/// <summary>
/// 在百度知道查询答案。
/// </summary>
/// <param name="sentence">要查询的句子</param>
/// <param name="num">获取的答案数</param>
/// <returns></returns>
public string[] getBaiduZhidaoAnswers(string sentence, int num = 10)
{
List <string> res = new List <string>();
try
{
string url = $"https://zhidao.baidu.com/search?word={WebConnectActor.UrlEncode(sentence)}";
string html = WebConnectActor.getData(url, Encoding.GetEncoding("gb2312"), cookie);
//FileIOActor.log(url);
//FileIOActor.log(html);
HtmlDocument hdoc = new HtmlDocument();
hdoc.LoadHtml(html);
HtmlNode favurl = null;
try
{
var node = hdoc.DocumentNode.SelectSingleNode("//dt[@class=\"dt mb-8\"]");
if (node != null)
{
favurl = node.ChildNodes[1];
}
}
catch (Exception ex) { FileIOActor.log(ex); }
var urls = hdoc.DocumentNode.SelectNodes("//a[@class=\"ti\"]");
if (favurl != null)
{
urls.Insert(0, favurl);
}
foreach (var aurl in urls)
{
string dw = ItemParser.removeBlank(aurl.GetAttributeValue("href", ""), true);
var areslist = getBaiduZhidaoAnswersByUrl(dw);
if (areslist.Length > 0)
{
res.Add(areslist[0].Trim());
}
if (res.Count > num)
{
break;
}
}
}
catch (Exception ex) { FileIOActor.log(ex); }
return(res.ToArray());
}
/// <summary>
/// 从百度知识图谱数据中取得问题的答案
/// 百度知识图谱包括一些常识信息，也能数学运算、查汇率之类的。
/// 和百度搜索结果中的“智能”显示的知识部分一致
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public string getKGAnswer(string str)
{
if (string.IsNullOrWhiteSpace(str))
{
return("");
}
var res = getBaiduKGResult(str);
if (res.Length > 0)
{
return(ItemParser.removeBlank(res[0]));
}
else
{
return("");
}
}
/// <summary>
/// 暂时不可用
/// </summary>
/// <param name="question"></param>
/// <returns></returns>
public string getAsklibResult(string question)
{
string url = string.Format("http://www.asklib.com/s/{0}", WebConnectActor.UrlEncode(question));
string res = "";
//List<string> res = new List<string>();
string html = WebConnectActor.getData(url, Encoding.UTF8);
HtmlDocument hdoc = new HtmlDocument();
hdoc.LoadHtml(html);
try
{
HtmlNode favurl = null;
try
{
//res = html; return res;
favurl = hdoc.DocumentNode.SelectSingleNode("//div[@class=\"p15 right\"]").ChildNodes[1];
url = ItemParser.removeBlank(favurl.GetAttributeValue("href", ""), true);
url = "http://www.asklib.com/" + url;
html = WebConnectActor.getData(url, Encoding.UTF8);
hdoc = new HtmlDocument();
hdoc.LoadHtml(html);
var tmp = getText(hdoc.DocumentNode.SelectSingleNode("//div[@class=\"listtip\"]").InnerHtml);
StringBuilder sb = new StringBuilder();
foreach (var t in tmp)
{
if (!string.IsNullOrWhiteSpace(t.Trim()))
{
sb.Append(t + "\r\n");
}
}
sb.Replace("\r\n\r\n", "\r\n");
res = sb.ToString();
}
catch { }
}
catch { }
return(res);
}
/// <summary>
/// 从百度知道的问答中找回复
/// 提取出多条搜索结果，然后从中随机选一个
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public string getZhidaoAnswer(string str)
{
if (string.IsNullOrWhiteSpace(str))
{
return("");
}
string result = "";
var res1 = getBaiduZhidaoAnswers(str, 5);
if (res1.Length > 0)
{
int maxlen = 1000;
int findwidth = 30;
var tmp = res1[rand.Next(0, res1.Length)].Replace("展开全部", "").Replace("\r", "").Trim();
tmp = ItemParser.StripHTML(tmp);
try
{
//if (!Directory.Exists(path + answerPath)) Directory.CreateDirectory(path + answerPath);
//File.WriteAllText($"{path}{answerPath}{str}.txt", tmp);
}
catch (Exception e)
{
FileIOActor.log(e.Message + "\r\n" + e.StackTrace);
}
if (tmp.Length <= maxlen)
{
result = tmp;
}
else
{
var tmp2 = tmp;//.Split(new char[] { '\n' },StringSplitOptions.RemoveEmptyEntries)[0];
if (tmp2.Length >= maxlen)
{
int cutPos = tmp2.IndexOfAny(new char[] { '。', '！', '？', '…', '!', '?' }, maxlen - findwidth);
if (cutPos > 0 && cutPos < maxlen + findwidth)
{
result = tmp2.Substring(0, cutPos);
}
else
{
cutPos = tmp2.IndexOfAny(new char[] { ',', '；', '、', ',', '.', '》', '”', '"', '\'' }, maxlen - findwidth);
if (cutPos > 0 && cutPos < maxlen + findwidth)
{
result = tmp2.Substring(0, cutPos);
}
else
{
result = tmp2.Substring(0, maxlen);
}
}
}
else
{
result = tmp2;
}
result += "...";
}
}
return(result);
}
