34 lines
970 B
Go
34 lines
970 B
Go
package ratelimits
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import (
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"strings"
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"github.com/letsencrypt/boulder/core"
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"github.com/weppos/publicsuffix-go/publicsuffix"
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)
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// joinWithColon joins the provided args with a colon.
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func joinWithColon(args ...string) string {
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return strings.Join(args, ":")
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}
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// DomainsForRateLimiting transforms a list of FQDNs into a list of eTLD+1's
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// for the purpose of rate limiting. It also de-duplicates the output
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// domains. Exact public suffix matches are included.
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func DomainsForRateLimiting(names []string) []string {
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var domains []string
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for _, name := range names {
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domain, err := publicsuffix.Domain(name)
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if err != nil {
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// The only possible errors are:
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// (1) publicsuffix.Domain is giving garbage values
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// (2) the public suffix is the domain itself
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// We assume 2 and include the original name in the result.
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domains = append(domains, name)
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} else {
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domains = append(domains, domain)
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}
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}
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return core.UniqueLowerNames(domains)
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}
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