/
str.go
89 lines (72 loc) · 2.19 KB
/
str.go
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package transports
import (
"context"
"encoding/json"
"errors"
"net/http"
"github.com/go-kit/kit/log"
"github.com/baxiang/soldiers-sortie/zipkin-go/endpoint"
"github.com/go-kit/kit/tracing/zipkin"
kithttp "github.com/go-kit/kit/transport/http"
gozipkin "github.com/openzipkin/zipkin-go"
"github.com/gorilla/mux"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
var (
ErrorBadRequest = errors.New("invalid request parameter")
)
// MakeHttpHandler make http handler use mux
func MakeHttpHandler(ctx context.Context, endpoints endpoint.StringEndpoints, zipkinTracer *gozipkin.Tracer, logger log.Logger) http.Handler {
r := mux.NewRouter()
zipkinServer := zipkin.HTTPServerTrace(zipkinTracer, zipkin.Name("http-transport"))
options := []kithttp.ServerOption{
kithttp.ServerErrorLogger(logger),
kithttp.ServerErrorEncoder(kithttp.DefaultErrorEncoder),
zipkinServer,
}
r.Methods("POST").Path("/op/{type}/{a}/{b}").Handler(kithttp.NewServer(
endpoints.StringEndpoint,
decodeStringRequest,
encodeStringResponse,
options...,
))
r.Path("/metrics").Handler(promhttp.Handler())
// create health check handler
r.Methods("GET").Path("/health").Handler(kithttp.NewServer(
endpoints.HealthCheckEndpoint,
decodeHealthCheckRequest,
encodeStringResponse,
options...,
))
return r
}
// decodeStringRequest decode request params to struct
func decodeStringRequest(_ context.Context, r *http.Request) (interface{}, error) {
vars := mux.Vars(r)
requestType, ok := vars["type"]
if !ok {
return nil, ErrorBadRequest
}
pa, ok := vars["a"]
if !ok {
return nil, ErrorBadRequest
}
pb, ok := vars["b"]
if !ok {
return nil, ErrorBadRequest
}
return endpoint.StringRequest{
RequestType: requestType,
A: pa,
B: pb,
}, nil
}
// encodeStringResponse encode response to return
func encodeStringResponse(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)
}
// decodeHealthCheckRequest decode request
func decodeHealthCheckRequest(ctx context.Context, r *http.Request) (interface{}, error) {
return endpoint.HealthRequest{}, nil
}