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http.go
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http.go
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package main
import (
"context"
"encoding/json"
"fmt"
"net"
"net/http"
"strings"
"github.com/go-chi/chi"
"github.com/go-logr/logr"
pb "github.com/hatappi/echo-server/pb"
)
func sayHelloHandler(metadata map[string]string, logger logr.Logger) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
var req pb.SayHelloRequest
switch r.Method {
case http.MethodGet:
case http.MethodHead:
q := r.URL.Query()
req.Name = q.Get("name")
case http.MethodPost:
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
default:
http.Error(w, fmt.Sprintf("%s is not allowed", r.Method), http.StatusMethodNotAllowed)
return
}
reqMeta := make(map[string]string)
for k, vals := range r.Header {
reqMeta[k] = strings.Join(vals, ",")
}
logger.Info("sayHello request received", "name", req.GetName(), "protocol", r.Proto, "path", r.URL.Path, "method", r.Method)
resp := &pb.SayHelloResponse{
Body: "Hello " + req.GetName(),
RequestMetadata: reqMeta,
ResponseMetadata: metadata,
}
if err := json.NewEncoder(w).Encode(resp); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
}
type httpServer struct {
logger logr.Logger
server *http.Server
}
func NewHTTPServer(metadata map[string]string, logger logr.Logger) *httpServer {
r := chi.NewRouter()
r.HandleFunc("/*", sayHelloHandler(metadata, logger))
server := &http.Server{
Handler: r,
}
return &httpServer{
logger: logger,
server: server,
}
}
func (hs *httpServer) Run(addr string) error {
lis, err := net.Listen("tcp", addr)
if err != nil {
return err
}
hs.logger.Info("start HTTP server", "addr", addr)
if err := hs.server.Serve(lis); err != nil && err != http.ErrServerClosed {
return err
}
return nil
}
func (hs *httpServer) Shutdown(ctx context.Context) error {
if err := hs.server.Shutdown(ctx); err != nil {
return err
}
return nil
}