85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
// Copyright © 2017 The virtual-kubelet authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package api
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import (
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"io"
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"net/http"
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"github.com/virtual-kubelet/virtual-kubelet/errdefs"
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"github.com/virtual-kubelet/virtual-kubelet/log"
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)
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type handlerFunc func(http.ResponseWriter, *http.Request) error
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func handleError(f handlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, req *http.Request) {
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err := f(w, req)
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if err == nil {
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return
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}
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code := httpStatusCode(err)
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w.WriteHeader(code)
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if _, err := io.WriteString(w, err.Error()); err != nil {
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log.G(req.Context()).WithError(err).Error("error writing error response")
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}
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logger := log.G(req.Context()).WithError(err).WithField("httpStatusCode", code)
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if code >= 500 {
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logger.Error("Internal server error on request")
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} else {
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logger.Debug("Error on request")
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}
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}
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}
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func flushOnWrite(w io.Writer) io.Writer {
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if fw, ok := w.(writeFlusher); ok {
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return &flushWriter{fw}
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}
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return w
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}
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type flushWriter struct {
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w writeFlusher
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}
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type writeFlusher interface {
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Flush()
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Write([]byte) (int, error)
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}
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func (fw *flushWriter) Write(p []byte) (int, error) {
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n, err := fw.w.Write(p)
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if n > 0 {
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fw.w.Flush()
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}
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return n, err
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}
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func httpStatusCode(err error) int {
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switch {
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case err == nil:
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return http.StatusOK
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case errdefs.IsNotFound(err):
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return http.StatusNotFound
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case errdefs.IsInvalidInput(err):
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return http.StatusBadRequest
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default:
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return http.StatusInternalServerError
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}
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}
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