You can communicate information about the request and the response through header fields in the HTTP response. Integration Server will generate some header fields, such as Set-Cookie, WWW-Authenticate, Content-Type, Content-Length, and Connection. You can use the pub.flow:setResponseHeader to set Content-Type and other header fields. You can also set the header fields of an HTTP request by adding a variable named $httpResponse that references the pub.flow:httpResponse document type to the flow service pipeline. For more information on this document type, see webMethods Integration Server Built-In Services Reference.

HTTP/1.1 defines the header fields that can appear in a response in three sections of RFC 2616: 4.5, 6.2, and 7.1. Examine these codes to determine which are appropriate for your application.