miracle091/dnscrypt-proxy
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Code Issues Releases Wiki Activity

Make fetchWithCache() more readable

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This commit is contained in:
Frank Denis 2023-08-11 11:24:54 +02:00
parent a108d048d8
commit bdf27330c9
1 changed files with 14 additions and 10 deletions
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24
dnscrypt-proxy/sources.go
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@ -145,15 +145,17 @@ func (source *Source) fetchWithCache(xTransport *XTransport, now time.Time) (tim
}
dlog.Debugf("Source [%s] cache file [%s] not present", source.name, source.cacheFile)
}
if len(source.urls) > 0 {
defer func() {
source.refresh = now.Add(ttl)
}()
}
if len(source.urls) == 0 || ttl > 0 {
if len(source.urls) == 0 {
return 0, err
}
if ttl > 0 {
source.refresh = now.Add(ttl)
return 0, err
}
ttl = MinimumPrefetchInterval
source.refresh = now.Add(ttl)
var bin, sig []byte
for _, srcURL := range source.urls {
dlog.Infof("Source [%s] loading from URL [%s]", source.name, srcURL)
@ -168,16 +170,18 @@ func (source *Source) fetchWithCache(xTransport *XTransport, now time.Time) (tim
dlog.Debugf("Source [%s] failed to download signature from URL [%s]", source.name, sigURL)
continue
}
if err = source.checkSignature(bin, sig); err == nil {
break // valid signature
} // above err check inverted to make use of implicit continue
dlog.Debugf("Source [%s] failed signature check using URL [%s]", source.name, srcURL)
if err = source.checkSignature(bin, sig); err != nil {
dlog.Debugf("Source [%s] failed signature check using URL [%s]", source.name, srcURL)
continue
}
break // valid signature
}
if err != nil {
return 0, err
}
source.updateCache(bin, sig, now)
ttl = source.prefetchDelay
source.refresh = now.Add(ttl)
return ttl, nil
}