move around k8s api

util/kubernetes/api/response.go

@@ -0,0 +1,92 @@
+package api
+
+import (
+	"encoding/json"
+	"errors"
+	"io/ioutil"
+	"net/http"
+)
+
+// Errors ...
+var (
+	ErrNotFound = errors.New("kubernetes: resource not found")
+	ErrDecode   = errors.New("kubernetes: error decoding")
+	ErrUnknown  = errors.New("kubernetes: unknown error")
+)
+
+// Status is an object that is returned when a request
+// failed or delete succeeded.
+// type Status struct {
+// 	Kind    string `json:"kind"`
+// 	Status  string `json:"status"`
+// 	Message string `json:"message"`
+// 	Reason  string `json:"reason"`
+// 	Code    int    `json:"code"`
+// }
+
+// Response ...
+type Response struct {
+	res *http.Response
+	err error
+
+	body []byte
+}
+
+// Error returns an error
+func (r *Response) Error() error {
+	return r.err
+}
+
+// StatusCode returns status code for response
+func (r *Response) StatusCode() int {
+	return r.res.StatusCode
+}
+
+// Into decode body into `data`
+func (r *Response) Into(data interface{}) error {
+	if r.err != nil {
+		return r.err
+	}
+
+	defer r.res.Body.Close()
+	decoder := json.NewDecoder(r.res.Body)
+	err := decoder.Decode(&data)
+	if err != nil {
+		return ErrDecode
+	}
+
+	return r.err
+}
+
+func newResponse(res *http.Response, err error) *Response {
+	r := &Response{
+		res: res,
+		err: err,
+	}
+
+	if err != nil {
+		return r
+	}
+
+	if r.res.StatusCode == http.StatusOK ||
+		r.res.StatusCode == http.StatusCreated ||
+		r.res.StatusCode == http.StatusNoContent {
+		// Non error status code
+		return r
+	}
+
+	if r.res.StatusCode == http.StatusNotFound {
+		r.err = ErrNotFound
+		return r
+	}
+
+	b, err := ioutil.ReadAll(r.res.Body)
+	if err == nil {
+		r.err = errors.New(string(b))
+		return r
+	}
+
+	r.err = ErrUnknown
+
+	return r
+}