js产生sessionid

// 生成一个随机的sessionID
function generateSessionID() {
    return Math.random().toString(36).substr(2) + Math.random().toString(36).substr(2);
}

// 设置sessionID到Cookie
function setSessionID(sessionID) {
    document.cookie = `sessionID=${sessionID}; path=/; max-age=3600`; // 设置有效期为1小时
}

// 获取sessionID
function getSessionID() {
    const name = 'sessionID=';
    const decodedCookie = decodeURIComponent(document.cookie);
    const ca = decodedCookie.split(';');
    for(let i = 0; i <ca.length; i++) {
        let c = ca[i];
        while (c.charAt(0) == ' ') {
            c = c.substring(1);
        }
        if (c.indexOf(name) == 0) {
            return c.substring(name.length, c.length);
        }
    }
    return "";
}

// 使用示例
const newSessionID = generateSessionID();
setSessionID(newSessionID);
console.log("Generated Session ID:", newSessionID);
console.log("Retrieved Session ID:", getSessionID());