About HTTP Connector Migration
Key changes in the HTTP connector for Mule Runtime 4.0 and later that can affect migration are:
-
The
http:listener-configandhttp:request-confighave a new, inner connection element. -
The HTTP body option replaces the source parameter in the request and is incorporated to the Listener’s response and error response.
-
The HTTP Listener and Request components return attributes, which include all previous properties.
-
HTTP parsing has been removed. DataWeave now handles special mime types. It can be used to both read and write such payloads.
-
The
static-resource-handleris renamedload-static-resource. -
To access source HTTP Listener and HTTP Request attributes, the following DataWeave syntax replaces the Mule Expression Language (MEL) expressions for accessing past properties.
#[attributes.<parameter>]
The "HTTP Connector XML Reference" maps Mule 3.x MEL expressions to Mule 4.0 DataWeave expressions.
The following constructs are removed in Mule Runtime 4.0:
-
Request and response builders,
http:request-builderandhttp:response-builder -
Worker threading profile
The request, response, and error-response replace the builders. Using DataWeave expressions eliminates the need for building parameters.