/
http.go
84 lines (66 loc) · 2.04 KB
/
http.go
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package transport
import (
"context"
"encoding/json"
"errors"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/transport"
kithttp "github.com/go-kit/kit/transport/http"
"github.com/gorilla/mux"
"github.com/longjoy/micro-go-course/section13/register/endpoint"
"net/http"
"os"
)
var (
ErrorBadRequest = errors.New("invalid request parameter")
)
// MakeHttpHandler make http handler use mux
func MakeHttpHandler(ctx context.Context, endpoints *endpoint.RegisterEndpoints) http.Handler {
r := mux.NewRouter()
kitLog := log.NewLogfmtLogger(os.Stderr)
kitLog = log.With(kitLog, "ts", log.DefaultTimestampUTC)
kitLog = log.With(kitLog, "caller", log.DefaultCaller)
options := []kithttp.ServerOption{
kithttp.ServerErrorHandler(transport.NewLogErrorHandler(kitLog)),
kithttp.ServerErrorEncoder(encodeError),
}
r.Methods("GET").Path("/health").Handler(kithttp.NewServer(
endpoints.HealthCheckEndpoint,
decodeHealthCheckRequest,
encodeJSONResponse,
options...,
))
r.Methods("GET").Path("/discovery/name").Handler(kithttp.NewServer(
endpoints.DiscoveryEndpoint,
decodeDiscoveryRequest,
encodeJSONResponse,
options...,
))
return r
}
func decodeDiscoveryRequest(ctx context.Context, r *http.Request) (interface{}, error) {
serviceName := r.URL.Query().Get("serviceName")
if serviceName == ""{
return nil, ErrorBadRequest
}
return endpoint.DiscoveryRequest{
ServiceName:serviceName,
}, nil
}
func decodeHealthCheckRequest(ctx context.Context, r *http.Request) (interface{}, error) {
return endpoint.HealthRequest{}, nil
}
func encodeJSONResponse(ctx context.Context, w http.ResponseWriter, response interface{}) error {
w.Header().Set("Content-Type", "application/json;charset=utf-8")
return json.NewEncoder(w).Encode(response)
}
func encodeError(_ context.Context, err error, w http.ResponseWriter) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
switch err {
default:
w.WriteHeader(http.StatusInternalServerError)
}
json.NewEncoder(w).Encode(map[string]interface{}{
"error": err.Error(),
})
}