public static bool HttpDownloadFile(string downloadUrl, string localPath, log4net.ILog log)
{
bool bFlagDownloadFile = false;
//log.Debug("HttpDownloadFile--准备以HTTP的方式下载文件，url:" + downloadUrl + "本地文件：【" + localPath + "】");
HttpWebRequest request = null;
HttpWebResponse resp = null;
try
{
request = WebRequest.Create(downloadUrl) as HttpWebRequest;
request.Timeout = 3000;
//log.Info("HttpDownloadFile--新建HttpWebRequest！");
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(delegate { return true; });
resp = request.GetResponse() as HttpWebResponse;
string responseCode = string.Empty;
//获得http响应状态
bFlagDownloadFile = getResponseResult(resp.StatusCode, ref responseCode);
//获得HTTP响应的接收流
Stream ns = resp.GetResponseStream();
FileStream fs;
fs = new FileStream(localPath, System.IO.FileMode.Create);
int totalFileLen = 0; //文件最多支持2^32 = 4G
int fileBufferSize = 1024;
byte\[\] nbytes = new bytefileBufferSize;
int nreadsize = ns.Read(nbytes, 0, fileBufferSize);
while (nreadsize > 0)
{
fs.Write(nbytes, 0, nreadsize);
totalFileLen += nreadsize;
nreadsize = ns.Read(nbytes, 0, fileBufferSize);
}
fs.Close();
ns.Close();
bFlagDownloadFile = true;
try
{
if (resp != null)
{
resp.Close();
resp = null;
}
}
catch (Exception e)
{
}
try
{
if (request != null)
{
request.Abort();
request = null;
}
}
catch (Exception e)
{
}
log.Debug("HttpDownloadFile--以HTTP的方式下载文件，本地文件：【" + localPath + "】成功！");
}
catch (Exception ex)
{
log.Error("HttpDownloadFile--以HTTP的方式下载文件，本地文件：【" + localPath + "】时发生错误！异常消息：" + ex.Message,ex);
bFlagDownloadFile = false;
try
{
if (resp != null)
{
resp.Close();
resp = null;
}
}catch(Exception e)
{
}
try
{
if (request != null)
{
request.Abort();
request = null;
}
}
catch (Exception e)
{
}
}
return bFlagDownloadFile;
}