Nginx+IIS+Redis 处理Session共享问题 1
Posted ___Burt
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最近遇到一个棘手的问题，微信公众平台的前端站点session老是丢失，我们是走的微信网页授权，授权后获取用户openid，丢失后没有openid后续的操作全白搭了，因为没了openid只能判断为客户不是在微信端访问进行提示，
然后接连收到客服中心回馈问题，不过全是安卓客户端的ios的完全没有（真邪门了），哎，秉着有问题就要解决的态度，开搞吧！
我们前端有六台Windows server 2012，部署的IIS站点，用A10做的硬负载，之前openid都是作为url参数各个page进行传递的，领导有意见，因为作为url参数的话微信的分享功能可以把整段链接分享出去，后来我们把分享按钮屏蔽掉了，不过效果还是不太好，手微信页面加载慢的时候屏蔽的js还没生效还是能复制到链接什么的，后来改成了session，所以考虑到应该在请求分发下六台服务器session没同步导致的！
之前也看过写关于分布式下session的问题，然后自己也想了想，试着用redis+Cookie的方案来试下，这个方案也有两种用法，目前只使用了第一种，第二种是为了防止第一种失败考虑的，下面大概先说下方案。
用户授权后，任意站点拿到openid后生成guid作为sessionId 写到cookie, 然后将sessionId+自定义key作为rediskey,然后将openid作为redisvalue写入redis，redis跟cookie的写入都是有时效性的，如果中途请求分发到别的服务器就直接拿cookie然后组装rediskey去查询，如果没有那就认为客户不是正常手段进入页面的，如果有就拿openid进行下面业务操作，见图：
两种方案大体相同，方案二只是考虑如果cookie不能写的话继续采取url参数传递，redis 的key有过期策略，就算分享出去也是一定时间内有效。
下面给出代码：
首先建站点 SessionManagerDemo Default页面就是简单的 get set
protected void Page_Load(object sender, EventArgs e) { SessionHelper sessionHelper = new SessionHelper(); sessionHelper["test123"] = "session 共享测试！"; Response.Write("session:" + sessionHelper["test123"]); }
建类库 SessionManager 这里用的是StackExchange.Redis 园里有写介绍文章还有使用demo 我也是找了个自己试试，感觉挺好，代码贴出来大家可以自己试着看看
首先是 RedisConnectionHelp.cs
/// <summary> /// ConnectionMultiplexer对象管理帮助类 /// </summary> public static class RedisConnectionHelp { //系统自定义Key前缀 public static readonly string SysCustomKey = ConfigurationManager.AppSettings["redisKey"] ?? ""; //"127.0.0.1:6379,allowadmin=true private static readonly string RedisConnectionString = ConfigurationManager.ConnectionStrings["RedisExchangeHosts"].ConnectionString; private static readonly object Locker = new object(); private static ConnectionMultiplexer _instance; private static readonly ConcurrentDictionary<string, ConnectionMultiplexer> ConnectionCache = new ConcurrentDictionary<string, ConnectionMultiplexer>(); /// <summary> /// 单例获取 /// </summary> public static ConnectionMultiplexer Instance { get { if (_instance == null) { lock (Locker) { if (_instance == null || !_instance.IsConnected) { _instance = GetManager(); } } } return _instance; } } /// <summary> /// 缓存获取 /// </summary> /// <param name="connectionString"></param> /// <returns></returns> public static ConnectionMultiplexer GetConnectionMultiplexer(string connectionString) { if (!ConnectionCache.ContainsKey(connectionString)) { ConnectionCache[connectionString] = GetManager(connectionString); } return ConnectionCache[connectionString]; } private static ConnectionMultiplexer GetManager(string connectionString = null) { connectionString = connectionString ?? RedisConnectionString; var connect = ConnectionMultiplexer.Connect(connectionString); //注册如下事件 connect.ConnectionFailed += MuxerConnectionFailed; connect.ConnectionRestored += MuxerConnectionRestored; connect.ErrorMessage += MuxerErrorMessage; connect.ConfigurationChanged += MuxerConfigurationChanged; connect.HashSlotMoved += MuxerHashSlotMoved; connect.InternalError += MuxerInternalError; return connect; } #region 事件 /// <summary> /// 配置更改时 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private static void MuxerConfigurationChanged(object sender, EndPointEventArgs e) { Console.WriteLine("Configuration changed: " + e.EndPoint); } /// <summary> /// 发生错误时 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private static void MuxerErrorMessage(object sender, RedisErrorEventArgs e) { Console.WriteLine("ErrorMessage: " + e.Message); } /// <summary> /// 重新建立连接之前的错误 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private static void MuxerConnectionRestored(object sender, ConnectionFailedEventArgs e) { Console.WriteLine("ConnectionRestored: " + e.EndPoint); } /// <summary> /// 连接失败 ， 如果重新连接成功你将不会收到这个通知 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private static void MuxerConnectionFailed(object sender, ConnectionFailedEventArgs e) { Console.WriteLine("重新连接：Endpoint failed: " + e.EndPoint + ", " + e.FailureType + (e.Exception == null ? "" : (", " + e.Exception.Message))); } /// <summary> /// 更改集群 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private static void MuxerHashSlotMoved(object sender, HashSlotMovedEventArgs e) { Console.WriteLine("HashSlotMoved:NewEndPoint" + e.NewEndPoint + ", OldEndPoint" + e.OldEndPoint); } /// <summary> /// redis类库错误 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private static void MuxerInternalError(object sender, InternalErrorEventArgs e) { Console.WriteLine("InternalError:Message" + e.Exception.Message); } #endregion 事件 }
然后 RedisHelper 实际操作类 这里 string、hash、list、SortedSet等等的一些操作全有了，同步的异步的也是满满的
/// <summary> /// Redis操作 /// </summary> public class RedisHelper { private int DbNum { get; set; } private readonly ConnectionMultiplexer _conn; public string CustomKey; #region 构造函数 public RedisHelper(int dbNum = 0) : this(dbNum, null) { } public RedisHelper(int dbNum, string readWriteHosts) { DbNum = dbNum; _conn = string.IsNullOrWhiteSpace(readWriteHosts) ? RedisConnectionHelp.Instance : RedisConnectionHelp.GetConnectionMultiplexer(readWriteHosts); } #endregion 构造函数 #region String #region 同步方法 /// <summary> /// 保存单个key value /// </summary> /// <param name="key">Redis Key</param> /// <param name="value">保存的值</param> /// <param name="expiry">过期时间</param> /// <returns></returns> public bool StringSet(string key, string value, TimeSpan? expiry = default(TimeSpan?)) { key = AddSysCustomKey(key); return Do(db => db.StringSet(key, value, expiry)); } /// <summary> /// 保存多个key value /// </summary> /// <param name="keyValues">键值对</param> /// <returns></returns> public bool StringSet(List<KeyValuePair<RedisKey, RedisValue>> keyValues) { List<KeyValuePair<RedisKey, RedisValue>> newkeyValues = keyValues.Select(p => new KeyValuePair<RedisKey, RedisValue>(AddSysCustomKey(p.Key), p.Value)).ToList(); return Do(db => db.StringSet(newkeyValues.ToArray())); } /// <summary> /// 保存一个对象 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="key"></param> /// <param name="obj"></param> /// <param name="expiry"></param> /// <returns></returns> public bool StringSet<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?)) { key = AddSysCustomKey(key); string json = ConvertJson(obj); return Do(db => db.StringSet(key, json, expiry)); } /// <summary> /// 获取单个key的值 /// </summary> /// <param name="key">Redis Key</param> /// <returns></returns> public string StringGet(string key) { key = AddSysCustomKey(key); return Do(db => db.StringGet(key)); } /// <summary> /// 获取多个Key /// </summary> /// <param name="listKey">Redis Key集合</param> /// <returns></returns> public RedisValue[] StringGet(List<string> listKey) { List<string> newKeys = listKey.Select(AddSysCustomKey).ToList(); return Do(db => db.StringGet(ConvertRedisKeys(newKeys))); } /// <summary> /// 获取一个key的对象 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="key"></param> /// <returns></returns> public T StringGet<T>(string key) { key = AddSysCustomKey(key); return Do(db => ConvertObj<T>(db.StringGet(key))); } /// <summary> /// 为数字增长val /// </summary> /// <param name="key"></param> /// <param name="val">可以为负</param> /// <returns>增长后的值</returns> public double StringIncrement(string key, double val = 1) { key = AddSysCustomKey(key); return Do(db => db.StringIncrement(key, val)); } /// <summary> /// 为数字减少val /// </summary> /// <param name="key"></param> /// <param name="val">可以为负</param> /// <returns>减少后的值</returns> public double StringDecrement(string key, double val = 1) { key = AddSysCustomKey(key); return Do(db => db.StringDecrement(key, val)); } #endregion 同步方法 #region 异步方法 /// <summary> /// 保存单个key value /// </summary> /// <param name="key">Redis Key</param> /// <param name="value">保存的值</param> /// <param name="expiry">过期时间</param> /// <returns></returns> public async Task<bool> StringSetAsync(string key, string value, TimeSpan? expiry = default(TimeSpan?)) { key = AddSysCustomKey(key); return await Do(db => db.StringSetAsync(key, value, expiry)); } /// <summary> /// 保存多个key value /// </summary> /// <param name="keyValues">键值对</param> /// <returns></returns> public async Task<bool> StringSetAsync(List<KeyValuePair<RedisKey, RedisValue>> keyValues) { List<KeyValuePair<RedisKey, RedisValue>> newkeyValues = keyValues.Select(p => new KeyValuePair<RedisKey, RedisValue>(AddSysCustomKey(p.Key), p.Value)).ToList(); return await Do(db => db.StringSetAsync(newkeyValues.ToArray())); } /// <summary> /// 保存一个对象 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="key"></param> /// <param name="obj"></param> /// <param name="expiry"></param> /// <returns></returns> public async Task<bool> StringSetAsync<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?)) { key = AddSysCustomKey(key); string json = ConvertJson(obj); return await Do(db => db.StringSetAsync(key, json, expiry)); } /// <summary> /// 获取单个key的值 /// </summary> /// <param name="key">Redis Key</param> /// <returns></returns> public async Task<string> StringGetAsync(string key) { key = AddSysCustomKey(key); return await Do(db => db.StringGetAsync(key)); } /// <summary> /// 获取多个Key /// </summary> /// <param name="listKey">Redis Key集合</param> /// <returns></returns> public async Task<RedisValue[]> StringGetAsync(List<string> listKey) { List<string> newKeys = listKey.Select(AddSysCustomKey).ToList(); return await Do(db => db.StringGetAsync(ConvertRedisKeys(newKeys))); } /// <summary> /// 获取一个key的对象 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="key"></param> /// <returns></returns> public async Task<T> StringGetAsync<T>(string key) { key = AddSysCustomKey(key); string result = await Do(db => db.StringGetAsync(key)); return ConvertObj<T>(result); } /// <summary> /// 为数字增长val /// </summary> /// <param name="key"></param> /// <param name="val">可以为负</param> /// <returns>增长后的值</returns> public async Task<double> StringIncrementAsync(string key, double val = 1) { key = AddSysCustomKey(key); return await Do(db => db.StringIncrementAsync(key, val)); } /// <summary> /// 为数字减少val /// </summary> /// <param name="key"></param> /// <param name="val">可以为负</param> /// <returns>减少后的值</returns> public async Task<double> StringDecrementAsync(string key, double val = 1) { key = AddSysCustomKey(key); return await Do(db => db.StringDecrementAsync(key, val)); } #endregion 异步方法 #endregion String #region Hash #region 同步方法 /// <summary> /// 判断某个数据是否已经被缓存 /// </summary> /// <param name="key"></param> /// <param name="dataKey"></param> /// <returns></returns> public bool HashExists(string key, string dataKey) { key = AddSysCustomKey(key); return Do(db => db.HashExists(key, dataKey)); } /// <summary> /// 存储数据到hash表 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="key"></param> /// <param name="dataKey"></param> /// <param name="t"></param> /// <returns></returns> public bool HashSet<T>(string key, string dataKey, T t) { key = AddSysCustomKey(key); return Do(db => { string json = ConvertJson(t); return db.HashSet(key, dataKey, json); }); } /// <summary> /// 移除hash中的某值 /// </summary> /// <param name="key"></param> /// <param name="dataKey"></param> /// <returns></returns> public bool HashDelete(string key, string dataKey) { key = AddSysCustomKey(key); return Do(db => db.HashDelete(key, dataKey)); } /// <summary> /// 移除hash中的多个值 /// </summary> /// <param name="key"></param> /// <param name="dataKeys"></param> /// <returns></returns> public long HashDelete(string key, List<RedisValue> dataKeys) { key = AddSysCustomKey(key); //List<RedisValue> dataKeys1 = new List<RedisValue>() {"1","2"}; return Do(db => db.HashDelete(key, dataKeys.ToArray())); } /// <summary> /// 从hash表获取数据 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="key"></param> /// <param name="dataKey"></param> /// <returns></returns> public T HashGet<T>(string key, string dataKey) { key = AddSysCustomKey(key); return Do(db => { string value = db.HashGet(key, dataKey); return ConvertObj<T>(value); }); } /// <summary> /// 为数字增长val /// </summary> /// <param name="key"></param> /// <param name="dataKey"></param> /// <param name="val">可以为负</param> /// <returns>增长后的值</returns> public double HashIncrement(string key, string dataKey, double val = 1) { key = AddSysCustomKey(key); return Do(db => db.HashIncrement(key, dataKey, val)); } /// <summary> /// 为数字减少val /// </summary> /// <param name="key"></param> /// <param name="dataKey"></param> /// <param name="val">可以为负</param> /// <returns>减少后的值</returns> public double HashDecrement(string key, string dataKey, double val = 1) { key = AddSysCustomKey(key); return Do(db => db.HashDecrement(key, dataKey, val)); } /// <summary> /// 获取hashkey所有Redis key /// </summary> /// <typeparam name="T"></typeparam> /// <param name="key"></param> /// <returns></returns> public List<T> HashKeys<T>(string key) { key = AddSysCustomKey(key); return Do(db => { RedisValue[] values = db.HashKeys(key); return ConvetList<T>(values); }); } #endregion 同步方法 windows+nginx+iis+redis+Task.MainForm构建分布式架构 之 (nginx+iis构建服务集群)