Resolving The Problem

In order to resolve this issue, one can use one of the following methods to set the HTTP content-type header with correct value:

(1) set the HTTP "content-type" header in DataPower by using the Header Tabs of the Multi-Protocol Gateway or Web Services Proxy.

For the Multi-Protocol Gateway Service:
Objects -> Service Configuration -> Multi-Protocol Gateway -> Named MPGW Service -> Header Injection Tab -> Add

Direction
front | back (front for the response flow and back for the request flow)

Header Name
Content-Type

Header Value
text/xml; charset=utf-8

For the Web Service Proxy:
Objects -> Service Configuration -> Web Service Proxy -> Named Web Service Proxy -> Header Injection Tab -> Add

Direction
front | back (front for the response flow and back for the request flow)

Header Name
Content-Type

Header Value
text/xml; charset=utf-8

(2) Use custom stylesheet to inject HTTP content type header with correct value:

For the request flow:
<dp:set-http-request-header name="'Content-Type'" value="'text/xml; charset=utf-8'"/>

For the response flow:
<dp:set-http-response-header name="'Content-Type'" value="'text/xml; charset=utf-8'"/>

(3) set the "Include charset in reponse-type" for the respective service by using

Objects -> Service Configuration -> Multi-Protocol Gateway -> Named MPGW Service -> Proxy Setting -> Include charset in reponse-type box as "on"

Objects -> Service Configuration -> Web Service Proxy -> Named Web Service Proxy -> Proxy Setting -> Include charset in reponse-type box as "on"

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