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// Copyright 2017 The Cockroach 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 testserver
import (
"fmt"
"io"
"log"
"mime"
"net/http"
"net/url"
"os"
"os/exec"
"path"
"path/filepath"
"regexp"
"runtime"
"time"
)
const (
latestSuffix = "LATEST"
finishedFileMode = 0555
)
func downloadFile(response *http.Response, filePath string) error {
output, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0200)
if err != nil {
return fmt.Errorf("error creating %s: %s", filePath, err)
}
defer func() { _ = output.Close() }()
log.Printf("saving %s to %s, this may take some time", response.Request.URL, filePath)
if _, err := io.Copy(output, response.Body); err != nil {
return fmt.Errorf("problem saving %s to %s: %s", response.Request.URL, filePath, err)
}
// Download was successful, add the rw bits.
if err := output.Chmod(finishedFileMode); err != nil {
return err
}
// We explicitly close here to ensure the error is checked; the deferred
// close above will likely error in this case, but that's harmless.
return output.Close()
}
var muslRE = regexp.MustCompile(`(?i)\bmusl\b`)
func downloadLatestBinary() (string, error) {
goos := runtime.GOOS
if goos == "linux" {
goos += func() string {
// Detect which C library is present on the system. See
// https://unix.stackexchange.com/a/120381.
cmd := exec.Command("ldd", "--version")
out, err := cmd.Output()
if err != nil {
log.Printf("%s: out=%q err=%s", cmd.Args, out, err)
} else if muslRE.Match(out) {
return "-musl"
}
return "-gnu"
}()
}
binaryName := fmt.Sprintf("cockroach.%s-%s", goos, runtime.GOARCH)
if runtime.GOOS == "windows" {
binaryName += ".exe"
}
url := &url.URL{
Scheme: "https",
Host: "edge-binaries.cockroachdb.com",
Path: path.Join("cockroach", fmt.Sprintf("%s.%s", binaryName, latestSuffix)),
}
log.Printf("GET %s", url)
response, err := http.Get(url.String())
if err != nil {
return "", err
}
defer func() { _ = response.Body.Close() }()
if response.StatusCode != 200 {
return "", fmt.Errorf("error downloading %s: %d (%s)", url, response.StatusCode, response.Status)
}
const contentDisposition = "Content-Disposition"
_, disposition, err := mime.ParseMediaType(response.Header.Get(contentDisposition))
if err != nil {
return "", fmt.Errorf("error parsing %s headers %s: %s", contentDisposition, response.Header, err)
}
filename, ok := disposition["filename"]
if !ok {
return "", fmt.Errorf("content disposition header %s did not contain filename", disposition)
}
localFile := filepath.Join(os.TempDir(), filename)
for {
info, err := os.Stat(localFile)
if os.IsNotExist(err) {
// File does not exist: download it.
break
}
if err != nil {
return "", err
}
// File already present: check mode.
if info.Mode().Perm() == finishedFileMode {
return localFile, nil
}
log.Printf("waiting for download of %s", localFile)
time.Sleep(time.Millisecond * 10)
}
if err := downloadFile(response, localFile); err != nil {
if err := os.Remove(localFile); err != nil {
log.Printf("failed to remove %s: %s", localFile, err)
}
return "", err
}
return localFile, nil
}
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