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modifyresponse.go
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/
modifyresponse.go
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package proxy
import (
"errors"
"net/http"
router_http "code.cloudfoundry.org/gorouter/common/http"
"code.cloudfoundry.org/gorouter/handlers"
)
func (p *proxy) modifyResponse(res *http.Response) error {
req := res.Request
if req == nil {
return errors.New("Response does not have an attached request")
}
if res.Header.Get(handlers.VcapRequestIdHeader) == "" {
vcapID := req.Header.Get(handlers.VcapRequestIdHeader)
res.Header.Set(handlers.VcapRequestIdHeader, vcapID)
}
reqInfo, err := handlers.ContextRequestInfo(req)
if err != nil {
return err
}
endpoint := reqInfo.RouteEndpoint
if endpoint == nil {
return errors.New("reqInfo.RouteEndpoint is empty on a successful response")
}
routePool := reqInfo.RoutePool
if routePool == nil {
return errors.New("reqInfo.RoutePool is empty on a successful response")
}
if p.config.TraceKey != "" && req.Header.Get(router_http.VcapTraceHeader) == p.config.TraceKey {
res.Header.Set(router_http.VcapRouterHeader, p.config.Ip)
res.Header.Set(router_http.VcapBackendHeader, endpoint.CanonicalAddr())
res.Header.Set(router_http.CfRouteEndpointHeader, endpoint.CanonicalAddr())
}
return nil
}