refactor: move api/v1/utils to net/gphttp

internal/net/gphttp/body.go

@@ -0,0 +1,46 @@
+package gphttp
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/yusing/go-proxy/internal/logging"
+)
+
+func WriteBody(w http.ResponseWriter, body []byte) {
+	if _, err := w.Write(body); err != nil {
+		switch {
+		case errors.Is(err, http.ErrHandlerTimeout),
+			errors.Is(err, context.DeadlineExceeded):
+			logging.Err(err).Msg("timeout writing body")
+		default:
+			logging.Err(err).Msg("failed to write body")
+		}
+	}
+}
+
+func RespondJSON(w http.ResponseWriter, r *http.Request, data any, code ...int) (canProceed bool) {
+	if len(code) > 0 {
+		w.WriteHeader(code[0])
+	}
+	w.Header().Set("Content-Type", "application/json")
+	var err error
+
+	switch data := data.(type) {
+	case string:
+		_, err = w.Write([]byte(fmt.Sprintf("%q", data)))
+	case []byte:
+		panic("use WriteBody instead")
+	default:
+		err = json.NewEncoder(w).Encode(data)
+	}
+
+	if err != nil {
+		LogError(r).Err(err).Msg("failed to encode json")
+		return false
+	}
+	return true
+}