How to check the payload type ? in MuleSoft?
Here are two common approaches to check the payload type in MuleSoft 4:
1. Using message.dataType.type:
This method directly accesses the type property of the dataType object within the message. This property indicates the data type of the payload.
Here's an example:
Maya Embedded Language
#[message.dataType.type] == 'application/json'
This expression evaluates to true if the message payload is of type JSON (assuming the content type header is set correctly).
2. Using typeOf function:
The typeOf function in DataWeave allows you to determine the type of any value.
Here's an example:
%dw 2.0
---
typeOf(message.payload) == 'string'
This expression checks if the payload type is a string. You can replace "string" with other data types like "number", "boolean", or "object" based on your requirement.
Choosing the Right Approach:
message.dataType.type: This is a simpler approach suitable for basic checks within Message Processors using MEL.
typeOf function: This method offers more flexibility within DataWeave scripts, allowing for dynamic checks and comparisons based on various data types.
Additional Considerations:
Content-Type header: While message.dataType.type relies on the message's data type, it's crucial to ensure the message's Content-Type header accurately reflects the actual payload format.
Custom MIME types: If your application deals with custom MIME types, you might need additional logic to handle them appropriately.
Here are some helpful resources for further understanding:
Message Properties: https://docs.mulesoft.com/mule-runtime/latest/intro-mule-message
DataWeave typeOf function: https://docs.mulesoft.com/dataweave/1.2/dataweave-types
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