feat: publish v1.0.0-rc.36-custom.1

relaykit/relayconvert/kitutil/mask.go

@@ -0,0 +1,131 @@
+package kitutil
+
+import (
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+var (
+	maskURLPattern    = regexp.MustCompile(`(http|https)://[^\s/$.?#].[^\s]*`)
+	maskDomainPattern = regexp.MustCompile(`\b(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}\b`)
+	maskIPPattern     = regexp.MustCompile(`\b(?:\d{1,3}\.){3}\d{1,3}\b`)
+	// maskApiKeyPattern matches patterns like 'api_key:xxx' or "api_key:xxx" to mask the API key value
+	maskApiKeyPattern = regexp.MustCompile(`(['"]?)api_key:([^\s'"]+)(['"]?)`)
+)
+
+// maskHostTail returns the tail parts of a domain/host that should be preserved.
+// It keeps 2 parts for likely country-code TLDs (e.g., co.uk, com.cn), otherwise keeps only the TLD.
+func maskHostTail(parts []string) []string {
+	if len(parts) < 2 {
+		return parts
+	}
+	lastPart := parts[len(parts)-1]
+	secondLastPart := parts[len(parts)-2]
+	if len(lastPart) == 2 && len(secondLastPart) <= 3 {
+		// Likely country code TLD like co.uk, com.cn
+		return []string{secondLastPart, lastPart}
+	}
+	return []string{lastPart}
+}
+
+// maskHostForURL collapses subdomains and keeps only masked prefix + preserved tail.
+// Example: api.openai.com -> ***.com, sub.domain.co.uk -> ***.co.uk
+func maskHostForURL(host string) string {
+	parts := strings.Split(host, ".")
+	if len(parts) < 2 {
+		return "***"
+	}
+	tail := maskHostTail(parts)
+	return "***." + strings.Join(tail, ".")
+}
+
+// maskHostForPlainDomain masks a plain domain and reflects subdomain depth with multiple ***.
+// Example: openai.com -> ***.com, api.openai.com -> ***.***.com, sub.domain.co.uk -> ***.***.co.uk
+func maskHostForPlainDomain(domain string) string {
+	parts := strings.Split(domain, ".")
+	if len(parts) < 2 {
+		return domain
+	}
+	tail := maskHostTail(parts)
+	numStars := max(len(parts)-len(tail), 1)
+	stars := strings.TrimSuffix(strings.Repeat("***.", numStars), ".")
+	return stars + "." + strings.Join(tail, ".")
+}
+
+// MaskSensitiveInfo masks sensitive information like URLs, IPs, and domain names in a string
+// Example:
+// http://example.com -> http://***.com
+// https://api.test.org/v1/users/123?key=secret -> https://***.org/***/***/?key=***
+// https://sub.domain.co.uk/path/to/resource -> https://***.co.uk/***/***
+// 192.168.1.1 -> ***.***.***.***
+// openai.com -> ***.com
+// www.openai.com -> ***.***.com
+// api.openai.com -> ***.***.com
+func MaskSensitiveInfo(str string) string {
+	// Mask URLs
+	str = maskURLPattern.ReplaceAllStringFunc(str, func(urlStr string) string {
+		u, err := url.Parse(urlStr)
+		if err != nil {
+			return urlStr
+		}
+
+		host := u.Host
+		if host == "" {
+			return urlStr
+		}
+
+		// Mask host with unified logic
+		maskedHost := maskHostForURL(host)
+
+		result := u.Scheme + "://" + maskedHost
+
+		// Mask path
+		if u.Path != "" && u.Path != "/" {
+			pathParts := strings.Split(strings.Trim(u.Path, "/"), "/")
+			maskedPathParts := make([]string, len(pathParts))
+			for i := range pathParts {
+				if pathParts[i] != "" {
+					maskedPathParts[i] = "***"
+				}
+			}
+			if len(maskedPathParts) > 0 {
+				result += "/" + strings.Join(maskedPathParts, "/")
+			}
+		} else if u.Path == "/" {
+			result += "/"
+		}
+
+		// Mask query parameters
+		if u.RawQuery != "" {
+			values, err := url.ParseQuery(u.RawQuery)
+			if err != nil {
+				// If can't parse query, just mask the whole query string
+				result += "?***"
+			} else {
+				maskedParams := make([]string, 0, len(values))
+				for key := range values {
+					maskedParams = append(maskedParams, key+"=***")
+				}
+				if len(maskedParams) > 0 {
+					result += "?" + strings.Join(maskedParams, "&")
+				}
+			}
+		}
+
+		return result
+	})
+
+	// Mask domain names without protocol (like openai.com, www.openai.com)
+	str = maskDomainPattern.ReplaceAllStringFunc(str, func(domain string) string {
+		return maskHostForPlainDomain(domain)
+	})
+
+	// Mask IP addresses
+	str = maskIPPattern.ReplaceAllString(str, "***.***.***.***")
+
+	// Mask API keys (e.g., "api_key:AIzaSyAAAaUooTUni8AdaOkSRMda30n_Q4vrV70" -> "api_key:***")
+	str = maskApiKeyPattern.ReplaceAllString(str, "${1}api_key:***${3}")
+
+	return str
+}