unity5.x assetbundle Create MD5 file

Using Unityengine;
Using Unityeditor;
Using System.IO;
Using System.Xml;
Using System.Collections;
Using System.Collections.Generic;
Using System.Security.Cryptography;


public class Creatmd5:monobehaviour {




public static void Creatmd5xml ()
{
dictionary<string, list<string>> DicFileMD5 = new dictionary<string, list<string>> ();
MD5CryptoServiceProvider md5generator = new MD5CryptoServiceProvider ();


The folder path where you need to create the MD5 file
String dir = System.IO.Path.Combine (Application.datapath, "streamingassets");
MD5 Save Path
String savepath = System.IO.Path.Combine (Application.datapath, "streamingassets");






foreach (String FilePath in Directory.GetFiles (dir))
{
if (Filepath.contains (". Meta") | | filepath.contains ("VersionMD5") | | filepath.contains (". xml")
Continue


FileStream file = new FileStream (FilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
Byte[] hash = md5generator.computehash (file);
list<string> templist = new list<string> ();
String strMD5 = System.BitConverter.ToString (hash);
String size = file. Length.tostring ();
Templist.add (STRMD5);
Templist.add (size);


File. Close ();


String key = Filepath.substring (dir. Length + 1, Filepath.length-dir. LENGTH-1);


if (Dicfilemd5.containskey (key) = = False)
Dicfilemd5.add (key, templist);
Else
Debug.logwarning ("<two File has the same name> name =" + FilePath);
}




if (directory.exists (savepath) = = False)
Directory.CreateDirectory (Savepath);




XmlDocument xmldoc = new XmlDocument ();
XmlElement xmlroot = xmldoc.createelement ("Files");
Xmldoc.appendchild (XmlRoot);
foreach (keyvaluepair<string, list<string>> pair in DicFileMD5)
{
XmlElement Xmlelem = xmldoc.createelement ("File");
Xmlroot.appendchild (Xmlelem);


Xmlelem.setattribute ("FileName", pair. Key);
Xmlelem.setattribute ("MD5", pair. Value[0]);
Xmlelem.setattribute ("Size", pair. VALUE[1]);
}


Xmldoc.save (Savepath + "/versionmd5.xml");
xmldoc = null;




Assetdatabase.refresh ();
}


Static dictionary<string, list<string>> readmd5file (string fileName)
{
dictionary<string, list<string>> DicMD5 = new dictionary<string, list<string>> ();


If the file does not exist, it returns directly
if (System.IO.File.Exists (fileName) = = False)
return DicMD5;


XmlDocument xmldoc = new XmlDocument ();
Xmldoc.load (FileName);
XmlElement xmlroot = xmldoc.documentelement;


foreach (XmlNode node in xmlroot.childnodes)
{
if ((node is xmlelement) = = False)
Continue


list<string> templist = new list<string> ();
string file = (node as XmlElement). GetAttribute ("FileName");
string MD5 = (node as XmlElement). GetAttribute ("MD5");
String size = (node as XmlElement). GetAttribute ("Size");
Templist.add (MD5);
Templist.add (size);


if (dicmd5.containskey (file) = = False)
{
Dicmd5.add (file, templist);
}
}


XmlRoot = null;
xmldoc = null;


return DicMD5;
}
}