01484832fc
* feat: Add [DOMAIN_EXPIRATION] placeholder for monitoring domain expiration using WHOIS * test: Fix issue caused by possibility of millisecond elapsed during previous tests * test: Fix test with different behavior based on architecture * docs: Revert accidental change to starttls example * docs: Fix mistake in comment for Condition.hasIPPlaceholder()
95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
package whois
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import (
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"io"
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"net"
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"strings"
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"time"
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)
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const (
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ianaWHOISServerAddress = "whois.iana.org:43"
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)
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type Client struct {
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whoisServerAddress string
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}
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func NewClient() *Client {
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return &Client{
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whoisServerAddress: ianaWHOISServerAddress,
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}
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}
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func (c Client) Query(domain string) (string, error) {
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parts := strings.Split(domain, ".")
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output, err := c.query(c.whoisServerAddress, parts[len(parts)-1])
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if err != nil {
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return "", err
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}
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if strings.Contains(output, "whois:") {
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startIndex := strings.Index(output, "whois:") + 6
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endIndex := strings.Index(output[startIndex:], "\n") + startIndex
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whois := strings.TrimSpace(output[startIndex:endIndex])
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if referOutput, err := c.query(whois+":43", domain); err == nil {
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return referOutput, nil
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}
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return "", err
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}
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return output, nil
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}
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func (c Client) query(whoisServerAddress, domain string) (string, error) {
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connection, err := net.DialTimeout("tcp", whoisServerAddress, 10*time.Second)
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if err != nil {
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return "", err
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}
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defer connection.Close()
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connection.SetDeadline(time.Now().Add(5 * time.Second))
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_, err = connection.Write([]byte(domain + "\r\n"))
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if err != nil {
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return "", err
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}
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output, err := io.ReadAll(connection)
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if err != nil {
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return "", err
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}
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return string(output), nil
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}
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type Response struct {
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ExpirationDate time.Time
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DomainStatuses []string
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NameServers []string
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}
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// QueryAndParse tries to parse the response from the WHOIS server
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// There is no standardized format for WHOIS responses, so this is an attempt at best.
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//
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// Being the selfish person that I am, I also only parse the fields that I need.
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// If you need more fields, please open an issue or pull request.
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func (c Client) QueryAndParse(domain string) (*Response, error) {
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text, err := c.Query(domain)
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if err != nil {
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return nil, err
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}
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response := Response{}
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for _, line := range strings.Split(text, "\n") {
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line = strings.TrimSpace(line)
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valueStartIndex := strings.Index(line, ":")
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if valueStartIndex == -1 {
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continue
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}
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key := strings.ToLower(strings.TrimSpace(line[:valueStartIndex]))
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value := strings.TrimSpace(line[valueStartIndex+1:])
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if response.ExpirationDate.Unix() != 0 && strings.Contains(key, "expir") && strings.Contains(key, "date") {
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response.ExpirationDate, _ = time.Parse(time.RFC3339, strings.ToUpper(value))
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} else if strings.Contains(key, "domain status") {
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response.DomainStatuses = append(response.DomainStatuses, value)
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} else if strings.Contains(key, "name server") {
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response.NameServers = append(response.NameServers, value)
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}
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}
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return &response, nil
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}
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