using System;
using System.Net;
using System.Web;

public class SRWebClient
{
CookieContainer cookie;
public SRWebClient()
{
cookie=new CookieContainer();
}

/**//// <TgData>
/// <Alias>下載Web原始碼</Alias>
/// </TgData>
public string DownloadHtml(string URL)
{
HttpWebRequest request=HttpWebRequest.create(URL) as HttpWebRequest;
request.CookieContainer=cookie;
request.AllowAutoRedirect=false;

WebResponse res=request.GetResponse();
string r="";

System.IO.StreamReader S1 = new System.IO.StreamReader(res.GetResponseStream(), System.Text.Encoding.Default );
try
{
r = S1.ReadToEnd();
}
catch(Exception er)
{
Log l=new Log();
l.writelog("下載Web錯誤",er.ToString());
}
finally
{
res.Close();
S1.Close();
}

return r;
}

/**//// <TgData>
/// <Alias>下載檔案</Alias>
/// </TgData>
public long DownloadFile(string FileURL,string FileSavePath)
{
long Filelength=0;
HttpWebRequest req=HttpWebRequest.create(FileURL) as HttpWebRequest;

req.CookieContainer=cookie;
req.AllowAutoRedirect=true;

HttpWebResponse res=req.GetResponse() as HttpWebResponse;
System.IO.Stream stream=res.GetResponseStream();
try
{
Filelength=res.ContentLength;

byte [] b=new byte[512];

int nReadSize=0;
nReadSize=stream.Read(b,0,512);

System.IO.FileStream fs= System.IO.File.create(FileSavePath);
try
{
while(nReadSize >0)
{
fs.Write(b,0,nReadSize);
nReadSize=stream.Read(b,0,512);
}
}
finally
{
fs.Close();
}
}
catch(Exception er)
{
Log l=new Log();
l.writelog("下載檔案錯誤",er.ToString());
}
finally
{
res.Close();
stream.Close();
}

return Filelength;
}

/**//// <TgData>
/// <Alias>提交資料</Alias>
/// </TgData>
public void Request(string RequestPageURL,RequestData Data)
{
string StrUrl=RequestPageURL;
HttpWebRequest request=HttpWebRequest.create(StrUrl) as HttpWebRequest;
HttpWebResponse response;

string postdata=Data.GetData();
request.Referer=RequestPageURL;
request.AllowAutoRedirect=false;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.01; Windows NT 5.0)";
request.CookieContainer = cookie;

Uri u=new Uri(StrUrl);

if (postdata.Length > 0 ) //包含要提交的資料　就使用Post方式
{
request.ContentType = "application/x-www-form-urlencoded"; //作為表單請求
request.Method = "POST"; //方式就是Post

//把提交的資料換成位元組陣列
Byte [] B = System.Text.Encoding.Default.GetBytes(postdata);
request.ContentLength = B.Length;

System.IO.Stream SW = request.GetRequestStream(); //開始提交資料
SW.Write(B, 0, B.Length);
SW.Close();
}

response = request.GetResponse() as HttpWebResponse;
response.Close();
}


}