HttpWebRequest请求 

 1 /// <summary>
 2     /// 模拟网页操作,提交、获取订单页面数据
 3     /// </summary>
 4     public class HttpWebRequestExtension
 5     {
 6         private static string contentType = "application/x-www-form-urlencoded";
 7         private static string accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";
 8         private static string userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; Zune 4.7; BOIE9;ZHCN)";
 9         private static string referer = "https://kyfw.12306.cn/";
10         /// <summary>
11         /// 提交订单数据
12         /// </summary>
13         /// <param name="url"></param>
14         /// <param name="cookie"></param>
15         /// <param name="param"></param>
16         /// <returns></returns>
17         public static string PostWebContent(string url, CookieContainer cookie, string param)
18         {
19             byte[] bs = Encoding.ASCII.GetBytes(param);
20             var httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
21             httpWebRequest.CookieContainer = cookie;
22             httpWebRequest.ContentType = contentType;
23             httpWebRequest.Accept = accept;
24             httpWebRequest.UserAgent = userAgent;
25             httpWebRequest.Method = "POST";
26             httpWebRequest.ContentLength = bs.Length;
27             using (Stream reqStream = httpWebRequest.GetRequestStream())
28             {
29                 reqStream.Write(bs, 0, bs.Length);
30             }
31             var httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
32             Stream responseStream = httpWebResponse.GetResponseStream();
33             StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
34             string html = streamReader.ReadToEnd();
35 
36             streamReader.Close();
37             responseStream.Close();
38 
39             httpWebRequest.Abort();
40             httpWebResponse.Close();
41 
42             return html;
43         }
44 
45         /// <summary>
46         /// 获取页面数据
47         /// </summary>
48         /// <param name="url"></param>
49         /// <param name="cookie"></param>
50         /// <returns></returns>
51         public static string GetWebContent(string url, CookieContainer cookie)
52         { 
53             var httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
54             httpWebRequest.CookieContainer = cookie;
55             httpWebRequest.ContentType = contentType;
56             httpWebRequest.Referer = referer;
57             httpWebRequest.Accept = accept;
58             httpWebRequest.UserAgent = userAgent;
59             httpWebRequest.Method = "GET";
60             httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
61 
62             var httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
63             Stream responseStream = httpWebResponse.GetResponseStream();
64             StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
65             string html = streamReader.ReadToEnd();
66 
67             streamReader.Close();
68             responseStream.Close();
69 
70             httpWebRequest.Abort();
71             httpWebResponse.Close();
72 
73             return html;
74         }
75 
76         /// <summary>
77         /// 获取网页验证码图片
78         /// </summary>
79         /// <param name="url"></param>
80         /// <param name="cookie"></param>
81         /// <returns></returns>
82         public static object GetWebImage(string url, CookieContainer cookie)
83         {
84             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
85             request.Referer = referer;
86             request.UserAgent = "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36";
87             request.Accept = "image/webp,*/*;q=0.8";
88             request.CookieContainer = cookie;
89             request.ContentType = contentType;
90             request.KeepAlive = true;
91             request.UseDefaultCredentials = true;
92           //  request.Proxy = null;
93             return request.GetResponse().GetResponseStream();
94         }
95     }

 

posted @ 2016-03-14 11:38  LiGoper  阅读(171)  评论(0)    收藏  举报