Major refactor to enable usage as a library

Author: Bradley Kemp

abwhose.go

@@ -2,14 +2,12 @@ package main
 
 import (
 	"fmt"
-	"net"
 	"net/url"
 	"os"
-	"os/exec"
 	"strings"
 	"text/tabwriter"
 
-	"golang.org/x/net/publicsuffix"
+	"github.com/bradleyjkemp/abwhose/matchers"
 )
 
 func main() {
@@ -23,101 +21,83 @@ func main() {
 	}
 }
 
-var tabWriter = tabwriter.NewWriter(os.Stdout, 12, 2, 1, ' ', tabwriter.TabIndent)
-
-func run(abuseURL string) error {
-	var abusive *url.URL
-	var err error
-	if strings.Contains(abuseURL, "/") {
-		// This looks like a full URL instead of a plain domain
-		if !strings.HasPrefix(abuseURL, "http://") && !strings.HasPrefix(abuseURL, "https://") {
-			// Doesn't have a protocol so won't url.Parse properly
-			abuseURL = "http://" + abuseURL
-		}
-
-		abusive, err = url.Parse(abuseURL)
-		if err != nil {
-			return fmt.Errorf("couldn't parse URL: %w", err)
-		}
-	} else {
-		// This is a plain domain name so we construct a URL directly
-		abusive = &url.URL{
-			Scheme: "http",
-			Host:   abuseURL,
-		}
-	}
-
-	if abusive.Hostname() == "" {
-		return fmt.Errorf("%s doesn't look like a valid URL (hostname is empty)", abuseURL)
+func run(query string) error {
+	u, err := parseURL(query)
+	if err != nil {
+		return err
 	}
 
-	// First look up abuse details for the domain itself (this will be the registrar)
-	rootDomain, _ := publicsuffix.EffectiveTLDPlusOne(abusive.Hostname())
-
-	// First check if this is a shared host
-	var sharedHost bool
-	for _, matcher := range sharedHostMatchers {
-		if match, display := matcher(rootDomain); match {
-			if !sharedHost {
-				fmt.Println("Report abuse to shared hosting provider:")
-			}
-			display()
-			sharedHost = true
-		}
-	}
-	// If this is a shared host then skip the WHOIS lookup
-	// as that information isn't useful.
-	if sharedHost {
+	if ok, contact := matchers.IsSharedHostingProvider(u); ok {
+		fmt.Println("Report abuse to shared hosting provider:")
+		printContactDetails(u, contact)
+		// If this is a shared host then skip the rest of the lookups
+		// as that information isn't useful.
 		return nil
 	}
 
-	err = getAbuseReportDetails("Report abuse to domain registrar:", abusive, rootDomain)
+	contacts, err := matchers.Registrar(u)
 	if err != nil {
-		return fmt.Errorf("failed to get registrar abuse details: %w", err)
-	}
-
-	// Now look up the IP in order to find the hosting provider
-	ips, err := net.LookupIP(abusive.Hostname())
-	if err != nil {
-		return fmt.Errorf("failed to find hosting provider: %w", err)
+		return err
 	}
+	fmt.Println("Report abuse to domain registrar:")
+	printContactDetails(u, contacts...)
 
-	// Abuse details for the IP should be the hosting provider
-	err = getAbuseReportDetails("Report abuse to host:", abusive, ips[0].String())
+	contacts, err = matchers.HostingProvider(u)
 	if err != nil {
-		return fmt.Errorf("failed to get host abuse details: %w", err)
+		return err
 	}
+	fmt.Println("Report abuse to hosting provider:")
+	printContactDetails(u, contacts...)
 	return nil
 }
 
-func getAbuseReportDetails(header string, abusive *url.URL, query string) error {
-	rawWhois, err := exec.Command("whois", query).CombinedOutput()
+func parseURL(input string) (*url.URL, error) {
+	if !strings.Contains(input, "/") {
+		// This is likely a plain domain name so we construct a URL directly
+		return &url.URL{
+			Scheme: "http",
+			Host:   input,
+		}, nil
+	}
+
+	// This looks like a full URL instead of a plain domain
+	if !strings.HasPrefix(input, "http://") && !strings.HasPrefix(input, "https://") {
+		// Doesn't have a protocol so won't url.Parse properly
+		input = "http://" + input
+	}
+
+	u, err := url.Parse(input)
 	if err != nil {
-		return err
+		return nil, fmt.Errorf("couldn't parse URL: %w", err)
+	}
+	if u.Hostname() == "" {
+		return nil, fmt.Errorf("%s doesn't look like a valid URL (hostname is empty)", input)
 	}
 
-	gotMatch := false
-	for _, matcher := range whoisMatchers {
-		if match, display := matcher(string(rawWhois)); match {
-			if !gotMatch {
-				fmt.Println(header)
-				gotMatch = true
+	return u, nil
+}
+
+var tabWriter = tabwriter.NewWriter(os.Stdout, 12, 2, 1, ' ', tabwriter.TabIndent)
+
+func printContactDetails(u *url.URL, contacts ...matchers.ProviderContact) {
+	for _, contact := range contacts {
+		switch c := contact.(type) {
+		case matchers.AbuseEmail:
+			if emailTemplateConfigured() {
+				offerToSendEmail(u, c)
+			} else {
+				fmt.Fprintf(tabWriter, "  Email:\t%s\n", c.Email)
 			}
-			display()
+
+		case matchers.OnlineForm:
+			fmt.Fprintf(tabWriter, "  %s:\tFill out abuse form %s\n", contact.Name(), c.URL)
+
+		default:
+			panic(fmt.Sprintf("unknown contact type: %T", contact))
 		}
 	}
-	if gotMatch {
-		return nil
+	if len(contacts) == 0 {
+		fmt.Fprintf(tabWriter, "  Couldn't find any contact details\n")
 	}
-
-	// None of the specific matchers hit so use a generic one
-	found, display := fallbackEmailMatcher(header, abusive, string(rawWhois))
-	if found {
-		display()
-		return nil
-	}
-
-	fmt.Println(header)
-	fmt.Println("  couldn't find any abuse contact details")
-	return nil
+	tabWriter.Flush()
 }

email_template.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"html/template"
+	"io/ioutil"
+	"net/url"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/bradleyjkemp/abwhose/matchers"
+)
+
+func emailTemplateConfigured() bool {
+	_, configured := os.LookupEnv("ABWHOSE_MAILTO_TEMPLATE")
+	return configured
+}
+
+func offerToSendEmail(u *url.URL, contact matchers.AbuseEmail) {
+	emailTemplateFile, _ := os.LookupEnv("ABWHOSE_MAILTO_TEMPLATE")
+	emailTemplateContents, err := ioutil.ReadFile(emailTemplateFile)
+	if err != nil {
+		fmt.Printf("Failed reading email template: %v\n", err)
+		return
+	}
+	mailto := &bytes.Buffer{}
+	err = template.Must(template.New("email").Parse(string(emailTemplateContents))).Execute(mailto, map[string]interface{}{
+		"domain":    strings.Replace(u.Hostname(), ".", "[.]", -1),
+		"url":       strings.Replace(u.Hostname(), ".", "[.]", -1) + u.RawPath + u.RawQuery,
+		"recipient": contact.Email,
+	})
+	if err != nil {
+		fmt.Printf("Error templating email: %v\n", err)
+		return
+	}
+	fmt.Printf("  Send email to %s? [Y/n] ", contact.Email)
+	if userSaysYes() {
+		exec.Command("open", mailto.String()).Run()
+	}
+}
+
+func userSaysYes() bool {
+	var response string
+	_, err := fmt.Scanln(&response)
+	if err != nil && err.Error() != "unexpected newline" {
+		panic(err)
+	}
+	okayResponses := map[string]bool{
+		"":    true,
+		"y":   true,
+		"yes": true,
+	}
+	if okayResponses[strings.ToLower(response)] {
+		return true
+	}
+	return false
+}