forked from casbin/casbin
/
builtin_operators.go
139 lines (112 loc) · 3.81 KB
/
builtin_operators.go
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"net"
"regexp"
"strings"
)
// KeyMatch determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *.
// For example, "/foo/bar" matches "/foo/*"
func KeyMatch(key1 string, key2 string) bool {
i := strings.Index(key2, "*")
if i == -1 {
return key1 == key2
}
if len(key1) > i {
return key1[:i] == key2[:i]
}
return key1 == key2[:i]
}
// KeyMatchFunc is the wrapper for KeyMatch.
func KeyMatchFunc(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(KeyMatch(name1, name2)), nil
}
// KeyMatch2 determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *.
// For example, "/foo/bar" matches "/foo/*", "/resource1" matches "/:resource"
func KeyMatch2(key1 string, key2 string) bool {
key2 = strings.Replace(key2, "/*", "/.*", -1)
re := regexp.MustCompile(`(.*):[^/]+(.*)`)
for {
if !strings.Contains(key2, "/:") {
break
}
key2 = "^" + re.ReplaceAllString(key2, "$1[^/]+$2") + "$"
}
return RegexMatch(key1, key2)
}
// KeyMatch2Func is the wrapper for KeyMatch2.
func KeyMatch2Func(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(KeyMatch2(name1, name2)), nil
}
// KeyMatch3 determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *.
// For example, "/foo/bar" matches "/foo/*", "/resource1" matches "/{resource}"
func KeyMatch3(key1 string, key2 string) bool {
key2 = strings.Replace(key2, "/*", "/.*", -1)
re := regexp.MustCompile(`(.*)\{[^/]+\}(.*)`)
for {
if !strings.Contains(key2, "/{") {
break
}
key2 = re.ReplaceAllString(key2, "$1[^/]+$2")
}
return RegexMatch(key1, key2)
}
// KeyMatch3Func is the wrapper for KeyMatch3.
func KeyMatch3Func(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(KeyMatch3(name1, name2)), nil
}
// RegexMatch determines whether key1 matches the pattern of key2 in regular expression.
func RegexMatch(key1 string, key2 string) bool {
res, err := regexp.MatchString(key2, key1)
if err != nil {
panic(err)
}
return res
}
// RegexMatchFunc is the wrapper for RegexMatch.
func RegexMatchFunc(args ...interface{}) (interface{}, error) {
name1 := args[0].(string)
name2 := args[1].(string)
return (bool)(RegexMatch(name1, name2)), nil
}
// IPMatch determines whether IP address ip1 matches the pattern of IP address ip2, ip2 can be an IP address or a CIDR pattern.
// For example, "192.168.2.123" matches "192.168.2.0/24"
func IPMatch(ip1 string, ip2 string) bool {
objIP1 := net.ParseIP(ip1)
if objIP1 == nil {
panic("invalid argument: ip1 in IPMatch() function is not an IP address.")
}
_, cidr, err := net.ParseCIDR(ip2)
if err != nil {
objIP2 := net.ParseIP(ip2)
if objIP2 == nil {
panic("invalid argument: ip2 in IPMatch() function is neither an IP address nor a CIDR.")
}
return objIP1.Equal(objIP2)
}
return cidr.Contains(objIP1)
}
// IPMatchFunc is the wrapper for IPMatch.
func IPMatchFunc(args ...interface{}) (interface{}, error) {
ip1 := args[0].(string)
ip2 := args[1].(string)
return (bool)(IPMatch(ip1, ip2)), nil
}