func (l *HttpLocation) copyRequest(req *http.Request, body netutils.MultiReader, endpoint endpoint.Endpoint) *http.Request {
outReq := new(http.Request)
*outReq = *req // includes shallow copies of maps, but we handle this below
// Set the body to the enhanced body that can be re-read multiple times and buffered to disk
outReq.Body = body
endpointURL := endpoint.GetUrl()
outReq.URL.Scheme = endpointURL.Scheme
outReq.URL.Host = endpointURL.Host
// workaround for https://github.com/golang/go/issues/10433
outReq.URL.Opaque = mergeStartingSlashes(req.RequestURI)
// raw query is already included in RequestURI, so ignore it to avoid dupes
outReq.URL.RawQuery = ""
outReq.Proto = "HTTP/1.1"
outReq.ProtoMajor = 1
outReq.ProtoMinor = 1
// Overwrite close flag so we can keep persistent connection for the backend servers
outReq.Close = false
outReq.Header = make(http.Header)
netutils.CopyHeaders(outReq.Header, req.Header)
return outReq
}
func (r *RoundRobin) RemoveEndpoint(endpoint endpoint.Endpoint) error {
r.mutex.Lock()
defer r.mutex.Unlock()
e, index := r.findEndpointByUrl(endpoint.GetUrl())
if e == nil {
return fmt.Errorf("Endpoint not found")
}
r.endpoints = append(r.endpoints[:index], r.endpoints[index+1:]...)
r.resetState()
return nil
}
// In case if endpoint is already present in the load balancer, returns error
func (r *RoundRobin) AddEndpointWithOptions(endpoint endpoint.Endpoint, options EndpointOptions) error {
r.mutex.Lock()
defer r.mutex.Unlock()
if endpoint == nil {
return fmt.Errorf("Endpoint can't be nil")
}
if e, _ := r.findEndpointByUrl(endpoint.GetUrl()); e != nil {
return fmt.Errorf("Endpoint already exists")
}
we, err := r.newWeightedEndpoint(endpoint, options)
if err != nil {
return err
}
r.endpoints = append(r.endpoints, we)
r.resetState()
return nil
}