添加cookie

                        // 设置登录状态cookie
                        Cookie cookie = new Cookie("loginStatus",JSON.toJSONString(loginStatus));
                        cookie.setMaxAge(minutes * 60);
                        cookie.setDomain("cnki.net");
                        cookie.setPath("/");
                        response.addCookie(cookie);

报下面错误

java.lang.IllegalArgumentException: An invalid character [34] was present in the Cookie value

查询ASCII码表发现34 对应的为 " 双引号，但是之前C#项目中添加同样的cookie是没问题的。

原因

跟踪源码发现问题出现在生成cookie的header字符串上

0CIRUU2`ZNNKH24MO4S{5ZB.png

进入源码发现是因为tomcat8.5以后 cookie的处理器由LegacyCookieProcessor 更改为了Rfc6265CookieProcessor

1.png

而在Rfc6265CookieProcessor中增加了对空格，双银号等特殊字符的校验

2.png

校验的代码为：

    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)));
            }
        }
    }

解决办法

1、降低tomcat版本
2、在tomcat中更改cookie处理器
3、重写generateHeader方法，去掉校验部分
新建CookieUtils工具类

import org.apache.tomcat.util.http.CookieProcessorBase;
import org.apache.tomcat.util.http.MimeHeaders;
import org.apache.tomcat.util.http.SameSiteCookies;
import org.apache.tomcat.util.http.ServerCookies;
import org.springframework.stereotype.Component;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import java.nio.charset.Charset;
import java.text.FieldPosition;
import java.util.Date;

@Component
public class CookieUtils extends CookieProcessorBase {

    @Override
    public void parseCookieHeader(MimeHeaders headers, ServerCookies serverCookies) {

    }

    @Override
    public String generateHeader(Cookie cookie) {
        return null;
    }

    @Override
    public String generateHeader(Cookie cookie, HttpServletRequest request) {
        // Can't use StringBuilder due to DateFormat
        StringBuffer header = new StringBuffer();

        // TODO: Name validation takes place in Cookie and cannot be configured
        //       per Context. Moving it to here would allow per Context config
        //       but delay validation until the header is generated. However,
        //       the spec requires an IllegalArgumentException on Cookie
        //       generation.
        header.append(cookie.getName());
        header.append('=');
        String value = cookie.getValue();
        if (value != null && value.length() > 0) {
            header.append(value);
        }

        // RFC 6265 prefers Max-Age to Expires but... (see below)
        int maxAge = cookie.getMaxAge();
        if (maxAge > -1) {
            // Negative Max-Age is equivalent to no Max-Age
            header.append("; Max-Age=");
            header.append(maxAge);

            // Microsoft IE and Microsoft Edge don't understand Max-Age so send
            // expires as well. Without this, persistent cookies fail with those
            // browsers. See http://tomcat.markmail.org/thread/g6sipbofsjossacn

            // Wdy, DD-Mon-YY HH:MM:SS GMT ( Expires Netscape format )
            header.append ("; Expires=");
            // To expire immediately we need to set the time in past
            if (maxAge == 0) {
                header.append(ANCIENT_DATE);
            } else {
                COOKIE_DATE_FORMAT.get().format(
                        new Date(System.currentTimeMillis() + maxAge * 1000L),
                        header,
                        new FieldPosition(0));
            }
        }

        String domain = cookie.getDomain();
        if (domain != null && domain.length() > 0) {
            header.append("; Domain=");
            header.append(domain);
        }

        String path = cookie.getPath();
        if (path != null && path.length() > 0) {
            header.append("; Path=");
            header.append(path);
        }

        if (cookie.getSecure()) {
            header.append("; Secure");
        }

        if (cookie.isHttpOnly()) {
            header.append("; HttpOnly");
        }

        SameSiteCookies sameSiteCookiesValue = getSameSiteCookies();

        if (!sameSiteCookiesValue.equals(SameSiteCookies.UNSET)) {
            header.append("; SameSite=");
            header.append(sameSiteCookiesValue.getValue());
        }

        return header.toString();
    }

    @Override
    public Charset getCharset() {
        return null;
    }
}

添加cookie时自己写入set-cookie

                        // 设置登录状态cookie
                        Cookie cookie = new Cookie("loginStatus",JSON.toJSONString(loginStatus));
                        cookie.setMaxAge(minutes * 60);
                        cookie.setDomain("cnki.net");
                        cookie.setPath("/");
                        String cookieStr = cookieUtils.generateHeader(cookie, request);
                        response.addHeader("set-cookie",cookieStr);