Fixed a bug that Utilities::allZero() will return true for non-zero data chunks.

Author: XiaoningLiu

ChangeLog.md

@@ -11,6 +11,7 @@ All
 * Moved method `SharedAccessSignatureHelper::generateFileServiceSharedAccessSignatureToken()` into `FileSharedAccessSignatureHelper`.
 * `CommonMiddleWare` constructor requires storage service version as parameter now.
 * `AccessPolicy` class is now an abstract class, added children classes `BlobAccessPolicy`, `ContainerAccessPolicy`, `TableAccessPolicy`, `QueueAccessPolicy`, `FileAccessPolicy` and `ShareAccessPolicy`.
+* Fixed a bug that `Utilities::allZero()` will return true for non-zero data chunks.
 * Deprecated PHP 5.5 support.
 
 Blob

azure-storage-common/ChangeLog.md

@@ -7,4 +7,5 @@
 * Moved method `SharedAccessSignatureHelper::generateFileServiceSharedAccessSignatureToken()` into `FileSharedAccessSignatureHelper`.
 * `CommonMiddleWare` constructor requires storage service version as parameter now.
 * `AccessPolicy` class is now an abstract class, added children classes `BlobAccessPolicy`, `ContainerAccessPolicy`, `TableAccessPolicy`, `QueueAccessPolicy`, `FileAccessPolicy` and `ShareAccessPolicy`.
+* Fixed a bug that `Utilities::allZero()` will return true for non-zero data chunks.
 * Deprecated PHP 5.5 support.

azure-storage-common/src/Common/Internal/Utilities.php

@@ -783,15 +783,17 @@ public static function appendToFile($path, $content)
 
     /**
      * Check if all the bytes are zero.
+     *
      * @param string $content The content.
+     * @return bool
      */
     public static function allZero($content)
     {
         $size = strlen($content);
 
         // If all Zero, skip this range
         for ($i = 0; $i < $size; $i++) {
-            if (ord($content[$i] != 0)) {
+            if (ord($content[$i]) != 0) {
                 return false;
             }
         }

samples/BlobSamples.php

@@ -26,6 +26,7 @@
 
 use MicrosoftAzure\Storage\Blob\BlobRestProxy;
 use MicrosoftAzure\Storage\Blob\BlobSharedAccessSignatureHelper;
+use MicrosoftAzure\Storage\Blob\Models\CreateBlockBlobOptions;
 use MicrosoftAzure\Storage\Blob\Models\CreateContainerOptions;
 use MicrosoftAzure\Storage\Blob\Models\PublicAccessType;
 use MicrosoftAzure\Storage\Blob\Models\DeleteBlobOptions;
@@ -370,7 +371,7 @@ function generateBlobDownloadLinkWithSAS()
         Resources::RESOURCE_TYPE_BLOB,
         'mycontainer/myblob',
         'r',                            // Read
-        '2018-01-01T08:30:00Z'//,       // A valid ISO 8601 format expiry time
+        '2019-01-01T08:30:00Z'//,       // A valid ISO 8601 format expiry time
         //'2016-01-01T08:30:00Z',       // A valid ISO 8601 format expiry time
         //'0.0.0.0-255.255.255.255'
         //'https,http'
@@ -610,7 +611,7 @@ function leaseOperations($blobClient)
     $blob = 'Blob' . generateRandomString();
     echo "Create blob " . $blob . PHP_EOL;
     $contentType = 'text/plain; charset=UTF-8';
-    $options = new CreateBlobOptions();
+    $options = new CreateBlockBlobOptions();
     $options->setContentType($contentType);
     $blobClient->createBlockBlob($container, $blob, 'Hello world', $options);
 

tests/Unit/Blob/BlobRestProxyTest.php

@@ -1728,7 +1728,7 @@ public function testCopyBlobIncremental()
         // Setup
         $sourceContainerName = 'copyblobincrementalsource' . $this->createSuffix();
         $sourceBlobName = 'sourceblob';
-        $sourceContentLength = 1024 * 1024 * 8;
+        $sourceContentLength = 512 * 8;
         $sourceBlobContent = openssl_random_pseudo_bytes($sourceContentLength);
 
         $destinationContainerName = 'copyblobincrementaldest' . $this->createSuffix();

tests/Unit/Common/Internal/UtilitiesTest.php

@@ -244,6 +244,19 @@ public function testSerializeAttribute()
         $this->assertEquals($expected, $actual);
     }
 
+    public function testAllZero()
+    {
+        $this->assertFalse(Utilities::allZero('hello'));
+
+        for ($i = 1; $i < 256; $i++) {
+            $this->assertFalse(Utilities::allZero(pack('c', $i)));
+        }
+
+        $this->assertTrue(Utilities::allZero(pack('c', 0)));
+
+        $this->assertTrue(Utilities::allZero(''));
+    }
+
     public function testToBoolean()
     {
         $this->assertTrue(is_bool(Utilities::toBoolean('true')));