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42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
package rrtourl
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import (
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"fmt"
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"strings"
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"github.com/miekg/dns"
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"github.com/namecoin/ncdns/util"
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)
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// URLsFromRR returns a list of URL's derived from rr, which is suitable for
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// passing to a search engine crawler like YaCy. If no such list can be
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// derived, returns an empty string.
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func URLsFromRR(rr dns.RR) (string, error) {
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header := rr.Header()
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if header == nil {
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return "", fmt.Errorf("Nil RR header")
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}
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hostFQDN := header.Name
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// Remove things like "_443._tcp" in TLSA records
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for strings.HasPrefix(hostFQDN, "_") {
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_, hostFQDN = util.SplitDomainTail(hostFQDN)
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}
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// Remove the trailing period from FQDN's
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host := strings.TrimSuffix(hostFQDN, ".")
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// Remove wildcard subdomains (later we assume that they might be "www.")
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host = strings.TrimPrefix(host, "*.")
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return "http://" + host + "/" + "\n" +
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"http://www." + host + "/" + "\n" +
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"https://" + host + "/" + "\n" +
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"https://www." + host + "/" + "\n" +
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"ftp://" + host + "/" + "\n" +
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"ftp://www." + host + "/" + "\n" +
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"ftps://" + host + "/" + "\n" +
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"ftps://www." + host + "/" + "\n", nil
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}
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