PHPLIB-319: Added 'disableMD5' option as GridFS MD5 digest must be optional

docs/includes/apiargs-MongoDBDatabase-method-selectGridFSBucket-option.yaml

@@ -17,6 +17,17 @@ interface: phpmethod
 operation: ~
 optional: true
 ---
+arg_name: option
+name: disableMD5
+type: boolean
+description: |
+  Whether to disable automatic MD5 generation when storing files.
+
+  Defaults to ``false``.
+interface: phpmethod
+operation: ~
+optional: true
+---
 source:
   file: apiargs-common-option.yaml
   ref: readConcern

docs/includes/apiargs-MongoDBGridFSBucket-common-option.yaml

@@ -18,6 +18,17 @@ operation: ~
 optional: true
 ---
 arg_name: option
+name: disableMD5
+type: boolean
+description: |
+  Whether to disable automatic MD5 generation when storing files.
+
+  Defaults to ``false``.
+interface: phpmethod
+operation: ~
+optional: true
+---
+arg_name: option
 name: metadata
 type: array|object
 description: |

docs/includes/apiargs-MongoDBGridFSBucket-method-construct-option.yaml

@@ -17,6 +17,17 @@ interface: phpmethod
 operation: ~
 optional: true
 ---
+arg_name: option
+name: disableMD5
+type: boolean
+description: |
+  Whether to disable automatic MD5 generation when storing files.
+
+  Defaults to ``false``.
+interface: phpmethod
+operation: ~
+optional: true
+---
 source:
   file: apiargs-common-option.yaml
   ref: readConcern

docs/includes/apiargs-MongoDBGridFSBucket-method-openUploadStream-option.yaml

@@ -6,6 +6,10 @@ source:
   file: apiargs-MongoDBGridFSBucket-common-option.yaml
   ref: chunkSizeBytes
 ---
+source:
+  file: apiargs-MongoDBGridFSBucket-common-option.yaml
+  ref: disableMD5
+---
 source:
   file: apiargs-MongoDBGridFSBucket-common-option.yaml
   ref: metadata

docs/includes/apiargs-MongoDBGridFSBucket-method-uploadFromStream-option.yaml

@@ -6,6 +6,10 @@ source:
   file: apiargs-MongoDBGridFSBucket-common-option.yaml
   ref: chunkSizeBytes
 ---
+source:
+  file: apiargs-MongoDBGridFSBucket-common-option.yaml
+  ref: disableMD5
+---
 source:
   file: apiargs-MongoDBGridFSBucket-common-option.yaml
   ref: metadata

src/GridFS/Bucket.php

@@ -51,6 +51,7 @@ class Bucket
     private $databaseName;
     private $manager;
     private $bucketName;
+    private $disableMD5;
     private $chunkSizeBytes;
     private $readConcern;
     private $readPreference;
@@ -68,6 +69,9 @@ class Bucket
      *  * chunkSizeBytes (integer): The chunk size in bytes. Defaults to
      *    261120 (i.e. 255 KiB).
      *
+     *  * disableMD5 (boolean): When true, no MD5 sum will be generated for
+     *    each stored file. Defaults to "false".
+     *
      *  * readConcern (MongoDB\Driver\ReadConcern): Read concern.
      *
      *  * readPreference (MongoDB\Driver\ReadPreference): Read preference.
@@ -100,6 +104,10 @@ class Bucket
             throw new InvalidArgumentException(sprintf('Expected "chunkSizeBytes" option to be >= 1, %d given', $options['chunkSizeBytes']));
         }
 
+        if (isset($options['disableMD5']) && ! is_bool($options['disableMD5'])) {
+            throw InvalidArgumentException::invalidType('"disableMD5" option', $options['disableMD5'], 'boolean');
+        }
+
         if (isset($options['readConcern']) && ! $options['readConcern'] instanceof ReadConcern) {
             throw InvalidArgumentException::invalidType('"readConcern" option', $options['readConcern'], 'MongoDB\Driver\ReadConcern');
         }
@@ -120,6 +128,7 @@ class Bucket
         $this->databaseName = (string) $databaseName;
         $this->bucketName = $options['bucketName'];
         $this->chunkSizeBytes = $options['chunkSizeBytes'];
+        $this->disableMD5 = isset($options['disableMD5']) ? $options['disableMD5'] : false;
         $this->readConcern = isset($options['readConcern']) ? $options['readConcern'] : $this->manager->getReadConcern();
         $this->readPreference = isset($options['readPreference']) ? $options['readPreference'] : $this->manager->getReadPreference();
         $this->typeMap = isset($options['typeMap']) ? $options['typeMap'] : self::$defaultTypeMap;
@@ -470,6 +479,9 @@ class Bucket
      *  * chunkSizeBytes (integer): The chunk size in bytes. Defaults to the
      *    bucket's chunk size.
      *
+     *  * disableMD5 (boolean): When true, no MD5 sum will be generated for
+     *    the stored file. Defaults to "false".
+     *
      *  * metadata (document): User data for the "metadata" field of the files
      *    collection document.
      *

src/GridFS/WritableStream.php

@@ -36,9 +36,10 @@ class WritableStream
     private $buffer = '';
     private $chunkOffset = 0;
     private $chunkSize;
+    private $disableMD5;
     private $collectionWrapper;
-    private $ctx;
     private $file;
+    private $hashCtx;
     private $isClosed = false;
     private $length = 0;
 
@@ -56,6 +57,9 @@ class WritableStream
      *  * chunkSizeBytes (integer): The chunk size in bytes. Defaults to
      *    261120 (i.e. 255 KiB).
      *
+     *  * disableMD5 (boolean): When true, no MD5 sum will be generated.
+     *    Defaults to "false".
+     *
      *  * contentType (string): DEPRECATED content type to be stored with the
      *    file. This information should now be added to the metadata.
      *
@@ -86,6 +90,10 @@ class WritableStream
             throw new InvalidArgumentException(sprintf('Expected "chunkSizeBytes" option to be >= 1, %d given', $options['chunkSizeBytes']));
         }
 
+        if (isset($options['disableMD5']) && ! is_bool($options['disableMD5'])) {
+            throw InvalidArgumentException::invalidType('"disableMD5" option', $options['disableMD5'], 'boolean');
+        }
+
         if (isset($options['contentType']) && ! is_string($options['contentType'])) {
             throw InvalidArgumentException::invalidType('"contentType" option', $options['contentType'], 'string');
         }
@@ -96,7 +104,11 @@ class WritableStream
 
         $this->chunkSize = $options['chunkSizeBytes'];
         $this->collectionWrapper = $collectionWrapper;
-        $this->ctx = hash_init('md5');
+        $this->disableMD5 = isset($options['disableMD5']) ? $options['disableMD5'] : false;
+
+        if ( ! $this->disableMD5) {
+            $this->hashCtx = hash_init('md5');
+        }
 
         $this->file = [
             '_id' => $options['_id'],
@@ -219,12 +231,14 @@ class WritableStream
 
     private function fileCollectionInsert()
     {
-        $md5 = hash_final($this->ctx);
-
         $this->file['length'] = $this->length;
-        $this->file['md5'] = $md5;
         $this->file['uploadDate'] = new UTCDateTime;
 
+        if ( ! $this->disableMD5) {
+            $md5 = hash_final($this->hashCtx);
+            $this->file['md5'] = $md5;
+        }
+
         try {
             $this->collectionWrapper->insertFile($this->file);
         } catch (DriverRuntimeException $e) {
@@ -251,7 +265,9 @@ class WritableStream
             'data' => new Binary($data, Binary::TYPE_GENERIC),
         ];
 
-        hash_update($this->ctx, $data);
+        if ( ! $this->disableMD5) {
+            hash_update($this->hashCtx, $data);
+        }
 
         try {
             $this->collectionWrapper->insertChunk($chunk);

tests/GridFS/spec-tests/upload.json

@@ -382,6 +382,85 @@
           }
         ]
       }
+    },
+    {
+      "description": "Upload when length is 0 sans MD5",
+      "act": {
+        "operation": "upload",
+        "arguments": {
+          "filename": "filename",
+          "source": {
+            "$hex": ""
+          },
+          "options": {
+            "chunkSizeBytes": 4,
+            "disableMD5": true
+          }
+        }
+      },
+      "assert": {
+        "result": "&result",
+        "data": [
+          {
+            "insert": "expected.files",
+            "documents": [
+              {
+                "_id": "*result",
+                "length": 0,
+                "chunkSize": 4,
+                "uploadDate": "*actual",
+                "filename": "filename"
+              }
+            ]
+          }
+        ]
+      }
+    },
+    {
+      "description": "Upload when length is 1 sans MD5",
+      "act": {
+        "operation": "upload",
+        "arguments": {
+          "filename": "filename",
+          "source": {
+            "$hex": "11"
+          },
+          "options": {
+            "chunkSizeBytes": 4,
+            "disableMD5": true
+          }
+        }
+      },
+      "assert": {
+        "result": "&result",
+        "data": [
+          {
+            "insert": "expected.files",
+            "documents": [
+              {
+                "_id": "*result",
+                "length": 1,
+                "chunkSize": 4,
+                "uploadDate": "*actual",
+                "filename": "filename"
+              }
+            ]
+          },
+          {
+            "insert": "expected.chunks",
+            "documents": [
+              {
+                "_id": "*actual",
+                "files_id": "*result",
+                "n": 0,
+                "data": {
+                  "$hex": "11"
+                }
+              }
+            ]
+          }
+        ]
+      }
     }
   ]
 }