1  // Copyright (c) 2024-2026 Tencent Zhuque Lab. All rights reserved.
 2  //
 3  // Licensed under the Apache License, Version 2.0 (the "License");
 4  // you may not use this file except in compliance with the License.
 5  // You may obtain a copy of the License at
 6  //
 7  //     http://www.apache.org/licenses/LICENSE-2.0
 8  //
 9  // Unless required by applicable law or agreed to in writing, software
10  // distributed under the License is distributed on an "AS IS" BASIS,
11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  // See the License for the specific language governing permissions and
13  // limitations under the License.
14  //
15  // Requirement: Any integration or derivative work must explicitly attribute
16  // Tencent Zhuque Lab (https://github.com/Tencent/AI-Infra-Guard) in its
17  // documentation or user interface, as detailed in the NOTICE file.
18  
19  // Package httpx title
20  package httpx
21  
22  import (
23  	"regexp"
24  	"strings"
25  
26  	"golang.org/x/net/html"
27  )
28  
29  // ExtractTitle from a response
30  func ExtractTitle(resp string) (title string) {
31  	var re = regexp.MustCompile(`(?im)<\s*title.*>(.*?)<\s*/\s*title>`)
32  	for _, match := range re.FindAllString(resp, -1) {
33  		title = html.UnescapeString(trimTitleTags(match))
34  		break
35  	}
36  	return
37  }
38  
39  func trimTitleTags(title string) string {
40  	// trim <title>*</title>
41  	titleBegin := strings.Index(title, ">")
42  	titleEnd := strings.Index(title, "</")
43  	return title[titleBegin+1 : titleEnd]
44  }