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C#获取HTTP路径下的所有文件信息

 
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HTTP里我们常用get,post或head方法来获取站点的文件或相关信息.而这些对于上述要求是做不到的.这里使用了"PROPFIND"方法来实现该需求.有兴趣的话可以了解一下相关的资料.

话不多说了.直接上代码.

publicclassResource

{

publicstringName;

publicboolIsFolder;

publicstringUrl;

publicDateTimeLastModified;

}

publicstaticSortedListGetDirectoryContents(stringurl,booldeep)

{

//Retrieve the File

HttpWebRequestRequest = (HttpWebRequest)HttpWebRequest.Create(url);

Request.Headers.Add("Translate: f");

Request.Credentials =CredentialCache.DefaultCredentials;

stringrequestString ="<?xml version=/"1.0/" encoding=/"utf-8/" ?>"+

"<a:propfind xmlns:a=/"DAV:/">"+

"<a:prop>"+

"<a:displayname/>"+

"<a:iscollection/>"+

"<a:getlastmodified/>"+

"</a:prop>"+

"</a:propfind>";

Request.Method ="PROPFIND";

if(deep ==true)

Request.Headers.Add("Depth: infinity");

else

Request.Headers.Add("Depth: 1");

Request.ContentLength = requestString.Length;

Request.ContentType ="text/xml";

StreamrequestStream = Request.GetRequestStream();

requestStream.Write(Encoding.ASCII.GetBytes(requestString), 0,Encoding.ASCII.GetBytes(requestString).Length);

requestStream.Close();

HttpWebResponseResponse;

StreamReaderrespStream;

try

{

Response = (HttpWebResponse)Request.GetResponse();

respStream =newStreamReader(Response.GetResponseStream());

}

catch(WebExceptione)

{

Debug.WriteLine("错误"+ url);

throwe;

}

StringBuilderSB =newStringBuilder();

char[] respChar =newchar[1024];

intBytesRead = 0;

BytesRead = respStream.Read(respChar, 0, 1024);

while(BytesRead > 0)

{

SB.Append(respChar, 0, BytesRead);

BytesRead = respStream.Read(respChar, 0, 1024);

}

respStream.Close();

XmlDocumentXmlDoc =newXmlDocument();

XmlDoc.LoadXml(SB.ToString());

XmlNamespaceManagernsmgr =newXmlNamespaceManager(XmlDoc.NameTable);

nsmgr.AddNamespace("a","DAV:");

XmlNodeListNameList = XmlDoc.SelectNodes("//a:prop/a:displayname", nsmgr);

XmlNodeListisFolderList = XmlDoc.SelectNodes("//a:prop/a:iscollection", nsmgr);

XmlNodeListLastModList = XmlDoc.SelectNodes("//a:prop/a:getlastmodified", nsmgr);

XmlNodeListHrefList = XmlDoc.SelectNodes("//a:href", nsmgr);

SortedListResourceList =newSortedList();

ResourcetempResource;

for(inti = 0; i < NameList.Count; i++)

{

if(HrefList[i].InnerText.ToLower(newCultureInfo("en-US")).TrimEnd(newchar[] {'/'}) != url.ToLower(newCultureInfo("en-US")).TrimEnd(newchar[] {'/'}))

{

tempResource =newResource();

tempResource.Name = NameList[i].InnerText;

tempResource.IsFolder =Convert.ToBoolean(Convert.ToInt32(isFolderList[i].InnerText));

tempResource.Url = HrefList[i].InnerText;

tempResource.LastModified =Convert.ToDateTime(LastModList[i].InnerText);

ResourceList.Add(tempResource.Url, tempResource);

}

}

returnResourceList;

}

主要利用了WebDAV 的功能来实现.请把站点的目录浏览权限给打开,使用时调用上面的方法即可获取相关的信息.如果想下载的话,那可以根据获取的URL再次进行下载.



C# Http文件下载公共类(支持断点续传)

复制代码
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.IO;
usingSystem.Net;

namespaceXcDownLoadFile
{
publicclassDownLoadFile
{
///
///下载文件方法
///
///文件保存路径和文件名
///返回服务器文件名
///
publicboolDeownloadFile(stringstrFileName,stringfile)
{
boolflag=false;
//打开上次下载的文件
longSPosition=0;
//实例化流对象
FileStreamFStream;
//判断要下载的文件夹是否存在
if(File.Exists(strFileName))
{
//打开要下载的文件
FStream=File.OpenWrite(strFileName);
//获取已经下载的长度
SPosition=FStream.Length;
FStream.Seek(SPosition,SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream=newFileStream(strFileName,FileMode.Create);
SPosition=0;
}
try
{
//打开网络连接
HttpWebRequestmyRequest=(HttpWebRequest)HttpWebRequest.Create("http://www.newxing.com/download/"+file);
if(SPosition>0)
myRequest.AddRange((int)SPosition);//设置Range值
//向服务器请求,获得服务器的回应数据流
StreammyStream=myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[]btContent=newbyte[512];
intintSize=0;
intSize=myStream.Read(btContent,0,512);
while(intSize>0)
{
FStream.Write(btContent,0,intSize);
intSize=myStream.Read(btContent,0,512);
}
//关闭流
FStream.Close();
myStream.Close();
flag=true;//返回true下载成功
}
catch(Exception)
{
FStream.Close();
flag=false;//返回false下载失败
}
returnflag;
}
}
}

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