using System.Web;
2using System.Net;
3using System.IO;
4
5namespace MyProject.Controllers
6{
7    public class WebRequestUtility
8    {
9        public string RequestUrl{ get;set;}
10        public string Content { get; set; }
11        public bool ifUrlAvailable { get; set; }
12
13        public WebRequestUtility(string url)
14        {
15            RequestUrl = url;
16            Content = getHttpContent(url);
17            if (Content != "failUrl")
18            {
19                ifUrlAvailable = true;
20            }
21
22        }
23
24
25        /**//// <summary>
26        /// 根据URL读取返回的HTML内容
27        /// </summary>
28        /// <param name="url"></param>
29        /// <returns></returns>
30        public HttpWebRequest  getHttpResponse(string url)
31        {
32            string requestStr = url;
33            HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(requestStr);
34            req.Method = "GET";
35            return req;
36
37        }
38
39        public string getHttpContent(string url)
40        {
41            HttpWebRequest req = getHttpResponse(url);
42            try
43            {
44                WebResponse wr = req.GetResponse();
45                StreamReader sr = new StreamReader(wr.GetResponseStream(), System.Text.Encoding.GetEncoding("gb2312"));
46                return sr.ReadToEnd();
47
48            }
49            catch
50            {
51                //if (e.Status == WebExceptionStatus.ProtocolError)
52                return "failUrl";
53            }
54
55        }
56
57
58        public bool checkUrlAvailability(string url)
59        {
60
61            //string requestStr = url;
62            //HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(requestStr);
63            //req.Method = "GET";
64            HttpWebRequest req = getHttpResponse(url);
65            try
66            {
67                req.GetResponse();
68
69            }
70            catch (WebException e)
71            {
72                if (e.Status == WebExceptionStatus.ProtocolError)
73                    return false;
74            }
75
76            return true;
77
78        }
79
80        /**//// <summary>
81        /// 返回错误信息的逻辑
82        /// </summary>
83        /// <param name="e"></param>
84        protected void logException(string e)
85        {
86            //HttpContext.Current.Response.Write(e);
87        }
88
89
90    }
91}