// getRawConfig gets the raw configuration data from p.configUrl.
// Supported URL schemes are:
// http:// remote resource accessed via http
// oem:// local file in /usr/share/oem or /mnt/oem
func (p *provider) getRawConfig() bool {
url, err := url.Parse(p.configUrl)
if err != nil {
p.logger.Err("failed to parse url: %v", err)
return false
}
data, err := util.FetchResource(p.logger, *url)
if err != nil {
p.logger.Err("failed to fetch %v: %v", url, err)
return false
}
p.rawConfig = data
return true
}
// 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,
}
}