100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
// Copyright 2022 The etcd 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 etcdhttp
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import (
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errorspkg "errors"
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"net/http"
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"go.uber.org/zap"
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httptypes "go.etcd.io/etcd/server/v3/etcdserver/api/etcdhttp/types"
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"go.etcd.io/etcd/server/v3/etcdserver/api/v2error"
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"go.etcd.io/etcd/server/v3/etcdserver/errors"
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)
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func allowMethod(w http.ResponseWriter, r *http.Request, m string) bool {
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if m == r.Method {
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return true
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}
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w.Header().Set("Allow", m)
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http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
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return false
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}
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// writeError logs and writes the given Error to the ResponseWriter
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// If Error is an etcdErr, it is rendered to the ResponseWriter
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// Otherwise, it is assumed to be a StatusInternalServerError
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func writeError(lg *zap.Logger, w http.ResponseWriter, r *http.Request, err error) {
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if err == nil {
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return
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}
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var v2Err *v2error.Error
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var httpErr *httptypes.HTTPError
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switch {
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case errorspkg.As(err, &v2Err):
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v2Err.WriteTo(w)
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case errorspkg.As(err, &httpErr):
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if et := httpErr.WriteTo(w); et != nil {
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if lg != nil {
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lg.Debug(
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"failed to write v2 HTTP error",
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zap.String("remote-addr", r.RemoteAddr),
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zap.String("internal-server-error", httpErr.Error()),
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zap.Error(et),
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)
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}
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}
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default:
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switch {
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case
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errorspkg.Is(err, errors.ErrTimeoutDueToLeaderFail),
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errorspkg.Is(err, errors.ErrTimeoutDueToConnectionLost),
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errorspkg.Is(err, errors.ErrNotEnoughStartedMembers),
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errorspkg.Is(err, errors.ErrUnhealthy):
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if lg != nil {
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lg.Warn(
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"v2 response error",
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zap.String("remote-addr", r.RemoteAddr),
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zap.String("internal-server-error", err.Error()),
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)
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}
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default:
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if lg != nil {
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lg.Warn(
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"unexpected v2 response error",
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zap.String("remote-addr", r.RemoteAddr),
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zap.String("internal-server-error", err.Error()),
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)
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}
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}
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herr := httptypes.NewHTTPError(http.StatusInternalServerError, "Internal Server Error")
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if et := herr.WriteTo(w); et != nil {
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if lg != nil {
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lg.Debug(
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"failed to write v2 HTTP error",
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zap.String("remote-addr", r.RemoteAddr),
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zap.String("internal-server-error", err.Error()),
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zap.Error(et),
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)
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}
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}
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}
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}
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