/// <summary>
/// 爬取省份
/// </summary>
/// <returns></returns>
private async Task CrawlingProvinces()
{
var url = BaseUrl + "index.html";
var html = await GetResponse(url);
var doc = new HtmlDocument();
doc.LoadHtml(html);
var nodeList = doc.DocumentNode.SelectNodes("//tr[@class='provincetr']//a");
foreach (var node in nodeList)
{
var href = node.Attributes["href"].Value;
var code = href.Split('.')[0];
var model = new AreaCrawlingModel
{
Code = CompleteCode(code),
Name = node.InnerText,
FullName = node.InnerText
};
SetPinyin(model);
await CrawlingCoord(model);
CrawlingCities(model, href, code);
_list.Add(model);
}
}
/// <summary>
/// 爬取坐标
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
private async Task CrawlingCoord(AreaCrawlingModel entity)
{
try
{
var url = "https://restapi.amap.com/v3/place/text?key=8325164e247e15eea68b59e89200988b&keywords=" +
entity.Name;
var json = await _httpClient.GetStringAsync(url);
if (json.NotNull())
{
var model = JsonConvert.DeserializeAnonymousType(json, new { pois = new[] { new { location = "" } } });
if (model.pois.Any())
{
var location = model.pois.First().location;
if (location.NotNull())
{
var arr = location.Split(',');
entity.Longitude = arr[0];
entity.Latitude = arr[1];
}
}
}
}
catch
{
Thread.Sleep(1000);
await CrawlingCoord(entity);
}
}
/// <summary>
/// 爬取镇
/// </summary>
/// <param name="parent"></param>
/// <param name="url"></param>
/// <param name="provinceCode"></param>
/// <returns></returns>
private void CrawlingTown(AreaCrawlingModel parent, string url, string provinceCode)
{
try
{
var html = GetResponse(BaseUrl + provinceCode + "/" + url).Result;
if (html.NotNull())
{
var doc = new HtmlDocument();
doc.LoadHtml(html);
var nodeList = doc.DocumentNode.SelectNodes("//tr[@class='towntr']");
foreach (var node in nodeList)
{
var codeNode = node.SelectSingleNode("td[1]/a");
var nameNode = node.SelectSingleNode("td[2]/a");
var model = new AreaCrawlingModel
{
Code = codeNode.InnerText,
Name = nameNode.InnerText,
FullName = parent.FullName + nameNode.InnerText
};
SetPinyin(model);
CrawlingCoord(model).ConfigureAwait(false);
parent.Children.Add(model);
_logger.LogDebug(model.FullName);
}
}
}
catch (Exception ex)
{
_logger.LogError($"爬取{parent.FullName}城镇失败");
_logger.LogDebug(ex.Message);
parent.Children = new List <AreaCrawlingModel>();
Thread.Sleep(2000);
CrawlingTown(parent, url, provinceCode);
}
}
/// <summary>
/// 设置拼音
/// </summary>
/// <param name="entity"></param>
private void SetPinyin(AreaCrawlingModel entity)
{
entity.Pinyin = NPinyin.Pinyin.GetPinyin(entity.Name);
entity.Jianpin = NPinyin.Pinyin.GetInitials(entity.Name);
}
/// <summary>
/// 爬取区县
/// </summary>
/// <param name="parent"></param>
/// <param name="url"></param>
/// <param name="provinceCode"></param>
/// <returns></returns>
private void CrawlingCounty(AreaCrawlingModel parent, string url, string provinceCode)
{
try
{
var isTown = false;
var html = GetResponse(BaseUrl + url).Result;
if (html.NotNull())
{
var doc = new HtmlDocument();
doc.LoadHtml(html);
var nodeList = doc.DocumentNode.SelectNodes("//tr[@class='countytr']");
if (nodeList == null)
{
nodeList = doc.DocumentNode.SelectNodes("//tr[@class='towntr']");
isTown = true;
}
if (nodeList == null)
{
_logger.LogDebug("没有数据");
return;
}
foreach (var node in nodeList)
{
var codeNode = node.SelectSingleNode("td[1]/a");
var nameNode = node.SelectSingleNode("td[2]/a");
if (codeNode == null)
{
codeNode = node.SelectSingleNode("td[1]");
nameNode = node.SelectSingleNode("td[2]");
}
if (codeNode == null || nameNode == null || nameNode.InnerText == "市辖区")
{
continue;
}
var model = new AreaCrawlingModel
{
Code = codeNode.InnerText,
Name = nameNode.InnerText,
FullName = parent.FullName + nameNode.InnerText
};
SetPinyin(model);
CrawlingCoord(model).ConfigureAwait(false);
if (!isTown)
{
var hrefAttribute = codeNode.Attributes["href"];
if (hrefAttribute != null)
{
CrawlingTown(model, hrefAttribute.Value, provinceCode);
}
}
parent.Children.Add(model);
}
}
}
catch (Exception ex)
{
Thread.Sleep(5000);
parent.Children = new List <AreaCrawlingModel>();
_logger.LogError($"爬取{parent.Name}下的区县失败");
_logger.LogError(ex.Message);
CrawlingCounty(parent, url, provinceCode);
}
}