Read about Krakend martian: https://www.krakend.io/docs/backends/martian/
Krakend-martian provides body-modifier to replace whole body for outbound requests (for endpoint)
And you have to provide body as base64 encoded in krakend.json
eg:
Below is json configurations provided by body-modifier
{
"body.Modifier": {
"scope": ["request", "response"],
"contentType": "text/plain",
"body": "c29tZSBkYXRhIHdpdGggACBhbmQg77u/"
}
}This modifier that is written to append extra body params other than body parameter that is getting forwarded from inbound request.
{
"newjsonbody.Modifier": {
"body": "{\"origin_service\": \"my-application\", \"source\": \"mobile-app\"}",
"scope": ["request"]
}
}import (
martian "github.com/devopsfaith/krakend-martian"
_ "github.com/sathia27/martian_jsonbody"
)
martianBackendFactory := martian.NewBackendFactory(logger, krakendClient.DefaultHTTPRequestExecutor(krakendClient.NewHTTPClient))
factory := proxy.NewDefaultFactory(martianBackendFactory, logger)
routerFactory := krakendgin.NewFactory(krakendgin.Config{
Engine: engine,
ProxyFactory: factory,
Logger: logger,
RunServer: router.RunServer,
})