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debug.go
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debug.go
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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"io/ioutil"
"net/http"
"github.com/pkg/errors"
)
type debugWriterConfig struct {
serverURL string
tarballName string
endPointGroups []endpointsGroup
}
func debugWrite(cfg debugWriterConfig) error {
archiver, err := newTarGzFileWriter(cfg.tarballName)
if err != nil {
return errors.Wrap(err, "error creating a new archiver")
}
for _, endPointGroup := range cfg.endPointGroups {
for url, filename := range endPointGroup.urlToFilename {
url := cfg.serverURL + url
fmt.Println("collecting:", url)
res, err := http.Get(url)
if err != nil {
return errors.Wrap(err, "error executing HTTP request")
}
body, err := ioutil.ReadAll(res.Body)
res.Body.Close()
if err != nil {
return errors.Wrap(err, "error reading the response body")
}
if endPointGroup.postProcess != nil {
body, err = endPointGroup.postProcess(body)
if err != nil {
return errors.Wrap(err, "error post-processing HTTP response body")
}
}
if err := archiver.write(filename, body); err != nil {
return errors.Wrap(err, "error writing into the archive")
}
}
}
if err := archiver.close(); err != nil {
return errors.Wrap(err, "error closing archive writer")
}
fmt.Printf("Compiling debug information complete, all files written in %q.\n", cfg.tarballName)
return nil
}