http 핸들러 추가

server/http_handler.go

@@ -0,0 +1,87 @@
+package server
+
+import (
+	"go-ayo/common"
+	"go-ayo/logger"
+	"io"
+	"net/http"
+	"reflect"
+	"runtime/debug"
+	"strings"
+)
+
+const (
+	defaultMaxMemory = 32 << 10 // 32 KB
+)
+
+type HoustonServerWithHandler interface {
+	HoustonServer
+	RegisterHandlers(serveMux *http.ServeMux, prefix string) error
+}
+
+type houstonHandler struct {
+	HoustonServer
+	methods map[string]reflect.Method
+}
+
+func NewHoustonHandler() HoustonServerWithHandler {
+	var tmp *houstonHandler
+
+	methods := make(map[string]reflect.Method)
+	tp := reflect.TypeOf(tmp)
+	for i := 0; i < tp.NumMethod(); i++ {
+		method := tp.Method(i)
+		methods[strings.ToLower(method.Name)] = method
+	}
+	return &houstonHandler{
+		HoustonServer: NewServer(),
+		methods:       methods,
+	}
+}
+
+func (h *houstonHandler) RegisterHandlers(serveMux *http.ServeMux, prefix string) error {
+	serveMux.Handle(common.MakeHttpHandlerPattern(prefix, "houston"), h)
+
+	return nil
+}
+
+func (h *houstonHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	defer func() {
+		s := recover()
+		if s != nil {
+			logger.Println(s)
+			debug.PrintStack()
+		}
+	}()
+
+	defer func() {
+		io.Copy(io.Discard, r.Body)
+		r.Body.Close()
+	}()
+
+	operation := r.FormValue("operation")
+	if len(operation) == 0 {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	method, ok := h.methods[strings.ToLower(operation)]
+	if !ok {
+		// 없는 operation
+		logger.Println("fail to call api. operation is not valid :", operation)
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	if r.PostForm == nil {
+		r.ParseMultipartForm(defaultMaxMemory)
+	}
+
+	args := []reflect.Value{
+		reflect.ValueOf(h),
+		reflect.ValueOf(w),
+		reflect.ValueOf(r),
+	}
+
+	method.Func.Call(args)
+}