public static string HttpDownloadFile(string url, string path, UZipProgressDelegate uZipProgress)
{
try
{
if (File.Exists(path))
{
File.Delete(path);
}
String filePath = path.Remove(path.LastIndexOf("\\") + 1);
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
long total = GetFileContentLength(url);
// 设置参数
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
//发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
request.Headers.Add(HttpControl.azHeader, HttpControl.GetFileAutohrization);
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream responseStream = response.GetResponseStream();
Console.WriteLine("开始下载流!");
//创建本地文件写入流
Stream stream = new FileStream(path, FileMode.Create);
Console.WriteLine("开始文件流!");
byte[] bArr = new byte[bytebuff];
int size = responseStream.Read(bArr, 0, (int)bArr.Length);
long currentSize = 0;
DateTime messageTime = DateTime.Now;
while (size > 0)
{
stream.Write(bArr, 0, size);
size = responseStream.Read(bArr, 0, (int)bArr.Length);
currentSize += size;
var timeSpan = (DateTime.Now - messageTime).TotalMilliseconds;
if (timeSpan > 500)
{
uZipProgress(currentSize, total);
messageTime = DateTime.Now;
}
}
stream.Close();
Console.WriteLine("关闭文件流!");
responseStream.Close();
Console.WriteLine("关闭下载流!");
uZipProgress(currentSize, total);
}
catch (Exception ex)
{
String message = ex.Message;
Console.WriteLine(message);
throw (ex);
}
return(path);
}
/// <summary>
/// Zip解压并更新目标文件
/// </summary>
/// <param name="ZipFile">Zip压缩包路径</param>
/// <param name="UnZipDir">解压目标路径</param>
/// <returns></returns>
public static bool UnZip2(String ZipFile, String UnZipDir, UZipProgressDelegate uZipProgress)
{
try
{
UnZipDir = UnZipDir.EndsWith(@"\") ? UnZipDir : UnZipDir + @"\";
using (var zipfile = ZipHelper.OpenOnFile(ZipFile))
{
int total = zipfile.Files.Count();
int index = 0;
foreach (var file in zipfile.Files)
{
if (!file.Name.EndsWith("/"))
{
string FilePath = UnZipDir + file.Name.Replace("/", @"\"); //设置解压路径
string GreatFolder = FilePath.Substring(0, FilePath.LastIndexOf(@"\"));
if (!Directory.Exists(GreatFolder))
{
Directory.CreateDirectory(GreatFolder);
}
byte[] content = new byte[file.GetStream().Length];
file.GetStream().Read(content, 0, content.Length);
index++;
if (File.Exists(FilePath)) //跳过相同的文件，否则覆盖更新
{
if (content.Length == new FileInfo(FilePath).Length)
{
continue;
}
}
else
{
File.WriteAllBytes(FilePath, content);
}
uZipProgress?.Invoke(total, index);
}
}
uZipProgress?.Invoke(total, index);
}
return(true);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return(false);
}
}
/// <summary>
/// 下载文件（同步） 支持断点续传
/// </summary>
/// <param name="url">文件url</param>
/// <param name="savepath">本地保存路径</param>
/// <param name="progress">下载进度（百分比）</param>
/// <param name="size">下载文件大小</param>
public static void DowLoadFile(string url, string savepath, UZipProgressDelegate uZipProgress, long size = 0)
{
//打开上次下载的文件
long lStartPos = 0;
FileStream fs;
if (File.Exists(savepath))
{
//fs = File.OpenWrite(savepath);
//lStartPos = fs.Length;
//fs.Seek(lStartPos, SeekOrigin.Current);//移动文件流中的当前指针
File.Delete(savepath);
}
string direName = Path.GetDirectoryName(savepath);
if (!Directory.Exists(direName))//如果不存在保存文件夹路径，新建文件夹
{
Directory.CreateDirectory(direName);
}
fs = new FileStream(savepath, FileMode.Create);
lStartPos = 0;
HttpWebRequest request = null;
try
{
if (size == 0)
{
size = GetFileContentLength(url);
if (size < 0)
{
return;
}
}
if (size != 0 && size == lStartPos)
{
//下载完成
fs.Close();
return;
}
request = (HttpWebRequest)WebRequest.Create(url);
request.ReadWriteTimeout = ReadWriteTimeOut;
request.Timeout = TimeOutWait;
request.Headers.Add(HttpControl.azHeader, HttpControl.GetFileAutohrization);
if (lStartPos > 0)
{
request.AddRange((int)lStartPos);//设置Range值，断点续传
}
//向服务器请求，获得服务器回应数据流
WebResponse respone = request.GetResponse();
long totalSize = respone.ContentLength + lStartPos;
long curSize = lStartPos;
Stream ns = respone.GetResponseStream();
byte[] nbytes = new byte[bytebuff];
int nReadSize = 0;
while (nReadSize < respone.ContentLength)
{
nReadSize = ns.Read(nbytes, 0, bytebuff);
fs.Write(nbytes, 0, nReadSize);
curSize += nReadSize;
//下载进度计算
uZipProgress?.Invoke(curSize, totalSize);
}
fs.Flush();
ns.Close();
fs.Close();
if (curSize != totalSize)//文件长度不等于下载长度，下载出错
{
throw new Exception();
}
if (request != null)
{
request.Abort();
}
TryNumDic.Remove(url);
}
catch (Exception ex)
{
if (request != null)
{
request.Abort();
}
fs.Close();
if (TryNumDic.ContainsKey(url))
{
if (TryNumDic[url] > MaxTryTime)
{
TryNumDic.Remove(url);
throw new Exception();
}
else
{
TryNumDic[url]++;
}
}
else
{
TryNumDic.Add(url, 1);
}
//DowLoadFile(url, savepath, uZipProgress,size);
}
}
