文件支持防盗链配置

RuoYi

2025-09-02 1d2c8378f7b84521cb513967bd25517da9376fb2

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
package com.ruoyi.file.filter;
 
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
/**
 * 防盗链过滤器
 * 
 * @author ruoyi
 */
public class RefererFilter implements Filter
{
    /**
     * 允许的域名列表
     */
    public List<String> allowedDomains;
 
    @Override
    public void init(FilterConfig filterConfig) throws ServletException
    {
        String domains = filterConfig.getInitParameter("allowedDomains");
        this.allowedDomains = Arrays.asList(domains.split(","));
    }
 
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException
    {
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse resp = (HttpServletResponse) response;
 
        String referer = req.getHeader("Referer");
 
        // 如果Referer为空，拒绝访问
        if (referer == null || referer.isEmpty())
        {
            resp.sendError(HttpServletResponse.SC_FORBIDDEN, "Access denied: Referer header is required");
            return;
        }
 
        // 检查Referer是否在允许的域名列表中
        boolean allowed = false;
        for (String domain : allowedDomains)
        {
            if (referer.contains(domain))
            {
                allowed = true;
                break;
            }
        }
 
        // 根据检查结果决定是否放行
        if (allowed)
        {
            chain.doFilter(request, response);
        }
        else
        {
            resp.sendError(HttpServletResponse.SC_FORBIDDEN, "Access denied: Referer '" + referer + "' is not allowed");
        }
    }
 
    @Override
    public void destroy()
    {
 
    }
}