Mikel
[转载]C# 微信 生活助手 空气质量 天气预报等 效果展示 数据抓取 （一） – 开心生活助手 – 博客园.
第一次在博客园写博客写的不好，大家见谅。最近工作辞了，然后感冒发烧输了一个星期的液，感觉很烦躁，心情不是很好，在帝都感觉压力大，废话不说了开始正题把！
还没有完全完成，后续考虑开源！
可以关注微信公众帐号体验一下
先看下 效果把
先介绍下工具 我用的有 httpwatch，fiddler
国家环保部的数据链接 http://datacenter.mep.gov.cn/report/air_daily/airDairyCityHour.jsp
原以为直接get请求就可以了 试了下 发现没有获取了 然后看了下代码 发现
<script type="text/javascript">// <![CDATA[
function submitForm(){
document.citydayform.submit();
}
// ]]></script>
<form style="margin: 0px auto 0px auto;" action="http://datacenter.mep.gov.cn:80/report/air_daily/airDairyCityHour.jsp" method="post" name="citydayform">
<table class="font" border="1" width="95%" cellspacing="0" cellpadding="0" align="center">
<tbody>
<tr>
<td class="STYLE1" align="right" bgcolor="#FFFFEF" width="5%" height="30">城市:</td>
<td bgcolor="#FFFFFF" width="8%">
<input name="city" type="text" value="" /></td>
<td class="STYLE1 STYLE1" align="right" bgcolor="#FFFFEF" width="5%" height="30">时间:</td>
<td bgcolor="#FFFFFF" width="30%"> 从:
<input id="startdate" class="Wdate" style="text-align: center; cursor: pointer; width: 160px; height: 21px; margin-top: 0px;" name="startdate" readonly="readonly" type="text" value="2015-04-16 22:00" />
到:
<input id="enddate" class="Wdate" style="text-align: center; cursor: pointer; width: 160px; height: 21px; margin-top: 0px;" name="enddate" readonly="readonly" type="text" value="2015-04-16 22:00" /></td>
<td bgcolor="#FFFFFF" width="8%">
<div align="center"><input height="19" src="/report/main/images/search.gif" type="image" width="83" /></div></td>
</tr>
</tbody>
</table>
</form>
模型
复制代码
public partial class AirQuality
{
public int Id { get; set; }
public System.DateTime Time { get; set; }
public int AQI { get; set; }
public int CityCode { get; set; }
public string Level { get; set; }
public string PrimaryPollutant { get; set; }
}
抓取代码，通过正则匹配数据
复制代码
while (true)
{
string param = string.Format("city=&startdate={0}&enddate={1}&page={2}", lastGrabHBTime.AddHours(1).ToString("yyyy-MM-dd HH:mm"), currentTime.ToString("yyyy-MM-dd HH:mm"), pageIndex);
#region 数据抓取
while (true)
{
try
{
res = HttpHelper.PostRequest(Constant.HBUrl, param, Encoding.GetEncoding("GB2312"));
break;
}
catch (Exception)
{
Thread.Sleep(1000);
}
}
#endregion
res = Regex.Replace(res, "[\r\n|\t]", "").Replace(" ", " ");
var matches = regex.Matches(res);
if (matches.Count == 0)
break;
foreach (Match match in matches)
{
var group = match.Groups;
if (group.Count == 10)
{
var air = new AirQuality()
{
Time = DateTime.Parse(group[3].Value),
AQI = int.Parse(group[5].Value),
Level = group[7].Value,
PrimaryPollutant = group[9].Value,
CityCode = cityConfigs.FirstOrDefault(p => p.City == group[1].Value).Code
};
airQualities.Add(air);
}
}
pageIndex++;
Thread.Sleep(100);
}
POST请求代码
public static string PostRequest(string url, string param, string cookie = "")
{
return PostRequest(url, param, Encoding.UTF8, cookie);
}
public static string PostRequest(string url, string param, Encoding encoding, string cookie = "")
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(url));
request.ContentType = "application/x-www-form-urlencoded";
request.UserAgent = "Mozilla/5.0 (MSIE 9.0; Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko";
request.Method = "post";
request.Timeout = 30000;
request.KeepAlive = false;
if (!string.IsNullOrEmpty(cookie))
{
request.Headers[HttpRequestHeader.Cookie] = cookie;
}
byte[] bytes = encoding.GetBytes(param);
request.ContentLength = bytes.Length;
using (Stream stream = request.GetRequestStream())
{
stream.Write(bytes, 0, bytes.Length);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (Stream stream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(stream, encoding);
return reader.ReadToEnd();
}
}
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