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webMethods Knowlegebase : Custom HTTP Header policy: unable to set Host http header.

Troubleshooting


Problem

Trying to create Rest API on API Gateway that will route requests to the native service provider which expects incoming requests to have the HTTP header "Host" with a particular value.



Tried to set this outgoing HTTP header by setting the HTTP header "Host":"myvalue" in the client request headers to API Gateway, but API Gateway is not forwarding this header to the endpoint.

Tried to set Routing / Custom HTTP header policy with parameters: HTTP Header Key = Host, Header Value = "myvalue", but it neither works.

Similar behavior is present in policy Request Processing / Request Transformation with Transformation Configuration / Header Transformation.

Even tried building an IS service to be invoked in the request transformation policy to modify the Host header using pub.apigateway.ctxvar:setContextVariable, but this also has no effect on the outgoing call.

Document Location

Worldwide

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Document Information

Modified date:
20 March 2025

UID

ibm17207209

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