static bool CheckAndUpdate(string url, string dir, RepoFileInfo f, bool checkHash)
{
string msg = null;
var r = CheckFile(dir, f, ref msg, checkHash);
if (r == CheckResult.OK)
return true;
if (r != CheckResult.NotExist || url == null)
Console.WriteLine(msg);
if (url == null)
return false;
Console.WriteLine("Downloading file '{0}' ...", f.Name);
if (r != CheckResult.NotExist)
File.Delete(dir + f.Name);
if (!UpdateFile(url, dir, f.Name))
{
Console.WriteLine("Error");
return false;
}
r = CheckFile(dir, f, ref msg, checkHash);
if (r != CheckResult.OK)
{
Console.WriteLine(msg);
return false;
}
return true;
}
static CheckResult CheckFile(string dir, RepoFileInfo f, ref string msg, bool checkHash)
{
string fname = dir + f.Name;
var fi = new FileInfo(fname);
if (!fi.Exists)
{
msg = String.Format("File '{0}' does not exist.", f.Name);
return CheckResult.NotExist;
}
if (f.Size.HasValue && fi.Length != f.Size)
{
msg = String.Format("File '{0}' size {1} mismatches, needs {2}.", f.Name, fi.Length, f.Size);
return CheckResult.BadSize;
}
if (checkHash)
{
string hType = f.CsumType.ToUpper();
HashAlgorithm hAlg;
if (!algs.TryGetValue(hType, out hAlg))
{
if (hType == "SHA256")
hAlg = new SHA256Cng();
else
hAlg = HashAlgorithm.Create(hType);
algs[hType] = hAlg;
}
string hash;
using (var fs = File.OpenRead(fname))
hash = String.Join("", hAlg.ComputeHash(fs).Select(b => b.ToString("x2")));
if (f.Csum.ToLower() != hash)
{
msg = String.Format("File '{0}' {1}-hash {2} mismatches needed {3}.", f.Name, f.CsumType, hash, f.Csum);
return CheckResult.BadHash;
}
}
return CheckResult.OK;
}