1.如何维护代理IP库？想要使用代理IP，那就必须有一个一定数量、足够有效的代理ip库，在学习阶段，随便玩玩那就只能从免费的代理IP网站上抓取,没有一定数量的代理刷文章流浪量非常慢，首先就是要维护好自己的代理Ip库 之前用过的西刺代理、66ip比较靠谱，西祠好像有反扒，遇到过一次，不知道是西祠网站的问题还是反扒的策略，这两个网站每分钟抓取的能用的代理大概有2,3个,这已经算的上比较客观的了， data5u、快代理、ip3366网页端更新的非常少，而且有效性比较低，快代理抓取网页还必须设置Useragent,发现设置后获取的ip的端口和网页端不一致，很玩味是吧，没办法免费的就是这样，不然人家就收费了，当然付费的代理也不稳定，但肯定是比免费的好很多。
2.反爬虫的一些常见的机制？反爬虫的原则就是判断是否是一个真实的用户，一些比较重要的数据会利用多种机制混合，让爬虫的代价变大甚至无法爬取,Header里面的字段设置、IP限制、Cookie等
3.使用代理IP刷新csdn文章的浏览量csdn文章的浏览量还是比较好刷的，前提的是你有足够多的代理，没有更多的代理效率会非常慢。前面一篇文章我们已经从几个免费的代理网站抓取了代理，这里就不多做介绍了，这里我们接着上一篇的拿来就用。c#批量抓取免费代理并验证有效性1.我使用的多线程批量发送请求，效率更好，每个线程平均分配一定数量的代理执行请求。2.定时获取Redis中代理3.使用System.Collections.Concurrent 命名空间下ConcurrentDictionary字典集合来统计失败的次数，如果达到一定次数就直接从库中删除该代理。关于代码中主要功能是实现，不足的地方就是代理太少，效率不高。 主要代码如下： class Program
{
static bool finishIsCompleted=true;
static ConcurrentDictionary<string, int> failStatis;//保存请求失败的ip地址:key 失败次数：value
static string refreshLink = "https://blog.csdn.net/baijifeilong/article/details/80734388";
static string requestSuccessKey,requestFailKey;
static async Task Main(string[] args)
{
ThreadPool.SetMinThreads(500, 100);
failStatis = new ConcurrentDictionary<string, int>();
requestSuccessKey = "list_request_success"+DateTime.Now.ToString("hhmm");
requestFailKey = "list_request_fail" + DateTime.Now.ToString("hhmm");
Timer timer = new Timer(async (state) =>
{ if (finishIsCompleted)
{
finishIsCompleted = false; //获取代理 var proxyIps = RedisHelper.GetProxy();
int threadCount = 1; if (proxyIps.Count > 10)
{
threadCount = proxyIps.Count / 10;
} //平均分配给每个thread执行15个请求
int requestCount = proxyIps.Count / threadCount; for (var i = 0; i < threadCount; i++)
{ var tempList = proxyIps.GetRange(i * requestCount, requestCount); if (i == threadCount - 1)
{
tempList.AddRange(proxyIps.GetRange(threadCount * requestCount, proxyIps.Count - threadCount * requestCount));
}
Thread thread = new Thread(async () =>
{ //执行发起请求
await Finish(tempList);
});
thread.Start();
}
}
}, "processing timer event", 0, 1000*30); Console.ReadLine();
} public static async Task Finish(List<string> proxyIps)
{ for (int i = 0; i < proxyIps.Count; i++)
{ string ip = proxyIps[i]; int index = ip.IndexOf(":"); string ipAddress = ip.Substring(0, index); int ipPort = int.Parse(ip.Substring(index + 1));
//随机休眠 Thread.Sleep(new Random().Next(1,4)*1000); await Get(ipAddress, ipPort, 10000, randomUseragent(), refreshLink, () =>
{
RedisHelper.AddRequestOk(requestSuccessKey,ip+" "+DateTime.Now.ToShortTimeString(),true);
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine(ip+" success");
},
(error) =>
{
RedisHelper.AddRequestOk(requestFailKey, ip + " " + DateTime.Now.ToShortTimeString(),false);
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine(ipAddress+error+"失败"+(failStatis.ContainsKey(ip)?failStatis[ip] :1)+"次"); if (failStatis.ContainsKey(ip))
{ if (failStatis[ip] == 6)
{
RedisHelper.RemoveSetValue(ip);
} else
failStatis[ip]++;
} else
{
failStatis.AddOrUpdate(ip, 1,(key,oldValue)=>oldValue+1);
}
}
);
} finishIsCompleted = true;
} private static string randomUseragent()
{ string[] usersagents = new string[] {
"Mozilla/5.0 (Linux; U; Android 2.3.7; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",
"MQQBrowser/26 Mozilla/5.0 (Linux; U; Android 2.3.7; zh-cn; MB200 Build/GRJ22; CyanogenMod-7) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",
"JUC (Linux; U; 2.3.7; zh-cn; MB200; 320*480) UCWEB7.9.3.103/139/999",
"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0a1) Gecko/20110623 Firefox/7.0a1 Fennec/7.0a1",
"Opera/9.80 (Android 2.3.4; Linux; Opera Mobi/build-1107180945; U; en-GB) Presto/2.8.149 Version/11.10",
"Mozilla/5.0 (Linux; U; Android 3.0; en-us; Xoom Build/HRI39) AppleWebKit/534.13 (KHTML, like Gecko) Version/4.0 Safari/534.13",
"Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/1A542a Safari/419.3",
"Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7",
"Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10",
"Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, like Gecko) Version/6.0.0.337 Mobile Safari/534.1+",
"Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.0; U; en-US) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 TouchPad/1.0",
"Mozilla/5.0 (SymbianOS/9.4; Series60/5.0 NokiaN97-1/20.0.019; Profile/MIDP-2.1 Configuration/CLDC-1.1) AppleWebKit/525 (KHTML, like Gecko) BrowserNG/7.1.18124",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0; HTC; Titan)",
"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36",
"Mozilla/5.0 (X11; U; Linux x86_64; zh-CN; rv:1.9.2.10) Gecko/20100922 Ubuntu/10.10 (maverick) Firefox/3.6.10",
"Mozilla/5.0 (Windows NT 5.1; U; en; rv:1.8.1) Gecko/20061208 Firefox/2.0.0 Opera 9.50",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.57.2 (KHTML, like Gecko) Version/5.1.7 Safari/534.57.2",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; LBBROWSER) ",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; QQBrowser/7.0.3698.400)",
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.122 UBrowser/4.0.3214.0 Safari/537.36",
"Mozilla/5.0 (Linux; U; Android 2.2.1; zh-cn; HTC_Wildfire_A3333 Build/FRG83D) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",
"Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, like Gecko) Version/6.0.0.337 Mobile Safari/534.1+",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0; HTC; Titan)",
"Mozilla/4.0 (compatible; MSIE 6.0; ) Opera/UCWEB7.0.2.37/28/999",
"Openwave/ UCWEB7.0.2.37/28/999",
"NOKIA5700/ UCWEB7.0.2.37/28/999",
"UCWEB7.0.2.37/28/999",
"Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.0; U; en-US) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 TouchPad/1.0",
"Mozilla/5.0 (Linux; U; Android 3.0; en-us; Xoom Build/HRI39) AppleWebKit/534.13 (KHTML, like Gecko) Version/4.0 Safari/534.13",
"Opera/9.80 (Android 2.3.4; Linux; Opera Mobi/build-1107180945; U; en-GB) Presto/2.8.149 Version/11.10",
"Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5",
}; Random random = new Random(); var randomNumber = random.Next(0, usersagents.Length); return usersagents[randomNumber];
} public static async Task Get(string proxyIp, int proxyPort,int timeout, string randomUseragent, string url, Action success, Action<string> fail)
{ HttpWebRequest request = null; HttpWebResponse response = null; try
{ request = (HttpWebRequest)WebRequest.Create(url); request.Timeout = timeout; request.UserAgent = randomUseragent; request.Proxy = new WebProxy(proxyIp,proxyPort); response = await request.GetResponseAsync() as HttpWebResponse; if (response.StatusCode == HttpStatusCode.OK)
{ success();
} else
{ fail(response+":"+response.StatusDescription);
}
} catch (Exception ex)
{ fail(ex.Message.ToString());
} finally
{ if (request != null)
{ request.Abort(); request = null;
} if (response != null)
{ response.Close(); response = null;
}
}
}
}redisHelper.cs public class RedisHelper
{ private static readonly object Locker = new object(); private static ConnectionMultiplexer _redis; private const string CONNECTTIONSTRING = "127.0.0.1:6379,DefaultDatabase=3"; public const string REDIS_SET_KET_SUCCESS = "set_success_ip"; private static ConnectionMultiplexer Manager
{ get
{ if (_redis == null)
{ lock (Locker)
{ if (_redis != null) return _redis;
_redis = GetManager(); return _redis;
}
} return _redis;
}
} private static ConnectionMultiplexer GetManager(string connectionString = null)
{ if (string.IsNullOrEmpty(connectionString))
{
connectionString = CONNECTTIONSTRING;
} return ConnectionMultiplexer.Connect(connectionString);
} public static void AddRequestOk(string key,string value,bool isSuccess)
{ var db = Manager.GetDatabase(); if(isSuccess)
db.ListLeftPush(key,value); else
db.ListLeftPush(key, value);
} public static List<string> GetProxy()
{
List<string> result = new List<string>(); var db = Manager.GetDatabase(); var values = db.SetMembers(REDIS_SET_KET_SUCCESS); foreach (var value in values)
{
result.Add(value.ToString());
} return result;
} public static bool InsertSet(string value)
{ var db = Manager.GetDatabase(); return db.SetAdd(REDIS_SET_KET_SUCCESS, value);
} public static bool RemoveSetValue(string value)
{ var db = Manager.GetDatabase(); return db.SetRemove(REDIS_SET_KET_SUCCESS,value);
}
}
原文：C#使用代理刷新csdn文章浏览量 |
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来自： dotNet全栈开发 > 《待分类》
昨天晚上看了篇文章，故事很强大，警惕挂着开源的招牌到处坑蒙拐骗的垃圾项目，比如iBase4J，所以就找到原博主在csdn的这篇文章曝光北京一家不发工资的流氓公司南充巴蜀文化，老板叫万明，刷的时间不短，主要是因为代理太少了。 
