// readFile reads the named file in Google Cloud Storage.
func (d *demo) readFile(fileName string) {
io.WriteString(d.w, "\nAbbreviated file content (first line and last 1K):\n")
rc, err := storage.NewReader(d.ctx, bucket, fileName)
if err != nil {
d.errorf("readFile: unable to open file from bucket %q, file %q: %v", bucket, fileName, err)
return
}
defer rc.Close()
slurp, err := ioutil.ReadAll(rc)
if err != nil {
d.errorf("readFile: unable to read data from bucket %q, file %q: %v", bucket, fileName, err)
return
}
fmt.Fprintf(d.w, "%s\n", bytes.SplitN(slurp, []byte("\n"), 2)[0])
if len(slurp) > 1024 {
fmt.Fprintf(d.w, "...%s\n", slurp[len(slurp)-1024:])
} else {
fmt.Fprintf(d.w, "%s\n", slurp)
}
}
// getInstalledTLS returns the TLS certificate and key stored on Google Cloud Storage for the
// instance defined in d.Conf.
func (d *Deployer) getInstalledTLS() (certPEM, keyPEM []byte, err error) {
ctx := cloud.NewContext(d.Conf.Project, d.Client)
getFile := func(name string) ([]byte, error) {
sr, err := cloudstorage.NewReader(ctx, d.Conf.bucketBase(),
path.Join(configDir, name))
if err != nil {
return nil, err
}
defer sr.Close()
return ioutil.ReadAll(sr)
}
var grp syncutil.Group
grp.Go(func() (err error) {
certPEM, err = getFile(certFilename)
return
})
grp.Go(func() (err error) {
keyPEM, err = getFile(keyFilename)
return
})
err = grp.Err()
return
}