBlobMd5(true);
}
private void testStoreBlobMd5(boolean expectMd5Stored) throws Exception {
assumeNotNull(testAccount);
// Write a test file.
String testFileKey = "testFile";
Path testFilePath = new Path("/" + testFileKey);
OutputStream outStream = testAccount.getFileSystem().create(testFilePath);
outStream.write(new byte[] { 5, 15 });
outStream.close();
// Check that we stored/didn't store the MD5 field as configured.
CloudBlockBlob blob = testAccount.getBlobReference(testFileKey);
blob.downloadAttributes();
String obtainedMd5 = blob.getProperties().getContentMD5();
if (expectMd5Stored) {
assertNotNull(obtainedMd5);
} else {
assertNull("Expected no MD5, found: " + obtainedMd5, obtainedMd5);
}
// Mess with the content so it doesn't match the MD5.
String newBlockId = Base64.encode(new byte[] { 55, 44, 33, 22 });
blob.uploadBlock(newBlockId,
new ByteArrayInputStream(new byte[] { 6, 45 }), 2);
blob.commitBlockList(Arrays.asList(new BlockEntry[] { new BlockEntry(
newBlockId, BlockSearchMode.UNCOMMITTED) }));
// Now read back the content. If we stored the MD5 for the blob content
// we should get a data corruption error.
InputStream inStream = testAccount.getFileSystem().open(testFilePath);
try {
byte[] inBuf = new byte[100];
while (inStream.read(inBuf) > 0){
//nothing;
}
inStream.close();
if (expectMd5Stored) {
fail("Should've thrown because of data corruption.");
}
} catch (IOException ex) {
if (!expectMd5Stored) {
throw ex;
}
StorageException cause = (StorageException)ex.getCause();
assertNotNull(cause);
assertTrue("Unexpected cause: " + cause,
cause.getErrorCode().equals(StorageErrorCodeStrings.INVALID_MD5));
}
}
/**
* Test that by default we check block-level MD5.
*/
@Test
public void testCheckBlockMd5() throws Exception {
testAccount = AzureBlobStorageTestAccount.create();
testCheckBlockMd5(true);
}
/**
* Test that we don't check block-level MD5 if we specify that in the
* configuration.
*/
@Test
public void testDontCheckBlockMd5() throws Exception {
Configuration conf = new Configuration();
conf.setBoolean(KEY_CHECK_BLOCK_MD5, false);
testAccount = AzureBlobStorageTestAccount.create(conf);
testCheckBlockMd5(false);
}
/**
* Connection inspector to check that MD5 fields for content is set/not set as
* expected.
*/
private static class ContentMD5Checker extends
StorageEvent<ResponseReceivedEvent> {
private final boolean expectMd5;
public ContentMD5Checker(boolean expectMd5) {
this.expectMd5 = expectMd5;
}
@Override
public void eventOccurred(ResponseReceivedEvent eventArg) {
HttpURLConnection connection = (HttpURLConnection) eventArg
.getConnectionObject();
if (isGetRange(connection)) {
checkObtainedMd5(connection
.getHeaderField(Constants.HeaderConstants.CONTENT_MD5));
} else if (isPutBlock(connection)) {
checkObtainedMd5(connection
.getRequestProperty(Constants.HeaderConstants.CONTENT_MD5));
}
}
private void checkObtainedMd5(String obtainedMd5) {
if (expectMd5) {
assertNotNull(obtainedMd5);
} else {
assertNull("Expected no MD5, found: " + obtainedMd5, obtainedMd5);
}
}
private static boolean isPutBlock(HttpURLConnection connection) {
return connection.getRequestMethod().equals("PUT")
&& connection.getURL().getQuery() != null
&& connection.getURL().getQuery().contains("blockid");
}
private static boolean isGetRange(HttpURLConnection connection) {
return connection.getRequestMethod().equals("GET")
&& connection
.getHeaderField(Constants.HeaderConstants.STORAGE_RANGE_HEADER) != null;
}
}
private void testCheckBlockMd5(final boolean expectMd5Checked)
throws Exception {
assumeNotNull(testAccount);
Path testFilePath = new Path("/testFile");
// Add a hook to check that for GET/PUT requests we set/don't set
// the block-level MD5 field as configured. I tried to do clever
// testing by also messing with the raw data to see if we actually
// validate the data as expected, but the HttpURLConnection wasn't
// pluggable enough for me to do that.
testAccount.getFileSystem().getStore()
.addTestHookToOperationContext(new TestHookOperationContext() {
@Override
public OperationContext modifyOperationContext(
OperationContext original) {
original.getResponseReceivedEventHandler().addListener(
new ContentMD5Checker(expectMd5Checked));
return original;
}
});
OutputStream outStream = testAccount.getFileSystem().create(testFilePath);
outStream.write(new byte[] { 5, 15 });
outStream.close();
InputStream inStream = testAccount.getFileSystem().open(testFilePath);
byte[] inBuf = new byte[100];
while (inStream.read(inBuf) > 0){
//nothing;
}
inStream.close();
}
}