An invalid domain [.test.com] was specified for this cookie 原因分析

淩亂°似流年 2022-07-19 00:07 13阅读 0赞

[java.lang.IllegalArgumentException: An invalid domain \[.test.com\] was specified for this cookie][java.lang.IllegalArgumentException_ An invalid domain _.test.com_ was specified for this cookie]  
以上博客说明了解决办法以及可能的原因，现在就根据log查看tomcat源码看看是异常的原因以及在tomcat8.5上cookie name的规则。  
Rfc6265CookieProcessor源码的167-197行代码如下

private void validateDomain(String domain) {
            int i = 0;
            int prev = -1;
            int cur = -1;
            char[] chars = domain.toCharArray();
            while (i < chars.length) {
                prev = cur;
                cur = chars[i];
                if (!domainValid.get(cur)) {
                    throw new IllegalArgumentException(sm.getString(
                            "rfc6265CookieProcessor.invalidDomain", domain));
                }
                // labels must start with a letter or number
                if ((prev == '.' || prev == -1) && (cur == '.' || cur == '-')) {
                    throw new IllegalArgumentException(sm.getString(
                            "rfc6265CookieProcessor.invalidDomain", domain));
                }
                // labels must end with a letter or number
                if (prev == '-' && cur == '.') {
                    throw new IllegalArgumentException(sm.getString(
                            "rfc6265CookieProcessor.invalidDomain", domain));
                }
                i++;
            }
            // domain must end with a label
            if (cur == '.' || cur == '-') {
                throw new IllegalArgumentException(sm.getString(
                        "rfc6265CookieProcessor.invalidDomain", domain));
            }
        }

**domain规则如下**  
1、必须是1-9、a-z、A-Z、. 、- （注意是-不是\_）这几个字符组成  
2、必须是数字或字母开头

> 上篇文章使用.test.com报错就是因为使用”.”开头

3、必须是数字或字母结尾

**path的规则源码及规则**

private void validatePath(String path) {
            char[] chars = path.toCharArray();
    
            for (int i = 0; i < chars.length; i++) {
                char ch = chars[i];
                if (ch < 0x20 || ch > 0x7E || ch == ';') {
                    throw new IllegalArgumentException(sm.getString(
                            "rfc6265CookieProcessor.invalidPath", path));
                }
            }
        }

1、字符必须是在 0x20-0x7E之间，并且不能出现”;”号

**cookie value 源码及规则**

private void validateCookieValue(String value) {
            int start = 0;
            int end = value.length();
    
            if (end > 1 && value.charAt(0) == '"' && value.charAt(end - 1) == '"') {
                start = 1;
                end--;
            }
    
            char[] chars = value.toCharArray();
            for (int i = start; i < end; i++) {
                char c = chars[i];
                if (c < 0x21 || c == 0x22 || c == 0x2c || c == 0x3b || c == 0x5c || c == 0x7f) {
                    throw new IllegalArgumentException(sm.getString(
                            "rfc6265CookieProcessor.invalidCharInValue", Integer.toString(c)));
                }
            }
        }

1、会自动去除开头和结尾的引号”  
2、如果包含以下规则字符则校验失败：  
c < 0x21 || c == 0x22 || c == 0x2c || c == 0x3b || c == 0x5c || c == 0x7f

[java.lang.IllegalArgumentException_ An invalid domain _.test.com_ was specified for this cookie]: http://blog.csdn.net/cml_blog/article/details/52135115