flying-hero
96f6318101
新增: - backend/venv/ - Python 虚拟环境 - backend/start.sh - 启动脚本（使用虚拟环境） - backend/requirements.txt - 依赖列表 - .gitignore - 忽略虚拟环境和缓存文件 说明: - 每个项目使用独立虚拟环境 - 避免依赖冲突 - 启动脚本自动创建和激活虚拟环境
52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
/**
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* Module dependencies.
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*/
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var crypto = require('crypto');
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/**
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* Sign the given `val` with `secret`.
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*
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* @param {String} val
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* @param {String|NodeJS.ArrayBufferView|crypto.KeyObject} secret
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* @return {String}
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* @api private
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*/
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exports.sign = function(val, secret){
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if ('string' !== typeof val) throw new TypeError("Cookie value must be provided as a string.");
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if (null == secret) throw new TypeError("Secret key must be provided.");
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return val + '.' + crypto
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.createHmac('sha256', secret)
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.update(val)
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.digest('base64')
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.replace(/\=+$/, '');
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};
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/**
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* Unsign and decode the given `val` with `secret`,
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* returning `false` if the signature is invalid.
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*
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* @param {String} val
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* @param {String|NodeJS.ArrayBufferView|crypto.KeyObject} secret
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* @return {String|Boolean}
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* @api private
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*/
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exports.unsign = function(val, secret){
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if ('string' !== typeof val) throw new TypeError("Signed cookie string must be provided.");
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if (null == secret) throw new TypeError("Secret key must be provided.");
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var str = val.slice(0, val.lastIndexOf('.'))
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, mac = exports.sign(str, secret);
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return sha1(mac) == sha1(val) ? str : false;
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};
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/**
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* Private
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*/
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function sha1(str){
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return crypto.createHash('sha1').update(str).digest('hex');
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}
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