mirror of https://github.com/knative/pkg.git
46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
/*
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Copyright 2019 The Knative Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package network
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import (
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"io/ioutil"
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"net/http"
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"go.uber.org/zap"
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)
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// ErrorHandler sets up a handler suitable for use with the ErrorHandler field on
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// httputil's reverse proxy.
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//
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// Deprecated: Use handler.Error instead.
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func ErrorHandler(logger *zap.SugaredLogger) func(http.ResponseWriter, *http.Request, error) {
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return func(w http.ResponseWriter, req *http.Request, err error) {
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ss := readSockStat(logger)
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logger.Errorw("error reverse proxying request; sockstat: "+ss, zap.Error(err))
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http.Error(w, err.Error(), http.StatusBadGateway)
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}
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}
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func readSockStat(logger *zap.SugaredLogger) string {
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b, err := ioutil.ReadFile("/proc/net/sockstat")
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if err != nil {
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logger.Errorw("Unable to read sockstat", zap.Error(err))
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return ""
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}
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return string(b)
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}
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