add whois as RDAP fallback

CHANGELOG.md

@@ -1,5 +1,9 @@
 [Unreleased]
 
+## v1.2.0
+### Added
+- add whois as RDAP fallback
+
 ## v1.1.0
 ### Added
 - add output formats

README.md

@@ -3,6 +3,8 @@ Expiration check
 
 Checks the expiration dates of domains et certificates.
 
+Domain expiration check uses [`RDAP`](https://about.rdap.org/) and fallback with a `whois` request.
+
 ## Usage
 
 Go to [releases](https://gitnet.fr/deblan/expiration-check/releases) and download the latest version.

checker/domains.go

@@ -5,8 +5,11 @@ import (
 	"fmt"
 	"math"
 	"net/http"
+	"regexp"
 	"strings"
 	"time"
+
+	"github.com/likexian/whois"
 )
 
 type RdapResponseData struct {
@@ -72,6 +75,52 @@ func RdapCheck(domain, service string) Domain {
 	return Domain{Name: domain, Failed: true}
 }
 
+func WhoisCheck(domain string) Domain {
+	domainFailed := Domain{Name: domain, Failed: true}
+	result, err := whois.Whois(domain)
+	if err != nil {
+		return domainFailed
+	}
+
+	now := time.Now()
+	formats := []string{
+		"expiration date",
+		"expiry date",
+		"expires on",
+		"paid-till",
+		"renewal",
+		"expires",
+		"domain_datebilleduntil",
+		"expiration",
+		"registry expiry",
+		"registrar registration expiration",
+	}
+
+	result = strings.ToLower(result)
+
+	for _, format := range formats {
+		r, _ := regexp.Compile(fmt.Sprintf(`%s\s*:?\s*([^\s]+)`, format))
+
+		for i, match := range r.FindStringSubmatch(result) {
+			if i%2 == 1 {
+				date, err := time.Parse(time.RFC3339, strings.ToUpper(match))
+
+				if err == nil {
+					daysLeft := date.Sub(now).Hours() / 24
+
+					return Domain{
+						Name:     domain,
+						DaysLeft: math.Floor(daysLeft),
+						Date:     date.Format(time.DateTime),
+					}
+				}
+			}
+		}
+	}
+
+	return domainFailed
+}
+
 func CheckDomains(domains []string) []Domain {
 	values := []Domain{}
 	services := GetRdapServices()
@@ -83,7 +132,7 @@ func CheckDomains(domains []string) []Domain {
 		if service != "" {
 			values = append(values, RdapCheck(domain, service))
 		} else {
-			values = append(values, Domain{Name: domain, Failed: true})
+			values = append(values, WhoisCheck(domain))
 		}
 	}
 

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/jedib0t/go-pretty v4.3.0+incompatible // indirect
 	github.com/jedib0t/go-pretty/v6 v6.5.9 // indirect
+	github.com/likexian/whois v1.15.4 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/oklog/ulid v1.3.1 // indirect
@@ -18,5 +19,6 @@ require (
 	github.com/urfave/cli/v2 v2.27.2 // indirect
 	github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913 // indirect
 	go.mongodb.org/mongo-driver v1.14.0 // indirect
-	golang.org/x/sys v0.17.0 // indirect
+	golang.org/x/net v0.27.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
 )

go.sum

@@ -12,6 +12,8 @@ github.com/jedib0t/go-pretty v4.3.0+incompatible h1:CGs8AVhEKg/n9YbUenWmNStRW2PH
 github.com/jedib0t/go-pretty v4.3.0+incompatible/go.mod h1:XemHduiw8R651AF9Pt4FwCTKeG3oo7hrHJAoznj9nag=
 github.com/jedib0t/go-pretty/v6 v6.5.9 h1:ACteMBRrrmm1gMsXe9PSTOClQ63IXDUt03H5U+UV8OU=
 github.com/jedib0t/go-pretty/v6 v6.5.9/go.mod h1:zbn98qrYlh95FIhwwsbIip0LYpwSG8SUOScs+v9/t0E=
+github.com/likexian/whois v1.15.4 h1:r5En62c+S9HKFgJtdh2WsdmRGTcxE4WUtGBdZkSBXmM=
+github.com/likexian/whois v1.15.4/go.mod h1:rXFTPcQdNlPQBJCQpPWTSIDGzzmgKBftmhdOOcLpwXk=
 github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
@@ -28,5 +30,9 @@ github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913 h1:+qGGcbkzsfDQNPPe
 github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913/go.mod h1:4aEEwZQutDLsQv2Deui4iYQ6DWTxR14g6m8Wv88+Xqk=
 go.mongodb.org/mongo-driver v1.14.0 h1:P98w8egYRjYe3XDjxhYJagTokP/H6HzlsnojRgZRd80=
 go.mongodb.org/mongo-driver v1.14.0/go.mod h1:Vzb0Mk/pa7e6cWw85R4F/endUC3u0U9jGcNU603k65c=
+golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=