forked from casdoor/casdoor
64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
// Copyright 2024 The casbin Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rule
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import (
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"fmt"
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"net/http"
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"regexp"
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"strings"
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"github.com/casdoor/casdoor/object"
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)
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type UaRule struct{}
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func (r *UaRule) checkRule(expressions []*object.Expression, req *http.Request) (*RuleResult, error) {
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userAgent := req.UserAgent()
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for _, expression := range expressions {
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ua := expression.Value
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reason := fmt.Sprintf("expression matched: \"%s %s %s\"", userAgent, expression.Operator, expression.Value)
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switch expression.Operator {
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case "contains":
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if strings.Contains(userAgent, ua) {
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return &RuleResult{Reason: reason}, nil
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}
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case "does not contain":
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if !strings.Contains(userAgent, ua) {
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return &RuleResult{Reason: reason}, nil
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}
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case "equals":
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if userAgent == ua {
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return &RuleResult{Reason: reason}, nil
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}
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case "does not equal":
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if strings.Compare(userAgent, ua) != 0 {
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return &RuleResult{Reason: reason}, nil
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}
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case "match":
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// regex match
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isHit, err := regexp.MatchString(ua, userAgent)
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if err != nil {
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return nil, err
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}
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if isHit {
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return &RuleResult{Reason: reason}, nil
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}
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}
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}
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return nil, nil
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}
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