// fetchReferencedConfig fetches, renders, and attempts to verify the requested
// config.
func (e Engine) fetchReferencedConfig(cfgRef types.ConfigReference) (types.Config, error) {
rawCfg, err := util.FetchResource(e.Logger, url.URL(cfgRef.Source))
if err != nil {
return types.Config{}, err
}
if err := util.AssertValid(cfgRef.Verification, rawCfg); err != nil {
return types.Config{}, err
}
cfg, err := config.Parse(rawCfg)
if err != nil {
return types.Config{}, err
}
return e.renderConfig(cfg)
}
func RenderFile(l *log.Logger, f types.File) *File {
var contents []byte
var err error
fetch := func() error {
contents, err = util.FetchResource(l, url.URL(f.Contents.Source))
return err
}
validate := func() error {
return util.AssertValid(f.Contents.Verification, contents)
}
decompress := func() error {
contents, err = decompressFile(l, f, contents)
return err
}
if l.LogOp(fetch, "fetching file %q", f.Path) != nil {
return nil
}
if l.LogOp(validate, "validating file contents") != nil {
return nil
}
if l.LogOp(decompress, "decompressing file contents") != nil {
return nil
}
return &File{
Path: f.Path,
Contents: []byte(contents),
Mode: os.FileMode(f.Mode),
Uid: f.User.Id,
Gid: f.Group.Id,
}
}
// fetchReferencedConfig fetches, renders, and attempts to verify the requested
// config.
func (e Engine) fetchReferencedConfig(cfgRef types.ConfigReference) (types.Config, error) {
var rawCfg []byte
switch cfgRef.Source.Scheme {
case "http":
rawCfg = util.NewHttpClient(e.Logger).
FetchConfig(cfgRef.Source.String(), http.StatusOK, http.StatusNoContent)
if rawCfg == nil {
return types.Config{}, ErrNetworkFailure
}
default:
return types.Config{}, ErrSchemeUnsupported
}
if err := util.AssertValid(cfgRef.Verification, rawCfg); err != nil {
return types.Config{}, err
}
cfg, err := config.Parse(rawCfg)
if err != nil {
return types.Config{}, err
}
return e.renderConfig(cfg)
}