mondern slopify hand crafted code for the greater good.

(move from user specified blocklist download URLs to simply country codes with multiple providers available.)

provider_ipverse.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"net"
+	"net/http"
+	"strings"
+)
+
+const ipverseBaseURL = "https://raw.githubusercontent.com/ipverse/country-ip-blocks/master/country"
+
+// IPverseProvider fetches GeoIP data from the ipverse/country-ip-blocks GitHub repository.
+// Data is sourced from Regional Internet Registries (RIRs) and aggregated by ipverse.
+// Repository: https://github.com/ipverse/country-ip-blocks
+type IPverseProvider struct{}
+
+func (p *IPverseProvider) Name() string {
+	return "ipverse"
+}
+
+// FetchCIDRs downloads IPv4 CIDR blocks for a country from ipverse.
+// URL format: https://raw.githubusercontent.com/ipverse/country-ip-blocks/master/country/{cc}/ipv4-aggregated.txt
+func (p *IPverseProvider) FetchCIDRs(countryCode string) ([]string, error) {
+	url := fmt.Sprintf("%s/%s/ipv4-aggregated.txt", ipverseBaseURL, strings.ToLower(countryCode))
+	return downloadAndParseCIDRs(url)
+}
+
+// downloadAndParseCIDRs is a shared helper that downloads a URL containing
+// one CIDR per line and returns validated CIDR strings.
+func downloadAndParseCIDRs(url string) ([]string, error) {
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, fmt.Errorf("http get error on url %q: %v", url, err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected http status %d from %q", resp.StatusCode, url)
+	}
+
+	scanner := bufio.NewScanner(resp.Body)
+	scanner.Split(bufio.ScanLines)
+
+	var cidrs []string
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+
+		// Skip empty lines and comments
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		_, ipnet, err := net.ParseCIDR(line)
+		if err != nil {
+			// Skip unparseable lines rather than failing the whole country
+			continue
+		}
+		cidrs = append(cidrs, ipnet.String())
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("error reading response body from %q: %v", url, err)
+	}
+
+	return cidrs, nil
+}