/// <summary>
/// 获取正确的代理ip
/// </summary>
/// <param name="Param">爬取参数</param>
/// <returns>正确的代理ip</returns>
public static string GetCorrectIP(ProxyParam Param)
{
string ProxyIp = string.Empty;
string tempProxyIp = string.Empty;
//当前页
int currentPage = 1;
int PageSize = 100;
while (string.IsNullOrEmpty(ProxyIp))
{
//从数据库取
string strSQL = string.Format(@"SELECT IP,Port FROM (
SELECT IP,Port,ROW_NUMBER() OVER(ORDER BY Speed) AS Num FROM dbo.p_IPProxy WHERE Type='HTTP' AND ProxyIp NOT IN(SELECT ProxyIP FROM dbo.p_ProxyIPUseHistory WHERE Type='IpProxyJob' AND CreateDay=CONVERT(VARCHAR(10),GETDATE(),120))
) AS A
WHERE Num BETWEEN {0} AND {1}", (currentPage - 1) * PageSize + 1, currentPage * PageSize);
DataTable dt = SQLHelper.FillDataTable(strSQL);
if (dt == null || dt.Rows.Count == 0)
{
break;
}
foreach (DataRow dr in dt.Rows)
{
tempProxyIp = GetIP(dr["IP"].ToString(), dr["Port"].ToString());
LogHelper.WriteLog("当前IP:" + tempProxyIp);
if (Ping(dr["IP"].ToString()) && GetTotalPage(Param.IPUrl, tempProxyIp) > 1)
{
ProxyIp = tempProxyIp;
break;
}
}
currentPage++;
}
if (string.IsNullOrEmpty(ProxyIp))
{
ProxyIp = Param.DefaultProxyIp;
}
return(ProxyIp);
}
public static List <IPProxy> ParseProxy(ProxyParam Param)
{
if (string.IsNullOrEmpty(Param.IPUrl))
{
throw new ArgumentNullException("ParseProxy函数参数空异常");
}
//总页数
int total = GetTotalPage(Param.IPUrl, Param.ProxyIp);
//返回结果
List <IPProxy> list = new List <IPProxy>();
//多线程进行解析获取
List <Thread> listThread = new List <Thread>();
//每个线程需要解析的页面数量
int threadPqgeSize = (total / CPUCount) + 1;
int count = 0;
//为每个线程准备参数
List <Hashtable> threadParams = new List <Hashtable>();
int start, end;
Hashtable table = null;
for (int i = 0; i < CPUCount; i++)
{
start = i * threadPqgeSize + 1;
if (i == CPUCount - 1)
{
end = total;
}
else
{
end = start + threadPqgeSize;
}
table = new Hashtable();
table.Add("start", start);
table.Add("end", end);
table.Add("list", list);
table.Add("param", Param);
threadParams.Add(table);
count += threadPqgeSize;
}
for (int i = 1; i < CPUCount; i++)
{
Thread thread = new Thread(DoWork);
thread.IsBackground = true;
thread.Name = "PageParse #" + i.ToString();
listThread.Add(thread);
thread.Start(threadParams[i]);
}
// 为当前线程指派生成任务。
DoWork(threadParams[0]);
// 等待所有的编译线程执行线束。
foreach (Thread thread in listThread)
{
thread.Join();
}
if (list.Count == 0)
{
LogHelper.WriteLog("爬虫-代理ip任务", new Exception("没有获取到数据,可能当前ip(" + Param.ProxyIp + ")已被服务器封锁"));
}
else
{
BatchSaveData(list);
}
return(list);
}
public static List<IPProxy> ParseProxy(ProxyParam Param)
{
if (string.IsNullOrEmpty(Param.IPUrl))
{
throw new ArgumentNullException("ParseProxy函数参数空异常");
}
//总页数
int total = GetTotalPage(Param.IPUrl, Param.ProxyIp);
//返回结果
List<IPProxy> list = new List<IPProxy>();
//多线程进行解析获取
List<Thread> listThread = new List<Thread>();
//每个线程需要解析的页面数量
int threadPqgeSize = (total / CPUCount) + 1;
int count = 0;
//为每个线程准备参数
List<Hashtable> threadParams = new List<Hashtable>();
int start, end;
Hashtable table = null;
for (int i = 0; i < CPUCount; i++)
{
start = i * threadPqgeSize + 1;
if (i == CPUCount - 1)
{
end = total;
}
else
{
end = start + threadPqgeSize;
}
table = new Hashtable();
table.Add("start", start);
table.Add("end", end);
table.Add("list", list);
table.Add("param", Param);
threadParams.Add(table);
count += threadPqgeSize;
}
for (int i = 1; i < CPUCount; i++)
{
Thread thread = new Thread(DoWork);
thread.IsBackground = true;
thread.Name = "PageParse #" + i.ToString();
listThread.Add(thread);
thread.Start(threadParams[i]);
}
// 为当前线程指派生成任务。
DoWork(threadParams[0]);
// 等待所有的编译线程执行线束。
foreach (Thread thread in listThread)
{
thread.Join();
}
if (list.Count == 0)
{
TaskLog.IpProxyLogInfo.WriteLogE("爬虫-代理ip任务", new Exception("没有获取到数据,可能当前ip(" + Param.ProxyIp + ")已被服务器封锁"));
}
else
{
BatchSaveData(list);
}
return list;
}
/// <summary>
/// 解析每一页数据
/// </summary>
/// <param name="param"></param>
private static void DoWork(object param)
{
//参数还原
Hashtable table = param as Hashtable;
int start = Convert.ToInt32(table["start"]);
int end = Convert.ToInt32(table["end"]);
List <IPProxy> list = table["list"] as List <IPProxy>;
ProxyParam Param = table["param"] as ProxyParam;
//页面地址
string url = string.Empty;
string ip = string.Empty;
IPProxy item = null;
HtmlNodeCollection nodes = null;
HtmlNode node = null;
HtmlAttribute atr = null;
for (int i = start; i <= end; i++)
{
LogHelper.WriteLog(string.Format("开始解析,页码{0}~{1},当前页码{2}", start, end, i));
url = string.Format("{0}/{1}", Param.IPUrl, i);
var doc = new HtmlDocument();
doc.LoadHtml(GetHTML(url, Param.ProxyIp));
//获取所有数据节点tr
var trs = doc.DocumentNode.SelectNodes(@"//table[@id='ip_list']/tr");
if (trs != null && trs.Count > 1)
{
LogHelper.WriteLog(string.Format("当前页码{0},请求地址{1},共{2}条数据", i, url, trs.Count));
for (int j = 1; j < trs.Count; j++)
{
nodes = trs[j].SelectNodes("td");
if (nodes != null && nodes.Count > 9)
{
ip = nodes[2].InnerText.Trim();
if (Param.IsPingIp && !Ping(ip))
{
continue;
}
//有效的IP才添加
item = new IPProxy();
node = nodes[1].FirstChild;
if (node != null)
{
atr = node.Attributes["alt"];
if (atr != null)
{
item.Country = atr.Value.Trim();
}
}
item.IP = ip;
item.Port = nodes[3].InnerText.Trim();
item.ProxyIp = GetIP(item.IP, item.Port);
item.Position = nodes[4].InnerText.Trim();
item.Anonymity = nodes[5].InnerText.Trim();
item.Type = nodes[6].InnerText.Trim();
node = nodes[7].SelectSingleNode("div[@class='bar']");
if (node != null)
{
atr = node.Attributes["title"];
if (atr != null)
{
item.Speed = atr.Value.Trim();
}
}
node = nodes[8].SelectSingleNode("div[@class='bar']");
if (node != null)
{
atr = node.Attributes["title"];
if (atr != null)
{
item.ConnectTime = atr.Value.Trim();
}
}
item.VerifyTime = nodes[9].InnerText.Trim();
list.Add(item);
}
}
LogHelper.WriteLog(string.Format("当前页码{0},共{1}条数据", i, trs.Count));
}
LogHelper.WriteLog(string.Format("结束解析,页码{0}~{1},当前页码{2}", start, end, i));
}
}
/// <summary>
/// 获取正确的代理ip
/// </summary>
/// <param name="Param">爬取参数</param>
/// <returns>正确的代理ip</returns>
public static string GetCorrectIP(ProxyParam Param)
{
string ProxyIp = string.Empty;
string tempProxyIp = string.Empty;
//当前页
int currentPage = 1;
int PageSize = 100;
while (string.IsNullOrEmpty(ProxyIp))
{
//从数据库取
string strSQL = string.Format(@"SELECT IP,Port FROM (
SELECT IP,Port,ROW_NUMBER() OVER(ORDER BY Speed) AS Num FROM dbo.p_IPProxy WHERE Type='HTTP' AND ProxyIp NOT IN(SELECT ProxyIP FROM dbo.p_ProxyIPUseHistory WHERE Type='IpProxyJob' AND CreateDay=CONVERT(VARCHAR(10),GETDATE(),120))
) AS A
WHERE Num BETWEEN {0} AND {1}", (currentPage - 1) * PageSize + 1, currentPage * PageSize);
DataTable dt = SQLHelper.FillDataTable(strSQL);
if (dt==null || dt.Rows.Count == 0)
{
break;
}
foreach (DataRow dr in dt.Rows)
{
tempProxyIp = GetIP(dr["IP"].ToString(), dr["Port"].ToString());
TaskLog.IpProxyLogInfo.WriteLogE("当前IP:" + tempProxyIp);
if (Ping(dr["IP"].ToString()) && GetTotalPage(Param.IPUrl, tempProxyIp) > 1)
{
ProxyIp = tempProxyIp;
break;
}
}
currentPage++;
}
if (string.IsNullOrEmpty(ProxyIp))
{
ProxyIp = Param.DefaultProxyIp;
}
return ProxyIp;
}