/// <summary>
/// 下载一个远程文件到指定的文件路径里
/// </summary>
/// <param name="davFile">一个WebDavFile的实体</param>
/// <param name="localFile">本地的文件地址</param>
/// <returns></returns>
private DownloadInfo DownloadFile(WebDavFile davFile, string localFile)
{
DownloadInfo info = new DownloadInfo {
FileUrl = davFile.Url
};
try
{
DownloadManager manager = new DownloadManager(GetCredentials());
string remoteFile = davFile.Url;
bool result = false;
if (File.Exists(localFile))
{
FileInfo fm = new FileInfo(localFile);
//判断本地文件是否和远程的一样
if (davFile.LastModifyDate == fm.LastWriteTime && davFile.Length == fm.Length)
{
info.Success = true;
result = true;
}
}
if (!info.Success)
{
string folder = localFile.Substring(0, localFile.LastIndexOf("\\") + 1);
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
FileInfo file = new FileInfo(localFile);
if (file.Directory != null)
{
Directory.CreateDirectory(file.Directory.FullName);
}
//下载文件到指定的地址
result = manager.DownloadFile(davFile, localFile);
//更改文件最后修改时间
if (davFile.LastModifyDate != null)
{
File.SetLastWriteTime(localFile, davFile.LastModifyDate.Value);
}
info.Success = true;
}
}
catch (Exception ex)
{
info.Success = false;
info.Message = ex.Message;
}
return(info);
}
/// <summary>
/// 下载一个远程文件到指定的文件夹里，会根据远程文件的地址创建对应的目录结构
/// </summary>
/// <param name="file"></param>
/// <param name="defaultFoder"></param>
/// <param name="index">当前下载第几个</param>
/// <param name="total">总共文件数</param>
/// <returns></returns>
private DownloadInfo Download(WebDavFile file, string defaultFoder, int index = 1, int total = 1)
{
string folderPath = CreateFolder(file.Url, defaultFoder);
string localFile = folderPath + "\\" + file.DispalyName;
file.DownloadPath = localFile;
file.DownloadFolderPath = folderPath;
//如若DownloadCompling不为空，执行相关的事件
DownloadCompling?.Invoke(file, index, total);
//下载文件到本地
DownloadInfo result = DownloadFile(file, localFile);
// //DownloadCompleted，执行相关的事件
DownloadCompleted?.Invoke(file, index, total);
return(result);
}
/// <summary>
/// 下载文件到本地指定的路径
/// </summary>
/// <param name="file">WebDav实体</param>
/// <param name="localfile">本地文件路径</param>
/// <returns></returns>
public bool DownloadFile(WebDavFile file, string localfile)
{
bool isDownloadSuccessfully = false;
try
{
if (this.WebClientDownloadInstallerFile(file, localfile))
{
isDownloadSuccessfully = true;
}
}
catch
{
isDownloadSuccessfully = false;
}
return(isDownloadSuccessfully);
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="file">Webdav文件实例</param>
/// <param name="localfile">下载文件地址</param>
/// <returns>True：下载成功；false:下载不成功；</returns>
private bool WebClientDownloadInstallerFile(WebDavFile file, string localfile)
{
string url = file.Url;
bool resumeDownload = IsResume(url, localfile);
string tempFileName = localfile + ".temp";
bool isDownloadSuccessfully = false;
FileMode fm = FileMode.Create;
Stream stream = null;
FileStream fileStream = null;
HttpWebResponse response = null;
try
{
Uri installerUrl = new Uri(url);
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.Credentials = _credentials;
if (resumeDownload)
{
//断点续传
FileInfo fn = new FileInfo(tempFileName);
httpWebRequest.Headers["Range"] = (new RangeHeaderValue(fn.Length, file.Length)).ToString();
fm = FileMode.Append;
}
response = (HttpWebResponse)httpWebRequest.GetResponseAsync().GetAwaiter().GetResult();
stream = response.GetResponseStream();
//获取响应流，写入到文件
double contentLength = DownloadManager.GetContentLength(response);
byte[] buffer = new byte[BufferSize];
long downloadedLength = 0;
int currentDataLength;
fileStream = new FileStream(tempFileName, fm);
while ((currentDataLength = stream.Read(buffer, 0, BufferSize)) > 0)
{
fileStream.Write(buffer, 0, currentDataLength);
downloadedLength += (long)currentDataLength;
}
if (currentDataLength >= 0)
{
isDownloadSuccessfully = true;
}
}
catch (Exception ex)
{
// todo
}
finally
{
if (fileStream != null)
{
fileStream.Flush();
fileStream.Dispose();
}
if (stream != null)
{
stream.Dispose();
}
if (response != null)
{
response.Dispose();
}
}
if (isDownloadSuccessfully)
{
if (File.Exists(localfile))
{
Util.DeleteFileIfExists(localfile);
}
File.Move(tempFileName, localfile);
string tempFileInfoName = localfile + ".temp.info";
if (File.Exists(tempFileInfoName))
{
Util.DeleteFileIfExists(tempFileInfoName);
}
}
return(isDownloadSuccessfully);
}
/// <summary>
/// 获取WebDav远程地址的文件列表地址
/// </summary>
/// <param name="remoteFilePth">远程文件目录，如http://172.23.0.1/met<</param>
/// <param name="filters">后缀名过滤</param>
/// <returns>返回的所有的文件集合</returns>
public List <WebDavFile> GetFiles(string remoteFilePth, params string[] filters)
{
List <WebDavFile> filesList = new List <WebDavFile>();
Uri listUri = GetServerUrl(remoteFilePth, true);
if (remoteFilePth.ToLower().StartsWith("http://") || remoteFilePth.StartsWith("https://"))
{
listUri = new Uri(remoteFilePth);
}
StringBuilder propfind = new StringBuilder();
propfind.Append("<?xml version=\"1.0\" encoding=\"utf-8\" ?>");
propfind.Append("<propfind xmlns=\"DAV:\">");
propfind.Append(" <allprop/>");
propfind.Append("</propfind>");
IDictionary <string, string> headers = new Dictionary <string, string>();
headers.Add("Depth", "1");
using (
HttpWebResponse response = HttpRequest(listUri, "PROPFIND", headers,
Encoding.UTF8.GetBytes(propfind.ToString())))
{
using (Stream stream = response.GetResponseStream())
{
System.Xml.XmlDocument xml = new System.Xml.XmlDocument();
xml.Load(stream);
XmlNamespaceManager xmlNsManager = new XmlNamespaceManager(xml.NameTable);
xmlNsManager.AddNamespace("d", "DAV:");
Windows.Data.Xml.Dom.XmlDocument xmlDom = new Windows.Data.Xml.Dom.XmlDocument();
xmlDom.LoadXml(xml.OuterXml);
Windows.Data.Xml.Dom.XmlNodeList listNodes = xmlDom.DocumentElement.ChildNodes;
for (int i = 0; i < listNodes.Count; i++)
{
IXmlNode node = listNodes[i];
IXmlNode first = node.ChildNodes.Where(x => x.NodeName.ToLower() == "d:href").FirstOrDefault();
if (first.InnerText == remoteFilePth)
{
continue;
}
WebDavFile oWebDavFile = new WebDavFile {
Url = first.InnerText
};
IXmlNode secNode = node.ChildNodes.Where(x => x.NodeName.ToLower() == "d:propstat").FirstOrDefault();
IXmlNode propsNode = secNode.ChildNodes.Where(x => x.NodeName.ToLower() == "d:prop").FirstOrDefault();
//文件的显示名
IXmlNode attrNode = propsNode.ChildNodes.Where(x => x.NodeName.ToLower() == "d:displayname")
.FirstOrDefault();
oWebDavFile.DispalyName = attrNode.InnerText;
if (oWebDavFile.DispalyName == remoteFilePth)
{
continue;
}
//文件的内容类型
attrNode = propsNode.ChildNodes.Where(x => x.NodeName.ToLower() == "d:getcontenttype")
.FirstOrDefault();
oWebDavFile.ContentType = attrNode.InnerText;
//文件的最后修改时间
attrNode = propsNode.ChildNodes.Where(x => x.NodeName.ToLower() == "d:getlastmodified")
.FirstOrDefault();
oWebDavFile.LastModifyDate = DateTime.Parse(attrNode.InnerText);
//文件的创建时间
attrNode = propsNode.ChildNodes.Where(x => x.NodeName.ToLower() == "d:creationdate")
.FirstOrDefault();
oWebDavFile.CreateDate = DateTime.Parse(attrNode.InnerText);
//文件的大小
attrNode = propsNode.ChildNodes.Where(x => x.NodeName.ToLower() == "d:getcontentlength")
.FirstOrDefault();
oWebDavFile.Length = long.Parse(attrNode.InnerText);
filesList.Add(oWebDavFile);
}
}
}
List <WebDavFile> folderDavFiles = filesList.Where(x => x.Length == 0 && x.Url.EndsWith("/")).ToList();
foreach (WebDavFile file in folderDavFiles)
{
if (file.Length == 0 && file.Url.EndsWith("/"))
{
filesList.AddRange(GetFiles(file.Url));
}
}
var q = filesList.Where(x => x.Length != 0);
if (filters != null)
{
q = filters.Aggregate(q, (current, filter) => current.Where(x => !x.Url.ToLower().EndsWith(filter.ToLower())));
}
return(q.ToList());
}
