How to add placeholder value in upstream path to header in downstream path?

[S-sona]

I need to take a part of the route like api/service/{headerval1}/{headerval2} and create a header value that gets passed to the downstream services. Values in headerval1 and headerval2 should get passed as headers in downstream service

I have given below route

{
      "DownstreamPathTemplate": "/shopping/payment/verify/",
      "DownstreamScheme": "http",
      "UpstreamPathTemplate": "/shopping/payment/verify/{headerval1}/{headerval2}",
      "UpstreamHttpMethod": [ "POST", "Options" ],
      "ServiceName": "shopping",
      "SwaggerKey": "shopping",
      "DelegatingHandlers": [
        "PathToHeaderDelegatingHandler"
      ]
},

Can someone help me with the delegating handler?

[S-sona]

can anyone help me with this issue ?

[raman-m]

Oh, my dear!...
I will help you! 😉

[raman-m]

Dear Author,

You need to use a combination of 3 features

• Headers Transformation
• Placeholders
• Delegating Handlers

Currently Ocelot doesn't transform from placeholder to a header except limited number of system placeholders.
We can discuss this functionality, and consider it as a feature... Will you contribute with a PR?

But we believe that writing custom delegating handler to convert URL path parts into a headers should be pretty easy for you.