openapi3: remove email string format (#727)

README.md

@@ -201,6 +201,9 @@ func arrayUniqueItemsChecker(items []interface{}) bool {
 
 ## Sub-v0 breaking API changes
 
+### v0.113.0
+* The string format `email` has been removed by default. To use it please call `openapi3.DefineStringFormat("email", openapi3.FormatOfStringForEmail)`.
+
 ### v0.112.0
 * `(openapi3.ValidationOptions).ExamplesValidationDisabled` has been unexported.
 * `(openapi3.ValidationOptions).SchemaFormatValidationEnabled` has been unexported.

openapi3/schema_formats.go

@@ -10,6 +10,10 @@ import (
 const (
 	// FormatOfStringForUUIDOfRFC4122 is an optional predefined format for UUID v1-v5 as specified by RFC4122
 	FormatOfStringForUUIDOfRFC4122 = `^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$`
+
+	// FormatOfStringForEmail pattern catches only some suspiciously wrong-looking email addresses.
+	// Use DefineStringFormat(...) if you need something stricter.
+	FormatOfStringForEmail = `^[^@]+@[^@<>",\s]+$`
 )
 
 // FormatCallback performs custom checks on exotic formats
@@ -79,10 +83,6 @@ func validateIPv6(ip string) error {
 }
 
 func init() {
-	// This pattern catches only some suspiciously wrong-looking email addresses.
-	// Use DefineStringFormat(...) if you need something stricter.
-	DefineStringFormat("email", `^[^@]+@[^@<>",\s]+$`)
-
 	// Base64
 	// The pattern supports base64 and b./ase64url. Padding ('=') is supported.
 	DefineStringFormat("byte", `(^$|^[a-zA-Z0-9+/\-_]*=*$)`)