/// <summary>
/// 在派生类中重写此方法,以便在完成对一个Content处理之后进行处理
/// </summary>
/// <param name="content">Content</param>
/// <param name="context">ProcessContext</param>
protected virtual void OnProcessCompleted(Content content, ProcessContext context)
{
//
}
/// <summary>
/// 处理内容
/// </summary>
/// <param name="content">Content实例</param>
private void DoProcess(Content content)
{
if (null == this.settings.ContentHandlers && null == content.RawUrl.ContentHandlers)
{
return;
}
if (null == content)
{
return;
}
//排序处理程序集合
List<IContentHandler> handlers = new List<IContentHandler>();
foreach (IContentHandler h in this.settings.ContentHandlers)
{
if (null != h)
{
handlers.Add(h);
}
}
foreach (IContentHandler h in content.RawUrl.ContentHandlers)
{
if (null != h)
{
handlers.Add(h);
}
}
handlers.Sort(new ContentHandlerPriorityCompare());
ProcessContext context = new ProcessContext(this);
using (content)
{
//按照优先次序调用内容处理程序
foreach (IContentHandler handler in handlers)
{
handler.Process(content, context);
}
//处理完成后操作
this.OnProcessCompleted(content, context);
}
Thread.Sleep((int)this.settings.SpeedMode);
}
/// <summary>
/// 在派生类中重写此方法,以便在排队一个Content之前进行处理
/// </summary>
/// <param name="content">Content</param>
protected virtual void BeforeEnqueueContent(Content content)
{
//
}
/// <summary>
/// 在派生类中重写此方法,以便在Content下载完成进行处理
/// </summary>
/// <param name="content"></param>
protected virtual void OnContentLoaded(Content content)
{
//
}
/// <summary> /// 在派生类中重写此方法,从给定的内容中查找URL字符串 /// </summary> /// <param name="content">Content</param> /// <returns>IEnumerable(string)</returns> protected abstract IEnumerable<KeyValuePair<string, string>> FindUrls(Content content);
/// <summary>
/// 手动排队Content
/// </summary>
/// <param name="content">Content</param>
public void ManualQueue(Content content)
{
if (null == content)
{
return;
}
this.contentQueue.Add(content);
}
public void Process(Content content, ProcessContext context)
{
if (!(content is TextContent))
{
return;
}
content.SaveToFile(@"E:\SOUEX\tmp\" + content.RawUrl.GetRawParam("id")+".txt");
Console.WriteLine("提取Email From: {0}", content.RawUrl.GetUrl());
Match m = mReg.Match(((TextContent)content).Content);
if (null != m && m.Success)
{
string sql = String.Format("UPDATE users SET email='{0}' WHERE uid='{1}'", m.Value, content.RawUrl.GetRawParam("id"));
Console.WriteLine(sql);
db.ExecuteNonQuery(sql);
}
}
/// <summary>
/// 在派生类中重写此方法,实现URL的抽取
/// </summary>
/// <param name="content">Content</param>
/// <returns>IList</returns>
public IDictionary<uint, Url> Extract(Content content)
{
IEnumerable<KeyValuePair<string, string>> strUrls = this.FindUrls(content);
IDictionary<uint, Url> urls = new Dictionary<uint, Url>();
if (null == strUrls)
{
return urls;
}
Url holder = content.RawUrl;
Url url;
UrlRuler matchedRuler;
//遍历抽取到的URL
using (IEnumerator<KeyValuePair<string, string>> enm = strUrls.GetEnumerator())
{
while (enm.MoveNext())
{
matchedRuler = null;
//循环使用当前抽取器的URL规则来匹配当前的URL字符串,匹配成功则跳出循环,进一步处理
foreach (UrlRuler r in this.rulers)
{
if (r.IsMatch(enm.Current.Key))
{
matchedRuler = r;
break;
}
}
//进一步处理匹配到的URL
if (null != matchedRuler)
{
url = null;
try
{
switch (matchedRuler.UrlType)
{
case UrlTypes.Index:
if (Utils.IsAbsoluteUrlString(enm.Current.Key))
{
url = Url.CreateIndexUrl(enm.Current.Key);
}
else
{
url = Url.CreateIndexUrl(content.RawUrl.Uri.AbsoluteUri, enm.Current.Key);
}
break;
case UrlTypes.Final:
if (Utils.IsAbsoluteUrlString(enm.Current.Key))
{
url = Url.CreateFinalUrl(enm.Current.Key, holder);
}
else
{
url = Url.CreateFinalUrl(content.RawUrl.Uri.AbsoluteUri, enm.Current.Key, holder);
}
break;
}
}
catch (Exception e1)
{
Console.WriteLine("无法创建URL,错误:{0}, URL字符串:{1}", e1, enm.Current.Key);
continue;
}
//当URL无效,或者存在相同主机部分限制时
if (null == url || !url.IsValid || (this.OnlySameHost && !Url.IsSameHost(content.RawUrl, url)) || (this.OnlySameDomain && !Url.IsSameDomain(content.RawUrl, url)))
{
continue;
}
url.Text = enm.Current.Value;
//将匹配规则的属性赋予匹配的URL
url.HttpMethod = matchedRuler.HttpMethod;
url.AppendParams = matchedRuler.AppendParmas;
foreach (IContentHandler h in matchedRuler.ContentHandlers)
{
url.ContentHandlers.Add(h);
}
if (!urls.ContainsKey(url.CheckSum))
{
urls.Add(url.CheckSum, url);
}
}
}
}
return urls;
}
public void Process(Content content, ProcessContext context)
{
if (!(content is TextContent))
{
return;
}
//content.SaveToFile(Utils.GetAppPath() +"DATA\\"+ content.RawUrl.CheckSum+".txt");
StringDictionary list = new StringDictionary();
string uid, uname;
MatchCollection matches = mReg.Matches(((TextContent)content).Content);
foreach (Match m in matches)
{
if (!m.Success)
{
continue;
}
uid = m.Groups["ID"].Value;
uname = m.Groups["NAME"].Value;
if (!String.IsNullOrEmpty(uid) && !list.ContainsKey(uid) && !String.IsNullOrEmpty(uname))
{
list.Add(uid, uname);
Console.WriteLine("ID={0},Name='{1}'", uid, uname);
}
}
if (list.Count == 0)
{
return;
}
foreach (string k in list.Keys)
{
string sql = String.Format("select COUNT(`uid`) from users where uid={0:d}", k);
int n = Convert.ToInt32(db.ExecuteScalar(sql));
if (n > 0)
{
continue;
}
sql = String.Format("INSERT INTO users (uid, uname, email)VALUES('{0:d}', '{1}', '');", k, list[k]);
db.ExecuteNonQuery(sql);
}
}
/// <summary> /// 在派生类中重写此方法，对内容进行处理 /// </summary> /// <param name="content">Content实例</param> /// <param name="context">ProcessContext上下文信息</param> public abstract void Process(Content content, ProcessContext context);
/// <summary>
/// 从给定内容中提取URL字符串,返回一个IEnumerable泛型集合,元素为string
/// </summary>
/// <param name="content">Content实例</param>
/// <returns>IEnumerable</returns>
protected override IEnumerable<KeyValuePair<string, string>> FindUrls(Content content)
{
if (null == content || content.GetType() != typeof(TextContent))
{
return null;
}
List<KeyValuePair<string, string>> urls = new List<KeyValuePair<string, string>>();
string url, text;
if (null != this.regexA)
{
foreach (Match m in this.regexA.Matches(((TextContent)content).Content))
{
url = m.Groups["URL"].Value;
text = m.Groups["TEXT"].Value;
if (null != url && "" != url)
{
urls.Add(new KeyValuePair<string, string>(url, text));
}
}
}
if (null != this.regexImg)
{
foreach (Match m in this.regexImg.Matches(((TextContent)content).Content))
{
url = m.Groups["SRC"].Value;
text = "";
Match match = UrlExtractor.ImageAltRegex.Match(m.Value);
if (match.Success)
{
text = match.Groups["ALT"].Value;
}
if (null != url && "" != url)
{
urls.Add(new KeyValuePair<string, string>(url, text));
}
}
}
return urls;
}
protected ContentBase(Content content)
:this()
{
this.Content = content;
}
private ContentBase()
{
this.Content = null;
}
