SQS: perform validation on all messages before attempting a send (#6722)

moto/sqs/models.py

@@ -101,7 +101,6 @@ class Message(BaseModel):
 
     @property
     def attribute_md5(self) -> str:
-
         md5 = md5_hash()
 
         for attrName in sorted(self.message_attributes.keys()):
@@ -552,7 +551,6 @@ class Queue(CloudFormationModel):
 
     def add_message(self, message: Message) -> None:
         if self.fifo_queue:
-
             # the cases in which we dedupe fifo messages
             # from https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/using-messagededuplicationid-property.html
             # https://docs.aws.amazon.com/AWSSimpleQueueService/latest/APIReference/API_SendMessage.html
@@ -786,19 +784,13 @@ class SQSBackend(BaseBackend):
         queue._set_attributes(attributes)
         return queue
 
-    def send_message(
+    def _validate_message(
         self,
-        queue_name: str,
+        queue: Queue,
         message_body: str,
-        message_attributes: Optional[Dict[str, Any]] = None,
-        delay_seconds: Optional[int] = None,
         deduplication_id: Optional[str] = None,
         group_id: Optional[str] = None,
-        system_attributes: Optional[Dict[str, Any]] = None,
-    ) -> Message:
-
-        queue = self.get_queue(queue_name)
-
+    ) -> None:
         if queue.fifo_queue:
             if (
                 queue.attributes.get("ContentBasedDeduplication") == "false"
@@ -822,6 +814,33 @@ class SQSBackend(BaseBackend):
             msg = f"One or more parameters are invalid. Reason: Message must be shorter than {queue.maximum_message_size} bytes."  # type: ignore
             raise InvalidParameterValue(msg)
 
+        if group_id is None:
+            if queue.fifo_queue:
+                # MessageGroupId is a mandatory parameter for all
+                # messages in a fifo queue
+                raise MissingParameter("MessageGroupId")
+        else:
+            if not queue.fifo_queue:
+                msg = (
+                    f"Value {group_id} for parameter MessageGroupId is invalid. "
+                    "Reason: The request include parameter that is not valid for this queue type."
+                )
+                raise InvalidParameterValue(msg)
+
+    def send_message(
+        self,
+        queue_name: str,
+        message_body: str,
+        message_attributes: Optional[Dict[str, Any]] = None,
+        delay_seconds: Optional[int] = None,
+        deduplication_id: Optional[str] = None,
+        group_id: Optional[str] = None,
+        system_attributes: Optional[Dict[str, Any]] = None,
+    ) -> Message:
+        queue = self.get_queue(queue_name)
+
+        self._validate_message(queue, message_body, deduplication_id, group_id)
+
         if delay_seconds:
             delay_seconds = int(delay_seconds)
         else:
@@ -844,18 +863,7 @@ class SQSBackend(BaseBackend):
                 random.choice(string.digits) for _ in range(20)
             )
 
-        if group_id is None:
-            # MessageGroupId is a mandatory parameter for all
-            # messages in a fifo queue
-            if queue.fifo_queue:
-                raise MissingParameter("MessageGroupId")
-        else:
-            if not queue.fifo_queue:
-                msg = (
-                    f"Value {group_id} for parameter MessageGroupId is invalid. "
-                    "Reason: The request include parameter that is not valid for this queue type."
-                )
-                raise InvalidParameterValue(msg)
+        if group_id is not None:
             message.group_id = group_id
 
         if message_attributes:
@@ -877,7 +885,7 @@ class SQSBackend(BaseBackend):
     def send_message_batch(
         self, queue_name: str, entries: Dict[str, Dict[str, Any]]
     ) -> Tuple[List[Message], List[Dict[str, Any]]]:
-        self.get_queue(queue_name)
+        queue = self.get_queue(queue_name)
 
         if any(
             not re.match(r"^[\w-]{1,80}$", entry["Id"]) for entry in entries.values()
@@ -899,6 +907,16 @@ class SQSBackend(BaseBackend):
 
         messages = []
         failedInvalidDelay = []
+
+        for entry in entries.values():
+            # validate ALL messages before trying to send any
+            self._validate_message(
+                queue,
+                entry["MessageBody"],
+                entry.get("MessageDeduplicationId"),
+                entry.get("MessageGroupId"),
+            )
+
         for entry in entries.values():
             try:
                 # Loop through looking for messages
@@ -954,7 +972,6 @@ class SQSBackend(BaseBackend):
 
         # queue.messages only contains visible messages
         while True:
-
             if result or (wait_seconds_timeout and unix_time() > polling_end):
                 break
 
@@ -1045,7 +1062,6 @@ class SQSBackend(BaseBackend):
         queue = self.get_queue(queue_name)
         for message in queue._messages:
             if message.had_receipt_handle(receipt_handle):
-
                 visibility_timeout_msec = int(visibility_timeout) * 1000
                 given_visibility_timeout = unix_time_millis() + visibility_timeout_msec
                 if given_visibility_timeout - message.sent_timestamp > 43200 * 1000:  # type: ignore